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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

Inactive Publication Date: 2017-08-04
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology

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.

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the embodiment of the patent of the present invention is described in detail: this embodiment is implemented under the premise of the technical solution of the present invention, has provided detailed implementation and specific operation process, but protection scope of the present invention is not limited to Examples described below.

[0022] The invention comprises a static load pressure device for applying static load in three directions of X, Y and Z, a dynamic load device for applying dynamic load in X direction, and an instant unloading drop device. Wherein, the static load pressure device includes an XZ-axis cylinder block 1, a Z-axis upper oil cylinder 2 installed on the XZ-axis oil cylinder block 1, and a Z-axis upper load sensor 3 fixed on the XZ-axis oil cylinder block 1; The dynamic load device in the X direction consists of the X-axis right cylinder 4, the transmission rod 6 installed on the X-axis right cyli...

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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.

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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Application Information

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IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0048G01N2203/0256G01N2203/0676
Inventor 窦林名巩思园青克尔何江丁国龙杨彬郑文桐张敏冯龙飞蔡武
Owner CHINA UNIV OF MINING & TECH
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