摘要
分析了世界发达国家对煤矿回采工作面液压支架工作阻力确定的几种方法,并对我国现阶段煤矿常采用的液压支架高工作阻力提出质疑。高工作阻力的液压支架造价高,设计、制造、使用困难,甚至导致某些顶板状况变坏,顶板下沉量增加。
The article analyzes several methods about how to determine the working resistance of hydraulicbracket on coal stope, and raises questions about the high working resistance of hydraulic brackets now usedin our coal mines. The hydraulic bracket with high working resistance costs high, andit is difficult to design,make and use. Whats more, it sometimes even causes the worsening and sinking of some of the roofs.
出处
《昆明冶金高等专科学校学报》
CAS
2002年第3期14-15,共2页
Journal of Kunming Metallurgy College
关键词
液压支架
工作阻力
顶板
顶板下沉
hydraulic bracket
working resistance
roof
roof sinking
