1 前言在甘肃省煤矿中,厚煤层约占总量的90％,且大多为中小煤矿,故急需发展轻型液压支架,以便与现有采煤机、运输机及乳化液泵配套,装备采煤工作面,并适应因地质条件复杂、煤层厚度和倾角多变的急倾斜特厚煤层综采放顶煤采煤技术的需要。目前,国内放顶煤液压支架一般每架重 1 Introduction In the coal mines in Gansu Province, thick coal seams account for about 90% of the total and are mostly small and medium-sized mines. Therefore, the development of light hydraulic supports is urgently needed in order to support existing coal mining machines, transport machines and emulsion pumps, equip coal mining work Surface and adapt to the needs of the fully mechanized top coal caving mining technology due to the complicated geological conditions, the thick coal seam thickness and the steep dip thick coal seam. At present, the domestic top coal hydraulic support each frame weight