钻孔泄水能起到一定的泄水降压作用，但易受堵塞影响，泄水能力有限。
To release water by boring can reduce the water pressure, but the water release ability is limited because of the boring blockage.
姚桥煤矿通过对二叠系太原组四灰含水层被堵塞钻孔和裂隙发育不畅钻孔利用盐酸洗井，一次洗通，取得了良好的效果。
At Yaoqiao coal mine, once and successful shaft washing using hydrochloric acid is made in the drillhole aquifer stuffed by the Permian system Taiyuan group NO. 4 lime, good result has been obtained.
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