掘支平行作业滞后距离研究

Research on lag distance of parallel operation of tunneling and supporting

某矿8#煤层处于典型的弱胶结软岩地层中,以111082工作面皮带顺槽为工程背景,综合理论分析与数值模拟相结合的方法对弱胶结软岩巷道底臌变形机理进行了初步研究,模拟了不同二次支护距掘进面不同距离情况下顶板运移、两帮移近量,最终确定距离掘进面39m、进行二次支护比较合适。

No.8 coal seam in a mine has a typical weak cementation soft rock strata.Based on the engineering background of 111082 crossheading in working face,combining the theoretical analysis and numerical simulation,deformation mechanism of weak cementation soft rock roadway floor heave is studied,roof movement and both sides convergence are simulated under different distance from secondary supporting to the heading face.It is finally determined that 39 mdrivage distance is suitable for secondary supporting.