大冶铁矿实测空区Surpac-FLAC~(3D)耦合稳定性评价

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英文篇名：Stability Assessment of the Actual Measured Goaf Based on Surpac-FLAC~(3D) Coupling in Daye Iron Mine 作者：白欣 ; 朱鹏瑞 ; 万飞 ; 姬智 英文作者：Bai Xin;Zhu Pengrui;Wan Fei;Ji Zhi;School of Electrical and Mechanical Engineering,Handan University;School of Civil and Resource Engineering,University of Science and Technology Beijing; 关键词：空区扫描 ; 地质模型 ; Surpac-FLAC3D耦合 ; 稳定性 英文关键词：Mined-out area scanning;;Geological model;;Surpac-FLAC3D coupling;;Stability 中文刊名：JSKS 英文刊名：Metal Mine 机构：邯郸学院机电学院;北京科技大学土木与资源工程学院; 出版日期：2019-01-15 出版单位：金属矿山 年：2019 期：No.511 语种：中文; 页：JSKS201901028 页数：5 CN：01 ISSN：34-1055/TD 分类号：164-168

摘要

阶段空场嗣后充填法一步矿房采空区稳定性对于保障矿山安全生产至关重要。通过采空区精细探测可得到采空区的准确形态,在FLAC~(3D)软件中将实测空区Surpac模型导入,以大幅度提高空区稳定性分析的准确度,实现数字矿山的可视化。以大冶铁矿为例,利用VS150仪器测得嗣后充填采矿法一步矿房回采的空区探测模型,通过相应的耦合程序,将空区探测模型在FLAC~(3D)软件中真实地展现,将设计的矿体模型与实测空区模型复合,精确得到了矿石回收率与贫化率指标,矿体超采量为1 423.4 m~3,欠采量为1 413.3 m~3,矿房回采质量较高,达到预期效果。结合实际工程岩体力学参数,分析了矿房开挖形成空区后的稳定性。经过现场工程验证,证明了分析的正确性,空区Surpac-FLAC~(3D)耦合分析方法具有较大的应用价值。
        It is very important to ensure the safe production of the mine by keeping the stability of the goaf at one-step ore chamber with the stage open stope and subsequent filling method. The exact shape of goaf can be obtained by accurately detecting of goaf. The Surpac model of goaf is imported into FLAC~(3D)software,which is different from the simple regular shape of ore body model. This method can greatly realize the accuracy of stability analysis and the visualization of digital mine. Taking a Daye Iron Mine as a case,the goaf detection model of one-step chamber stoping with subsequent filling method was measured by VS150 instrument. The goaf detection model can be truly displayed in FLAC~(3D)software through corresponding coupling program. Also,the ore recovery rate and the ore dilution rate can be accurately obtained by combining the designed orebody model with the measured goaf model. The index shows that the overdraft of orebody is 1 423.4 m~3,the undermining is1 413.3 m~3. A high-level recovery rate and an expected result have been achieved. At the same time,combining with mechanics parameters of the actual engineering rock mass,the stability of the goaf after excavation of ore chamber was calculated. According to the field engineering practice,it is proved that this method is correct,and the Surpac-FLAC~(3D)coupled stability system for the goaf is of great value in application.

引文

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