The use of Monte Carlo (MC) simulation was presented inorder to assess uncertainty in life cycle inventory (LCI) studies. The MCmethod is finded as an important tool in environmental science and can beconsidered the most effective quantification approach for uncertainties.Uncertainty of data can be expressed through a definition of probabilitydistribution of that data (e.g. through standard deviation or variance). Thepresented case in this study is based on the example of the emission ofSO2, generated during energy production in Integrated Steel Power Plant(ISPP) in Kraków, Poland. MC simulation using software Crystal Ball®(CB), software, associated with Microsoft® Excel, was used for theuncertainties analysis. The MC approach for assessing parameteruncertainty is described. Analysed parameter (SO2,) performed in MCsimulation were assigned with log-normal distribution. Finally, the resultsobtained using MC simulation, after 10,000 runs, more reliable than thedeterministic approach, is presented in form of the frequency charts andsummary statistics. Thanks to uncertainty analysis, a final result is obtainedin the form of value range. The results of this study will encourage otherresearchers to consider this approach in their projects, and the results ofthis study will encourage other LCA researchers to consider the uncertaintyin their projects and bring closer to industrial application.
{"title":"Application of uncertainty analysis based on Monte Carlo (MC) simulation for life cycle inventory (LCI)","authors":"D. Sala, B. Bieda","doi":"10.29227/im-2019-02-80","DOIUrl":"https://doi.org/10.29227/im-2019-02-80","url":null,"abstract":"The use of Monte Carlo (MC) simulation was presented inorder to assess uncertainty in life cycle inventory (LCI) studies. The MCmethod is finded as an important tool in environmental science and can beconsidered the most effective quantification approach for uncertainties.Uncertainty of data can be expressed through a definition of probabilitydistribution of that data (e.g. through standard deviation or variance). Thepresented case in this study is based on the example of the emission ofSO2, generated during energy production in Integrated Steel Power Plant(ISPP) in Kraków, Poland. MC simulation using software Crystal Ball®(CB), software, associated with Microsoft® Excel, was used for theuncertainties analysis. The MC approach for assessing parameteruncertainty is described. Analysed parameter (SO2,) performed in MCsimulation were assigned with log-normal distribution. Finally, the resultsobtained using MC simulation, after 10,000 runs, more reliable than thedeterministic approach, is presented in form of the frequency charts andsummary statistics. Thanks to uncertainty analysis, a final result is obtainedin the form of value range. The results of this study will encourage otherresearchers to consider this approach in their projects, and the results ofthis study will encourage other LCA researchers to consider the uncertaintyin their projects and bring closer to industrial application.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48530251","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}
With many types of trucks and shovels for hauling large volumeof waste rocks to the dump sites and coal to the storages, the truck – shoveldispatching in Cao Son open pit coal mine is the operation which needs tobe improved. At present, the combination between trucks and shovel isusually assigned at the beginning of shift and adjusted during the operationat the mine. The GPS tracking system are integrated into each truck tomonitor the position in real time, but applying this information to find thebest destination to send the truck to satisfy the production requirementsand to minimize truck operating costs is still not used. This paper presentsthe estimation of the information system, data, the remaining problems oftruck – shovel dispatching system, from that proposes the application ofavailable information technology for increasing the efficiency of thisactivities at the mine.
{"title":"Estimation of truck-shovel dispatching in Cao Son Open-Pit coal mine and the ability in applying information technology for increasing its efficiency","authors":"Van Hoa Pham, X. Bui, V. Le, T. Le, Van Viet Pham","doi":"10.29227/IM-2019-02-53","DOIUrl":"https://doi.org/10.29227/IM-2019-02-53","url":null,"abstract":"With many types of trucks and shovels for hauling large volumeof waste rocks to the dump sites and coal to the storages, the truck – shoveldispatching in Cao Son open pit coal mine is the operation which needs tobe improved. At present, the combination between trucks and shovel isusually assigned at the beginning of shift and adjusted during the operationat the mine. The GPS tracking system are integrated into each truck tomonitor the position in real time, but applying this information to find thebest destination to send the truck to satisfy the production requirementsand to minimize truck operating costs is still not used. This paper presentsthe estimation of the information system, data, the remaining problems oftruck – shovel dispatching system, from that proposes the application ofavailable information technology for increasing the efficiency of thisactivities at the mine.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69824861","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}
Apatite ores type III of Lao Cai area, Vietnam is a class ofweathered sileceous apatite ores, which may have most variable compositionand primary slime content according to the weathering level and location.The three operating flotation plants use similar single-stage grinding circuitsto process the highly weathered sileceous apatite ores and to achieve theconcentrate grade requirement of 31% P2O5 with the aimed averagerecovery of about 70%. Single stage grinding circuits have worked well inthe past as the designed criteria were achieved, however, mine productionhas increased sharply and deeper ores are being mined recently, so that thematerial composition of the run of mine ores have become more complicatedand are the ores become more difficult to be floated. As a result, processingcriteria of these plants become critically unstable and low. The study is toinvestigate the suitabity of two-stage grinding circuits for Lao Cai apatiteore type III. The report presents the results of the study on middlingsregrinding of hard floatable apatite samples of Bac Nhac Son flotation plant,where high loss of valuable apatite has occured due to low grindingperformance. Research results show that regrinding of all middlings to thefineness of 75% -0.04mm not only improves recovery but also help tostabilize technological operations and their processing criteria. The finalconcentrate grade of more than 31% P2O5, tailings content of less than 5%P2O5 and recovery of over 70% were achieved.
{"title":"Rational grinding circuit for siliceous apatite ore type III of Lao Cai Vietnam","authors":"Luan Pham Van, Phu Nguyen Ngoc, Ha Le Viet","doi":"10.29227/im-2019-02-70","DOIUrl":"https://doi.org/10.29227/im-2019-02-70","url":null,"abstract":"Apatite ores type III of Lao Cai area, Vietnam is a class ofweathered sileceous apatite ores, which may have most variable compositionand primary slime content according to the weathering level and location.The three operating flotation plants use similar single-stage grinding circuitsto process the highly weathered sileceous apatite ores and to achieve theconcentrate grade requirement of 31% P2O5 with the aimed averagerecovery of about 70%. Single stage grinding circuits have worked well inthe past as the designed criteria were achieved, however, mine productionhas increased sharply and deeper ores are being mined recently, so that thematerial composition of the run of mine ores have become more complicatedand are the ores become more difficult to be floated. As a result, processingcriteria of these plants become critically unstable and low. The study is toinvestigate the suitabity of two-stage grinding circuits for Lao Cai apatiteore type III. The report presents the results of the study on middlingsregrinding of hard floatable apatite samples of Bac Nhac Son flotation plant,where high loss of valuable apatite has occured due to low grindingperformance. Research results show that regrinding of all middlings to thefineness of 75% -0.04mm not only improves recovery but also help tostabilize technological operations and their processing criteria. The finalconcentrate grade of more than 31% P2O5, tailings content of less than 5%P2O5 and recovery of over 70% were achieved.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69825263","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}
Having enjoyed an economic upsurge in recent years, Vietnam isnow recording increased demand for electrical energy. Its production, forthe most part, relies on the coal mining industry, thus resulting in a strongupward trend in mining volumes. Being geologically complex, Vietnamesemines are characterised by a complicated structure of their headings. Thelocal ventilation systems are also affected by there being very few automaticdams and an by increases in airflows delivered to the mine. For this reason,in order to analyse airflows and maintain the proper control of ventilationsystems, computer software is required. The article offers a comparison ofcomputer programs – Kazemaru, VentGraph and VentSim – as employedfor use in Vietnamese mines. The assessment covered the manner in whichthese programs are used and how their output data are presented, as well astheir range of applications in the conditions of Vietnamese coal mines.
{"title":"The use of computer programs to solve ventilation issues in Vietnamese coal mines","authors":"Hoaithuong Bui, P. Życzkowski, R. Łuczak","doi":"10.29227/im-2019-02-65","DOIUrl":"https://doi.org/10.29227/im-2019-02-65","url":null,"abstract":"Having enjoyed an economic upsurge in recent years, Vietnam isnow recording increased demand for electrical energy. Its production, forthe most part, relies on the coal mining industry, thus resulting in a strongupward trend in mining volumes. Being geologically complex, Vietnamesemines are characterised by a complicated structure of their headings. Thelocal ventilation systems are also affected by there being very few automaticdams and an by increases in airflows delivered to the mine. For this reason,in order to analyse airflows and maintain the proper control of ventilationsystems, computer software is required. The article offers a comparison ofcomputer programs – Kazemaru, VentGraph and VentSim – as employedfor use in Vietnamese mines. The assessment covered the manner in whichthese programs are used and how their output data are presented, as well astheir range of applications in the conditions of Vietnamese coal mines.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69825489","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}
Air leakage of auxiliary ventilation ducting systems is the most commonreason for the insufficient fresh air in the working face in underground mine.This value is important design parameter for mine auxiliary ventilationsystem that operates more effectively, with lower cost.Therefore, determination of air leakage along auxiliary ventilation ductingsystems has been examined. Also, factors which affect air leakage in theducting system have been investigated. Experimental data are made on 0.7m and 1 m diameter ducts over sections of ducts installing towards theworking face in Quang Ninh mine.
{"title":"A study on relationship of duct leakage and parameters of ducts in Quang Ninh mine","authors":"Thao Dang Phuong, Chi Dang Vu","doi":"10.29227/im-2019-02-72","DOIUrl":"https://doi.org/10.29227/im-2019-02-72","url":null,"abstract":"Air leakage of auxiliary ventilation ducting systems is the most commonreason for the insufficient fresh air in the working face in underground mine.This value is important design parameter for mine auxiliary ventilationsystem that operates more effectively, with lower cost.Therefore, determination of air leakage along auxiliary ventilation ductingsystems has been examined. Also, factors which affect air leakage in theducting system have been investigated. Experimental data are made on 0.7m and 1 m diameter ducts over sections of ducts installing towards theworking face in Quang Ninh mine.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47397671","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}
The current mining operation of mineral resources in QuangNinh province-Vietnam is increasingly complicated. Correspondingly, themanagement of the mine sites becomes more difficult. Records anddocuments of minerals and mine sites are archived in different forms.Database systems are stored dispersedly and insufficiently; in many caseslack accuracy, topicality and have not been linked to each othersystematically. These lead to many difficulties in accessing and extractinginformation for the implementation of management as well as for investorsand people with related interest. In this paper an advanced software hasbeen developed for the management of mineral resources and has beenapplied for Quang Ninh province. The software has improved thesupervision and administration of the mining operation in the province.
{"title":"Application of information technology to improve the management of mineral resources in Quang Ninh province - Vietnam","authors":"Vanchi Dao, C. Nguyen, Tien Le, Leilin Zhang","doi":"10.29227/im-2019-02-76","DOIUrl":"https://doi.org/10.29227/im-2019-02-76","url":null,"abstract":"The current mining operation of mineral resources in QuangNinh province-Vietnam is increasingly complicated. Correspondingly, themanagement of the mine sites becomes more difficult. Records anddocuments of minerals and mine sites are archived in different forms.Database systems are stored dispersedly and insufficiently; in many caseslack accuracy, topicality and have not been linked to each othersystematically. These lead to many difficulties in accessing and extractinginformation for the implementation of management as well as for investorsand people with related interest. In this paper an advanced software hasbeen developed for the management of mineral resources and has beenapplied for Quang Ninh province. The software has improved thesupervision and administration of the mining operation in the province.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49006085","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}
The method of numerical simulation is widely used today tomanage the flow obtained from an oil/gas reservoir. However, thegeophysical data provided for the simulation program is unreliable, so thenumerical simulation results in large errors compared to reality. The paperpresents some methods for correcting geophysical data in numericalsimulation to obtain reliable simulation results.
{"title":"Methods of adjusting geophysical parameters in the calculation of numerical simulation of an oil and gas reservoir to obtain reliable simulation results","authors":"Phan Trong Toan","doi":"10.29227/im-2019-02-75","DOIUrl":"https://doi.org/10.29227/im-2019-02-75","url":null,"abstract":"The method of numerical simulation is widely used today tomanage the flow obtained from an oil/gas reservoir. However, thegeophysical data provided for the simulation program is unreliable, so thenumerical simulation results in large errors compared to reality. The paperpresents some methods for correcting geophysical data in numericalsimulation to obtain reliable simulation results.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49074467","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}
In underground mine ventilation, there are many causes affecting the efficiencyof mine ventilation, even affecting mine safety. In order to have an effective mine ventilationsystem, the research and evaluation of mine ventilation, in order to get timely solutions toimprove the efficiency of mine ventilation, is essential and must be done. regularly.Thanh Cong - Cao Thang coal mine area of Hon Gai Coal Company, Quang Ninh region, Vietnamis a mine exploited underground. The nature of this mine is the consolidation (connecting) ofThanh Cong areas and CaoThang areas in the period of 2016. After consolidation into Thanh Cong- Cao Thang mine, many factors in the mine ventilation system of The mine site is altered andaffects the efficiency of mine ventilation. This article has analyzed and evaluated the current statusof Thanh Cong - Cao Thang Area Ventilation System to help research and select appropriatesolutions to promptly improve the efficiency of mine ventilation and ensure security, ensure a safeenvironment and reduce the cost of mine ventilation.
{"title":"Assessing the current status of underground mine ventilation system in ThanhCong- CaoThang area, HonGai coal company, QuangNinh region, Vietnam","authors":"C. Nguyen, V. Nguyen, V. Nguyen","doi":"10.29227/IM-2019-02-56","DOIUrl":"https://doi.org/10.29227/IM-2019-02-56","url":null,"abstract":"In underground mine ventilation, there are many causes affecting the efficiencyof mine ventilation, even affecting mine safety. In order to have an effective mine ventilationsystem, the research and evaluation of mine ventilation, in order to get timely solutions toimprove the efficiency of mine ventilation, is essential and must be done. regularly.Thanh Cong - Cao Thang coal mine area of Hon Gai Coal Company, Quang Ninh region, Vietnamis a mine exploited underground. The nature of this mine is the consolidation (connecting) ofThanh Cong areas and CaoThang areas in the period of 2016. After consolidation into Thanh Cong- Cao Thang mine, many factors in the mine ventilation system of The mine site is altered andaffects the efficiency of mine ventilation. This article has analyzed and evaluated the current statusof Thanh Cong - Cao Thang Area Ventilation System to help research and select appropriatesolutions to promptly improve the efficiency of mine ventilation and ensure security, ensure a safeenvironment and reduce the cost of mine ventilation.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49536372","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}
Stopień wykorzystania czasu kalendarzowego ścianowego kompleksuwydobywczego zasadniczo wpływa na wydajność tego systemu technicznego i jego efektywnośćekonomiczną. W realizowanym w kompleksowo zmechanizowanym systemie ścianowym procesiewybierkowym czas, w którym kombajn ścianowy nie urabia jest, z punku widzenia efektywnościtego przodka, czasem straconym. W technologii wydobycia węgla zmechanizowanymikompleksami ścianowymi występują przerwy w urabianiu wywołane różnymi przyczynami, w tymkoniecznymi przerwami wynikającymi w technologii i własności urządzeń kompleksu ścianowego.W artykule przedstawiono strukturę czasu kalendarzowego ściany i poddano analizie źródławystępowania strat czasu efektywnego ściany czyli czasu w którym prowadzone jest urabianie.Wskazano przy tym na trzy podstawowe obszary występowania strat czasu efektywnego w czasiekalendarzowym czyli technologia górnicza, organizacja procesu wydobywczego i jakość orazfunkcjonalność wyposażenia technicznego kompleksu ścianowego.
{"title":"Efektywny czas pracy kompleksu ścianowego i przyczyny jego zmniejszania","authors":"J. Korski","doi":"10.29227/im-2019-02-55","DOIUrl":"https://doi.org/10.29227/im-2019-02-55","url":null,"abstract":"Stopień wykorzystania czasu kalendarzowego ścianowego kompleksuwydobywczego zasadniczo wpływa na wydajność tego systemu technicznego i jego efektywnośćekonomiczną. W realizowanym w kompleksowo zmechanizowanym systemie ścianowym procesiewybierkowym czas, w którym kombajn ścianowy nie urabia jest, z punku widzenia efektywnościtego przodka, czasem straconym. W technologii wydobycia węgla zmechanizowanymikompleksami ścianowymi występują przerwy w urabianiu wywołane różnymi przyczynami, w tymkoniecznymi przerwami wynikającymi w technologii i własności urządzeń kompleksu ścianowego.W artykule przedstawiono strukturę czasu kalendarzowego ściany i poddano analizie źródławystępowania strat czasu efektywnego ściany czyli czasu w którym prowadzone jest urabianie.Wskazano przy tym na trzy podstawowe obszary występowania strat czasu efektywnego w czasiekalendarzowym czyli technologia górnicza, organizacja procesu wydobywczego i jakość orazfunkcjonalność wyposażenia technicznego kompleksu ścianowego.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69824990","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}
Obudowa podporowo-kotwowa jest jedną z niewielu szans na obniżenie kosztówdrążenia wyrobisk przygotowawczych w polskich kopalniach węgla kamiennego. Zastosowanieobudowy kotwowej do wzmacniania górotworu i przykotwiania odrzwi umożliwia zarównozwiększenie podziałki obudowy podporowej, a więc ograniczenie zużycia stali, ale także obniżeniekosztów transportu do przodków, zmniejszenie obciążenia pracą załóg przodkowych i ścianowych.Opisany w artykule eksperyment został zrealizowany w LW Bogdanka S.A. i poległa narekordowym rozrzedzeniu obudowy w warunkach polskich bo aż do 1,5 m. W oparciuo doświadczenia Kopalni oraz analizy i obliczenia dobrano obudowę kotwową złożoną z dwóchsystemów kotwi wklejanych – prętowych i długich kotwi strunowych. Roboty realizowanew przodku były całkowicie zmechanizowane dzięki kombajnowi wyposażonemu w lawetęwiercąco-kotwiącą. W rezultacie osiągnięto postęp dobowy na poziomie 11,5 m na dobę. W trakciedrążenia, jak i utrzymywania wyrobiska przed frontem ściany prowadzono obserwacje i pomiary,które w znacznej mierze potwierdziły słuszność zastosowanej metody zabezpieczenia chodnika.
{"title":"Zastosowanie kotwi do rozrzedzania obudowy podporowej w warunkach głębokich kopalń węgla kamiennego – studium przypadku","authors":"Z. Rak, J. Stasica","doi":"10.29227/im-2019-02-81","DOIUrl":"https://doi.org/10.29227/im-2019-02-81","url":null,"abstract":"Obudowa podporowo-kotwowa jest jedną z niewielu szans na obniżenie kosztówdrążenia wyrobisk przygotowawczych w polskich kopalniach węgla kamiennego. Zastosowanieobudowy kotwowej do wzmacniania górotworu i przykotwiania odrzwi umożliwia zarównozwiększenie podziałki obudowy podporowej, a więc ograniczenie zużycia stali, ale także obniżeniekosztów transportu do przodków, zmniejszenie obciążenia pracą załóg przodkowych i ścianowych.Opisany w artykule eksperyment został zrealizowany w LW Bogdanka S.A. i poległa narekordowym rozrzedzeniu obudowy w warunkach polskich bo aż do 1,5 m. W oparciuo doświadczenia Kopalni oraz analizy i obliczenia dobrano obudowę kotwową złożoną z dwóchsystemów kotwi wklejanych – prętowych i długich kotwi strunowych. Roboty realizowanew przodku były całkowicie zmechanizowane dzięki kombajnowi wyposażonemu w lawetęwiercąco-kotwiącą. W rezultacie osiągnięto postęp dobowy na poziomie 11,5 m na dobę. W trakciedrążenia, jak i utrzymywania wyrobiska przed frontem ściany prowadzono obserwacje i pomiary,które w znacznej mierze potwierdziły słuszność zastosowanej metody zabezpieczenia chodnika.","PeriodicalId":44414,"journal":{"name":"Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69825090","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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