断层构造下承压水底板突水机理及注浆改造技术研究  

Study on Water Inrush Mechanism of Confined Water Floor and Grouting Reconstruction Technology under Fault Structure

作　　者：武大川 WU Dachuan(Jinhuagong Mine,Jinneng Holding Coal Group,Datong 037000,China)

机构地区：[1]晋能控股煤业集团晋华宫矿,山西大同037000

出　　处：《煤》2025年第5期90-93,108,共5页Coal

基　　金：山西省教育科学规划“十四五”规划课题资助项目(GH-220556);山西省基础研究计划项目(20210302124355)。

摘　　要：断层构造与地下承压水是威胁矿井水文地质安全的重要因素。针对山西某矿的实际地质条件,采用数值模拟方法探究了不同地质构造下的巷道底板塑性区扩展规律。基于悬臂梁模型,推导了底板挠度曲线方程,并引入描述底板破坏程度的线应变参数ε,以表征底板鼓起变形与完整岩层之间的变形关系,计算了理论方法与数值模拟方法结果的误差。采用瞬变电磁法探测了底板注浆改造前后的防治水效果。结果表明:与承压水的作用相比,断层结构是导致巷道的塑性区大幅度扩展的主要因素,底板鼓起量是无断层情况下的2.6倍。理论计算表明,承压水作用对巷道底板变形的影响较小,底板岩层的最大挠度为644 mm,破坏区的线应变参数ε为67,与模拟结果的误差为3.5%.通过瞬变电磁探测技术验证了底板注浆改造技术的可靠性。Fault structure and underground confined water are important factors threatening mine hydrogeological safety.According to the actual geological conditions of a mine in Shanxi Province,the expansion law of the plastic zone of roadway floor under different geological structures is investigated by numerical simulation method.Based on the cantilever beam model,the floor deflection curve equation is derived,and the linear strain parameterε,which describes the damage degree of the floor,is introduced to characterize the deformation relationship between the bulging deformation of the floor and the intact rock layer.Transient electromagnetic method was used to detect the effect of water control before and after grouting reconstruction.The results show that,compared with the effect of confined water,the fault structure is the main factor leading to the large expansion of the plastic zone of the roadway,and the floor bulking volume is 2.6 times of that without fault.The theoretical calculation shows that the effect of confined water on the deformation of roadway floor is small,the maximum deflection of floor rock is 644 mm,and the linear strainεin the failure zone is 67,which is the error of 3.5%with the simulation result.The reliability of floor grouting reconstruction technology is verified by transient electromagnetic detection technology.

关 键 词：承压水 断层构造 水害防治 底板注浆 

分 类 号：TD745[矿业工程—矿井通风与安全]