Real-time dynamic monitoring test device for water regimen of mining working surface and test method

Abstract

The invention discloses a real-time dynamic monitoring test device for water regimen of a mining working surface. The test device comprises a square transparent container, wherein symmetric partition slots are longitudinally formed in corresponding inner side edges of the container, different baffle plates are inserted into the partition slots to combine a closed region, the closed region is filled with a similar working surface rock mass prepared from a similar material, a complete rubber bag, a plurality of electrodes and a plurality of stress sensors are embedded into the similar working surface rock mass, and the rubber bag is connected with an air pipe extending to the outside of the rock mass; the plurality of electrodes are connected to an electric cable through wires, and the electric cable is connected with an electrical instrument outside the similar working surface rock mass; the plurality of stress sensors are connected with a display device outside the similar working surface rock mass through wires; the direct current electrical instrument and the display device are connected with an early warning device. The invention further discloses a test method adopting the test device. According to the test device and the test method, the similar material simulation of the mining working surface can be realized, and the water regimen dynamic change in the working surface mining process can be monitored in real time.

Description

technical field [0001] The invention relates to the field of similar material simulation test devices for working faces, and relates to a similar material test device and a test method for real-time dynamic monitoring of water conditions in mining working faces. Background technique [0002] In recent years, North China type coalfields have faced two major water hazards during the mining process: one is the roof sandstone water under the conditions of large-span and large mining depth represented by Southwest Shandong, and the roof sandstone water has uneven distribution and is difficult to release The key technology to solve the problem of roof sandstone water is to explore and release water in advance; secondly, in the old mining area represented by Feicheng Coalfield, after more than half a century of mining, the mining depth has entered the deep part, and the working face is deeply affected by the pressure of the highly confined aquifer. Danger, especially the threat of ...

AI Technical Summary

Problems solved by technology

Among them, the on-site method includes drilling and geophysical methods. The drilling method can actually reveal the richness of groundwater, but the amount of work is large and the work efficiency is low; the geophysical method can detect the richness of groundwater, but due to the variety of geophysical methods Solubility and downhole complex environment influence, limiting the advantages of geophysical prospecting methods

The indoor simulation method includes numerical simulation and similar material simulation. The numerical simulation can only be simulated for a certain working face, and cannot be promoted in a large area. If real-time dynamic monitoring of the water regime of the working face is carried out, a large amount of capital, manpower and resources will be invested. Material resources, most instruments and equipment cannot be recycled, which wastes manpower and resources, and the working surface is relatively single, which cannot represent universal laws. Therefore, field tests are not feasible

[0004] Chinese patent application 201210038167 uses transient electromagnetic instruments as part of the measuring point network on the working face. The advantages of transient electromagnetic instruments are that they are sensitive to low-resistance bodies and have high detection accuracy; but their disadvantages are that they are greatly affected by the surrounding environment and have a lot of interference, especially in Affected by the "low-resistance interference body" in the mining process, there are problems with data reliability. Not only is the monitoring inaccurate, but it is easy to cause false anomalies and affect the normal mining of the working face; in addition, the patent focuses on monitoring the key areas of the working face. It is just a general talk, and does not involve the key areas formed by the mine pressure damage to the rock formation during the mining process

[0005] Chinese patent application 201310728093 is mainly aimed at preventing the inrush of water and sand bodies in coal mining under the water body and increasing the upper limit of coal seam mining. It is a special case of roof water inrush and does not have the universal significance of real-time dynamic monitoring of water conditions in the working face

[0006] Chinese patent applications 201410529007, 201410529019, and 201510134024. The above three patents are mainly aimed at studying the depth of floor damage in the mining process. The water regime of the working face and the water regime of the working face are two completely different concepts. Therefore, the monitoring of the damage depth of the bottom plate cannot be regarded as the real-time monitoring of the water regime of the working face

The public water regime monitoring of the working face, the technical scheme of this method is relatively complicated, and the on-site operation costs a lot

This patent only realizes the monitoring of the hydrogeological conditions of water gushing in the working face, and is powerless to the occurrence state and migration law of the water regime during the mining process of the working face

Images