Cracks in the two roadway walls are extending to the depth in arc shape and diminish in a power function law.

巷道两帮围岩裂隙呈弧形向巷帮深处扩展，并按幂函数规律衰减；

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Cracks in the two roadway walls are extending to the depth in arc shape and diminish in a power function law.

巷道两帮围岩裂隙呈弧形向巷帮深处扩展，并按幂函数规律衰减；

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