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由北京煤矿机械厂和西山矿务局共同研制的BC520-25/47型四柱支撑掩护式支架样机,于82年12月在煤炭科学院北京开采所液压试验室通过了型式试验,并已制成一套86架,即将投入井下工业试验。本文着重就BC520-25/47型支架的主要结构特点和型式试验的结果进行初步分析和研究。
The prototype BC520-25 / 47 four-post supporting shield developed jointly by Beijing Coal Mine Machinery Factory and Xishan Mining Administration passed the type test in December 1982 at the Hydraulic Laboratory of Beijing Mining Institute of Coal Science Academy and has been made into a Set of 86, is about to invest underground test. This article focuses on the BC520-25 / 47 stent main structural features and type test results for the initial analysis and research.