Evaluation of rock fracture patterns based on the element-free Galerkin method for stability assessment of a highly pressurized gas storage cavern

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Tunsakul J., Jongpradist P., Kim H.-M., Nanakorn P.

ผู้เผยแพร่: Springer

ปีที่เผยแพร่ (ค.ศ.): 2018

วารสาร: Acta Geotechnica (1861-1125)

Volume number: 13

Issue number: 4

หน้าแรก: 817

หน้าสุดท้าย: 832

จำนวนหน้า: 16

นอก: 1861-1125

eISSN: 1861-1133

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027961644&doi=10.1007%2fs11440-017-0594-5&partnerID=40&md5=66f7784d5c337912aed7c584315709d4

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Reasonable failure paths are crucial in the stability assessment of a highly pressurized gas storage cavern in a rock mass using limit equilibrium analysis. In this study, the fracture patterns in the rock mass around a gas storage cavern are evaluated based on the element-free Galerkin (EFG) method with a cohesive crack model. The proposed analysis method was first validated through scaled-down model testing results before extending to a full-scale problem. Using the current approach, a parametric sensitivity analysis was performed by taking into account the influences of the stress ratio, the depth of the cavern, and the tensile strength of the rock mass. Based on the analysis results obtained, this research showed that the representative failure paths, in which the uplift evaluation is necessary, can be established from the EFG results with careful consideration of crack initiation and the propagation direction. The site having an in situ stress ratio greater than 1.2 is preferred for operation of underground gas storage caverns. By performing the limit equilibrium analyses for stability assessment of the rock mass above the pressurized cavern, we demonstrated that the factor of safety against uplift computed from the failure paths established in this study is higher than or equal to those obtained from analyses with the simplified models in previous studies without considering the influence parameters on the fracture patterns. ฉ 2017, Springer-Verlag GmbH Germany.

คำสำคัญ

Fracture pattern, Underground gas storage, Uplift evaluation