In order to enhance the efficiency of excavating coal, Beishan coalmine attempts to adopt millisecond delay direct initiation at working face.
百善煤矿为提高采煤效率，尝试在采煤工作面实行毫秒延期反向起爆。
This paper systematically described the test and application of millisecond delay detonation technique in blast-Winning face of very thin seal in Xiehe Coal Mine.
系统介绍了毫秒爆破技术在协合煤矿极薄煤层炮采工作面的试验及应用情况。
Millisecond delay technology of high step and deep hole is the first application in China, it offers a realistic method for high step exploitation of middle and small scale limestone mine.
高台段深孔孔内微差爆破技术在我国的首次应用，为中小型石灰石矿山高台段开采提供了切实可行的方法。
Millisecond delay technology of high step and deep hole is the first application in China, it offers a realistic method for high step exploitation of middle and small scale limestone mine.
高台段深孔孔内微差爆破技术在我国的首次应用，为中小型石灰石矿山高台段开采提供了切实可行的方法。
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