In order to improve the efficiency of roadway tunneling across fault,the technical scheme of roadway tunneling and surrounding rock supporting measures were developed based on the engineering background of 8202 transport crossheading tunneling across fault F3 and the site conditions.The method of"blasting+integrated excavator"was adopted to improve the efficiency of rock breaking and loading and transport,and the support method of"advance grouting+roof grouting+anchor net cable+steel shed"was adopted to ensure the stability of the roof during the transportation crossheading tunneling and the stability of surrounding rock after the support.After the engineering application,the transport crossheading can maintain a 6 m/d tunneling speed in the F3 fault affected area,during which the roof and roadway wall remained stable,realizing a safe and rapid crossing of the fault and improving the production efficiency of the coal mine.
关键词
巷道掘进/过断层/围岩支护/破碎围岩
Key words
roadway tunneling/crossing fault/surrounding rock support/broken surrounding rock
维普
万方数据