Experiment device for spontaneous combustion characteristic test during coal rock creep process

Abstract

The invention discloses an experiment device for a spontaneous combustion characteristic test during the coal rock creep process. The experiment device comprises a coal accommodating container, a pressure applying mechanism used for applying static pressure to a coal sample in the coal accommodating container, an inflation system used for inputting mixed gases of air and nitrogen to the coal accommodating container and a gas collecting unit used for collecting the gases outputted from the coal accommodating container; an upper cover is arranged on the upper end of the coal accommodating container and is in sliding match with the inner wall of the coal accommodating container; a sensor support framework is arranged in the coal accommodating container, a plurality of temperature sensors are arranged on the sensor support framework, a pressure sensor is arranged on the top surface of the coal sample in the coal accommodating container, a pressure testing tube is connected on the coal accommodating container, and a first gas-pressure meter and a vent valve are arranged on the pressure testing tube. The experiment device is simple in structure, convenient to use and capable of obtaining impact of factors of the static pressure, oxygen concentration, grain size and the like during static creek of coal rocks, better guiding coal mine fire prevention and improving a forecasting system for coal spontaneous combustion.

Description

technical field [0001] The invention belongs to the technical field of testing coal spontaneous combustion characteristics, and in particular relates to an experimental device for testing spontaneous combustion characteristics in coal rock creep process. Background technique [0002] Coal spontaneous combustion disaster is one of the important disasters in my country's coal mines. Every year, there will be accidents of mine spontaneous combustion causing casualties, which will bring great harm to the safe production of coal mines. The key link in the current fire prevention and extinguishing system of coal mines in my country is the coal spontaneous combustion tendency test in the early stage of mining, and the establishment of a perfect coal spontaneous combustion fire prediction and monitoring system strives to eliminate the fire in the bud. Among them, the coal spontaneous combustion prediction system plays a vital role in the whole system, and there are many factors that...

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Problems solved by technology

At present, the macroscopic experimental devices for the spontaneous combustion characteristics of coal are only the tests of the spontaneous combustion characteristics under the conditions of changing the coal sample particle size, changing the ambient oxygen concentration, the intensity of the wind supply, and the heat storage environment; the experimental device for the study of coal rock creep , is limited to the change of mechanical properties during the creep process

However, there is no report on the change law of spontaneous combustion characteristics of coal during the creep process under the action of static pressure. However, in field practice, it often occurs that the creep process of coal affects the spontaneous combustion prediction index system. It interferes with the existing forecasting index system of the coal mine and brings certain troubles to the normal production activities of the coal mine.

However, people do not have a corresponding understanding of the factors affecting the variation of spontaneous combustion characteristics in the process of coal creep and the relationship between them. The law of influence of factors, in order to better guide the prediction and forecasting of coal spontaneous combustion fires on site

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