This paper mainly introduces the load distribution characteristics of metal roof beam and protection beam of coal mine hydraulic acrow props. For your safe use, it is recommended to select the metal roof beam and suspension hydraulic prop produced by China Coal Group.
The suspension hydraulic prop uniformly distributed load on the fully mechanized top coal caving face, and the load distribution characteristics on the metal roof beam and the hydraulic support protection beam are small and average. For the values of BTX and BTY, considering that the rear wheel of the vehicle is close to the tread, after the load under each tire diffuses through a certain thickness of filling soil, the foundation of the dip coating surface may overlap.
Therefore, it can be considered that all the rear wheels of the car need to be dip coated on the corresponding plane. The steel acrow props of low level caving coal has a strong flexibility, and has successfully realized the fully mechanized steep coal seam, gently inclined medium hard coal seam and three soft coal seam fully mechanized caving mining, which is currently widely used in China. The hydraulic support is not only suitable for blasting coal face, but also the necessary steel acrow props for the roof support of the general coal face.
Because the load of metal roof beam is much larger than the gravity of metal roof beam, the influence of gravity is ignored in the calculation of these three loads. In the actual underground engineering design, column and foundation design, the load code in Appendix b.0. B.0 is recommended. 8. System calculation; the calculation method of equivalent uniform live load of main beam is defined. In China, the development of steel acrow props for fully mechanized top coal caving mining starts from the development of hydraulic support for fully mechanized bottom coal caving.
