Design and application of hydraulic support for advance support in fully-mechanized caving face of ultra-thick coal seam
In order to reduce the risk of single pillar support in the ultra-thick coal seam fully-mechanized caving face roadway,simplify the support process,and improve operational efficiency,based on the geological occurrence of the ultra-thick coal seam in the Buliangou Coal Mine and the characteristics of the fully-mechanized mining process,a hydraulic support selection design for advanced support of the ultra-thick fully-mechanized caving face roadway was carried out,and industrial field tests were conducted.The on-site results indi-cated that the during the process of application of ZQL2 ×6500/27/50D type end advanced hydraulic support,the maximum subsidence of the roof in the front section of the roadway was 127 mm,the maximum displacement of the two sides was 466 mm,and the maximum working resistance of the hydraulic support on the working face was 46 MPa.The deformation of the roof and two sides in the front sec-tion of the roadway was effectively controlled.The on-site test has achieved good results,which can provide reference for the advanced hydraulic support technology of the fully-mechanized top coal caving working face in ultra-thick coal seams.
ultra-thick coal seamadvanced supportfully-mechanized caving facehydraulic support
万方数据
维普
