摘要
针对金山店矿深部开采地下巷道松软粉矿岩无法现场取出完整试样的特点,探索采用回弹仪对松软矿岩体的抗压强度直接进行测试。以金山店矿东西采区-425 m、-455 m水平掘进巷道粉矿和矽卡岩破碎带为研究对象,采用回弹仪进行了回弹值测试;基于国家标准和行业标准中回弹仪检测混凝土抗压强度的测强公式,依据金山店矿矿岩工程地质特性,进行经验公式优选,构建回弹值和抗压强度的关联样本;采用数理统计方法,回归得到金山店矿松软粉矿岩的两个修正测强经验公式。结果表明,东西采区-425 m水平粉矿回弹值均值为19.35,抗压强度平均值为6.58 MPa,西采区-455 m水平软岩破碎带回弹平均值为21.92,抗压强度平均值为14.994 MPa,该结果与金山店矿松软粉矿岩巷道基于巷道收敛值反演出的结果基本一致。研究结果为地下工程中不良工程地质条件下无法现场取试样进行室内岩石抗压强度测试的情况提出了一种可行的解决方法。
In view of the characteristics that the soft powder ore rock in the deep mining underground roadway of Jinshandian Mine can not take out the complete sample on site,the direct test of compressive strength of loose soft rock mass by rebound instrument was explored.Taking the powder ore and skarn fracture zone of-425 m and-455 m horizontal tunneling roadway in the east-west mining area of Jinshandian Mine as the research object,the rebound value was tested by rebound instrument.Based on the strength formula of concrete compressive strength detected by rebound instrument in national standards and industry standards,according to the engineering geological characteristics of Jinshandian Mine,the empirical formula was optimized,and the correlation sample of rebound value and compressive strength was constructed.Using mathematical statistics method,two modified empirical formulas for strength measurement of soft powder ore rock in Jinshandian Mine were obtained by regression.The results show that the average rebound value of-425 m horizontal powder ore rock in the east-west mining area is 19.35,and the average compressive strength is 6.58 MPa.The average rebound value of-455 m horizontal soft rock fracture zone in the west mining area is 21.92,and the average compressive strength is 14.994 MPa.The results are basically consistent with the results of the inversion of the soft powder rock roadway based on the convergence value of the roadway in Jinshandian Mine.The research results provide a feasible solution for the situation that was impossible to take samples on site for indoor rock compressive stength test under poor engineering geological conditions in underground engineering.
作者
石啸天
陈清运
朱汉明
邵春悦
刘珂君
袁帅
王朝旭
SHI Xiaotian;CHEN Qingyun;ZHU Hanming;SHAO Chunyue;LIU Kejun;YUAN shuai;WANG Chaoxu(School of Resources&.Safety Engineering,Wuhan Institute of Technology,Wuhan,Hubei 430074,China;WISCO Resources Group Jinshandian Mining Co.,Ltd.,Daye,Hubei 435116,China)
出处
《矿业研究与开发》
北大核心
2025年第10期138-143,共6页
Mining Research and Development
基金
国家自然科学基金项目(52174086)
武汉工程大学研究生教育创新基金项目(CX2023172)。
关键词
深部开采
松软粉矿岩
回弹值
单轴抗压强度
经验公式
Deep mining
Soft powder ore rock
Rebound value
Uniaxial compressive strength
Empirical formula
