Non-contact mine ground pressure observing and estimating method

A mine pressure and non-contact technology, applied in force/torque/work measuring instruments, measuring devices, earthwork drilling and mining, etc., can solve the problem of weak forecasting function, inability to share the power supply and transmission channel of the safety monitoring system, and inability to share the KJ coal mine Issues such as the resources of the safety monitoring system, to achieve the effect of reducing the workload
CN101021570AActive Publication Date: 2007-08-22CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH
Publication Date
2007-08-22

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Abstract

The invention is a non-contact mine pressure observing and evaluating method, relating to a technique of monitoring and evaluating relative stress state of mine digging space or tunnel wall rock by non-contact monitoring the electromagnetic radiation information generated by loaded coal and rock, and the observing method: firstly selecting a region to be monitored, aligning the valid receiving direction of an oriented receiving electromagnetic antenna to an test point and obtaining Ei after test and testing until all test points are tested. And the evaluating method: index of mine pressure evaluation adopts average values Ei of electromagnetic radiation strengths of coal and rock, and calculating average value Eavg of all Ei; displaying the test results Ei in figure, and when the obtained electromagnetic radiation strength of a test point is higher than Eavg, the test point is evaluated as a high stress point; a region with two or more continuous test points whose electromagnetic radiation strengths are all higher than Eavg is evaluated as a high stress region; a region with two or more adjacent test points whose electromagnetic radiation strengths sharply increase by twice above or sharply decrease by above 50%, is evaluated as a high stress gradient region.
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Description

technical field

[0001] The invention relates to a technology for monitoring and evaluating the relative stress state of mine excavation space or tunnel surrounding rock through non-contact monitoring of electromagnetic radiation information generated by loaded coal rock mass, belonging to the technical field of mine pressure monitoring and evaluation. Background technique

[0002] In the process of human mining, the mining activities destroy the stress balance state of the original rock, causing the redistribution of the ground stress around the mining space. Around the stope and mining roadway, due to the stress of the surrounding rock, the surrounding rock is deformed, destroyed and moved, and the roof collapses and comes under pressure, the roof and the floor move closer, the support is loaded and shrinks, and the fracture occurs. , There may also be dynamic phenomena such as coal and gas outburst, water inrush, and rock burst.

[0003] Therefore, monitoring and evaluati...

Claims

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