六家矿煤巷底臌控制措施的FLAC~(2D)模拟分析

煤巷受掘进或回采影响,顶底板和两帮岩体产生变形并向巷道内移动,巷道底板向上隆起的现象称为底臌。目前普遍认为,随着支护技术的发展,已能将顶板下沉和两帮内移控制在某种程度内,然而对防治底臌仍缺乏经济而有效的办法1]。强烈的巷道底臌不仅增加大量维修工作,增大维护费用,而且还影响矿井安全生产。因此,研究巷道底臌机理及其防治措施一直是软岩巷道支护的重要课题。

FLAC Simulation and Analysis of Control of Roadway Floor Heave in Liujia Coal Mine

Roof and floor,both side of coal roadway produce deformation and move toward roadway under influence of tunneling or coal roadway,the phenomenon of floor uplifting is called floor heave.With the development of support technology,the roof sink and both sides of roadways moving have been controlled in some degree, but the prevention and treatment of floor heave has still a lack of economic and effective way.Strong roadway floor heave not only increases maintenance work, but also increases expense of maintenance even influence the security of the mine.So researching the mechanism and control measures of roadway floor heave is always the important subject of soft rock roadway supporting.