Hydraulic fracturing permeability-increasing extraction method for coal seam roof of coal roadway driving face

• Main Authors: ZHANG YUMING, ZHANG ZHAOYI, MA ZHENGHENG, CHAO JIANWEI, WU WENBIN, FU JUNHUI, TAO TAO, PAN XUESONG, WANG RAN, LI RIFU, YAO ZHUANGZHUANG, SUN DONGLING, QIN FENGYUAN, LI LIANGWEI, SUN HAITAO, ZHAO XUSHENG, NING ERQIANG, MA SHUYIN, SUN PENG
• Format: Patent
• Language: Chinese; English
• Published: 03.02.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; MINING OR QUARRYING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention relates to a coal roadway driving face coal seam roof hydraulic fracturing permeation-increasing extraction method, and belongs to the technical field of coal mine underground hydraulic fracturing permeation-increasing. According to the coal roadway driving face coal seam roof hydraulic fracturing permeation-increasing extraction method, according to parameters such as the coal seam thickness, the coal seam firmness coefficient, the roof firmness coefficient and the monthly footage of planned driving of the coal roadway, roof directional long drill holes deviating from the coal roadway by a certain distance in drill site construction are alternately arranged, and hydraulic fracturing is carried out; and the fracture is expanded to the coal seam by pressing through the roof, the coal seam permeability in the coal roadway area is improved, and the extraction range of the directional long drill hole is widened. According to the method, it is guaranteed that the fracturing range can cover the planne