| 摘要 |
A one-way retracting energy-absorbing support belongs to the technical field of coal mine roadway supporting and is mainly applied to a U-shaped steel support in extraction roadways of the deep mine with pressure bumping. The one-way retracting energy-absorbing support comprises an upper cushion plate (1), an energy-absorbing column (2), a lower cushion plate (5), a pneumatic impact-proof cylinder (6), a clamping ring (7), a connecting rod (3) and an energy-absorbing connecting beam (4). A one-way retracting device (10) capable of preventing the upper cushion plate and the lower cushion plate from performing separating movement is arranged between the upper cushion plate (1) and the lower cushion plate (5). The one-way retracting device comprises a retracting unlocking device used for removing retracting obstruction of the upper cushion plate (1). The one-way retracting energy-absorbing support has the advantages of high strength and corrosion resistance, can quickly abdicate and absorb energy under the dynamic load conditions, and is safe and reliable. |
