【摘要】：棗泉煤礦是我國西北侏羅系頂板裂隙水害典型代表礦井,主要受頂板直羅組砂巖含水層威脅,且存在大量燒變巖水,嚴(yán)重影響礦井正常生產(chǎn)。為了解決常規(guī)鉆孔疏放頂板水時(shí)存在的施工工期和疏放周期長等問題,在11202工作面形成前,采用隨鉆測量定向鉆進(jìn)技術(shù)施工的定向長鉆孔及分支孔對(duì)頂板直羅組砂巖含水層和燒變巖水進(jìn)行了超前疏放,共完成4個(gè)定向長鉆孔和5個(gè)分支孔,總進(jìn)尺2589m,最大鉆孔深度603m,單孔最大瞬時(shí)放水量64.8m~3/h,疏放周期三個(gè)月時(shí)共放水57440m~3,解除了頂板水害隱患,減少了工作面準(zhǔn)備時(shí)間,確保了巷道掘進(jìn)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，

本文編號(hào)：2489885