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Optimization of end-wall angle in non-pillar sublevel caving method based on multi-method joint application |
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DOI:10.3969/j.issn.1671-4172.2015.04.002 |
KeyWord:non-pillar sublevel caving method; end-wall angle; recovery rate; ratio difference between recovery and dilution |
Author | Institution |
ZHANG Yongda |
(1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京;2. 北京科技大学 土木与环境工程学院,北京 ) |
LIANG Xinmin |
(1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京;2. 北京科技大学 土木与环境工程学院,北京 ) |
MING Jian |
(1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京;2. 北京科技大学 土木与环境工程学院,北京 ) |
XIE Jingpeng |
(1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京;2. 北京科技大学 土木与环境工程学院,北京 ) |
WANG Li |
(1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京;2. 北京科技大学 土木与环境工程学院,北京 ) |
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Abstract: |
With the engineering background of Shouyun Iron Mine, physical simulation test and PFC2D numerical simulation test method are combined to study on three different programs that the end-wall angle is 80°, 85° and 90°respectively, and the changing curves of the ore recovery rate, the waste in-ore rate and the ratio difference between recovery and dilution are drawn out under the condition of three different programs. The curves show that when the end-wall angle is about 85°, the ore recovery rate and the ratio difference between recovery and dilution obtain the optimal value. Furthermore it will provide scientific basis for the choice of end-wall angle in mine. |
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