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鹤煤五矿三水平轨道下山地处向斜轴部,构造应力大,且受到上部采空区强烈的开采扰动,巷道变形严重,生产接续十分紧张。通过对该巷道工程地质条件的综合分析和地质力学评估,研究了该巷道的变形破坏机理及变形力学机制,并针对新开巷道大断面交岔点提出了以底角锚杆控制底臌的锚网索+柔层桁架耦合支护方案,且对该方案主要技术环节进行了优化,并通过数值模拟和现场实施验证了方案优化的准确性和可靠性。实践证明:该方案可以充分发挥锚网索和桁架的耦合支护作用,最大限度地发挥围岩的自承能力,有效控制巷道变形,为矿井的安全高效生产创造了条件。
Hebi Coal Mine three horizontal orbit downhill is located in the syncline axis, tectonic stress, and by the strong mined-out area of the upper mining disturbance, serious deformation of the roadway, the production continued very tense. Through the comprehensive analysis of the engineering geological conditions and the geomechanical assessment of the roadway, the deformation and failure mechanism and deformation mechanics mechanism of the roadway are studied, and the anchors of the bottom corner anchor with the bottom corner anchor Mesh cable + soft layer truss coupling support scheme, and the main technical aspects of the program are optimized. The accuracy and reliability of the scheme optimization are verified by numerical simulation and on-site implementation. Practice has proved that this scheme can make full use of the coupling support function of anchor net and truss, exert the self-supporting capacity of surrounding rock to the maximum extent, effectively control the deformation of roadway, and create the conditions for the safe and efficient production of mine.