Comprehensive quantitative determination method for grouting reinforcement effect of underground engineering crushed surrounding rocks

Abstract

The invention discloses a comprehensive quantitative determination method for grouting reinforcement effect of underground engineering crushed surrounding rocks. The method is based on four technological detection meanings, and the four meanings comprise surrounding rock boring coring, detection by a ground penetrating radar, borehole inspection detection and in-situ strength detection on bored surrounding rock. By using the four detection meanings for respective statistics and analysis, the surrounding-rock boring coring enhancement rate, the damage area reinforcing enhancement rate, the crack closing enhancement rate, the strength parameter enhancement rate and other parameters before or after grouting are obtained. The grouting reinforcement effect is subjected to comprehensive quantitative analysis through a weight analysis method, and a quantitative evaluation index for the grouting reinforcement effect is established, and scientific reasonable evaluation is performed on the grouting reinforcement effect of the underground engineering crushed surrounding rock. The comprehensive quantitative determination method for the grouting reinforcement effect of underground engineering crushed surrounding rocks overcomes the disadvantages that a conventional technology for the grouting reinforcement effect of underground engineering crushed surrounding rocks is behindhand in detection meaning and single in evaluation method, cannot realize quantization and the like. The provided comprehensive quantitative determination method is advanced in detection meaning, relatively novel and relatively scientific compared with a conventional experiential qualitative analysis method.

Description

technical field [0001] The invention relates to a comprehensive quantitative detection method for grouting reinforcement effect of broken surrounding rock in underground engineering. Background technique [0002] With the country's increasing investment in transportation, water conservancy and hydropower projects, and the increase in the intensity and depth of coal resource mining, there are more and more long and deep buried tunnels, roadways, and large-section shield tunnels, which have a great impact on engineering construction safety and surrounding rock Stability control presents new challenges. Taking coal mines as an example, about 40% of the coal-measure strata in my country's coal mines are soft rock strata, coupled with the influence of structural stress and stress concentration and other factors, resulting in more broken rock mass, which brings great impact on roadway support and coal mine safety production. threaten. As a traditional reinforcement method, the gr...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome above-mentioned deficiencies in the prior art, provide a kind of comprehensive quantitative detection method of grouting reinforcement effect of broken surrounding rock of underground engineering, overcome existing underground engineering broken surrounding rock grouting reinforcement effect technical detection method backwardness, evaluation Disadvantages such as single method and inability to quantify

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