Dynamic prediction of gas emission in working face based on gas content inversion
In order to solve the problem that gas emission from coal mining face can not be predicted accurately in real time,the difficulties and treatment methods of gas content inversion in working face were expounded by analyzing the sources and influencing factors of gas emission from mining face.On this basis,the inversion model of gas content was established,and the dynamic prediction method of gas emission from working face based on gas content inversion was put forward.The prediction method was based on the premise that the occurrence state of gas in coal is a continuous change,and the amount of gas emission was predicted through the inversion of coal gas content in working face and the determination of gas emission characteristic coefficient.The industrial test in Shaanxi Xiangshan Coal Mine shows that the prediction method can favorably predict the amount of gas emission from the coal face.The absolute error range between the predicted value and the measured value of gas emission is between 0.09～0.20 m3/min,and the error percentage is controlled within 20%.With this method,the gas emission from mining face can be continuously prediction in real-time,thus to ensure the safe and efficient production of coal mines,and provide technical support for the prevention of coal and gas outburst and gas overrun.
gas content inversiongas emissioncontent predictionprediction of gas emissionprediction method
NETL
NSTL
万方数据
