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综合机械化采煤是煤矿技术进步的标志,是煤矿增加产量、提高劳动效率、增加经济效益的重要手段。实践证明大力发展综合机械化采煤,研制和使用液压支架是十分关键的。我们国家从60年代起研究支撑式液压支架,至今已能成批制造两柱掩护式和四柱支撑掩护式支架,这些液压支架一般用于缓倾斜中厚煤层及厚煤层分层开采。
Comprehensive mechanization of coal mining is a sign of technological progress, is an important means for coal mines to increase production, improve labor efficiency and increase economic efficiency. Practice has proved that to develop fully mechanized coal mining, development and use of hydraulic support is very crucial. Since the 1960s, our country has studied supporting hydraulic supports. Up to now, two-post shields and four-post support shields have been manufactured in batches. These hydraulic supports are generally used for the mining of gently inclined thick and thick seams.