A Gas Prediction Model After Coal Mining

Abstract

The invention discloses a gas prediction model after coal mining, which can simulate roadway scale, atmospheric pressure, mining depth and gas concentration, and analyze the gas emission. It is characterized in that it includes a main body box, a simulation system and a gas surge The output detector, the simulation system is placed in the main box, and the gas emission detector is placed in the simulation system. After the simulation system simulates the tunnel scale, atmospheric pressure, mining depth, and gas concentration, the gas emission detector It can accurately simulate and predict the amount of gas emission in the coal mine roadway area after mining, so as to achieve scientific coal mine planning and mining, and can simulate the roadway environment at different depths, different external atmospheric pressures, and gas content in different coal yards The influence of concentration and external rainfall on gas emission, using 3D printing technology, can accurately simulate the different formations of mining roadways for simulation prediction.

Description

Technical field [0001] A gas prediction model of the present invention after coal mining relates to a model for predicting the amount of gas gushing out after coal mining, belonging to the field of coal mining equipment. In particular, a predictive model that can simulate the size of the roadway, atmospheric pressure, mining depth, gas concentration, and analyze the amount of gas gushing out. Background [0002] Coal mine gas, also known as coal bed methane, coal bed methane, carbon dioxide and nitrogen, etc. that escape from coal and surrounding rock, when mining coal seam, the coal body is damaged or affected by mining, part of the gas stored in the coal body will leave the coal body and pour into the mining space, this phenomenon is called gas gushing, and predicting the amount of gas gushing out after mining, which is of great significance to prevent the underground roadway gas explosion, at present, the amount of coal mine gas gushing out and the gas content of the mining co...

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Problems solved by technology

[0002] Coal mine gas, also known as coal bed gas or coal bed methane, is a mixed gas composed of methane, carbon dioxide and nitrogen escaping from coal and surrounding rocks. When mining a coal seam, the coal body is damaged or affected by mining, and the part stored in the coal body Gas will leave the coal body and pour into the mining space. This phenomenon is called gas gushing, and predicting the gas gushing amount after mining is of great significance for preventing gas explosions in underground roadways. The gas content of coal seams and surrounding rocks, mining scale, mining sequence and mining method, production process, atmospheric pressure changes, air volume changes, goaf sealing quality and other factors are all related. The analysis of gas emission data to infer the gas emission after mining is inaccurate. A method is needed to simulate the influence of factors such as roadway scale, external atmospheric pressure, coal seam gas concentration and mining depth on the gas emission after roadway mining. The test model device

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