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井巷掘进面的炮眼排列,是掘进工作中的技术关键之一。它是提高爆破率、降低掘进成本、确保工程质量的一项重要技术措施。为了提高掘进效率,我们通过反复不断的实验总结,摸索了一套适用于我矿的炮眼排列方法,取得了一定的效果。我矿岩石有石英云母片岩和变质砂岩,岩质坚硬、致密、稳固(f=12～14),爆破性差,凿岩难度大,定为硬岩石。变质长石石英砂岩和云母片岩,岩质比较坚硬致密(f=
Wellbore tunneling surface of the blasthole arrangement, is one of the key technology in the tunneling work. It is to improve the blasting rate, reduce tunneling costs, ensure the quality of the project is an important technical measure. In order to improve the efficiency of driving, we through repeated experimental summary, explored a set of holes for mine arrangement method, and achieved some results. Mine rock with quartz mica schist and metamorphic sandstone, rock hard, dense, solid (f = 12 ~ 14), poor blasting, drilling difficult, as hard rock. Metamorphic feldspar quartz sandstone and mica schist, the rock is relatively hard and dense (f =