Stability Control of Surrounding Rock on Shallow Buried Deep Yellow Mud Roof Working Face
In order to effectively control the large area of yellow mud roof collapse during the mining of 9114 fully mechanized mining face in Qiyi Coal Mine,the causes of surrounding rock instability of shallow buried deep yellow mud roof working face are revealed through theoretical analysis,microstructure test and field practice,and the direct roof stability control technology of"Bottom leaving and top cutting,short support and short protection,and quick movement with minimal lowering of supports"is proposed.Field application shows that the technology can effectively control the yellow mud roof fall accident of 9114 working face,the roof and floor movement is stable in the controllable range,ensure the normal mining of the working face,and provide a certain reference for the stability control of surrounding rock under similar conditions.
Shallow buried coal seamsYellow mud roofShort support and short protectionSurrounding rock stability
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