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A New Method for Recovery of Coal in Abandoned Sill Pillars

机译:储存煤炭桩柱煤炭的一种新方法

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This paper describes a new approach for recovery of sill coal pillars which has been formed during exploitation of very steep coal layers with a kind of cut and fill method named Gazangui, in Babnizu Coal Mines at Kerman Province in south east of Iran. Mine is gassy one with high potential of spontaneous combustion and it is very difficult to mechanize mining operations because of geological conditions. During exploitation of coal from cut and fill stope, some pillars polygonal in shape have been abandoned for protection of main level drifts that each contain approximately 1200- 6000 tonne of coal. Using this new method more than 50% of abandoned coal has been recovered from the above mentioned pillars and the activity is in progress now. Dilution of coal because of rock material caving from side walls is a very considerable problem. Recovery has been done by driving one stone gazangue driven in the footwall that separate in two branches inside the pillar (east-west) and coal is excavating with permissible explosive.
机译:本文介绍了在伊朗克尔曼省克尔曼省的巴布苏煤矿,在伊朗东南部的临时煤层中剥削了煤层煤柱恢复的新方法。矿井是具有高潜力的气体燃烧,并且由于地质条件,机械化采矿业务非常困难。在从切割和填充的煤开采期间,一些柱子形状的柱子被抛弃以保护各自含有大约1200-6000吨煤的主要水平漂移。使用这种新方法,从上述支柱中恢复了超过50%的废弃煤,现在正在进行中。由于岩石材料从侧壁塌陷,煤炭稀释是一个非常相当大的问题。通过在脚踏墙上驾驶一块石头船员来完成恢复,该石头Gazangue在柱子(东西)内部的两个分支中分开,煤炭正在挖掘漏洞。

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