泥石流是高密度、高粘度块体流体,是碎屑物(包括粘土)和水的混合物。笔者在“中国东部中生代断陷盆地沉积、构造演化与聚煤规律”研究工作中,接触了大量的冲积扇沉积物。泥石流是冲积扇的三种主要沉积类型(泥石流沉积、扇面河道沉积、漫流沉积)之一。大量事实证明,泥石流的发生、发展对断陷盆地的聚煤作用 Debris flow is a high-density, high-viscosity block fluid that is a mixture of clasts (including clays) and water. In the research work of “sedimentation, tectonic evolution and coal accumulation law of Mesozoic rift basin in eastern China”, the author contacted a large number of alluvial fan sediments. Debris flow is one of the three major sedimentary types of alluvial fans (debris flow deposition, fan channel deposition, and flood deposition). A large number of facts have proved that the occurrence of debris flow, the development of faulted basin coal accumulation