卸压巷道位置和尺寸对下部巷道底鼓影响规律研究

Study on Influence of Location and Size of Relieving Roadway on Tunnel Bottom Drum

底鼓是一种在软岩巷道或深部煤炭开采各种巷道中经常遇到的现象。对于高应力下开采环境,巷道围岩受到高应力作用,顶底板及两帮均向巷道内侧移动,对巷道稳定性和安全造成巨大影响。开挖卸压巷可以有效减小巷道围岩的移近量,研究卸压巷布置方位和尺寸对其下部巷道变形情况的影响规律具有重要的工程指导意义。基于ANSYS数值模拟软件,针对这一问题进行了细致深入的研究,得到了卸压巷位置和卸压巷的几何尺寸对下部巷道两帮移近量和底鼓量的影响规律,从而为软岩巷道和高应力巷道的底鼓控制提供一定的工程参考。

Heaving floor is a phenomenon which often encountered in soft rock or deep coal mining. For mining under high stress,surrounding rock is in high stress,and the bottom and the two side help both shift to the tunnel inside,having a significant impact on the tunnel stability and security. Relieving roadway can reduce the deformation amount effectively. Study on the layout orientation and size if the relieving roadway,has an important guiding significance for the deformation of its bottom roadway. Based on the numerical simulation software of ANSYS,thorough research was performed for the problem and the influence of the layout orientation and size to the deformation of its bottom roadway was obtained,providing an engineering reference for the control of soft rock roadway and high stress roadway floor heave.