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张双楼矿主、副井井筒基岩段采用金属网锚喷作临时支护。井筒穿过的岩层以泥岩、砂质泥岩为主,部分鲕状泥岩层理交错,易片帮,属不稳定岩层。施工中视掘进工作面围岩的具体情况,决定掘砌段高,在软岩中水量较小(5～15吨/时)时,段高一般为20～30米;在中硬岩层中水量小于30吨/时时段高一般为30～40米;在硬岩中水量为30～50吨/时时,段高40～50米。采用金属网锚喷作临时支护,一般一个月掘砌一个段高,可保持围岩的完整和稳定,是一个安全可靠的施工方法。这种施工方法,正常情况下临时支护距
Zhang Shuanglou mine owners, deputy mine shaft bedrock metal mesh anchor for temporary support. Wellbore through the rock to mudstone, sandy mudstone, part of the oolite mudstone bedding staggered, easy to help, is an unstable rock. Depending on the specific conditions of the surrounding rock during excavation, the excavation section is determined to be high. When the amount of water in a soft rock is small (5-15 tons / hour), the section height is generally 20-30 meters. When the amount of water in a medium-hard rock is less than 30 tons / hour high is generally 30 to 40 meters; in the hard rock water is 30 to 50 tons / hour, paragraph 40 to 50 meters high. The use of metal mesh anchor spray for temporary support, generally a month digging a section of high, can maintain the integrity and stability of the surrounding rock, is a safe and reliable construction method. This construction method, under normal circumstances temporary support distance