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在开凿井巷时,其周围的岩石常发生冒顶、片帮、底鼓等现象,这是由于岩石内部有作用力,称为岩体应力,这种应力超过了岩石自身的抵抗力便发生破碎。为了维护井巷,必须研究岩体应力与岩体性质的相互作用。第一讲.岩体应力与岩体性质一、原岩应力及变形岩体应力一方面由于自重所产生,另一方面是由于地质构造所产生。上部岩体重量作用下所产生的单位面积内力称为自重应力(如图1)。铅垂方向的
In the digging of the shaft, the rocks around the roof often occur, such as roof, sheet, bottom drum and other phenomena, which is due to the rock internal force, known as rock stress, which exceeds the rock’s own resistance will be broken . In order to maintain the well, it is necessary to study the interaction between rock mass stress and rock mass properties. Lecture 1. Rock Stress and Rock Properties First, the original rock stress and deformation of rock stress on the one hand due to self-weight generated, on the other hand is due to the geological structure. The upper part of the rock mass under the force per unit area generated by self-weight stress (Figure 1). Vertical direction