摘要
针对和尚嘴煤业近距离煤层煤柱下掘进巷道变形大的问题,在介绍地质力学特征的基础上,采用数值模拟分析上部煤层不同方式采动后,采空区和煤柱在下部煤层的应力分布情况。分析煤柱下巷道变形特点和支护要点,结合高预应力强力锚杆支护理论,提出合理的锚网与锚索联合支护设计,现场试验效果明显。
Aiming at the problem of large deformation of roadway under coal pillar in the near coal seam of shanzui coal industry,based on the introduction of geomechanics characteristics,the stress distribution of goaf and coal pillar in the lower coal seam after different mining methods in the upper coal seam is analyzed by numerical simulation.Based on the analysis of deformation characteristics and supporting points of roadway under coal pillar and the theory of high-prestressed strong bolt support,a reasonable joint support design of anchor net and anchor cable is put forward.
作者
王利军
王升
Wang Lijun;Wang Sheng(Shanxi coal transport&marketing group xinzhou co.,Ltd.,xinzhou 034000,China;Safety technology center of jiangxi administration of coal mine safety,nanchang 330096,China)
出处
《江西煤炭科技》
2020年第1期149-152,共4页
Jiangxi Coal Science & Technology
关键词
近距离煤层
煤柱下
应力分布
高预应力
锚网与锚索联合支护
close seam
under coal pillar
stress distribution
high prestress
anchor net and cable support
