A New Method for Controlling Rockbursts in the Mining Roadway of Ultrathick Coal Seams Based on the Dual Pressure Relief Method

Figure 1

The principle of the dual pressure relief technology applied in the mining roadway of ultrathick coal seams. (a) Before mining the working face by using dual pressure relief. (b) Structure of overlying strata after conventional mining of the working face. (c) Structure of overlying strata after mining the working face by using dual pressure relief.

(a)

(b)

(c)