The construction of the main gas pipeline in Changsha was cut off by thousands of citizens for emergency evacuation.

Xiaoxiang Morning Post
On the afternoon of June 23, August 09, 2004, a gas pipeline was cut off during the construction of an engineering team in the east pond of the Extension Project on Shaoshan South Road in Changsha. The whole east pond was filled with a strong coal smell. Thousands of people were evacuated in an emergency, and the two fainted. Some people experienced dizziness and vomiting. According to reports, at that time the gas concentration was extremely high, even a small Mars will bring a shocking explosion.
Thousands of citizens evacuated urgently
At 02:15 P.M. on June 23, August 09, an engineering team constructed a gas pipeline in the South East pond of the Tui site in Shaoshan South Road, Changsha. The gas was sprayed out. Then, the construction team staff quickly ran out of the Construction fence and motioned nearby people to evacuate North immediately. More than 10 shops are open near the dug gas pipeline. Due to the hot weather, all the shops are powered on air conditioners, which are in a semi-closed state. The leaked gas quickly forms a high concentration.
The common pharmacy is about 10 meters away from the incident. According to Mr. Zhang, who was buying medicine at the time, he did not know what happened outside. Suddenly, the pharmacy staff told him and other customers to evacuate the mall quickly. Another citizen said that when he ran north to a safe area hundreds of meters away from the incident, he found at least thousands of people who were evacuated urgently.
Two salespersons from the common pharmacy fainted during the evacuation and were quickly taken to a nearby hospital for treatment. A pharmacy staff member said the two may be slightly poisoned by gas, and some people passing through the road also experienced dizziness and vomiting.
Thrilling gas concentration approaching Explosion Limit
As the smell of coal is getting stronger and stronger, even a small spark will bring about a shocking explosion. No lighter can be used in places not far from the gas leak point, and several shops near the scene can no longer enter. Peng Zhenyu, head of the Singapore gas repair team, said he estimates that the gas concentration in these stores is close to the explosion limit, and a slight flash may trigger all the store explosion.
Affected million households, "disconnected"
At 02:35 P.M., the repair team of xinao gas company, who received an alarm, arrived at the scene. They immediately shut down the main valve of the gas pipeline, and the gas that keeps popping out is under control.
The total valve was shut down for about five minutes, and the smell of coal filled with the East pond gradually dispersed, but the smell of coal in nearby shops was difficult to discharge. The General pharmacy is forced to stop its business, and customers are all blocked by staff. A staff member said that the gas concentration on the second and third floors of the pharmacy is very high, and the two exhaust fans are used at the same time, and the gas cannot be quickly discharged. Other shopkeepers said that although there was no smell on the road, the smell in the facade was still very strong. According to a famous shopkeeper, if a gas explosion occurs in a place with a relatively high population density like Dongtang, the consequences would be unimaginable.
According to Peng Zhenyu, the main gas pipeline that has been cut off has caused a wide range of gas stop from yuhuating to the east pond and the first line of chiling road. The gas usage of more than households is affected.
The accident pipeline has been dug 13 times
Peng Zhenyu said that the broken gas pipe was a new and old gas pipe joint, and the gas pipeline was cut off 13th times due to the extension and reform of Shaoshan South Road. It is understood that the dug gas pipeline is in the form of "S", and the repair work is only a small pit of 3 m². At 06:20 on the evening of June 23, August 09, After urgent repairs, the gas supply of the dug pipe was resumed.
The person in charge of the construction work headquarters of Shaoshan South Road Development and Reform Project quickly arrived at the site and coordinated with the gas company emergency repair personnel to prevent such incidents from happening again.