| 循环爆破作用下岩体的不同步累积损伤测试方法 |
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| 引用本文： | 赵春生,费鸿禄,胡刚.循环爆破作用下岩体的不同步累积损伤测试方法[J].爆破器材,2019,48(2):57-62. |
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| 作者姓名： | 赵春生 费鸿禄 胡刚 |
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| 作者单位： | 中铁十八局集团第二工程有限公司 河北唐山,064000;辽宁工程技术大学爆破技术研究院 辽宁阜新,123000 |
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| 摘 要： | 为了提高循环爆破载荷作用下岩体累积损伤测试方法的精确度、预测结果的可信值以及控制标准的规范化，提出不同步累积损伤测试方法。采用理论分析与现场实践相结合的方法，基于5次循环爆破载荷作用下不同测孔深度处声波速度的变化规律，依据损伤度与声波速度的关系式，对比分析2种测试方法的累积损伤效应。研究结果表明:循环爆破载荷仅对测孔孔口至1.6 m处岩体区域产生损伤效应，并且垂直于掌子面的剖面区域所受的累积损伤最为严重；不同步测试方法所得的岩体累积损伤效应更加明显，且累积损伤-爆破次数关系曲线更加光滑，由此证明,不同步累积损伤测试方法能够提高测试精度，增加拟合曲线的可信程度，不仅为支护厚度提供依据，而且为支护方向提供参考。
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| 关 键 词： | 爆破 隧道 不同步 累积损伤 循环 测试方法 |
Asynchronous Accumulative Damage Testing Method of Rock under Cyclic Blasting |
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| ZHAO Chunsheng①,FEI Honglu②,HU Gang②.Asynchronous Accumulative Damage Testing Method of Rock under Cyclic Blasting[J].Explosive Materials,2019,48(2):57-62. |
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| Authors: | ZHAO Chunsheng① FEI Honglu② HU Gang② |
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| Affiliation: | ① No. 2 Engineering Co., Ltd., China Railway Eighteenth Bureau Group (Hebei Tangshan, 064000) ② Institute of Blasting Technique, Liaoning Technical University (Liaoning Fuxin, 123000) |
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| Abstract: | In order to improve the accuracy of accumulative damage testing method for rock under cyclic blasting load, the credibility of prediction results and the standardization of control standards, a testing method of unsynchronized accumulative damage was proposed. In combination of theoretical analysis with field practice, the variation rule of acoustic velocity at different depths of measuring hole was clarified under the five cyclic blasting loads. Based on the relation between damage degree and acoustic velocity, the accumulative damage effects of the two testing methods were compared. The results show that the cyclic blasting load only produces failure on the rock area from the hole opening extending to 1.6 m, and the accumulative damage is the most serious in the 2#-3# section area. The accumulative damage effect of rock obtained by unsynchronized testing method is more significant and the accumulative damage versus blasting time curve is smoother, which proves that unsynchronized accumulative damage testing method can improve the testing accuracy and increase the credibility of fitting curve. The testing method of unsynchronized accumulative damage not only provides the basis for the support thickness, but also offer the reference for the support direction. |
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| Keywords: | blasting tunnel asynchrony accumulative damage cyclic test method |
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