在四川省芦山县大川镇黑水河，成都军区第13集团军官兵在实施爆破作业（4月29日摄）。当日，四川省芦山县大川镇突降大雨，受芦山地震影响形成4000余立方米堰塞湖的黑水河排险施工现场再次面临山体崩塌、巨石堵塞河道的危险。为防止堰塞湖险情加剧给下游群众造成生命财产损失，成都军区第13集团军抽调官兵紧急开展爆破河内巨石、疏通河道、疏散下游群众工作，防止次生灾害发生。新华社发（高效文 摄）     Forth county okawa town black river in sichuan province,The chengdu military command 13th army officers and soldiers in the implementation of the blasting operation(April 29 was taken).On the day,Forth county okawa town sudden heavy rains in sichuan province,Forth the affected by the earthquake, to form more than 4000 cubic meters of the lake mountain collapses again black river zone the construction site/Boulders blocked rivers.In order to prevent the lake danger intensified to downstream caused losses of lives and property of the masses,Chengdu military region army from 13 soldiers emergency in rock blasting in Hanoi/Dredge the river/Evacuation of the downstream mass work,Prevention of secondary disasters.The xinhua news agency发(Gao Xiaowen perturbation)

    在四川省芦山县大川镇黑水河，成都军区第13集团军官兵在实施爆破作业（4月29日摄）。新华社发（高效文 摄）     Forth county okawa town black river in sichuan province,The chengdu military command 13th army officers and soldiers in the implementation of the blasting operation(April 29 was taken).The xinhua news agency发(Gao Xiaowen perturbation)

    在四川省芦山县大川镇黑水河，成都军区第13集团军官兵在爆破后清理河床（4月29日摄）。新华社发（高效文 摄）     Forth county okawa town black river in sichuan province,Chengdu military region army officers and soldiers after blasting 13 clean up the river(April 29 was taken).The xinhua news agency发(Gao Xiaowen perturbation)