A method for determining the influence range of mining advance in working face based on microseismic monitoring
A technology of advanced impact and microseismic monitoring, applied in mining equipment, earth square drilling, mining equipment, etc.
Active Publication Date: 2021-08-20
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology
However, there is currently no method for determining the range of advance influence of coal mining face using the microseismic monitoring system.
Method used
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Embodiment 1
[0032] Embodiment 1: as figure 1 As shown, the working face 204 of a certain mine in the Binchang mining area in this embodiment has a strong impact risk. The working face has been mined 1050m, and the impact has occurred. The steps are:
[0033] (1) Use the mine's SOS microseismic monitoring system to monitor more than 8,000 mining seismic signals of more than 2 powers in the working face and adjacent areas during the mining process of the 204 working face, and use known processing methods to determine the natural mine seismic signals after eliminating interference signals The location and energy of the respective mine shock sources;
[0034] (2) First set the data step distance to 50m, select 20 mining stages with a mining distance of 10m in the 204 working face, and use the data determined in step (1) to count the respective advance distribution ranges of mining earthquakes in each mining stage, the maximum The value is 500m in advance, and it is determined that the minin...
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The invention discloses a method for determining the range of advance influence of working face mining based on microseismic monitoring. The mine microseismic monitoring system is used to collect natural mine seismic signals in the mining process of the working face to determine the source position and energy; In the mining stage, the mining earthquake distribution range of each stage is counted to determine the mining earthquake statistical interval; the solid coal area in the mining earthquake statistical interval is divided equally according to a certain interval to form multiple advanced partitions, and the total energy and total amount of mining earthquakes in each advanced partition at each stage are counted. The frequencies are superimposed; take the distance from the midline of the advanced partition to the midline of the mining stage as the abscissa, and the total energy and total frequency of the corresponding advanced partition mine shock as the ordinate, draw the total energy and total frequency change curve of the mine shock; normalize the two curves processing, and on the two normalized curves, determine the mine shock energy and mine shock frequency leading influence range of the working face, and select the maximum value of the abscissa within the two ranges as the working face mining leading influence range.
Description
technical field [0001] The invention relates to a method for determining the advance influence range of mining in a working face based on microseismic monitoring, and belongs to the technical field of coal mine safety. Background technique [0002] The occurrence conditions of my country's coal resources are complex. In recent years, with the increase of mining depth, the stress environment of the stope has continued to deteriorate, and dynamic disasters such as rock bursts and coal and gas outbursts have occurred frequently, seriously threatening the safe production of mines and the safety of personnel. On-site monitoring and statistical results show that during the mining process of the working face, the roadways within a certain range of the two leading roadways will experience varying degrees of roof subsidence, side heaving and bottom heaving, and dynamic events such as rock bursts and coal and gas outbursts also frequently occur Within a certain range of the coal minin...
Claims
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IPC IPC(8): E21F17/00G01V1/30
CPCE21F17/00G01V1/30
Inventor 周坤友窦林名张金魁巩思园宋士康白金正司雷卢安良
Owner CHINA UNIV OF MINING & TECH