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据知,1967年曾在大坝前面作过O.2公斤炸药量的水中爆炸,当时引起大坝振动严重,坝后厂房内响声大,影响运行人员的工作和安全发电。现距大坝400米远的隧洞进口水下爆破施工作业。
It is known that an explosion in the water of 0.22 kilograms of explosives had been made in front of the dam in 1967. At that time, the dam was severely vibrated and the noise in the factory building behind the dam was disrupted, affecting the operation of personnel and generating safe power. 400 meters away from the dam tunnel import underwater blasting construction operations.