Gas three-dimensional extraction and goaf spontaneous combustion ignition coupling test system

Abstract

The invention discloses a gas three-dimensional extraction and goaf spontaneous combustion ignition coupling test system comprising a ventilation system, a gas system, a three-dimensional gas extraction system, a data measurement and acquisition system and a control system and further comprising a base, a frame body, a top cover, a warming system, a triaxial stress loading system and a coal rock excavation system; the frame body is fixedly arranged on the base, the top cover can cover the frame body, the heating system enables a test sample piece placed in a test cavity defined by the frame body and the top cover to be kept at a test temperature, the triaxial stress loading system is used for loading XYZ-direction stress on the test sample piece, and the coal rock excavation system is usedfor mining a coal bed in the test sample piece to form a goaf. By adoption of the system, the goaf and gas three-dimensional extraction of the actual mine can be simulated more truly, and more accurate and real data is provided for the subsequent coupling relation between gas three-dimensional extraction and spontaneous combustion ignition of the goaf.

Description

technical field [0001] The invention relates to a coal mining simulation technology, in particular to a coupling test system for gas three-dimensional drainage and goaf spontaneous combustion. Background technique [0002] Gas drainage is the main technology for mine gas prevention and control, especially coal and gas outburst prevention, and gas is also a clean energy. In recent years, mines across the country have vigorously implemented coal and gas mining to strengthen gas drainage. Affected by factors such as excessively large mining fissure field and unreasonable extraction technology, gas drainage changes the air leakage of the working face, which easily causes spontaneous combustion of the coal seam. The symbiosis of coal seam gas and spontaneous combustion makes disaster prevention and control complicated and difficult, and similar accidents have occurred many times. With the increase of mining depth and mining intensity, this situation is becoming increasingly sev...

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Problems solved by technology

[0003] CN103775120A discloses a gas drainage and coal spontaneous combustion simulation experiment device in goafs prone to spontaneous combustion and high gas coal seams, which includes a U-shaped working face coal mining system, a ventilation system, a gas system, a drainage system, and a data test collection system. Simulate the relationship between gas drainage and coal spontaneous combustion in the goaf of highly gassy coal seams prone to spontaneous combustion, but it only considers the influence of ventilation on goaf gas drainage and coal spontaneous combustion, and the obtained gob gas drainage and coal spontaneous combustion The relationship between them cannot truly reflect the relationship between gas drainage in goafs and coal spontaneous combustion in actual mines

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