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

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Computer-aided design of rational parameters for the location of blasthole charges in horizontal underground development 地下水平开发炮眼就位合理参数的计算机辅助设计
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2022-01-02 DOI: 10.1080/25726668.2021.1977903
B. Rakishev, A. Orynbay, A. B. Mussakhan, A. I. Tuktibayev
{"title":"Computer-aided design of rational parameters for the location of blasthole charges in horizontal underground development","authors":"B. Rakishev, A. Orynbay, A. B. Mussakhan, A. I. Tuktibayev","doi":"10.1080/25726668.2021.1977903","DOIUrl":"https://doi.org/10.1080/25726668.2021.1977903","url":null,"abstract":"ABSTRACT The article substantiates a stage-by-stage physical model of destruction of a real rock mass. On its basis, the key results of an explosion in a solid medium were determined: the strength characteristic of rocks under conditions of all-round explosive loading, the relative limiting radius of the blast cavity, the radii of the zones of fine crushing and radial cracks, and the principle of the rational arrangement of charges in the blasted block was formulated. Using this principle, an analytical method has been developed for determining the rational parameters of the location of charges in the face of preparatory workings and their computer-aided design. Experimental explosions carried out in the underground mines of Kazakhmys Corporation LLP confirmed the operability of the proposed automated design of drilling and blasting operations in horizontal underground workings. The proposed results are in good agreement with the data presented in the works of a number of world authors.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"21 1","pages":"25 - 37"},"PeriodicalIF":1.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89130791","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
A hybrid extraction level layout design for block caving 块状崩落开采混合抽采水平布置设计
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2022-01-02 DOI: 10.1080/25726668.2021.1992980
Rene Le-Feaux, R. Castro, D. Cortez, R. Gómez, Diego Silva
{"title":"A hybrid extraction level layout design for block caving","authors":"Rene Le-Feaux, R. Castro, D. Cortez, R. Gómez, Diego Silva","doi":"10.1080/25726668.2021.1992980","DOIUrl":"https://doi.org/10.1080/25726668.2021.1992980","url":null,"abstract":"ABSTRACT The most widely used production level layouts in block cave mines have been the El Teniente and Herringbone. However, these patterns face some challenges that can be improved, such as reducing LHD cycle times, improved pillar geometries for a better production level stability and enhancements in time and cost during construction. In that context, this work proposes a hybrid extraction level design for Block Caving, integrating productivity and geometry to achieve a balance based on experience and theory. A methodology is proposed to compare with El Teniente layout in terms of constructability, ground support, and main operational parameters. The results indicate that a hybrid layout offers advantages compared to the El Teniente layout based on the area and input variables analysed. Although further studies are recommended for industrial validation, the results obtained here show that the proposed layout is feasible and has the potential to be applied in block cave mining.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"12 1 Suppl 1 1","pages":"51 - 65"},"PeriodicalIF":1.1,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80398426","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
Effect of temperature variation on the behaviour of Bushveld rocks: comparison of laboratory test and numerical modelling results 温度变化对Bushveld岩石行为的影响:实验室试验和数值模拟结果的比较
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-10-02 DOI: 10.1080/25726668.2021.1985885
G. Oniyide, H. Yilmaz, E. Nordlund
{"title":"Effect of temperature variation on the behaviour of Bushveld rocks: comparison of laboratory test and numerical modelling results","authors":"G. Oniyide, H. Yilmaz, E. Nordlund","doi":"10.1080/25726668.2021.1985885","DOIUrl":"https://doi.org/10.1080/25726668.2021.1985885","url":null,"abstract":"ABSTRACT This paper presents the result of the research carried out on the effect of temperature on the Bushveld Igneous Complex (BIC), South Africa. The BIC has high virgin rock temperature. If the platinum mines advance to ultra-deep levels, then the virgin rock temperature at a depth of 5 km will be approximately 140°C. Hence, there is a need to improve the understanding of the behaviour of rock under high temperatures. Five rock types were tested in a 2600 kN servo-controlled testing machine. The testing was done at a controlled loading rate and a confining pressure 0, 10, and 30 MPa within temperature range of 20–140°C. Comparison was made between the results obtained from the laboratory experiments and numerical modelling. It was observed from the stress–strain behaviour of the samples that an increase in temperature results in the reduction of the Young’s modulus and peak strength.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"3 1","pages":"195 - 208"},"PeriodicalIF":1.1,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82105629","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
Design of blasting patterns to induce effective caving in continuous miner depillaring panel – a case study 煤矿连续脱柱盘有效崩落爆破模式设计——以煤矿连续脱柱盘为例
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-10-02 DOI: 10.1080/25726668.2021.1959750
P. Pal Roy, C. Sawmliana, R. Singh
{"title":"Design of blasting patterns to induce effective caving in continuous miner depillaring panel – a case study","authors":"P. Pal Roy, C. Sawmliana, R. Singh","doi":"10.1080/25726668.2021.1959750","DOIUrl":"https://doi.org/10.1080/25726668.2021.1959750","url":null,"abstract":"ABSTRACT An innovative scheme of induced caving by blasting was adopted in the depillaring continuous miner panel CM1 of Jhanjra Colliery of Eastern Coalfields Limited, a subsidiary of Coal India Limited. Initially, the blasting pattern was designed with respect to underground workings and later with respect to the surface, vertically above the panel, to facilitate effective caving. The natural caving was delayed due to the presence of three hard-rock beds of more than 5000 cavability index in the immediate roof of the R-VI seam in addition to the oversized left-out standing pillars kept during coal extraction in the panel, which provided extra supports to the hanging roof-rock in the goaf. To mitigate the situation, the design parameters were meticulously planned and implemented for successful blasting operations, which led to effective caving in the goaf and enabled successful extraction of the coal from the panel maintaining the required level of safety and productivity.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"29 1","pages":"209 - 220"},"PeriodicalIF":1.1,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74576263","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
Effect of initial specimen height and solids concentration on the consolidation parameters of fine-grained coal tailings 初始试样高度和固体浓度对细粒尾砂固结参数的影响
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-10-02 DOI: 10.1080/25726668.2021.1957539
S. Islam, David J. Williams, Chenming Zhang
{"title":"Effect of initial specimen height and solids concentration on the consolidation parameters of fine-grained coal tailings","authors":"S. Islam, David J. Williams, Chenming Zhang","doi":"10.1080/25726668.2021.1957539","DOIUrl":"https://doi.org/10.1080/25726668.2021.1957539","url":null,"abstract":"ABSTRACT Proper understanding and analysis of the consolidation behaviour and parameters of tailings from a slurry-like to a soil-like state are vital for the design, management, and assessment of a tailings storage facility (TSF). Fine-grained coal tailings slurry can undergo relatively rapid and substantial settlement from a slurried state and can experience relatively slow and limited self-weight consolidation, remaining slurry-like and under-consolidated, rather than soil-like. A large purpose-built slurry consolidometer having a newly developed consolidometer cell, instrumented with load cells and pore water pressure transducers, is well-suited to test tailings from a slurry-like to a soil-like state and enables the constant rate of loading (CRL) to simulate the build-up of tailings. CRL is more representative of the rate of rise of tailings in a TSF than incremental step loading. By conducting consolidation tests on fine-grained coal tailings from a slurry-state under a loading rate of 0.12 kPa/min up to applied stress of 320 kPa, this research investigated the effect of initial specimen height (ISH) and initial solids concentration (ISC) on consolidation parameters and hydraulic conductivity. Using ISH and ISC as independent inputs, a statistical model has been proposed to estimate the consolidation settlement at the end of the slurry consolidation test.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"2 1","pages":"244 - 256"},"PeriodicalIF":1.1,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89552832","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
Procedure for estimating broken ore density distribution within a draw column during block caving 块状崩落时放矿柱内破碎矿密度分布估计程序
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-07-03 DOI: 10.1080/25726668.2021.1886544
L. Dorador, E. Eberhardt, D. Elmo
{"title":"Procedure for estimating broken ore density distribution within a draw column during block caving","authors":"L. Dorador, E. Eberhardt, D. Elmo","doi":"10.1080/25726668.2021.1886544","DOIUrl":"https://doi.org/10.1080/25726668.2021.1886544","url":null,"abstract":"ABSTRACT Broken ore density (BOD) is an important parameter in planning a block cave mine. However, its assessment is complicated by the heterogeneous nature of its distribution within a draw column, varying from a denser central plug-flow zone and decreasing outwards towards outer perimeter shear bands. The BOD further decreases immediately above the drawpoint due to the development of a loosening zone that develops in response to mucking. This makes determining BOD a challenging task, hindered by the inability to measure it in situ. To address this, several key factors influencing BOD are investigated including the influence of primary and secondary fragmentation, air gap thickness, draw rate and column height. Data is used to link primary and secondary fragmentation to broken ore size distributions. From these, a conceptual framework and empirical procedures are presented for evaluating BOD within draw columns during block caving for feasibility and early stage mine planning and design.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"1 1","pages":"131 - 145"},"PeriodicalIF":1.1,"publicationDate":"2021-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89702341","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
Measuring blast fragmentation at Nui Phao open-pit mine, Vietnam using the Mask R-CNN deep learning model 使用Mask R-CNN深度学习模型测量越南Nui phhao露天矿的爆炸碎片
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-06-30 DOI: 10.1080/25726668.2021.1944458
Trong Vu, T. Bao, Q. Hoang, Carsten Drebenstetd, Pham Van Hoa, Hoang Hung Thang
{"title":"Measuring blast fragmentation at Nui Phao open-pit mine, Vietnam using the Mask R-CNN deep learning model","authors":"Trong Vu, T. Bao, Q. Hoang, Carsten Drebenstetd, Pham Van Hoa, Hoang Hung Thang","doi":"10.1080/25726668.2021.1944458","DOIUrl":"https://doi.org/10.1080/25726668.2021.1944458","url":null,"abstract":"ABSTRACT Blast fragmentation size distribution is one of the most critical factors in evaluating the blasting results and affecting the downstream mining and processing operations in open-pit mines. Image-based methods are widely applied to address the problem but require heavy user interaction and experience. This study deployed a deep learning model Mask R-CNN to develop an automatic measurement method of blast fragmentation. The model was trained using images captured from real blasting sites in Nui Phao open-pit mine in Vietnam. The trained model reported high average precision scores (Intersection over Union, IoU = 0.5) 92% and 83% for bounding box and segmentation masks, respectively. The results lay a solid technical basis for the automated measurement of blast fragmentation in open-pit mines.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"4 1","pages":"232 - 243"},"PeriodicalIF":1.1,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79693066","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
Non-deterministic load and dump behaviour in mining haul trucks: a case of study 矿用运输卡车的非确定性装载和倾卸行为:一个案例研究
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-06-11 DOI: 10.1080/25726668.2021.1937455
R. C. Barbosa, Carlos E. P. Ortiz, A. Curi
{"title":"Non-deterministic load and dump behaviour in mining haul trucks: a case of study","authors":"R. C. Barbosa, Carlos E. P. Ortiz, A. Curi","doi":"10.1080/25726668.2021.1937455","DOIUrl":"https://doi.org/10.1080/25726668.2021.1937455","url":null,"abstract":"ABSTRACT Complex load and haul cycles in mining are composed of individual steps, whose times could be better described by a statistical distribution than by the average value. In order to evaluate how loading times and dumping times behave, this paper tested a large dataset of loading and dumping times measured at an open pit limestone mine in Brazil against the distributions most commonly used to model these variables, Log-normal and Normal; as well as Gamma, Logistic, Weibull and Exponential distributions. None of the tested distributions provided statistically significant adherence to the data, but it was possible to identify that for most equipment, Logistic and Normal distributions would produce less error on stochastic modelling then the other tested distributions.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"30 1","pages":"188 - 194"},"PeriodicalIF":1.1,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78762161","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
A method to assess haul roads rolling resistance using dispatch system data 一种利用调度系统数据评估运输道路滚动阻力的方法
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-06-04 DOI: 10.1080/25726668.2021.1935098
Douglas Alexandre Gonçalves Alegre, Rodrigo De Lemos Peroni, Eduardo da Rosa Aquino, Felipe Dille
{"title":"A method to assess haul roads rolling resistance using dispatch system data","authors":"Douglas Alexandre Gonçalves Alegre, Rodrigo De Lemos Peroni, Eduardo da Rosa Aquino, Felipe Dille","doi":"10.1080/25726668.2021.1935098","DOIUrl":"https://doi.org/10.1080/25726668.2021.1935098","url":null,"abstract":"ABSTRACT Haul roads play a significant role in mining, with rolling resistance being one of the main aspects that can affect road quality and consequently the performance of mining trucks. The aim of this study is to estimate the rolling resistance of haul road segments considering longitudinal grade crossed with dispatch system data using back-calculation from Rimpull curves and estimated performance equations developed by Cooper. The use of this method demonstrated that it could assist in quickly identifying issues on mine haul roads and assess road quality locally through rolling resistance estimated maps, which will help to improve maintenance routines and truck performance.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"59 1","pages":"176 - 187"},"PeriodicalIF":1.1,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87094031","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: 3
Evaluation of mine waste characterization to identify opportunities for optimizing project economics using fragmentation analysis 评价矿山废物特性，利用破碎化分析确定优化项目经济效益的机会
IF 1.1
Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2021-05-21 DOI: 10.1080/25726668.2021.1927587
T. Komba
{"title":"Evaluation of mine waste characterization to identify opportunities for optimizing project economics using fragmentation analysis","authors":"T. Komba","doi":"10.1080/25726668.2021.1927587","DOIUrl":"https://doi.org/10.1080/25726668.2021.1927587","url":null,"abstract":"ABSTRACT As metal mineral resources get depleted over time, there is a need to recover metals from ores of lower grades and waste. Mining wastes are largely characterized using physical and mineralogical heterogeneity properties. There is variation in the geochemical properties with different grain sizes, thus, different metal recovery potential. The research evaluated mine waste characterization and identified opportunities for optimizing project economics using fragmentation analysis. This study linked petrographic, compositional and quantitative mineralogical analyses with fragmentation data resulting from conventional mechanical communition of mined-out waste rock. The results improve the understanding of what grain sizes are optimal for metal recovery from the waste rock and established that environmental threats can be mitigated by removing fines from waste. The economic metals including Ni and Cu sulphides are predominantly held in pentlandite and chalcopyrite within the rocks. Maximum liberation and metal recovery are in the finer grains.","PeriodicalId":44166,"journal":{"name":"Mining Technology-Transactions of the Institutions of Mining and Metallurgy","volume":"23 1","pages":"221 - 231"},"PeriodicalIF":1.1,"publicationDate":"2021-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75946958","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
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