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1984年6月不列颠哥仑比亚的凯里(Cayley)山发生了一大型岩石滑坡和泥石流,约3.2×10~6m~3的火山物质以35m/s的速度向阿维兰迟(Avalanche)沟运动了2km,堵塞了阿维兰迟沟与塔比德(Turbid)河的汇合处。滑坡坝的溃决造成了极快的泥石流,泥石流伴生的阵风速度达到34m/s,造成超高,把石块和木头抛向空中,拔起树木,泥土溅到树上高达16m。泥石流把运木材道路的桥和引线推到接近塔比德河口处,巨浪拦阻了斯垮米希(Squamish)河,并把大量沉积物带到该河中。从岩石滑坡的后壁上采取湿的凝灰岩的单轴抗压强度是1.0～1.5MPa,约为干试样强度的三分之二。湿的凝灰岩顺层面的内摩擦角为30°,湿化耐久性系数是26％。软弱的凝灰岩形成了1984年凯里山岩石滑坡的破坏面,湿化石屑形城了泥石流。凝灰岩、以高角度相交的陡而窄的沟谷、大的降水量、河谷中的冰雪堆积综合造成了凯里山西坡的严重灾害。
In June 1984, a large rocky landslide and debris flow occurred in the Cayley Mountains of British Columbia. About 3.2 × 10 ~ 6m ~ 3 of volcanic matter was late to Avalanche at 35m / s. The ditch moved 2km, blocking the confluence of the Aweland Trench and the Turbid River. The collapse of the landslide dam caused an extremely rapid debris flow. The gust velocity associated with the debris flow reached 34m / s, causing it to be extremely high. Throwing stones and wood into the air, pulling up the trees, the soil was splashed into the trees up to 16m. Debris flow pushed the bridges and leads of the timber roads close to the mouth of Tabit, where waves blocked the collapse of the Squamish river and brought massive sediments to the river. The uniaxial compressive strength of wet tuff taken from the back wall of the rock landslide is 1.0 to 1.5 MPa, which is about two-thirds of the strength of the dry specimen. Wet tuffs had a built-in internal friction angle of 30 ° and a wet endurance coefficient of 26%. The weak tuff formed the destruction surface of the rocky landslide in 2014 in Mt. Tuff, steep and narrow valleys, high precipitation, and snow and ice accumulation in the valley caused by the high angle caused serious disasters on the western slope of Mt.Kaili.