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煤矿深部开采巷道与浅部巷道的主要差别是围岩存在破裂区,也是深部巷道支护的重点之一。由于破裂区的存在,巷道支护应以护为主,防止围岩破裂范围扩大,巷道失效。理论与实践证明巷道底角采用弧形,加强断面底角与肩部等关键部位的支护强度,使巷道整体收缩变形,可有效防止深部巷道的破坏。
The main difference between deep mining roadway and shallow mine roadway in coal mine is the existence of rupture zone of surrounding rock, which is also one of the focuses of deep roadway support. Due to the existence of the rupture zone, roadway support should be mainly protected to prevent the surrounding rock from expanding and the roadway fails. The theory and practice prove that the bottom corners of the roadway are arc-shaped, and strengthen the support strength of the key parts such as the bottom corner and the shoulder of the section to make the whole tunnel shrink and deform, which can effectively prevent the destruction of the deep laneway.