1994－04－30四川省武隆县鸡冠岭滑坡→崩塌→碎屑流→堵江灾害链

A HAzARD-CHAIN OF LANDSLIO→COLLAPSE→DEBRIS FLOW→RIVER STOPPAGE IN WULONG COUNTY,SICHUAN PROVINCE ON APRIL 30,1994

１９９４－０４－３０的１１：４５，四川省武隆县兴顺乡核桃坪村境内乌江左岸鸡冠岭一龙冠嘴（１０７°２９′２７″Ｅ，２９°２８′０６″Ｎ）发生了特大型滑坡→崩塌→碎屑流→堵江灾害链，其碎屑堆积物方量５３０万ｍ￣３．崩塌滑坡发生区海拔５００─８５０ｍ。崩塌滑坡物质解体、破碎后，又呈碎屑流作顺坡运动，其中３０万ｍ￣３泻入乌江（江面海拔１５０ｍ），堵断江流时间达３０ｍｉｎ；这次灾害链致死４人，失踪１２人，伤５人，造成直接经济损失近千万元。发生区后缘坡体上还有地表裂缝在不断扩展，潜在性灾害威胁继续存在。

At 11:45 On April 30,1994, a hazard-chain of lands1ide → collapse→debris flow→riverstoppage occurred at Jiguanling─Longguanzhui(107°29′ 27″E,29°28′06″N),located on the leftbank of Wujiang River in Wulong Couuty , Sichuan Provin ce, The volume of debris flow wasabout 5.3M(m)￣3。The altitude of the occurring area is at 500─800m。 After resolving,the debris moved alongthe slope。0. 3M(m)￣3 of them put into Wujiang River and 0.1M(m)￣3 of them piled below theriver level,The time of river stoppage lasted 30min。This hazard-chain caused 4 persons dead,12 ones lost and 13 wounded, The economic lossesare nearly 10 M yuan(RMB)。There are cracks which have been developing on the beck of the occurrmg area,The potentialhazard still exists。Some countermeasures against hazard as follaws:1. clearing off unstabe rock mass;2.a longmeasuring and predicting for the cracks on the ground;3. setting up catch structure along the roadbesltie the river and rationaly plan ning waste residue of coal so that prevent sliding mass turninginto debris-flow;4.the effect of explod to unstable rock should be lessen