Study on Application of Gob-side Entry Retaining with Flexible Filling Materials in Large Mining Height and Soft Coal Seam
Aiming at the stability of the surrounding rock of gob-side entry retaining in Liangbei coal mine,a collab-orative control technology for the surrounding rock which integrates"pre-cracking of the roof,pre-support in road-way,and high-water rapid solidifying materials filling in roadway-side"is proposed.Based on laboratory tests,theo-retical analysis,engineering analogy,numerical simulation and other methods,the support parameters of pre-crack-ing,pre-support and gob-side wall with high-water rapid solidifying materials filling in the conveyor roadway of the 21051 east coal seam face were determined.The on-site monitoring results show that the deformation of the surrounding rock within a range of 120 m of the working face is increasing and then tends to stabilize.The final deformation is with-in a controllable range,and the success of retaining the roadway has been achieved.The relevant technical methods can provide a certain reference for similar gob-side entry retaining in mines.
large mining heightgob-side entry retaininghigh-water rapid solidifying materialspre-cracking roofroadside supporting
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