Results 41 to 50 of about 16,961 (284)
Meitan xuebao, 2023 In the engineering practice of gob side entry retaining by roof cutting, the height and angle of roof cutting are the direct influencing factors, and the reasonable roof cutting parameters allowed by the hard roof with a wide range of roof thickness change have their particularity.
Xuhui XU +5 more
openaire +1 more source
Mechanism of Hydraulic Fracturing Cutting Hard Basic Roof to Prevent Rockburst [PDF]
Shock and Vibration, 2021 Rockburst is globally regarded as one of the most severe and complicated mining dynamic disasters to predict or control. Generally, the occurrence mechanism of rockbursts can be considered as a process of the elastic strain energy accumulation, emancipation, transmission, and occurrence.
Jianqiao Luo +6 more
openaire +2 more sources
Study on Fracture Behavior of Directly Covered Thick Hard Roof Based on Bearing Capacity of Supports
, 2023 Mine pressure at the working face is severe due to it being directly covered by a thick hard roof. To further investigate the technology of controlling the mine pressure of a thick hard roof, the upper working face of 13,121 in Gubei mine of Huainan ...
Qingwei Bu +4 more
core +1 more source
Scientific Reports, 2023 Based on the disaster characteristics and the geo-conditions at the scene, in this study, the occurrence mechanism of a serious rock burst accident that occurred in the Tangshan Coal Mine, China, was analysed.
Ying Chen +5 more
doaj +1 more source
Development status and Prospect of directional hydraulic fracturing technology for coal mine roof [PDF]
E3S Web of Conferences, 2020 Aiming at the harm and control methods of thick and hard roof in coal mine, the paper firstly analyzes the advanced control methods of thick and hard roof, such as directional shaped charge blasting roof control technology, hydraulic fracturing roof ...
Liangwei LI
doaj +1 more source
Unloading-slippage mechanism of coal bump in gateroad of longwall
Geohazard Mechanics, 2023 Coal bump seriously threatens the safe and efficient mining of coal, and the research on the occurrence mechanism of coal bump is of great significance. The roadway coal bump accounts for 86.8% of the total.
Jun Han +5 more
doaj +1 more source
Meitan kexue jishu, 2023 The mining of extremely thick coal seam form a large space stope, the fracture disturbance of hard roof spreads to a wide range, the working face weighting has the characteristic of “strong mine pressure”, it is obviously different from rock burst ...
YU Bin +3 more
doaj +1 more source
Research on Non-Pillar Coal Mining for Thick and Hard Conglomerate Roof
, 2021 This article introduces a new non-pillar coal mining technology (i.e., Gob-side Entry Retaining by Roof Cutting (GERRC)) under the condition of thick and hard roofs.
Manchao He +3 more
core +1 more source
Gong-kuang zidonghuaThe interactions within the composite hard roof structure above coal seams are highly complex, making it challenging to identify the main controlling layers for pressure relief via hydraulic fracturing. Using the 31104-1 working face of the Nalinhe No. 2
LI Yanjun
doaj +1 more source
Study on improving initial recovery rate by deep hole pre-splitting blasting of hard roof
, 2021 It is difficult for the hard roof to collapse in the initial mining period of a mine 3407 working face, which is easy to cause problems such as support impact load, roof impact pressure and abnormal emission of toxic and harmful gases, by measuring the ...
SHEN Yuxu, KANG Tianhe, YANG Yongkang
core +1 more source