Surrounding rocks control technology and application of automatically formed roadway in mining without coal pillar and gateroad excavation

In terms of the fact that the traditional mining method causes the high drivage rate and low resource recovery rate, a new mining technology, mining without coal pillars and gateroad excavation, was put forward based on the idea of roof cutting and automatically formed roadway. The concrete mining method of working face and the principle of roadway formation were explicated by comparing with traditional coal mining technology. Through the analysis of the movement characteristics of roof rock, a mechanical model of surrounding rock structure was established, and the formula for calculating the resistance of roof support is derived.Supporting technology matching with the new mining tech-nology was studied on the basis of the characteristics of surrounding rock movement. Besides, the zoning supporting concept was proposed and applied in the field, which means that different support measures should be taken in different areas. Field test results show that the new mining technology has achieved the goal of mining without coal pillars and gateroad excavation in advance.