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Rock mass quality classification and dynamic parameter estimation method based on blasting vibration test

A technology for blasting vibration and rock mass quality, which is applied to the analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve problems such as large differences in results, complicated operations, and difficulty in implementation, achieving reliable results, simple operations, and saving time and workload. Effect

Inactive Publication Date: 2015-04-29
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have the disadvantages of complicated operations, long time-consuming, difficult implementation in some engineering practices, and large differences in the results obtained under different geological conditions.

Method used

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  • Rock mass quality classification and dynamic parameter estimation method based on blasting vibration test
  • Rock mass quality classification and dynamic parameter estimation method based on blasting vibration test
  • Rock mass quality classification and dynamic parameter estimation method based on blasting vibration test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Cavern geological survey:

[0074] The blasting vibration detection sensor adopts a three-way vibration velocity sensor. During the detection process, each measuring point is equipped with a three-way vibration velocity sensor, which can measure vibration signals in the horizontal radial direction, horizontal tangential direction and vertical direction, and transmit the signals to the multi-channel data collector, and then input them into the computer for storage and analysis. Before the test starts, conduct a preliminary inspection of the object to be tested, and check the three-way vibration speed sensor and multi-channel data collector. The three-way vibration speed sensor is fixed on the measuring point with plaster.

[0075] In this specific implementation, in order to prevent damage to the detection equipment (that is, three-way vibration velocity sensor and multi-channel data collector) during tunnel blasting, the first measuring point of each survey line (that ...

Embodiment 2

[0079] Slope geological survey:

[0080] The same detection equipment as in Example 1 was used. During the excavation process of slope blasting, seven measuring lines are arranged along different directions of the blasting source, as shown in Figure 4 As shown, each measuring line is arranged with multiple measuring points. In order to protect the safety of the detection equipment, the distance between the nearest measuring point and the explosion source on the same measuring line is 15-20m, and the distance between adjacent measuring points is 10-20m.

[0081] Using the same method as in Example 1 to process the blasting vibration signal, the propagation velocity of P wave and S wave between different measuring points during slope blasting excavation can be obtained, and the rock mass quality and dynamic parameters can be judged by the propagation velocity estimate.

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Abstract

The invention discloses a rock mass quality classification and dynamic parameter estimation method based on a blasting vibration test. The rock mass quality classification and dynamic parameter estimation method comprises the following steps: distributing test points according to an ordinary blasting vibration test, acquiring the time of a wave P and a wave S for arriving each test point by virtue of a multi-channel data acquisition unit, and also calculating the propagation velocity of the wave P and the wave S between two test points by virtue of a time difference of the wave P and the wave S for arriving the test points and a distance between the test points to ensure that the rock mass quality between the two test points can be judged and a dynamic elastic modulus of a rock mass between the two test points can be calculated according to the propagation velocity. The rock mass quality classification and dynamic parameter estimation method disclosed by the invention is simple to operate, and can be taken as an effective supplement of conventional geological exploration so as to ensure that a lot of time and workload can be saved; and the rock mass quality classification and dynamic parameter estimation method is suitable for the geological exploration of underground cavities in a blasting excavation process, and is also suitable for the geological exploration of side slopes.

Description

technical field [0001] The invention relates to a method for classifying rock mass and estimating dynamic parameters based on blasting vibration testing, which is applicable to the fields of water conservancy and hydropower engineering, transportation, mining, national defense and the like. Background technique [0002] Rock mass quality classification and dynamic parameters are one of the main factors affecting tunnel engineering design, construction, safety and cost. In the process of rock mass engineering construction, whether it is possible to classify rock mass quality and estimate rock mechanical parameters in a timely, accurate and reasonable manner is very important for construction design and construction progress, as well as accurate estimation of engineering deformation and stability. At the same time, the accuracy of the estimation of mechanical parameters of rock mass under dynamic load directly affects the safety and economy of tunnel engineering. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/07
Inventor 严鹏何琪卢文波陈明邹玉君
Owner WUHAN UNIV
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