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矿区为多金属的硫化矿薄矿床,矿脉厚度为0.1～0.5米,倾角为70～85°,围岩为扁豆灰岩(f=10—12)及灰质页岩(f=6—10)。矿石具有氧化性,不论矿石或围岩,都非常容易结块。当使用普通留矿法开采时,矿石损失大,并影响其他作业进行,特别是对安全生产的威胁更大,有时甚至被迫停止作业。为了克服上述缺点,曾使用过横撑支柱开采及分层留矿法,作业的安全性大大增加,但矿石结块现象仍很严重,加以分层留矿法的结构及回采工艺过程目前尚
The mine area is a polymetallic sulphide ore deposit with thickness of 0.1-0.5 m and dip angle of 70-85 °. The surrounding rock is lentil limestone (f = 10-12) and gray shale (f = 6-10). Ore is oxidative, regardless of ore or rock, are very easy to agglomerate. When mining using the conventional retention method, the loss of ore is large and affects other operations. In particular, there is a greater threat to work safety and sometimes it is even forced to stop working. In order to overcome the above shortcomings, we have used cross-strut mining and stratified mining method, the safety of the operation greatly increased, but the ore agglomeration is still very serious, to be stratified structure of the retention method and the recovery process is still