The stability of the surrounding rock mass depends upon its strength and deformation properties as well as the situation of stress convergence in it, and the key is the integrality of the rock mass.
洞库围岩稳定性一方面取决于洞库周边围岩应力集中的情况，另一方面取决于岩体强度和变形特征，其核心问题在于岩体完整性。
The paper also presents the process of orebody caving and associated rock mass fracturing, stress altering, and response of surrounding rocks.
同时，还给出具体工程崩落开采过程中的破坏形态、应力变化、围岩响应等。
Stress concentration occurs in surrounding rocks, while the maximum tension stress is less than the tensile strength of rock mass, so tensile crack does not take place.
动荷载作用下地下硐室群围岩出现较大的应力集中，但最大拉应力小于岩体的抗拉强度，地下硐室群围岩不会出现拉裂破坏。
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