Through field investigation and test, the distribution characteristics, formation conditions, and starting mode of the typical mine debris flow in Tieshanzhang Mining Area were studied, and the density, flow velocity, flow, and other dynamical parameters of the debris flow were calculated based on the dynamic principle, which provided a reliable basis for the design of debris flow prevention engineering. The results showed that the debris flow was currently in the development stage, belonged to the rainstorm gully-shaped, high-frequency, non-viscous, mining slag debris flow, and its starting mode was collapsing-jamming-bursting type. From the topography point of view, large relative height difference of the gully basin, steep terrain, and large longitudinal slope of the gully helped the formation and starting of the debris flow; from the source point of view, arbitrary discharge of large-scale mining waste provided a rich loose solid source for the debris flow; heavy rainfall brought by landing of typhoon was a trigger for the debris flow.
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