摘要
针对大采深、断层构造与采空区侧向应力耦合作用下掘进工作面冲击地压防治的难题,采用理论分析、现场实测与工程反演相结合的方法,系统探究掘进工作面矿压显现规律,提出“钻-爆结合+反向掘进+定点补强支护”的冲击地压综合防治措施,实现了耦合高应力集中区的安全掘进。研究结果表明:基于“载荷三带”理论估算,掘进工作面最大静载荷为45.67 MPa,采空区侧向支承压力峰值距采空区60 m;微震监测数据显示,微震事件主要集中在顶底板30 m范围内,其中煤层顶板30 m范围内微震事件能量占比40%、频次占比38%,该层位范围主要为煤层顶板23.6 m处13.4 m厚的中砂岩,可为以关键层为导向的断顶施工参数优化提供依据;微震数据反演结果表明,在距3下101采空区55~80 m处存在应力积聚,与载荷三带理论计算的60 m峰值位置基本吻合。
To address the challenge of rockburst prevention in development headings under the coupled effects of large mining depth,fault structures,and lateral stress from goafs,we employed a combined approach of theoretical analysis,field measurement,and engineering back-analysis.We systematically investigated the mine pressure behavior in development headings and proposed comprehensive rockburst prevention measures of“drilling-blasting+reverse heading advancement+targeted reinforcement support,”achieving safe excavation in areas of coupled high stress concentration.The research results show that,based on estimates from the“three-zone loading”theory,the maximum static load on the development heading is 45.67 MPa,and the peak lateral abutment pressure from the goaf is located 60 m from the goaf.Microseismic monitoring data indicate that microseismic events mainly occur within 30 m of the roof and floor.Microseismic events within 30 m from the roof account for 40%of the total energy and 38%of the frequency.This horizon primarily corresponds to a 13.4 m thick medium sandstone located 23.6 m above the coal seam roof,providing a basis for optimizing roof fracturing parameters guided by key strata theory.The back-analysis results of microseismic data show stress accumulation at 55~80 m from the 3 lower 101 goaf,which is generally consistent with the 60 m peak location calculated by the three-zone loading theory.
作者
孔贺
谭花文
谭国龙
田国庆
张泽辉
KONG He;TAN Huawen;TAN Guolong;TIAN Guoqing;ZHANG Zehui(General Technology Group Engineering Design Co.,Ltd.,Jinan 250031,China;Shandong Shuanghe Coal Mine Co.,Ltd.,Jining 272155,China)
出处
《煤炭工程》
北大核心
2026年第1期101-107,共7页
Coal Engineering
关键词
载荷三带
冲击地压
掘进工作面
耦合叠加
微震监测
钻-爆结合
千米深井
three-zone loading
rockburst
development heading
coupled superposition
microseismic monitoring
drilling-blasting combination
kilometer-deep mine
