关键词: 近断层, 采动巷道, 非对称变形, 高强让压锚杆

Abstract: In response to the surrounding rock asymmetric deformation failure and supporting structure failure during excavation of Hongling Coalmine mining-induced roadway (15141 upper roadway) near a fault, numerical simulation and engineering application of its deformation failure mechanism and control technology have been studied. The results show that asymmetric mining-induced stress field near the fault zone, shearing slippage damage among the key parts of roadway and hulking deformation of coal and rock mass are the main causes of the asymmetric large deformation failure and supporting structure failure. The surrounding rock control technology of this kind of roadway, with reinforced support of key parts by using high-resistance yielding support and grouting reinforcement to control shearing slippage damage of key parts and improve its carrying capacity, weaken differences in deformation of key parts of surrounding rock and prompt uniform bearing on supporting structure, has been put forward to control asymmetric large deformation of the roadway by using asymmetric coupling support principle and high-resistance yielding bolt mechanical property. The research results have been successfully applied to a field trial, which means by using high-resistance yielding support and routing re- inforcement asymmetric support technology, deformation and asymmetry of the roadway can be controlled effectively and stability of surrounding rock can be improved substantially.

Key words: near fault, mining-induced roadway, asymmetric deformation, high-resistance yielding bolt