Objectives: To observe the surgical outcome of type 1 tympanoplasty in paediatric patients in the form of graft uptake and audiological improvement. Materials and methods: A prospective study was done in which 40 paediatric patients in age group 6-16 years, diagnosed of chronic otitis media, were taken up for tympanoplasty under general anaesthesia. Patients were followed in post operative period at 4, 6 and 12 weeks for assessment of graft status and audiological evaluation. Results: In this study, we found surgical success rate in the form of graft uptake in 80% of the cases and audiological improvement in 75% of the cases. Conclusion: Tympanoplasty is safe and effective in children with adequate graft uptake and audiological outcome.
Supplementary information: The online version contains supplementary material available at 10.1007/s12070-023-03965-1.
{"title":"Surgical Outcomes of Type 1 Tympanoplasty in Chronic Otitis Media in Paediatric Patients: A Prospective Study.","authors":"Harsimran Bhatti, Khushboo Goel, Sanjeev Bhagat, Dinesh Kumar Sharma, Vishav Yadav, Ankita Aggarwal","doi":"10.1007/s12070-023-03965-1","DOIUrl":"10.1007/s12070-023-03965-1","url":null,"abstract":"<p><p>Objectives: To observe the surgical outcome of type 1 tympanoplasty in paediatric patients in the form of graft uptake and audiological improvement. Materials and methods: A prospective study was done in which 40 paediatric patients in age group 6-16 years, diagnosed of chronic otitis media, were taken up for tympanoplasty under general anaesthesia. Patients were followed in post operative period at 4, 6 and 12 weeks for assessment of graft status and audiological evaluation. Results: In this study, we found surgical success rate in the form of graft uptake in 80% of the cases and audiological improvement in 75% of the cases. Conclusion: Tympanoplasty is safe and effective in children with adequate graft uptake and audiological outcome.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s12070-023-03965-1.</p>","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"29 1","pages":"3421-3426"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10645835/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82103535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-17DOI: 10.1080/17480930.2023.2276572
K. Hashiba, K. Fukui
Rotary percussion rock drills have been widely used in mining and civil engineering fields, and their performance needs to be further improved. To deeply understand the mechanisms of the rock drill...
旋回冲击凿岩机已广泛应用于矿山和土木工程领域，其性能有待进一步提高。为了深入了解凿岩机的工作原理…
{"title":"Review of theoretical, experimental, and numerical studies on rotary percussive rock drilling","authors":"K. Hashiba, K. Fukui","doi":"10.1080/17480930.2023.2276572","DOIUrl":"https://doi.org/10.1080/17480930.2023.2276572","url":null,"abstract":"Rotary percussion rock drills have been widely used in mining and civil engineering fields, and their performance needs to be further improved. To deeply understand the mechanisms of the rock drill...","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"46 6","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138526623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-16DOI: 10.1080/17480930.2023.2281201
Asif Khan, Mohammad Waqar Ali Asad, Erkan Topal
A mathematical model for production scheduling of open pit mines maximises the net present value and satisfies the reserves, pit slope angle, and production capacity constraints. A solution to this...
{"title":"A heuristic method for production scheduling of an open pit mining operation","authors":"Asif Khan, Mohammad Waqar Ali Asad, Erkan Topal","doi":"10.1080/17480930.2023.2281201","DOIUrl":"https://doi.org/10.1080/17480930.2023.2281201","url":null,"abstract":"A mathematical model for production scheduling of open pit mines maximises the net present value and satisfies the reserves, pit slope angle, and production capacity constraints. A solution to this...","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"44 6","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-09DOI: 10.1080/17480930.2023.2260592
N. Aghazamani, J. Scalia, C.A. Bareither
ABSTRACTUncertainty exists as to the role of placement conditions of filtered tailings on water retention behaviour. In this study, we measured 12 drying and 12 wetting soil water characteristic curves on two filtered tailings with various initial gravimetric water contents and dry densities. Filtered tailings at ≥90% standard Proctor maximum dry density maintained higher degrees of saturation under suctions between 15 and 600 kPa, when compared to loosely placed (80% compaction) filtered tailings. Similarly, filtered tailings compacted wet of optimum maintained higher saturations under suctions between 15 and 600 kPa compared with filtered tailings compacted at optimum water content.KEYWORDS: Filtered tailingshysteresisminingsoil water characteristic curve, tailings AcknowledgmentsThe authors also acknowledge the mines that provided filtered tailings samples for this study.Disclosure statementNo potential conflict of interest was reported by the author(s).Supplementary materialSupplemental data for this article can be accessed online at https://doi.org/10.1080/17480930.2023.2260592Additional informationFundingFinancial support for this work was provided via graduate funding for the lead author by the Tailings and Mine Waste Conference Committee.
{"title":"Effect of placement water content and dry density on water retention behaviour of filtered tailings","authors":"N. Aghazamani, J. Scalia, C.A. Bareither","doi":"10.1080/17480930.2023.2260592","DOIUrl":"https://doi.org/10.1080/17480930.2023.2260592","url":null,"abstract":"ABSTRACTUncertainty exists as to the role of placement conditions of filtered tailings on water retention behaviour. In this study, we measured 12 drying and 12 wetting soil water characteristic curves on two filtered tailings with various initial gravimetric water contents and dry densities. Filtered tailings at ≥90% standard Proctor maximum dry density maintained higher degrees of saturation under suctions between 15 and 600 kPa, when compared to loosely placed (80% compaction) filtered tailings. Similarly, filtered tailings compacted wet of optimum maintained higher saturations under suctions between 15 and 600 kPa compared with filtered tailings compacted at optimum water content.KEYWORDS: Filtered tailingshysteresisminingsoil water characteristic curve, tailings AcknowledgmentsThe authors also acknowledge the mines that provided filtered tailings samples for this study.Disclosure statementNo potential conflict of interest was reported by the author(s).Supplementary materialSupplemental data for this article can be accessed online at https://doi.org/10.1080/17480930.2023.2260592Additional informationFundingFinancial support for this work was provided via graduate funding for the lead author by the Tailings and Mine Waste Conference Committee.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":" 38","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135242745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.1080/17480930.2023.2278013
Haiming Bao, Peter Knights, Mehmet Kizil, Micah Nehring
ABSTRACTThe mining sector is facing an immediate challenge to reduce its carbon emissions. The movement of material with mining truck fleets is a critical factor in reducing emissions. As the industry gradually replaces diesel trucks with more environmentally friendly transportation systems, it is important to analyse new solutions. This paper presents a new type of mining truck fleet called the Battery Trolley system, which is a combination of advanced technologies, including a battery-electric drivetrain, autonomy, trolley assist, and energy recovery systems. Depending on the site-specific differences and technology adoptions, decision-makers have three Battery Trolley system configurations to choose from: dynamic charging, stationary charging, and dual trolley Battery Trolley systems, each of which has its own advantages and disadvantages. One of the challenges of using Battery Trolley systems is their capacity and productivity. This study uses open-accessible project parameters and databases, with engineering assumptions, to create a mining scenario for both the dynamic charging and stationary charging perspectives. The study provides an equation to evaluate the Battery Trolley system’s mining productivity. Results show an incremental analysis of the Battery Trolley productivity as the trolley power increases from 8 MW to 32 MW in various Battery Trolley configurations. The study compares the Battery Trolley productivity for several open-pit mining applications, including copper, iron, and overburden waste. The results indicate that: (i) trolley power limitations significantly affect the capacity of Battery Trolley systems; (ii) a stationary charging option can achieve higher capacity and productivity than dynamic charging; (iii) Battery Trolley productivity varies in different applications under the given simulation assumptions.KEYWORDS: DecarbonisationBattery TrolleyBattery-electric trucksElectrificationMining capacity and productivity Disclosure statementNo potential conflict of interest was reported by the authors.
{"title":"Productivity estimation of battery trolley mining truck fleets","authors":"Haiming Bao, Peter Knights, Mehmet Kizil, Micah Nehring","doi":"10.1080/17480930.2023.2278013","DOIUrl":"https://doi.org/10.1080/17480930.2023.2278013","url":null,"abstract":"ABSTRACTThe mining sector is facing an immediate challenge to reduce its carbon emissions. The movement of material with mining truck fleets is a critical factor in reducing emissions. As the industry gradually replaces diesel trucks with more environmentally friendly transportation systems, it is important to analyse new solutions. This paper presents a new type of mining truck fleet called the Battery Trolley system, which is a combination of advanced technologies, including a battery-electric drivetrain, autonomy, trolley assist, and energy recovery systems. Depending on the site-specific differences and technology adoptions, decision-makers have three Battery Trolley system configurations to choose from: dynamic charging, stationary charging, and dual trolley Battery Trolley systems, each of which has its own advantages and disadvantages. One of the challenges of using Battery Trolley systems is their capacity and productivity. This study uses open-accessible project parameters and databases, with engineering assumptions, to create a mining scenario for both the dynamic charging and stationary charging perspectives. The study provides an equation to evaluate the Battery Trolley system’s mining productivity. Results show an incremental analysis of the Battery Trolley productivity as the trolley power increases from 8 MW to 32 MW in various Battery Trolley configurations. The study compares the Battery Trolley productivity for several open-pit mining applications, including copper, iron, and overburden waste. The results indicate that: (i) trolley power limitations significantly affect the capacity of Battery Trolley systems; (ii) a stationary charging option can achieve higher capacity and productivity than dynamic charging; (iii) Battery Trolley productivity varies in different applications under the given simulation assumptions.KEYWORDS: DecarbonisationBattery TrolleyBattery-electric trucksElectrificationMining capacity and productivity Disclosure statementNo potential conflict of interest was reported by the authors.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"22 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135868253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.1080/17480930.2023.2273030
Andrew Pan, Murray Grabinsky
ABSTRACTMine stopes are often characterised by near-saturate conditions from constant water inflow from the ore body. Although significant research has been conducted on mechanical properties of cemented paste backfill, there are limited studies on curing practices that reflect saturate conditions. This study examines the effects of submerged curing to simulate saturate conditions. The results indicate that observed dark grey colouration associated with submerged curing is similar to ‘greening effect’ observed in concrete material containing Ground Granulated Blast-furnace Slag. Our study indicates that submerged curing has limited adverse material effects and is effective in simulating near-saturated conditions.KEYWORDS: Submerged curinggreening effectcemented paste backfillpetrographic microscopy AcknowledgmentsThe research methodology stems from the advanced microscopy course at the University of Toronto CIV1262: Microscopy Applied to Building and Geomaterials. We would also like to thank Professor Karl Peterson and Ekaterina Ossetchkina for their expertise assistance with the analysis and interpretation and Alistair Mascarenhas for lab support. We would like to acknowledge Agnico Eagle Mines for provision of materials and insights into mining practices.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Mitechs Accelerated Program; Agnico Eagle Mines; Queen Elizabeth II: Paul and Suzana Price Scholarship in Science and Technology Award.
{"title":"Effect of submerged curing on properties of cemented paste backfill","authors":"Andrew Pan, Murray Grabinsky","doi":"10.1080/17480930.2023.2273030","DOIUrl":"https://doi.org/10.1080/17480930.2023.2273030","url":null,"abstract":"ABSTRACTMine stopes are often characterised by near-saturate conditions from constant water inflow from the ore body. Although significant research has been conducted on mechanical properties of cemented paste backfill, there are limited studies on curing practices that reflect saturate conditions. This study examines the effects of submerged curing to simulate saturate conditions. The results indicate that observed dark grey colouration associated with submerged curing is similar to ‘greening effect’ observed in concrete material containing Ground Granulated Blast-furnace Slag. Our study indicates that submerged curing has limited adverse material effects and is effective in simulating near-saturated conditions.KEYWORDS: Submerged curinggreening effectcemented paste backfillpetrographic microscopy AcknowledgmentsThe research methodology stems from the advanced microscopy course at the University of Toronto CIV1262: Microscopy Applied to Building and Geomaterials. We would also like to thank Professor Karl Peterson and Ekaterina Ossetchkina for their expertise assistance with the analysis and interpretation and Alistair Mascarenhas for lab support. We would like to acknowledge Agnico Eagle Mines for provision of materials and insights into mining practices.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Mitechs Accelerated Program; Agnico Eagle Mines; Queen Elizabeth II: Paul and Suzana Price Scholarship in Science and Technology Award.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135868410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-30DOI: 10.1080/17480930.2023.2270301
Austin Zabel, Scott J Ketcheson, Richard M Petrone
{"title":"Climatic controls on the water balance of a pilot-scale oil sands mining pit lake in the Athabasca oil sands region, Canada","authors":"Austin Zabel, Scott J Ketcheson, Richard M Petrone","doi":"10.1080/17480930.2023.2270301","DOIUrl":"https://doi.org/10.1080/17480930.2023.2270301","url":null,"abstract":"","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"17 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136104164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACTThe Mohr-Coulomb elastoplastic model is extensively employed in geotechnical engineering. Despite the well-known nonlinear behaviour of granular cohesionless materials under a wide range of normal stress or confining pressure, the Mohr-Coulomb elastoplastic model continues to be largely used in geotechnical engineering, due to its simplicity and large availability in numerous commercialised software. Its application requires the input of a key parameter, named Poisson’s ratio. It is however a big challenge as its value changes with axial strain and confining pressure. In this study, the optimal Poisson’s ratio of granular materials for the Mohr-Coulomb elastoplastic model is determined by reproducing the experimental results of stress-strain relationships through numerical modelling with the Mohr-Coulomb elastoplastic model. The results show that the Poisson’s ratio μ0.02, corresponding to the slope of the volumetric strain against axial strain curve at 2% of the peak deviatoric stress can be used in numerical modelling with the Mohr-Coulomb elastoplastic model as long as the granular material does not exhibit dilation behaviour. When the material exhibits dilation behaviour, the Poisson’s ratio μ0.36, corresponding to the slope of the volumetric strain against axial strain curve at 36% of the peak deviatoric stress, seems to be appropriate in numerical modelling with the Mohr-Coulomb elastoplastic model. In addition, the study also shows that the Mohr-Coulomb elastoplastic model can be used to simulate mechanical behaviour of granular material under small strain, but not appropriate under large strain conditions.KEYWORDS: Mohr-Coulomb modelPoisson’s ratiogranular materialscohesionless sandstriaxial compression testnumerical modellingstability and reliability of numerical modelling Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the Young Scientist Project of the National Key Research and Development Program of China [No. 2021YFC2900600]; Beijing Nova Program [No. 20220484057]; China Scholarship Council [No. 202010300001]; Natural Sciences and Engineering Research Council of Canada [RGPIN-2018-06902 and ALLRP 566888-21].
{"title":"Poisson’s ratio of granular materials for Mohr-Coulomb elastoplastic model","authors":"Chuan Fan, Pengyu Yang, Li Li, Ruofan Wang, Guangsheng Liu, Xiaocong Yang, Weidong Song, Lijie Guo","doi":"10.1080/17480930.2023.2260589","DOIUrl":"https://doi.org/10.1080/17480930.2023.2260589","url":null,"abstract":"ABSTRACTThe Mohr-Coulomb elastoplastic model is extensively employed in geotechnical engineering. Despite the well-known nonlinear behaviour of granular cohesionless materials under a wide range of normal stress or confining pressure, the Mohr-Coulomb elastoplastic model continues to be largely used in geotechnical engineering, due to its simplicity and large availability in numerous commercialised software. Its application requires the input of a key parameter, named Poisson’s ratio. It is however a big challenge as its value changes with axial strain and confining pressure. In this study, the optimal Poisson’s ratio of granular materials for the Mohr-Coulomb elastoplastic model is determined by reproducing the experimental results of stress-strain relationships through numerical modelling with the Mohr-Coulomb elastoplastic model. The results show that the Poisson’s ratio μ0.02, corresponding to the slope of the volumetric strain against axial strain curve at 2% of the peak deviatoric stress can be used in numerical modelling with the Mohr-Coulomb elastoplastic model as long as the granular material does not exhibit dilation behaviour. When the material exhibits dilation behaviour, the Poisson’s ratio μ0.36, corresponding to the slope of the volumetric strain against axial strain curve at 36% of the peak deviatoric stress, seems to be appropriate in numerical modelling with the Mohr-Coulomb elastoplastic model. In addition, the study also shows that the Mohr-Coulomb elastoplastic model can be used to simulate mechanical behaviour of granular material under small strain, but not appropriate under large strain conditions.KEYWORDS: Mohr-Coulomb modelPoisson’s ratiogranular materialscohesionless sandstriaxial compression testnumerical modellingstability and reliability of numerical modelling Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the Young Scientist Project of the National Key Research and Development Program of China [No. 2021YFC2900600]; Beijing Nova Program [No. 20220484057]; China Scholarship Council [No. 202010300001]; Natural Sciences and Engineering Research Council of Canada [RGPIN-2018-06902 and ALLRP 566888-21].","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"283 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135413713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-14DOI: 10.1080/17480930.2023.2269345
WeeKiet Ting, Alsidqi Hasan
ABSTRACTCemented Paste Backfill (CPB) undergoes transient changes in stress behaviour during curing, influenced by geothermal gradient and cement hydration. This study explores CPB’s response to temperature variations in a semi-confined narrow wall, simulating mining stope conditions. The results revealed that arching effects restricts vertical expansion of CPB slurry leading to temperature-induced thermal stress that often exceeding total stress estimation. Temperature change at different stage of backfill resulted in different level of stress generated due to the material state. These findings suggest the need to consider thermal behaviour in the relevant designs to improve safety in the mining industry.KEYWORDS: Mine stopecemented paste backfillnarrow walltemperaturearching effect AcknowledgmentsThe authors would also like to acknowledge, as well as the technical support and facilities provided by the Geotechnical Engineering Laboratory, The Department of Civil Engineering, University of Malaysia Sarawak.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe data that support the findings of this study are available from the corresponding author, Alsidqi Hasan, upon reasonable request.Additional informationFundingThis research is financially supported by Fundamental Research Grant Scheme (no. FRGS/1/2023/TK06/UNIMAS/02/2 with a title: Behavior of thermal contraction on cemented paste backfill in mine stope, by the Ministry of Higher Education Malaysia.
{"title":"Stress behaviour of cemented paste backfill within temperature controlled stope model","authors":"WeeKiet Ting, Alsidqi Hasan","doi":"10.1080/17480930.2023.2269345","DOIUrl":"https://doi.org/10.1080/17480930.2023.2269345","url":null,"abstract":"ABSTRACTCemented Paste Backfill (CPB) undergoes transient changes in stress behaviour during curing, influenced by geothermal gradient and cement hydration. This study explores CPB’s response to temperature variations in a semi-confined narrow wall, simulating mining stope conditions. The results revealed that arching effects restricts vertical expansion of CPB slurry leading to temperature-induced thermal stress that often exceeding total stress estimation. Temperature change at different stage of backfill resulted in different level of stress generated due to the material state. These findings suggest the need to consider thermal behaviour in the relevant designs to improve safety in the mining industry.KEYWORDS: Mine stopecemented paste backfillnarrow walltemperaturearching effect AcknowledgmentsThe authors would also like to acknowledge, as well as the technical support and facilities provided by the Geotechnical Engineering Laboratory, The Department of Civil Engineering, University of Malaysia Sarawak.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe data that support the findings of this study are available from the corresponding author, Alsidqi Hasan, upon reasonable request.Additional informationFundingThis research is financially supported by Fundamental Research Grant Scheme (no. FRGS/1/2023/TK06/UNIMAS/02/2 with a title: Behavior of thermal contraction on cemented paste backfill in mine stope, by the Ministry of Higher Education Malaysia.","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135803268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-10DOI: 10.1080/17480930.2023.2263264
Václav Zubíček, Vlastimil Hudeček, Lucie Orlíková, Rostislav Dandoš, Petr Jadviščok, Vancho Adjiski, Dagmara Dlouhá
ABSTRACTAs relict features of coal mines, carbonaceous spoil, waste and tailing dumps remain susceptible to coal oxidation and thermal decomposition, together with spontaneous combustion. Modern methods for monitoring surface thermal signatures regularly include the use of UAV’s, equipped with suitably sensitive infrared cameras. Detection of sub-surface thermal anomalism includes Vegetation Index Monitoring and/or the use of in-ground probes. Research across thermally active tailings offers insights into how best apply these two techniques, and increasingly the required scheduling of UAV surveys.KEYWORDS: UAVtemperature monitoringvegetation indexthermal activity Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Thermal signatures of relict coal spoil, waste and tailing dumps","authors":"Václav Zubíček, Vlastimil Hudeček, Lucie Orlíková, Rostislav Dandoš, Petr Jadviščok, Vancho Adjiski, Dagmara Dlouhá","doi":"10.1080/17480930.2023.2263264","DOIUrl":"https://doi.org/10.1080/17480930.2023.2263264","url":null,"abstract":"ABSTRACTAs relict features of coal mines, carbonaceous spoil, waste and tailing dumps remain susceptible to coal oxidation and thermal decomposition, together with spontaneous combustion. Modern methods for monitoring surface thermal signatures regularly include the use of UAV’s, equipped with suitably sensitive infrared cameras. Detection of sub-surface thermal anomalism includes Vegetation Index Monitoring and/or the use of in-ground probes. Research across thermally active tailings offers insights into how best apply these two techniques, and increasingly the required scheduling of UAV surveys.KEYWORDS: UAVtemperature monitoringvegetation indexthermal activity Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":49180,"journal":{"name":"International Journal of Mining Reclamation and Environment","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136356532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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