| 高应力巷道开挖围岩损伤分析 |
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| 引用本文： | 张晓君,靖洪文.高应力巷道开挖围岩损伤分析[J].采矿与安全工程学报,2009,26(1). |
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| 作者姓名： | 张晓君 靖洪文 |
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| 作者单位： | 1. 中国矿业大学,建筑工程学院,江苏,徐州,221116;山东理工大学,资源与环境工程学院,山东,淄博,255049
2. 中国矿业大学,建筑工程学院,江苏,徐州,221116 |
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| 基金项目： | 国家自然科学基金，山东省自然科学基金 |
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| 摘 要： | 首先运用岩石破裂过程分析RFPA分别对有、无裂纹情况下的高应力巷道开挖围岩损伤过程进行了分析,随后,对有、无裂纹情况下的高应力巷道开挖围岩损伤进行了理论分析.模拟结果再现了巷道围岩开挖卸荷后声发射变化全过程.数值模拟与理论分析表明:高应力巷道围岩卸荷破坏是个损伤逐渐累积最终演致破坏的过程;垂直方向为最大主应力情况下,损伤主要从两帮开始,然后向两帮深部扩展,扩展到一定程度后沿大主应力方向扩展;卸荷损伤过程受裂纹影响很大,裂纹改变巷道围岩损伤演化过程,对损伤演化过程起主要控制作用;提出的理论分析方法可用于巷道围岩开挖卸荷后损伤破坏情况的分析.
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| 关 键 词： | 围岩卸荷 裂纹 数值模拟 损伤 声发射 |
Analysis of Excavation Damage in Highly Stressed Surrounding Rocks of Roadways |
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| ZHANG Xiao-jun,JING Hong-wen.Analysis of Excavation Damage in Highly Stressed Surrounding Rocks of Roadways[J].Journal of Mining and Safety Engineering,2009,26(1). |
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| Authors: | ZHANG Xiao-jun JING Hong-wen |
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| Affiliation: | 1.School of Architecture and Civil Engineering;China University of Mining & Technology;Xuzhou;Jiangsu 221116;China;2.School of Resources and Environment;Shandong University of Technology;Zibo;Shandong 255049;China |
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| Abstract: | Considering the effect of cracks,we numerically studied the excavation damage processes of surrounding rock using a rock failure process analysis code(RFPA) and theoretically analyzed the excavation damage of surrounding rocks.The results of numerical simulation duplicate the whole damage process of surrounding rock unloading of roadways.The result indicates that 1) the unloading failure of highly stressed surrounding rocks is a gradual process of damage-accumulation at first and then an accelerated failure... |
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| Keywords: | surrounding rock unloading crack numerical simulation damage acoustic emission |
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