摘要
巷道松动圈厚度是确定合理支护参数的重要依据。针对巷道顶板松动圈测试困难的问题,以金川三矿区1330m水平分段巷道为研究对象,首先采用超声波法对巷道帮部围岩进行松动圈测试;其次根据测试结果,采用黄金分割法对Hoek-Brown强度准则中的单轴抗压强度σc、H-B常数mi、地质强度指标GSI及岩体扰动参数D进行参数反演;然后结合三矿区实测地应力,采用Hoek-Brown强度准则及参数反演结果计算出巷道顶板围岩松动圈的厚度;最后对三矿区1330m水平不同类型围岩松动圈进行分类,根据分类结果提出不同的支护参数,并进行了现场支护试验,巷道支护效果良好。研究结果为巷道围岩松动圈的确定提供了新的方法和技术支撑。
The loose circle thickness in the roadway is an important basis for determining reasonable support parameters.Aiming at the difficulty of testing the loose circle of roadway roof,the 1330msublevel roadway in Jinchuan No.3mining area was taken as the research object.Firstly,the ultrasonic method was used to test the loose circle of roadway side surrounding rock.Secondly,according to the test results,the parameters of uniaxial compressive strengthσc,H-B constant mi,geological strength index GSI and rock mass disturbance parameter Din Hoek-Brown strength criterion were inverted by golden section method.Then,combined with the measured ground stress in No.3 mining area,the Hoek-Brown strength criterion and parameter inversion results were used to calculate the loose circle thickness of roadway roof surrounding rock.Finally,the loose circle thickness of different types of surrounding rocks in the 1330msublevel of the No.3mining area was classified,and different support parameters were proposed according to the classification results.The research results provide a new method and technical support for the determination of the loose circle of roadway surrounding rock.
作者
王康伟
王文杰
张鹏强
朱大铭
WANG Kangwei;WANG Wenjie;ZHANG Pengqiang;ZHU Daming(School of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization,Jinchang,Gansu 737100,China;Jinchuan Nickel and Cobalt Research and Design Institute Co.,Ltd.,Jinchang,Gansu 737100,China;No.3Mining Area,Jinchuan Group Co.,Ltd.,Jinchang,Gansu 737100,China)
出处
《矿业研究与开发》
CAS
北大核心
2024年第1期125-131,共7页
Mining Research and Development
基金
国家自然科学基金项目(51974206)
镍钴资源综合利用国家重点实验室开放基金项目(GZSYS-KY-2021-024).
关键词
巷道支护
围岩松动圈
超声波法
黄金分割法
正交试验
Roadway support
Loose circle of surrounding rock
Ultrasonic method
Golden section method
Orthogonal test
