Study On Mining Technology In The Second Mining Area Of Weijiamao Open-pit Coal Mine

Semi-continuous mining technology develops on the basis of continuous mining technology and the continuous mining technology, which also possess the advantages of discontinuous process and continuous process.It can solve the hard rock mining and realize the continuous transport of ore-bearing rock, also can give full play to the working efficiency of the mining equipment and expand the scale of production and reduce the production cost. With open pit mining depth increase and the transport distance and the stripping ratio gains, company adopt completely single bucket car mining technology,which can not improve its economic benefits,so must transit to the semi continuous mining and continuous mining technology.At present,China’s semi continuous mining is mainly used in coal mining and transportation process,and application of the semi continuous mining technology generally is little,especially large semi continuous technology application in China is neither,nor the experience in production and design. According to Wei Jia Mao opencast coal mine in two mining areas, mining depth increases and transportation and volume are larger.Mine geological model is established by using the Surpac software,which analyzs the occurrence condition of opencast coal mining,designs the mining method and provides accurate geological engineering information. Through the technical and economic system analysis,people determine the single bucket excavator-mobile, which is crusherconveyor belt conveyor-dumping machine pattern mining technology.For large open pit mine Wei Jiamao,a semi continuous process system should adopt the large equipment,and has the advantages of low investment.The paper also presents combined step by semi continuous mining process, operation mode and the mining procedure. The semi continuous process layout scheme of mining method,composite coal seam and haulage system accordingly.The adhesive tape machine "fan moved equipment" has specific transfer method, which reduces the cable hopper car in the shift process of walking times,and improves the transfer efficiency.And it proposes the present semi continuous mining technology problems and related solutions. With the development of modern science and technology and raise of large-scale manufacturing industry equipment, modern opencast mining technology which sign is mining process of continuous and integrated production will be developed rapidly.This research not only provides the scientific basis for technology for Wei Jia Mao two mining area,but also provides an important reference value for the design and implementation of other similar engineering of open coal mine.Therefore,the mining technology that is studied with the scientific method has practical significance.