Large simulation test counter-force rack for multi field coupling coal mine dynamic disaster

Abstract

The invention discloses a large simulation test counter-force rack for a multi field coupling coal mine dynamic disaster, and the large simulation test counter-force rack comprises a bottom plate, wherein the bottom plate is provided with a plurality of bolt connection holes; the rear part of the bottom plate is provided with a vertical plate; the vertical plate is provided with a first opening; the rear part of the vertical plate is fixedly provided with a door frame; the door frame is provided with a second opening opposite to the first opening; the second opening of the door frame is provided with a left sliding door and a right sliding door which can plug the second opening; the left sliding door is connected with a left cylinder; the right sliding door is connected with a right cylinder; a first roller is respectively arranged between the upper part of the front door surfaces of the left sliding door and the right sliding door and the door frame and between the lower part of the front door surfaces and the door frame; a second roller is respectively arranged between the upper side surfaces of the left sliding door and the right sliding door and the door frame and between the lower side surfaces of the left sliding door and the right sliding door and the door frame; and the opposite surfaces of the left sliding door and the right sliding door are respectively provided with a left sealing plate and a right sealing plate. According to the large simulation test counter-force rack, the coal mine dynamic disaster process can be accurately simulated so as to more scientifically research a coal mine dynamic disaster forming mechanism.

Description

technical field [0001] The invention relates to a test reaction force frame for simulating the coal mine dynamic disaster process under the mechanism of multi-field coupling. Background technique [0002] Coal mine dynamic disaster is the coal or rock mass with a large amount of elastic energy accumulated in a high-stress state in the process of coal mining, which suddenly breaks, falls or is thrown under certain conditions, causing the energy to be released suddenly, presenting sound, vibration and Extremely complex dynamic phenomena with obvious dynamic effects such as air waves, which mainly have three main forms: coal and gas outburst, rock burst and large-scale roof fall, which seriously threaten the safe production of coal mines and the safety of miners' lives. The occurrence of dynamic disasters is difficult to predict and grasp, and its internal pathways and mechanisms have not been fully understood by human beings. Moreover, with the increasing depth of coal mine mi...

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Problems solved by technology

[0003] In the prior art, the test devices for simulating coal mine dynamic disasters mainly have the following problems: (1) The size of the model used is small, and the development process of simulating dynamic disasters has a certain space limitation; (2) The degree of automation of device installation is low ; (3) The sealing of the device is not high, the simulated gas pressure is not high, and the pressure of the test simulated gas cannot be close to the site situation; (4) The opening speed of the protrusion baffle is slow or there is a certain delay, which affects to a certain extent The time and intensity of coal and gas outburst are not known, so there are still differences between the actual simulation situation and the real underground coal and gas outburst; (5) The simulated in-situ stress cannot completely simulate the local stress concentration of the mining face caused by mining activities; (6) The coal body parameters inside the prominent mold are not collected enough. In most cases, only the temperature and gas pressure are collected, and the collection point is relatively single. It is impossible to analyze and study the stress and temperature development law inside the coal body before and after the coal mine dynamic disaster.

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