坚硬厚煤层可控冲击波增透技术应用  

Application of controllable shock wave for permeability enhancement in hard thick coal seam

作　　者：苏士龙 SU Shi-long(Huajin Coking Coal Co.,Ltd.,Lvliang 033000,China)

机构地区：[1]华晋焦煤有限责任公司,山西吕梁033000

出　　处：《煤炭工程》2020年第9期71-75,共5页Coal Engineering

基　　金：国家重点研发项目(2017YFC0804206-002);中央高校基本科研业务费资助项目(3142019005);“十三五”国家科技重大专项(2016ZX05067005-001)。

摘　　要：为了解决坚硬厚煤层瓦斯治理中煤储层增透技术优化的难题,介绍了一种可控冲击波煤储层增透技术,并以吉宁煤矿为工程背景,分析了冲击波增透后的钻孔抽采效果,结果表明:可控冲击波通过迫使煤储层内部结构发生破坏,促进原生裂隙间相互沟通形成渗透裂隙网,显著提高煤层透气性,使冲击钻孔有效半径增大至17m;单孔抽采量为普通钻孔的8.9倍,瓦斯抽采达标时间缩短了64%左右,并且随着冲击波单点冲击次数增大,增透效果更加显著。In order to optimize the coal reservoir permeability enhancement technology for gas treatment in hard and thick coal seam,a controllable shock wave coal reservoir permeability enhancement technology is introduced,and the borehole extraction effect is analyzed after shock wave permeability enhancement in Jining Coal Mine.The results show that,the controllable shock wave can promote the communication between primary fissures,and create permeable fissures network by destroying the internal structure of coal reservoirs to enhance the permeability of coal seams,which expends the effective radius of impact drilling to 17m.Compared with ordinary drilling,this technology increases the single-hole extraction to 8.9 times,reduces the gas extraction time by 64%,saves economic investment.With the increase of single-point mode of shock wave,the permeability enhancing effect is better.

关 键 词：煤储层 可控冲击波 增透技术 瓦斯抽采 有效抽采半径 

分 类 号：TD712.[矿业工程—矿井通风与安全]