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坑道钻在国外已得到广泛应用，国内采矿部门也得到一定程度发展。事实证明，采用坑道钻一方面可以节省钻探工作量，使深钻变为浅钻，并避开地表复盖层，简化钻探工艺，从而加快钻探速度。另一方面坑道钻不仅可以用来超前钻探，摸清地质情况，而且在岔道施工时还可以钻代坑，从而降低成本。为了使坑道钻尽快在地质部门推广应用，且在使用过程中少走和不走弯路，并取得最好的经济效益，我们进行了一次坑道钻调研，现将有关情况综述如下：一、坑道钻的施工地层与使用情况（一）地层目前冶金系统的绝大部分金属矿山都在使用坑道钻。地质系统仅四川地矿局使用较多，他们先后在
Tunnel drilling has been widely used in foreign countries, the domestic mining sector has also been a certain degree of development. It has turned out that using tunnel drills saves drilling effort on the one hand and changes from deep drilling to shallow drilling and avoids surface overburdens, simplifying the drilling process and speeding up drilling. On the other hand, tunnel drilling can not only be used for drilling ahead, find out the geological conditions, but also can be replaced when the fork in the pit, so as to reduce costs. In order to make the tunnel drill as soon as possible to promote the application in the geological department, and in the course of using less and without detours, and achieve the best economic benefits, we conducted a tunnel drill research, the situation is summarized as follows: First, the tunnel drill Construction Stratum and Usage (I) Strata Currently, most metal mines in the metallurgical system are underway drilling. Geological system, Sichuan Bureau of Minerals only use more, they have