Novel Approach For The Destress Blasting In Hard Rock Underground Copper Mines,
2022
KGHM CUPRUM Ltd. Research and Development Centre, Department of Rock Engeenering, 2-8 Sikorskiego Street, 53-659 Wrocław, Poland
Novel Approach For The Destress Blasting In Hard Rock Underground Copper Mines, Piotr Mertuszka, Marcin Szumny, Krzysztof Fuławka, Piotr Kondoł
Journal of Sustainable Mining
The present study investigates the possibility of developing a novel method for reducing seismicity and rockbursts in deep underground mines based on modifying drilling and blasting patterns. The main goal was to develop and implement firing patterns for multi-face production blasting, which allow increasing the capability of inducing stress relief in the rock mass, manifested in the seismic event. This method may improve stability control in underground workings, and mitigate risks associated with the dynamic effects of rock mass pressure compared with currently used methods. Thus, the seismic energy may be released immediately after blasting in a controlled way. For …
Estimation Of Coal Density Using A 3d Imaging System: Rhovol,
2022
Missouri University of Science and Technology
Estimation Of Coal Density Using A 3d Imaging System: Rhovol, F. Nakhaei, Q. P. Campbell, M. Le Roux, S. Botlhoko
Mining Engineering Faculty Research & Creative Works
The results of coal sink and float tests are plotted as washability curves. Analysis of these curves indicates the most effective method by which the coal can be cleaned. Sink and float experiments are sampling-dependent, destructive, and use toxic chemicals. The present research introduces an alternative method based on a 3D imaging system called RhoVol, in which the density of individual particles is determined from mass and volume measurements. A quantitative error analysis was conducted on coal sample density measurements obtained by RhoVol, and the main factors influencing the errors identified and investigated. The results show that the drawback of …
Challenges Of Modeling Rainfall Triggered Landslides In A Data-Sparse Region: A Case Study From The Western Ghats, India,
2022
Michigan Technological University
Challenges Of Modeling Rainfall Triggered Landslides In A Data-Sparse Region: A Case Study From The Western Ghats, India, C. L. Vishnu, T. Oommen, Snehamoy Chatterjee, K. S. Sajinkumar
Michigan Tech Publications, Part 1
Accurate rainfall estimates are required to forecast the spatio-temporal distribution of rain-triggered landslides. In this study, a comparison between rain gauge and satellite rainfall data for assessing landslide distribution in a data-sparse region, the mountainous district of Idukki, along the Western Ghats of southwestern India, is carried out. Global Precipitation Mission Integrated Multi-satellitE Retrievals for GPM-Late (GPM IMERG-L) rainfall products were compared with rain gauge measurements, and it was found that the satellite rainfall observations were underpredicting the actual rainfall. A conditional merging algorithm was applied to develop a product that combines the accuracy of rain gauges and the spatial …
Replacing Combustion Engines With Hydrogen Fuel Cells To Power Mining Haul Trucks: Challenges And Opportunities,
2022
Missouri University of Science and Technology
Replacing Combustion Engines With Hydrogen Fuel Cells To Power Mining Haul Trucks: Challenges And Opportunities, Ayorinde Akinrinlola
Masters Theses
"With the proven advantage of higher energy density in hydrogen fuel cells over batteries, there is potential to apply fuel cells to power mining haul trucks. This study aims to evaluate the technical and economic feasibility of hydrogen fuel cell electric mine trucks as an alternative to current mine haul trucks. Specifically, the project: (1) developed an economic framework for evaluating the integration of renewable energy powered haul trucks into mining; and (2) applied vehicle drivetrain and energy simulation in Matlab/Simulink to elucidate the challenges and opportunities of incorporating hydrogen fuel cell technology into the current form factors of mine …
Flood Hazard Index Application In Arid Catchments: Case Of The Taguenit Wadi Watershed, Lakhssas, Morocco,
2022
Université Ibn Zohr
Flood Hazard Index Application In Arid Catchments: Case Of The Taguenit Wadi Watershed, Lakhssas, Morocco, Mustapha Ikirri, Farid Faik, Fatima Zahra Echogdali, Isabel Margarida Horta Ribeiro Antunes, Mohamed Abioui, Kamal Abdelrahman, Mohammed S. Fnais, Abderrahmane Wanaim, Mouna Id-Belqas, Said Boutaleb, Kochappi Sathyan Sajinkumar, Adolfo Quesada-Román
Michigan Tech Publications, Part 1
During the last decade, climate change has generated extreme rainfall events triggering flash floods in short periods worldwide. The delimitation of flood zones by detailed mapping generally makes it possible to avoid human and economic losses, especially in regions at high risk of flooding. The Taguenit basin, located in southern Morocco, is a particular case. The mapping of the flood zones of this basin by the method of the Flood Hazard Index (FHI) in a GIS geographic information systems environment was based on the multi-criteria analysis, taking into consideration the seven parameters influencing these extreme phenomena, namely rainfall, slope, flow …
Table Of Contents,
2022
China Coal Technology and Engineering Group (CCTEG)
Fast Quantitative Interpretation Of Surface-Borehole Tem Using Transient Impulse Peak Time,
2022
Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China; Key Laboratory of Geophysical Electromagnetic Probing Technologies, Ministry of Natural Resources, Langfang 065000, China; College of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Fast Quantitative Interpretation Of Surface-Borehole Tem Using Transient Impulse Peak Time, Zhi Qingquan, Wu Junjie, Wang Xingchun, Yang Yi, Zhang Jie, Deng Xiaohong
Coal Geology & Exploration
Due to the complex response law of the surface-borehole Transient Electromagnetic Method (TEM), qualitative analysis and semi-quantitative interpretation are the most widely used interpretation methods. However, the methods cannot obtain the resistivity parameter of the earth directly. To solve this problem, a fast quantitative interpretation method based on transient impulse peak time is proposed. Firstly, the expression of uniform half-space surface-borehole transient electromagnetic response is given, and the impulse time characteristics of surface-borehole transient electromagnetic response are analyzed. The results show that the deeper the receiving point is buried and the higher the earth conductivity is, the later the transient …
Key Technical Progress Of Water Cutoff Curtain Technology In Open-Pit Coal Mines In China,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China;
Key Technical Progress Of Water Cutoff Curtain Technology In Open-Pit Coal Mines In China, Huang Xuanming, Zhang Yan, Wang Mingxing, Teng Qingshan, Li Guozhi
Coal Geology & Exploration
The method of pumping and discharging groundwater is widely used in open-pit coal mines for groundwater control in China to meet the requirements of safe coal mining, which causes great damage to water resources and seriously affects the ecological environment around coal mines. In recent years, with the all-round development of the economy, China has put forward higher requirements for ecological environment protection and ecological civilization construction. How to optimize and change the groundwater control mode and reduce the volume of pit drainage is a new subject generally in water prevention and control of open-pit coal mines. The use of …
Application And Effect Evaluation Of Water Cutoff Curtain Technology In Yuanbaoshan Open-Pit Coal Mine,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Application And Effect Evaluation Of Water Cutoff Curtain Technology In Yuanbaoshan Open-Pit Coal Mine, Gao Sheng, Li Guozhi, Guo Yingjie, Tian Zenglin, Shao Dongmei, Zhu Hongjun
Coal Geology & Exploration
Yuanbaoshan open-pit coal mine of Inner Mongolia is a rare extra large water rich open-pit coal mine at home and abroad. In order to resolve the problems of high production cost and high environmental risk caused by drainage for many years, it is plan to adopt water cutoff curtain technology to closure the seepage supply channel. By analyzing the hydrogeological and engineering geological conditions of the mine, the groundwater water control method of combining arc semi-closed curtain with group wells drainage hydraulic curtain was proposed. The curtain test study was carried out in the mine 452 m flat plate by …
Water Level Evolution Pattern Of Loose Layers Under Water Cutoff Curtain In Ecologically Fragile Open-Pit Mines,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China; College of Resources and Earth Sciences, China University of Mining and Technology, Xuzhou 221116, China
Water Level Evolution Pattern Of Loose Layers Under Water Cutoff Curtain In Ecologically Fragile Open-Pit Mines, Wang Hai, Wang Yonggang, Zhang Yan, Sun Hao, Miao Hechao
Coal Geology & Exploration
Eastern Inner Mongolia of China is characterized by a fragile ecological environment and scarce water resources. High-intensity mining in open-pit coal mines has caused drastic changes in the recharge, runoff and discharge of the groundwater system, resulting in a significant drop in the water level of the loose layer, depletion of surface stream flow and destruction of the ecological environment. To reveal the evolution of water level in the loose layer under the water cutoff curtain in ecologically fragile open-pit mines, analyze the characteristics of groundwater distribution in and the influence of mining on the water level of loose layers, …
Ecological Restoration Strategies For Coal Mines In China Based On Vegetation Zones And Ecological Sensitivity,
2022
School of Architecture and Design, China University of Mining and Technology, Xuzhou 221116, China
Ecological Restoration Strategies For Coal Mines In China Based On Vegetation Zones And Ecological Sensitivity, Zhou Hongxuan, Wang Zhaoqing, Pu Hongtong, Tao Guixin, Sun Jing
Coal Geology & Exploration
Coal is the main source of energy in China and the most important driver of our development for a long time. It is predicted that coal is going to be the main energy source for our social and economic development in the future. However, the long-term coal mining activities in China have caused serious damage to the ecological environment and comprehensive ecological restoration is urgently needed. At present, most coal mine ecological restoration is limited within a small scale in China, such as one or several mine areas, lacking of ecological restoration planning at the national spatial level, and corresponding …
Techniques Of Double-Pipe And Double-Acting Directional Drilling With Air In Broken And Soft Coal Seams In Underground Coal Mines,
2022
China Coal Research Institute, Beijing 100013, China; Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Techniques Of Double-Pipe And Double-Acting Directional Drilling With Air In Broken And Soft Coal Seams In Underground Coal Mines, Wang Li
Coal Geology & Exploration
In the broken and soft coal seam drilling, the outburst and collapse of the hole occur easily, resulting in shallow drilling depth and low rate of hole forming, which seriously restrict the efficient gas control in the broken and soft coal seam. With the rise of gas control models, such as replacing roadway with holes and progressive drainage of the broken and soft coal seam, higher requests have been put forward to the gas drainage hole. The further improvement of the drilling depth, drilling accuracy and hole forming rate of the broken and soft coal seam can meet the needs …
Water Control Principle Of Lateral Water Cutoff Curtain And Numerical Analysis Of Its Water Interception Effect In Yuanbaoshan Open-Pit Coal Mine——Taking Yuanbaoshan Open-Pit Coal Mine As An Example,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China; Shaanxi Key Laboratory of Preventing and Controlling Technology for Coal Mine Water Hazard, Xi’an 710077, China; Shaanxi Province “Four Main Bodies and One Combination” School Enterprise Joint Research Center for Ecological Environment Protection and Restoration of Mining Areas (Coal Mines) in the Middle of the Yellow River Basin, Xi’an 710077, China
Water Control Principle Of Lateral Water Cutoff Curtain And Numerical Analysis Of Its Water Interception Effect In Yuanbaoshan Open-Pit Coal Mine——Taking Yuanbaoshan Open-Pit Coal Mine As An Example, Zhao Chunhu, Wang Mingxing, Cao Haidong, Qu Guowen, Wang Yong, Guo Yingjie
Coal Geology & Exploration
In the process of open-pit coal mining, drainage is an important aspect causing the loss of groundwater resources. Taking Yuanbaoshan open-pit coal mine in Chifeng City, Inner Mongolia as the research object, this paper analyzes the control principle of the curtain wall construction driven by open-pit mining on the groundwater system according to the hydrogeology of the study area and the characteristics of open-pit coal mine development. It comes to the conclusion that the weaker the permeability of the curtain wall, the greater the thickness, and shortening the distance from the recharge water body is the basic idea of reducing …
Research On Three-Component Responses Characteristics Of Axial Anisotropy Tunnel-Hole Transient Electromagnetic,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Research On Three-Component Responses Characteristics Of Axial Anisotropy Tunnel-Hole Transient Electromagnetic, Guo Jianlei, Gao Xiaowei, Hou Yanwei
Coal Geology & Exploration
Large interpretation errors may exist in exploration areas with obvious conductivity anisotropy when applying tunnel-hole transient electromagnetic method. In this paper, the control equation is built by introducing the conductivity anisotropy tensor, which allows the current density of the rectangular loop source to be added into the Maxwell equation Ampere loop theorem based on the finite difference time domain (FDTD) algorithm in order to realize the loading of any current source. The control equation is discretized by the difference instead of the differential to realize the forward calculation of the tunnel-hole transient electromagnetic 3D model. Forward modeling is carried out …
Imaging Method Of Borehole Transient Electromagnetic Anomaly Response Boundary In Coal Mines Based On Clustering,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China; Key Scientific and Technological Innovation Team of Shaanxi Province (Geophysical Exploration Technology and Equipment Innovation Team), Xi’an 710077, China; Coal Industry Engineering Research Center (Physical Prospecting Technology and Equipment), Xi’an 710077, China
Imaging Method Of Borehole Transient Electromagnetic Anomaly Response Boundary In Coal Mines Based On Clustering, Fan Tao, Li Ping, Zhang Youzhen, Zhao Rui, Fang Zhe, Fan Yilin, Liu Lei, Wang Cheng, Li Yuteng
Coal Geology & Exploration
In order to improve the ability to recognize and interpret the abnormal response boundary in the transient electromagnetic inversion imaging results of boreholes in coal mines, and to complete geophysical interpretation such as an accurate description of hidden water disasters in front of the heading face and a fine analysis of hidden disaster-causing factors, this paper proposes the application of apply clustering method of unsupervised machine learning to analyze the borehole transient electromagnetic processing results. According to the numerical distribution characteristics of resistivity and the characteristics of the two clustering methods, the K-Means clustering algorithm is selected to aggregate and …
Application Of Surface And Borehole Tem Joint Exploration In 2 000 M Deep Mineral Exploration,
2022
Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China; Key Laboratory of Geophysical Electromagnetic Probing Technologies, Ministry of Natural Resources, Langfang 065000, China
Application Of Surface And Borehole Tem Joint Exploration In 2 000 M Deep Mineral Exploration, Wu Junjie, Liu Bin, Zhi Qingquan, Deng Xiaohong, Wang Xingchun, Yang Yi, Liu Dongming, Qiu Jinzhu
Coal Geology & Exploration
Deep mineral exploration is a challenge. The borehole Transient Electromagnetic Method (TEM) goes deep underground through the sensor along the borehole, and gets closer to the deep target, so as to improve the ore discovery rate and prospecting effect. TEM is widely used in deep prospecting and exploration in foreign countries, and has achieved many important results. However, in China, due to the slow development of instruments, theoretical research and interpretation technology, it is less used in practical deep prospecting. This paper introduces a typical case about the 2 000 m deep prospecting in Baiyun Gold Deposit in Qingchengzi, Liaoning …
Application Of Borehole Transient Electromagnetic Method In Detection Of Floor Failure Depth In Fully Mechanized Top Coal Caving Face,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Application Of Borehole Transient Electromagnetic Method In Detection Of Floor Failure Depth In Fully Mechanized Top Coal Caving Face, Wang Cheng, An Youxin, Zhu Hongjun, Guo Jianlei
Coal Geology & Exploration
The carboniferous-Permian No. 6 coal seam in the eastern Jungar Coalfield of Ordos Basin is an extra-thick coal seam, and the coal floor is particularly threatened by the Ordovician limestone aquifer. The mining effect will lead to the formation of the bottom mining damage zone, and new water-conducting channels may be formed, which in turn will cause sudden water disasters. Aiming at the testing problem of floor mining failure zone, the method of transient electromagnetic method in hole with moving source and receiving is proposed to obtain resistivity characteristic data of strata from floor drilling before and after mining. Firstly, …
Present Study Situation Review Of Borehole Transient Electromagnetic Method,
2022
Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China; Laboratory of Earth Electromagnetic Exploration, Shandong University, Jinan 250061, China; Advanced Exploration and Transparent City Innovation Center, Shandong Research Institute of Industrial Technology, Jinan 250061, China
Present Study Situation Review Of Borehole Transient Electromagnetic Method, Sun Huaifeng, Zhang Yingying, Zhao Youchao, Liu Yuchao, Zhao Hualiang
Coal Geology & Exploration
In the borehole transient electromagnetic method (TEM), the receiving probe is placed in the borehole, which is different from either aerial or ground TEM. In such methods, as the probe will be closer to the detection target and far away from surface, not only stronger response signals can be observed, but also the interference of various electromagnetic signals outside the borehole can be attenuated effectively. It can meet the demand of meticulous detection with large burial, especially the detection demand of deep blind ore and water hazard. The present situation of using various methods in the study in forward modeling, …
Mechanical Properties And Impact Energy Index Of Coal Affected By Gas Pressure And Evolutionary Mechanism,
2022
School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China
Mechanical Properties And Impact Energy Index Of Coal Affected By Gas Pressure And Evolutionary Mechanism, Ding Xin, Xiao Xiaochun, Pan Yishan
Coal Geology & Exploration
The frequent occurrence of gas emission and outburst accidents caused by rock bursts in deep coal seams poses a great threat to safe underground production. Therefore, clarifying the evolution law of the mechanical properties and burst potential of gas on coal and rock is the basis for establishing effective prevention and control measures. Using the self-developed visual coal fluid-solid coupling test system, we carried out the physical experiment to study the gas adsorption, mechanical properties and fragment distribution of coal affected by gas pressure, and analyzed the evolution characteristics and mechanism of the bursting energy index. The results show that …
Construction And Application Of Feasibility Evaluation Model For Gas Extraction In Goafs Of Abandoned Coal Mines,
2022
College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China; State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Jiaozuo 454003, China; State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Jiaozuo 454003, China
Construction And Application Of Feasibility Evaluation Model For Gas Extraction In Goafs Of Abandoned Coal Mines, Yang Ming, Zhu Lin, Quan Xingyuan, Xu Jing, Liu Maomao, Zhang Tao
Coal Geology & Exploration
Against the background of carbon neutrality and carbon peaking policy, the development of gas resources in abandoned coal mines can generate high resource, economic and environmental benefits. The evaluation index system is established through field research and literature review from technical feasibility and economic rationality aspects. The game theory-fuzzy comprehensive evaluation model is established by combining the weighting method of game theory with the fuzzy comprehensive evaluation method. The abandoned Gushuyuan Mine is used as an example to verify the rationality of the evaluation model. The weights of gas resource conditions and gas preservation conditions in the first-level indicators are …
