巷道围岩破坏及滞后突水机理研究  

Mechanism study on roadway surrounding rock failure and lag water inrush

作　　者：马强 Ma Qiang(Shanxi Tiandi Wangpo Coal Industry Co.,Ltd.,Jincheng 048000,China)

机构地区：[1]山西天地王坡煤业有限公司,山西晋城048000

出　　处：《能源与环保》2024年第7期275-281,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：山西省科技攻关计划资助项目(MQ2020-10);山西天地王坡煤业有限公司项目(CG202105103)。

摘　　要：我国华北型煤矿开采受底板承压水威胁严重,巷道掘进之后承压水滞后突水是矿井常见的生产安全事故之一。为了减少巷道滞后突水事故,实现安全高效地开采受底板承压水威胁的煤层,采用力学分析理论通过建立数学分析模型和数值模拟模型,运用工程地质与水文地质学相关理论推导与分析。研究结果表明,巷道掘进完成后底角是破坏范围最大的地方;应力失衡是造成围岩破坏的主要原因;应力变化引起能量失衡是造成底板承压水导升的主要原因;水对岩石的软化作用是造成滞后突水的关键因素。提出了可以通过强化巷道支护和注浆改造遭受承压水破坏的隔水层底部结构的方法,防治巷道掘进过程中的滞后突水问题,为防治底板存在高承压含水层,并且具有滞后突水危险性的矿井指明了新方向。The exploitation of Northern China type coal mine is under great threat of the floor confined water,one of the common production safety accidents in mines is the lag water inrush of confined water after roadway excavation.To decrease the lag water inrush accidents in roadways and achieve safe and efficient mining of coal seams threatened by confined water from the floor,mechanical analysis theory was used to establish mathematical analysis models and numerical simulation models.Relevant theories of engineering geology and hydrogeology were applied to derive and analyze.The research results indicate that:after the completion of roadway excavation,the bottom foot was the area with the largest range of damage;stress unbalance was the main cause of underground rock failure;the change of stress could lead to energy out-of-balance resulting in the floor confined water been risen;the mollification effect of water on rocks was a key factor causing lag water inrush.A method was proposed to strengthen roadway supporting and grouting to transform the bottom structure of the waterproof layer that has been damaged by confined water during roadway excavation,in order to prevent the problem of lag water inrush during roadway excavation.This has pointed out a new direction for preventing mines with high pressurized aquifers on the floor and the risk of lag water inrush.

关 键 词：巷道 滞后突水 岩石软化 加强支护 注浆 

分 类 号：TD745.2[矿业工程—矿井通风与安全]