Hopkinson impact experiment device and method for coal containing methane

Abstract

The invention discloses a Hopkinson impact experiment device and method for coal containing methane. The device comprises a confining cylinder body, an oil-resistant rubber sleeve, an exhaust hole, apressure-bearing fixing block with an air flowing slot, an air inflation pipe, a pressure gage, a high pressure oil pipe and a pressure gage; the upper half part of the pressure-bearing fixing block with the air flowing slot is connected with the air inflation pipe; the pressure-bearing fixing block is wrapped in the oil-resistant rubber sleeve; the oil-resistant rubber sleeve is connected with the inner wall of the confining cylinder body; the high pressure oil pipe and the pressure gage are connected with the lower side of the confining cylinder body. The device is connected with a Hopkinsonpressing rod, pressure oil with certain pressure is injected into the confining cylinder body, gas is injected into an area wrapped by the oil-resistant rubber sleeve, and after the gas is completelyadsorbed by a sample, an impact experiment is started. According to the device and method provided by the invention, researches on the influence of confining pressure on the sample and the influenceof the gas contained by the coal on the sample are simultaneously achieved; the device is simple in structure, reasonable in design and convenient to operate, can improve the success rate of the experiment, and has the relatively strong practicability.

Description

technical field [0001] The invention belongs to the technical field of impact loading experiments of gas adsorption and desorption and material dynamic mechanical properties, and in particular relates to a Hopkinson impact experiment device and method for gas-containing coal. Background technique [0002] With the urgent need of high strain rate dynamic mechanical properties in underground engineering under stress state, the research on the dynamic mechanical properties of materials has attracted more and more attention. A series of impact loading devices dedicated to testing the dynamic mechanical properties of materials have been proposed. The Hopkinson compression bar has become the most widely used experimental device for high-strain mechanical properties of materials. Among them, the split Hopkinson compression bar has been widely used because of its simple structure and low operating cost. The separated Hopkinson rod is an experimental device for studying the dynamic m...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of research that can solve the problem that experiment sample is subjected to radial load (confining pressure) in the Hopkinson compression bar experiment, can solve again the gas in the coal in the sample that contains coal has the effect on sample mechanics. A Hopkinson Impact Test Apparatus and Method for Gassy Coals for the Study of Performance Effects

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