罗嗣海, 刘剑, 王观石, 胡世丽, 桂勇. 2018: 基于统计分析离子型稀土矿体力学参数的测点布置. 工程地质学报, 26(2): 422-430. DOI: 10.13544/j.cnki.jeg.2017-016
    引用本文: 罗嗣海, 刘剑, 王观石, 胡世丽, 桂勇. 2018: 基于统计分析离子型稀土矿体力学参数的测点布置. 工程地质学报, 26(2): 422-430. DOI: 10.13544/j.cnki.jeg.2017-016
    LUO Sihai, LIU Jian, WANG Guanshi, HU Shili, GUI Yong. 2018: STATISTICAL ANALYSIS FOR LOCATION ARRANGMENT TO MEASURE MECHANICAL PARAMETERS OF ORE BODY IN ION-ABSORBED RARE EARTH MINING. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 422-430. DOI: 10.13544/j.cnki.jeg.2017-016
    Citation: LUO Sihai, LIU Jian, WANG Guanshi, HU Shili, GUI Yong. 2018: STATISTICAL ANALYSIS FOR LOCATION ARRANGMENT TO MEASURE MECHANICAL PARAMETERS OF ORE BODY IN ION-ABSORBED RARE EARTH MINING. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 422-430. DOI: 10.13544/j.cnki.jeg.2017-016

    基于统计分析离子型稀土矿体力学参数的测点布置

    STATISTICAL ANALYSIS FOR LOCATION ARRANGMENT TO MEASURE MECHANICAL PARAMETERS OF ORE BODY IN ION-ABSORBED RARE EARTH MINING

    • 摘要: 基于统计分析结果合理布置测点,测试土体力学参数具有测试结果准确和经济快捷等优点。在赣南某稀土矿山非等间距布置6个测点,共计18个测试孔,通过旁压试验和钻孔剪切试验测试了离子型稀土矿体的旁压模量、变形模量、压缩模量、黏聚力和内摩擦角等力学参数,运用经典统计学方法和地质学统计方法分析矿体力学参数的空间变异性。研究结果表明:试验矿块内矿体的黏聚力和旁压模量属于强变异,黏聚力的变异系数为0.48,旁压模量的变异系数为0.36;内摩擦角属于弱变异性,其变异系数为0.067;假设由18个测试孔的测试数据计算得到各力学参数为真值,若15%为工程可接受的误差,运用经典统计学方法分析和地质统计学方法分析结果表明,对于试验矿块,在45 m范围内均匀布置5个测点,测试结果可有效估计矿块内黏聚力和旁压模量的平均值和变异系数。

       

      Abstract: Statistical analysis method is used to arrange locations of measuring points reasonably. The test results of soil mechanic parameters are both accurately and economical quick. In a rare earth mine southern Jiangxi province, 6 measuring points were arranged and each measuring point had 3 test holes. Through pressuremeter test and borehole shear test, the mechanical values of pressuremeter modulus, deformation modulus, compression modulus, cohesion and internal friction angle of ion-absorbed rare earth ore body were obtained. And the spatial variability of the mechanic parameters in ore body was analyzed by classical statistics method and geology statistics method. It is found that the cohesion and the pressuremeter modulus of ore body in test block are strong variation. The variation coefficient of the cohesion is 0.48 and the variation coefficient of the pressuremeter modulus is 0.36. The internal friction angle is weak variation and its variation coefficient is 0.067. It was assumed that the test values of mechanic parameters are truth value and the acceptable error of engineering is 15%. Through classical statistics method and geology statistics method, it is shown that, in this test block, the test result can efficiently estimate the mean and the variation coefficients of ore body's cohesion and pressuremeter modulus by arrangement 5 measuring points uniformly in 45m scope.

       

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