坚硬顶板、软弱底板条件下切顶卸压沿空留巷效果研究

Study on Effect of Roof Cutting to Relieve Pressure and Keep Roadway along Gob under Condition of Hard Roof and Weak Floor

基于切顶卸压沿空留巷技术探究在坚硬顶板、软弱底板条件下的切顶卸压沿空留巷效果。通过对现场数据的采集和分析,研究36层里部右二面在该项技术指导下的覆岩运动规律、支承压力分布规律和留巷段围岩稳定情况。结果表明,该项技术在本工作面应用效果良好,有效切断了工作面与巷道上方顶板的应力传递路径,工作面采空区顶板垮落未引起顶板大面积变形,顶板锚杆、锚索支护状态良好。

Based on the technology of roof cutting and pressure relief gob-side entry retaining, the effect of roof cutting and pressure relief gob-side entry retaining under the conditions of hard roof and weak floor was explored. Through the collection and analysis of field data, the overburden movement law, abutment pressure distribution law and surrounding rock stability of the left and right sides of 36layers under the guidance of this technology are studied. The results show that the application effect of this technology in this working face is good, and the stress transmission path of the roof above the working face and the roadway is effectively cut off. The roof caving in the goaf of the working face does not cause large area deformation of the roof, and the roof bolt and anchor cable support are in good condition.