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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

Active Publication Date: 2015-04-22
SHANDONG UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

Among them, GPS can efficiently monitor elevation changes, but requires long enough data records and a dedicated environmental impact correction model to obtain millimeter-level observation accuracy; InSAR provides two-dimensional surface deformation with limited spatial resolution, but the accuracy is usually It is reduced due to the spatial correction of SAR images, terrain effects and atmospheric effects; precision leveling is time-consuming and laborious to obtain high-precision leveling data, especially when the area is large; and 3D laser scanning technology has high measurement accuracy and Extremely high data collection rate, but it is necessary to consider the visibility of the field of view when collecting data. In addition, due to the discontinuity of ground laser 3D scanning sampling, the set deformation monitoring points may not become the sampling points of the laser scanner. point, so it is not suitable for coal mine subsidence monitoring

Method used

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  • Method for monitoring relative gravity of surface subsidence in coal mining process
  • Method for monitoring relative gravity of surface subsidence in coal mining process
  • Method for monitoring relative gravity of surface subsidence in coal mining process

Examples

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Embodiment 1

[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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Abstract

The invention discloses a method for monitoring relative gravity of surface subsidence in the coal mining process. The physical geodesy measuring theory and the law of universal gravitation are adopted as theoretical bases, a gravity observation datum point is selected in a mine lot, a feature point is selected in the surface subsidence area or main coal seam section of coal mining and adopted as a monitoring point, and relative gravity between the monitoring point and the gravity observation datum point is monitored by stage according to the progress of a coal mining work face through a relative gravimeter; then, the gravity change value of the monitoring point between two adjacent stages is calculated, and the surface subsidence value of the monitoring point is calculated. Compared with the prior art, the method has the advantages of being simple in monitoring essential data collecting instrument, high in measuring precision, accurate and reliable in monitoring result, efficient, easy and convenient to operate and the like. According to the method, values with geometrical significance can be provided, and certain physical mechanisms can be reflected, such as migration of underground materials and changing of surface elevation.

Description

technical field [0001] The invention relates to a method for monitoring surface subsidence during coal mining, in particular to a method for monitoring relative gravity of surface subsidence during coal mining. Background technique [0002] The surface subsidence that may be caused during coal mining will have a serious impact on the ecological environment of the mining area. Coal mining subsidence monitoring is a necessary task in the process of coal mining. The completion of this task can not only reveal the basic law of coal mine subsidence, but also can be used to judge the degree of impact of mining on buildings and structures, and timely repair the buildings. , reinforcement, relocation, or on-site reconstruction, and has great theoretical and practical significance for promoting mine safety and normal production, and improving economic and technological benefits. [0003] How to monitor the surface subsidence caused by coal mines in a timely and efficient manner requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/00G01C5/00
Inventor 郭金运于红娟孔巧丽刘新刘智敏
Owner SHANDONG UNIV OF SCI & TECH
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