煤炭与化工2026，Vol.49Issue(7)：9-14,27,7.DOI:10.19286/j.cnki.cci.2026.07.002
急倾斜大采高俯伪斜综采工作面顶板破坏机理与围岩控制技术
Mechanism of roof failure and surrounding rock control technology in steeply inclined longwall face with large mining height and oblique downward layout
李正军1
作者信息
- 1. 四川川煤华荣能源有限责任公司,四川成都 610091
- 折叠
摘要
Abstract
Aiming at the unclear roof failure mechanism,poor stability of hydraulic supports and prominent gangue flying risks existing in fully mechanized mining faces of steeply inclined seams with large mining height,No.31111 fully mechanized mining face with oblique downward layout in Shidonggou Mine was taken as the research background.Numerical simulation methods were adopted to reveal the distribution laws of surrounding rock stress and evolution characteristics of plastic zones under seam dip angles of 45°,56° and 65°.On this basis,a fully mechanized mining scheme centered on oblique downward layout was proposed.The matching and type selection design of three key mining machines focusing on support lightweighting were carried out,in which key technologies including advance grouting for faults,precise face conversion and comprehensive gangue flying prevention were integrated.The numerical simulation results showed that the failure depth and vertical stress of the roof at the lower part of the working face were always larger than those at the upper part,and such asymmetric characteristics became more obvious with the increase of dip angle.The maximum roof failure depth at the lower part reached 21.7 m at the dip angle of 56°.Field applications demonstrated that the technical system based on the research findings guaranteed a total advancing distance of 426 m for the working face.The maximum monthly advancing distance was 85 m,and the average daily output exceeded 1 500 tons.No personal injuries caused by flying gangue occurred throughout the operation.Safe and efficient fully mechanized mining was realized under complex geological conditions with an average dip angle of 56°.The research results were provided as theoretical references and practical examples for coal mining under similar geological conditions.关键词
急倾斜煤层/大采高/俯伪斜布置/围岩控制/数值模拟/支架轻量化Key words
steeply inclined coal seam/large mining height/descending oblique layout/surrounding rock control/numerical simulation/support lightweight design分类
矿业与冶金引用本文复制引用
李正军..急倾斜大采高俯伪斜综采工作面顶板破坏机理与围岩控制技术[J].煤炭与化工,2026,49(7):9-14,27,7.
