Experimental Research on"110 Method"No-Pillar Mining Technology in Sanjiaohe Coal Mine
For low rate of recovery,high roadway excavation and poor safety duo to maintaining the pillar underground in a coal mine,"110 Method"is designed to increase the rate of recovery of coal resource.In the context of 10-207 working face of Sanjiaohe Coal Mine,the angle of the roof cutting hole and roof cutting height are simulated and analyzed via the theoretical analysis,value simulation combined with practice.After dynamic monitoring of the roof cut roadway,it's concluded that the minimum roof settlement of the roof cut roadway is ensured when the roof cutting angle is 5° and the roof cutting height is 20.5m,which facilitate the management and maintenance of the roadway.
roof cutting for pressure relief110 method,mined out area
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