摘要
为了提高留巷的稳定性,减小实体煤帮和充填墙体承担的荷载,通过UDEC数值模拟的方法,分别对未切顶卸压爆破顶板和爆破顶板前后顶板破断情况以及巷道变形情况进了研究分析。表明:切放顶爆破卸压后充填墙体和实体煤帮压缩变形较小;实体煤帮、充填墙体、巷道两帮、最大变形量均显著减小;顶板下沉量、底鼓量也明显减小。
In order to improve the stability of gob-side entry, and reduce the undertaking load in the side of solid coal and the side of filling wall, through the method of numerical simulation UDEC, respectively analyzed the roof breaking and roadway deformation condition before and after blasting pressure relief, the result showed that the compression deformation of coal and filling wall is smaller after used the roof blasting pressure relief, the maximum deformation decreased; roof subsidence, floor heave is also decreasing.
作者
张治福
Zhang Zhi-fu(Xishan Coal and electricity production technology department, Shanxi Taiyuan 030053)
出处
《山东煤炭科技》
2017年第3期25-27,29,共4页
Shandong Coal Science and Technology
关键词
切顶
卸压
沿空留巷
UDEC
breaking roof
pressure relief
gob-side entry retaining
UDEC
