Research on Stress Characteristics of Rockburst in Over-Length Deep-Buried Tunnel

IF 4.7 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-07-25 DOI:10.3390/buildings14082298

Chun Luo, Shishu Zhang, Bihua Tang, Jun Chen, Chonglin Yin, Huayun Li

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Abstract

As a unique geological hazard in a high-geo-stress environment, rockburst happens with strong suddenness, randomness, and destructiveness, but the mechanism of its occurrence in a deep-buried tunnel in a high-geo-stress environment needs further study. Based on the analyses of the stress field of the rockburst section of Ping’an Tunnel, which is over-long and deep-buried, the occurrence mechanism of rockburst is figured out. Furtherly, the intensity and location of rockburst are predicted by using the rockburst criterion. Results show that there exists large compressive stress at the side wall of the tunnel, which is the main cause of rockburst. Under a high-geo-stress condition, due to the existence of unfavorable factors like structural planes, high intensity rockburst is likely to happen in the middle of the tunnel face after the sudden release of original rock stress. Arranging stress-releasing holes in the rockburst section can effectively reduce the possibility of rockburst by releasing the original rock stress in advance. The research results can deepen the understanding of the mechanism of rockburst in a high-geo-stress environment and provide scientific basis for the prevention and control of rockburst in similar engineering projects.

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超长深埋隧道岩爆应力特征研究

岩爆作为高地应力环境下特有的地质灾害，其发生具有很强的突发性、随机性和破坏性，但其在高地应力环境下深埋隧道中的发生机理还需要进一步研究。基于对平安隧道超长深埋岩爆段应力场的分析，探讨了岩爆的发生机理。此外，还利用岩爆准则预测了岩爆的强度和位置。结果表明，隧道侧壁存在较大的压应力，这是导致岩爆的主要原因。在高地应力条件下，由于结构平面等不利因素的存在，原岩应力突然释放后，隧道面中部容易发生高强度岩爆。在岩爆段布置应力释放孔，通过提前释放原岩应力，可有效降低岩爆发生的可能性。该研究成果可加深对高地应力环境下岩爆机理的认识，为类似工程的岩爆防治提供科学依据。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico

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