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STUDY ON DYNAMIC LOAD DISTRIBUTION ON KEY ROOF BLOCKS
OF UNDER THICK SANDY SOIL STRATUM |
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Abstract By dynamic simulation model tests，the distribution law of dynamic load of key roof stratum and the law of transmission of dynamic load on key roof blocks，key block A，B and C，are revealed. There are 4 load areas on the key roof stratum，and the mining face is just under the load reducing area of key block B. During the roof structure movement，the load of key block B will reduce by about 50% in about 30 minutes. These results are considerable significance to the understanding of the soil damage mechanism under mining and to the establishment of the theory of dynamic roof structure.
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Received: 30 March 2004
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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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