To be on site during the construction of the underground pipeline survey in advance to avoid during construction of the pipeline damage . April 21 afternoon , a small excavator in the Daqing Shan Road near the intersection with the sound of a construction site , accidentally plug an underground gas pipeline dig , blast out of more than 10 meters high, Hong Kong and China gas company workers rushed to the scene to block the pipeline leak .
At 16:30 on April 21 , the reporter came to the scene , I heard " Chi Chi " sound, a road south of the water horse enclosed within the site , a powerful blast straight into the sky , there are more than 10 meters high , blast mixed with dust. One large and one small leak point two excavators parked in the distance. To prevent accidents , the police station around the ovary cordoned off . Towngas roadside parked car repair company , the staff is preparing for pipeline leak plugging . Ovary police station told reporters , about 16:00 , they received a report that it has a natural gas leak at the site . They immediately arranged police came to the scene , and the implementation of alert in the range of around 20 meters , and reminded the public not to close the past .
A nearby shopkeeper told reporters , this place ready to engage in greening projects . 16:00 , he heard someone shouting in the shop , "Oh , the excavator will Waduan a natural gas pipeline ." He ran out to see it in front of a gas station mini-excavators " Chi Chi" emerge . According to Hong Kong and China Gas Company a repair personnel, after examination, is a 50 mm diameter gas main channel of the plug being gouged . In order not to affect the surrounding residents to use gas , they decided not to close the nearby valves repair. The staff first clean loess pipeline around the mouth screw top view pipeline have been destroyed.
16:40 , loess around the gas pipeline was clean and repair workers, TCC will wrap a new pipe joints with raw material in the pipeline after trying to twist his head , because out of the air waves, repair workers tried two or three times , before the plug completely screwed good . Subsequently , repair workers also used a large wrench , tighten the plug to ensure that there are no gas leaks .