Hopkinson pressure bar-based true triaxial dynamic-static coupling loading and unloading test system

A technology of Hopkinson compression bar and test system, applied in the field of true three-axis dynamic and static combined loading and unloading test system, can solve the problems that the environmental characteristics of coal-rock dynamic disasters cannot be truly simulated, hinder the breakthrough of coal-rock dynamic disaster theory, and achieve improvement Theoretical research level and equipment level, improving effectiveness and pertinence effect
CN107014689AInactive Publication Date: 2017-08-04CHINA UNIV OF MINING & TECH +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CHINA UNIV OF MINING & TECH
Publication Date
2017-08-04
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an experimental device for static-dynamic coupling loading of coal and rock samples and particularly relates to a Hopkinson pressure bar-based true triaxial dynamic-static coupling loading and unloading test system. The Hopkinson pressure bar-based true triaxial dynamic-static coupling loading and unloading test system is suitable for mine impact power disaster mechanism research and laboratory simulation and reconstruction, dynamic, controllable and different dynamic-static coupling loading of the coal and rock samples can be achieved, multiple stress-wave loading modes of a coal and rock material can be simulated, and the impact phenomenon of field coal and rock mass can reappear through the true triaxial characteristic of the system. The Hopkinson pressure bar-based true triaxial dynamic-static coupling loading and unloading test system mainly comprises a static loading pressure device for applying static loads to three directions, a dynamic loading device for applying dynamic loads to an X direction and an instant unloading drop device. A mechanism that coal mass induces impact failure under the action of stress waves such as a mine earthquake is researched through combination of an axial static-dynamic device and confining pressure, a whole rock burst generation model under the static-dynamic loading condition is built, the resultant action of various influence factors is researched and a theoretical basis is provided for mine earthquake-induced impact and control.
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Description

technical field

[0001] The invention relates to the technical field of dynamic failure tests of coal and rock, in particular to a true three-axis dynamic and static combined loading and unloading test system based on a Hopkinson pressure bar. Background technique

[0002] With the increase of mine mining depth year by year, deep mining-induced disasters represented by coal mine earthquakes are more sudden, showing obvious nonlinear dynamic characteristics, and can lead to rock bursts, coal and gas outbursts, and water inrush in severe cases and other mine disasters. At present, there are domestic inventions about true three-axis loading and unloading and false three-axis dynamic and static combined loading, but none of them can truly simulate the environmental characteristics of coal-rock dynamic disasters, which hinders theoretical breakthroughs in the study of coal-rock dynamic disasters. For this reason, the present invention has developed a true three-axis dynamic and s...

Claims

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