煤巷高强预应力锚杆支护技术与应用

High-Strength and Pretension Bolting Support of Coal Roadway and Its Application

结合锚杆使用中存在的问题,提出了煤巷高强预应力锚杆支护技术,分析了高强预应力支护控制顶板离层的机理,提出了包括高性能预拉力锚杆、钢绞线预拉力桁架和M型钢带等几种新型实用的预应力控制手段,介绍了谢桥矿复合顶板沿空掘巷采用预应力支护技术的实用效果.

The general idea of pretension bolt with high strength (PBHS) is put forward by analyzing the weakness of the commonly-used bolt supporting. The function of PBHS to control the separation of stratified separation in coal roadway is analyzed. An effective control technology of pretension, which includes pretension bolts of high-quality, pretension trusses to be made of steel strand, and M-steel strands, is well developed. Finally an engineering instance of pretension supporting for road along next gob in Xieqiao coalmine is discussed.