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| Stability Analysis and Treatment Measures of High-speed Railway Adjacent to Deep Coal Mine Goaf |
| YAN Dong |
| China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430063, China |
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Abstract Research purposes: With the rapid development of high-speed railway, railway route selection will inevitably be restricted by the influence of deep coal mine goaf. Such goaf has the characteristics of thick overburden layer, large buried depth of coal seam, thick coal seam and large-scale deformation of surface after mining. The surface deformation of coal mine goaf has significant security risks for the safe operation of high-speed railway. Accurately identifying the boundary conditions of the coal mine goaf and evaluating the stability of the site are the core issue of safety and stability of railway. Taking the deep coal mine goaf adjacent to high-speed railway as an engineering example, the engineering geological conditions and boundary conditions of deep coal mine goaf are identified by using comprehensive survey technology, and the stability of the site is comprehensively evaluated by surface deformation monitoring. It provides a reliable basis for railway safety pillar and engineering protection measures, so as to ensure the safety and stability of high-speed railway.
Research conclusions: (1) By using comprehensive investigation methods such as coal mining data, surface deformation survey, geophysical exploration and deep hole drilling, the boundary range of deep goaf is comprehensively determined. (2) According to the monitoring results of surface deformation and the deformation trend interpreted by InSAR, the stability of goaf is comprehensively evaluated by timeliness analysis. (3) The influence range of surface deformation in planned mining area is predicted by probability integral method, and the width of protecting pillar is determined safely and reasonably. (4) Protective measures of railway engineering and coal mine mining control measures are proposed. (5) The research conclusions can provide reference for stability evaluation of similar goaf.
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Received: 18 March 2022
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2022, Vol. 39 
