煤矿安全2024，Vol.55Issue(12)：10-21,12.DOI:10.13347/j.cnki.mkaq.20240926
坚硬厚顶板岩层定向长钻孔水力压裂防冲技术及应用
Technology and application of long directional drilling hydraulic fracturing for preventing rock burst in thick and hard roof
摘要
Abstract
With the extensive development of coal resources in Shaanxi and Mongolia,rock burst phenomenon has gradually be-come an important problem affecting the safety production of coal mines.Aiming at the problem of uniform pressure relief of hard thick roof of rock burst coal seam,taking 23301 working face of a mine as the engineering background,ABAQUS numerical simula-tion software is used to simulate the hydraulic fracturing process of directional long drilling.The numerical simulation results show that the fractures mainly expand in the direction of perforation,and there is a dense fracture network around the fractured layer,and a single main fracture tends to form with the increase of the expansion radius,which proves that the fracturing operation can effect-ively achieve the purpose of roof pressure relief.The target strata were determined according to the theory of key strata and a high-low layout scheme was designed for the roof.The fracturing effect was discussed by focusing on the results of holes 2-1.The applic-ation results show that the fractures are mainly horizontal and the fracture network is complex.During fracturing,the injection pres-sure curve fluctuates zigzag in the fracture expansion zone and the expansion is fully and continuously.Fracturing operation signific-antly reduces the roadway deformation during mining,realizes the safe and efficient mining of the working face.关键词
冲击地压/厚硬顶板/数值模拟/水力压裂/卸压效果Key words
rock burst/hard and thick roof/numerical simulation/hydraulic fracturing/pressure relief effect分类
矿业与冶金引用本文复制引用
赵善坤,王炳钦,苏振国,李少刚,史月,桑辛成,刘安,韩伟歌..坚硬厚顶板岩层定向长钻孔水力压裂防冲技术及应用[J].煤矿安全,2024,55(12):10-21,12.基金项目
天地科技创新创业资金专项资助项目(2023-TD-ZD001-004,2024-TD-ZD010-01) （2023-TD-ZD001-004,2024-TD-ZD010-01）
