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为研究锚固支护条件下深部巷道围岩是否产生分区破裂以及岩锚支护对分区破裂的影响,以淮南矿区丁集煤矿深部巷道为工程背景,进行了锚固支护条件下高地应力深部巷道开挖三维地质力学模型试验。通过模型试验发现围岩应变呈现波浪形变化规律以及洞周锚杆受力出现拉压交替变化现象。通过与未加锚支护模型试验结果的对比,揭示锚杆对抑制巷道围岩分区破裂具有重要的作用,这为深入分析深部巷道开挖锚固特性和优化深部巷道支护设计奠定了坚实的试验基础。
In order to study whether the surrounding rock of the deep roadway under the condition of anchorage and support is affected by the sub-zone rupture and the rock-anchor support to the sub-zone rupture, taking the deep tunnel of Dingji coal mine in Huainan mining area as the engineering background, Digging 3D geomechanical model test. Through the model test, it is found that the strain of the surrounding rock shows the wavy pattern and the phenomenon of alternating tension and compression of the bolt around the hole. The comparison of the results with those of the unsupported model shows that the bolt plays an important role in suppressing the division of the surrounding rock in the roadway, which lays a solid foundation for further analysis of the anchoring characteristics of the deep tunnel and optimization of the design of deep tunneling support basis.