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| Strength requirement for cemented backfill in rectangular drift of underhand cut-and-fill mining in Maoping mine |
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Received:November 17, 2021
Revised:January 18, 2022
Accepted:February 14, 2022
Published Online:June 10, 2022
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| DOI： |
| KeyWord:underhand cut-and-fill mining; drift backfill; backfill strength; Mitchell method; floating factor of safety; optimization; cemented filling cost |
| Author | Institution |
| jiangheguo |
彝良驰宏矿业有限公司 |
| yutiancheng |
彝良驰宏矿业有限公司 |
| liuguangsheng |
矿冶科技集团有限公司 |
| yanglang |
彝良县应急管理局 |
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| Abstract: |
| By using the analysis methods of simply supported beam, thin plate and Canadian Mitchell theoretical model in elasticity, combined with the physical and mechanical parameters of tailings cemented backfill, the theoretical strength demand of the roof of downward rectangular drift backfill is calculated. At the same time, through the strength test data of slurry taking and curing filling body in the filling station in recent two years, the floating safety factor that can quantitatively characterize the industrial dispersion of the actual filling strength is statistically analyzed, and finally the actual strength demand of the downward drift filling body suitable for the filling quality control level of the enterprise at the present stage is obtained. The final result of the above work is to match and optimize the filling ratio design parameters. Through research and test, the purpose of reasonably reducing the cost of cemented filling and improving the comprehensive economic benefit of the mine is achieved. At the same time, it provides a reference for the optimization of filling strength demand of downward drift in similar mines. |
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