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Dissipation of Impact Stress Waves within the Artificial Blasting Damage Zone in the Surrounding Rocks of Deep Roadway

机译:深沟周围岩石中人工爆破损伤区中的冲击应力波耗散

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摘要

Artificial explosions are commonly used to prevent rockburst in deep roadways. However, the dissipation of the impact stress wave within the artificial blasting damage zone (ABDZ) of the rocks surrounding a deep roadway has not yet been clarified. The surrounding rocks were divided into the elastic zone, blasting damage zone, plastic zone, and anchorage zone in this research. Meanwhile, the ABDZ was divided into the pulverizing area, fractured area, and cracked area from the inside out. Besides, the model of the normal incidence of the impact stress waves in the ABDZ was established; the attenuation coefficient of the amplitude of the impact stress waves was obtained after it passed through the intact rock mass, and ABDZ, to the anchorage zone. In addition, a numerical simulation was used to study the dynamic response of the vertical stress and impact-induced vibration energy in the surrounding rocks. By doing so, the dissipation of the impact stress waves within the ABDZ of the surrounding rocks was revealed. As demonstrated in the field application, the establishment of the ABDZ in the surrounding rocks reduced the effect of the impact-induced vibration energy on the anchorage support system of the roadway.
机译:人造爆炸通常用于防止深入的道路摇滚乐。然而,尚未澄清围绕深沟围绕围绕深道岩石的人工爆破损伤区(ABDZ)内的冲击应力波的耗散。本研究中,周围的岩石分为弹性区,爆破损伤区,塑料区和锚固区。同时,ABDZ分为粉碎区域,裂缝区域,从内部裂开区域。此外,建立了ABDZ中冲击应力波的正常发病率模型;在通过完整的岩石质量和ABDZ到锚地区之后获得抗冲应力波的振幅的衰减系数。此外,使用数值模拟来研究周围岩石中垂直应力和冲击诱导的振动能的动态响应。通过这样做,揭示了周围岩石的ABDZ内的冲击应力波的耗散。如在现场应用中所示,周围岩石中ABDZ的建立降低了冲击诱导的振动能量对道路的锚固支撑系统的影响。

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