Backfill Coal Mining Technology with High Concentrated Cementing Material in Underground Mine

In order to effectively control the surface ground movement caused by the seam mining and to further improve the recovery rate of the coal resources,in combination with the mine backfill mining status,the mine backfill mining method with the high concentrated cementing material was provided.With the similar simulation method,from the movement modes of the overburden strata,influence scope of the in advance support pressure,periodical roof weighting strength of the coal mining fac e,the rational working resistance of the powered support and other aspects,the mine strata pressure behavior law of the backfill mining face with high concentrated cem enting material was studied.Based on the mine strata pressure behavior law as the basis,the relevant powered support and the isolated powered support for the backfill mining were designed.While a large backfill space could be formed,the roof subsidence value would be reduced before the coal mining face backilled.The layout mode of the coal mining face backfilled with high concentrated cementing material and the backfill basic technique of the coal mining face were stated,the mining and backfill material setting simultaneous operations could be realized and the backfill efficiency of the coal mining face was efficiently improved.