郭晓菲;郭林峰;李臣;马念杰;赵志强;霍天宏;

• 1:中国矿业大学(北京)能源与矿业学院煤炭行业巷道支护与灾害防治工程研究中心

摘要(Abstract)：

采用理论分析、数值模拟、现场案例分析的方法,从巷道围岩塑性区演化扩展与能量释放入手,研究了不同形态塑性区对应力变化的响应规律.建立了一个以塑性区形态系数为量化指标、以塑性区形态特征为评估判定依据、能够对处在一定应力与围岩环境中的巷道进行量化的冲击风险性评估方法.结果表明:圆形、椭圆形塑性区范围小、应力响应迟钝,蝶形塑性区范围大、应力响应敏感;应力改变会引发蝶形塑性区大范围扩展,并释放大量弹性能,随着蝶形形态的发展,塑性区对应力响应程度呈递增趋势;巷道围岩塑性区形态为圆形、椭圆形时冲击风险低,蝶形时冲击风险较高,且随着蝶形形态的发展,冲击风险性不断增大;塑性区形态系数量化表征了塑性区的形态演化规律,可以定量判别巷道围岩塑性区形态类别,同时可以量化塑性区所处的演化阶段,可作为巷道冲击风险性的量化评估指标.

关键词(KeyWords)： 蝶形塑性区;形态系数;冲击风险性;量化评估

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51704294,51434006)

作者(Author): 郭晓菲;郭林峰;李臣;马念杰;赵志强;霍天宏;

Email:

DOI: 10.13247/j.cnki.jcumt.001229

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