Method for monitoring rock burst dangerousness in coal underground mining process
A technology of rock burst and underground mining, which is applied in surveying, mining equipment, mining equipment, etc., can solve the problems of high input cost, inconvenient on-site construction, and error in monitoring results, and achieve safe mining, low equipment cost, and easy operation. Effect
Active Publication Date: 2015-08-12
LIAONING TECHNICAL UNIVERSITY
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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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Embodiment Construction
[0030] The sensor model of the radon gas measurement adopted in the embodiment of the present invention is the FD-3017A type RaA radon detector.
[0031] The technical solution of this embodiment is carried out according to the following steps:
[0032] (1) Arrange detection holes for radon concentration monitoring:
[0033] A complete mining system working face is formed during the underground mining of coal mines, such as figure 1 As shown, it includes the complete upper channel 1, the lower channel 10, the goaf 5, the working face 4 and the coal body 2. According to the stress distribution characteristics of the mining system, a strong rock burst dangerous area 3 is formed, and divided into Compression area CD and unload area AC, BD;
[0034] Two detection holes 6 are arranged on both sides of the strong rock burst dangerous area 3, the first detection hole is arranged at a distance of 60m from the working face, the second detection hole is arranged at a distance of 250m ...
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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...
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Login to View More IPC IPC(8): E21B47/06
CPCE21F17/18
Inventor 兰天伟
Owner LIAONING TECHNICAL UNIVERSITY