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隧道在导坑、扩大及刷帮的掘进中突破了施工框框,采用了炮眼装药取消炮泥堵塞,经过试验有了成效。其效果是:节约劳动力,降低了造价,缩短循环时间提高了工效,过去导坑一次装药约需30分钟,取消炮泥后仅用20分钟。装药方法:1.先装一节(或两节)底药,药包底对着眼底,接着装引药。2.雷管对着眼底,引药倒装,即
The tunnel broke through the construction frame during the pilot excavation, enlargement and brushing excavation, and the use of the blasthole charge to cancel the blockage of the stem gun was effective after the test. The effect is: to save labor, reduce the cost, shorten the cycle time to improve the work efficiency, past the pilot a charge takes about 30 minutes, cancel the gun after only 20 minutes. Method of loading: 1 first install a section (or two) of the bottom medicine, the bottom of the package against the fundus, then loaded with medicine. 2. Detonator against the fundus, cited medicine flip, that is