Results 11 to 20 of about 159,695 (300)
Research on Non-Pillar Coal Mining for Thick and Hard Conglomerate Roof [PDF]
Energies, 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.
Xiaoyu Liu +3 more
doaj +4 more sources
Combined blasting for protection of gob-side roadway with thick and hard roof
Journal of Rock Mechanics and Geotechnical EngineeringThe deformation control of surrounding rock in gob−side roadway with thick and hard roof poses a significant challenge to the safety and efficiency of coal mining. To address this issue, a novel approach combining directional and non-directional blasting
Qiang Fu +6 more
doaj +4 more sources
Research on blasting technology for thick and hard roof fracturing in isolated island coal mine working face. [PDF]
Sci RepIn order to study the prevention and control technology for hard roof type coal burst in the isolated working face of the Chenjiashan coal mine, the 418 isolated working face was selected as the engineering case study.
Huang W, Jing G, Ma L, Zhao L, Wang S.
europepmc +5 more sources
International Journal of Coal Science & TechnologyThe complex stress environment in deep roadways, often exacerbated by thick and hard strata, frequently precipitates coal bursts, posing significant safety hazards.
Jinlong Zhou +5 more
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Ground fracturing pre-control technology for potential mine seismic risk of thick and hard roof
Meitan kexue jishu, 2023 Mines with thick and hard roof face high risks of mine seismic activities and mine pressure during mining, which easily leads to dynamic disasters in mines.
Shuwen WANG +5 more
doaj +2 more sources
Applied Sciences, 2021 The higher strength of a hard roof leads to higher coal pressure during coal mining, especially under extra-thick coal seam conditions. This study addresses the hard roof control problem for extra-thick coal seams using the air return roadway 4106 (AR ...
Zhe Xiang +4 more
doaj +3 more sources
Analysis and Application on Controlling Thick Hard Roof Caving with Deep-Hole Position Presplitting Blasting [PDF]
Advances in Civil Engineering, 2018 For the thick hard roof (THR) in Datong mining area, mining operations often led to large-scale hanging-roof and frequent and strong strata behavior, threatening mining safety seriously.
Baobao Chen, Changyou Liu
semanticscholar +3 more sources
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 +2 more sources
Research on the Reasonable Width of Coal Pillar Driving along Goaf under Thick Hard Roof
Applied SciencesThere are fewer studies on the width of coal pillar retaining under a thick, hard roof. This paper takes the thick limestone roof in the 10110 working face of Jinniu Coal Mine as the background, taking the reasonable coal pillar width and its stability ...
Wei Gu +3 more
semanticscholar +3 more sources
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesDeep mining stress increase and thick hard rock layer endowment drive rock body fissure expansion, leading to sudden fracture of the roof plate accidents. The roof slab of 11,129 working face in Zhangji Mine is a 16 m thick sandstone composite roof slab,
Jiaxin Dang +3 more
semanticscholar +3 more sources