在煤矿井下掘进工作面,由于矿工钢支护难度较大,支护成本较高,影响掘进工作面的施工进度,因此井下掘进巷道必须根据现场围岩情况进行支护方式合理变更。在围岩相对稳定、层节理较发育的地段,采用锚喷支护,加快了掘进进度,降低了支护成本费用,实现了一次成巷和安全生产。 In coal mining face, due to the mine steel support more difficult, higher support costs, affecting the progress of heading face construction, underground tunneling must be based on the situation of surrounding rock to carry out reasonable changes in support methods. In the relatively stable surrounding rock, layer joints more developed sections, the use of anchor and shotcrete support, speeding up the progress of excavation, reducing the cost of support, to achieve a lane and safety production.