松软煤层井下水力压裂增透技术及应用  

Technology of Underground Permeability Improvement of Soft Coal-seam with Hydrofracture and Its Application

作　　者：雷毅[1] 武文宾[2] 陈久福[3] 

机构地区：[1]煤炭科学研究总院,北京100013 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [3]重庆松藻煤电有限责任公司,重庆401402

出　　处：《煤矿开采》2015年第1期105-107,4,共4页Coal Mining Technology

基　　金：国家科技重大专项(2011ZX05041-003)

摘　　要：针对松软煤层弹性模量、抗压强度和抗拉强度较低,泊松比、孔隙压缩系数较高,易发生塑性变形等特点,将松软煤层井下水力压裂划分为煤体压密、裂缝起裂与裂缝扩展3个阶段,提出压裂工艺参数选择的参考原则,并在松软煤层典型矿区开展水力压裂现场试验。对压裂效果进行考察分析表明,在合理选择压裂工艺参数的前提下,水力压裂对于松软煤层增透作用明显。For soft coal-seam,elastic module,compression strength and tension strength are low,Poisson ratio,pore compressibility are large and plastic deformation is easy to occur. Underground hydrofracture of soft coal-seam was divided into coal compaction,fissure initiation and extension phrases. Selection principle of hydrofracture parameters was put forward. On-the-spot test was made in typical mining area with soft coal-seam. Effect analysis showed that permeability improvement action on soft coal-seam was obvious on the premise of rationally selecting hydrofracture parameters.

关 键 词：松软煤层 水力压裂 增透技术 

分 类 号：TD712.55[矿业工程—矿井通风与安全]