Simulation experimental device for coupling effects of solid-liquid-gas three phase media in coal mine stope

Abstract

The invention discloses a simulation experimental device for the coupling effects of solid-liquid-gas three phase media in a coal mine stope. The device comprises a pedestal, a main body frame, side guard plates, a mining assembly, a simulation material layer and a monitoring instrument. With a framed structure, the main body frame is provided with a filling hole on the top, with the bottom connected to the pedestal through a bearing. The side guard plates, made of synthetic glass, are mounted on the front and back side faces of the main body frame to serve as transparent observation windows on the front and back sides. The mining assembly includes a support model in the mining face and a blast pipe and a return air pipe of a ventilation unit. With accurate monitoring results and integrated monitoring means, the device makes fully use of the systematic advantages to conduct timely, field and scientific monitoring and carry out precise prediction, thus providing reliable theoretical basis and guidance for the design and production practice.

Description

technical field [0001] The invention relates to a coal mine stope solid-liquid-gas three-phase medium coupling simulation experiment device, which involves solid mechanics, seepage mechanics, structural geology, geophysics, rock mechanics, underground engineering, petroleum engineering, and environmental engineering. - The influence of liquid-gas" three-phase medium coupling effect. Background technique [0002] In the physical simulation test, choosing the appropriate model material is one of the key links in the quantitative simulation. According to the similarity theory of simulated rocks, that is, the similarity criteria and properties that simulated rock materials should follow in the multi-phase coupling state, the materials suitable for similar model tests in underground engineering must have the characteristics of large volume, low strength and stable performance. . For research topics related to the "solid-liquid-gas" three-phase, such as mining under the conditio...

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Problems solved by technology

Solid-state simulation tests usually mainly use simulation materials such as sand, gypsum, and large white powder, but these materials are easy to disintegrate when exposed to water. The simulation test must first develop non-hydrophilic simulation materials, that is, the model materials need to choose non-hydrophilic materials for mold making , the gas-bearing rock formation also needs to be molded with breathable and impermeable materials, which increases the difficulty of mold making

Moreover, many simulation results cannot well reflect the actual situation of diagenetic geological bodies in the engineering state, and some qualitative errors often occur, but there are few experimental studies

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