| Dagushan iron mine is a typical opencut sunken mine , it has a mining history of nearly 100 years . In order to solve the problem of low stripping ratio and the narrow mining space , Dagushan mine began to adopt the technology of sharp slope mining in 1989.Through the adoptation of such technology, we can achieve obvious economic profit. But in the same time , there is a widespread problem . That is to affect the full play of the producing capacity , lower the efficiency of the instruments , increase the producing cost of mining , have a greater demand for management .Therefore it has more important significance to make further research in the sharp slope mining technology.Based on systematic analysis of the present technologhy used both in our country and other countries , integrated these technology with the objective reality of Dgushan mine , this thesis made some comprehensive research in the practical problems, and proposed some methods to solve these problems .Through the comprehensive research , the final results showed that to adopt the sharp slope mining technology in Dagushan mine , we can achieve obvious economic profits .The economic profits of the sharp slope mining technology has positive relations with the angles of the mining slope . When the angles of the mining slope draw near to the limit angles , the economic profits reach the maximum .Compared with the traditional methods of mining, using the sharp slope mining technology can have smaller parameters in the working space , and in the same time have greater demand for safty management and production management. In the aspect of producing cost, this technology have higher cost than the traditional methods . So in the practical use , comprehensive consideration shoud be made , and the negative... |
