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为了加快我矿竖井建设,我们应用优选法改进了炮眼排列,对提高掘进效率、降低材料消耗都取得了较好的效果。(一)竖井下掘概况井筒全长234米,毛断面直径6.4米,岩石为中等硬度(f=5～6)的灰岩。根据设备能力与施工条件,竖井下掘大体分为两段。第一段由于当时-65米中段已经形成,故采用吊罐小断面上掘,而第二段(-65米至-125米)采用全断面下掘的施工方法。
In order to speed up mine shaft construction, we apply the optimization method to improve the borehole arrangement, to improve the tunneling efficiency and reduce material consumption have achieved good results. (A) shaft down the profile The total length of 234 meters wellbore, hair section diameter of 6.4 meters, the rock is medium hardness (f = 5 ~ 6) limestone. According to equipment capacity and construction conditions, shaft digging can be roughly divided into two sections. As the first paragraph of the mid-section of -65 meters was formed at the time, a small section of crane tank was used for digging while the second section (-65 meters to -125 meters) was used for construction with full section digging.