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Roadway axial full-length impact risk evaluation and risk solving method based on momentum principle

A technique based on the principle of momentum and an evaluation method, which is applied in the fields of earth drilling, mining equipment, mining equipment, etc., can solve the problems of heavy anti-scouring workload and high cost, and achieve high efficiency, easy implementation, and clear thinking of crisis relief Effect

Active Publication Date: 2021-11-30
CHINA COAL RES INST +1
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Problems solved by technology

At present, the prevention and control of rock burst is mainly based on regional scour prevention, and the scour prevention work is carried out comprehensively and without differences in the region. The workload of scour prevention is huge and the cost is extremely high

Method used

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  • Roadway axial full-length impact risk evaluation and risk solving method based on momentum principle
  • Roadway axial full-length impact risk evaluation and risk solving method based on momentum principle
  • Roadway axial full-length impact risk evaluation and risk solving method based on momentum principle

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Embodiment Construction

[0033] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0034] After the excavation of the roadway, a rupture zone, a plastic zone and an elastic zone are sequentially formed from the side of the roadway along the transverse direction of the roadway. There is a stress concentration zone in the plastic zone and the elastic zone, and a large amount of elastic energy is accumulated in the stress concentration zone. ...

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Abstract

The invention provides a roadway axial full-length impact risk evaluation and risk solving method based on a momentum principle. The method comprises the following steps: selecting a detection point at the side part of a roadway; if the detection point is a special high-stress concentration area, judging that the detection point is a high-impact dangerous point; if the detection point is a general high stress concentration area, measuring the width of a throwing body at the detection point; and according to the negative correlation between the width of the throwing body and the impact danger, judging the danger level of the detection point. After the technical scheme is adopted, compared with the prior art, the method has the advantages that more detailed impact danger area division can be carried out in the whole axial direction of the roadway, the high-impact danger point can be accurately positioned, the roadway rock burst prevention and control problem is more focused and clear, the roadway rock burst prevention and control workload is greatly reduced, and the anti-impact cost is effectively reduced.

Description

technical field [0001] The present application relates to the technical field of roadway impact risk detection, and in particular to a method for assessing and eliminating the risk of roadway axial full-length impact risk based on the principle of momentum. Background technique [0002] For a long time, scholars at home and abroad have mainly studied rock burst from the perspective of energy. The time domain of the research is the long-term process of rock burst from energy accumulation to energy release. This process may last for several months. The monitoring methods used are mainly Realize continuous long-term monitoring of energy for microseismic, ground sound, and stress gauges. [0003] However, due to the scale and frequency of monitoring, there are very few studies on the dynamics of the instantaneous process of impact. Therefore, although the existing monitoring methods, geodynamic zoning and rock burst prediction models based on energy angles can be used in a certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18E21F17/00
CPCE21F17/18E21F17/00
Inventor 何团李国栋洛锋李春元李向上郑建伟薛珊珊
Owner CHINA COAL RES INST
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