论文部分内容阅读
西北地质局耶恩勘探大队于1962-1963年布置了多井巷钻进勘探井的试验工作。在方法上这些工作与过去所进行的工作有原则上的差别,因为在这种场合下多井巷钻进的目的
In 1962-1963, the Yeon Brigade of the Northwest Bureau of Geology set up a pilot project to drill wells into exploration wells. The methods are fundamentally different from what was done in the past because the purpose of drilling a multi-well lane in such a situation