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钢轨组合支架维护破碎型脉外大巷 锦屏磷矿西山矿区有一段底盘脉外运输巷掘进在破碎带中,岩层极不稳固。该处大巷自-50米中段至-350米中段均采用混凝土块砌(石旋)支护。由于巷道服务时间长,加上开采深度不断增加,地压加大,多次发生巷道顶板、侧帮压塌,影响生产,增加了维修工作量。我们曾采用钢轨、锚杆、锚杆喷浆等多种措施,效果均不好。1982年以后试用钢轨组合支架,取得较好效果。
Rail combination support to maintain broken veins Jinping phosphate rock Xishan mining area has a chassis outside the transport tunnel driving in the broken belt, the rock formation is very unstable. The section of the main road from -50 meters to 350 meters mid-section are used concrete block puzzle (stone spin) support. As roadway service for a long time, coupled with the continuous increase in mining depth, increased pressure, roof roadway many times, the side of the collapse, affecting production, increased maintenance workload. We have used a variety of measures such as rail, bolt, bolt shotcrete, the effect is not good. After 1982 trial rail combination bracket, achieved good results.