(T1d2) and the lower section (T1d3-1) of the third section of the Triassic Lower Ordovician Daye Formation are composed of medium-thin layered limestone and thick layer of limestone (Tlj2) in the Lower Triassic Jialingjiang Formation is composed of medium-thick layered limestone. The interlayer between I and II is the second member of the Daye Formation (T1d3-2) with dolomitic limestone, dolomitic limestone and Jialingjiang Formation (Tlj1) dolomite thickness 121.2 ~ 1890m.
The internal structure of the deposit is simple. The ore body is layered and has a slight fluctuation in the direction and direction. In the local section, see the small folds or flexures. The overall production of the ore strata is consistent with the formation of the strata. The inclination of the north is generally between 35 and 45 °. The distribution of ore deposits in the area is continuous and stable. I layer thickness 200.20 ~ 269.60m average thickness of 235.37m, to extend the extension of 3500m. Ⅱ ore layer thickness l94.40 ~ 280.20m, the average thickness of 228.60m, to extend 3300m.
Mine mining program steps
First mining from the cement plant closer to the II ore layer, mining in the II mining to the minimum mining height of 80m after mining I ore layer. North stope (II ore layer) the highest mining height of 260m, the proposed broken station elevation l40, the relative height difference l20m. The mining area is composed of four relatively independent hills, which is suitable for highway development and automobile transportation system.
The highest mining elevation is 275m, the minimum mining height is 80m, and the mining height is 195m. Compared with the comprehensive technical and economic comparison, the slanting-chamber crushing-aditizing-belt conveying system is reasonable. Slip well elevation 275 m, diameter 6m, total depth of 172m. Adjacent length 710m (2 in total) New tape length of about l090m.
When the mine is put into operation, the initial working face of the north stope is arranged in the middle and eastern part of the II ore body, and two working surfaces are used for highway development and motor transportation. In the factory construction of the first two 5000td production line and then in the ore body on the west side of the mountain layout of a face through the validation. The face arrangement can meet the requirements of mine production capacity.
The main advantage of the scheme is that the initial distance of the mine is short and the annual operating cost is low. The drawback is that the mining area is less in the early stage of production and the descending speed of the mine project is faster than that of the northern mining area. The development of the transport system.
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