It is remarkable that the residual strength of damaged immediate rock influence on the load of support influenced by balance rock layer.

平衡岩梁的变形对支架产生的影响受直接顶的岩性和其损伤后的强度的影响是明显的。

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When the rocks are fractured, roadway convergence is mainly due to expansion deformation of the surrounding rock within the fractured zone in a residual-strength state.

围岩处于破裂状态时，巷道收敛主要是由处于残余强度状态的破裂区围岩的碎胀变形引起的。

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