煤矿塌陷区岩体变形稳定性研究  

Study on deformation stability of rock mass in coal mine subsidence area

作　　者：李高阳 Li Gaoyang(School of Civil Engineering,Yulin University,Yulin 719000,China)

机构地区：[1]榆林学院建筑工程学院,陕西榆林719000

出　　处：《能源与环保》2023年第4期268-274,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：陕西省教育厅2022年度一般专项科研计划项目(22JK0631);榆林市科技局项目(CXY-2020-003)。

摘　　要：为了确保煤矿开采的安全,对煤矿塌陷区岩体变形稳定性进行研究。以具体的煤矿塌陷区为研究对象,分析了实验设备,主要包含压力机、自动采集系统与反力装置,并提出模拟开挖步骤与破坏机理分析过程。稳定性研究结果表明,当采空区长度超过28 m时,纵向位移增加,地面垂直位移随深度增大而减小;上采范围为200~270 m时,对岩体变形的控制难度加大,极易出现不稳定现象;顶部荷载在0.33 MPa之前,顶部测点、底测点及左测点的总位移无明显变化,而0.33 MPa以上时,总位移差异较大。In order to ensure the safety of coal mining,it is necessary to study the deformation stability of rock mass in coal mine subsidence area.Taking the specific coal mine subsidence area as the research object,this paper analyzes the experimental equipment,mainly including press,automatic acquisition system and reaction device,and puts forward the simulation excavation steps and failure mechanism analysis process.The results of stability study show that when the length of goaf exceeds 28 m,the longitudinal displacement increases and the ground vertical displacement decreases with the increase of depth.When the upper mining range is 200~270 m,it is more difficult to control the rock mass deformation,and instability is very easy to occur.Before the top load reaches 0.33 MPa,there is no significant change in the total displacement of the top,bottom,and left measuring points,but when it is above 0.33 MPa,the total displacement difference is large.

关 键 词：煤矿塌陷区 岩体变形 稳定性 力学参数 破坏机理 

分 类 号：TU458[建筑科学—岩土工程]