Burst characteristics of rock under a high internal air pressure

LIU Shao-hua; XIA Cai-chu; XU Ying-jun; XU Chen

doi:10.16285/j.rsm.2024.1470

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Burst characteristics of rock under a high internal air pressure

更新时间：2026-06-25

- Burst characteristics of rock under a high internal air pressure
- Vol. 46, Issue 11, Pages: 3431-3440(2025)
- 作者机构：
  
  1. 宁波大学岩石力学研究所,浙江,宁波,315000
  2. 宁波大学宁波市能源地下结构重点实验室,浙江,宁波,315000
  3. 南方电网能源发展研究院有限责任公司,广东,广州,510700
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2024.1470
  CLC： TU45
- Online First：11 November 2025，
  
  Published：11 November 2025
- 稿件说明：
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LIU Shao-hua, XIA Cai-chu, XU Ying-jun, et al. Burst characteristics of rock under a high internal air pressure[J]. 2025, 46(11): 3431-3440.
DOI：

LIU Shao-hua, XIA Cai-chu, XU Ying-jun, et al. Burst characteristics of rock under a high internal air pressure[J]. 2025, 46(11): 3431-3440. DOI： 10.16285/j.rsm.2024.1470.

摘要

在压气储能岩石内衬洞室中，岩石的环向抗拉强度是计算洞室极限承载能力和长期稳定性的重要参数。而现有的岩石抗拉强度测量方法，是通过直接拉伸试验或间接拉伸试验，如巴西劈裂、点载荷弯曲法等，不能真实反映岩石在高内气压作用下环向受力的情况。基于此，提出了一种新的测量方法：通过向打孔岩样中注入高压空气，得到岩石破裂压力，考虑岩石孔隙应力，提出了岩石抗拉强度的计算公式。在试验中，改变充气速率和岩石温度，得到了岩石破裂压力与充气速率是负相关关系，与温度是正相关关系。通过循环充放气试验，得到了在循环次数n较小时（n≤100），岩石破裂压力与循环次数是正相关关系。这些试验结果可以指导压气储能岩石内衬洞室的设计计算，有利于压气储能技术的推广应用，具有重要的工程应用价值。

Abstract

In rock-lined caverns with compressed air energy storage (CAES)

the hoop tensile strength of rock is an important parameter for calculating the ultimate bearing capacity and long-term stability of the cavern. The existing methods for measuring the tensile strength of rock are direct tensile tests or indirect tensile tests

such as Brazilian splitting and point load bending tests

which cannot truly reflect the circumferential stress of rock under high internal air pressure. Based on this

a new measurement method is proposed. By injecting high-pressure air into the drilled rock sample

the rock burst pressure is obtained. Then a calculation formula for the rock tensile strength is proposed considering the rock pore stress. In the experiments

the inflation rate and the temperature are changed

and it is found that the rock burst pressure is negatively correlated with the inflation rate and positively correlated with the temperature. It is found that when the number of cycles is relatively small (n≤100)

the rock burst pressure is positively correlated with the number of cycles. The results can guide the design and calculation of rock-lined caverns for CAES

which is conducive to the promotion and application of CAES technology and has important engineering application value.

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