Method for designing directional hydraulic fracturing pressure relief parameters of coal mine underground working face roof

• Main Authors: ZHANG YUMING, MA ZHENGHENG, CHAO JIANWEI, WU WENBIN, TAO TAO, FU JUNHUI, PAN XUESONG, WANG RAN, LI RIFU, YAO ZHUANGZHUANG, QIN FENGYUAN, LI LIANGWEI, NING ERQIANG, SUN PENG
• Format: Patent
• Language: Chinese; English
• Published: 29.11.2022
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; MINING OR QUARRYING

The invention belongs to the technical field of coal mining. According to the method, parameters such as coal seam burial depth, coal seam thickness, roadway height, working face strike length, roof firmness coefficient and drilling diameter are considered; the method for calculating parameters such as the drilling spacing, the drilling length, the drilling inclination angle, the drilling number, the pilot seam depth and the hole sealing length of the directional hydraulic fracturing pressure relief of the top plate is designed, the calculation process is simple, convenient and rapid, consideration is comprehensive, and the implementation effect of directional hydraulic fracturing pressure relief of the top plate can be improved. 本发明属于煤矿开采技术领域。涉及一种煤矿井下工作面顶板定向水力压裂卸压参数设计方法，考虑了煤层埋深、煤层厚度、巷道高度、工作面走向长度、顶板坚固性系数、钻孔直径等参数，设计了顶板定向水力压裂卸压钻孔间距、钻孔长度、钻孔倾角、钻孔数量、先导缝深度、封孔长度等参数的计算方法，计算过程简便快捷，考虑全面，有助于提升顶板定向水力压裂卸压的实施效果。