New Thinking About Exploitation of Coal Seams with High Gas Content and Main Problems to be Researched

A new thinking was put forward about exploitation of coal seams containing high content gas, i.e., in a sealed space, gas and coal are mined simultaneously, the sealed space can be turned to an open space when needed. When mining machinery is running speedily and gas emission is high, the return airway and haulage gateway of a working face are sealed in order to maintain over 30% gas concentration in the working space. In this case, gas explosion will not happen. Thus the efficiency of mining machinery can be promoted, and the target of high production, high efficiency and high safety can be achieved. When troubles occur in the working and the production must be stopped in order to handle the troubles, the sealed gates in the return airway and haulage gateway can be opened, the ventilation of the working face will be resumed. Simultaneous exploitation of coal and gas is a new method to coal seams containing high content gas. But the relative main problems must be researched deeply.