Core Insights - The successful completion of the first mountain tunnel of the Guozi Pass pipeline marks a significant breakthrough for the West-to-East Gas Transmission project, enhancing the overall safety and risk resilience of the pipeline system [1][2] Group 1: Project Overview - The Guozi Pass pipeline is a key energy infrastructure project located in the Ili Kazakh Autonomous Prefecture of Xinjiang, with a designed annual gas transmission capacity of 60 billion cubic meters [1] - The project involves the construction of a 32-kilometer long pipeline using a dual-pipe system, which will operate in conjunction with existing pipelines to improve safety [1] Group 2: Engineering Achievements - The project features four long-distance mountain tunnels, achieving multiple industry records, including the longest single excavation length of 6,612 meters and the largest cross-section size of 6,870 millimeters [1] - It is the highest tunnel project at an elevation of 2,005 meters and has the largest elevation difference of 324 meters, as well as the steepest slope of 10.61% [1] Group 3: Environmental Considerations - The project is located in an ecologically sensitive area with a forest coverage rate of 53% and is home to 146 species of terrestrial vertebrates [2] - To minimize environmental impact, the company has implemented optimized route design and innovative technologies, including a tunnel drainage treatment system and comprehensive dust control measures [2]

Core Viewpoint - The successful completion of the first mountain tunnel of the Guozi Pass pipeline marks a significant breakthrough for the West-to-East Gas Transmission project, enhancing the overall safety and risk resilience of the pipeline system [1][2]. Group 1: Project Overview - The Guozi Pass pipeline is a key energy infrastructure project located in the Ili Kazakh Autonomous Prefecture of Xinjiang, with a designed annual gas transmission capacity of 60 billion cubic meters [1]. - The new pipeline spans 32 kilometers and utilizes a dual-pipe system, which will operate in conjunction with existing pipelines to improve overall safety [2]. Group 2: Engineering Achievements - The project features four long-distance mountain tunnels, setting multiple industry records, including the longest single excavation length of 6,612 meters and the largest cross-section size of 6,870 millimeters [2]. - It is the highest tunnel project at an elevation of 2,005 meters and has the largest elevation difference of 324 meters, as well as the steepest slope of 10.61% [2]. Group 3: Environmental Considerations - The Guozi Pass area has a forest coverage rate of 53% and is home to 146 species of terrestrial vertebrates, serving as an ecological corridor [3]. - The company has implemented measures to minimize environmental impact, including optimized route design and innovative technology applications, as well as a tunnel drainage treatment system and comprehensive dust control measures [3].

Group 1: Pipeline Construction Achievements - The first mountain tunnel of the Guozi Valley pipeline, part of the West-East Gas Transmission project, has been completed, marking a breakthrough in the construction capabilities of long-distance pipelines under complex geological conditions [1][5][12] - The Guozi Valley pipeline project includes four long-distance mountain tunnels, which are the longest, largest cross-section, highest elevation, and greatest height difference tunnels in China's oil and gas pipeline sector [5][10][12] Group 2: Project Specifications and Impact - The total length of the four tunnels is 23.16 kilometers, with a height difference of 668 meters, equivalent to the height of 1.5 "Little Waist" towers [10] - The project is expected to be fully operational by September 2027, and the existing West-East Gas Transmission pipelines have already transported over 557 billion cubic meters of natural gas, benefiting 500 million people along the route [7][8] Group 3: Environmental and Operational Benefits - The use of the largest diameter and longest construction distance dual-shield full-face hard rock tunnel boring machine ensures an average safe excavation of 450 meters per month [12] - The project will operate in conjunction with existing pipelines, providing a backup and enhancing the safety of the West's oil and gas energy corridor, while also reducing carbon emissions by 53% under the same material consumption conditions [12]

Core Points - The first mountain tunnel of the Guozi Valley pipeline, part of the West-East Gas Pipeline project, has been completed, marking a significant achievement in the construction capabilities of long-distance pipelines under complex geological conditions [1][2] - The Guozi Valley is a critical route for the West-East Gas Pipeline's second and third lines, which traverse the Tianshan Mountains, facing challenges from geological hazards [1] - The Guozi Valley pipeline project is expected to be fully operational by September 2027, having already transported over 557 billion cubic meters of natural gas, benefiting 500 million people along the pipeline [1] Industry Achievements - The Guozi Valley pipeline project features a total length of 32 kilometers, with four long-distance mountain tunnels comprising 23.16 kilometers, showcasing multiple industry records [2] - The tunnels have the longest single excavation length (6,612 meters), the largest cross-section (6,870 mm), the highest elevation (2,005 meters), the greatest height difference (324 meters), and the steepest slope (10.61%) in the domestic oil and gas pipeline sector [2] - This project is the first in the industry to cross an active seismic fault zone, utilizing the largest diameter and longest construction distance dual-shield full-face hard rock tunnel boring machine, ensuring an average safe excavation rate of 450 meters per month [2]