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《Coal Science and Technology》 2014-01
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Application and Technology Research on Rapid Gob- side Entry Retaining in Shendong Mining Area

CUI Ya-zhong;Electromechanical Management Department,Shenhua Shendong Coal Group Corporation Limited;  
According to the inadequate,poor leakproofness performances and low mechanization degree problems between the support resistance,yielding and other mechanics performances existed in the conventional sidewall support of the gateway and the surrounding rock deformation of the gob- side entry retaining,based on the analysis on the pneumatic backfill gateway retained,high water material backfill gateway retained,face end steel module support and pumping backfill gateway retained and concrete backfill gateway retained with the flexible module,an evaluation was conducted on the equipment allocation and operation conditions of four gateway retained methods. Finally,a flexible module concrete preparation and conveyor unit was selected for the rapid gob- side entry retaining in Yujialiang Mine. A surface concrete dry mixing and a concrete feeding in underground mine,mixing with water and continued pumping operation could be realized. The study showed that the set equipment could meet the requirements of the rapid gob- side entry retaining in Shendong Mining Area,the backfill speed could be reached to 20 m / shift and the compressive strength of the backfill mass could be reached to 25 MPa.
【Fund】: 国家高技术研究发展计划(863计划)资助项目(2012AA062203)
【CateGory Index】: TD353
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