断层影响下千米深井巷道围岩破坏机制及控制  

Failure Mechanism and Control of Surrounding Rock of Kilometer-deep Roadway Under Fault Influence

作　　者：梅成成 朱永建 王平[2,3] 任恒[1] 李鹏 MEI Chengcheng;ZHU Yongjian;WANG Ping;REN Heng;LI Peng(School of Resources&Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southerm Goal Mines,HunanUniversity of ScienceandTechnology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]湖南科技大学南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201 [3]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2023年第1期1-8,共8页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助面上项目(51774130,51804114);南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室科研启动项目资助(969-E51770);湖南省研究生创新项目资助(CX20200985);湖南科技大学重点实验室开放基金资助项目(E22014)。

摘　　要：为解决深部巷道断层附近围岩变形量大的问题,以山东鑫汇金矿-1 070 m水平石门巷道为研究背景,现场调查发现巷道存在冒顶和片帮等隐患,且巷道断面尺寸在原有支护下2个月后由3.6 m×3.1 m缩减到3.1 m×2.5 m.采取修正后的Hoek-Brown准则引入Hoek-Brown常数(m_(1))、岩体地质强度指标(GSI)和扰动因子(D)3个参数,计算后发现临界失稳半径与Hoek-Brown常数、地质强度指标和岩石单轴抗压强度呈负相关,与围岩应力和扰动因子呈正相关.在此基础上,通过数值模拟对比了原方案和“超前管棚注浆支护+锚梁网喷+长锚索+钢支架”联合支护方案的效果,结果表明:巷道顶底板变形量最大分别减小了400和300 mm,底板变形量两帮变形量最大减小了200 mm,检验了支护方案的有效性.方案实施后,现场监测表明,巷道顶底板及两帮的围岩变形量维持在250 mm以内,巷道围岩状况满足工程的需要.In order to solve the problem of large deformation of surrounding rock near deep roadway faults,taking Shimen roadway-1070 m horizontal in Xinhui Gold Mine,Shandong Province as the research background,the field investigation finds that the roadway has hidden dangers such as roof caving and flanging,and the roadway section size is reduced from 3.6 mx3.1 m to 3.1 mx2.5 m after 2 months under the original support.Three parameters,Hoek-Brown constant(m_(1)),geological strength index(GSI)and disturbance factor(D)are introduced by adopting the modified Hoek-Brown criterion.After calculation,it is found that the critical failure radius is negatively correlated with Hoek-Brown constant,geological strength index and rock uniaxial compressive strength.It is positively correlated with surrounding rock stress and disturbance factor.On this basis,through the numerical simulation compared with the original plan and“advance grouting pipe roof support+spray anchor beam web+long anchor cable,steel support”the effect of the combination supporting scheme,the results show that the roof and floor of roadway deformation is reduced to 400 and 300 mm respectively,biggest floor deformation of the deformation of two largest is reduced to 200 mm,testing the effectiveness of the supporting schemes.After the implementation of the scheme,the site monitoring shows that the deformation of the roof,floor and two sides of the roadway is maintained within 250 mm,and the surrounding rock condition of the roadway meets the demands of the project.

关 键 词：断层 深部巷道 数值模拟 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]