基于覆岩结构的沿空留巷充填体载荷估算方法

Load estimating method of packing body for gob-side entry retaining based on overlying strata structure

针对部分充填体载荷设计公式复杂、参数选取随意等造成的留巷失败或浪费等问题,通过分析沿空留巷上覆岩层移动规律,提出了基于采动覆岩结构和ALPS的充填体承载特性,并给出了不同顶板条件下沿空留巷后期充填体载荷的简化估算公式。该估算方法在坚硬及中硬顶板条件下沿空留巷实践中得到成功验证,为沿空留巷充填体的设计提供一定借鉴。

Some formulas of packing body load design were complicated and parameters were hardly determined,which could make gob-side entry retaining failure or materials waste. By analyzing overlying strata structure in gob-side entry,packing body loading characteristics based on overlying strata structure and ALPS were proposed and simplified estimating formula of packing body＇s stable load in later stage of gob-side entry retaining under different strata was put forward. The method was successfully verified in gob-side entry retaining under medium hard and hard roof,providing experience for design of packing body in gob-side entry retaining.