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| Research on principles and methods of roadway support design under conventional conditions |
| HOU Gongyu1,2,LIANG Jinping3,LI Xiaorui4 |
(1. School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China;2. Department of mining engineering,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830091,China;3. China Petroleum Pipeline Engineering Corporation,Langfang,Hebei 065000,China;4. College of Geological Engineering,Institute of Disaster
Prevention,Sanhe,Hebei 065201,China) |
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Abstract At present,the total footage of roadway excavation exceeds 12 000 km/a,but the roadway support design is basically carried out by using the engineering analogy method. On the basis of summarizing the existing roadway support design theories and methods,the roadway support design principles and design methods are proposed starting with the basic characteristics of roadway support design and the mechanics principles of roadway excavation,as:(1) The influence factors such as the magnitude of in-situ stresses,the geomechanical parameters and indexes of the surrounding rock,the strength of the surrounding rock and the classification of the surrounding rock should be taken into consideration comprehensively,and their values should be determined accurately. (2) The basic features of roadway support design and the mechanical effects of roadway excavation under different surrounding rock geological conditions should be analyzed correctly. (3) The interaction mechanism between the surrounding rock and the support of the roadways with different surrounding rock types should be understood and analyzed correctly. (4) Accurate calculations of the pressure and deformation of the surrounding rock are necessory in accordance with the interaction mechanism between the surrounding rock and the support. In order to accurately understand the principle of interaction between the surrounding rock and the support,this paper briefly gives an analytical method for the whole process of the interaction between the surrounding rock and the support in the elasto-plastic deformation stage. The content,principle,method and process of roadway support design proposed in this paper can provide theoretical basis for the preparation of roadway support design specifications.
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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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