单一低透气性煤层水耦合深孔预裂爆破增透技术研究与应用  

Single low permeability coal seam water coupling deep hole pre-splitting blasting

作　　者：韩希伟 韩言宁 杨聿强 伊嘉辉 Han Xiwei;Han Yanning;Yang Yuqiang;Yi Jiahui(The First Exploration Team of Shandong Provincial Bureau of Coal Geology,Zaozhuang 277100,China;Shandong Provincial Gas Prevention and Control Engineering Center,Zaozhuang 277100,China;Shanghai University of Applied Sciences,Shanghai 200000,China)

机构地区：[1]山东省煤田地质局第一勘探队,山东枣庄277100 [2]山东省瓦斯防治工程中心,山东枣庄277100 [3]上海应用技术大学,上海200000

出　　处：《煤炭与化工》2024年第6期103-106,111,共5页Coal and Chemical Industry

摘　　要：为解决单一低透气性煤层瓦斯透气性差、抽采困难、传统爆破方式增透效果不佳等问题,提出采用水耦合装药替代空气不耦合的方式。通过ANSYS/LS-DYNA软件建立水耦合装药深孔预裂爆破模型,分析水耦合装药方式爆破后应力波传递和裂隙的延伸效果,得出了水耦合装药方式能够更好的传递爆破产生的应力波。在河南省新郑煤电有限责任公司14207下底抽巷开展水耦合深孔预裂爆破试验,爆破致裂后,煤层瓦斯浓度和标态瓦斯纯流量都有提高,与数值模拟结果相互验证,表明该方法可以较好的增加煤层的透气性,改善单一低透气性煤层瓦斯抽采困难的问题。In order to solve the problems of poor gas permeability,difficult extraction and poor antireflection effect of traditional blasting methods in single low permeability coal seam,a method of replacing air decoupling with water coupling charge is proposed.The deep hole pre-splitting blasting model of water coupling charge was established by ANSYS/LS-DYNA software,and the effect of stress wave transmission and crack extension after blasting was analyzed.It was concluded that the water coupling charge method can better transmit the stress wave generated by blasting.The water-coupled deep-hole pre-splitting blasting test was carried out in the 14207 lower bottom drainage roadway of Xinzheng Coal and Electricity Co.,Ltd.in Henan Province.After the blasting cracking,the coal seam gas concentration and the standard gas pure flow were greatly improved.The mutual verification with the numerical simulation results shows that this method can better increase the permeability of the coal seam and improve the difficulty of gas extraction in a single low-permeability coal seam.

关 键 词：低透气性煤层 瓦斯抽采 预裂爆破 数值模拟 水介质 

分 类 号：TD712[矿业工程—矿井通风与安全]