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我矿是一座中型石灰石矿，年产量60万t，采用Mth爿m治力位白月＿四肢／尝z体状俚相因＠天开采，到两手大量而求进入炮孔．造成炮孔内改水、放炮输需要将孔内和水排出，否则将直接影响爆破效果．如何将孔内积水排出成为多年来生产技术难问。YQ－150治扎钻机，＃孔直径150mm、钻
I mine is a medium-sized limestone mine, the annual output of 600,000 t, the use of Mth 爿 m governance force Baiyue _ limbs / taste z body slaughter due to @ mining days, both hands and seeking access to a large number of holes. Resulting in the blast hole to change water, blasting need to drain the hole and water, otherwise it will directly affect the blasting effect. How to drain the hole into the production technology over the years difficult to ask. YQ-150 Zha Zhuan rig # hole diameter 150mm, drilling