我矿有不少矿段属缓倾斜中厚矿体。矿体厚度8～12米,倾角在15～35度之间。过去一直沿用普通房柱法进行回采。由于我矿仅有浅眼凿岩设备,对于这类矿体需要多次作业循环,才能暴露顶板。每次放炮后的浮矿处理,既费时费工,劳动强度又大。特别是随着回采后退,顶板暴露面积不断扩大,悬顶又很高,对于顶板松动情况很难检查发现;即使发现了,也不容易处理,以至落石伤人,严重威胁在悬顶下作业的人员安全;有时甚至被迫中途放弃回采,造成了资源的损失。 I mine a lot of mining section is gently inclined medium thick ore body. Ore thickness of 8 to 12 meters, angle of 15 to 35 degrees. In the past, the common house method has been used for mining. Due to the fact that mine has only shallow-hole rock drilling equipment, it takes several cycles for such ore bodies to expose the roof. After each shot of the floating ore handling, both time-consuming labor, labor intensity and large. Especially with the back of the mining, roof exposed area continues to expand, the roof is very high, for the roof loose condition is difficult to check the discovery; even if found, it is not easy to handle, even a rockfall, a serious threat to work under the roof Personnel safety; sometimes even forced to abandon the mining, resulting in the loss of resources.