Characteristics Of Coal Petrology And Geochemistry Of Permo-Carboniferous Period In Lingshi Mining Area Of Huoxi Coal Field

LingShi Huoxi coal mining area coal-bearing series are mainly Permo-Carboniferous system Taiyuan and Shanxi Formation, and minable seam buried in shallow mining area and coal quality is excellent and the main coking coal in Shanxi Province. Predecessors had study Huoxi coalfield structure characteristics of the carboniferous-Permian deposition, conducted in-depth study, but not the coal petrology, coal geochemistry characteristics research. Based on coal geology, coal petrology, geochemistry and coal, coal and other professional theoretical knowledge as the foundation, using the macro and microscopic observation of anthracology, X-ray diffraction (XRD), inductively coupled plasma mass spectrometry and other methods, through the analysis of the coal rock composition, combined with the industrial analysis parameters and test results, exploring the major elements and trace elements in coal geochemistry characteristics, revealing the state of constant and trace elements in coal, and to understand the coal-bearing rock series associated elements enrichment characteristics, within the mining area coal e carbon efficient development and utilization to provide scientific theoretical basis, it is concluded that the following understanding:1. In LingShi coal mining area, No.1 coal is high caking coal, low moisture, low-medium ash content, medium volatile matter, in a extra low-low sulfur content cooking coal; No.9 and 10 are the medium caking coal; No.9 coal is extra low-low moisture, low ash content, medium volatile matter, in a high sulfur content cooking coal; No.10 coal is low moisture, low-medium ash content, medium volatile matter, in a high sulfur content cooking coal.2. In LingShi mining area, No.1 coal macroscopic coal-type is light type coal, No.9 and No.10 coal are semibright coal. Coal and rock organic maceral components of No.1,9 and 10coal are given priority with vitrinite, idler plastid times, with less exinite contents; Inorganic macerals are mainly about clay minerals and pyrite. The original coal swamp environment of No.1 coal is about the stranded damp-overlying water forest swamp facies, No.9 coal is about the stranded deep overlying water forest swamp facies and flow of tidal flat-lagoon swamp facies, and No.10 coal is about flow of tidal fla-lagoon swamp facies and stranded tidal flat-lagoon swamp facies.3. In LingShi mining area, the occurrence of SiO2 and Al2O3 of No.1,9,10 are mainly about silicon aluminium acid salt content combination; The occurrence of CaO and P2O5 of No.1 should be related to carbonate mineral or phosphate mineral; Fe of No.9,10 coal occur in the pyrite, which is the product frequently caused bytransgressive-regressive of the coal environment.4. In LingShi mining area, Li, Be, Bi, Pb, U and Mo trace element (in No.1 coal), Mo, Bi, As, Sb, W, U, Cd and Be trace elements (in No.9 coal),Mo, As, Bi, Sb, W, U, Li, Cd, Pb, Be, T1 and Th trace elements (in No.10 coal) are enrichment or relative enrichment of elements; Mo, As, Sb, U, Cd, Pb, Be, T1, Th elements (in No.1,9 and 10 coal) are the harmful elements in coal.