Method for monitoring rock burst dangerousness in coal underground mining process

Abstract

The invention belongs to the technical field of coil mining, and particularly relates to a method for monitoring rock burst dangerousness in the coal underground mining process. According to the method, two detection holes are formed in the two sides of a strong rock burst dangerous region, sensors for monitoring the concentration of radon are installed in the deep coal and rock mass positions in the two detection holes, the sensors acquire the concentration of radon from rock masses under the surrounding rock pressure change, radon concentration measurement value data returned back through the sensors arranged in the two detection holes and used for monitoring the concentration of radon are recorded a time every 10 min to 15 min, the monitored data within an hour are averaged, average data serve as monitoring sample data, the data are monitored continuously till a work face is completely exploited, and according to the monitored concentration measurement value data change trend of radon released from the rock masses in the two detection holes, the dangerousness probability of rock burst occurrence is judged. The problems that information interference, high investment cost and the like existing in common mine well rock burst dangerousness monitoring are solved, and the predicting method is simple, practical, low in equipment cost and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to a method for monitoring the risk of rock burst in underground mining of coal mines. Background technique [0002] Rock burst is a world-class scientific problem in the field of coal mine underground engineering and rock mechanics. Shallow coal resources are increasingly depleted, and it has become an inevitable trend to gradually turn to deep mining. In deep mining, the dynamic and environmental conditions of coal and rock mass become more complex, and mine pressure appears more frequently. There will be more mine coal seams that are at risk of rock burst, and the destructive intensity of deep rock burst will also be greater. . [0003] The effective control of rock burst is the premise of safe mining, and the accurate monitoring of the risk of rock burst is the primary task of prevention and control work. At present, the monitoring of rockburst risk includes r...

AI Technical Summary

Problems solved by technology

With the increase of mining depth, two or more monitoring measures need to be taken in the specific implementation process, which has high investment cost, difficult operation, and some measures are inconvenient for on-site construction, and are seriously affected by the interference of surrounding environmental factors (such as blasting , drilling, rail transportation, etc.), there are serious errors in the monitoring results, and the prediction accuracy is low, resulting in poor effect of crisis relief implementation

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