The selection of initial trench position of Dawan Coal Mine
In order to develop the engineering construction of Dawan Coal Mine in a reasonable manner,bring it into production as soon as possible and improve the economic benefits,two options for the initial trench location are proposed,and the impact of the amount of mine construction,investment in mine construction,balanced stripping ratio and other indices on the different options are analyzed.The results show that in the first scheme,the outcrop in the north of the stope is trenching along the coal seam,the tendency is advancing,the mine construction amount is small,the mine construction investment is small,the equilibrium stripping period is longer than the equilibrium stripping period,but the equilibrium stripping ratio is large.The second plan from the west of the stope along the coal seam inclined to pull the ditch,towards the promotion,the mine construction project is larger,the mine construction investment is larger,the equilibrium stripping than the equilibrium period is shorter,the first phase of the equilibrium stripping is larger,the second phase of the equilibrium stripping is smaller.If the construction volume of the Project 1 mine is expanded,the equilibrium stripping ratio could be reduced,but the investment would be increased.After a comprehensive analysis of the two schemes,we determine that the first scheme is more suitable without increasing the amount of mine construction.
first mining areatrench positionequilibrium stripping ratioequilibrium periodmining construction quantity
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