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江西九江铜硫矿,为一矿石松散的急倾斜厚大高硫矿床。主矿体走向长180~200米,倾角70°~80°,平均厚度45米,最厚70米。矿体上盘为高岭土和含铜高岭土,下盘为风化较严重的石英砂岩,顶部为碎裂石英岩。矿石松软破碎且忌水,f=1~3,平均含铜2.04%,含硫量高达30~35%,极易氧化自燃。矿山从1974年开始,曾用无底柱分段崩落法和分层崩落法开采,终因采场地压无法控制,加上多次自燃发火、矿石损失严重而失败。针对存在问题,经过不断探索,于1980年使用了块石作填料的下向分层充填法,通过近几年生产实践获得了成功,使采场地压得到了控制,保证了回采的顺利进行,并对开采过程中的地压显现特征有了进—步认识。
Jiujiang copper and sulfur mine in Jiangxi Province, a loose ore sharp thick thick Sulfur deposit. The main ore body to the long 180 ~ 200 meters, dip 70 ° ~ 80 °, the average thickness of 45 meters, the thickest 70 meters. The upper body of the ore body is kaolin and copper-bearing kaolin. The lower plate is quartzite sandstone with more weathered weathering and fractured quartzite rock at the top. Ore soft broken and avoid water, f = 1 ~ 3, with an average of 2.04% copper, sulfur content as high as 30 ~ 35%, easily oxidized spontaneous combustion. Since 1974, the mine has been mining with subsidence-free subsidence caving method and subsidence caving method and eventually failed due to uncontrollable ground pressure and multiple spontaneous combustion and serious loss of ore. In response to the existing problems, after continuous exploration, in 1980, the use of block stone filling down the stratified filling method, through the success of production practice in recent years, so that stope ground pressure has been controlled to ensure the smooth progress of mining, And the pressure of mining in the process of mining characteristics have been further understanding.