中国首条穿越贺兰山铁路隧道贯通

Core Viewpoint - The completion of the Helan Mountain Tunnel marks a significant milestone for the Baoyin High-speed Railway's Yinba branch, enhancing the railway network in the Ningxia and Inner Mongolia regions and promoting regional economic development [1] Group 1: Project Details - The Helan Mountain Tunnel is a critical engineering project located at the border of Alxa Left Banner in Inner Mongolia and Yinchuan in Ningxia, characterized by complex geological conditions and a sensitive ecological environment [1] - The total length of the Baoyin High-speed Railway's Yinba branch is approximately 111 kilometers, connecting Yinchuan City in Ningxia to Bayanhot Town in Alxa League, Inner Mongolia [1] Group 2: Construction Techniques - The construction team utilized advanced techniques including "mechanical excavation + C6 drilling machine operation + dynamic monitoring" to ensure high-quality and efficient tunneling [1] Group 3: Economic Impact - The completion of this railway project is expected to improve the railway network layout within Ningxia and Inner Mongolia, playing a vital role in promoting high-quality economic and social development in the region [1]