Results 31 to 40 of about 24,399 (150)

Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face [PDF]

Shock and Vibration, 2020
The movement and destruction of the hard roof in a stope is an important reason for the occurrence of strong ground pressure disasters at the working face. Considering Tongxin Coal Mine as the engineering background, the stress distribution law of the surrounding rock and the overburden rock damage characteristics of a large-mining-height working face ...
Hongfei Duan, Lijuan Zhao
openaire   +2 more sources

Control of Gob-Side Roadway with Large Mining Height in Inclined Thick Coal Seam: A Case Study

Shock and Vibration, 2021
The gob-side roadway of 130205, a large-mining-height working face in the Yangchangwan coal mine, was investigated in terms of the mine pressure law and support technology for large mining heights and narrow coal pillars for mining roadways. The research
Xie Fuxing
doaj   +1 more source

Study on “Two Zone” Development Height of Overburden Rock in Fully Mechanized Face with Large Mining Height

IOP Conference Series: Earth and Environmental Science, 2020
Abstract In terms of the problems of the development height of the “two zones” of overburden in the fully mechanized mining face was difficult to predict, taking the 31303 working face in Chahasu coal mine as an example, methods of empirical formula, leakage of drilling fluid and borehole colour TV were used for prediction and ...
Mingze Du, Fanlong Kong, Donghao Wang
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Use of the Equivalent Mining Height Method for Understanding Overlying Strata Movement and Stress Distribution in an Isolated Coal Pillar

Shock and Vibration, 2020
In order to study the changing rules of displacement filed and stress field of overlying strata on isolated pillar with filling mining method, a self-designed model of isolated pillar with an equivalent mining height and a monitoring system of stress is ...
Yang Chen, Dong Li, Fuxing Jiang, Lili Zhang, Cunwen Wang, Sitao Zhu   +5 more
doaj   +1 more source

Application of a New Type of Gel Fire Prevention Technology in Fully Mechanized Coal Face with Large Mining Height

Meikuang Anquan, 2020
There are a lot of coal left in goaf at the both air inlet and outflow sides of large mining height face, where the air leakage is large, and large scope of spontaneous fire takes place easily.
ZHAO Like, ZHANG Xinhai, ZHENG Zhongming
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Adaptive intelligent coupling control of hydraulic support and working face system for 6−10 m super high mining in thick coal seams

Meitan kexue jishu
The reserves and production of thick coal seams account for half of the total reserves and production of raw coal in China. By combing the history of thick coal seam mining, we summarize the technology and equipment development practice of thick coal ...
Huijun HAN, Guofa WANG, Yongxiang XU, Jinhu ZHANG, Sheng LEI, Yanpeng LI   +5 more
doaj   +1 more source

Present situation of support technology and equipment in fully mechanized mining face with supermining height

Meikuang Anquan
One-time full-thickness mining with ultra-high mining height has the characteristics of high mining efficiency and high resource recovery rate. In order to explore the further breakthrough of ultra-high mining height fully mechanized mining technology ...
Huijun HAN, Guofa WANG, Mingzhong LI, Jinhu ZHANG, Yanpeng LI   +4 more
doaj   +1 more source

Study on the Migration Law of Overlying Strata on the Working Surface of Large Mining Height in Y.C.W Coal Mine

Geofluids, 2022
The migration law of overlying strata on working face is of great significance for safe mining of working face. In this paper, theoretical calculation, numerical simulation, and similar simulation are used to study the distribution characteristics, migration, and fracture law of key strata in the overlying strata of 130204 working face of Y.C.W coal ...
Hongtao Liu, Tianhong Huo, Yang Liu, Zhou Han, Zijun Han, Wanliang Liang   +5 more
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The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height

Shock and Vibration, 2021
Coal wall spalling is regarded as a key technical problem influencing safe and efficient mining of large-mining-height working faces while the distribution of abutment pressure within the limit equilibrium zone (LEZ) influences coal wall spalling within ...
Weibin Guo, Shengwei Zhang, Yuhui Li
doaj   +1 more source

Study on overburden structure and working resistance of supports in deep buried coal seam

Meikuang Anquan, 2023
In view of the characteristics of complex overburden structure and strong mining pressure in deep coal seam working face with large mining height, taking Yangchangwan Coal Mine as the engineering background, the mechanical model of overburden rock ...
LIU Hongtao, HAN Zhou, HAN Zijun, YANG Zhihua, HE Weisheng, WANG Sichen, LUO Zilong
doaj   +1 more source