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Mining Technology-Transactions of the Institutions of Mining and Metallurgy最新文献

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Stability assessment of underground mine stopes subjected to stress relaxation 应力松弛作用下地下矿山采场稳定性评价
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726668.2020.1721995
A. Adoko, J. Vallejos, R. Trueman
{"title":"Stability assessment of underground mine stopes subjected to stress relaxation","authors":"A. Adoko, J. Vallejos, R. Trueman","doi":"10.1080/25726668.2020.1721995","DOIUrl":"https://doi.org/10.1080/25726668.2020.1721995","url":null,"abstract":"ABSTRACT Stress relaxation plays an important role in the design of underground stopes. The aim of this paper is to assess the stope stability in connection with the stress relaxation using a classification approach. Three types of stress relaxation were clearly defined, namely partial relaxation, tangential relaxation and full relaxation. A neural network classifier was implemented to assess the stability of the stopes on the basis of case histories of stope performances. The results of the classification were compared to existing empirical methods of quantifying the stress relaxation. Overall, the present study shows higher classification accuracies, especially when the stress relaxation was considered. The results suggested that the relaxation type can be a good predictor of stability. Relaxed stope (full and tangential stress relaxation) cases are the most critical in the sense that lower accuracies were obtained and the probability of correct classification is rather erratic.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"100 ","pages":"30 - 39"},"PeriodicalIF":1.1,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726668.2020.1721995","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72495279","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}
引用次数: 9
Ventilation air methane: a simulation of an optimised process of abatement with power and cooling 通风空气甲烷:模拟一个优化的过程与电力和冷却减排
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726668.2019.1704546
F. Nadaraju, A. Maddocks, J. Zanganeh, B. Moghtaderi
{"title":"Ventilation air methane: a simulation of an optimised process of abatement with power and cooling","authors":"F. Nadaraju, A. Maddocks, J. Zanganeh, B. Moghtaderi","doi":"10.1080/25726668.2019.1704546","DOIUrl":"https://doi.org/10.1080/25726668.2019.1704546","url":null,"abstract":"ABSTRACT Ventilation air methane is low concentration methane (below 1 vol. %) emitted from an underground coal mine. High ventilation air volumes circulated through the mine, ensure that the methane remains at a safe concentration. In 2016, the Australian Government reported fugitive emissions of methane from underground coal mines at approximately 19.0 million tonnes (CO2-equivalent) which was about 4.0% of Australia's national greenhouse gas emissions. Therefore, an optimised process of heat recovery from a fluidised-bed VAM abatement reactor, to produce power and cooling was studied. For a ventilation flow rate of 20 m3/s, the minimum methane concentration for a direct gas turbine was 0.45 vol. % at a reactor temperature of 630°C and compressor pressure of 1.5 bar. An indirect gas turbine process operated with a minimum methane concentration was 0.4 vol. % at a reactor temperature of 630°C, compressor pressure of 4.0 bar and turbine flow rate of 2.2 kg/s.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"187 1","pages":"21 - 9"},"PeriodicalIF":1.1,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79378600","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}
引用次数: 1
Towards sustainable mixed reality simulation for the mining industry 面向采矿业的可持续混合现实仿真
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-07-28 DOI: 10.1080/25726668.2019.1645519
P. Stothard, A. Squelch, R. Stone, E. V. van Wyk
{"title":"Towards sustainable mixed reality simulation for the mining industry","authors":"P. Stothard, A. Squelch, R. Stone, E. V. van Wyk","doi":"10.1080/25726668.2019.1645519","DOIUrl":"https://doi.org/10.1080/25726668.2019.1645519","url":null,"abstract":"ABSTRACT Twenty-first-century mining is a complex pursuit. Stakeholders must manage many interconnected processes and data sets to ensure an operation is sustainable. Mixed Reality (MR) simulation may present an opportunity to improve knowledge and understanding of mine operations via a digital twin. Current and future personnel can model and make predictions using past, current and future data sets. However, MR is still an uncommon tool in the mining industry. This paper asks why that is the case, what some common barriers may be to MR adoption, and presents a possible collaborative solution to make MR sustainable as the technology gains hold and becomes commonplace in mine operations and elsewhere.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"49 1","pages":"246 - 254"},"PeriodicalIF":1.1,"publicationDate":"2019-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89472605","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}
引用次数: 16
Energy efficiency overestimated by classic affinity laws: relation between volumetric flow rate and static pressure of an axial mine fan adjusted by a variable frequency driver 被经典亲和律高估的能效:变频驱动调节矿井轴流风机容积流量与静压的关系
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-06-19 DOI: 10.1080/25726668.2019.1631623
Feng Tian, Haiqiao Wang, Shi-qiang Chen, Zhulong Zhu
{"title":"Energy efficiency overestimated by classic affinity laws: relation between volumetric flow rate and static pressure of an axial mine fan adjusted by a variable frequency driver","authors":"Feng Tian, Haiqiao Wang, Shi-qiang Chen, Zhulong Zhu","doi":"10.1080/25726668.2019.1631623","DOIUrl":"https://doi.org/10.1080/25726668.2019.1631623","url":null,"abstract":"ABSTRACT A significant problem with operating a coal mine fan is finding ways to save energy while still maintaining the required air supply to working faces. The authors developed and tested the performance of a K45-4-№9/18.5 kW axial mine fan adjusted by a variable frequency driver set to different fractions of a typical national electric grid frequency of 50 Hz. Its volumetric flow-rate and static pressure (Q-H) data were fitted with fifth-order polynomial equations using least-squares regression. The extremes of the Q-H curves descend with decreasing frequency and differ significantly from the predictions of classic affinity laws (CAL) in fluid dynamics. The air-flow power predicted by CAL theory deviates from the baseline of the fifth-order polynomial extremes by a maximum of 48%. Interestingly, the deviation between theoretical and experimental values increases with decreasing power frequency. These results are evidence of the theoretical overestimation of energy efficiency of an AMF adjusted by a VFD.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"13 1","pages":"186 - 191"},"PeriodicalIF":1.1,"publicationDate":"2019-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77387666","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}
引用次数: 2
Importance of representative metallurgical sampling and testwork programmes to reduce project risk – a gold case study 具有代表性的冶金取样和测试工作方案对降低项目风险的重要性——一个黄金案例研究
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-06-19 DOI: 10.1080/25726668.2019.1628462
S. Dominy, Louisa O’Connor, Saranchimeg Purevgerel
{"title":"Importance of representative metallurgical sampling and testwork programmes to reduce project risk – a gold case study","authors":"S. Dominy, Louisa O’Connor, Saranchimeg Purevgerel","doi":"10.1080/25726668.2019.1628462","DOIUrl":"https://doi.org/10.1080/25726668.2019.1628462","url":null,"abstract":"ABSTRACT When developing a process flowsheet, the risks in achieving positive financial outcomes are minimised by ensuring representative metallurgical samples and quality testwork. A case study is presented based on an underground gold operation, where poor metallurgical sampling led to grade and recovery underperformance. Sampling-related issues included: poor liaison between geologists and metallurgists; poor domaining; too few metallurgical samples collected and tested; unrepresentative sample composites and sub-samples; poor laboratory practice; and a lack of documentation and QAQC. These issues led to disruption over four years and are estimated to have cost around US$115M in lost revenue and US$7.5M in corrective expenditure. After an initial characterisation programme, a variability mini-bulk sampling and testwork phase was undertaken. This was followed by a pilot programme, progressing to trial mining and production. The paper emphasises the need for fit for purpose metallurgical sampling and testwork, and the early application of variability sampling.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"20 1","pages":"230 - 245"},"PeriodicalIF":1.1,"publicationDate":"2019-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83670199","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}
引用次数: 4
Stress corrosion testing of roof bolt grade 60 steel in simulated underground coal mine atmosphere 60级钢锚杆在模拟煤矿井下环境中的应力腐蚀试验
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-05-21 DOI: 10.1080/25726668.2019.1616951
G. Bylapudi, A. Spearing, K. Mondal, A. Bhagwat
{"title":"Stress corrosion testing of roof bolt grade 60 steel in simulated underground coal mine atmosphere","authors":"G. Bylapudi, A. Spearing, K. Mondal, A. Bhagwat","doi":"10.1080/25726668.2019.1616951","DOIUrl":"https://doi.org/10.1080/25726668.2019.1616951","url":null,"abstract":"ABSTRACT Corrosion of roof bolts in underground mine environments could have an adverse impact on ground control, which is directly related to workforce safety. Past studies state that stress corrosion cracking (SCC) of roof bolts is a significant problem in underground coal mines, resulting in premature bolt failures. However, it has not been seriously studied in U.S. underground coal mines. As a preliminary study, the most common roof bolt material used in U.S. mines, ASTM A 615 Grade 60 steel, was studied under stress corrosion conditions. ASTM G30 standard was applied to achieve this and tested in the simulated coal mine conditions. SCC was observed on samples that were tested for 180 days. Chloride SCC (ClSCC) was found to be the corrosion mechanism resulting in cracks from the EDS data. This paper mainly discusses the test protocol, shortcomings of this preliminary testing and makes recommendations based on the observations and results.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"1 1","pages":"206 - 215"},"PeriodicalIF":1.1,"publicationDate":"2019-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82425489","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}
引用次数: 8
Ultrasonic inspection of flooded mineshafts for stability monitoring 水淹矿井稳定性监测的超声探伤
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-04-24 DOI: 10.1080/25726668.2019.1607459
M. D. Bedford, D. Gibson, J. Coggan, K. Siever, Aleksander Wrana, Dagmara Sobczak, Olaya Álvarez, C. Satterley
{"title":"Ultrasonic inspection of flooded mineshafts for stability monitoring","authors":"M. D. Bedford, D. Gibson, J. Coggan, K. Siever, Aleksander Wrana, Dagmara Sobczak, Olaya Álvarez, C. Satterley","doi":"10.1080/25726668.2019.1607459","DOIUrl":"https://doi.org/10.1080/25726668.2019.1607459","url":null,"abstract":"ABSTRACT Inspecting abandoned mine shafts is critical in ensuring their safety through early identification of signs of deterioration. Since the common inspection methods of CCTV and LiDAR are not very effective underwater, two modules have been designed for inspecting the linings of flooded, abandoned mine shafts. Using sonar technology, they allow the early stages of degradation to the lining to be detected which – since this could be indicative of imminent collapse – provides protection against the consequential risk to property and human life. Detailed measurements of several shafts’ cross-sections have been recorded using profiling and imaging sonar technology. Although imaging sonar provides very different results in the confined and reverberant environment of a mine shaft, compared to its more common environment of a seabed, it was shown that when combined with the profiling sonar, it allows shafts to be surveyed in a shorter period of time and improves the reliability of the profiling function.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"37 1","pages":"177 - 185"},"PeriodicalIF":1.1,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73566397","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}
引用次数: 0
Integrated optimisation of stope boundary and access layout for underground mining operations 地下开采采场边界与通道布置的综合优化
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-04-22 DOI: 10.1080/25726668.2019.1603920
Jie Hou, Chaoshui Xu, P. Dowd, Guoqing Li
{"title":"Integrated optimisation of stope boundary and access layout for underground mining operations","authors":"Jie Hou, Chaoshui Xu, P. Dowd, Guoqing Li","doi":"10.1080/25726668.2019.1603920","DOIUrl":"https://doi.org/10.1080/25726668.2019.1603920","url":null,"abstract":"ABSTRACT For underground mines, two major designs that need to be optimised are the stope boundary and the access layout. The optimisation of these two components cannot be done independently as ore extracted from stopes is transported to the surface via the access network. Different stope locations result in different associated access development costs. This paper describes a proposed integrated optimisation model to optimise stope and access layouts simultaneously. The interactions and interdependency between stopes and access are ensured by a dynamic access development cost analysis based on recursive computations. Mixed integer non-linear programming is used to maximise the overall economic value subject to the constraints of generating optimal stopes and access layout, which is solved by a Genetic Algorithm modified for computational efficiency. A stratiform gold deposit is used as a case study to demonstrate that the new approach can provide a more profitable solution compared with traditional approaches.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"20 4 1","pages":"193 - 205"},"PeriodicalIF":1.1,"publicationDate":"2019-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82905935","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}
引用次数: 8
Understanding, managing and communicating geomechanical mining risk 了解、管理和沟通地质力学采矿风险
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-04-09 DOI: 10.36487/ACG_REP/1905_0.1_HADJIGEORGIOU
J. Hadjigeorgiou
{"title":"Understanding, managing and communicating geomechanical mining risk","authors":"J. Hadjigeorgiou","doi":"10.36487/ACG_REP/1905_0.1_HADJIGEORGIOU","DOIUrl":"https://doi.org/10.36487/ACG_REP/1905_0.1_HADJIGEORGIOU","url":null,"abstract":"ABSTRACT Understanding, managing and communicating geomechanical mining risk is critical in supporting decisions at all levels of a mining company. This paper addresses how different risk analysis tools and procedures can be used effectively and brings attention to the limitations of some of the most popular tools. A strong case is made for a critical assessment of the effectiveness of risk-management tools. Finally, the paper discusses the challenges of understanding and communicating geomechanical mining risk, given the asymmetry of knowledge and information by decision-makers in mining companies.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"6 1","pages":"159 - 173"},"PeriodicalIF":1.1,"publicationDate":"2019-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76941626","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}
引用次数: 9
Clustering mining blocks in presence of geological uncertainty 地质不确定性下的矿区聚类
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2019-03-27 DOI: 10.1080/25726668.2019.1596425
M. Tabesh, H. Askari-Nasab
{"title":"Clustering mining blocks in presence of geological uncertainty","authors":"M. Tabesh, H. Askari-Nasab","doi":"10.1080/25726668.2019.1596425","DOIUrl":"https://doi.org/10.1080/25726668.2019.1596425","url":null,"abstract":"ABSTRACT A major trend in mine production planning research is incorporating geological uncertainty in the processes of planning. Many mathematical models and heuristic approaches are proposed to deal with the uncertainty. Although there have been advances in exact methods to solve simpler instances of the mine production scheduling problem more complex instances of the model, especially when incorporating uncertainty, remain intractable and aggregation of blocks can help to decrease solution times. In this paper, we present four variations of the agglomerative hierarchical clustering algorithm, one based on deterministic estimates of properties and three based on possible worlds approach which use Geostatistical realizations to form aggregates with regard to the geological properties and the existing uncertainties. We show, through case studies, that uncertainty-based algorithms can result in aggregates that are less susceptible to uncertainties, and at the same time, the proposed algorithm can produce aggregates that are within a controlled size and have minable shapes.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"8 1","pages":"162 - 176"},"PeriodicalIF":1.1,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82689568","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}
引用次数: 11
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