Results 31 to 40 of about 33,183,762 (290)

Application of BigML in the Classification Evaluation of Top Coal Caving

Shock and Vibration, 2021
Longwall top coal caving mining is one of the main methods of mining thick coal seams in China. Therefore, carrying out the classification evaluation of top coal caving is of great significance to ensure mining success and reduce the risk of mining ...
Meng Wang, Caiwang Tai, Qiaofeng Zhang, Zongwei Yang, Jiazheng Li, Kejun Shen, Kang Wang   +6 more
doaj   +1 more source

Research on automatic coal caving control system

Gong-kuang zidonghua, 2018
Aiming at problem that fully mechanized caving face at the back end of fully mechanized top coal caving face adopted manual caving control method, its automation level differed greatly from that at the front end of fully mechanized top coal caving face ...
CUI Zhifang, NIU Jianfeng
doaj   +1 more source

Mining footprint of the underground longwall caving extraction method: A case study of a typical industrial coal area in China.

Journal of Hazardous Materials, 2021
Longwall caving mining (LCM) can lead to many environmental problems that have drawn worldwide attention. A previous survey found that most scholars tend to analyze the two issues separately, that is, coal mining-induced subsidence and heavy metal ...
Hengfeng Liu, Yanjun Wang, Shun Pang, Xinfu Wang, Jianguo He, Jixiong Zhang, Alfonso Rodriguez-Dono   +6 more
semanticscholar   +1 more source

Numerical Investigation of Top Coal Drawing Evolution in Longwall Top Coal Caving by the Coupled Finite Difference Method-Discrete Element Method

Energies, 2021
In longwall top coal caving (LTCC), the resource recovery ratio of the working face is directly determined by the top coal recovery ratio. An investigation of the evolution of top coal drawing characteristics and revealing the evolution of top coal ...
Yuming Huo, De-fu Zhu, Zhonglun Wang, Xuan-min Song   +3 more
semanticscholar   +1 more source

Study on Coal Gangue Identification Based on Vibration and Its Adaptability to Coal-Caving Process Parameters

Shock and Vibration, 2023
The broken top coal and gangue in the fully mechanized cave mining will be released from the rear of the hydraulic support in the form of bulk. In this process, the medium properties through the coal opening can be judged by monitoring the vibration ...
Lirong Wan, Jiantao Wang, Dejian Ma, Zhaoji Li, Zhenguo Lu, Zhaosheng Meng   +5 more
doaj   +1 more source

Numerical Simulation on the Evolution of Mining-Induced Fracture Network in a Coal Seam and Its Overburden under the Top Coal Caving Method

, 2020
The evolution of the fracture network induced by mining has an important influence on the mechanical behavior of the rock and the safety of the mine. In this study, a new 3D modeling approach based on discrete fracture network (DFN) and fractal theory ...
Guangdi Deng, Heping Xie, M. Gao, Cong Li, Zhiqiang He   +4 more
semanticscholar   +1 more source

Numerical Investigation of Progressive Slope Failure Induced by Sublevel Caving Mining Using the Finite Difference Method and Adaptive Local Remeshing

Applied Sciences, 2021
Slope failure induced by sublevel caving mining is a progressive process, resulting in the large deformation and displacement of rock masses in the slope. Numerical methods are widely used to investigate the above phenomenon.
Jingzhi Tu, Yanlin Zhang, Gang Mei, N. Xu   +3 more
semanticscholar   +1 more source

Study on mechanism and improvement technology of Top coal loss in horizontal sublevel fully mechanized caving mining

Energy Exploration & Exploitation, 2022
In view of solving the problems of large top coal loss and low recovery rate in the traditional caving process of horizontal section fully mechanized caving mining, taking the fully mechanized caving face of steeply inclined and extra-thick coal seam in ...
Fengfeng Wu, Shurong Zhang, Xin Yue, Changyou Liu, Qiwen Liu, Jian Zhang, Bo Lv, Zhiqiang Gao   +7 more
doaj   +1 more source

Study on the Slurry Diffusion Law of Fluidized Filling Gangue in the Caving Goaf of Thick Coal Seam Fully Mechanized Caving Mining

Energies, 2022
Because of the problem of gangue discharge and surface subsidence during coal mining, the current research on underground filling mainly focuses on the paste filling, solid filling, and grouting filling of the overburden separation layer after ...
Liang Li, Qingxiang Huang, Xiao Zuo, Jie Wu, Baoning Wei, Yanpeng He, Weilong Zhang, Jie Zhang   +7 more
doaj   +1 more source

A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method

Energy Science & Engineering, 2019
At present in China, short‐wall working face coal‐mining methods are among the main methods used for the high‐efficiency recoveries of boundary coal pillars and residual pillars.
Jinhao Wen, Weimin Cheng, Lianjun Chen, S. Shi, Zhi-jie Wen   +4 more
semanticscholar   +1 more source