Study On Scheme Of Surface-Underground Unite Mining In Shengli No.2East Surface Mine

The scale of the first-stage of Shengli No.2East surface mine is10.00Mt/a, and the scale of second-stage will be newly added10.00Mt/a.The national development and Reform Commission authorized the second-stage of Shengli No.2East surface mine by the document of.In September1,2007, Shengli No.2East surface mine started construction; and in June28,2010, the first-stage of project was completed and accepted by National Energy Bureau. At present, the second-stage of the project is under construction, according to the preliminary design, the second-stage of the project had an additional amount of capital works152Mm3based on the first-stage, originally planned to be completed in2012, and at the beginning of2013handover of production. But by the influence of geology condition changing of fault southward, the stability problems of south slope, semi-continuous stripping system can not be arranged, south slope landslide overbites large amount of coal, and coal quantity is difficult, that the production target is hard to reached.At the same time, the proportion of No.4coal is large at the beginning of production, higher cost caused by the semi-continuous system is not put into use, the situation of production and management of is not optimistic.In order to change the current passive situation of production and management, this paper presents the scheme of surface-underground unite mining. And Subterranean Coal Mine has advantage of less investment, low cost, quick effect, it can effectively improve the current production and management situation of the mine.