A powerful gas explosion struck the South Korean city of Daegu in\n1995, killing 100 people.<\/p>\n
According to Yonhap, the disaster occurred at 7.52am on 28 April 1995\nat the construction site for Section 2 of Daegu Subway Line 1, directly\nin front of Yeongnam Middle School in Sangin-dong, Dalseo-gu, Daegu.<\/p>\n
The blast was triggered by city gas leaking from a nearby building\nconstruction site. The gas flowed into and accumulated in the\nunderground section of the subway construction site.<\/p>\n
The incident killed 100 people and left 143 with serious or minor\ninjuries.<\/p>\n
The damage was extensive. A total of 91 vehicles, including city\nbuses, were destroyed, as were 74 nearby buildings and homes.<\/p>\n
The day before the explosion, construction subcontractor Pyojun\nDevelopment Co.\u00a0began grouting on an eight-metre-wide access road south\nof the Daebaek Plaza Sangin branch project site. It drilled 22\nholes.<\/p>\n
Drilling resumed using two machines. One drill rod pierced a buried\n100-millimetre-diameter medium-pressure city gas pipe at a depth of 1.7\nmetres, creating a hole 80 millimetres wide.<\/p>\n
High-pressure city gas, at 4.2 kg\/cm\u00b2, escaped rapidly, seeped\nthrough the ground and entered a 400-millimetre-diameter stormwater\ndrain 1.4 metres from the leak. It then travelled 77 metres through the\ndrainage system and reached the underground area of the subway\nconstruction site.<\/p>\n
About 40 minutes after the leak began, the accumulated gas ignited\nfrom a source that has not been identified. The resulting blast occurred\nwhile around 60 workers were at the site.<\/p>\n
Investigators concluded that the explosion was caused by the drilling\nerror. The drilling had also been carried out without an official road\nexcavation permit from the authorities.<\/p>", "url": "https:\/\/jawawa.id\/newsitem\/south-koreas-deadliest-gas-explosion-began-with-a-drilling-error-1792914682", "image": "" }, "sponsor": "Okusi Associates", "sponsor_url": "https:\/\/okusiassociates.com" }