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研究单一煤层和煤系地层煤级参数随埋深的演化,显示单一煤层煤级参数与煤层埋深相关性很低,离散度较高;同一勘查线上,靠近东部边界钻孔单位深度内煤层挥发分产率下降的速率大,变质程度高;不同勘查线数据对比显示,北部变质程度更高。结合区域重力场和航磁异常平面等值线图,发现煤层在受深成变质作用仅达到气煤阶段的基础上,又叠加了沿着断裂面上传到上部地层的隐伏岩体热量,地温梯度发生改变,使煤层变质程度增高。
The study of single coal and coal strata with the evolution of the depth of the coal rank parameters, shows a single coal rank coal seam parameters and the correlation is very low, the higher the degree of dispersion; the same exploration line, near the eastern border drilling units within the depth of coal Volatile yield rate of decline, the high degree of metamorphism; different exploration line data show that the higher degree of metamorphism in the north. Based on the contour maps of regional gravitation and aeromagnetic anomalies, it is found that the coal seams, on the basis of deep metamorphism only reached the stage of coal and gas, superimposed the heat of the hidden rock mass up to the upper strata along the fracture surface. The geothermal gradient Changes have taken place, so that coal seam deterioration increased.