Structural characteristics of key strata and strata behaviour of a fully mechanized longwall face with 7.0 m height chocks
作者： Jinfeng Ju , Jialin Xu
DOI: 10.1016/J.IJRMMS.2012.09.006
关键词:
摘要: Abstract Strata behaviour during the operation of super great mining height (SGMH) longwall face is different from that normal due to extra large boundary caved roof strata. The key control strata understand structural characteristics (KS) and its movement law. Through field observation, physical model simulation theoretical analysis on first with 7.0 m in world, three kinds model, which are affected by relative position KS overburden, found defined. Model A defined as when stable voussoir beam structure can be developed overlying gentle. B cantilever while other KS, continuous distance periodic weighting (CDPW) typically longer compared face. As C, same B, but will forced break advance second adjacent present step severity a alternating between long/gentle short/strong. With respect models, method suitable for calculation working resistance chocks was proposed. LW22303 Bulianta coal mine determined 17,612 kN.
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