COAL ENGINEERING ›› 2018, Vol. 50 ›› Issue (8): 89-92.doi: 10.11799/ce201808024

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

  

  • Received:2016-12-25 Revised:2017-03-20 Online:2018-08-20 Published:2018-12-17

Abstract: 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.

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