煤矿开采
煤礦開採
매광개채
COAL MINING TECHNOLOGY
2014年
1期
95-97
,共3页
“三软”%难抽煤层%水力压裂%增透
“三軟”%難抽煤層%水力壓裂%增透
“삼연”%난추매층%수력압렬%증투
“three-soft”%coal-seam with low permeability%hydro-fracture%adding permeability
“三软”低透气性煤层抽放钻孔施工过后,钻孔抽放周期短、抽放浓度衰减快、瓦斯抽放量低一直是困扰煤与瓦斯突出矿井的一个难题,为解决这一难题。大平矿在21121底板抽放巷采取了水力压裂增透卸压技术,通过几个月以来的观测,对水力压裂影响区域及未采取水力压裂措施区域抽放浓度进行对比分析,采取水力压裂措施后,能够有效增加钻孔的透气性,使钻孔抽放浓度衰减时间增长,瓦斯抽放量得到大幅提高,并且在水力压裂过后,施工其余钻孔期间,钻孔的产尘量明显降低。
“三軟”低透氣性煤層抽放鑽孔施工過後,鑽孔抽放週期短、抽放濃度衰減快、瓦斯抽放量低一直是睏擾煤與瓦斯突齣礦井的一箇難題,為解決這一難題。大平礦在21121底闆抽放巷採取瞭水力壓裂增透卸壓技術,通過幾箇月以來的觀測,對水力壓裂影響區域及未採取水力壓裂措施區域抽放濃度進行對比分析,採取水力壓裂措施後,能夠有效增加鑽孔的透氣性,使鑽孔抽放濃度衰減時間增長,瓦斯抽放量得到大幅提高,併且在水力壓裂過後,施工其餘鑽孔期間,鑽孔的產塵量明顯降低。
“삼연”저투기성매층추방찬공시공과후,찬공추방주기단、추방농도쇠감쾌、와사추방량저일직시곤우매여와사돌출광정적일개난제,위해결저일난제。대평광재21121저판추방항채취료수력압렬증투사압기술,통과궤개월이래적관측,대수력압렬영향구역급미채취수력압렬조시구역추방농도진행대비분석,채취수력압렬조시후,능구유효증가찬공적투기성,사찬공추방농도쇠감시간증장,와사추방량득도대폭제고,병차재수력압렬과후,시공기여찬공기간,찬공적산진량명현강저。
In order to solve the problem of short drainage period , fast attenuation of drainage concentration , low methane drainage a-mount after drill-hole construction , hydro-fracture was applied in 21121 floor drainage roadway of Daping Colliery.Several months ob-servation and comparison with data from areas without hydro-fracture showed that hydro-fracture could add permeability in drill-holes, made drainage concentration attenuation time increase and methane drainage amount increase largely .After hydro-fracture, dust quantity of drill-hole reduced obviously in other drill-hole construction.