老城区建筑物下超高水材料充填开采技术应用

Backfill Mining Technology with Ultra High Water Content Material and Application Under Buildings in Old City Area

针对老城区地面建筑物密度大、建筑时间长、建筑结构安全等级低、开采后易变形破坏的特点,在进行超高水充填开采现场试验时,对工作面支架选型、回采充填工艺、超高水充填材料配比等关键工艺进行详细论证,并对工作面矿压观测进行分析,证明超高水充填材料配合比、充填工艺及相配套的综采设备选型适合矿井实际开采条件,且经济效益明显。

According to the high density, long building time, low grade building structure and after mining - easy failure features of the surface buildings in the old city area, during the site trial of the backfill mining with ultra high water content material, detail verifications were conducted on the powered support selection of the coal mining face, coal mining backfill technology, mixing ratio of the ultra high water content material and other key technology. An analysis was conducted on the mine strata pressure observation of the coal mining face. The results showed that the mixing ratio of the ultra high water content material, the backfill technology and the selection of the fully mechanized coal mining equipment were suitable to the actual mining conditions of the mine with remarkable economic benefit.