红泥坡铜矿地下开采对地表尾矿库影响的预测
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摘要
为了确保地表尾矿库的稳定,采用有限差分程序FLAC3D模拟地下矿体开采对地表尾矿库的影响,计算矿体开采过程中地表及建筑物的变形量,并参照我国评判建筑物破坏等级的标准进行评判。通过模拟结果表明,岩层移动是一个自下而上传递的动态过程,地下开采对地表金智尾矿库产生的下沉变形大,为56cm,同时地表也产生了大量塑性扰动区,说明金智尾矿库处于不稳定的状态,在井下开采之前须闭库停止使用。
To ensure the safety of Jinzhi tailings pond,influence of underground mining on surface is simulated by FLAC3 D.Deformation degree of surface and building in process of deposit body exploitation are calculated,and judged them refer to the standard of judge damage grade of buildings in China.Simulation results show that strata movement is a dynamic process of transfer from bottom to top,and subsidence deformation of Jinzhi tailings pond is very great,as 56 cm,at the same time the surface also produces the plastic disturbed zone,which illustrates that the Jinzhi tailings pond of surface is in a unstable state.The Jinzhi tailings pond must be closed to stop using before underground mining.
To ensure the safety of Jinzhi tailings pond,influence of underground mining on surface is simulated by FLAC3 D.Deformation degree of surface and building in process of deposit body exploitation are calculated,and judged them refer to the standard of judge damage grade of buildings in China.Simulation results show that strata movement is a dynamic process of transfer from bottom to top,and subsidence deformation of Jinzhi tailings pond is very great,as 56 cm,at the same time the surface also produces the plastic disturbed zone,which illustrates that the Jinzhi tailings pond of surface is in a unstable state.The Jinzhi tailings pond must be closed to stop using before underground mining.
引文
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[2]匡忠祥,宋卫东.地下金属矿山灾害防治技术[M].北京:冶金工业出版社,2008.
[3]陈育民,徐鼎平.FLAC/FLAC3D基础与工程实例[M].北京:中国水利水电出版社,2009.
[4]郑榕明,陈文胜.金山店铁矿地下开采引起地表变形规律的离散元模拟研究[J].岩石力学与工程学报,2002,21(8):1130-1135.
[5]陈清运,蔡嗣经.地下开采地表变形数值模拟研究[J].金属矿山,2004(6):19-21.
[6]邱景平,张国联,邢军,等.小官庄铁矿试验矿块胶结充填试验研究[J].有色金属(矿山部分),2011,63(5):11-14.
[7]张志雄.二道河铁矿地下开采顶板下沉和地表沉降监测控制标准探讨[J].昆明理工大学学报,2013,38(2):34-37.