兖州煤炭基地自1972年至1979年先后在北宿、兴隆庄、鲍店等矿井的十个井筒施工中采用锚喷支护作为临时支护或永久支护(详见表1),其井筒穿过的岩层大部分为砂岩、泥质页砂、粘土岩、石灰岩和煤,局部穿过膨胀性松软泥岩。一般临时支护1～3个月后进行永久支护,未曾发生过质量与安全问题。实践说明,采用临时锚喷支护是成功 Yanzhou Coal Base used the anchor and shotcrete support as temporary support or permanent support (see Table 1) in ten wellbores of Beixu, Xinglongzhuang and Baodian mines from 1972 to 1979. The wellbore wear Most of the overburden is sandstone, muddy sands, clay rock, limestone and coal, partially penetrating expansive loose mudstone. General temporary support 1 to 3 months after the permanent support, there has been no quality and safety issues. Practice shows that the use of temporary anchor spray support is successful