极高地应力条件下光面爆破围岩损伤规律研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (6) : 104-112.

冲击与爆炸

极高地应力条件下光面爆破围岩损伤规律研究

黄永辉1，占宇飞1，张洪波*1，李清林2，阮迅3

作者信息 +

Damage patterns of surrounding rock under high-stress conditions in smooth blasting

HUANG Yonghui1，ZHAN Yufei1，ZHANG Hongbo*1，LI Qinglin2，RUAN Xun3

Author information +

文章历史 +

摘要

针对深埋隧道开挖过程中存在极高地应力的情况，为研究地应力对光面爆破围岩损伤产生的影响，采用基于ANSYS/LS-DYNA软件的数值模拟方法，通过结构化网格-有限元-粒子流耦合算法（S-FEM-SPH）进行三维模拟。研究在双向等值地应力0Mpa~40Mpa条件下的光面爆破围岩损伤规律，研究结果表明：边帮和顶板处的围岩损伤度根据爆心距的变化分为水平直线阶段和反“S”型曲线下降阶段；在反“S”型曲线下降阶段，距离爆心距中间位置的围岩，损伤度随爆心距的下降速率大；地应力对边帮和顶板处的围岩损伤均有影响，但对边帮处围岩损伤的影响大于顶板处，当地应力大于20Mpa时影响更加明显；通过对比边帮和顶板处有效塑性应变和围岩损伤深度随地应力的变化规律，从而验证了围岩损伤深度随地应力增加呈现先减小后增大变化规律的正确性。

Abstract

In the process of deep tunnel excavation, where extremely high in-situ stress is present, a numerical simulation method based on ANSYS/LS-DYNA software was used to study the effect of in-situ stress on surrounding rock damage caused by smooth blasting. A 3D simulation was conducted using the Structured Mesh-Finite Element-Particle Flow Coupling Algorithm (S-FEM-SPH). The study investigates the damage patterns of surrounding rock under bi-directional equivalent in-situ stress conditions ranging from 0 MPa to 40 MPa. The results indicate that the damage to the surrounding rock at the sidewalls and roof can be categorized into two phases based on the change in the distance from the blast center: a horizontal linear phase and a descending phase characterized by an inverse "S" curve. In the descending phase of the inverse "S" curve, the surrounding rock at the middle distance from the blast center shows a greater rate of damage reduction as the distance decreases. In-situ stress affects the damage to the surrounding rock at both the sidewalls and the roof, with the impact on the sidewalls being more significant than that on the roof, especially when the in-situ stress exceeds 20 MPa. By comparing the changes in effective plastic strain and the depth of surrounding rock damage at the sidewalls and roof with varying in-situ stress, the study confirms the validity of the finding that the depth of surrounding rock damage decreases initially and then increases with the rise in in-situ stress.

导出引用

黄永辉1, 占宇飞1, 张洪波1, 李清林2, 阮迅3. 极高地应力条件下光面爆破围岩损伤规律研究[J]. 振动与冲击, 2025, 44(6): 104-112

HUANG Yonghui1, ZHAN Yufei1, ZHANG Hongbo1, LI Qinglin2, RUAN Xun3. Damage patterns of surrounding rock under high-stress conditions in smooth blasting[J]. Journal of Vibration and Shock, 2025, 44(6): 104-112

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