坑内心钻在琅琊山铜矿深部开拓中的应用

Application of Tunnel Core-Drilling in the Plutonic Development of the Langyashan Copper Mine

介绍坑内心钻在矿山前期生产勘探中的传统用法及存在问题 。

This article introduces the traditional use and the existential problem of tunnel core-drilling in the prospecting of early stage, and puts forward the improvement in its plutonic development.