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A detection method for anchor grouting effect of underground engineering rock mass based on microseismic monitoring

A technology for microseismic monitoring and underground engineering, applied in soil material testing, material inspection products, etc., can solve problems such as inaccurate detection of anchor grouting effects, insufficient monitoring of overall section deformation of caverns, and impact on construction progress, etc., to achieve a comprehensive and scientific detection method Reasonable, accurate and reasonable detection of anchor grouting effect, strengthening the effect of deformation monitoring

Active Publication Date: 2017-08-01
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Secondary man-made damage such as drilling is required on the rock mass, which increases the disturbance and damage to the rock mass;
[0007] 2. Insufficient monitoring of the deformation of the overall section of the cavern, resulting in inaccurate and unreasonable detection of anchor grouting effects;
[0008] 3. It needs to be supplemented by indoor tests to determine the anchoring quality effect of the project. The measurement period is long and the process is cumbersome, which affects the construction progress

Method used

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  • A detection method for anchor grouting effect of underground engineering rock mass based on microseismic monitoring
  • A detection method for anchor grouting effect of underground engineering rock mass based on microseismic monitoring
  • A detection method for anchor grouting effect of underground engineering rock mass based on microseismic monitoring

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Embodiment 1

[0063] Based on the microseismic monitoring technology, the present invention combines means such as non-destructive testing and section convergence monitoring to calculate respectively the reduction rate of rock mass excavation disturbance, the reduction rate of rock mass rupture, the improvement rate of component utilization, the reduction rate of component failure, the reduction rate of section convergence, etc. Parameters, and then use the weight distribution to establish comprehensive quantitative detection indicators to scientifically and reasonably detect the anchoring and grouting effect of underground engineering rock mass.

[0064] Concrete steps of the present invention are:

[0065] The first step is data collection.

[0066] A. Select an engineering rock mass with similar overall geological conditions, and divide it into two sections of support along the excavation direction. The first section is non-anchor and grouting support, which is recorded as Z1, and the se...

Embodiment 2

[0079] Another method for determining the equivalent disturbance distance of the rock mass is: the weighted average of the distances from the respective midpoints of the disturbance formation area, disturbance development area, and disturbance reduction area to the excavation face.

[0080] Another method to determine the equivalent fracture distance of rock mass is: respectively obtain the average distances from the top, bottom, left and right sides of the boundary of the excavation section to the boundary of severe fracture zone, moderate fracture zone and general fracture zone, and then calculate The weighted average of the average distances of the severe fracture zone, moderate fracture zone and general fracture zone is the equivalent fracture distance of the rock mass.

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Abstract

The invention relates to a method for detecting a bolting-grouting effect of an underground engineer rock mass based on micro-seismic monitoring. The method comprises the following steps: selecting a corresponding engineering rock mass, adopting non-bolting-grouting supporting and bolting-grouting supporting in front of and at the back of an excavation face of the rock mass respectively, and respectively determining a rock mass equivalent disturbance distance and a rock mass equivalent fracture distance of respective supporting sections in the two supporting modes by using a micro-seismic monitoring apparatus; respectively acquiring a supporting member equivalent utilization rate and a supporting member failure rate of the respective supporting sections in the two supporting modes by using a nondestructive detector; acquiring and making statistics on a mean convergence area of a tunnel section of a corresponding area under different surrounding rock stability states; determining corresponding parameter analysis values, establishing a comprehensive quantitive detection index of the bolting-grouting effect from the parameter analysis values by using a weight analysis method, and guiding bolting-routing work on the site according to the detected bolting-grouting effect.

Description

technical field [0001] The invention relates to a method for detecting anchor grouting effect of underground engineering rock mass based on microseismic monitoring. Background technique [0002] In recent years, on the one hand, the country has continued to increase investment in basic projects such as transportation, water conservancy and hydropower, and on the other hand, in order to alleviate the severe situation of increasingly tense use of ground space, it has also successively increased the development of urban underground space; at the same time, due to coal The increase in mining intensity and depth of mineral resources, such as mineral resources, has put forward higher requirements for the stability of underground engineering rock mass. The anchor injection technology has significant advantages in improving the strength and integrity of the rock mass, exerting the bearing capacity of the supporting components and controlling the deformation of the rock mass, so it h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 王琦潘锐王春河江贝曾昭楠牛晋平王雷孙会彬秦乾徐奴文王保齐刘文江于恒昌高红科栾英成高松
Owner SHANDONG UNIV