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应用FLAC计算软件中的应变软化模型,通过数值计算研究了牛马司煤矿深部软岩巷道围岩应力与围岩性状的关系,提出了深部软岩巷道内、外承载结构模型,分析了承载结构的发展过程,探讨了巷道两帮承载结构与深基点位移分布的关系.将深部软岩锚注联合支护巷道两帮围岩位移分布分为松动区、锚固区、松弛区和基本稳定区4个区,松弛区围岩应力提高幅度较快,外承载结构的内边界处于该区内,基本稳定区是外承载结构的主体.提出了基于深基点位移的巷道外承载结构内边界的确定方法.图6,表4,参14.
The strain softening model in FLAC calculation software is applied to study the relationship between surrounding rock stress and surrounding rock characteristics of deep soft rock roadway in Niumasi coal mine by numerical calculation. The inner and outer bearing structure models of deep soft rock roadway are proposed, The relationship between the bearing structure and the displacement of deep foundation is discussed.The displacement distribution of the surrounding rock of the two supporting tunnels in the deep soft rock bolt and grouting is divided into four zones of loosening zone, anchoring zone, relaxation zone and basic stability zone The stress of surrounding rock in the area and the slack area increases rapidly, the inner boundary of the outer bearing structure lies in this area, and the basic stability area is the main part of the outer bearing structure. The method of determining the inner boundary of the bearing structure outside the roadway based on the deep base point displacement is proposed. Figure 6, Table 4, reference 14.