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A device for measuring the permeability of coal body affected by mining and its application method

A measuring device and a mining impact technology, which are applied to the measuring device for the permeability of coal body affected by mining and its application field, can solve the problems such as failure to fully reflect the gas permeability, and achieve reasonable structure, accurate measurement and easy operation. Effect

Inactive Publication Date: 2020-09-08
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the existing studies, the gas permeability of coal is usually considered in the process of coal triaxial compression test, which only considers the gas permeability when the coal unit is subjected to three-dimensional stress, but in the actual mining process, the gas is in the A large-scale coal infiltration in front of the stope affected by mining, the obtained results cannot fully reflect the gas permeability in the mining coal, so there is an urgent need for a mining-affected coal permeability measurement device and its use method

Method used

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  • A device for measuring the permeability of coal body affected by mining and its application method
  • A device for measuring the permeability of coal body affected by mining and its application method
  • A device for measuring the permeability of coal body affected by mining and its application method

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Embodiment 1

[0036] A coal permeability measurement device affected by mining, its composition includes: an experimental platform, a pressure sensor, a computer, a data acquisition instrument, the experimental platform 1 includes a foundation base 2 and a cast iron frame 3, and the base base 2 The two sides of the base are cast iron frames 3, the upper end of the base base 2 is a cast iron top beam 4, the back side bottom of the cast iron frame 3 is provided with a cast iron beam 5, and the base base 2 is connected to the cast iron frame 3 by bolts, The cast iron frame 3 is connected to the cast iron top beam 4 by bolts, the cast iron frame 3 is a thickened plate, and the base base 2 is a thick steel plate fixed on the concrete foundation in the form of bolts, and the top surface of the base base 2 is set The coal sample loading chamber 6 has threaded holes on the foundation base 2, the bottom plate of the coal body loading chamber 6 is connected with the threaded holes on the foundation ba...

Embodiment 2

[0045] In the embodiment of a coal permeability measurement device affected by mining, the vertical loading connecting rod 10, servo loading device I13, pressure plate I9-1, and oil separator 23 constitute a vertical stress loading system 12.

Embodiment 3

[0047] In the mining-affected coal permeability measurement device described in Example 1, the horizontal loading connecting rod 16, servo loading device II 17, and pressure plate II 9-2 oil separator 23 form a horizontal stress loading system 15.

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Abstract

The invention discloses a device for measuring a mining influenced coal permeability and a using method thereof. In the mining process of a high gas coal seam, gas in coal in the front of a stope permeates into a stope space by fractures under the influence of mining, and in order to measure a gas permeability condition in the mined coal, the device for measuring the mining influenced coal permeability is in urgent need. The left side of a detachable plug I is connected with a gas pipeline I; the left side of the gas pipeline I is connected with a gas storage tank; a gas pressure stabilizer I, a gas pressure sensor I and a gas flow meter I are sequentially arranged on the right side of the gas pipeline I. Experiments for measuring the gas permeability in the coal under conditions of different mining stresses, different mining heights, different gas concentrations and different gas pressures can be developed, and a gas permeability change rule of the coal in the front of the underground stope under the influence of mining is researched. The invention is used for the device and method for measuring the permeability of the coal under the influence of mining.

Description

technical field [0001] The invention relates to a coal body permeability measurement device affected by mining and its application method. Background technique [0002] The process of mining coal resources will be accompanied by the occurrence of various disasters and accidents, such as gas explosions, coal and gas outbursts, and so on. In order to effectively prevent the occurrence of gas accidents, it is very important to effectively drain the areas where gas is prone to gushing and enrichment during coal mining. Coal seams in my country are generally characterized by low permeability. Gas drainage can not only greatly reduce the gas content of coal seams, reduce the probability of gas dynamic disasters, but also use gas as a clean energy. In the process of coal seam mining, the impact of mining on the coal body in front of the stope may easily lead to the development and penetration of coal bedding fissures, coal deformation and even destruction, which affects gas seepag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 肖福坤蒋元男刘刚陈刚金珠鹏
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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