Gas prediction model after coal mining

Abstract

The invention discloses a gas prediction model after coal mining. The gas prediction model can simulate the roadway scale, the atmospheric pressure, the mining depth and the gas concentration and analyze the gas emission amount. The gas prediction model is characterized by comprising a main body box, a simulation system and a gas emission amount detector, wherein the simulation system is arrangedin the main body box, the gas emission amount detector is arranged in the simulation system, and after the simulation system simulates the roadway scale, the atmospheric pressure, the mining depth andthe gas concentration, the gas emission amount detector detects the gas emission amount. The gas prediction model can accurately simulate the gas emission amount of a coal mine roadway area after mining, and then performs prediction, thereby achieving scientific coal mine planning and mining, being capable of simulating influences imposed on the gas emission amount by roadway environments with different depths, different external atmospheric pressures, different coal yard gas concentrations and external rainfall, being capable of accurately simulating mining roadways formed differently by using a 3D printing technology, and performing simulation prediction.

Description

technical field [0001] The invention relates to a gas prediction model after coal mining, which relates to a model for predicting the amount of gas gushing out after coal mining, and belongs to the field of coal mining equipment. In particular, it relates to a predictive model capable of simulating roadway scale, atmospheric pressure, mining depth, and gas concentration, and analyzing gas emission. Background technique [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 ...

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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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