摘要
在综采工作面末采阶段,回撤通道受采动影响剧烈,易发生围岩大变形而造成压架事故,严重影响工作面的搬家回撤效率。为了解决坚硬顶板难落问题,以铺龙湾矿5102工作面为研究背景,利用数值模拟对不同水力压裂参数下岩石压裂情况进行分析,经过对比确定最佳压裂段长度为600 mm,最佳钻孔直径为56 mm,根据模拟结果对巷道进行水力压裂,经过压裂后的工作面后方的覆岩顶板能够及时发生垮落,回撤通道垛式支架压力明显降低,整体巷道的应力环境得到了较大幅度的改善。
In the final mining stage of a fully mechanized mining face,the withdrawal channel is severely affected by mining,which is prone to large deformation of the surrounding rock and causing frame compression accidents,seriously affecting the efficiency of moving and withdrawing the working face.In order to solve the problem of hard roof falling,taking the 5102 working face of Pulongwan Coal Mine as the research background,the rock fracturing situation under different fracking parameters was analyzed by using numerical simulation.Through comparison,the optimal length of the fracturing section was 600 mm,and the optimal diameter of the drill hole was 56 mm.According to the simulation results,the roadway was fracking,and the overburden roof behind the fractured working face could collapse in time.The pressure of the stack support in the withdrawal channel has significantly decreased,and the overall stress environment of the tunnel has been greatly improved.
作者
曹伟
Cao Wei(Shanxi Coking Coal Group Shanxi Coal International Pulongwan Coal Industry Co.,Ltd.,Datong Shanxi 037000,China)
出处
《山西冶金》
CAS
2023年第7期234-235,245,共3页
Shanxi Metallurgy
关键词
综采工作面
回撤通道
围岩变形破坏
应力分布
支护设计
fully mechanized mining face
withdrawal channel
deformation and failure of surrounding rock
stress distribution
support design
