| The Yuandian No.2 Coalmine was chose to be the subject investigated in this article, systematically collected Yuandian No.2 Coalmine in production and geological data in construction period.On the basis of magmatic rocks and coal material composition combine Geological exploration with mine production to study the characteristic of magma rocks and the influence of coal seam characteristics.Found North-East trending fault and the North-South trending fault that complexly control of the distribution of magmatic rocks within the study area. And in the middle of the mine Gao chang ying zi fault, East Yuandian fault and West of F14, F12 fault is the main channel of magmatic intrusion.The Magmatic rocks of intrusion coal seam are mainly diabase.Mostly rock as dykes, sills and dikes and other forms intrude Coal middle or roof and floor.Research area has 3 main coal seam, because the No.10 coal-seam has large seam roof sandstone, and coal formation was also affected by channel erosion leading to increased coal ash, strength than the other seam.So drilling exposed fewer entry points by No.10 coal-seam.No.3 coal-seam has the less thickness, so has no entry points.Because of the large thickness of No.72 coal-seam cause significant influence by the intrusion of magma, about 21% the original seam under the influence of magmatic intrusion become into natural Coke or have been eroded. Between natural Coke thickness distribution and coal thickness distribution bhavethe growth and decline of relationship to each other,According to the thickness of natural coke for coal exploration in magmatic intrusion area and provide scientific basis for roadway drivage. |
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