9 coal seam hosting pattern,coal-forming paleogeography and its evolution,and illuminated the control action of depositional environment toward coal seam thickness.

• 以勘探资料为基础,对该区9号煤层赋存规律、成煤古地理及其演化进行了分析研究,阐述了沉积环境对煤层厚度的控制作用。