某大型钼矿的矿体可崩性预测

分析了某大型低品位钼矿的地质构造情况,收集了用于岩体稳定性评价的主要指标参数,在此基础上推估了矿体的RMR值,对比分析了多种自然崩落法岩体可崩性评价方法,并利用Laubscher崩落图法绘制了矿山的可崩性预测图,得到了矿山初始崩落和持续崩落时的拉底水力半径,分析了不同拉底形状的优缺点并确定了最终拉底形态参数,利用数值模拟手段对预测拉底参数下的矿石崩落情况进行了计算分析,结果表明,预测的拉底空间参数下能达到崩落预期,该矿具有自然崩落法开采工艺的可行性。

Prediction research of caving difficulty in a molybdenum mine

The geological structure condition of a low grade big Molybdenum Mine is analyzed,and the main parameters that are used for stability evaluation of rock is collected.On this basis,the rock’s RMR value is estimated. Comparative analysis of many orebody caving difficulty evaluation methods in domestic natural caving is made,and the undercutting hydraulic radius of initial caving and sustainable caving in the mine has been obtained by means of Laubscher’s caving chart.The advantages and disadvantages in different undercutting forms are analyzed,and final undercutting form’ s Shape Parameters is determined.According to the forecasting undercutting parameters,using FLAC^3D sofe for analysis,the result shows that the Molybdenum Mine has the feasible caving difficulty,and the mine is suitable to be mined by natural caving method.