永泰能源海则滩煤矿中央辅助运输大巷安全精准贯通

Core Viewpoint - The successful completion of the central auxiliary transport roadway at Yihua Mining's Haizetang coal mine marks a significant milestone in establishing the mine's main development roadway system, laying a solid foundation for the coal production target set for Q3 2026 [1][3]. Group 1: Engineering Achievements - The central auxiliary transport roadway spans 1,943.51 meters, with a total guiding line length of 2,261.60 meters, showcasing exceptional engineering standards [1]. - The measured angle closure difference was only 33 seconds, significantly better than the allowable value of 59 seconds, while the elevation closure difference was controlled within 40 millimeters, below the allowable standard of 47 millimeters [1]. - The achievement of millimeter-level precision was attributed to the deep application of high-precision gyroscope directional technology, effectively overcoming cumulative distance measurement errors [1]. Group 2: Collaborative Efforts - Yihua Mining formed a joint working group with China Coal Construction Group to establish an efficient collaboration mechanism, ensuring minimal disruption to on-site excavation operations [2]. - The management model emphasizes clear responsibilities and detailed progress plans, breaking down the 1,943-meter roadway into key nodes for effective oversight [2]. - The process safety and quality control were reinforced by incorporating the closure precision indicators into key assessment items, ensuring the simultaneous achievement of safety, quality, and progress goals [2]. Group 3: Future Development and Strategic Advantages - The successful completion of the central auxiliary transport roadway enhances the underground transportation system, facilitating equipment installation and subsequent efficient production [3]. - The Haizetang coal mine covers an area of approximately 200 square kilometers, with a resource reserve of 1.145 billion tons and an average calorific value exceeding 6,500 kcal, indicating significant advantages in resource reserves and coal quality [3]. - The coal produced can be directly transported to the railway station via a dedicated loading point, reducing transportation costs by approximately 10 yuan per ton compared to surrounding coal mines, thus enhancing the company's competitive and profitability capabilities [3].