急倾斜破碎中厚矿体诱导冒落法进路位置实验研究

针对急倾斜破碎中厚矿体,依据沿脉进路诱导冒落法开采方案,通过物理模拟实验,采用回收率、贫化率数量指标和经济指标综合分析方法,研究了沿脉回采进路位置与矿体倾角的关系.实验结果表明:采用上、下分段沿脉进路同时处于最佳位置时的布置方式,回收指标较好;矿体倾角不同,进路至下盘距离与矿体厚度的比值对回收率、贫化率的影响程度不同;回采进路所处的最佳位置随矿体倾角的减小逐渐向矿体下盘移动;当矿体倾角小于75°时,不适合应用该方案.结合实验结果与开采条件,确定了最佳回采进路位置,为同类矿山提供借鉴.

Experimental Study on Mining Drift Position of Induced Caving Method for Steeply Inclined Fractured Orebody with Medium Thickness

Focusing on the mining of steeply inclined fractured orebody with medium thickness， based on the induced caving method using the following-vein drift， the relationship between the following-vein mining drift position and the dip angle of orebody was studied through physical simulation experiment combined with comprehensive analysis with recovery and dilution ratios as the quantitative and economic indices. The results are as follows: the recovery index is better when the following-vein drifts of both the upper and lower section are in the best position; the ratio of the distance from drift to footwall to the thickness of orebody has a different impact on the recovery and dilution ratios at the different dip angle of orebody; the best mining drift position gradually moves towards the footwall of orebody with the decrease of the dip angle of orebody; the scheme proposed is not applicable when the dip angle of orebody is less than 75°. According to the experimental results and mining conditions， the optimum mining drift position is determined as reference for similar mines.