嵩山井田二_1煤层厚度变化规律及其影响因素分析

Analysis on Changeable Law and Influential Factors of Thickness of Ⅱ_1 Coal seam in Songshan Mine Field

结合生产矿井相关地质资料勘探成果,利用数理统计方法确定:嵩山井田内二1煤层属较稳定至不稳定类型。二1煤层厚度变化具一定规律性,且受聚煤环境和后期构造制约,即远离潮道砂体的碳酸盐台地环境相对稳定,较早地形成了潮坪沉积,煤层相应较厚,而薄煤带多分布在潮道砂体之上。NW向断裂的剪切扭动及重力滑动构造的叠加作用,导致二1煤层厚度重新调整。滑动构造的前缘部位煤层相应较薄,向北于滑动构造的影响带、正常带煤层较厚,并呈EW向展布,于嵩山断层附近,薄厚煤带呈NW向展布。

Based on the results of manufacturing mine and exploration,and with the use of mathematical statistics,the Ⅱ1 coal seam in Songshan mine field can be definite to belong to stability to instability types in this paper,the change of the thickness of Ⅱ1 coal seam has regular rules, and is restricted by coal-assembling environments of and later stage structures. This can be explained that,the carbonate mesa far away from tide-path sand-body, the environment is rather steady, and formed tide-lawn deposit firstly, and the thickness of coal seam is rather thick correspondly. While the thin coal-beh mainly distributed on the sand-body of tide-path. Later on,the overlying action of shearing of the north-west-orientioned fractures and gravity slide structures leads to a readjust of Ⅱ1 coal seam. The thickness of coal seam on the leading edge of slide structures is rather thin, on the contrary, in the normal regions and the regions north or affected by the slide structures,the coal seam is rather thick. This indicates a distribution tendency along east-west direction,and in the area near the Songshan fault,the thin coal-beh distribute along the direction of north-west.