深部破碎厚矿床盘区机械化小分段充填法开采应用研究

Application on Panel Mechanized Small Sublevel Filling Method in Deep Broken Thick Deposit

针对锡铁山铅锌矿深部破碎厚矿床上向水平充填法开采中遇到的采场顶板冒落风险大、充填成本高、生产能力小等问题,提出了安全、高效的盘区机械化小分段充填法。采用FLAC3D软件对小分段采场结构参数及其分段平巷支护方案进行模拟对比分析,得出小分段充填法采场高度取10 m、宽度取8~10 m为宜,分段平巷采用树脂锚杆+钢筋网+喷砼支护方案可有效控制巷道变形。利用炉渣微粉+水泥熟料(配比为3∶1)替代水泥作胶凝材料可降低充填成本15%。现场试验表明,小分段充填法采场爆破参数排距为1.4 m、孔底距为1.6~2.0 m时矿石爆破效果最佳,试验盘区生产能力达到了1000 t/d,生产效率提高了100%。

Aiming at the problems of high risk of roof caving,high filling cost and small production capacity in the upward horizontal filling mining of deep broken thick deposits in Xitieshan Lead-Zinc Mine,a safe and efficient panel mechanized small sublevel filling method was proposed.The structural parameters of the small sublevel stope and the support scheme of the sublevel roadway was simulated and compared by FLAC3D.The results show that the height and the width of small sublevel stope are suggested to be 10mand 810m,and the resin bolt+steel mesh+shotcrete support scheme can effectively control the deformation of sublevel roadway.Using slag powder and cement clinker with the proportion of 3∶1to replace cement as cementitious material can reduce the filling cost by 15%.The field test shows that the ore blasting effect is the best when the blasting parameter row spacing is 1.4mand the hole bottom spacing is 1.62.0m,the production capacity of the tested panel reaches 1000t/d,and the production efficiency has been increased by 100%.