结合相关理论、野外调查、统计分析、室内试验，综合分析砾石坡面土石流发生之机制。
Combining revelant theory, field investigation, the statistical analysis, the laboratory experiment, analysis initial mechanism of debris flow along gravel slope.
由于携砂液向地层的滤失以及通过筛管缝隙的流体质量交换，水平井砾石充填过程中冲筛、井筒环空两个流动系统均为复杂的变质量流。
During the process of gravel-packing in horizontal Wells, there are the filtration flow of the carrier fluid to the formation and the exchange flow through the screen slots.
蒋家沟泥石流内广泛分布级配宽广的砾石土，砾石土的力学性状对于泥石流的起动发生有重要影响。
There are gravelly soil distributed grain diameter widely in Jiangjia Ravine, the mechanical behavior of gravelly soil is important for initiation of debris-flows.
盆地西缘距蚀源区近，坡度陡，形成了重力流成因的砾石质水下冲积扇。
The western margin of the basin was close to the source regions and very steep, so that pebbly subaquatic alluvial fans were formed that were deposited from a gravity flow.
盆地西缘距蚀源区近，坡度陡，形成了重力流成因的砾石质水下冲积扇。
The western margin of the basin was close to the source regions and very steep, so that pebbly subaquatic alluvial fans were formed that were deposited from a gravity flow.
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