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Method for acquiring physical equivalent strength of heterogeneous rock under strong impact load

A technology of impact load and equivalent strength, applied in the field of effective strength acquisition, to achieve the effect of accurate calculation and high calculation efficiency

Pending Publication Date: 2022-07-29
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0004] In order to solve the technical problem of lack of a reasonable equivalent method for the actual rock medium at present, which leads to the inability to accurately design the construction method and construction process according to the actual situation of the rock when the rock is constructed, the present invention provides a strong impact load Method for obtaining physical equivalent strength of heterogeneous rock

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  • Method for acquiring physical equivalent strength of heterogeneous rock under strong impact load
  • Method for acquiring physical equivalent strength of heterogeneous rock under strong impact load
  • Method for acquiring physical equivalent strength of heterogeneous rock under strong impact load

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specific example

[0075] like figure 2 It is assumed that the length of the tunnel in the low-strength rock mine is about 100m, the height of the tunnel is h, and the end is closed. When an explosion accident occurs, combined with the structural characteristics of the tunnel, the load near the explosion source will be relatively high, as the first In this sub-area, the load at the end of the tunnel will be higher due to the influence of wall reflection. As the third sub-area, the middle is relatively flat, as the second sub-area. Therefore, the pressure change trend is as follows: image 3 shown, image 3 is the change curve of the pressure at the wall with the distance from the accident explosion source. The average sound velocity test results of the three sub-regions are 1500m / s, 2000m / s, and 2500m / s.

[0076] The method for obtaining the physical equivalent strength of heterogeneous rock under strong impact load is as follows:

[0077] 1. According to the distribution characteristics of p...

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Abstract

The invention belongs to a physical equivalent strength obtaining method, and aims to solve the technical problem that a construction method and a construction process cannot be accurately designed according to actual conditions of rocks when the rocks are constructed due to the lack of a method for reasonably equivalently carrying out an actual rock medium at present. According to the method for obtaining the physical equivalent strength of the heterogeneous rock under the strong impact load, the coupled elastic energy and physical equivalent strength of the low-strength heterogeneous rock under the action of the strong load are calculated by introducing a strength equivalent factor related to the elastic energy, and the problem that the physical equivalent strength of the low-strength heterogeneous rock under the complex medium condition cannot be obtained is solved. And when the low-strength rock is subjected to a strong impact load, the coupling elastic energy and the physical equivalent strength are difficult to quantify and calculate.

Description

technical field [0001] The invention belongs to a method for obtaining physical equivalent strength, in particular to a method for obtaining physical equivalent strength of heterogeneous rock under strong impact load. Background technique [0002] With the rapid development of economic construction, there are more and more projects related to rock medium, such as traffic tunnel excavation, mineral mining, explosion protection and so on. Under the traction required by engineering practice, the research on the dynamic mechanical properties and damage of rock under impact load, as well as the mechanical properties and stability under static load or quasi-static load, has become a subject of geotechnical mechanics and blasting. A hot frontier topic in academia. [0003] Rocks in nature can be gradually formed after diagenesis, tectonic deformation and secondary degeneration. Generally, there are defects such as holes, cracks, joints, and faults. Rocks are usually composed of co...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 寿列枫田宙王智环曹渊王宏亮陈锋钟巍王澍霏王海兵程国新张茂钰
Owner NORTHWEST INST OF NUCLEAR TECH