Abstract: In the development engineering design of Luohe Iron Mine,in order to reduce the mining dilution rate,the mining preparation engineering is arranged at the level of -497 m,resulting in the loss of the triangular ore body left in the lower part.Through the design of -512 m shallow mining house,the 120 000 tons of triangular ore under the pressure of 259# stage stope is recovered to reduce the dilution;the level of -455 m is the level of drilling and return air,during the construction period,the waste rock is piled up by the onsite roadway,making -455 m roadway in 80~90 Lane area of 55 m level is occupied by waste rock,and the passage is blocked,which seriously affects the ventilation of the site and the passage of personnel and equipment.By using 259# stope cutting patio as waste rock filling well,a large amount of waste rock piled up in the upper -455 m horizontal 70~100 lane and 28~33 access area roadway is filled to -512 m shallow goaf.Through innovative application,it not only recovers the corner ore body and improves the recovery rate of resources,but also solves the problem that the waste rock in -455 m horizontal drilling roadway can not be treated for a long time,and the mining cost is greatly reduced by using the solid waste filling compared with the tailings cemented filling.

Key words: corner orebody,shallow mining design,overburden ore volume,solid waste filling,reduce dilution