Results 51 to 60 of about 514 (135)

Automatic control system of top coal caving on fully-mechanized coal mining face

Gong-kuang zidonghua, 2015
In view of problems of large randomness, low efficiency of coal caving of artificial operation for top coal caving mining face, an automatic control system of top coal caving on fully-mechanized coal mining face was designed.
WEI Wenya
doaj   +1 more source

“The Actual Harm Was Worse Than What Was Being Recorded”: Accounts of State Violence and Elite Capture in Fossil Energy Infrastructure Construction in a Sacrifice Zone

Antipode, Volume 58, Issue 2, March 2026.
ABSTRACT Construction of the Mountain Valley Pipeline (MVP), a 42‐in. diameter, 303‐mile fracked gas pipeline through Appalachia, was mandated by the US Congress in the Fiscal Responsibility Act of 2023. The pipeline was completed despite numerous legal and regulatory challenges.
Alaina Kinol
wiley   +1 more source

Research on automatic memory coal caving control

Gong-kuang zidonghua, 2019
For low coal caving efficiency, poor coal caving quality and other problems existing in manual coal caving control mode of fully-mechanized top coal caving working face, an automatic memory coal caving control method was proposed by referring to memory ...
CUI Zhifang, NIU Jianfeng
doaj   +1 more source

Mechanical Analysis of the First Fracture Characteristics of Hard Roof of Extra-thick Coal Seam

Meikuang Anquan, 2020
In order to investigate the failure mechanisms of the hard roof in the fully mechanized caving face in the extra-thick coal seam, the mechanical analysis model of the first breaking of the hard top roof in the fully mechanized caving mining of the extra-
LIANG Shaping, LU Yinlong, GUO Peng, WU Bingzhen
doaj   +1 more source

Distribution Characteristics of Stress Sources and Surrounding Rock Structure Control Techniques of Gob‐Side Entry Driving in Extra‐Thick Coal Seam

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
To address the challenges of surrounding rock control caused by complex stress sources and intense ground pressure in gob‐side entry driving (GED) with narrow coal pillars under extra‐thick coal seams, this study takes the 10 m‐thick coal seam 8204 panel of Tashan Coal Mine as the engineering background.
Dongjie Jiang, Guangzhong Sun, Junjie Guo, Junwen Li, Xing Xu, Qi Ma, Arnab Biswas   +6 more
wiley   +1 more source

Study on the Evolution of Concentrated Stress Distribution in Close‐Proximity Coal Seam Residual Pillars

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Closely spaced coal seams are extensively distributed across China. As shallow coal resources face increasing depletion, coal mining is gradually extending to deeper zones. Deciphering the stress distribution pattern of the residual coal pillar floor in closely spaced coal seams is of profound importance to the safe and efficient mining operations of ...
Dengyan Gao, Chenyang Ma, Wen Luo, Kuiying Gao, Jing Chai, Zhicheng Han, Jianhua Chen, Yinsu Tian, Meilu Yu   +8 more
wiley   +1 more source

An Adaptive Response Surface Methodology for Determining Coal Pillar Width in Geologically Variable Longwall Panels

Geofluids, Volume 2026, Issue 1, 2026.
Simulation‐based approaches are increasingly vital for addressing complex design challenges in underground coal mining, a domain where longwall pillar design is critically challenged by geological variability, and conventional methods lack adaptive capacity. This study develops a responsive design framework integrating response surface methodology (RSM)
Sen Yang, Zhe He, Yang Xu, Xin Yu, Yuxin Yuan, Zhiwen Chen, Hui Lu   +6 more
wiley   +1 more source

Coal–Rock Damage and Subsidence Control Technology in Deep‐Mine Strip Mining Under Large Mining Heights

Geofluids, Volume 2026, Issue 1, 2026.
A comprehensive approach incorporating field measurements, theoretical analysis, and numerical simulations was adopted to determine the strip‐mining parameters for mining under large mining heights in kilometer‐deep coal seams and achieve protective mining.
Jiang Shuyin, Guo Wenbing, Li Xingyu, Yang Jie, Ni Huining, Yang Chao, Chai Yixuan, Ma Qi, He Yongliang   +8 more
wiley   +1 more source

Research on influence of coal seam thickness on caving characteristics of top-coal in inclined coal seam fully - mechanized caving faces

Meitan kexue jishu
The coal seam at the 2125 fully mechanized top-coal caving face in Hebi Coal Mine No. 6 exhibits unstable occurrence, with a thickness ranging from 0.4 m to 24 m and a dip angle varying between 8° and 35°.
Dongyin LI, Mingjin JIA, Mengguang LI, Hongbin LI, Shen WANG, Song LI   +5 more
doaj   +1 more source

Method of tail beam posture prediction of top coal caving hydraulic support based on LSTM

Meitan kexue jishu
Fully mechanized caving is the main mining method for extra-thick coal seams in my country. The control accuracy of the caving actuator depends largely on the data feedback of the tail beam posture.
Yupeng YAO, Jinglin ZHANG, Wu XIONG
doaj   +1 more source