Multifunctional simulation experiment table for researching spontaneous combustion characteristic of residual coal under the action of multiple disaster-causing sources of deep well

Abstract

The invention provides a multifunctional simulation experiment table for researching a spontaneous combustion characteristic of residual coal under the action of multiple disaster-causing sources of adeep well, and relates to the technical field of mine safety engineering. The simulation experiment table comprises a stope structure simulation system, a gas emission control system, a heating control system, a ventilation control system, a deep well mine pressure control system, a data information acquisition and analysis system and a central main control system; the stope structure simulationsystem is used for simulating the space structure of a stope; the gas emission control system is used for controlling gas emission; the heating control system is used for simulating terrestrial heat of the stope and heating the residual coal in a goaf; the ventilation control system is used for providing air flow for the simulated stope; and the deep well mine pressure control system is used for simulating a roof pressure of the goaf. According to the multifunctional simulation experiment table for researching the spontaneous combustion characteristic of the residual coal under the action of the multiple disaster-causing sources of the deep well provided by the invention, the degree of matching between the simulated spontaneous combustion process of the residual coal of the goaf and the real condition is high, and research conclusion and result are real and reliable.

Description

technical field [0001] The invention relates to the technical field of mine safety engineering, in particular to a multifunctional simulation experiment platform for studying the spontaneous combustion characteristics of residual coal under the action of multiple disaster sources in deep mines. Background technique [0002] At present, the number of deep mining mines is gradually increasing in my country and the world, and deep mining is also inevitable for the future development of coal mines. The expansion of mining scale and the improvement of mechanization level have accelerated the process of mine development to the deep. At present, more than 100 mines in our country have entered the stage of deep mining, and more and more mines will enter deep mining in the future. Mine fire is one of the main disasters that threaten the safe production of coal mines. Among them, fires caused by coal mines are mainly caused by spontaneous combustion of coal. More than 90% of mine fire...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the experimental research on the spontaneous combustion characteristics of coal left in gobs during deep mining, the existing technologies mainly have the following deficiencies: (1) The current experimental equipment mainly studies the characteristics of coal oxidation and temperature rise, and can obtain some relevant parameters, but cannot accurately analyze the characteristics of the mining area. Research on the law of spontaneous combustion of leftover coal in goaf, such as the dangerous area and movement law of spontaneous combustion of leftover coal in goaf, the temperature field and change law of spontaneous combustion of leftover coal in goaf, the division and change law of "three spontaneous combustion zones" in goaf, Interaction laws of various fields (temperature field, seepage field, stress field, concentration field) in the goaf, etc.

(2) In the experimental simulation process of coal spontaneous combustion, the influence of mine pressure on it is seldom considered, and only the coal is loaded according to the characteristics of shallow mine pressure, and the loading according to the characteristics of deep mine pressure is not considered ( Compared with shallow mine pressure, deep mine pressure is not only a matter of increased pressure)

In addition, when considering the influence of pressure on coal spontaneous combustion, we can only study the coal permeability and heating process under different pressures during the loading process, that is, the influence of one pressure and one permeability on the coal heating process at a certain moment, In the actual mining process, the pressure and permeability of different positions in the goaf are different, and various permeability has an impact on the temperature rise process of the remaining coal, and different permeability has mutual influence, that is, at a certain point in the goaf Internally, multi-pressure and multi-permeability simultaneously affect the process of oxidation and temperature rise of residual coal

(3) Existing simulation experimental devices seldom consider the influence of gas on spontaneous combustion of coal, and only consider the injection of gas into the experimental device to study the influence of gas content on the process of coal oxidation and heating, and cannot study the gas in gobs The influence of gushing out and gas pressure on air leakage in goaf (air leakage in goaf affects spontaneous combustion of residual coal), the influence of gas flow and concentration distribution in goaf on the heating process of residual coal, and the influence of oxidation and heating of residual coal on the law of gas migration Wait

In addition, the void ratio of caving rocks in the goaf also has a great influence on the gas migration in the goaf, and the relationship between the void ratio and the gas migration in the goaf is also difficult to study with the current experimental equipment

(4) The influence of ambient temperature on coal temperature rise and mine pressure is not considered

(5) The influence of the air supply volume and air supply pressure of the working face on the air leakage volume of the mined-out area and the spontaneous combustion characteristics of the remaining coal are not considered.

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