榆林地方煤矿开采区地面塌陷及形成机理

Formation Mechanism about Land Collapse of Local Coal Mining Area in YuLin

榆林地方煤矿多采用窄条带保水采煤技术,尽管实现了保水开采,但随着煤柱的风化、变形,采空区顶板仍然出现了下沉现象。调查了榆林地方煤矿开采区的7处煤矿的地面塌陷与变形现状,简要阐述了7处煤矿的生产情况、采空区地面塌陷与地裂缝发育,分析了其形成机理。

Local coal mines usually adopt narrow strip mining technology with water protection in Yulin, despite the realization of coal mining with water protection, but with weathering and deformation of the coal pillar, coal roof still appears to sink. Investigated the ground subsidence and deformation of 7 coal mines in Yulin local coal mining area, briefly described the production situation of 7 coal mines, ground collapse and ground fissures in coal mining area, and analyzed the formation mechanism.