毗邻高铁千米埋深采空区工程勘察及影响研究

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摘要 研究目的: 采空区严重制约和影响着铁路工程选线、建设及正常使用。我国针对高速铁路千米级埋深采空区的勘察技术与工程影响评价方法还有待进一步探索与实践,本文以某高速铁路毗邻古城煤矿千米埋深采空区为实例,通过煤矿采掘工程资料收集、地表调查、可控源音频大地电磁和宽线地震反射两种深源物探探测,以及InSAR解译等多种综合勘察技术,查明超深埋采空区空间位置及边界条件;经采空区岩移边界角综合选取、影响范围计算、地表变形时效性分析及变形监测验证,综合分析评价采空区对工程的影响。通过研究可完善采空区的综合勘察技术及影响分析方法。
研究结论: (1)采掘工程资料收集、现场调查、深源物探探测,以及InSAR解译等多种勘察方法,获取的采空区边界具有较好的一致性、符合性;(2)千米级埋深采空区岩移边界角宜采用实测法、规范法、工程类比法与概率积分反演法等进行综合选取;(3)采空区地表变形时空效应分析及变形监测验证结果表明,采空区已进入稳定阶段,已基本不影响铁路工程安全稳定;(4)本研究结论可为超深埋采空区工程勘察及影响评价提供参考。

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	孙红林
	胡清波
	严栋

关键词 ：高速铁路, 千米级埋深, 采空区, 综合勘察, 影响评价, 音频大地电磁法, 地震反射法

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

收稿日期: 2022-07-11

PACS:

U212.22

基金资助:中国铁路总公司科技研究开发计划课题(2017G008-J);中铁第四勘察设计院集团有限公司科技研究开发计划项目(2018K022)

作者简介: 孙红林,1973年出生,男,正高级工程师,注册土木(岩土)工程师。

引用本文:

孙红林, 胡清波, 严栋. 毗邻高铁千米埋深采空区工程勘察及影响研究[J]. 铁道工程学报, 2022, 39(12): 11-16.
SUN Honglin, HU Qingbo, YAN Dong. Research on the Engineering Investigation and Influence of Kilometer Buried Goaf Adjacent to High-speed Railway. Journal of Railway Engineering Society, 2022, 39(12): 11-16.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2022/V39/I12/11

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