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根据煤矿现场复杂高应力脆性围岩巷道顶板变形、破坏实际,对其岩石试样进行了卸荷破坏三轴实验,研究深部复杂高应力脆性破坏围岩的变形、破坏机理及其力学特性。实验研究结果表明,在深部复杂高应力环境下,中等稳定脆性围岩巷道顶板破坏属于卸荷不平衡力引起的变形破坏,必须采用围岩—支护体之间的刚度、强度、变形相互耦合支护技术,才能有效防止巷道顶板发生剪切、错动或断裂破坏。
According to the deformation and failure of tunnel roof in complex high stress and brittle surrounding rock in coal mine, unloading and failure triaxial tests are carried out on the rock samples to study the deformation, failure mechanism and mechanical characteristics of surrounding rock with complex high stress and brittle failure. The experimental results show that under the conditions of deep complex and high stress, the roof destruction of the middle-stable brittle rock roadway belongs to the deformation and failure caused by unloading unbalanced force, and the stiffness, strength and deformation of the surrounding rock-support body must be coupled with each other Support technology, in order to effectively prevent the roadway roof shear, staggered or fracture damage.