定向长钻孔超前疏放顶板水技术在枣泉煤矿的应用

发布时间：2019-05-31 17:26

【摘要】：枣泉煤矿是我国西北侏罗系顶板裂隙水害典型代表矿井,主要受顶板直罗组砂岩含水层威胁,且存在大量烧变岩水,严重影响矿井正常生产。为了解决常规钻孔疏放顶板水时存在的施工工期和疏放周期长等问题,在11202工作面形成前,采用随钻测量定向钻进技术施工的定向长钻孔及分支孔对顶板直罗组砂岩含水层和烧变岩水进行了超前疏放,共完成4个定向长钻孔和5个分支孔,总进尺2589m,最大钻孔深度603m,单孔最大瞬时放水量64.8m~3/h,疏放周期三个月时共放水57440m~3,解除了顶板水害隐患,减少了工作面准备时间,确保了巷道掘进和工作面回采的安全。
[Abstract]:Zaoquan Coal Mine is a typical representative mine of Jurassic roof crack water damage in northwest China, which is mainly threatened by sandstone aquifer of roof Zhiluo formation, and there are a large number of burned rock water, which seriously affects the normal production of the mine. In order to solve the problems existing in the construction period and long drainage period when the roof water is dredged by conventional drilling, before the formation of 11202 working face, The directional long drilling and branch holes constructed by directional drilling technology are used to dredge the sandstone aquifer and burned rock water of roof straight Luo formation in advance, and a total of 4 directional long boreholes and 5 branch holes are completed, with a total advance of 2589m. The maximum drilling depth is 603m, the maximum instantaneous water discharge per hole is 64.8m 鈮，

本文编号：2489885