|Table of Contents|

Development of low-permeability materials for underground gas storage lining and research on gas sealing effect(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年04期
Page:
105-114
Research Field:
建筑材料
Publishing date:

Info

Title:
Development of low-permeability materials for underground gas storage lining and research on gas sealing effect
Author(s):
HAN Cong1; 2;  WANG Hanpeng1; 2;  ZHANG Bing1; 2;  XING Wenbin1; 2;  WANG Su1; 2;  CAI Heng1; 2;  YU Xinping1; 2
(1. State Key Laboratory for Tunnel Engineering, Shandong University, Jinan 250002, Shandong, China; 2. School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China)
Keywords:
underground gas storage;  ultra-low-permeability material;  lining;  gas sealing effect;  orthogonal test
PACS:
TU57
DOI:
10.19815/j.jace.2023.11033
Abstract:
Aiming at the problem of insufficient sealing of surrounding rock and lining in the underground space of the abandoned coal mine used for compressed air storage, a new type of cement-based ultra-low-permeability material was prepared using quartz sand, barite powder, and iron concentrate powder as aggregates, and sulfoaluminate cement as binder. A three factor three-level orthogonal test was designed to determine the physical and mechanical properties of materials. In order to verify the sealing performance of the new cementitious materials, continuous-discontinuous numerical calculations were carried out to simulate the sealing effect of the lining of underground gas storage tunnel in Da'an mountain. The results show that the uniaxial compressive strength, split tensile strength and modulus of elasticity of the specimen increase significantly with the increase of the content of sulfoaluminate cement, and decrease with the increase of the porosity of aggregate grading and the dosage of cement additives. The permeability is significantly reduced with the increase of sulphuraluminate cement content, and significantly elevated with the increase of aggregate grading porosity, and slightly increased with the increase of cement additives dosage. The new type of cement-based ultra-low-permeability material can be used in the shotcrete or grout layer of gas storage chambers, with a permeability as low as 1.06×10-19 m2 and better performance than P12 grade impermeable concrete. The numerical calculation results show that adding a cement-based ultra-low-permeability material with a thickness of 0.1 m on the concrete lining can effectively reduce the air leakage rate of the gas storage chamber, with good sealing performance, and a single cycle air leakage rate of only 0.84%.

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Last Update: 2025-07-10