Results 41 to 50 of about 24,399 (150)

Research on the Mechanism and Control of Spalling on 8 m Fully Mechanized Mining Face in Huoxi Coalfield

Applied Sciences
The great success of fully mechanized mining with a large mining height of 8 m and above in Mongolia and Shaanxi proves the feasibility of this technology. Although fully mechanized mining with a large mining height significantly increases the production
Lin Meng, Mei Wang, Chenlong Wang, Yongkang Yang   +3 more
doaj   +1 more source

Research on overburden structure of large mining height working face in shallow seam

Meitan xuebao
Based on the overburden conditions of Shendong and Northern Shaanxi coal bases, through the statistical analysis of the measured roof weighting characteristics and overburden caving height in large mining height working faces, combined with physical ...
Qingxiang HUANG, Jinlong GAO, Yehao WEI
doaj   +1 more source

Innovation progress and prospect on key technologies of intelligent coal mining

Gong-kuang zidonghua, 2018
Innovation and practice were summarized overall about intelligent fully mechanized coal mining in thin coal seam and thinner coal seam, intelligent fully mechanized coal mining of large mining height and super large mining height in thick coal seam, and ...
WANG Guofa, FAN Jingdao, XU Yajun, REN Huaiwei   +3 more
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Development characteristics of water conduction fracture zone in deep coal seam mining in Ordos Basin

Meikuang Anquan, 2021
Most coal mines in Ordos Basin are mainly Jurassic coal seams. The mining conditions are characterized by large mining height and depth. The roof aquifer is numerous and poses a serious threat to mine safety.
QIN Wei, LI Wenping
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Pressure Control Technology at the Hard Thick Sandstone Roof in an Island Mining Face with a Large Mining Height

Tehnički vjesnik, 2020
Fracture of a critical stratum on a coal seam roof may cause strong strata pressure behaviours. In particular, a large-scale sudden fracture of the critical stratum, which is formed by hard thick sandstones on a mining face with a large mining height, can easily cause dynamic disasters of wells.
Baojie Fu*, Min Tu, Qingchong Zhao
openaire   +4 more sources

Cutting‐Caving Ratio Optimization of Fully Mechanized Caving Mining with Large Mining Height of Extremely Thick Coal Seam [PDF]

Advances in Civil Engineering, 2019
Serious rib spalling and low recovery rate problems caused by the poor top‐coal caving property (TCCP) were investigated in fully mechanized caving mining with large mining height (FMCMLMH) of extremely thick coal seam. For this aim, theoretical calculation, numerical simulation, and engineering application were applied to study the reasonable cutting ...
Kai Wang, Tong Zhao, Kaan Yetilmezsoy, Xiaoqiang Zhang   +3 more
openaire   +3 more sources

Key technology and equipment for fully mechanized mining with extra-large shearing height of 10 m in extra-thick coal seam

Meitan xuebao
Fully mechanized mining technology with extra-large shearing height is the optimal technical approach to achieve high-yield, high-efficiency and high-recovery mining for 6−10 m ultra-thick coal seam in Chinese coal mines.
Hongpu KANG, Yajun LEI, Futang ZHAO, Gang XU, Zenglin LI, Mingzhong LI, Rui WANG, Zhizeng HUANG, Jiangbin LIU, Ying MA, Cundi HAN, Yanjun FENG, Zhen ZHANG, Jinhu ZHANG, Jianchao REN, Yejie SONG, Mingsheng ZENG, Lixing CHENG   +17 more
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Surrounding rock control technology of 10 m super large mining height working face in Caojiatan Coal Mine

Meitan xuebao
The 10 m ultra-large mining height of Caojiatan Coal Mine is a world’s first in terms of single mining height and mining intensity, and the effective control of surrounding rock in the stope is crucial for safe and efficient mining at the working face ...
Rui WANG, Gang XU, Hongpu KANG, Zhen ZHANG, Yajun LEI, Yanjun FENG, Ying MA, Zhizeng HUANG, Qianjin LIU, Xiaogang LIU, Xingyu LIN, Rongshan MA, Zhen ZHAO, Zhengjie LI   +13 more
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Research on Overburden Movement Characteristics of Large Mining Height Working Face in Shallow Buried Thin Bedrock

Energies, 2019
The overburden movement of the large mining height working face of shallow buried thin bedrock (SBTB) is a complex engineering problem with “time-space-intension”, which is of great significance to realize efficient and safe mining in the ...
Qingxiang Huang, Yanpeng He
doaj   +1 more source

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

Geofluids
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   +7 more
openaire   +1 more source