煤矿安全2025，Vol.56Issue(6)：165-175,11.DOI:10.13347/j.cnki.mkaq.20240103
巷道水力压裂切顶应力转移机理及工程实践
Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway
摘要
Abstract
Aiming at the problem that the hard roof in the goaf is difficult to collapse,which causes severe mine pressure in the road-way,the transport roadway in the eighth mining area of Jingfang Coal Mine is taken as the engineering background,through theoret-ical analysis,numerical simulation and field measurement,the stress transfer mechanism of the roadway is studied by using hydraul-ic fracturing technology.The results show that the optimal height of pre-splitting and roof cutting from the 3-8072 coal roadway to the coal pillar side is 25 m,and the optimal angle is 30°.After roof cutting,the high stress near the transport roadway in the mining area is obviously reduced,and the vertical stress on the coal pillar side is reduced from 33.79 MPa to 17.7 MPa,with a decrease of 47.6%;after hydraulic fracturing,the arch foot of the transport roadway in the mining area is cut off,as a result,the arch foot moves to the right and remains stable for a long time due to the large structure of the macroscopic stress shell.Through this technology,the hanging roof structure of hard roof can be changed,and the transmission of high stress to roadway can be blocked,thus the roadway is effectively protected.关键词
巷道稳定性/水力压裂/切顶卸压/坚硬顶板/顶板弱化/数值模拟Key words
roadway stability/hydraulic fracturing/roof cutting and pressure relief/hard roof/roof weakening/numerical simulation分类
矿业与冶金引用本文复制引用
龚固,刘增辉,张若飞,张君宝,吴子扬,马凡泰..巷道水力压裂切顶应力转移机理及工程实践[J].煤矿安全,2025,56(6):165-175,11.基金项目
国家自然科学基金资助项目(51774008,51974007,51874002) （51774008,51974007,51874002）
安徽省高校科研资助项目(2022AH052928) （2022AH052928）
