轻质吸能类膏体充填采矿法在深部急倾斜薄矿体开采中的应用

Application of lightweight energy-absorbing paste filling mining method in deep steeply inclined thin ore body mining

针对夹皮沟金矿采用硐室内取料干式充填采矿法开采存在的生产能力低、工人劳动强度大、采场地压显现频繁等问题,根据夹皮沟金矿深部急倾斜薄矿体的赋存特点及开采技术条件,开展了轻质吸能类膏体充填采矿法试验研究,取消了原有的采场内取料硐室,简化了回采工序,降低了回采作业循环,同时轻质吸能类膏体具有一定的强度,可以较好地支撑采场上下盘围岩,确保采场的稳定,提高采场作业安全。现场应用表明:采用该工艺,平均采场生产能力为20.66 t/d,提高了47.25%;采矿损失率由12%降低到3.5%,矿石贫化率由8.6%降低到4.2%。效果较好,可供同类型矿山参考借鉴。

Addressing issues such as low production capacity,high labor intensity,and frequent ground pressure manifestations in the chamber-based dry filling mining method at Jiapigou Gold Mine,this study conducted experimental research on the lightweight energy-absorbing paste filling mining method.Given the characteristics of the deep steeply inclined thin ore bodies and mining technical conditions at Jiapigou Gold Mine,the original chamber for material extraction within the stope was eliminated,simplifying the extraction process and reducing the operation cycle time.The lightweight energy-absorbing paste possesses sufficient strength to effectively support the hanging wall and footwall of the stope,ensuring stope stability and enhancing operational safety.Field application results indicate that using this method,average stope production capacity reached 20.66 t/d,an increase of 47.25%.The mining loss rate decreased from 12%to 3.5%,and the ore dilution rate dropped from 8.6%to 4.2%.The results are promising and provide a valuable reference for similar mines.