大冶铁矿实测空区Surpac-FLAC3D耦合稳定性评价

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FLAC3D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FLAC3D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 m3，欠采量为1 413.3 m3，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-FLAC3D耦合分析方法具有较大的应用价值。

Stability Assessment of the Actual Measured Goaf Based on Surpac-FLAC3D Coupling in Daye Iron Mine

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 FLAC3D 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 FLAC3D 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 m3，the undermining is 1 413.3 m3. 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-FLAC3D coupled stability system for the goaf is of great value in application.