Research and application of roof cutting and roadway protection technology in reserved withdrawal channel for face stopping mining line of hard roof thick
In view of the large deformation,the large amount of maintenance work,the wide coal pillar of the stop line,and the large waste of coal resources of the development roadway in Yitang Mine affected by the mining of the working face,the technology of roof cutting and roadway protection in the reserved withdrawal channel of the stop line was tested in No.100505 Face of the mine.In order to control the stability of the surrounding rock of the retracement channel and cut off the transmission of the mining dynamic pressure to the nearby roadway,the retracement channel was set up in advance in the stop line,and the surrounding rock control technology of the constant resistance large deformation anchor cable and the directional pre-splitting cutting blasting technology were used.Through the implementation of the project,the retracement channel was stable and met the requirements of working face recovery;the deformation of the roadway near the stop line was reduced,and no maintenance project was needed.The width of the coal pillar of the stopping line was obviously reduced,which effectively improved the recovery of coal resources.The technology had considerable economic benefits and was worthy of popularization and application.
stop mining line at the working facereserved withdrawal channelroof cutting and roadway protection
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