Research on comprehensive evaluation of cavability of block caving based on MRMR
CAO Hui1，2，YU Shibo2，WANG He2，QIN Xiushan2，YUAN Ye2
(1. College of Civil and Environment Engineering，University of Science and Technology Beijing，Beijing 100083，China； 2. Beijing General Research Institute of Mining and Metallurgy，Beijing 100160，China)
Abstract：A reliable prediction of rock mass cavability is a critical factor in the successful caving of most orebodies. Aim to build a cavability assessment system of rock mass based on three-dimensional geological statistics method. Distance power inverse ratio method was used to digitize the three-dimensional geological information of drill. With the assistant of 3DMine，the three-dimensional digital model was built based on MRMR rock mass quality evaluation system. And then，the area distribution of cavability was evaluated from the aspects of macroscopic. Combining with engineering analogy and the predicted results of caving fragmentation，a cavability comprehensive evaluation of block caving is finished aiming at Don Javier mine. The results indicate that，the evaluation system was finally built. At last，the evaluation method was applied to Don Javier studies of the natural caving method. The result shows that，this evaluation system can satisfy the needs of rock mass cavability evaluation in block caving. The average value of MRMR is 56.4 from 1 800 m to 2 400 m of Don Javier Mine. And the cavability grade of orebody is defined as III medium. The initial undercutting area of production capacity reaches about 15 000 m2. The predicted caving fragmentation of Don Javier is from 0.06 m3 to 2.95 m3 and the results verify the evaluation of cavability.
曹 辉1，2，于世波2，王 贺2，秦秀山2，原 野2. 基于MRMR的自然崩落法可崩性综合评价研究[J]. 岩石力学与工程学报, 2016, 35(S2): 4148-4153.
CAO Hui1，2，YU Shibo2，WANG He2，QIN Xiushan2，YUAN Ye2. Research on comprehensive evaluation of cavability of block caving based on MRMR. , 2016, 35(S2): 4148-4153.
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2016, Vol. 35 
