Real-time prediction method for rockburst in non-contact tunnel engineering construction

A tunnel engineering, non-contact technology, applied in earth-moving drilling, radiation pyrometry, optical radiation measurement, etc., can solve the problems of slow feedback, increased cost, high price, etc., to achieve high accuracy and less interference , the effect of high sensitivity

Active Publication Date: 2020-08-11
CHINA RAILWAY 16TH BUREAU GRP CO LTD +1
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Problems solved by technology

[0003] This type of method realizes rockburst prediction to a certain extent, but it has the following obvious shortcomings, or technical limitations: 1. Various sensors often need to be arranged inside the rock mass by drilling holes, and the installation and fixing requirements are high , It takes a long time, and it is difficult to ensure that the sensor should follow the excavation of the working face and move dynamically at the construction site; 2. The risk of damage caused by repeated installation and removal of the sensing element, and the price is expensive; 3. The blurred range of rockburst prediction is not conducive to engineering On-site organization protection, the cost will increase significantly when passive coverage protection is adopted; 4. Existing test results are usually manually given subjective judgments based on experience, the feedback is slow, and the accuracy needs to be improved

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  • Real-time prediction method for rockburst in non-contact tunnel engineering construction
  • Real-time prediction method for rockburst in non-contact tunnel engineering construction

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] refer to figure 1 , is a kind of non-contact tunnel engineering construction rockburst real-time prediction method disclosed by the present invention, comprising the following steps:

[0034] 1. Collect traditional microseismic monitoring and geological survey data during the excavation of existing tunnels, determine the locations where rockbursts occur more frequently in different types of surrounding rocks, and establish a reference database.

[0035] 2. Use advanced geological drilling to obtain rock cores in the area to be excavated, measure the temperature of the obtained rock cores, and conduct isothermal triaxial tests in the laboratory. Here, the isothermal refers to the environment temperature and cores obtained during the test The same temperature at the same time, determine the temperature change of the core temperature during the rapid rise ...

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Abstract

The invention relates to a real-time prediction method for rockburst in non-contact tunnel engineering construction. The real-time prediction method includes the steps of setting up a database, supplementing the database in site, establishing a monitoring system, adjusting a monitoring method in the working process and the like. The real-time prediction method has the effect that rockburst can bepredicted more precisely and quickly.

Description

technical field [0001] The invention relates to the technical field of rockburst prevention, in particular to a non-contact method for real-time prediction of rockburst in tunnel engineering construction. Background technique [0002] At present, the on-site real-time monitoring of rockburst prevention for rockburst breeding process includes monitoring of stress, disturbance stress, microseismic, acoustic emission, electromagnetic radiation, etc., among which microseismic monitoring is the most extensive monitoring method for rockburst. Rockburst microseismic monitoring is to arrange multiple sensors (at least 4) based on the assessed rockburst risk source area to collect elastic wave signals released by rock mass rupture in the rockburst risk source area. The signal is further analyzed to obtain a monitoring method for seismic source parameters such as rupture location, time, and energy. [0003] This type of method realizes rockburst prediction to a certain extent, but it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18G01B11/16G01J5/00
CPCE21F17/18G01B11/16G01J5/00
Inventor 马栋王武现孙毅吴庆红冯义涛武彬华闫肃马利徐华轩李永刚
Owner CHINA RAILWAY 16TH BUREAU GRP CO LTD
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