面向自然崩落法矿山的初始块度预测软件研发及应用

Development and application of primary fragmentation prediction software for block caving mine

矿石块度是采用自然崩落法开采需要考虑的重要因素。以自然崩落法初始块度预测基本原理为基础,在DIMINE软件平台上采用C++语言开发了初始块度预测软件系统。该系统综合考虑了节理系统的空间几何参数和地应力的作用,支持从块体体积、等效尺寸和块体形状等不同角度对初始块度结果进行分析。以国外某斑岩型铜矿为例,采用该软件对矿体按勘探线分区进行了初始块度预测,并将结果与国外常用的BCF软件的预测结果进行了对比分析。研究结果表明,矿体勘探线间初始块度的大块率在40.8%~74.8%之间,等效尺寸在1.65~2.63 m之间变化。软件预测的结果与BCF软件预测的结果比较接近,变化趋势基本一致,预测结果为自然崩落法矿山后续的开采设计提供了参考依据。

Ore fragmentation is an important factor to consider when using block caving method.Based on the basic principle of primary fragmentation prediction using block caving method,a primary fragmentation prediction software system is developed using C++language on the DIMINE software platform.The system comprehensively considers the influence of spatial geometric parameters of the joint system and the in-situ stress,supporting the analysis of primary fragmentation prediction results from different perspectives such as block volume,equivalent size,and block shape.Taking a porphyry copper deposit abroad as an example,the software is used to predict the primary fragmentation of the ore body according to the exploration line zoning,and the results are compared and analyzed with the prediction results of commonly used BCF software at abroad.The results show that the oversize rate of primary fragmentation between the exploration lines of the ore body ranges from 40.8%to 74.8%,and the equivalent size varies between 1.65 m and 2.63 m.The predicted results of the software are relatively close to that of BCF software,and the trend of change is basically consistent.The predicted results provide a reference basis for the subsequent mining design of block caving mines.