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随着煤炭浅部资源的慢慢枯竭,巷道开挖不断向深部发展,围岩破碎、软化日渐明显,巷道容易发生大变形、变形速度快、底拱严重等情况。通过采用钻孔摄像等仪器的测量及现场观测,总结了巷道严重失稳破坏的原因。基于这种情况,设计了一种新型“U”型棚-锚喷联合支护结构,通过主动与被动耦合的方法来阻止巷道失稳,得到了很好的支护效果。
With the depletion of shallow coal resources, the excavation of the roadway continues to develop in depth, and the surrounding rock crushes and softens gradually. The roadway is prone to large deformation, rapid deformation and serious bottom arch. Through the use of borehole imaging and other measurements and field observations, summarizes the causes of serious roadway failure. Based on this situation, a new type of “U” type roof-anchor spray combined support structure is designed, and the roadway is prevented from instability by the active and passive coupling methods, and a good supporting effect is obtained.