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| DEFORMATION AND SUPPORT OF ROCK ROADWAY AT DEPTH MORE THAN 1 000 METERS |
| KANG Hongpu1，2，3，FAN Mingjian1，2，3，GAO Fuqiang1，2，3，ZHANG Hui1，2，3 |
(1. Coal Mining and Designing Branch，China Coal Research Institute，Beijing 100013，China；
2. Coal Mining and Designing Department，Tiandi Science and Technology Co.，Ltd.，Beijing 100013，China；
3. State Key Laboratory of Coal Mining and Clean Utilization，Beijing 100013，China) |
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Abstract To solve the supporting issues related to the roadways at depths more than 1 000 m in Xinwen coal mining area，the mechanical parameters，such as the in-situ stresses，the strengths and the structures of surrounding rocks，the deformation and damage states of surrounding rocks of deep roadway and the supports in coal mines， were analyzed. The deformation and damage characteristics of rocks surrounding a rock roadway with depth more than 1 000 m under various supporting types and parameters were simulated with UDEC. Based on the in-situ test data and numerical simulation results，the full section reinforcement with the high strength and pretension rock bolts and cables combined with grouting was put forward for the support of No.1180 main return roadway in Huafeng coal mine，Xinwen coal mining area. The underground test was described in detail，including the support parameters，materials，underground construction technologies for cables and grouting in roadway floor，and monitoring results. The supporting effects were evaluated through the analyses on the data of surrounding rock displacements，roof separations and the loads along bolts and cables. The underground test results confirmed that the large deformation of surrounding rock in the main return roadway with depth more than 1 000 m was effectively controlled，and the long term stability was kept by means of the combined support system of high pretension and strength bolts and cables with grouting.
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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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2015, Vol. 34 
