【摘要】 锚杆支护是煤矿采准巷道的重要支护方式 ,沿空留巷技术是回采巷道支护技术改革的主要方面。笔者将两种技术相结合 ,用于保证回采巷道的稳定。在现场矿压观测的基础上 ,讨论了支承压力分布规律和窄煤柱护巷机理 ,运用极限平衡理论计算出护巷煤柱宽度 ,同时结合数值分析和现场巷道变形以观测结果 ,实践证明 ,只要设计参数合理 ,施工质量满足要求 ,沿空窄煤柱锚网带支护技术就可以保证回采巷道的稳定更多还原

【Abstract】 Rock bolting is an important supporting method in development entry, and the gob’s side entry retaining technique is the primary aspect of innovation for supporting technique in extraction opening. In this paper, these two techniques are combined to guarantee the stability of extraction opening. Based on the field observation of rock pressure, the mechanism for narrow pillar to protect the roadway and the distribution regularity of bearing pressure are discussed. The pillar width is calculated by way of maximum balance theory. Combined with numerical analysis and field observation of deformation, if the design parameters were selected reasonably and the construction quality was guaranteed, the belt and bolting wire mesh along the neighboring sublevel could support the stability of the roadway.更多还原