强烈动压巷道高预应力锚杆锚索组合支护技术研究

Research on the combined supporting technology of high pre- stressed anchor cable in strong dynamic pressure roadway

马兰矿10704工作面掘进过程中受相邻10702回采强烈动压影响,存在巷道围岩变形严重、煤体破碎等问题,巷道支护难度极大,为此分析了强烈动压巷道变形与受力特征,提出了10704轨道巷高预应力锚杆锚索组合支护设计,较好地解决动压条件下锚杆支护巷道掘进难题。

Since the influence of the strong dynamic pressure, the gateway surrounding rock is severely deformed and the coal is broken, the gateway driving is so difficult when we are driving in gateway next to the coal mining face. In order to solve the similar problem of No. 10704 wrking face next to No. 10702 in the MaLan mine ,we analyse the deformation and the stress characteristics of the strong dynamic pressure gate- way ,raise the design of the combination support technology of high prstress bolt and anchor cable in No. 10704 track gateway ,solve the problem of the bolting gateway driving under the condition of the strong dynamic pressure.