Determination method for stability evaluation index of linear structure on ground surface in underground goaf

Abstract

The invention belongs to the field of structure stability evaluation and particularly discloses a determination method for a stability evaluation index of a linear structure on the ground surface in an underground goaf. The method is used for realizing stability comprehensive evaluation of the linear structure on the ground surface in the underground goaf; and a scientific basis is provided for risk prevention and control. The method is implemented by comprising the steps of 1, building an evaluation system model for the linear structure on the ground surface in the underground goaf, and determining an evaluation factor set; 2, determining a comment set; 3, performing calculation by utilizing an analytic hierarchy process to obtain weights of influence factors, and determining a weight set; 4, calculating a single-factor evaluation matrix and performing comprehensive evaluation to obtain a comprehensive evaluation result; and 5, according to the evaluation result, sending out corresponding early warnings. According to the method, the influence factors influencing the stability of the linear structure on the ground surface in the underground goaf are considered more comprehensively; a perfect evaluation system is established; the problems of the linear structure on the ground surface in the underground goaf can be accurately and timely discovered; safety early warnings of different levels are generated according to the comprehensive evaluation result; and the method is of important significance for guaranteeing the safety of the structure.

Description

technical field [0001] The invention relates to a structure stability evaluation method, in particular to a method for determining the stability evaluation index of ground linear structures in an underlying goaf, which can be used for safety evaluation and prediction of disasters of large linear structures near the surface of the underlying goaf. Background technique [0002] The coal industry occupies a long-term and stable basic position in the national economy, and the national conditions determine that China has a huge demand for coal. After the massive mining of coal resources, a large-scale hollow area is formed underground, that is, the goaf. In recent years, with the rapid development of urbanization, a large number of large linear structures such as roads, tunnels, railways, canals, bridges and underground pipelines have been commonly built. Due to the destruction of the rock mass structure after underground mining, it has caused near-surface subsidence, Displaceme...

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Problems solved by technology

[0003] The most commonly used method for the theoretical calculation of mining damage evaluation is the probability integral method. Due to the complexity, heterogeneity and unpredictability of underground engineering geological bodies, the engineering parameters of rock formation movement that are unchanged in other areas are used to predict changes in another area. Geology, whose accuracy is questionable

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