中文摘要：

板庙子金矿针对矿体内溶洞区发育的富水厚大复杂难采矿体的实际特点,借助深孔凿岩台车、装药台车、遥控铲运机、湿喷台车等先进的大型无轨机械化设备,试验成功了大直径深孔崩矿嗣后充填采矿法。提出的平底式底部结构施工简单,采切工程量小;采用装药台车实施散装ANFO炸药机械化装药、高精度数字雷管微差爆破,使单次爆破最大总装药量达到10 t,爆破振幅控制在0.3 cm/s以内,并实现了30 m高、4 m2小断面切割天井一次爆破成井;根据不同的溶洞赋存位置和体积,通过优化爆破回采顺序、修复炮孔、“隔山打牛”爆破等多种方式,使单采场生产能力达到2 000 t/d,采矿回收率为94%,贫化率小于7%。

英文摘要：

In view of the actual condition of water-rich thick complex ore-body developed in cavity region in Banmiaozi gold ore, and with the aid of advanced large trackless mechanized equipment including deep hole drill rig, charging trolley, remote scrapers, wet spray trolley and others, the mining method of large diameter long hole drilling with subsequent backfill was successfully carried out. The flat floor structure proposed is simple in construction with less mining and stoping engineering quantities. Mechanized charging up with bulk Anfo by charging trolley and millisecond blasting with high-precision digital deto- nators make the maximum explosive payload reach 10 t at single blasting and blasting amplitude within 0.3 cm/s. A well can be formed at a time by small section of cutting at 4m2 and 30 m in height. According to different locations and volumes of cavi- ties, the production capacity of per stope reaches 2 000 t/d through stoping sequence optimization, holes reparation, and holes stripping and drilling from adjacent stopes for blasting, and achieves the mining recovery rate of 94% and the dilution rate less than 7%.