高应力大断面煤巷锚杆索桁架系统试验研究

高应力构造区大断面煤巷围岩控制技术是煤矿巷道工程中亟需研究的问题之一。以峰峰集团新三矿废矸充填复杂困难煤巷为典型研究对象，综合现场调研和数值模拟分析结果得出高应力作用下大断面煤巷变形破坏特征，提出一种基于“索-拱”结构为核心的高应力煤巷围岩控制系统-锚杆索桁架，分析该支护系统基本结构，设计流程及支护预应力场分布特征，在新三矿某一置换煤巷开展工业性试验，研究结果表明，新型支护系统结构稳定，巷道围岩控制效果良好，对类似困难巷道支护具有一定的理论和实用参考价值。

Experimental study of bolt and cable truss system for large cross-section coal roadways under high stress

The surrounding rock controlling technology of large cross-section coal roadways under high stress in tectonic region is one of the problems to be desiderated to solve in coal mines. Aiming at the large deformation of the typical complex coal roadway in Xinsan coal mine of Fengfeng Company, in combination with the field observation and numerical simulation analysis integrated the results of large-section coal roadway under high stress deformation and failure characteristics, and then a type of surrounding rock controlling system called high strength bolt and cable truss is proposed on the basis of the core structure “cable and arch”. The basic structure, design process and prestress distribution characters of roof strata with the controlling system are analyzed. A field test is done on replacement coal roadway for filling waste gangue. Research results show that supporting structures of the new style system are stable; and the surrounding rock of the roadway is controlled well, which has theoretical and practical value to the supporting technology of analogous complex roadways.