[1]赵春生①,费鸿禄②,胡刚②.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(02):57-62.[doi:10.3969/j.issn.1001-8352.2019.02.011]
　ZHAO Chunsheng,FEI Honglu,HU Gang.Asynchronous Accumulative Damage Testing Method of Rock under Cyclic Blasting[J].EXPLOSIVE MATERIALS,2019,48(02):57-62.[doi:10.3969/j.issn.1001-8352.2019.02.011]
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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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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
48
期数:
2019年02
页码:
57-62
栏目:
爆破技术
出版日期:
2019-04-02

文章信息/Info

Title:
Asynchronous Accumulative Damage Testing Method of Rock under Cyclic Blasting
文章编号:
5304
作者:
赵春生①; 费鸿禄②; 胡刚②
①中铁十八局集团第二工程有限公司（河北唐山，064000）
②辽宁工程技术大学爆破技术研究院（辽宁阜新，123000）
Author(s):
ZHAO Chunsheng①;  FEI Honglu②;  HU Gang②
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)
关键词:
爆破; 隧道; 不同步; 累积损伤; 循环; 测试方法
Keywords:
blasting;  tunnel;  asynchrony;  accumulative damage;  cyclic;  test method
分类号:
TD235.1；O382+.2
DOI:
10.3969/j.issn.1001-8352.2019.02.011
文献标志码:
A
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。
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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备注/Memo

备注/Memo:
收稿日期：2018-10-08
第一作者：赵春生（1969－），男，高级工程师，主要从事桥梁和隧道方面的技术与管理工作。E-mail:blgsd10htd@163.com
通信作者：胡刚(1990－),男，博士研究生，主要从事岩土工程与爆破工程方面的研究。E-mail：1125019679@qq.com
更新日期/Last Update: 2019-04-02