一、过去的施工概况 以往,矿井上下山巷道的永久支护,在坚硬稳定岩层中多采用光爆锚喷,在软岩或煤层中,采用料石砌璇和金属可缩性拱形支架加混凝土背板支护。一般,采用锚喷及砌(石旋)的巷道,其效果较好。用金属可缩性拱形支架加混凝土背板的巷道,常造成返工浪费。我们建设的范各庄矿、吕家坨矿、荆各庄矿,都有好几条永久斜巷设计采用金属可 First, the past, the construction overview In the past, the mine shaft of the roadway up and down the permanent support, hard and stable rock in the use of light burst anchor spray, soft rock or seam, the use of stone and metal Xuanzhe arch arched stent Concrete backboard support. In general, the use of anchor spray and puzzle (stone spin) roadway, the effect is better. With metal retractable arched bracket plus concrete backs of the roadway, often resulting in rework waste. We built Fangezhuang mine, Lu Tuotuo mine, Jinggezhuang mine, there are several permanent inclined lane design using metal