DOI: 10.11799/ce201709019
Engineering test research of hydraulic fracturing technology in Huangling No. 2 Mine
ZHANG Jian
ZHENG Kai-ge
WU Sheng-li
TIAN Chang-hu
Abstract：In order to improve gas drainage efficiency in Huangling No. 2 Mine, in which coal, petroleum and coal bed methane coexists, and enhance the mining and driving speed, we carried out hydraulic fracturing test in 11# drilling site of 205 mining face transportation roadway of Huangling No. 2 Coal Mine using hydraulic fracturing facility with remote control and video monitoring, on the basis of thorough geological analysis and occurrence regularity of coal, petroleum and gas. The results showed that, the oil-type gas enrichment area in coal floor was connected with the coal seam through fissures, after the construction of the 2 hydraulic fracturing boreholes, the fracturing influence radius was over 20m. The highest water injection pressure reached 26. 8MPa and 25. 2MPa respectively which were over the theoretical fracture pressure 23MPa. According to monitoring data in 2 months, the average gas drainage concentration increased 19 times and the average methane amount increased 22 times, compared with the non-fractured data.
Keywords：hydraulic fracturingwater injection pressureconnected fissurespermeability improvementeffective radius of influence
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 72-74,79 )