System and method for simulating floor water inrush in coal seam mining above confined water

Abstract

The invention discloses a system and method for simulating water inrush from the mining floor of a coal seam above pressurized water. The system is composed of a two-dimensional similar simulation experiment device, a loading device, a lifting guide device and a data acquisition device. The device includes a test bench, and the lifting guide device includes a capsule body, a guard plate groove, a U-shaped groove and a guide tube located on the upper surface of the capsule body. The U-shaped groove is located on the bottom plate of the test bench, and the capsule body is fixed in the U-shaped groove. The plate groove is located on both sides of the bottom plate, and there are several small holes on the inner wall of the guard plate groove, and several branch pipes are evenly spaced in the vertical direction of the riser pipe. When the model is laid, the branch pipes are located on the outside of the model . The invention realizes the monitoring of the formation process of the water inrush channel and the position of the pressurized water leading up in coal seam mining floor above the pressurized water through the cooperation of the capsule body and the riser tube, and has a certain effect on simulating the water inrush from the floor of the coal seam above the pressurized water mining guiding significance.

Description

technical field [0001] The invention relates to the field of coal mine monitoring equipment, in particular to a system and method for simulating water inrush from a coal seam mining floor above pressurized water. Background technique [0002] Because the coal seam floor water-resisting layer is in an extremely complex geological environment such as high pressure, strong seepage, and multiple structures, there are various factors that induce floor water inrush. Under the influence of coal seam mining, it is very important to monitor and prevent the floor water pressure changes in time to prevent floor water inrush from damage to the goaf. [0003] In the prior art, the similar simulation test system of high water pressure floor water inrush in deep mining and the physical simulation test system of floor water inrush hazard are mainly used to obtain the influence of confined water on each rock layer of the floor during coal seam mining and the pressure change of the confined w...

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Problems solved by technology

[0004] At present, the floor water inrush simulation of coal seam mining above confined water has the following particularities: 1. The development of internal cracks in the rock formation cannot be directly reflected outside the model; 2. The overall lateral invariance of the confined water

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