毗邻高铁千米埋深采空区工程勘察及影响研究

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Abstract Research purposes: Railway engineering route selection, construction and normal use are seriously restricted and affected by goaf. The investigation technology and engineering impact evaluation method for the kilometer depth of goaf need further exploration and practice in high-speed railway of China. This paper is based on high-speed railway adjacent to kilometer depth of the Gucheng coal mine goaf. The comprehensive survey technology combined with various methods such as coal mining engineering data collection, surface survey, two deep-source geophysical explorations of controlled source audio magnetotelluric and wide line seismic reflection, and InSAR interpretation, the space position and boundary conditions of ultra-deep buried goaf are identified. The engineering influence of goaf is comprehensively analyzed and evaluated by comprehensive selection of rock movement boundary angle, calculation of influence range, timeliness analysis of surface deformation and deformation monitoring verification. The comprehensive investigation technology and impact analysis method of ultra-deep buried goaf can be improved through the research.
Research conclusions: (1) The goaf boundaries obtained by the methods of mining engineering data collection, field investigation, deep source geophysical exploration, and InSAR interpretation have good consistency and conformity. (2) The boundary angle of rock movement of kilometer-level buried coal mine goaf should be reasonably selected by various methods, such as field measurement method, the specification method, engineering analogy method and probability integration inversion method. (3) The space-time effect analysis and monitoring results show that the goaf has been in a stable stage and hasn't basically affected the safety and stability of railway engineering. (4) The research conclusions can provide reference for engineering investigation and influence evaluation of ultra-deep buried goaf.

Key words： high-speed railway kilometer-level buried goaf comprehensive investigation influence evaluation audio magnetotelluric method seismic reflection method

Received: 11 July 2022

PACS:

U212.22

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	Articles by authors
	SUN Honglin
	HU Qingbo
	YAN Dong

Cite this article:

SUN Honglin,HU Qingbo,YAN Dong. Research on the Engineering Investigation and Influence of Kilometer Buried Goaf Adjacent to High-speed Railway[J]. Journal of Railway Engineering Society, 2022, 39(12): 11-16.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I12/11

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