Investigation of failure behavior of continuous rock mass around cavern under high internal pressure

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Tunsakul J., Jongpradist P., Kongkitkul W., Wonglert A., Youwai S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2013

วารสาร: Tunnelling and Underground Space Technology (0886-7798)

Volume number: 34

หน้าแรก: 110

หน้าสุดท้าย: 123

จำนวนหน้า: 14

นอก: 0886-7798

eISSN: 1878-4364

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872389545&doi=10.1016%2fj.tust.2012.11.004&partnerID=40&md5=6d8d1f172bace2d498b2e41e6f026dd1

ภาษา: English-Great Britain (EN-GB)

ดูในเว็บของวิทยาศาสตร์ | ดูบนเว็บไซต์ของสำนักพิมพ์ | บทความในเว็บของวิทยาศาสตร์

บทคัดย่อ

A series of physical and numerical model tests were performed to investigate the failure behavior of a continuous rock mass surrounding a silo-shaped cavern under high internal pressure. This research aims to provide information on fracture initiation and propagation in the rock mass around an underground gas storage cavern occurring as a result of applying high internal pressure under different controlled conditions. By scaling down the prototype 200 times, synthetic rock specimens containing silo-shaped hole were confined to vertical pressures of 12.5 and 25. kPa, with a Ko of 0.5, 1 and 3 in the two horizontal directions. The pressure was gradually applied in the silo until fracture initiated and propagated. The photogrammetric analysis provides insights into the response of the rock mass during the application of internal pressure and assists in identifying the failure path that occurred. The resulting fracture patterns indicate that the lateral earth pressure coefficient at rest, Ko, has a strong influence on the position of crack initiation and the propagation direction of the failure path. Supplemental numerical analyses were carried out to evaluate the failure mode, which cannot be addressed by the model tests. The numerical method, based on finite element method, considers stress analysis with localization and is developed to capture the formation of discrete fractures in a continuum. It is found that the method is able to accurately represent the factors that affect the fracture pattern and that a qualitative agreement between the experimental and numerical results can be established. A comparison between experimental and numerical results indicates that the fracturing process was caused by tensile cracking. ฉ 2012 Elsevier Ltd.

คำสำคัญ

Crack propagation, Failure behavior, Fracture initiation, High internal pressure, Underground cavern