Graphite Deposit mining

Graphite Deposit mining conditions is generally simple - medium complexity . Crystalline graphite deposit is generally suitable for open pit mining , the majority may hillside open-pit mining , the ore body is located above the local base level of erosion , most of the bare surface topography is conducive to natural drainage , ore and rock of stability is better, generally no thicker bad engineering geological phenomena such as weak layer , a small amount of water is expected to pit Chung , simple mining hydrogeological conditions ; minority crystalline graphite deposit in local base level of erosion due to the orebody below requires the use of open-pit mining depression , some deposit near surface water bodies affected , mining conditions is relatively complicated. Most crystalline graphite ore deposit due with stone and roof stripped interior volume, stripping ratio of 1:1 to 6:1. Crystalline graphite deposit weathered zone thickness is generally less than 50m, the primary ore weathering conducive mining, chemical composition changed little. Aphanitic graphite mine generally suitable for underground mining , small ore body thickness , shape complexity , texture soft, poor stability of the roof and floor rock , mining tunnel water inflow is not expected , deposit engineering geological medium hydrogeological conditions , usually adit and inclined to explore the use of hierarchical caving mining. Obviously, resource tax function is "to adjust resources differential income", it "reflects the scarcity of resources" is not detached. "Adjusting the resource differential income" simple explanation, that a mineral resource occurrence conditions good, shallow, convenient transportation, easy to exploit, and low cost, the state levy more taxes and more; Conversely, resource poor ore occurrence conditions B , buried deep, blocking traffic, difficult mining, high cost countries less tax levy point. This is done so that "fat meat" accounted for less pay less, so that "gnawing on a bone" to get the point support, to avoid the development of enterprise resource conditions due to differences too "uneven quality" mining rights to promote fair competition, so that mineral development to achieve "reasonable and effective" purposes. Under the guiding ideology, mineral resource tax based on different factors, different regions, different conditions, such as design resources, occurrence of different tax rates. Such as coal, levying the lowest rates and the highest tax rate difference of 8 times; Again rock gold resource grade of 7, the minimum tax rate and the highest rate of difference of 2 times.