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Insights in Mining Science & Technology最新文献

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Advancing Electronic Waste Management Techniques among Electrical/Electronic Technicians’ Workshops for Sustainable Healthy Society 在电气/电子技术人员研讨会中推进电子废物管理技术，促进可持续健康社会
Insights in Mining Science & Technology Pub Date : 2019-11-19 DOI: 10.19080/imst.2019.01.555566
Yekinni S Afeez
{"title":"Advancing Electronic Waste Management Techniques among Electrical/Electronic Technicians’ Workshops for Sustainable Healthy Society","authors":"Yekinni S Afeez","doi":"10.19080/imst.2019.01.555566","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555566","url":null,"abstract":"elec-Abstract This study focused on the advancement of e-waste techniques among electrical/electronic technicians’ workshops for sustainable healthy society. Study was conducted in Nigeria. The participants for the study included 87 university engineering lecturers and 54 public health officers. Study adopted survey research design and structured questionnaire for data collection. The study was validated by three experts and reliability coefficient of 0.79 was achieved. Data obtained was analyzed using percentage, mean and standard deviation while t-test and ANOVA were used to test hypotheses. The result claimed that all e-waste components are hazardous except aluminum. Meanwhile, the level of hazardous varies and depends on type of e-waste and level of abundance. Result claimed that e-waste in electrical/electronic technician workshop have severe consequences such as uncontrolled fire and inflammatory/respiratory problem among others in the environment. Result confirmed that electrical/electronic technicians adopted unsafe method for managing e-waste such as dumping of e-waste inside flowing water and swamp and using e-waste for land filling. Result explained further that electrical/electronic technicians are facing challenges- exposure to injury and unavailability of modern equipment among others- in managing e-waste. Also, result confirmed that technique for managing e-waste in electrical/electronic workshop include establishment of recycling site and establishment and implementation of regulation. Meanwhile, result stated that qualification, experience, age and occupation affects respondent opinions in response to research questions.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"622 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116522816","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
Study on 3D Micro-pore Structure Characteristics of Dolomite Reservoir with Different Scales 不同尺度白云岩储层三维微观孔隙结构特征研究
Insights in Mining Science & Technology Pub Date : 2019-11-01 DOI: 10.19080/imst.2019.01.555565
C. Xie
{"title":"Study on 3D Micro-pore Structure Characteristics of Dolomite Reservoir with Different Scales","authors":"C. Xie","doi":"10.19080/imst.2019.01.555565","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555565","url":null,"abstract":"an-Abstract Tight dolomite reservoir microscopic pore structure characteristic is the key factor to explore this kind of unconventional reservoirs. In this paper, 3D high resolution reservoir characterization technique based on Micro - CT imaging, constant-rate mercury injection, high-pressure mercury injection and low-temperature nitrogen adsorption test technology are applied to study the micro-pore textures characteristics for T12C well Tanggu, Dagang oilfield with different scales. Through Micro-CT scan imaging, image processing, 3D visualization, porosity calculation and pore structure parameter reconstruction, it is concluded that Micro - CT imaging can directly reflect the changes of fracture and pore in 3D space; the pore radius distribution are close to the result of constant-rate mercury injection and high-pressure mercury injection method, wider than that of low-temperature nitrogen adsorption test; compared with these three methods, the porosity range obtained by Micro - CT imaging technology is slightly narrow. Thus, in order to be effective, comprehensive and accurate to characterize different scales microscopic pore structure characteristics of tight dolomite reservoir, it is better to integrate these four methods.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114789447","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
Abandoned Mine Voids for Pumped Storage Hydro 抽水蓄能的废弃矿井空洞
Insights in Mining Science & Technology Pub Date : 2019-10-17 DOI: 10.19080/imst.2019.01.555563
P. Schubert
{"title":"Abandoned Mine Voids for Pumped Storage Hydro","authors":"P. Schubert","doi":"10.19080/imst.2019.01.555563","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555563","url":null,"abstract":"","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"10 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123497655","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
On the Topology of State-space, Linear vs. Nonlinear Theories and Dry Friction 论状态空间拓扑，线性与非线性理论及干摩擦
Insights in Mining Science & Technology Pub Date : 2019-10-15 DOI: 10.19080/imst.2019.01.555562
J. Verhás
{"title":"On the Topology of State-space, Linear vs. Nonlinear Theories and Dry Friction","authors":"J. Verhás","doi":"10.19080/imst.2019.01.555562","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555562","url":null,"abstract":"The work reported here aimed to eliminate the gap between static- and sliding friction on the ground of non-equilibrium thermodynamics with dynamic (internal) degrees of freedom introduced into the state space of the system. Here a germ of a thermodynamic theory is sketched without acquiring generality. Here the simplest model is looked for to eliminate the gap between static and kinetic friction. It is not a complete idea at all but may be a guideline for further modeling. The fork where the train of thoughts stops at gives way to several kinds of possibilities, a number of which by the author’s opinion may have their own realm of application. Finally, an accurately accountable model is given that may be assumed friction if we pretend not knowing its origin and the law differs signficantly from the nearly exclusively used Coulomb’s law. This example supports the idea that friction cannot be described in a simple and uniform theory.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114471885","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
Optimization of the Optical Methods of Ore Grade Analysis at Mineral Processing 选矿过程中矿石品位分析光学方法的优化
Insights in Mining Science & Technology Pub Date : 2019-09-26 DOI: 10.19080/imst.2019.01.555560
V. Morozov
{"title":"Optimization of the Optical Methods of Ore Grade Analysis at Mineral Processing","authors":"V. Morozov","doi":"10.19080/imst.2019.01.555560","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555560","url":null,"abstract":"In-stream ore grade analysis is a new trend in effective control of ore benefication processes. On-line estimation of ore grade can be implemented based on continuous measurement of the mineralogical composition directly in-stream or using instream sampling with the following analysis. Reliable separate determination of minerals in ore is possible using modern formats of colour image recognition. The spectral characteristics of minerals in visible light are the source of information for optical spectrum-based estimation of ore mineralogical composition (Figure 1). The task of determining the grade of ore, entering processing, is to determine its similarity to the main technological types of ores [1]. The calculation of ore grade was carried out using a multi-criteria method for affiliation shares calculations. The system mathematical model provides for calculation of the incoming ore affiliation by six (or more) significant parameters (minerals contents in the ore). At the Erdenet processing plant (Mongolia), a new facility for advanced ore diagnostics, based on optical analyzer of mineral composition, was tested. The optical spectrum-based analysis system was installed above the conveyor (Figure 2) for feeding ore to the grinding operation [2]. The ore scanning on the conveyor belt is carried out continuously. Then, using the algorithm, recognition of the ore grade is carried out. For exact analysis, the special flatbed facility was developed [3]. The measurement technique involves preparing the ore sample, forming the measurement area in the form of a flat portion of the sample, illumination and capture of the images in the visible spectrum (Figure 3).","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114936836","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
Effects of Overused Top-hammer Drilling Bits 过度使用顶锤钻头的影响
Insights in Mining Science & Technology Pub Date : 2019-09-25 DOI: 10.19080/IMST.2019.01.555558
S. Hwang, H. Jang
{"title":"Effects of Overused Top-hammer Drilling Bits","authors":"S. Hwang, H. Jang","doi":"10.19080/IMST.2019.01.555558","DOIUrl":"https://doi.org/10.19080/IMST.2019.01.555558","url":null,"abstract":"The drill bits are the foremost common consumables in the mining industry but an essential part of the rock excavation process. The management of the bit wear directly influences the drilling quality and the productivity of the mine but often overlooked as a common consumable part. The study aims to analyze the effects of overused top-hammer drilling bits to various type of bit failure modes. 341 drill bits samples (ST68-102mm) were visually investigated to check the status of overused and failures. The button chipped (BC) type of failure occurs most frequently among all other types of bit failures. Subsequently, a positive correlation between the number of grinding rounds and bit failures were found. In addition, a cost analysis was conducted to demonstrate the adverse effects of drilling with overused bits. The results explicitly show the cost loss of using overused bits as the cost per metre (CPM) of 75% flat bits calculated to 3.1 AUD per metre while the CPM stays at 1.6 AUD per metre for using rock bits with 30% flat buttons.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128060999","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
New Approach to Longwall Gate Support 长壁闸门支护新方法
Insights in Mining Science & Technology Pub Date : 2019-09-25 DOI: 10.19080/imst.2019.01.555559
M. Hamid
{"title":"New Approach to Longwall Gate Support","authors":"M. Hamid","doi":"10.19080/imst.2019.01.555559","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555559","url":null,"abstract":"Present gate support systems are typically only passive in design, and in less than ideal ground conditions, often result in loss of travel-way integrity and longwall productivity as the front abutment passes. Notably, “Mines in the western United States the amount of convergence measured in the mine entry will vary depending on how much load resistance is provided by the support system the lowest required support capacity would be one that is developed just before this critical roof deformation occurs where failure of the immediate roof is fast approaching. However, designing to this lower limit of support capacity leaves no margin of error if load conditions worsen have had limited choices for standing support [1].”","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121815175","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
Blast Design for Controlling Some of Environmental Nuisances during Deep Hole Blasting in Surface Overburden Benches 地表覆盖层深孔爆破中控制环境干扰的爆破设计
Insights in Mining Science & Technology Pub Date : 2019-09-17 DOI: 10.19080/imst.2019.01.555557
B. Choudhary
{"title":"Blast Design for Controlling Some of Environmental Nuisances during Deep Hole Blasting in Surface Overburden Benches","authors":"B. Choudhary","doi":"10.19080/imst.2019.01.555557","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555557","url":null,"abstract":"The present study suggesting a safe methodology to control blast induced ground vibration and air overpressure within the safe limits specifying the safe permissible explosive charge per delay and per round along with the blast design parameters which should be used while blasting mainly to protect vulnerable structures in the vicinity. Keeping in view the above-mentioned requirements, 11 rounds of deep hole trial blasts were studied constituting all together 19 blast events recorded by seismographs. While selecting the blast monitoring stations all the sensitive points have been covered which mainly included, dwellings and structures belonging to owner and a few other places within the mine in order to study the blast induced wave propagation and attenuation for various scaled distance. Safe charges have been recommended after regression analysis and suitable blast patterns were recommended for safe and productive blasting.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121401872","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
Maintenance of Bucket Elevator (Case of the Cement Plant of El Malabiod, Algeria) 斗式提升机的维护保养(以阿尔及利亚El Malabiod水泥厂为例)
Insights in Mining Science & Technology Pub Date : 2019-09-13 DOI: 10.19080/imst.2019.01.555556
A. Zoubir
{"title":"Maintenance of Bucket Elevator (Case of the Cement Plant of El Malabiod, Algeria)","authors":"A. Zoubir","doi":"10.19080/imst.2019.01.555556","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555556","url":null,"abstract":"","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131408745","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
Nuclear Power from Lunar ISRU 来自月球ISRU的核能
Insights in Mining Science & Technology Pub Date : 2019-08-29 DOI: 10.19080/imst.2019.01.555555
P. Schubert
{"title":"Nuclear Power from Lunar ISRU","authors":"P. Schubert","doi":"10.19080/imst.2019.01.555555","DOIUrl":"https://doi.org/10.19080/imst.2019.01.555555","url":null,"abstract":"Thorium on the lunar surface can be transmuted into fissile uranium suitable for a controlled chain reaction to provide heat. Thorium is fertile, requiring bombardment by neutrons to become a suitable nuclear fuel. Oxides of thorium are dense and can be concentrated and beneficiated from comminuted regolith via inertial or thermal means. A neutron flux can be provided by encasing thoria within a beryllium and graphite vessel, which emits neutrons upon exposure to gamma rays or galactic cosmic rays. After a brief period at protactinium the transmuted material becomes U-233, a desirable fuel because decay product half-lives are below 100 years. When compressed into fuel pellets the uranium oxide is configured into a reactor through which a working fluid can extract thermal power. With regolith tailings as shielding such a reactor can operate safely for 30 years. A century later, the site can be harvested for specialty elements and then made available for other uses. The advent of launch-safe nuclear rockets in space greatly expands the potential for in situ resource utilization, a space-based economy, and profitable exploitation of the asteroid belt.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114497845","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
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