| Quality evaluation of layerlike backfilling and flow pattern of backfill slurry in stope |
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| 作者姓名： | 彭欣 李夕兵 张钦礼 王新民 |
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| 作者单位： | School of Resources and Safety Engineering Central South University，School of Resources and Safety Engineering Central South University，School of Resources and Safety Engineering Central South University，School of Resources and Safety Engineering Central South University，Changsha 410083 China，Changsha 410083 China，Changsha 410083 China，Changsha 410083 China |
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| 摘 要： | Stability condition and quality evaluation formula of layerlike backfilling roof,Q≥C,where Q denotes is quality index depending on allowable compressive or tensile strength and integrity of backfilling,and C is the technical index depending on mining method and backfilling technology,were inferred according to simply supported beam theorem.Technical treatment measures for instable backfilling roof,including optimum of appropriate filling materials and dosage for excellent flow property and reduction of backfill cost.It is proved that slope equation of backfill slurry in a stope to be filled is y=hexpx2/(2σ)2)],where h is height of cone and σ2 is mean square,and that optimum drainage point of backfill slurry can be determined by the equation and sizes of stope.Case study indicates that the results can give a theoretical support for quality evaluation and control of layerlike backfilling.
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| 关 键 词： | 质量评价 回填土 采矿 泥浆 |
| 收稿时间： | 12 January 2007 |
| 修稿时间： | 2007-01-122007-03-27 |
Quality evaluation of layerlike backfilling and flow pattern of backfill slurry in stope |
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| Peng Xin , Li Xi-bing , Zhang Qin-li and Wang Xin-min.Quality evaluation of layerlike backfilling and flow pattern of backfill slurry in stope[J].Journal of Central South University of Technology,2007,14(4):580-583. |
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| Authors: | Peng Xin Li Xi-bing Zhang Qin-li and Wang Xin-min |
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| Affiliation: | School of Resources and Safety Engineering, Central South University, Changsha 410083, China |
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| Abstract: | Stability condition and quality evaluation formula of layerlike backfilling roof, Q⩾C, where Q denotes is quality index depending on allowable compressive or tensile strength and integrity of backfilling, and C is the technical index depending on mining method and backfilling technology, were inferred according to simply supported
beam theorem. Technical treatment measures for instable backfilling roof, including optimum of appropriate filling materials
and dosage for excellent flow property and reduction of backfill cost. It is proved that slope equation of backfill slurry
in a stope to be filled is y=hexp−x
2/(2σ)2)], where h is height of cone and σ
2 is mean square, and that optimum drainage point of backfill slurry can be determined by the equation and sizes of stope.
Case study indicates that the results can give a theoretical support for quality evaluation and control of layerlike backfilling.
Foundation item: Project(50490270) supported by the National Natural Science Foundation of China |
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| Keywords: | layerlike backfilling quality evaluation flow pattern simply supported beam |
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