Recently, the Inner Mongolia Central Station completed quality supervision for the pre-lining phase of the underground gas storage system in the national scientific demonstration project—”Large-scale Compressed Air Energy Storage and Key Equipment Development Demonstration Project.” This marks the station’s first quality inspection of an artificial underground cavern gas storage facility.
As a pioneering independent energy storage technology demonstration project in China, this facility features a 150-meter-deep artificial cavern structure with a design operating pressure of 10 MPa. Confronted with quality supervision challenges for high-pressure gas storage systems, the station strictly adhered to the principle of “balancing quality oversight with service support.” While conducting efficient supervision, it performed a thorough assessment of project quality to further ensure construction integrity.
Key measures included:
- Enhanced technical coordination: Assembled a multidisciplinary expert team to develop specialized quality checklists based on engineering standards, addressing the project’s unique “surrounding rock-lining-steel liner” composite support system and blasting construction requirements.
- Rigorous physical verification: Inspection teams descended 150 meters underground to conduct full-scale on-site measurements of cavern excavation dimensions and surrounding rock convergence monitoring data. Cross-referenced with construction records to identify 6 quality issues and propose 9 optimization suggestions.
- Collaborative improvement: Held in-depth discussions with project stakeholders on enhancing compressed air energy storage construction quality, facilitating detailed rectification plans and ensuring closed-loop problem resolution—fully leveraging the station’s service functions and technical expertise.
Moving forward, the Inner Mongolia Central Station will systematically compile its artificial cavern quality supervision experience into standardized procedures for similar projects, establishing valuable reference frameworks for future work.
