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由煤科院北京开采所支架室支架一组设计、兵器部重庆双溪机械厂制造的SDA型端头支架,在四川松藻矿务局打通一矿S1809综采工作面使用,自1985年10月以来,情况良好。 S1809是采用QY200—14/31经济型液压支架及其配套设备的综采工作面。煤厚平均2.22m,倾角5°,面长133～153.7m,倾斜开采。SDA型端头支架用于运输巷。其主要技术特征为;高1800～3450mm;中心距为1300mm;顶梁总宽度(2架)为2500mm;初撑力为168/358.4t;工作阻力为429.75～445.8t;支护强度为21.41～33.62t/m~2;
SDA-type end brackets manufactured by Chongqing Shuangxi Machinery Factory of Weaponry Department, a set of stent support of Beijing Mining Institute of Chinese Academy of Coal Science and Technology, used the S1809 fully mechanized mining face of No.1 Mine in Songzao Mining Bureau of Sichuan Province for use since 1985 Months, the situation is good. S1809 is the use of QY200-14 / 31 economic hydraulic support and its supporting equipment fully mechanized mining face. The average coal thickness 2.22m, dip 5 °, surface length 133 ~ 153.7m, inclined mining. SDA end bracket for transport lane. The main technical characteristics are: height 1800 ~ 3450mm; center distance is 1300mm; total width of the top beam (2) is 2500mm; initial support force is 168 / 358.4t; working resistance is 429.75 ~ 445.8t; support strength is 21.41 ~ 33.62t / m ~ 2;