摘要
为保障3417工作面沿空留巷松软围岩的稳定,采用数值模拟分析了硬、中硬及松软围岩下留巷的变形特征,结合模拟结果进行支护方案设计,确定加强巷道顶板及煤柱帮的支护,并进行留巷围岩变形观测作业。结果表明:回采期间,留巷围岩的顶底板及两帮最大移近量分别为452mm和224mm,保障了留巷围岩的稳定。
In order to ensure the stability of the soft surrounding rock of 3417 working face,the deformation characteristics of the remaining roadway under the hard,medium hard and soft surrounding rock are analyzed by numerical simulation.Combined with the simulation results,the support scheme is designed to strengthen the support of the roadway roof and coal pillar,and the deformation observation of the surrounding rock of the remaining roadway is carried out.The results show that during the mining period,the maximum displacement of the roof and floor and the two sides of the surrounding rock is 452mm and 224mm respectively,which guarantees the stability of the surrounding rock.
作者
翟晓飞
Zhai Xiao-fei(Shanxi Xinyuan Coal Co.,Ltd.,Shanxi Jinzhong 030600)
出处
《山东煤炭科技》
2020年第6期69-71,74,77,共5页
Shandong Coal Science and Technology
关键词
松软
变形
沿空留巷
soft
deformation
gob side entry retaining
