摘要
介绍了在高硬度高倾角岩性施钻铅垂度要求很高的倒锤钻的经验及钻孔纤偏检查和安装倒锤线的方法。
This paper introduced the experience of the inverted plumb line boring with high vertical requirement at high angle of tilt and adamant rock, and the bore hole surveying straightening and installing of the plumb line.
出处
《陕西水力发电》
1998年第1期25-28,共4页
Journal of Shaanxi Water Power
