Method for correcting surrounding rock pressure based on rock mass joint characteristics and blasting vibration effect

A technology of blasting vibration and surrounding rock pressure, which is applied in special data processing applications, electrical digital data processing, instruments, etc., and can solve the problems of not considering the influence of joint characteristics and blasting effects, etc.

Active Publication Date: 2019-09-24
SHANGHAI TONGYAN CIVIL ENGINEERING TECHNOLOGY CORP LTD
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Problems solved by technology

[0005]Because there are widely distributed joint fissures inside the rock mass, and the blasting vibration during tunnel excavation makes the joint fissures expand to a certain extent, which has a certain impact on the surrounding rock pressure. However, the above calculation methods do not take into account the influence of joint characteristics and blasting effects.

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  • Method for correcting surrounding rock pressure based on rock mass joint characteristics and blasting vibration effect
  • Method for correcting surrounding rock pressure based on rock mass joint characteristics and blasting vibration effect
  • Method for correcting surrounding rock pressure based on rock mass joint characteristics and blasting vibration effect

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Embodiment Construction

[0047] Hereinafter, specific implementation cases of the present invention will be described in detail with reference to the accompanying drawings.

[0048] figure 1 A method for correcting surrounding rock pressure based on rock mass joint characteristics and blasting vibration effects is described, including:

[0049] (1) Obtain the occurrence of tunnel rock mass joints based on the on-site geological sketch, mainly including inclination, inclination, trace length, spacing, filler, filling thickness, opening displacement, roughness, etc., and the statistics of joints on each tunnel face are different Should be less than 30 groups.

[0050] (2) Make an extreme value contour map according to the inclination and inclination, such as figure 2 As shown, where the radial straight line represents the inclination, along the counterclockwise direction, from E to S to W to N directions are 0 to 90° to 180° to 360°, and the circumferential line represents the inclination angle, from...

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Abstract

The invention relates to a method for correcting surrounding rock pressure based on rock mass joint characteristics and a blasting vibration effect. The method mainly solves the technical problem that an existing surrounding rock pressure test does not consider influences of the joint characteristics and the blasting effect. The method comprises the following implementation steps: (1) obtaining a tunnel rock mass joint attitude based on on-site geological sketch; (2) utilizing statistical analysis to obtain dominant joint occurrence characteristics; (3) establishing a numerical model based on the on-site blasting parameters, and obtaining blasting vibration stress waves; (4) establishing a discrete element calculation model based on the dominant joint characteristics, applying blasting vibration stress waves, performing tunnel excavation, and determining a surrounding rock loose circle range; and (5) determining a loose circle range according to the designed surrounding rock pressure, calculating a correction coefficient and correcting the surrounding rock pressure. The method comprehensively considers influence of the rock mass joint characteristics and the blasting vibration effect on the tunnel surrounding rock, and provides support for the design of the tunnel supporting structure.

Description

technical field [0001] The invention relates to the technical field of tunnel surrounding rock pressure testing, in particular to a method for correcting surrounding rock pressure based on rock mass joint characteristics and blasting vibration effects. Background technique [0002] The surrounding rock pressure is the main load borne by the tunnel support structure, and it is also the main basis for the design of the tunnel support structure. At present, the main calculation methods of tunnel surrounding rock pressure include Terzaghi limit equilibrium method, soil column theory, Platts equilibrium arch theory, deep and shallow burial method, etc. [0003] Patent CN106383945A discloses a method for calculating vertical surrounding rock pressure in deep and shallow buried tunnels and underground spaces. According to the geological conditions of the surrounding rock and the classification of the surrounding rock, the physical parameters are determined and the vertical ground ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘学增桑运龙杨昕
Owner SHANGHAI TONGYAN CIVIL ENGINEERING TECHNOLOGY CORP LTD
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