高应力软岩巷道变形破坏特征及机理分析

Analysis on deformation characteristics and mechanism of high stress soft rock roadway

针对高应力软岩巷道变形量大、变形持续时间长、难支护等问题,以某矿南翼运输石门为工程背景,经过长期的井下观测,认为采动扰动作用下的高应力软岩巷道变形破坏特征呈现明显的阶段破坏特征,根据巷道围岩地质条件建立了分析模型,分析了导致巷道大变形失稳的力学机制,最终确定了某矿南翼运输石门巷道支护应遵循"刚柔互补、长短结合、及时主动、协调在控"的原则。

Aiming at the problems of large deformation,long deformation duration and difficult support of high stress soft rock roadway,taking Shimen transportation project in the south wing of a mine as the engineering background,after long-term underground observation,it is considered that the deformation and failure characteristics of high stress soft rock roadway under mining disturbance show obvious stage failure characteristics,based on the geological conditions of roadway surrounding rock,an analysis model is established and the roadway changes caused by mining disturbance are analyzed,the mechanical mechanism of shape instability finally determines that the supporting principle of the south flank transport stone gate roadway of a mine should follow the principle of "rigidity and flexibility complementary,combination of length and length, timely initiative,coordination and control".