Research on rapid retraction technology of large dip coal seam face in Linsheng Coal Mine
By combining on-site mine pressure data with numerical simulation,and taking the No.1201 working face of Linsheng Coal Mine as the engineering background,the stress fireworks pattern of the retraction channel in the large angle coal seam was studied.A tech-nology combining the expansion of the coal mining machine with the combination of"anchor rod(cable)+metal mesh"support was pro-posed and applied on site.Compared with traditional pre-excavated retraction channel,this technology can significantly reduce the amount of roadway excavation,lower labor intensity,conserve coal resources,and speed up the construction of channels,providing a guarantee for high-yield and efficient mine operation.In contrast to the traditional dual-channel retraction technology,adopting theretraction and installa-tion synchronization technology can not only accelerate the construction progress of the retraction but also greatly reduce the work intensity of the staff and minimize the waste of coal resources.The successful application of this technology provides valuable experience for the re-traction and installation of similar working face equipment in mining areas such as Baoding mining area and southwest coal mines,and also offers reference for the retraction of working faces with complex geological conditions in the northeast mining area and beyond.
large dip coal seamstress evolutionshearer roadway expansionrapid retraction
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