夏甸金矿崩落空区隔离矿柱开采研究
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摘要
夏甸金矿深部矿体形态特殊,对中部矿体采用无底柱分段崩落法,两侧采用上向水平分层充填法开采,为保证安全生产,在崩落空区两侧留设10m左右的隔离矿柱。为了对隔离矿柱进行安全回收,采用了FLAC3D数值模拟的方法,从留设矿柱尺寸以及顶板支护等方面的多个方案进行了优化选择。研究表明:留设宽度为2.5m的条形矿柱及采用网度为2m的长锚索支护为最优方案,可以实现隔离矿柱的安全回收。
The deep ore body of the Xiadian gold mine was special in shape,which adopted the sublevel caving without sill pillar in the middle of the ore body,and the upper horizontal layer filling method on both sides.The isolation pillar of about 10 mwas left on both sides of the caving space to ensure the safe production.In order to recover the isolated pillar safely,the FLAC3 Dnumerical simulation method was adopted to optimize the selection of several schemes,such as the size of the pillar and the roof support.The research showed that the setting of the strip pillar with the width of 2.5 mand the long anchor cable support with the mesh of 2 m was the best schemes,which could realize the safe recovery of pillar.
The deep ore body of the Xiadian gold mine was special in shape,which adopted the sublevel caving without sill pillar in the middle of the ore body,and the upper horizontal layer filling method on both sides.The isolation pillar of about 10 mwas left on both sides of the caving space to ensure the safe production.In order to recover the isolated pillar safely,the FLAC3 Dnumerical simulation method was adopted to optimize the selection of several schemes,such as the size of the pillar and the roof support.The research showed that the setting of the strip pillar with the width of 2.5 mand the long anchor cable support with the mesh of 2 m was the best schemes,which could realize the safe recovery of pillar.
引文
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[11]宫宇新,何满潮,汪政红,等.岩石破坏声发射时频分析算法与瞬时频率前兆研究[J].岩石力学与工程学报,2013,32(04):787-799.
[2]王青,任凤玉,等.采矿学[M].北京:冶金工业出版社,2012.
[3]宋卫东,梅林芳,谭玉叶,等.大间距无底柱分段崩落法采场地压变化规律研究[J].金属矿山,2008,38(08):13-16,39.
[4]任赛,程光华.某铀矿山分区开采隔离矿柱留设尺寸研究[J].铀矿冶,2017,36(04):261-266,272.
[5]汪令辉.冬瓜山铜矿隔离矿柱开采的地压危害分析[J].长江科学院院报,2014,31(09):88-92.
[6]汪洪涛,隋少飞.冬瓜山铜矿隔离矿柱开采方法及稳定性分析[J].金属矿山,2013(03):39-41.
[7]徐恒,王贻明,吴爱祥,等.基于综合指数法的深部开采隔离矿柱失稳危险性评价[J].有色金属工程,2018,8(01):98-104.
[8]杨悦增,何少博,王金波,等.夏甸金矿崩落法隐伏采空区稳定性分析[J].有色金属(矿山部分),2017,69(04):26-29.
[9]杨悦增,许国良,何少博,等.夏甸金矿上向水平分层充填法结构参数优化的数值模拟[J].金属矿山,2017(07):42-46.
[10]史艳辉.夏甸金矿地压活动规律与控制方法研究[D].沈阳:东北大学,2005.
[11]宫宇新,何满潮,汪政红,等.岩石破坏声发射时频分析算法与瞬时频率前兆研究[J].岩石力学与工程学报,2013,32(04):787-799.