液压支架顶梁外载作用位置理论研究与应用

Theoretical study and application on external load function location of canopy in hydraulic powered support

针对液压支架顶梁外载作用位置不明确的问题,基于顶板弹性岩梁假设,研究了工作面顶板岩层挠度变化情况,推导出外部载荷在液压支架顶梁上的作用位置,给出了两柱掩护式液压支架顶梁前后端到支架合力作用点距离之比和四柱支撑掩护式顶梁长度确定原则。结果表明,支架合力在顶梁上合理位置的比值为2.67,理论结果与经验数据基本一致,可以用于液压支架设计。

According to the uncertain external load function location problem of the canopy in the hydraulic powered support,based on the assumed elastic rock beam of the roof,the paper studied the deflection variation condition of the roof rock strata above the coal mining face,derived the function location of the external load on the canopy of the hydraulic powered support and provided the principle to determine the canopy front and rear ratio of the two leg shield powered support and the canopy length of the four-leg shield powered support.The results showed that resultant force ratio of the hydraulic powered support on the rational location of the canopy was 2. 67,the theoretical results and experience data would be the same basically and could be applied to the design of powered support.