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Seepage experiment system and method for gas-containing coal under action of impact load

An impact load, experimental system technology, applied in permeability/surface area analysis, suspension and porous material analysis, measurement devices, etc., to achieve the effect of strong practicability, accurate measurement, and enrichment of experimental research techniques and methods

Inactive Publication Date: 2015-08-26
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The previous similar experimental system has not carried out experimental research on the change of seepage characteristics of gas-containing coal before and after impact load is applied

Method used

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  • Seepage experiment system and method for gas-containing coal under action of impact load
  • Seepage experiment system and method for gas-containing coal under action of impact load

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0028] like figure 1 and 2As shown, a gas-containing coal seepage experimental system under the action of impact load, which includes a coal sample fixing device 1, an impact load loading device and a high-pressure gas source device connected to the coal sample fixing device 1, an axial pressure loading device, a confining pressure Loading device, vacuuming device and metering and data acquisition device; the impact load loading device is a separate Hopkinson pressure rod device 21; the high-pressure gas source device is composed of a high-pressure gas tank 2 and a pressure reducing valve 3 connected in sequence , the first valve 7, the first barometer 11 and a three-way valve 15, the other two ends of the three-way valve 15 are respectively connected to the gas inlet 1-6 of the vacuum device and the coal sample fixing device 1 through pipelines; The pressure loading device is composed of an axial pressure oil pump 17, a first pressure regulating valve 5, a second valve 8 and...

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Abstract

The invention discloses a seepage experiment system for gas-containing coal under the action of an impact load. The system comprises a coal sample fixing device, an impact load applying device as well as a high-pressure gas source device, an axial pressure loading device, a confining pressure loading device, a vacuumizing device and a metering and data acquisition device connected with the coal sample fixing device, wherein the impact load applying device is a split Hopkinson pressure bar device. The split Hopkinson pressure bar device is adopted to apply the impact load for simulating rock burst, three-dimensional loaded conditions of coal-rock masses in coal mine can be simulated by applying different axial stresses and radial stresses, and seepage experiment of a coal sample in a three-dimensional stress state under the action of the impact load is successfully carried out, so that the system has relatively important meaning in both theory and practice.

Description

technical field [0001] The invention relates to an experimental system and method for the seepage characteristics of gas-containing coal under the conditions of different axial pressures, different confining pressures, and different impact loads, and is used for simulating and studying the gas-containing coal under the conditions of coal-rock dynamic disasters in coal mines. Seepage characteristics of coal under impact loads. Background technique [0002] Rockburst, also known as rockburst, refers to the destruction of the coal rock mass under high ground stress conditions around the coal mine roadway or mining face by the overlying rock collapse or blasting disturbance, and is further rapidly squeezed by the surrounding rock during the destruction process. The resulting elastic deformation can release huge energy instantaneously and cause damage to the mine dynamic phenomenon. During this process, the mechanical properties of the coal seam will change dramatically, and even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 王登科魏建平刘勇夏玉玲姚邦华付启超彭明王洪磊
Owner HENAN POLYTECHNIC UNIV
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