›› 2010, Vol. 31 ›› Issue (6): 1907-1912.

• 岩土工程研究 • 上一篇    下一篇

基于区域化变量及RMR评价体系的金川III矿区矿岩质量评价

贾明涛,王李管   

  1. 中南大学 资源与安全工程学院,长沙 410083
  • 收稿日期:2008-11-08 出版日期:2010-06-10 发布日期:2010-06-25
  • 作者简介:贾明涛,男,1973年生,博士,副教授,主要从事数字矿山、采矿与岩土工程可视化和系统工程方面的研究。
  • 基金资助:

    金川集团攻关项目(No. 金科矿2004-01D)。

Evaluation of rockmass quality based on regionalization variable optimal estimation theory and RMR system in Jinchuan mine No.3

JIA Ming-tao,WANG Li-guan   

  1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China
  • Received:2008-11-08 Online:2010-06-10 Published:2010-06-25

摘要:

岩体质量的全面评价是自然崩落法矿山可行性研究和初步设计的重要前提和依据。RMR体系是通常采用的综合性评价方法,以钻孔或坑道的局部RMR评价值来表征整个区域的岩体质量具有片面性。因此,以金川III矿区1554水平以上的岩体质量调查数据为样品,首先对其空间结构性及变异性进行了分析,得出调查区RMR参数指标具有区域化变量特征的结论;其次,建立了评价范围内各类工程和岩性区段的三维表面模型,并对该模型用长方体单元进行了离散;然后,借助区域化变量最优无偏估值方法,对各离散单元块的RMR参数指标进行推估,建立了反映全局变化的矿岩质量三维可视化RMR评价模型;最后以RMR评价模型为基础,根据Laubscher崩落图对矿岩初始和持续崩落的水力半径进行了计算。结果表明:III矿区的RMR均值为39.8,矿岩可崩性属较好到很好。预测金川III矿区平均持续崩落水力半径为20.4 m。

关键词: 金川III矿区, 岩体质量评价, RMR评价体系, 区域化变量, 可崩性, 崩落半径

Abstract:

The comprehensive evaluation of rockmass quality was an important prerequisite and basis for the feasibility study and preliminary design of a block caving mining mine. The most usually method was the RMR system, the local RMR value of the borehole and tunnel was used to represent the qualities of all region traditionally. Based on the investigation data of Jinchuan Mine No. 3 with an elevation above 1554 m, the spatial structural quality and variability of the parameters of the RMR system were analyzed firstly. Secondly, the 3D surface model of different engineerings and lithological regions were constructed; furthermore, they were filled by numerous discrete cuboids unit. Thirdly, by using the best unbiased evaluation method for the regionalization variables, the RMR parameters of each cuboids unit were estimated, and resulted in a 3D RMR evaluation model which reflects the global variation of rockmass qualities of the Jinchuan Mine No. 3. Finally, based on the resulted model, the sustained and occurring hydraulic radius of Jinchuan Mine No. 3 above 1554 m was calculated by Laubscher’s caving chart. The result showed that the mean RMR value of the evaluation region was 39.8, the cavability ranks were good to very good; and the estimated mean sustained hydraulic radius of Jinchuan Mine No. 3 is 20.4m.

Key words: Jinchuan Mine No.3, rockmass quality evaluation, regionalization variable, cavability, cavability hydraulic radius

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