论文部分内容阅读
本文基于松软岩体的物理力学性质,结合几个矿山的实践,分析了松软岩体中井巷围岩的工程特性。松软岩体具有明显的塑性变形及蠕变变形,在含粘土矿物的情况下,还具有一定的膨胀变形,因此这类岩体中的地压以蠕变形变地压及膨胀形变地压为主。对软岩巷道变形的分析表明,这类岩体中控制井巷围岩稳定及地压显现的决定因素并不是岩体中的地质结构面,而主要是由岩性所决定的力学性质及其物质成分。本文亦总结了工程实践中为保证这类岩体中井巷围岩的稳定而常用的一些工程技术措施。
Based on the physical and mechanical properties of loose rock mass and the practice of several mines, the engineering characteristics of surrounding rock in soft rock mass are analyzed. The soft rock mass has obvious plastic deformation and creep deformation. In the case of clay minerals, it also has some expansion deformation. Therefore, the ground pressure in such rock mass is dominated by creep deformation and compression deformation . The analysis of the deformation of soft rock roadway shows that the determinants of the surrounding rock stability and ground pressure of the controlled well in such rock mass are not the geological structural plane in the rock mass but mainly the mechanical properties determined by lithology and their Material composition. This paper also summarizes some engineering measures commonly used in engineering practice to ensure the stability of surrounding rock in such rock mass.