Method for monitoring relative gravity of surface subsidence in coal mining process
A mining process and surface subsidence technology, which is applied in geophysical measurement, measuring devices, and gravitational field measurement, can solve the problems of reduced accuracy, time-consuming and laborious, and unsuitable for coal mine subsidence monitoring, achieving high accuracy and high monitoring results Effect
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[0081] Such as figure 1 As shown, taking a coal mine as an example, there is a gravity observation reference point K in the mining area, and the gravity value of this point remains unchanged. Such as figure 1 As shown, the working face is 1000 meters long in strike direction and 200 meters wide in inclination.
[0082] For convenience, figure 1 Only the layout of the monitoring points along the strike main section and the inclined main section of the coal seam is given in the paper. Such as figure 1 As shown, there are 47 gravity monitoring points in the figure.
[0083] Taking the relative gravity monitoring in the previous two phases as an example, use a relative gravimeter to monitor the gravity monitoring point once before the mining of the working face. Perform a relative gravity monitor.
[0084] The second step is to calculate the gravity change value of the two adjacent monitoring points (see Table 1 below for details)
[0085] Table 1: The gravity change value ...
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