Results 21 to 30 of about 43,669 (311)

Study on Overlying Strata Movement in Mining Adjacent Working Face of Extra Thick Seam

Meikuang Anquan, 2020
In order to master the movement law of overlying strata after coal mining in adjacent working faces, FLAC finite element software was used to simulate the sequential mining of adjacent working faces in a mine, and the stress, displacement and plastic ...
LAI Xingping, LI Junwei, CUI Feng, SHAN Pengfei
doaj   +2 more sources

Overlying strata movement and stress evolution laws triggered by fault structures in backfilling longwall face with deep depth

Geomatics, Natural Hazards and Risk, 2020
Many dynamic disasters such as coal wall caving and roof falling have happened during longwall face crossing fault. Combined with the coal seam geological conditions in the 1302 longwall face AB coal mine, the paper comprehensively studies the overlying ...
Fangtian Wang, Qi Ma, Cun Zhang, Guangming Feng   +3 more
semanticscholar   +3 more sources

Overlying strata movement and surface deformation through roof cutting and pressure relief: Geomechanics model and field tests

International Journal of Coal Science & Technology
The Self-formed roadways by roof cutting and pressure relief (SF-RCPR) represents a novel approach that eliminates the need for coal pillars by naturally creating roadways through Roof Cutting Pressure Relief (RCPR) technology.
Jiong Wang, Peng Liu, Jian Jiang, Lei Ma, Zhen Yang, Zimin Ma, Manchao He   +6 more
doaj   +2 more sources

Analysis of Overlying Strata Movement and Behaviors in Caving and Solid Backfilling Mixed Coal Mining [PDF]

Energies, 2017
Based on techniques of close upper protective coal-rock layer mining, relieved gas extraction, and underground gangue washing-discharging-backfilling, this paper initiates the concept of mixed fully-mechanized coal mining, which combines a solid backfilling method and a caving method (hereinafter referred to as “backfill and caving mixed mining ...
Yanli Huang, Jixiong Zhang, Wei Yin, Qiang Sun   +3 more
openaire   +3 more sources

Karst Water Pressure’s Varying Rule and Its Response to Overlying Strata Movement in Coal Mine

Advances in Civil Engineering, 2020
Karst water is widespread throughout China and is heavily influenced by complex geological conditions, and floor inrush of karst waters associated with coal seams is the second most common coal mine disaster in China. Due to the limitation of precision and cost of geophysical exploration technology, the volume and pressure of karst water are ...
Jian Hao, Hua Bian, Anfa Chen, Jiahui Lin, Dongjing Xu   +4 more
openaire   +3 more sources

Study on Overlying Strata Movement and Stress Distribution of Coal Mining Face with Unequal Thickness Bedrock

Processes
The variation in roof structure induced by changes in bedrock thickness exerts a direct influence on the stress distribution within lower strata, consequently governing the stability of roadway surrounding rock. To investigate the impact of bedrock thickness variations on overburden fracture behavior and stress evolution in deep-buried thick loose ...
Chuanwei Zang, Feng Bai, Miao Chen, Zihao Liu, Guangchao Zhang, Yining Zheng, You Li, Peidong Li   +7 more
openaire   +2 more sources

Overlying strata movement rules and safety mining technology for the shallow depth seam proximity beneath a room mining goaf

International Journal of Mining Science and Technology, 2015
Aiming at the shallow depth seam proximity beneath a room mining goaf, due to that the shallow depth seam is exploited using the longwall mining and overlain by thin bedrock and thick loose sands, many accidents are likely to occur, including roof ...
Fangtian Wang, Cun Zhang, Xiaogang Zhang, Q. Song   +3 more
semanticscholar   +3 more sources

Movement of Overlying Strata and Mechanical Responses of Shallow Buried Gas Pipelines in Coal Mining Areas

Applied Sciences
Damage to buried gas pipelines caused by mining activities has been frequently reported. Based on a case study from the Central China coal mining area, this research employs a scaled model experiment to investigate the movement of overlying strata in a room-and-pillar mining goaf.
Jiashu Han, Zhanguo Ma, Junyu Sun, Peng Gong, Pengfei Yan, Chuanchuan Cai, Mingshuo Xu, Tianqi She   +7 more
openaire   +3 more sources

Study on Overlying Rock Movement in Mining of Thin Bedrock Face with Thick Unconsolidated Strata

International Journal of Energy
China as a big country of coal production and consumption, coal strategic position is key. The condition of thick loose layer and thin bedrock is often encountered in mining. This special geological structure causes the mechanical behavior of coal seam after mining and the deformation and failure law of overlying rock to be different from the ...
Feifei Lu
openaire   +2 more sources

Research on subsidence law of overlying strata in full mining of extra-thick coal seam

Gong-kuang zidonghua, 2021
The problem of strong mine pressure during the mining of the near goaf working face in Datong coalfield is more serious than that of the first mining face.
WANG Jun1, ZHU Weibing1, XIE Jianlin2
doaj   +1 more source