The investigation report on the "March 30" large gas explosion accident on Chongqing Wanzhou Enguang Expressway was released

Xinhua News Agency, Chongqing, November 6 (Reporter Zhou Wentao) On the 6th, the Chongqing Municipal Emergency Management Bureau released to the public the investigation report on the "March 30" large gas explosion accident in the A2 contract section of the Wanzhou-Kaijiang section of the Chongqing-Wanzhou Enguang Expressway. The accident investigation team determined that the accident was a major production safety accident in which the construction unit shut down the fan equipment for a long time, which caused a large amount of gas to accumulate in the left hole at the entrance of the Tiefengshan Tunnel, and then took the risk to organize a resumption of work without approval and the gas concentration exceeded the limit, causing sparks in the non-explosion-proof cables energized in the tunnel to cause a gas explosion.

At about 15:00 on March 30, 2026, a large gas explosion occurred in the left hole at the entrance of the Tiefengshan Tunnel in the A2 contract section of the Wanzhou-Kaijiang section of the Enshi-Guangyuan National Highway in Wanzhou District, Chongqing City, causing 5 deaths, 10 injuries, and direct economic losses of 17.922545 yuan.

The investigation team believes that this accident exposed four outstanding problems, including a serious lack of intrinsic safety of the enterprise and the long-term existence of major accident hazards; the enterprise ignored regulatory instructions and took risks to organize resumption of work in violation of regulations; the investigation and management of hidden dangers of participating units was a mere formality, and the dual prevention mechanism was idle; the supervision responsibilities at the municipal and district levels were not fulfilled and coordination was insufficient.

The investigation team put forward suggestions for handling the relevant units and responsible personnel. Four people, including Han Moumou, the project safety officer of the construction unit, and Li Moumou, the executive deputy project manager of the construction unit, were directly responsible for the accident. Their actions were respectively suspected of the crime of major liability accidents and the crime of organizing others to violate regulations and risky operations. It was recommended that criminal liability be pursued, and administrative penalties be imposed on the units and responsible personnel responsible for the accident. During the investigation, it was discovered that there were clues and relevant materials regarding the performance of duties by public officials of the Wanzhou District Transportation Commission and the Municipal Transportation Commission, and it was recommended that the matter be transferred to the Disciplinary Inspection and Supervision Commission for investigation and handling. For clues and related materials that were found to be problems in the performance of duties by management personnel of the construction unit group and construction unit managers, it was recommended that the matter be transferred to the relevant disciplinary inspection departments for investigation and handling.