Pub Date : 2023-03-15DOI: 10.18311/jmmf/2022/32774
Rakesh C M, P. D
In the present work, an attempt has been made to synthesize metal matrix composite using Al7075 as matrix material with B4C particles as reinforcement using liquid metallurgy technique in particular stir casting process. Microstructural characterization was carried out for the above prepared composites by taking specimens from central portion of the casting by microstructural studies and SEM analysis. Tensile, shear, compression and bending properties of the prepared composite were studied before and after addition of Al7075 particulates to note the extent of improvement. Microstructural characterization of the composites has revealed fairly uniform distribution of B4C particulates and some amount of grain refinement in the specimens. The design and analysis of wing root fitting of on medium fighter aircraft carried out using CATIA V5 and ANSYS workbench software. Finite element method is used for the stress analysis. Calculation of equivalent stress, shear stress and total deformation will be considered under this study.
{"title":"Design and Analysis of Wing Root Fitting of a Medium Fighter Aircraft Made of B4C Reinforced Al7075 Alloy","authors":"Rakesh C M, P. D","doi":"10.18311/jmmf/2022/32774","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32774","url":null,"abstract":"In the present work, an attempt has been made to synthesize metal matrix composite using Al7075 as matrix material with B4C particles as reinforcement using liquid metallurgy technique in particular stir casting process. Microstructural characterization was carried out for the above prepared composites by taking specimens from central portion of the casting by microstructural studies and SEM analysis. Tensile, shear, compression and bending properties of the prepared composite were studied before and after addition of Al7075 particulates to note the extent of improvement. Microstructural characterization of the composites has revealed fairly uniform distribution of B4C particulates and some amount of grain refinement in the specimens. The design and analysis of wing root fitting of on medium fighter aircraft carried out using CATIA V5 and ANSYS workbench software. Finite element method is used for the stress analysis. Calculation of equivalent stress, shear stress and total deformation will be considered under this study.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48878441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-15DOI: 10.18311/jmmf/2022/31054
Sujeet Magi, C. Ramesha, R. P, Mohanraju S
This Aluminium is a valuable metal because of its goodcorrosion resistance, reflectivity,recycling properties,electrical and thermal conductivity. Materials having high strength-to-weight ratios, as well as qualities like good corrosion resistance, low weight, creep resistance, and high thermal strength, are required in aerospace applications. Cost parameters must also be considered without sacrificing quality. Al, Ti, Mg, Ni, and their alloys are often utilised in aircraft industries for most of their sub components, depending on the qualities required. Following that, several research initiatives were undertaken with the goal of gaining a better knowledge of their structural performance and developing accurate and trustworthy design. Erosion is the loss of material caused by the repetitive impact of small solid, liquid, or a mixture of solid and liquid particles on a surface. Weather-related erosion, as well as other present particles such as rain, hail, and ice, sand, volcanic ash, and dust arising from residues in the atmosphere, are all harmful to the structure of a aircraft and can reduce its lifecycle. The focus of this paper is to review of research on impact of erosion on aluminium alloys by analysing previously published work and which are used in various applications.
{"title":"A Review on Erosion of Aluminium Alloy for Various Application","authors":"Sujeet Magi, C. Ramesha, R. P, Mohanraju S","doi":"10.18311/jmmf/2022/31054","DOIUrl":"https://doi.org/10.18311/jmmf/2022/31054","url":null,"abstract":"This Aluminium is a valuable metal because of its goodcorrosion resistance, reflectivity,recycling properties,electrical and thermal conductivity. Materials having high strength-to-weight ratios, as well as qualities like good corrosion resistance, low weight, creep resistance, and high thermal strength, are required in aerospace applications. Cost parameters must also be considered without sacrificing quality. Al, Ti, Mg, Ni, and their alloys are often utilised in aircraft industries for most of their sub components, depending on the qualities required. Following that, several research initiatives were undertaken with the goal of gaining a better knowledge of their structural performance and developing accurate and trustworthy design. Erosion is the loss of material caused by the repetitive impact of small solid, liquid, or a mixture of solid and liquid particles on a surface. Weather-related erosion, as well as other present particles such as rain, hail, and ice, sand, volcanic ash, and dust arising from residues in the atmosphere, are all harmful to the structure of a aircraft and can reduce its lifecycle. The focus of this paper is to review of research on impact of erosion on aluminium alloys by analysing previously published work and which are used in various applications.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46471700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-15DOI: 10.18311/jmmf/2022/31223
Naveen kumar Y, Vinod Kumar M S, R. Suresh, N. Jagadeeswaran
The management of complex medication is required for avoiding it before it seriously affects the health of the aged people. Due to physical and mental decline, they need to take a number of drugs. In such a scenario, forgetting to take prescribed medicine is one of the problems. In hospitals there are many patients and it is difficult to remind every patient to take medicine on time. The traditional ways require human efforts to remind them to take medicines on time. The digital era doesn’t follow that and we can use machines to do that. can introduce in a solution a movable automatic medicine reminder and indicator this system will remind medicine. It can set an alarm on their dosage timings The alarm can be set for multiple medicines and timings including date. The system can be moved from one place to another place by using a mobile to control the entire unit. It is a combination of physical and digital reminders that will be helpful for people of any age, but is especially helpful to old people who forget to take their medications.
{"title":"Movable Automatic Medicine Reminder and Indicator Using Arduino","authors":"Naveen kumar Y, Vinod Kumar M S, R. Suresh, N. Jagadeeswaran","doi":"10.18311/jmmf/2022/31223","DOIUrl":"https://doi.org/10.18311/jmmf/2022/31223","url":null,"abstract":"The management of complex medication is required for avoiding it before it seriously affects the health of the aged people. Due to physical and mental decline, they need to take a number of drugs. In such a scenario, forgetting to take prescribed medicine is one of the problems. In hospitals there are many patients and it is difficult to remind every patient to take medicine on time. The traditional ways require human efforts to remind them to take medicines on time. The digital era doesn’t follow that and we can use machines to do that. can introduce in a solution a movable automatic medicine reminder and indicator this system will remind medicine. It can set an alarm on their dosage timings The alarm can be set for multiple medicines and timings including date. The system can be moved from one place to another place by using a mobile to control the entire unit. It is a combination of physical and digital reminders that will be helpful for people of any age, but is especially helpful to old people who forget to take their medications.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44994882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-15DOI: 10.18311/jmmf/2022/32772
Chandra Mohan H. K, Devaraj S, Narayana Swamy K. S, Venkatesh B K
Al-30 wt.% Si hypereutectic alloy was produced by die casting and spray forming technique. The microstructures, mechanical and tribological properties of the alloy were studied. The density of die cast and spray formed samples are measured using water displacement method by applying the Archimedes principle. The scanning electron micrographs of die cast and spray formed alloys revealed the morphological changes of silicon phase from coarse silicon needles to fine silicon needles due to high undercooling encountered in spray forming. The size of the hard silicon platelets are decreased from 22 µm to less than 10 µm as the processing method is changed from die casing to spray forming. The average Vickers micro hardness of die cast and spray formed alloy are 70.06±2.65 HV and 78.05±2.01 HV respectively. The respective yield strengths of die cast and spray formed alloy are 130±9MPa and 150 ±7 MPa and the compression strengths are 251±11.6 MPa and 283±6.32 MPa. The precipitation strengthening mechanism is found to be involved in spray formed alloy.
{"title":"Microstructure and Tribological Property Correlations of Die Cast and Spray Formed Al-30 wt.% Si Alloy","authors":"Chandra Mohan H. K, Devaraj S, Narayana Swamy K. S, Venkatesh B K","doi":"10.18311/jmmf/2022/32772","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32772","url":null,"abstract":"Al-30 wt.% Si hypereutectic alloy was produced by die casting and spray forming technique. The microstructures, mechanical and tribological properties of the alloy were studied. The density of die cast and spray formed samples are measured using water displacement method by applying the Archimedes principle. The scanning electron micrographs of die cast and spray formed alloys revealed the morphological changes of silicon phase from coarse silicon needles to fine silicon needles due to high undercooling encountered in spray forming. The size of the hard silicon platelets are decreased from 22 µm to less than 10 µm as the processing method is changed from die casing to spray forming. The average Vickers micro hardness of die cast and spray formed alloy are 70.06±2.65 HV and 78.05±2.01 HV respectively. The respective yield strengths of die cast and spray formed alloy are 130±9MPa and 150 ±7 MPa and the compression strengths are 251±11.6 MPa and 283±6.32 MPa. The precipitation strengthening mechanism is found to be involved in spray formed alloy.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":"248 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135748168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-14DOI: 10.18311/jmmf/2022/32097
Haizam Hamidun, E. T. Mohamad
The demand for construction materials produced by quarry rises in tandem with urbanization. The enormous number of complaints, however, has put the quarry owner under constant pressure to ensure safe blasting operations and minimal blasting effect on the environment. Due to the fact that limestone naturally dissolves in water and creates numerous weak spots in rock masses, it has always been thought that limestone quarry operations are more risky than common granite quarry operations. The goal of the study was to identify the rock mass properties of limestone and how they related to the consequences of blasting operations. For a systematic study, the quarry face was divided into four (4) Sections i.e., Section A, Section B, Section C, and Section D. The preliminary study was involved site investigation for quarry face evaluation and data collection as well as results from blast monitoring program for two months in a row was also recorded. The analysis was started with calculation of Blastability Index (BI) of the study area based on rock mass properties data and Blastability Quality System (BQS). The new predicted site constant (rock mass properties), κ and β were calculated based on two globally recognized empirical equations i.e., USBM and Langefors-Kihlstrom and the results was employed as indicator for future blasting operations. The SPSS Regression Model analysis graphs shown USBM predictor was inversely proportional to the PPV, while, the Langefors-Kihlstrom predictor graph was proportional to the PPV. The calculated K and β values for USBM predictor was 40 and 1.0 respectively. Based on the analysis, the rock mass properties at this limestone quarry have high influence to blasting effects and the effect can be aggravated at certain study sections. From all sections, Section A was deemed the most sensitive area or has the highest risk of generating excessive environmental effect with the lowest BI value (higher rock strength) at 49.18%, located closest to sensitive public buildings and recorded the most joint sets. It is can be concluded that the blasting activities in this quarry although at maximum charge per delay (Wmax) was being carried out safely with very minimal effects to the surrounding areas and in accordance to the limits set by the relevant authorities i.e., JMG and DOE Malaysia.
{"title":"Effects of Blast Design to the Environment in Limestone Quarry","authors":"Haizam Hamidun, E. T. Mohamad","doi":"10.18311/jmmf/2022/32097","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32097","url":null,"abstract":"The demand for construction materials produced by quarry rises in tandem with urbanization. The enormous number of complaints, however, has put the quarry owner under constant pressure to ensure safe blasting operations and minimal blasting effect on the environment. Due to the fact that limestone naturally dissolves in water and creates numerous weak spots in rock masses, it has always been thought that limestone quarry operations are more risky than common granite quarry operations. The goal of the study was to identify the rock mass properties of limestone and how they related to the consequences of blasting operations. For a systematic study, the quarry face was divided into four (4) Sections i.e., Section A, Section B, Section C, and Section D. The preliminary study was involved site investigation for quarry face evaluation and data collection as well as results from blast monitoring program for two months in a row was also recorded. The analysis was started with calculation of Blastability Index (BI) of the study area based on rock mass properties data and Blastability Quality System (BQS). The new predicted site constant (rock mass properties), κ and β were calculated based on two globally recognized empirical equations i.e., USBM and Langefors-Kihlstrom and the results was employed as indicator for future blasting operations. The SPSS Regression Model analysis graphs shown USBM predictor was inversely proportional to the PPV, while, the Langefors-Kihlstrom predictor graph was proportional to the PPV. The calculated K and β values for USBM predictor was 40 and 1.0 respectively. Based on the analysis, the rock mass properties at this limestone quarry have high influence to blasting effects and the effect can be aggravated at certain study sections. From all sections, Section A was deemed the most sensitive area or has the highest risk of generating excessive environmental effect with the lowest BI value (higher rock strength) at 49.18%, located closest to sensitive public buildings and recorded the most joint sets. It is can be concluded that the blasting activities in this quarry although at maximum charge per delay (Wmax) was being carried out safely with very minimal effects to the surrounding areas and in accordance to the limits set by the relevant authorities i.e., JMG and DOE Malaysia.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47975496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-14DOI: 10.18311/jmmf/2022/32101
Girish V. Kulkarni, B. P. Harichandra, N. Jegadeeswaran, A. S. Divakara Shetty, H. Balasubramanya
People living in metropolitan cities have to make their way to anywhere through traffic every day. In traffic areas like signals, narrow roads, bazars etc., there is a very high concentration of air pollutants due to automobile emissions. The air pollution these days is a serious environmental concern. Faster escape solutions are required than permanent over the time changing solutions. In some cities like Delhi the air quality index has reached to an irrefutable level. To avoid such problems, we came through an idea of an Outdoor Air Purifier in heavy traffic areas which would efficiently decrease pollutants emitted by automobiles. The Air Purifier consists of layers of HEPA and Activated Carbon filter. In the present work, the propeller fans mounted in the suction chamber sucks the atmospheric air into the chamber. Then air sucked by the fans pass through the layers of filters where it absorbs the particulate matter as well as VAC and other gaseous chemicals like NOx and SO2. Then the purified air is led to the atmosphere thereby decreasing the Air Quality Index. In addition, the alternate sources of energy like solar panel and wind turbine which are mounted on the unit, so that battery gets charged utilizing renewable energy such as solar and wind. The test results obtained were quite encouraging. There is a reduction of about 98% of CO and 95% HC emissions were revealed from the test results.
{"title":"Design and Development of Outdoor Air Purifier for Automotive Emission Powered by Solar and Wind Energy","authors":"Girish V. Kulkarni, B. P. Harichandra, N. Jegadeeswaran, A. S. Divakara Shetty, H. Balasubramanya","doi":"10.18311/jmmf/2022/32101","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32101","url":null,"abstract":"People living in metropolitan cities have to make their way to anywhere through traffic every day. In traffic areas like signals, narrow roads, bazars etc., there is a very high concentration of air pollutants due to automobile emissions. The air pollution these days is a serious environmental concern. Faster escape solutions are required than permanent over the time changing solutions. In some cities like Delhi the air quality index has reached to an irrefutable level. To avoid such problems, we came through an idea of an Outdoor Air Purifier in heavy traffic areas which would efficiently decrease pollutants emitted by automobiles. The Air Purifier consists of layers of HEPA and Activated Carbon filter. In the present work, the propeller fans mounted in the suction chamber sucks the atmospheric air into the chamber. Then air sucked by the fans pass through the layers of filters where it absorbs the particulate matter as well as VAC and other gaseous chemicals like NOx and SO2. Then the purified air is led to the atmosphere thereby decreasing the Air Quality Index. In addition, the alternate sources of energy like solar panel and wind turbine which are mounted on the unit, so that battery gets charged utilizing renewable energy such as solar and wind. The test results obtained were quite encouraging. There is a reduction of about 98% of CO and 95% HC emissions were revealed from the test results.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49107848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-14DOI: 10.18311/jmmf/2022/32099
S. Ramalingeswarudu, Ramesh Dundra, V. Sastry, Ch. S. N. Murty
Subsidence monitoring and analysis is an integral part of longwall operation. It provides an assessment of the effect of mining on the surface. In this study, subsidence data is recorded periodically over a longwall panel of 250m of face length and 2333m of gate roadway length for a duration of 12 months. The working seam is inclined at 10 degrees (1 in 5.5) towards tailgate side. Based on the measured data, a profile function is derived indicating vertical ground movement over the major section of the longwall panel. The bed separation of layers in the roof rock is also measured by installing Multi-Point Borehole Extensometer (MPBX) at the centre of the longwall panel and its results are correlated with those of subsidence monitored data. It is found from the analysis of subsidence and MPBX data that there is a good correlation between the bed separation sequence and the subsidence over longwall panel.
{"title":"Analysis of Surface Subsidence and Relative Movements of Underground Rock Strata over an Inclined Longwall Panel","authors":"S. Ramalingeswarudu, Ramesh Dundra, V. Sastry, Ch. S. N. Murty","doi":"10.18311/jmmf/2022/32099","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32099","url":null,"abstract":"Subsidence monitoring and analysis is an integral part of longwall operation. It provides an assessment of the effect of mining on the surface. In this study, subsidence data is recorded periodically over a longwall panel of 250m of face length and 2333m of gate roadway length for a duration of 12 months. The working seam is inclined at 10 degrees (1 in 5.5) towards tailgate side. Based on the measured data, a profile function is derived indicating vertical ground movement over the major section of the longwall panel. The bed separation of layers in the roof rock is also measured by installing Multi-Point Borehole Extensometer (MPBX) at the centre of the longwall panel and its results are correlated with those of subsidence monitored data. It is found from the analysis of subsidence and MPBX data that there is a good correlation between the bed separation sequence and the subsidence over longwall panel.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47861848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dragline operations play a major role in the overall production of coal in open cast mining. Hence, it becomes necessary to maximize the working hours and minimize the idle and breakdown hours as it affects the overall production of a mine. There is also a shortage of skilled labour for dragline operations and combined with the time-to-time breakdown of dragline, it results in a production deficit. In this study, extensive research is carried out using machine learning algorithms on data obtained from one of the largest opencast mines in Singrauli. The data consists of the parameters that were maintained by the staff on a regular basis, and the algorithm tried to learn the underlying patterns between the independent and dependent variables and find the correlation between the parameters that have a significant impact on productivity and breakdown, which were the dependent variables. The results obtained from the algorithms are encouraging and, with certain improvements in data collection procedures, can improve the prediction accuracy to an effective level. An increase in the frequency of data collection and expanding the data recording using sensors to the electrical and mechanical parameters along with the specific type of failure in the dragline machine will further improve the accuracy of the model and can provide beforehand information so that the machine could be handed over to maintenance department for the change of faulty parts and necessary precautions that can be taken to prevent the breakdown which will result in an overall reduction of idle and breakdown hours and increase in overall production.
{"title":"Breakdown and Productivity Prediction of Dragline using Machine Learning Algorithms","authors":"Vikram Seervi, Nilesh Pratap Singh, Nawal Kishore, Rajeev Verma","doi":"10.18311/jmmf/2022/32098","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32098","url":null,"abstract":"Dragline operations play a major role in the overall production of coal in open cast mining. Hence, it becomes necessary to maximize the working hours and minimize the idle and breakdown hours as it affects the overall production of a mine. There is also a shortage of skilled labour for dragline operations and combined with the time-to-time breakdown of dragline, it results in a production deficit. In this study, extensive research is carried out using machine learning algorithms on data obtained from one of the largest opencast mines in Singrauli. The data consists of the parameters that were maintained by the staff on a regular basis, and the algorithm tried to learn the underlying patterns between the independent and dependent variables and find the correlation between the parameters that have a significant impact on productivity and breakdown, which were the dependent variables. The results obtained from the algorithms are encouraging and, with certain improvements in data collection procedures, can improve the prediction accuracy to an effective level. An increase in the frequency of data collection and expanding the data recording using sensors to the electrical and mechanical parameters along with the specific type of failure in the dragline machine will further improve the accuracy of the model and can provide beforehand information so that the machine could be handed over to maintenance department for the change of faulty parts and necessary precautions that can be taken to prevent the breakdown which will result in an overall reduction of idle and breakdown hours and increase in overall production.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42041222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-14DOI: 10.18311/jmmf/2022/32100
Lalit Singh Chouhan, A. K. Raina, V. Murthy
Firing sequence of blastholes in blasting is an inherent part of the blast design for various reasons that range from the spatial requirements to the control of throw during blasting in surface mines. Despite several such patterns in vogue, role of firing sequences in defining the size of fragmented block sizes is not properly understood. The V-type firing pattern is believed to improve blast fragmentation because of the collision of moving fragments during the blasting process, thus resulting in further breakage. There are practically negligible studies that substantiate this assertion. The role of V-type firing pattern has been explored in this paper with simple logic and some field data. It is observed that the V-type firing pattern produces better fragmentation and controls the throw during blasting. A comparison with diagonal firing pattern, in controlled experiments, makes it evident that V-type firing pattern can be used to advantage for fragmentation improvement.
{"title":"V-Type Firing Pattern in Blasting: Evidence to Substantiate the Improved Fragmentation","authors":"Lalit Singh Chouhan, A. K. Raina, V. Murthy","doi":"10.18311/jmmf/2022/32100","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32100","url":null,"abstract":"Firing sequence of blastholes in blasting is an inherent part of the blast design for various reasons that range from the spatial requirements to the control of throw during blasting in surface mines. Despite several such patterns in vogue, role of firing sequences in defining the size of fragmented block sizes is not properly understood. The V-type firing pattern is believed to improve blast fragmentation because of the collision of moving fragments during the blasting process, thus resulting in further breakage. There are practically negligible studies that substantiate this assertion. The role of V-type firing pattern has been explored in this paper with simple logic and some field data. It is observed that the V-type firing pattern produces better fragmentation and controls the throw during blasting. A comparison with diagonal firing pattern, in controlled experiments, makes it evident that V-type firing pattern can be used to advantage for fragmentation improvement.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45324539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-14DOI: 10.18311/jmmf/2022/32759
Jayanta Bhattacharya
No Abstract.
没有抽象的。
{"title":"Preparing Employees for the Responsibility: A Cultural Deficit in the SAM and MOGI Companies","authors":"Jayanta Bhattacharya","doi":"10.18311/jmmf/2022/32759","DOIUrl":"https://doi.org/10.18311/jmmf/2022/32759","url":null,"abstract":"No Abstract.","PeriodicalId":39575,"journal":{"name":"Journal of Mines, Metals and Fuels","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135795674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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