由长办勘测总队负责的“六五”期间国家重点攻关项目,复杂地基勘探与工程地质研究的分项目——大口径全断面钻进技术,于十月十一日在太原市通过鉴定。这项重大科研成果,钻孔工艺先进,在国防工程建设,桥基勘测、煤田开发,地下水利用等勘探中将发挥重 The long-term full-face drilling technology, a national key research project during the “6th Five-Year Plan” period under the leadership of the Changhang Survey Corps, and a sub-project of complex foundation exploration and engineering geology research, passed the appraisal in Taiyuan on October 11. This major scientific research achievement, advanced drilling technology, will play a heavy role in the national defense engineering construction, bridge foundation survey, coalfield development, groundwater exploration and other exploration