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| Application of hydraulic fracturing antireflection technique in coal seam gas extraction |
| Zuo Wenbing1, Zhang bin2, LI Xiaoshen3, Chen Yujia4 |
| 1. Hebei Province Administration of Coal Mine Safty, Shijiazhuang 050051, China; 2. Jizhong Energy Corporation Ltd., Xingtai 054000, China; 3. Dongpang Mine of Jizhong Energy Corporation Ltd., Xingtai 054299, China; 4. School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China; |
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Abstract Effective gas drainage guaranteed safety production of high outburst mine, and permeability coefficient of seam was an important parameter for gas drainage effect. Seam hydraulic fracturing antireflection test was implemented combining with site conditions of 21112 working face in Dongpang Mine to satisfy need of increasing seam permeability. Based on experiments, basic parameters of hydraulic fracturing antireflection technique which was suitable for Dongpang Mine 2# seam was determined, borehole volume and costs were reduced, concentration and scalar of borehole seam methane in current seam together with drainage effect were significantly improved.
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