| The law of gas-geology is the basic law of studying the generation , distribution , migration and changes of the gas.It has been proved that gas-geology theory and technology is the basis of how to solve the gas disaster.This article uses the theory of the plate tectonics , regional geological evolution and gas level-control .It study the evolution of tectonic stress field and crustal movement of Junlian minefield which has be caused by the tectonic movement. Moreover, it analysis the control function of the generation , distribution and migration of the gas.Junlian minefield is located in the western of the Yangzi block , which is mostly controlled by the sichuan-yunnan NS tectonic belt , sichuan basin , yanjin-weixin tectonic belt . The minefield structure forms a series of EW , NE to the NNE of the foreland fold , whose main structure is EW anticline of Luomurou compound . Outburst is likely to occur in the structural composite parts . After the Junlian minefield coal-bearing strata deposited , it was mostly experienced two deformations extrusion which contained the direction . extrusion of earlier pressure north-south and later north west-south , the two deformations occured in the late yanshan . Two constructions of the coal seam has taken agreat impact on the generation , distribution , migration and changes of the gas . Lubanshan mine are high-gas mines . Through the gray relational methods and analyzing the geological factors to get the main coal seam gas content of the controlling factors for the thickness of overlying rock and roof shale thickness , and using the multi-regression methods to derive the Lubanshan mine's mathematical model of gas content .Using prediction of sub-gas source to predict the absolute gas emission in coal face . It analysis and evaluate the risk of outburst of the coal and gas . It calculating the methane resource in coal-bed , and identifying it as the secondary resource abundance . |
