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介绍了沿空留巷围岩应力分布及顶板运动特性,提出了沿空留巷的设计机理与方法。在城山矿现场观测的基础上,详细分析了造成沿空留巷石墙侧及实体煤顶板变形总量及速度不同步,峰值差异大的原因,并指出了沿空留巷围岩变形控制关键技术是控制石墙支护与实体煤支护的强度与刚度的匹配,并与顶板、实体煤形成共同承载体系,以充分发挥围岩自承能力。
The stress distribution and roof movement characteristics of gob-side entry retaining roadway are introduced, and the design mechanism and method of gob-side entry retaining are proposed. Based on the on-site observation of Chengshan Mine, the causes of the unsymmetrical total deformation and velocity difference between the stone wall and solid coal roof of gob-side entry retaining roadway are analyzed in detail. The key points of the deformation control of gob-side entry retaining roadway are pointed out The technology is to control the matching of the strength and rigidity of the stone wall support and the solid coal support and forms a common bearing system with the roof and the solid coal to fully exert the self-bearing capacity of the surrounding rock.