Innovation and Development of Hydraulic Powered Caving Support

The paper reviewed the development history of the top coal caving technology in China and introduced the innovated achievements of the hydraulic powered caving support in China.The paper stressed the new development of the hydraulic powered caving support in China.The paper stated the application of the hydraulic powered high cutting and caving support and the key technologies,including the open large space support stabilized structure in the patent technology new double four connection bar,the anti impact leg,the support stability measures and the coal wall spalling control measures and others.The paper analyzed the features of the new separated combined type straight line mode hydraulic powered caving support,the flexibility and the stability and provided the development orientation of the hydraulic powered caving support,including the development of the two leg hydraulic powered caving support,the light weight hydraulic powered caving support,the hydraulic powered high cutting caving support,the hydraulic powered caving support in shallow depth thick seam,the hydraulic powered caving support in thick seam of deep mine and others.