Gas Occurrence Characteristics and Emission Quantity Prediction of the 3#Coal Seam in Datong Coal Mine
The increase in mining depth and mining speed led to frequent gas dynamic outburst disasters.Gas prediction and evaluation of the entire mining area become important research directions for mining tasks.In order to further reveal the gas occurrence and outburst possibility within the Datong mining area,measured data from the mining area are used to predict the gas content and emission quantity within the scope of the mine.The research results show that the gas storage capacities and burial depths of the four mining areas are fitted.The fitting relationship between the burial depth and gas content of the 3#coal seam is W=0.005 7H+2.161 8(R2=0.88).The separate source prediction method calculates the gas emission quantities from the stoping working face,excavation working face,and production mining area,respectively.The gas content of the 3#coal seam in the mine field is characterized by high in the north and low in the south.The maximum absolute gas emission quantity from the mine reaches 14 m3/min,and the relative gas emission quantity are about 5.6 m3/t.
国家科技期刊平台
NSTL
万方数据
