| 徐士良,何怀虎.静动荷载作用下应变型岩爆脆性破坏区预测研究[J].安徽建筑大学学报,2021,29(): |
| 静动荷载作用下应变型岩爆脆性破坏区预测研究 |
| Prediction of brittle failure zone of strain rockburst under static and dynamic loads |
| 投稿时间：2020-10-10 修订日期：2020-12-06 |
| DOI： |
| 中文关键词: 应变型岩爆 脆性破坏区 静动荷载 理论分析 数值模拟 |
| 英文关键词: Strain rockburst brittle failure zone static and dynamic loads theoretical analysis numerical simulation |
| 基金项目:安徽教育厅自然科学基金(KJ2019A0739)#$NL |
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| 中文摘要: |
| 针对地下工程岩爆不良地质现象的勘察评价和防治,鉴于地质环境条件的复杂性,本文提出了静动荷载作用下应变型岩爆脆性破坏区理论分析和数值模拟预测方法。采用工程岩体岩爆判据和考虑最不利荷载组合情况,得到静动荷载共同作用下应变型岩爆破坏区深度理论公式,可以作为预测岩爆脆性破坏区深度的实用公式,并采用DISL脆塑性本构模型较好地模拟了岩爆脆性破坏区范围；根据影响因素理论分析,静动荷载作用下应变型岩爆破坏区深度随着水平地应力比值和裂纹起裂应力的增大而减小,随着岩体剪切波波速和地震动峰值振动速度增大而增大。 |
| 英文摘要: |
| In view of the investigation evaluation and prevention of the adverse geological phenomena of rockburst in underground engineering, a prediction method of theoretical analysis and numerical simulation for the brittle failure zone of strain rockburst under static and dynamic loads are proposed considering complexity of geological environment conditions. Based on the rockburst criterion of engineering rock mass and the most unfavorable composition of load, the theoretical formula of brittle failure zone depth of strain rockburst under static and dynamic loads is obtained, which can be used as a practical formula to apply, and the brittle failure zone of srtain rockburst is also accurately simulated by using the DISL brittle plastic constitutive model. According to theoretical analysis of influencing factors, the brittle failure zone depth of strain rockburst under static and dynamic loads decreases with the increasing of horizontal in-situ stress ratio and crack initiation stress, and increases with the increasing of shear wave velocity and seismic Peak Ground Velocity of rock mass. |
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