水力压裂增透工艺及瓦斯综合治理效果考察研究  

Investigation and research on hydraulic fracturing and permeability enhancement technology and comprehensive gas control effect

作　　者：马淑胤 Ma Shuyin(China Coal Technology&Engineering Group Chongqing Research Institute,Chongqing 400037,China;State Key Laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [3]安徽理工大学安全科学与工程学院,安徽淮南232001

出　　处：《能源与环保》2023年第3期134-139,143,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金重点项目(51934007);天地科技股份有限公司科技创新创业资金专项项目(2022-2-TD-ZD008);山东省重点研发项目(2019SDZY02)。

摘　　要：针对某矿703综采工作面瓦斯涌出问题,在工作面回采前先对工作面进行顺层孔致裂卸压增透,再施工工作面顺层抽采钻孔治理本煤层瓦斯涌出。结果表明,未压裂区域煤层原始瓦斯含量为6.68 m^(3)/t,压裂区域煤层瓦斯含量约为3.59 m^(3)/t;未压裂区域煤层原始瓦斯压力为0.4 MPa,压裂区域煤层瓦斯压力约为0.14 MPa;未压裂区域煤层透气性系数为0.0073 m^(2)/(MPa^(2)·d^(-1)),压裂区域煤层透气性系数为0.0242 m^(2)/(MPa^(2)·d^(-1)),与未压裂区域相比,压裂区域的瓦斯抽采浓度和抽采纯量都有大幅度的提高;703工作面采取措施前,回采工作面相对瓦斯涌出量16.6 m^(3)/t,绝对瓦斯涌出量84.01 m^(3)/min;而703工作面采用综合瓦斯治理措施情况下,回采工作面相对瓦斯涌出量13.29 m^(3)/t,绝对瓦斯涌出量60.28 m^(3)/min,且上隅角瓦斯浓度回采期间基本下降到1%以下。Aiming at the problem of gas emission in the 703 fully-mechanized mining face of a certain mine,before the working face is mined,the working face was subjected to bedding fracturing,pressure relief,and permeability enhancement,and then the working face was drilled along bedding to control the gas emission in the coal seam.The results showed that the original gas content of the coal seam in the unfractured area was 6.68 m^(3)/t,and the gas content of the coal seam in the fracturing area was about 3.59 m^(3)/t.The original gas pressure of the coal seam in the unfractured area was 0.4 MPa,and the coal seam gas pressure in the fracturing area was about 0.14 MPa.The permeability coefficient of the coal seam in the unfractured area was 0.0073 m^(2)/(MPa^(2)·d^(-1)),and the permeability coefficient of the coal seam in the fracturing area was 0.0242 m^(2)/(MPa^(2)·d^(-1)).Compared with the unfractured area,the gas drainage concentration and drainage scalar in the fracturing area were greatly improved.Before taking measures on the 703 working face,the relative gas emission from the mining face was 16.6 m^(3)/t,and the absolute gas emission was 84.01 m^(3)/min.When the 703 working face adopts comprehensive gas control measures,the relative gas emission of the mining face was 13.29 m^(3)/t,the absolute gas emission was 60.28 m^(3)/min,and the gas concentration in the upper corner basically decreased to below 1%during the mining period.

关 键 词：水力压裂 瓦斯治理 卸压增透 效果考察 

分 类 号：TD712[矿业工程—矿井通风与安全]