Dong Zhifeng

Li Haibo

Sun Miao

Xing Jiaqiang

Wang Bing

Department of Mechanical and

Electronics Engineering,

  China University of Mining

and Technology

Beijing 100083, China

Wu Jian

Department of Mining Engineering,

China University of Mining

and Technology,

Beijing 100083, China

CAVING HYDRAULIC SUPPORT*

Abstract: A new type of top-coal caving hydraulic support and its characteristic are discussed. The multi-freedom mechanism of the support is simplified as a planar mechanism to get a direct analytic solution. The kinematic analysis of the support are made to present the equations which indicate the parametric relationship of geometry and motion of the components. The key formula deduced here can be used not only to virtual reality but also to practical application of the hydraulic supports. In order that the top beam of support can move horizontally, which makes the support work perfectly and effectively, the front and back legs must move at certain velocity coordinately. With the method of virtual design, the errors and faults are fined easily, many improvements are made in time, which makes the new hydraulic support developed successfully.