A physical simulation test system and method for the impact of mine earthquakes on coal mine underground reservoirs

Abstract

The invention discloses a physical simulation testing system and method for influences of a mine earthquake on a coal mine underground reservoir, and belongs to the technical field of mining engineering and water conservancy project cross-disciplines. The physical simulation testing method includes the steps of firstly, fixing a model box on a vibration table (2), placing model stratum materials in the model box to simulate stratums, making model coal pillars, and placing the model coal pillars into an air cushion simulation coal seam goaf area; arranging acceleration sensors, miniature pressure meters, stay wire type displacement meters and dial indicator displacement meters; measuring initial values of the sensors under the static effect, then simulating a goaf coal seam in a segmented mode, and recording data under the static effect; inputting several typical earthquake waves with different peak accelerations into the vibration table (2), and respectively recording data of the miniature pressure meters, the stay wire type displacement meters, the dial indicator displacement meters and the acceleration sensors after vibration is completed. The model profile acceleration change rule, the model surface displacement subsidence rule, the model coal seam top plate displacement change rule and the model coal pillar stress change rule after vibration are observed, and changes of the underground reservoir capacity are researched.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of mining engineering and water conservancy engineering, and is mainly used for verifying the feasibility test research of coal mine goaf as an underground reservoir. Background technique [0002] At present, the experiments on underground reservoirs mainly focus on the monitoring of displacement deformation and stress change in underground mined-out areas, regulation and storage of underground reservoirs, monitoring of leakage, and stability of water structures. Most of the methods used in the test are two-dimensional static simulation method, and seldom use three-dimensional dynamic simulation test. In the 3D model test, the model box is made of custom-made steel plates, which can meet the requirements of building the model, but it is not convenient to observe the deformation law of the model, and the displacement monitoring of the model also has defects such as low precision. Therefore,...

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Problems solved by technology

In the 3D model test, the model box is made of custom-made steel plates, which can meet the requirements of building the model, but it is not convenient to observe the deformation law of the model, and the displacement monitoring of the model also has defects such as low precision

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