井工转露天开采联合开拓的可行性研究

根据井工转露天开采矿山的特点,对某矿露天开拓与井工开拓方式进行研究,提出了井工转露天矿山端帮联合开拓和坑底联合开拓2种方式,并结合矿井实际生产地质条件对矿井扩建可行性进行了论证,采用相对投资回收期对各种开拓方式从投资与生产成本两方面进行了经济效益评价,优选出了适合矿山由井工转为露天开采的露井联合开拓方式。结果表明:端部联合开拓符合某矿井工转露天开采矿山的生产实际,既能充分利用井工矿现有生产及运输系统,降低建设投资,加快露天矿建设速度,又可扩大矿山开采规模和提高矿产资源开发的经济效益,为建设高产高效矿山提供支撑,对于我国煤炭资源开发过程中资源条件适合的矿山实施井工转露天开采具有现实意义。

Feasibility Study on Combined Development for Mining Converted from Underground to Surface

According to the characteristics of mining converted from underground to surface,we studied the open-pit and underground developments in one mine,and put forward two combined developing forms in the mine with its mining converted from surface to underground,including the end slope combined developing and pit bottom combined developing.Additionally,combined with the actual mine production geology conditions,we demonstrated the expansion feasibility of the mine,and used relative payback period to evaluate the economic efficiencies of different developing forms from the aspects of investment and production costs,then selected out the combined developing method which is suitable for the mine converted from surface to underground mining.The results show that the end slope combined developing is accord with the production practice of the mine,which can not only make full use of the exiting production and transportation systems of the underground mine,reduce the construction investment,and accelerate the construction speed of open pit,but also can expand the mining scale and improve the economic benefits of mineral resource development.Thus,this developing form can provide support for the construction of high yield and high efficient mines,and has practical significance for the mines converted from underground to open-pit mining in the development process of China’s coal resources.