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| CONTROL OF ABNORMAL WEIGHTING IN FULLY MECHANIZED/
CAVING FACE OF DEEP SHAFT |
| JIANG Fuxing1，ZHU Sitao1，LIU Jinhai1，WANG Fuqi2，SUN Hongjiang2，RUAN Guoqiang2 |
| (1. School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China；2. Yankuang Group Limited Company，Zoucheng，Shandong 273500，China) |
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Abstract By accident investigation，theoretical analysis and field measurement，this paper studies the occurrence mechanism，control methods，the risk?s regionalization and grading evaluation method of abnormal weighting in fully mechanized/caving face of deep shaft. Following results are obtained：(1) The main affecting factors of abnormal weighting in working face are roof weighting，roof water，roof control distance increasing，low setting load，mining height change，fault，advance speed and the superposition of these factors. (2) The occurrence mechanism of abnormal weighting was the imbalanced relationship between roof structure and support，which caused by these factors and result in roof abnormal activities and support subjected to abnormal forces. (3) The control methods of abnormal weighting are evaluated before mining，pretreatment risk area，implement mine pressure observation in the process of mining，reducing the risk by using roll steering working face，reduce mining height properly，improving setting load，draining water or strengthening the roof in advance，pre-splitting roof，accelerating advance speed and optimizing support resistance，ect. The research results have been applied to Zhaolou coal mine coal face 1306 with a good result，so as to avoid the support crushing accident effectively.
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Received: 30 January 2013
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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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2013, Vol. 32 
