A Method for Predicting the Risk of Spontaneous Combustion in Gas Drainage Boreholes

Abstract

The invention provides a method for predicting the spontaneous combustion risk of a gas drainage borehole, and relates to the technical field of coal mine safety engineering. The invention provides a method for predicting the spontaneous combustion risk of boreholes for underground gas drainage in coal mines. In order to understand the degree of spontaneous combustion of boreholes for gas drainage and the relationship between spontaneous combustion of boreholes and its influencing factors in the process of gas drainage, a method is proposed. Improving CRITIC's G2 Empowerment Act. By introducing the Euclidean distance function, an optimal decision-making model is established, and the CRITIC weighting method is used to modify the G2 weighting method to obtain the comprehensive weight of each index. Based on the ranking method of approaching the ideal solution, that is, the G2 weighting method of the "driving function" principle of the TOPSIS theory, the G2-TOPSIS drilling spontaneous combustion hazard evaluation model is established, and the closeness is analyzed to finally predict the drilling spontaneous combustion risk degree.

Description

technical field [0001] The invention relates to the technical field of coal mine safety engineering, in particular to a method for predicting the spontaneous combustion risk of a gas drainage borehole. Background technique [0002] Spontaneous combustion of gas drainage boreholes is an internal coal mine fire affected by many factors. With the increase of mining depth and intensity, the initial temperature of coal seams increases, especially for high-gas spontaneous combustion coal seams, and the risk of spontaneous combustion of drainage boreholes is becoming more and more serious. , but spontaneous combustion often occurs at a certain distance from the exposed surface of the coal body, and there is only smoke but no open flame, so it is difficult to determine the location of the fire source. Once the drainage borehole spontaneously ignites, the borehole will stop pumping or be scrapped. In severe cases, it will also cause disasters such as explosion of the drainage pipelin...

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Problems solved by technology

[0003] For a long time, scholars at home and abroad have conducted a lot of research on the prediction of coal spontaneous combustion hazards. These studies have played an important role in the prediction and prevention of mine spontaneous combustion fires to a certain extent. Difficult to determine, the consideration of model index factors is not comprehensive enough, and the primary and secondary factors affecting coal spontaneous combustion are not clear

At present, there is still a lack of research on the influencing factors and prevention of spontaneous combustion in drainage boreholes, and spontaneous combustion disasters in boreholes occur from time to time

During the gas drainage process, due to the lack of tight sealing of the boreholes and air leakage, some boreholes spontaneously ignited, which led to the suspension of the borehole drainage, and even made the boreholes scrapped

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