陕西煤炭2025，Vol.44Issue(10)：21-24,4.DOI:10.20120/j.cnki.issn.1671-749x.2025.1004
煤矿顶板水力压裂裂纹扩展特性实验研究
Experimental study on crack propagation characteristics of hydraulic fracturing in coal mine roof
摘要
Abstract
As the depth of coal mining increases,the control of the overlying rock stratum becomes crucial.To investigate the effects of different confining pressures and borehole angles on hydraulic fracturing cracks,this paper conducted a simulation experiment of hydraulic fracturing crack propagation using similar materials.The experimental results show that hydraulic fracturing cracks mainly propagate along the direction perpendicular to the minimum principal stress,and the deflection an-gle of the crack is significantly affected by the borehole angle and the difference in principal stress.The larger the borehole angle or the larger the difference in principal stress,the easier and more obvious the deflection,and the faster the crack propagation speed in the case of a larger borehole angle or a smaller difference in principal stress.The experiment reveals the characteristics of hydraulic fracturing crack extension under different conditions,providing theoretical support for the op-timization of parameters in the application of hydraulic fracturing for pressure relief in hard roofs.关键词
坚硬顶板/水力压裂/主应力差/钻孔倾角/裂缝扩展Key words
hard roof/hydraulic fracturing/principal stress difference/borehole angle/crack propagation分类
矿业与冶金引用本文复制引用
冯伟,胡振华..煤矿顶板水力压裂裂纹扩展特性实验研究[J].陕西煤炭,2025,44(10):21-24,4.基金项目
国家自然科学基金资助项目(52074276) （52074276）
国家重点研发计划资助项目资助(2022YFC3004702) （2022YFC3004702）
