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济宁二号井田3下煤层顶板沉积属上三角洲沉积．分流河道、决口扇、决口河道非常发育，由此构成了以弯曲的分流河道为主体，配置以决口扇、决口河道及分流问湾的沉积植架。通过对井下大量揭露巷道的实际观测及运用现代河流沉积理论的推演，找到了以水道规模和水道形态为主的影响3下煤层冲刷的诸因素，并从冲刷带形态、出现部位和冲刷深度变化趋势等方面总结出了该井田3下煤层的冲刷规律。
The top coal seam roof deposition in Jining No.2 Minefield belongs to the Upper Delta. The distributary channel, the crevasse channel and the breaching channel are very developed, which forms the sedimentary frame with the curved distributary channel as the main body and the configuration of the crevasse channel, the breaching channel and the diversion bay. Through the actual observation of underground tunnels uncovered and the application of the modern river sediment theory, the factors of water scouring under the influence of watercourse size and water channel morphology are found. From the morphology of the scouring belt, the change of site and scour depth Trends and other aspects summed up the mine field 3 under the law of erosion.