西安建筑科技大学学报(自然科学版)

以重庆江习张家岩Ⅳ级泥岩段隧道为爆破研究对象,根据张家岩隧道实际工程的地质结构与地层岩性,基于X射线衍射试验和室内力学试验,获得泥岩的基本物理力学参数.从微差、孔间距、孔径、装药量四个方面综合分析其对爆破效果的影响,采用正交试验制定了泥岩隧道爆破模拟方案,并借助ANSYS/LS-DYNA显示动力分析程序,对隧道的爆破参数进行优化,得到了泥岩隧道的爆破优化方案,通过对比分析,筛选出最优爆破方案.最后,将最优爆破方案与现场测试结果进行对比,结果表明模拟结果和测试结果基本吻合,且优化后的爆破效果要明显好于原爆破效果.研究成果可在类似隧道提出针对性爆破参数设计建议并推广应用.

Taking the Zhangjiayan IV mudstone section tunnel of Chongqing Jiangxi as the blasting object, according to the geological structure and lithology of the actual project of the Zhangjiayan tunnel, the basic physical and mechanical parameters of the mudstone were obtained based on X-ray diffraction test and laboratory mechanical test. From the four aspects of the differential, hole spacing, aperture, and charge amount, the impact of the blasting on the blasting effect was analyzed comprehensively. The simulation scheme of the mudstone tunnel blasting was formulated using orthogonal test, and the dynamic analysis program was displayed with ANSYS/LS-DYNA. The blasting parameters were optimized to obtain a blasting optimization program for a mudstone tunnel. Through comparative analysis, an optimal blasting scheme was selected. Finally, the optimal blasting scheme is compared with the field test results. The results show that the simulation results are basically consistent with the test results, and the optimized blasting effect is obviously better than the original blasting effect. The research results can be proposed in a similar tunnel to the design of targeted blasting parameters and promote their application.

引言
1 张家岩隧道爆破模拟
2 计算结果分析
3 现场测试结果分析
4 结论

图1 隧道爆破炮孔布置图<br/>Fig.1 Tunnel blasting hole layout

图1 隧道爆破炮孔布置图
Fig.1 Tunnel blasting hole layout

表1 隧道洞身上导洞开挖爆破参数表<br/>Tab.1 The upper excavation blasting parameters

表1 隧道洞身上导洞开挖爆破参数表
Tab.1 The upper excavation blasting parameters

表2 隧道洞身下导洞开挖爆破参数表<br/>Tab.2 The lower excavation blasting parameters

表2 隧道洞身下导洞开挖爆破参数表
Tab.2 The lower excavation blasting parameters

图2 泥岩矿物成分<br/>Fig.2 Mudstone mineral composition

图2 泥岩矿物成分
Fig.2 Mudstone mineral composition

表3 泥岩常规力学参数表<br/>Tab.3 Mudstone conventional mechanical parameters

表3 泥岩常规力学参数表
Tab.3 Mudstone conventional mechanical parameters

图3 模型示意图<br/>Fig.3 Blasting model diagram

图3 模型示意图
Fig.3 Blasting model diagram

表4 岩石的各项参数
Tab.4 Rock parameters

表5 乳化炸药各项参数<br/>Tab.5 Emulsion explosive parameters

表5 乳化炸药各项参数
Tab.5 Emulsion explosive parameters

表6 空气的各项参数
Tab.6 Air parameters

图4 Ⅳ级泥岩隧道原爆破成型结果<br/>Fig.4 Numerical simulation of the original blasting forming of grade Ⅳ mudstone tunnel

图4 Ⅳ级泥岩隧道原爆破成型结果
Fig.4 Numerical simulation of the original blasting forming of grade Ⅳ mudstone tunnel

表7 光面爆破参数表<br/>Tab.7 Smooth blasting parameter table

表7 光面爆破参数表
Tab.7 Smooth blasting parameter table

表8 光面爆破质量评价标准<br/>Tab.8 Smooth blasting quality evaluation standard

表8 光面爆破质量评价标准
Tab.8 Smooth blasting quality evaluation standard

图5 爆破方案爆破成型结果<br/>Fig.5 Blasting program simulation results

图5 爆破方案爆破成型结果
Fig.5 Blasting program simulation results

图6 隧道爆破不同位置处的围岩超欠挖量<br/>Fig.6 Surrounding rock over-excavation at different locations of tunnel blasting

图6 隧道爆破不同位置处的围岩超欠挖量
Fig.6 Surrounding rock over-excavation at different locations of tunnel blasting

图7 Ⅳ级泥岩方案2与方案5比较图<br/>Fig.7 Comparison of Scheme 2 and Scheme 5 of Grade V Surrounding Rock ofSand-mud Interlayer

图7 Ⅳ级泥岩方案2与方案5比较图
Fig.7 Comparison of Scheme 2 and Scheme 5 of Grade V Surrounding Rock ofSand-mud Interlayer

表9 Ⅳ级泥岩爆破结果<br/>Tab.9 Grade IV mudstone blasting results

表9 Ⅳ级泥岩爆破结果
Tab.9 Grade IV mudstone blasting results

图8 现场结果与数值结果对比(优化后)<br/>Fig.8 Comparison of blasting results after optimization

图8 现场结果与数值结果对比(优化后)
Fig.8 Comparison of blasting results after optimization

表10 Ⅳ级泥岩隧道优化后模拟数值与实测值对比<br/>Tab.10 Comparison between simulated and measured values of mudstone tunnel optimization

表10 Ⅳ级泥岩隧道优化后模拟数值与实测值对比
Tab.10 Comparison between simulated and measured values of mudstone tunnel optimization

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备注

引言

1 张家岩隧道爆破模拟

2 计算结果分析

3 现场测试结果分析

4 结论

期刊信息