Main support types: ZFY21000/35.5/70D, ZFY21000/29/50D
The ZFY21000/35.5/70D two-leg shield type top-coal caving hydraulic support is the two-leg top-coal caving hydraulic support with the world's highest working resistance and maximum mining height. It was applied at Jinjitan Coal Mine in January 2019, achieving a maximum daily output of 79,100 tons and an average daily output of 50,000 to 60,000 tons at the working face, with an annual production capacity of 20 million tons for a single working face.
序号 | 项目 | 参数 | 单位 |
1 | 型 式 | 两柱掩护式放顶煤液压支架 | |
2 | 支架高度 | 3550~7000 | mm |
3 | 支架中心距 | 2050 | mm |
4 | 支护强度 | 1.60~1.65 | MPa |
5 | 底板前端比压 | 3.1~5.5 | MPa |
6 | 工作阻力（P=47.6MPa） | 21000 | kN |
7 | 操作方式 | 电液控制 | |
8 | 移架步距 | 865 | mm |
Main Performance Indicators
1. The design and manufacturing standards adopt GB25974.1 and EN1804.
2. The support undergoes 30,000 cycles of type testing.
3. The support can be used underground for five years without being lifted to the surface.
