论文部分内容阅读
近年来,国外在地质勘探工作中,坑道钻进所占比重不断增加。美国目前开动的地下坑道钻机约为500台,年进尺达150万米左右。与地表钻进相比,采用地下坑道钻进方法(包括垂直及水平钻进),不仅可以节省钻进工作量,而且可以根据岩层形状和特征,在必要的层位布置钻孔,以便取得更为准确的地质资料。本文概括的介绍了目前国外广泛采用的几种坑道钻,包括结构特点和技术参数,可供参考。
In recent years, foreign countries in the geological exploration work, the proportion of tunneling continue to increase. The number of underground tunnel rigs currently in operation in the United States is about 500, with an annual footage of about 1.5 million meters. Using underground tunneling methods (including both vertical and horizontal drilling) compared to surface drilling can not only save on drilling effort, but also allow drilling holes to be drilled in the necessary layers according to rock shape and characteristics Accurate geological data. This article gives a brief introduction of several widely used tunnel drills abroad, including structural features and technical parameters for reference.