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1979年12月15日至21日,铁道部基建总局、科技委、铁道学会工程委员会隧道学组、铁路基建科技情报网共同主持,在铁四局六处(安徽休宁)召开了隧道喷锚经验交流会。喷锚支护是国家建委要求煤炭、冶金、铁道、水电等部门重点推广的新技术之一。铁道部门自六十年代开始,已在新建隧道、既有隧道病害整治、桥基护壁及边坡加固等工程中采用。近年,喷锚支护在稳定围岩隧道中取得成果后,又在软弱围岩隧道进行了试验。会议在参观下坑隧道试验工地后,重点介绍了这座隧道在软弱围岩中采用光面爆破、喷锚支护进行大断
December 15, 1979 to December 21, the Ministry of Railways Infrastructure Administration, Science and Technology Commission, Railway Society Engineering Committee tunnel group, Railway Infrastructure Science and Technology Information Network co-chaired the iron four in six (Anhui Xiuning) held a tunnel spray anchor Exchange of experience. Shotcrete and anchor support is one of the new technologies that the State Construction Commission requires to focus on the promotion of coal, metallurgy, railway, hydropower and other departments. Since the 1960s, the railway department has adopted new tunnels, such as renovation of tunnels, reinforcement of the bridge foundation and slope reinforcement. In recent years, spray anchor support in the stability of the surrounding rock tunnel results, but also in soft rock tunnel test. After the meeting visited Xiakeng Tunnel Experimental Site, the conference focused on the use of smooth blasting in soft surrounding rock of this tunnel,