Gas extraction and coal spontaneous combustion coupling disaster-causing experimental simulation apparatus and method

Abstract

The invention discloses a gas extraction and coal spontaneous combustion coupling disaster-causing experimental simulation apparatus and method in a coal mine. The gas extraction and coal spontaneous combustion coupling disaster-causing experimental simulation apparatus comprises a pressure-resistant insulation seal tank, a gas extraction and filling apparatus and a monitoring apparatus; the gas extraction and filling apparatus comprises a vacuum gas extraction pump and a constant-pressure gas filling apparatus, the constant-pressure gas filling apparatus comprises a gas filling bottle with a pressure gauge, a decompression valve, an explosion-proof gas washing box, a gas drying box, a constant-temperature heating box, a pressure stabilizing valve, a pressure gauge, a flow gauge and two gas switch valves; the monitoring apparatus comprises a plurality of temperature sensors, a temperature analysis instrument and a gas chromatograph; the pressure-resistant insulation seal tank is internally provided with a coal sample, and the gas extraction and filling apparatus enables the vacuum gas extraction pump and the constant-pressure gas filling apparatus to be respectively connected with the coal sample in the heat-resistant insulation seal tank through an h-shaped steel pipe; and the monitoring apparatus is connected with the pressure-resistant insulation seal tank. By adopting the gas extraction and coal spontaneous combustion coupling disaster-causing experimental simulation apparatus and method, a gas extraction and coal spontaneous combustion coupling disaster causing process in the underground gas extraction process of a coal mine can be really and accurately simulated.

Description

technical field [0001] The invention relates to an experimental simulation device for coupling disasters caused by gas drainage and coal spontaneous combustion, in particular to an experimental simulation device and method for coupling disasters caused by gas drainage and coal spontaneous combustion in underground coal mines. Background technique [0002] Gas is the main cause of frequent and serious coal mine accidents in my country. With the increase of coal mine depth and single well output, the amount of gas gushing out is increasing. important problem. At present, gas drainage is one of the most effective measures to solve gas disasters. In the process of gas drainage, with the increase of borehole gas leakage and the decrease of coal seam gas pressure, the risk of spontaneous combustion of coal seams with spontaneous combustion tendency gradually increases. When the broken coal around the gas drilling hole accumulates enough heat and the oxygen concentration is suitab...

AI Technical Summary

Problems solved by technology

There are many ideal assumptions in theoretical analysis and numerical simulation analysis, which are too different from the actual occurrence state of underground coal seams; directly going to coal mines to conduct experiments is not only costly and dangerous, but also the gas pressure, coal quality, and stress of each coal mine. The state is also single, and the probability of chance is too high

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