坚硬煤层爆破致裂增注技术研究及应用
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摘要
为解决坚硬煤层注水难度大的问题,对煤层采取爆破致裂的技术,增加煤体裂隙,以平顶山矿区某煤矿为研究对象,验证了爆破致裂增注技术在坚硬煤层中的应用效果。结果表明:单孔爆破后裂隙扩展范围达到2~3 m,注水流量及总注水量比普通钻孔显著增大。双孔同时爆破时,由于应力波的相互叠加,使煤体应力重新分布,在两孔之间形成相互贯通的径向裂隙和环向裂隙,裂隙扩展范围可达6 m,爆破效果优于单孔爆破。
In order to solve the problem of hard coal seam blast cracking difficultly,the blast cracking technology was used to coal seam,and increased coal seam fissure,took a coal mine of Pingdingshan Mining Area as study subject,to verify application effect of the blasting crack augmented injection technology in hard coal seam. The result showed that the crack extended range reached 2 ~ 3m after the single- hole blasting,Water injection flow rate and total volume increased significantly than normal drilling. When double holes blasting at the same time,made the coal body stress redistribution,between two holes in the formation of mutual penetration of radial fracture and the ring into the fissure,The fracture extended range could be up to 6 m,the blasting effect is better than that of single hole blasting
In order to solve the problem of hard coal seam blast cracking difficultly,the blast cracking technology was used to coal seam,and increased coal seam fissure,took a coal mine of Pingdingshan Mining Area as study subject,to verify application effect of the blasting crack augmented injection technology in hard coal seam. The result showed that the crack extended range reached 2 ~ 3m after the single- hole blasting,Water injection flow rate and total volume increased significantly than normal drilling. When double holes blasting at the same time,made the coal body stress redistribution,between two holes in the formation of mutual penetration of radial fracture and the ring into the fissure,The fracture extended range could be up to 6 m,the blasting effect is better than that of single hole blasting
引文
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[8]李见波,陈学习,王新梅.煤层注水致工作面前方集中应力前移的机理分析[J].煤炭科学技术,2012,40(4):56-59.
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[10]吴金刚,郭军杰,李守振.特殊条件煤层注水防尘钻孔布置方式及效果研究[J].煤炭科学技术,2013,41(8):65-67.
[11]董跃文,胡国忠,许家林,秦伟,汪锋.超前支承压力对煤层注水速率影响试验研究[J].煤炭科学技术,2013,41(11):47-49.
[2]陈超.含水炮孔边坡预裂爆破应用研究[D].唐山:河北理工学院,2001.
[3]陈士海.深孔水压爆破装药结构与应用研究[J].煤炭学报,2000,25(S1):112-116.
[4]索永录.综放开采坚硬顶煤预先爆破弱化技术基础研究[D].西安:西安科技大学,2004.
[5]颜事龙,徐颖.水耦合装药爆破破岩机理的数值模拟研究[J].地下空间与工程学报,2005,1(6):921-924,943.
[6]徐炎明.不耦合装药爆破数值模拟[D].唐山:河北理工大学,2009.
[7]吕品,王志生,黄鹂.煤层注水时有效围压对煤体渗透性的影响[J].煤炭科学技术,2012,40(3):46-48.
[8]李见波,陈学习,王新梅.煤层注水致工作面前方集中应力前移的机理分析[J].煤炭科学技术,2012,40(4):56-59.
[9]宗琦,田立,汪海波.水介质不耦合装药爆破岩石破坏范围的研究和应用[J].爆破,2012,(2):42-46.
[10]吴金刚,郭军杰,李守振.特殊条件煤层注水防尘钻孔布置方式及效果研究[J].煤炭科学技术,2013,41(8):65-67.
[11]董跃文,胡国忠,许家林,秦伟,汪锋.超前支承压力对煤层注水速率影响试验研究[J].煤炭科学技术,2013,41(11):47-49.