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| Optimization of End-wall Angle of Non-pillar Sublevel Caving Method Based on Multi-method Joint Application |
| Received:January 23, 2015 Revised:February 03, 2015 |
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| DOI： |
| KeyWord:non-pillar sublevel caving method;end-wall angle;recovery rate;ratio difference between the recovery and dilution |
| Author | Institution |
| Zhang Yongda |
北京科技大学土木与环境工程学院 |
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| Abstract: |
| With the background of Shouyun Iron Mine,combining application of physical simulation test and PFC2D numerical simulation test method,respectively study on three different programs that the end-wall angle is 80 degrees, 85 degrees, 90 degrees,and draw out the changing curves of the ore recovery rate,the waste in-ore rate and the ratio difference between the recovery and dilution with under the condition of three different programs.The curves show that when the end-wall angle is about 85 degrees, the ore recovery rate and the ratio difference between the recovery and dilution obtain the optimal value.Furthermore it will provide the scientific basic for the choice of end-wall angle in mine. |
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