Multifunctional physical simulation test system for coal engineering and coal model test method

Abstract

The invention relates to a multifunctional physical simulation test system for coal engineering. The system comprises a test chamber, a model forming subsystem, a hydraulic loading control subsystem, a test subsystem and a gas pumping and injecting subsystem, wherein the test chamber comprises a loading frame and a counterforce cover detachably connected to one end of the loading frame; the loading frame and the counterforce cover are coaxially mounted on a base; a guide rail is arranged on the base in an axial direction of the loading frame; and support seats capable of sliding along the guide rail are mounted on the guide rail and are mounted at bottoms of the loading frame and the counterforce cover respectively; a track conveying subsystem for conveying models is detachably connected between the model forming subsystem and the test chamber. The invention further provides a coal model test method. According to the multifunctional physical simulation test system for coal engineering and the coal model test method, operation such as drilling, joint forming, fracturing, coal and gas outburst, excavation and support of underground construction and the like under actions of crustal stress, gas pressure and comprehensive multiple factors can be simulated, and an experimental verification means is provided for coal and gas outburst related occurrence mechanism, prediction and control.

Description

technical field [0001] The invention relates to a geomechanical model test loading device, in particular to a multifunctional physical simulation test system and method for coal and rock engineering. Background technique [0002] With the rapid development of economic construction, the country's demand for energy is increasing, and the fossil energy in the shallow underground is becoming less and less. The development of deep underground has become a common trend in geotechnical engineering construction and development worldwide. [0003] At present, domestic and foreign studies on the mechanism, prediction and control of coal and gas outburst have not yet formed a complete theoretical system. Because the constitutive relationship of coal and rock materials is difficult to accurately describe, the results of numerical simulation methods have not been widely recognized by the industry, nor can they directly guide the actual production of the industry, and can only be used as ...

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Problems solved by technology

[0006] However, as the depth of coal mining increases, the engineering problems that arise become more complex, such as the gas adsorption and desorption process and gas flow law in the coal seam under the combined action of high geostress and high gas pressure, the relationship between gas permeability and effective stress, temperature, etc. On the other hand, the requirements for the level of scientific research design and calculation accuracy are getting higher and higher. The existing test equipment is in terms of functions, loading methods, and the range and uniformity of the strain field formed in the model. Can no longer meet the needs of engineering practice

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