Study on Sedimentary Environment of Taiyuan Formation and Seam Comparison in Jinhaiyang Mining Area

Due to Jinhaiyang Mining Area is a new mining area based on the integration of the previous small mines in Shuozhou, in order to solve inconsistent sea m numbers in several mining blocks and less rigorous comparison on seams, from the sedimentary environment of the study area, the lithology features and trace elem ent features of the coal measures in the mining area, a lithofacies palaeogeography map was drawn and the sedimentary cycle in the mining area was divided.Taking th e above stated as the criterion, the lithology mark, property parameters and logging curve features were applied to effectively divide each seam and to the tracing comp arison.The study held that Taiyuan Formation in the mining area was mainly divided into three sedimentary cycles.The first cycle was the tidal flat facies at the bottom 0 f Taiyuan Formation and there was a stable No.11 seam deposited.No.11 seam was in a tendency of thick in west, thin in east, north in thick and south in thin.The secon d cycle was a lagoon tidal flat facies and there was a full stable No.9 seam in the mining area.Under the influences of the provenance direction and the marine transgre ssion and regression direction, No.9 seam was thin in west and think in east and spreading in north and east directions.The third cycle was river control shallow water d elta plain (under water) facies at the top of Taiyuan Formation and there was a seam with multi sedimentations and uneven thick and thin thickness.