Rock burst danger monitoring and early warning method based on dynamic and static combined stress analysis

A technology of rock burst and combined stress, which is applied in the fields of earth drilling, mining equipment, mining equipment, etc., can solve the problems of mining information sources by scientific means and the inability to realize the quantitative description of the danger degree of rock burst dangerous areas, and achieve universal application Strong performance and operability, high prediction efficiency, and good application feasibility

Active Publication Date: 2020-11-20
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology

[0007] However, in the above-mentioned prior art, it is impossible to calculate the rock burst risk comprehensive index of the influencing factors on the rock burst risk or to input the monitored parameters into the computer for comprehensive analysis, and it is impossible to realize the identification of the rock burst dangerous area and its dangerous degree. Quantitative description, and then achieve the purpose of precise early warning, and how to use e

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  • Rock burst danger monitoring and early warning method based on dynamic and static combined stress analysis
  • Rock burst danger monitoring and early warning method based on dynamic and static combined stress analysis
  • Rock burst danger monitoring and early warning method based on dynamic and static combined stress analysis

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[0053] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0054] The stress field disturbance caused by the excavation of the underground coal mass forms a stress concentration area exceeding the stress of the original rock in the lateral direction in the front of the working face and in the coal mass around the roadway, that is, the support stress area. Simultaneous excavation causes overlying rock damage and migration, such as figure 1 As shown, the collapse zone, crack zone and bending subsidence zone are formed in the longitudinal direction, and correspond to the post-peak failure zone DE, pre-peak plastic zone BD and elastic zone AB in the transverse bearing stress zone, respectively.

[0055] Und...

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Abstract

The invention discloses a rock burst danger monitoring and early warning method based on dynamic and static combined stress analysis, which is used for monitoring and early warning rock burst danger based on a rock burst mechanism induced by superposition of a dynamic load effect and a static load effect in combination with a dynamic and static combined effect. According to the dynamic and staticcombined effect, parameter weights of a dynamic load effect parameter of seismic wave attenuation accumulation reconstruction, a static load effect parameter of seismic wave CT inversion and a staticload effect parameter of micro-seismic damage reconstruction are determined respectively; and a dynamic and static combined stress coefficient is calculated by adopting a weighted average method, anda final dangerous area and a dangerous degree thereof are comprehensively determined by combining the dynamic load stress coefficient of the instantaneous dynamic load stress increment of the mine pressure. The method has the advantages of clear calculation model and high universality and operability, realization of quantitative analysis of prediction of the rock burst dangerous area and the dangerous degree of the rock burst dangerous area, and good application feasibility.

Description

technical field [0001] The invention relates to a rock burst risk monitoring and early warning method based on dynamic and static combined stress analysis. Background technique [0002] Rockburst, also known as rockburst, refers to the phenomenon of sudden failure in the surrounding rock mass in the deep part of the underground mining or in areas with high structural stress. It is the energy accumulated in the roadway and the coal rock mass of the stope. Under the disturbance of mine vibration load, it is released suddenly, throwing the coal and rock mass to the roadway, and at the same time, a strong sound occurs, causing dynamic phenomena such as vibration and destruction of the coal and rock mass, damage to supports and equipment, casualties, and damage to some roadways. [0003] According to long-term theoretical research, laboratory tests, and field tests, it is agreed that the occurrence of rock burst satisfies the induction principle of superposition of dynamic and st...

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Application Information

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IPC IPC(8): E21F17/00E21F17/18
CPCE21F17/00E21F17/18
Inventor 蔡武曹安业窦林名巩思园何江贺虎王桂峰袁莎莎葛庆
Owner CHINA UNIV OF MINING & TECH
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