Combining with a tunnel construction case, an ordinary method of ascertaining Optimum hole depths in small explorationtunnel drivage is discussed.
结合一坑道施工实例，论述了小型探矿坑道确定最优炮眼深度的一般方法。
2
The result of tunnel construction show that the exploration achievement is reliable.
隧道施工结果表明，勘探成果的可信度较高。
3
The paper introduces method, technique and application effect of high density resistivity method in exploration laws of recharge, runoff, drainage of tunnel water burst.