顺层钻孔水力压裂增渗技术在单一低透气性煤层的应用  

Application of Hydraulic Fracturing Technology in Single Low Permeability Coal Seam

作　　者：薛志鹏 XUE Zhi-peng(Safety Training Center of Shanxi Coal Mine,Taiyuan030012,China)

机构地区：[1]山西煤矿安全培训中心,山西太原030012

出　　处：《煤》2022年第9期1-4,9,共5页Coal

基　　金：国家自然科学基金(51874122);河南省科技攻关项目(222102320050);河南省高校基本科研业务费专项项目(NSFRF210426)。

摘　　要：常规技术与参数进行瓦斯抽采难以满足要求,故采用水冲击压裂煤层在单一低透气性煤层改善低透气性,利用冲击力二次破坏煤体使原生裂隙扩展贯通,从而提高煤体透气性。寺家庄矿15301工作面采用顺层钻孔水力压裂增渗强化抽采技术,结果表明,压裂区相较非压裂区平均瓦斯浓度与瓦斯纯量有明显提高,瓦斯浓度提高6倍。Conventional technology and parameters for gas extraction are hard to meet the requirements.So the hydraulic impact fracturing is used to improve low permeability in a single low permeability coal seam,which secondary damage the coal body to make the original fracture expand and penetrate to improve the permeability of coal.Sijiazhuang Coal Mine 15301 working face adopted the enhanced drainage technology of hydraulic fracturing and seepage enhancement by bedding drilling.The results show that the average gas concentration and gas purity in the fracturing area are significantly improved compared with those in the non-fracturing area.The gas concentration is increased by 6 times.

关 键 词：水力压裂 增透技术 顺层钻孔 单一煤层 低透气性 抽采纯量 

分 类 号：TD712[矿业工程—矿井通风与安全]