复杂多变地质条件下巷道支护方式的设计

煤矿开采转入下水平以后,地质条件由简单到复杂,各种围岩应力交错显现,矿山压力显著增大,给巷道支护带来较大的困难。阐述了巷道围岩应力,针对煤矿复杂多变的地质条件,提出对传统的支护方式进行重新设计,采用大断面金属支架、可伸缩金属支架、锚网喷支护技术等,在巷道支护方面起到了很好的效果。

Tunnel Supports Design under Complex Changeable Geological Conditions

When coal mining is carried out at a deeper level,the geological conditions become more complex with various adjacent formation stresses interlocking each other and mining pressure greatly improved,which causes major difficulty for tunnel supports.The paper elaborates the tunnel adjacent formation stress and proposes a redesign to the traditional supports based on coal mine complex and changeable geological conditions.The use of big cross section metal supports,expandable metal supports and anchor net supporting technology proves desirable in the tunnel supports.