Southeast Asia Information Port News (www.dnyxxg.com) – On February 7th, the provincial investigation and assessment team for the "2.8" landslide disaster in Junlian County, Yibin City, Sichuan Province, released its investigation and assessment report to the public. Experts determined that the landslide was a complex natural disaster caused by continuous infiltration of mudstone from a steep slope due to prolonged rain, leading to a sudden high-altitude landslide and subsequent long-distance debris flow.
At 11:50 AM on February 8th, 2025, a sudden landslide occurred in Group 2 of Jinping Village, Mu'ai Town, Junlian County, Yibin City, resulting in 10 deaths, 19 missing persons, and 2 injuries, with direct economic losses of 6.0204 million yuan. Following the disaster, the Sichuan Provincial Government established a provincial investigation and assessment team in accordance with the law. Through various technical means and on-site investigations, the team reviewed the disaster process, identified the causes, pinpointed shortcomings, and proposed improvement suggestions.
The investigation revealed that the landslide was located in the northern part of the Wumeng Mountains, at the southern edge of the Sichuan Basin, and in the transitional zone between the Yunnan-Guizhou Plateau. The terrain is complex and steep, and the Feixianguan Formation within the landslide area is classified as a hazardous stratum. The rear edge of the landslide area has an elevation of 1151 meters, while the front edge of the deposition area has an elevation of 710 meters, a relative elevation difference of 441 meters. The sliding distance was approximately 1.2 kilometers, and the total volume of the deposited material was approximately 682,000 cubic meters. During the disaster, the high-altitude rock mass subducted at high speed, impacting and scraping along its path, and was obstructed and deflected twice, exhibiting a significant amplification effect and chain-reaction characteristics.
Regarding the causes of the disaster, the report clearly states that the steep terrain provided favorable spatial conditions for the disaster, the fragile geological conditions were an intrinsic factor, long-term weathering and unloading exacerbated the loosening of the rock mass, and continuous rainfall was the main contributing factor. Comprehensive investigation showed that coal mining activities had a relatively small impact on the surface, and so far, no direct link has been found between coal mining activities and this landslide.
Furthermore, the report also pointed out that due to its high-altitude, remote location and chain-like nature, this disaster presented challenges such as difficulty in identifying hidden dangers and controlling risks. It summarized lessons learned, including a weak foundation of extreme thinking, inaccurate hazard identification, insufficient grassroots disaster prevention capabilities, and the need to improve emergency response capabilities. Targeted improvement measures and suggestions were also proposed. (End)
