Index gas based goaf coal spontaneous combustion hazard level judgment and prewarning method

Abstract

The invention discloses an index gas based goaf coal spontaneous combustion hazard level judgment and prewarning method. The method comprises the steps of 1, arranging a coalmine goaf coal spontaneous combustion index gas monitoring device; 2, acquiring and transmitting coalmine goaf coal spontaneous combustion index gas concentrations; and 3, performing analysis processing on each gas concentration of a coalmine goaf as well as the CO concentration, the C2H4 concentration and a temperature signal detected by a temperature sensing probe by a ground monitoring computer, and performing coal fire hazard risk prewarning. The method is simple in step, novel and reasonable in design, convenient to realize, high in automation degree, high in reliability, comprehensive and accurate in goaf coal spontaneous combustion degree prediction, wide in application range, high in practicality, good in use effect and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a method for judging and early warning of coal spontaneous combustion risk degree in goafs based on index gas. Background technique [0002] Coal spontaneous combustion fire is one of the five major disasters that seriously threaten the safe production of coal mines in China. 56% of my country's key state-owned coal mines have the danger of coal spontaneous combustion, and coal spontaneous combustion in goafs accounts for the vast majority of coal spontaneous combustion fires in mines. The roof management of the goaf adopts the spontaneous combustion and caving method. After mining, the goaf will be covered by the caving of the upper layer of rock, so that the state of spontaneous combustion of the coal left in the goaf cannot be directly and simply detected. Therefore, the coal left in the goaf The determination of the degree of spontaneous combustion is still...

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Problems solved by technology

[0002] Coal spontaneous combustion fire is one of the five major disasters that seriously threaten the safe production of coal mines in China. 56% of my country's key state-owned coal mines have the danger of coal spontaneous combustion, and coal spontaneous combustion in goafs accounts for the vast majority of coal spontaneous combustion fires in mines. The roof management of the goaf adopts the spontaneous combustion and caving method. After mining, the goaf will be covered by the caving of the upper layer of rock, so that the state of spontaneous combustion of the coal left in the goaf cannot be directly and simply detected. Therefore, the coal left in the goaf Determining the degree of spontaneous combustion is still a problem that plagues the safe production of coal mines in my country

However, the traditional goaf monitoring and coal spontaneous combustion determination methods mainly include the goaf bundle tube monitoring system, which can only monitor the spontaneous combustion of coal remaining in the goaf within a small range of the two working faces. The monitoring effect of a large number of personnel maintenance work is not good, and the wireless monitoring of the goaf can arrange measuring points within a certain range. However, the wireless signal in the goaf can only transmit 5 to 10m, and it uses

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