Abstract:Yinshan Mine is rich in geological resources with complex ore-forming geological conditions and large buried depth of ore bodies. It is the second standard prospecting type deposit in China. The copper-sulfur-gold section in Area 9 of Yinshan Mine is underground mining. The mining method is sublevel open stoping followed by filling，and the ore is mined in two steps. Because the rock of the deposit is unstable，roof fall and collapse often occur in the mine room outside the eyebrow line of the mining roadway during one-step mining， For safety reasons，the cab of the scraper cannot cross the eyebrow line to enter the empty area for operation，so the scraper can only shovel out the ore within the range that the shovel arm can shovel，and the ore further away can only slide to the area that can be shoveled out by its own weight. Due to the factors of natural angle of rest of ore，there is still a part of ore left in the goaf which cannot be shoveled out，thus forming ore residual loss at the bottom of stope. At the same time，the residual ore directly affects the filling quality and thus the second-step mining. In this paper，the remote monitoring and control system of scraper had been successfully developed through the scientific research project. The system cald realize remote monitoring and control operation of scraper in complex environment such as underground without lighting，and realize unmanned mining in dangerous area of underground. The practice showed that the technical equipment of residual ore recovery in Yinshan Mine was safe and reliable，which calld improve the resource recovery rate，bring objective economic benefits to enterprises and prolong the mine life.