Rock stratum displacement monitoring device and method for three-dimensional similar simulation experiment
A similar simulation experiment and displacement monitoring technology, applied in the direction of measuring devices, electrical devices, instruments, etc., can solve the problems of measuring devices interfering with the model, unable to obtain the horizontal displacement of simulated rock formations, etc., to solve the problem of rock displacement monitoring and the degree of automation And the effect of high measurement accuracy and continuous observation
Pending Publication Date: 2022-02-18
SHENHUA SHENDONG COAL GRP +2
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This method also has the problem of interference of the measuring device to the model, and can only monitor the up and down movement of the simulated rock formation, but cannot obtain the horizontal displacement of the simulated rock formation
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[0075] The present invention will be further described below with the stratum displacement monitoring in the three-dimensional similar simulation experiment as an example:
[0076] 1. Determine the layout scheme of the transmitting antenna and receiving coil
[0077] The size of the three-dimensional similar simulation experiment platform selected for this experiment is 2m×2m×2m, and the simulated rock formations are divided into sandy mudstone, coal seam, mudstone, sandy mudstone, and mudstone from bottom to top according to the drilling holes of the working face and relevant rock formation data. , fine sandstone, limestone, and mudstone have a total of 8 layers. Mica slices are sprinkled between each rock layer to simulate the layering of rock layers. The specific material ratio of each rock layer is determined according to the test results of rock samples. According to the experiment plan, two key rock formations above the coal seam were selected for monitoring. A total of ...
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The invention provides a rock stratum displacement monitoring device and method for a three-dimensional similar simulation experiment, wherein the device comprises a three-dimensional similar simulation experiment platform, transmitting antennas, receiving coils and a signal extraction device; the three-dimensional similar simulation experiment platform is used for laying a simulated rock stratum; the transmitting antennas are arranged on a rock stratum to be monitored in a matrix form; the receiving coils are arranged on the side face of the three-dimensional similar simulation experiment platform in a matrix mode and generate induced electromotive force under the influence of electromagnetic induction; and the signal extraction device is used for collecting signals sent by the receiving coils and transmitting the signals to the data processing system for data processing. According to the invention, the displacement amount and the displacement direction of the rock stratum in the model in the three-dimensional similar simulation experiment process can be measured, the specific rock stratum can be monitored in an emphasized manner, the influence on the model is small, the experiment result cannot be interfered, the automation degree and the measurement precision are high, continuous observation can be realized, and required data and images can be directly output, so that the problem of rock stratum displacement monitoring in a three-dimensional similar simulation experiment is effectively solved.
Description
technical field [0001] The invention relates to the technical field of coal mining, in particular to a rock formation displacement monitoring device and method for a three-dimensional similar simulation experiment. Background technique [0002] After the coal is extracted, the original balance of the rock above the goaf is destroyed, and the stress is redistributed, which in turn causes geological disasters such as the movement of the mine rock mass and surface subsidence. In order to study the law of rock movement and deformation, and to formulate appropriate mining loss reduction measures, it is necessary to monitor the movement and deformation of the rock above the goaf. However, in the actual production work, the range of mining rock formations is very large, and it is difficult to carry out comprehensive and effective monitoring by existing means. Therefore, the actual mining process can only be simulated through a model with a certain scale down, and the actual mining ...
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IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 张凯郭俊廷李井峰杨明浩
Owner SHENHUA SHENDONG COAL GRP
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