软岩条件下大断面巷道支护技术的实践与研究

摘要

This paper studies the deformation mechanism and the damage features of the large-section roadway surrounding rock under the conditions of soft rock,to determine reasonable and effective supporting forms and parameters,with the large-section gate of Gaojialiang coal mine as an example.Based on the roadway section shape and size,using the site monitoring and numerical simulation methods,the anchor,the net and the cable combined supporting system are designed.The results show that the supporting forms and parameters are effective to control the deformation of the surrounding rock,and the supporting is good,economic,reasonable, and reliable;the supporting system provides a basis for similar projects and some new ideas for resolving the difficult problems of large surrounding rock deformation and of poor stability,in supporting the soft rock roadway.%为进一步研究软岩条件下大断面巷道围岩的变形机制和破坏特征,确定合理有效的支护形式和支护参数,选取高家梁煤矿的大断面顺槽为研究对象,在确定巷道断面形状和尺寸的基础上,运用现场监测、数值模拟的方法,确定了锚-网-索联合支护系统.现场实践结果表明：该支护形式和支护参数有效地控制了围岩的变形,支护效果好,经济合理,安全可靠,具有较高的应用价值,此类支护系统为解决软岩内大断面巷道围岩变形大、稳定性差、巷道难以维护的问题提供了一条新思路.