Method, system and equipment for quantitative detection of time-varying weakening of surrounding rock and design of reinforcement plan

Abstract

The application discloses a method, system and equipment for quantitative detection of time-varying weakening of surrounding rock and design of a reinforcement plan. During the construction process of underground engineering, the physical and mechanical properties of surrounding rock mass often produce time-varying weakening effects due to changes in the occurrence environment. The method, system and equipment can be used to quantitatively obtain the time-varying weakening degree of surrounding rock in real time. Among them, the detection method mainly includes the following steps: obtaining on-site the initial surrounding rock strength at different depths when the excavation body is not weakened at the set observation area; calculating the average strength of the initial surrounding rock through the initial surrounding rock strength; After the set time, the surrounding rock strength at different depths at the set observation area is acquired on the spot, and the average strength of the surrounding rock is calculated; the variation of the average strength of the surrounding rock relative to the initial average strength of the surrounding rock is compared; according to According to the changes, the surrounding rock support form and / or the contingency design scheme of the reinforcement range are given.

Description

technical field [0001] The present disclosure generally relates to the technical field of underground engineering safety, and in particular to a method, system and equipment for quantitative detection of time-varying weakening of surrounding rock and reinforcement plan design. Background technique [0002] With the continuous development of underground engineering construction in my country, underground engineering construction gradually extends to complex geological conditions. Due to the complexity of the rock formation itself and the limitations of the detection range and accuracy of existing detection technologies, it may be encountered during the excavation of roadways. The situation of gushing water from water-rich rock formations. Since the properties of surrounding rocks vary widely, the weakening and hydrolysis characteristics of different rocks after contact with water are also different. In the existing underground engineering construction design, the method of dr...

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Problems solved by technology

[0004] 1. Due to the complexity of the geological conditions at the construction site, it is often difficult to obtain complete samples during drilling and coring of surrounding rocks, and it is often difficult to obtain accurate results in laboratory tests

[0005] 2. The on-site rock samples are susceptible to weathering and other influences during transport to the laboratory, and the rock properties have changed. The obtained data cannot accurately reflect the initial physical properties and mechanical parameters of the local rocks

[0006] 3. Using the drilling method takes a long time interval from on-site coring to getting the test report, which seriously restricts the progress of the construction and increases the cost of the project budget

[0007] 4. Since the cores taken have been separated from the original environmental stress, temperature and other constraints, especially the sampling of the original rock area, it cannot well represent the strength of the rock mass itself

[0008] 5. Although the indoor test can be used to treat the rock samples with soaking water, it is still difficult to simulate the watering state of the rock on site, and the research on the weakening characteristics of the rock is not accurate enough

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