Hydraulic System Design of Temporary Support for Fast Excavation of Top Coal

Aiming at the problems of long time-consuming auxiliary operation, low excavation efficiency, high labor intensity and poor production safety in mechanized excavation construction of coal roadway, a temporary support for rapid excavation of top coal in thick coal seam is developed. The support is composed of inner frame assembly, outer frame assembly, inner and outer outrigger oil cylinders, walking oil cylinder, deviation rectification oil cylinder, auxiliary frame, hydraulic pipeline and hydraulic system. Through the design of the hydraulic system of the temporary support for the fast excavation of top coal in thick coal seam, the working pressure of the hydraulic system is determined, the composition and working principle of the hydraulic control system are analyzed and designed, and the hydraulic cylinder of inner frame outrigger, the hydraulic cylinder of outer frame outrigger, the hydraulic cylinder of auxiliary frame, the horizontal hydraulic cylinder and the adjustable spring hydraulic cylinder of the temporary support for the fast excavation of top coal in thick coal seam are designed and verified. The temporary support for fast excavation of top coal in thick coal seam can timely support the new exposed roof cut by roadheader, protect the safety of personnel and equipment in the working space, shorten the working time of support, improve the working efficiency of excavation support, reduce the labor intensity of workers, improve the production safety, accelerate the excavation speed of heading face, and improve the economic and social benefits of enterprises.