摘要
坚硬顶板在工作面回采后易形成大面积悬顶,从而引发顶板安全事故,当煤层埋深浅、顶板岩层厚度较大时,尤为如此。本文以米山煤业某矿15112工作面为例,提出对15112回风巷顶板进行水压致裂的方法,切断巷道与采空区顶板岩层的力学传递路径,改善巷道围岩力学环境。现场实践表明:水压致裂技术不仅可以软化巷道顶板,避免采空区大面积悬顶,还可以有效控制巷道大变形。
The hard roof is prone to form a large-area suspended roof after the mining face,which can cause roof safety accidents,especially when the coal seam is shallow and the roof rock layer is thick.Taking the 15112 working face of a mine in Mishan Coal Industry as an example,this paper proposes a method of hydraulically fracturing the roof of 15112 ventilation roadway,cutting off the mechanical transmission path between the roadway and the roof strata in the goaf,and improving the mechanical environment of the roadway surrounding rock.Field practice shows that:hydraulic fracturing technology can not only soften the roof of the roadway,avoid large-area suspended roof in the goaf,but also effectively control the large deformation of the roadway.
作者
郭军鹏
Guo Junpeng(Shanxi Anmei Coal Mine Design Engineering Co.,Ltd.,Shanxi,Taiyuan 030006)
出处
《江西煤炭科技》
2021年第3期13-15,共3页
Jiangxi Coal Science & Technology
关键词
浅埋煤层
坚硬顶板
水压致裂
悬顶面积
顶底板移近量
shallow overburden
hard roof
hydraulic fracturing
suspended roof
roof and floor approach
