The results of experiment testify that the method not only realizes the normal ventilation and gas drainage in drivage roadway but also saves energy.
实验表明，该方法能较好地实现掘进巷道的正常通风和瓦斯排放，并达到节能效果。
Combining with a tunnel construction case, an ordinary method of ascertaining Optimum hole depths in small exploration tunnel 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。
The test results show that the better blasting effect and obvious technical and economic benefits in coal rock drivage can be acquired by means of the quasi-parallel cutting method.
实践表明，在煤矿岩巷掘进中使用准直眼掏槽方式，能够取得良好的爆破效果和显著的技术经济效益。
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