软岩巷道底鼓变形防治技术研究

针对回坡底煤矿1021巷道巷道受煤柱应力传递影响出现底鼓现象等问题,采用现场实测手段研究了围岩应力,得到靠煤柱侧的底板围岩中产生了较大的应力集中现象,导致围岩变形量较大;并针对性采取了一侧巷道布置卸压孔、另一侧布置加固孔的底鼓防治措施;通过现场应用,得到当巷道受到采动影响时,防治段巷道与未经过底鼓防治处理段巷道相比底板变形量较小。

Research on prevention and control technology of floor heave in soft rock roadway

In order to solve the problem of floor heave in 1021 roadway of Huipodi coal mine under the influence of coal pillar stress transfer,the field measurement method was used to study the surrounding rock stress.It was found that the large stress concentration phenomenon occurred in the floor surrounding rock near the coal pillar side,which led to the large deformation of the surrounding rock.The floor heave prevention measures were taken by arranging pressure relief holes on one side of the roadway and arranging reinforcement holes on the other side Through field application,it is concluded that when the roadway is affected by mining,the floor deformation of the roadway in the prevention section is smaller than that in the roadway without floor heave prevention and treatment.