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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第11期    总第303期    2019年11月

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文章编号:1672-7207(2019)11-2773-10
侵入接触型隧道突泥涌水危险性评估的变权-靶心贴近度模型
李朝阳1, 2,王迎超1, 2,刘洋2,焦庆磊2,王密田2,张野2

(1. 中国矿业大学 深部岩土力学与地下工程国家重点实验室,江苏 徐州, 221116;
2. 中国矿业大学 力学与土木工程学院,江苏 徐州, 221116
)

摘 要: 为了对侵入接触型隧道突泥涌水危险性进行评估,建立变权理论与靶心贴近度法相结合的优化评估模型。以双丰隧道为工程背景,选取被侵入围岩的透水性、接触带岩体基本质量指标、接触带岩体风化程度等7个指标构建评价指标体系,并建立突泥涌水危险性分级标准。在确定常权权重后,根据指标取值进行变权赋权,再运用靶心贴近度法对突泥涌水的危险性等级进行评定,并分析各指标的致灾性,据此指导后续施工设计。研究结果表明:代表灾害源的指标(岩体基本质量指标、地下水位)致灾性最强,且经过变权计算,3个主控指标(岩体基本质量指标、地下水位、接触带岩体风化程度)的权重之和降低了近5%,危险性等级由Ⅱ级升为Ⅰ级,更加符合工程实际,也证明了本模型的有效性和准确性。

 

关键词: 变权理论;靶心贴近度;侵入接触型隧道;突泥涌水

Model on variable weight-target approaching for risk assessment of water and mud inrush in intrusive contact tunnels
LI Zhaoyang1, 2, WANG Yingchao1, 2, LIU Yang2, JIAO Qinglei2, WANG Mitian2, ZHANG Ye2

1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, China;
2. School of Mechanics & Civil Engineering, China University of Mining & Technology, Xuzhou 221116, China

Abstract:For the risk assessment of water and mud inrush in intrusive contact tunnels, a new model was proposed based on the variable weight theory and the degree of target approaching. Firstly, seven influencing factors including permeability of intruded surrounding rock, BQ(basic quality index of rock mass) of contact zone and weathering degree of contact zone, etc, were selected as evaluation indexes. Meanwhile, the risk grading standard of water and mud inrush in tunnels was introduced based on related references. Secondly, after the constant weight was determined, the variable weight was given according to the value of the indexes, then, the degree of target approaching method was used to evaluate the risk level of water and mud inrush. The hazard strength of each evaluation index was analyzed to guide the subsequent engineering construction and design. The results show that the evaluation indexes representing the source of disasters(BQ of contact zone and groundwater level) are strongly catastrophic. After the calculation of variable weight, the sum of the weights of three main indexes, i.e., BQ of contact zone, groundwater level and weathering degree of contact zone, is reduced by nearly 5%. And the risk level increases from level II to level I, which is more suitable for engineering practice and verifies the validity and accuracy of the model.

 

Key words: variable weight theory; degree of target approaching; intrusive contact tunnels; water and mud inrush

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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