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Pressure-bearing broken residual coal permeability evolution and spontaneous combustion characteristic testing device

A characteristic test and permeability technology, which is applied in the field of pressure-bearing broken coal permeability evolution and spontaneous combustion characteristics test device, can solve the problems that stress loading cannot be realized

Inactive Publication Date: 2016-01-20
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to adopt the method of axial loading stress and temperature control to solve the technical status quo that the existing traditional coal spontaneous combustion test equipment cannot realize stress loading, and to simulate the void ratio of coal left in the goaf under different stress states and surrounding rock temperatures , permeability test device for spontaneous combustion characteristics of pressure-bearing broken coal permeability evolution

Method used

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  • Pressure-bearing broken residual coal permeability evolution and spontaneous combustion characteristic testing device

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Experimental program
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Effect test

Embodiment 1

[0033] A device for testing the permeability evolution and spontaneous combustion characteristics of pressure-bearing broken coal, comprising a heating temperature control device 12, a coal sample chamber 14, a first sensor 15, a second sensor 16, the coal sample chamber 14 includes a coal sample chamber cavity Body 11, piston pressure head 10 and lower plug 13, said coal sample chamber cavity 11 is fixed on the support frame of the pressure-bearing broken coal permeability evolution and spontaneous combustion characteristics test device, the coal sample chamber cavity 11 is cylindrical Type hollow structure, the coal sample is loaded into the coal sample chamber cavity 11, the upper part of the coal sample chamber cavity 11 is provided with a piston pressure head 10, and the air inlet inside the piston pressure head 10 is provided with a pipeline connected to the pressure test system. When the gas is oxygen, the oxygen enters into the coal sample chamber cavity 11 through the p...

Embodiment 2

[0035] A device for testing the permeability evolution and spontaneous combustion characteristics of pressure-bearing broken coal, comprising a heating temperature control device 12, a coal sample chamber 14, a first sensor 15, a second sensor 16, the coal sample chamber 14 includes a coal sample chamber cavity Body 11, piston pressure head 10 and lower plug 13, said coal sample chamber cavity 11 is fixed on the support frame of the pressure-bearing broken coal permeability evolution and spontaneous combustion characteristics test device, the coal sample chamber cavity 11 is cylindrical Type hollow structure, the coal sample is loaded into the coal sample chamber cavity 11, the upper part of the coal sample chamber cavity 11 is provided with a piston pressure head 10, and the air inlet inside the piston pressure head 10 is provided with a pipeline connected to the pressure test system. When the gas is nitrogen, the nitrogen enters the coal sample chamber cavity 11 through the pr...

Embodiment 3

[0037] This embodiment is basically the same as Embodiment 1, except that the gas is carbon dioxide.

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Abstract

The invention relates to a pressure-bearing broken residual coal permeability evolution and spontaneous combustion characteristic testing device. A coal sampling mill comprises a coal sampling mill cavity, a piston pressure head and a lower plug head. The coal sampling mill cavity is fixed to a supporting frame of the pressure-bearing broken residual coal permeability evolution and spontaneous combustion characteristic testing device. The coal sampling mill cavity is of a cylindrical hollow structure. The piston pressure head is arranged at the upper portion of the coal sampling mill cavity. The lower plug head is arranged at the lower portion of the coal sampling mill cavity. A heating temperature control device is arranged on the periphery of the coal sampling mill cavity. A first sensor and a second sensor are arranged inside the coal sampling mill cavity. A pressure control system is arranged on the top of the coal sampling mill cavity. A gas inlet formed inside the piston pressure head is provided with a pipeline to be connected with a pressure testing system. A gas outlet formed inside the lower plug head is provided with a pipeline to be connected with a gas detection unit. Axial loading stress and temperature control are adopted for solving the technical problem that a traditional coal spontaneous combustion testing device cannot achieve stress load.

Description

Technical field [0001] The invention relates to a testing device, in particular to a testing device for the permeability evolution and spontaneous combustion characteristics of crushed coal under pressure. Background technique [0002] The safety situation of coal mines in our country is still severe, with frequent disasters. During the "Twelfth Five-Year Plan" period, among the 759 key coal mines across the country, 54.9% of coal mines have a tendency to spontaneous combustion. According to statistics, mines with spontaneous combustion periods within 3 months accounted for more than 50%. There are nearly 400 fires caused by spontaneous combustion each year. The natural oxidation of coal has caused nearly 4,000 fire hazards. Only in northern China’s coalfield fire areas have burnt more than 4.2 billion tons of coal; currently shallow coal resources are nearly exhausted, and many coal mines have begun deep mining with a mining depth of 800 ~1500m, and 10~20m deepen every year. Wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 褚廷湘晁江坤李品王少坤余明高
Owner HENAN POLYTECHNIC UNIV
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