摘要
巷道作为矿山的主要工程结构,其稳定性一直影响矿山经济高效开发。随着矿井开采深度和强度的不断增加,开采强扰动、软弱破碎围岩等复杂地质条件导致巷道围岩变形破坏,大范围破坏时严重影响巷道通风及运输能力,制约着矿山的安全高效生产。因此开展破碎岩体巷道耦合支护技术研究,有效控制围岩变形,实现巷道服务周期内稳定显得尤为重要。针对安徽太平铁矿矿岩节理裂隙发育、强塑性等复杂工程条件,开展矿区各中段巷道变形监测,分析巷道变形破坏特征规律,采用FLAC^(3D)有限元软件模拟不同时空条件下巷道工程的相互影响关系,形成了以预应力锚杆、钢丝网、喷射混凝土、注浆、卸压槽等相结合的耦合支护方式。开展矿山巷道现场支护试验,巷道周边未出现膨胀、破裂等破坏现象,巷道返修率极低,巷道整体支护效果良好,为矿山安全经济开采提供了技术支撑。
Roadway as the main engineering structure of mines,its stability affects the economic and efficient development of the mine.With the continuous increase of mining depth and intensity,the complex geological conditions such as strong disturbance and weak broken surrounding rock will lead to deformation and destruction of surrounding rock,which will seriously affect the ventilation and transportation capacity of the roadway and restrict the safe and efficient production of the mine.Therefore,it is very important to carry out the research on the coupling support technology for the roadway with broken rock mass,so as to effectively control the deformation of the surrounding rock and to realize the roadway stability in the service period.In view of the complex engineering conditions such as the development of rock joints and fissures and strong plasticity in Anhui Taiping iron mine,the deformation monitoring of the roadways in each level of the mining area was carried out,and the characteristics of the deformation and failure of the roadway were analyzed.The FLAC3D finite element software was used to simulate the interaction of the roadways under different time and space conditions,forming the coupling support mode of prestressed anchor rod,steel wire mesh,shotcrete,grouting,pressure relief groove,etc.And then the field support test of the mine roadway was carried out,the surrounding of the roadway did not appear expansion,fracture and other damage phenomenon,the roadway repair rate was very low,and the overall support effect of the roadway was good,which provided technical support for the safe and economic mining of the mine.
作者
盛佳
李强
李向东
张海云
刘东锐
赵广阔
SHENG Jia;LI Qiang;LI Xiangdong;ZHANG Haiyun;LIU Dongrui;ZHAO Gunagkuo(Changsha Institute of Mining Research Co.,Ltd,Changsha,Hunan 410012,China;Hunan University of Science and Technology,College of Resources,Environment and Safety Engineering,Xiangtan,Hunan 411201,China;National Metal Mining Engineering Technology Research Center,Changsha,Hunan 410012,China;Anhui Taiping Mining Co.,Ltd,Suzhou,Anhui 234000,China)
出处
《矿业研究与开发》
CAS
北大核心
2020年第8期91-96,共6页
Mining Research and Development
基金
南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室开放基金项目(E21833).
关键词
强扰动
破碎岩体
强塑性
围岩变形
耦合支护
Strong disturbance
Broken rock mass
Strong plasticity
Surrounding rock deformation
Coupling support
