A monitoring and early warning method for rockburst hazard based on dynamic and static combined stress analysis

Abstract

The invention discloses a monitoring and early warning method for rock burst risk based on dynamic and static combined stress analysis, which is based on the superposition of dynamic load effect and static load effect to induce rock burst mechanism, and combined with dynamic and static combined effects to monitor and early warning of rock burst risk; dynamic and static Combination effect By separately determining the dynamic load effect parameters of shock wave attenuation cumulative reconstruction, the static load effect parameters of shock wave CT inversion and the static load effect parameters of microseismic damage reconstruction parameter weights, the dynamic and static combined stress is calculated using the weighted average method The final dangerous area and its dangerous degree are comprehensively determined in combination with the dynamic load stress coefficient of the instantaneous dynamic load stress increment of mine pressure. It has the advantages of clear calculation model, universal applicability and strong operability, and can realize the quantitative analysis of rock burst dangerous area and its dangerous degree prediction, and has 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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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 existing monitoring methods to quantify and determine the two effects of dynamic and static loads in the induced mechanism of rock burst and their superposition, is the key to realizing accurate early warning of rock burst and its results The key to quantification; in addition, it is difficult for coal mine technicians to effectively use scientific means to mine essential and useful information sources in the face of multi-source and massive monitoring data

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