眼前山铁矿矿岩崩落块度预测研究

Study on fragmentation prediction of caving rock mass in Yanqianshan iron mine

针对眼前山铁矿不同区域矿体可崩性差别大的特点,根据现场结构面调查结果,采用BCF崩落块度预测系统分别对眼前山东部矿体、中部矿体和西部矿体进行块度预测。预测结果表明东部矿体由于节理裂隙不发育,大块率非常高;中部矿体大块率较高,建议进行人工预裂后再进行自然崩落;西部矿体自然崩落矿岩块度很好,大块率低。

There is obvious difference in cavability of ore in different Yanqianshan iron mine regions.In this case,according to the survey results of the site structural plane,the BCF program is used to respectively predict the rock fragmentation of the eastern ore body,the central ore body and the western ore body.The results show that the eastern ore body maybe have a very high large fragmentation rate because of less joint fissures,and the central ore body has a slightly large fragmentation and is recommended to carry out artificial pre-split,the western ore body has fine block sizes and is suitably mined by block caving method.