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TEST ON GRANULES FLOW PARAMETERS OF ORE DRAWING WITH STOCHASTIC MEDIUM THEORY |
| TAO Ganqiang1，YANG Shijiao1，REN Fengyu2 |
(1. School of Nuclear Resource and Safety Engineering，University of South China，Hengyang，Hunan 421001，China；
2. School of Resource and Civil Engineering，Northeast University，Shenyang，Liaoning 110004，China) |
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Abstract The traditionally measuring method of granules flow parameters in the stochastic medium theory of ore drawing(SMTOD) has certain insufficiency. Because of uncertainty and randomness of granules movement in the process of ore drawing，there is great error in measuring the granules flow parameters. Besides，the flow performance of index granular is different from experimental granular. Moreover，the existing solution method of granules flow parameter is deduced by equation between drawn-quantity and height of drawn-body，and the shape of granules drawn-body measured by this method is different far from actual one. Based on experiment，by improving production and placement method of index particle，a new measurement method to test the granular flow parameters by drawn-body equation is proposed. Four kinds of loose bodies from two mines are used to measure flow parameters. The experimental result indicates that granules flow parameters obtained by the new method match well with those of actual situation. Moreover，the new method is used in Beiminghe Ore Mine to determine rational stope structure parameters，and good technical and economic target is obtained. The recovery ratio and depletion ratio is 90% and 11% respectively. Field application also indicates that the flow parameter of stochastic medium theory of ore drawing can reflect flow characteristics of caved ore and rock well. The new method for measuring granules flow parameters can significantly improve the adaptability of SMTOD in engineering application.
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Received: 28 July 2008
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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