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摘要 ：
在隧道掘进施工过程中采用水间隔装药爆破时,炮孔中同时存在空气和水两种间隔介质,其形成的爆炸应力相比单一空气间隔要复杂。为了选取合适的装药结构并确定合理的爆破参数指导现场施工,以温泉隧道为工程背景采用数值模拟的方法对周边孔水间隔和空气间隔装药爆炸应力进行模拟分析,然后选取合适的装药结构进行参数优化,最后通过现场试验进行验证。研究结果表明:在药量相同的情况下,周边孔采用水间隔爆破能够将爆炸能量比较均匀的传递到孔壁,对孔壁周围和炮孔上部围岩的破碎情况要好于空气间隔爆破,意味着达到相同的爆破效果,采用水间隔装药结构能够降低炸药单耗;当周边孔采用水间隔装药结构时,装药量为三段药卷0.9 kg,孔底水介质...
关键词 ：
水间隔装药 水间隔装药 空气间隔装药 空气间隔装药 周边孔 周边孔 参数优化 参数优化
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| GB/T 7714 | 刘江超 , 高文学 , 张声辉 . 隧道掘进周边孔间隔装药结构选取及优化 [J]. | 爆破 , 2021 , 38 (03) : 38-44,112 . |
| MLA | 刘江超 等. "隧道掘进周边孔间隔装药结构选取及优化" . | 爆破 38 . 03 (2021) : 38-44,112 . |
| APA | 刘江超 , 高文学 , 张声辉 . 隧道掘进周边孔间隔装药结构选取及优化 . | 爆破 , 2021 , 38 (03) , 38-44,112 . |
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摘要 ：
为了研究爆破振动影响下的隧道围岩损伤地质雷达图像的演化规律,对围岩损伤模型进行基于时域有限差分法的正演模拟,并进行相应的场地试验。研究结果表明:对雷达信号进行EEMD-HHT变换得到的一阶瞬时振幅参量有效滤除了原始信号中高频电磁波的绕射和杂波干扰,突显了原始信号的特征信息;针对岩体裂隙损伤模型进行正演模拟,发现雷达信号的一阶瞬时振幅分量对损伤区域有很好的成像效果,使定量分析损伤特征成为可能;爆破振动影响下围岩的损伤演化受其完整性程度影响大,经历多次循环爆破作用影响的围岩区域完整性差,裂缝区域会在爆破作用下产生扩展与贯穿,新生裂缝多出现在距爆源较近区域。
关键词 ：
EEMD分解 EEMD分解 围岩损伤 围岩损伤 地质雷达 地质雷达 正演模拟 正演模拟 隧道爆破 隧道爆破
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| GB/T 7714 | 宋肖龙 , 高文学 , 季金铭 et al. 基于EEMD-HHT变换的爆破损伤分析方法 [J]. | 中南大学学报(自然科学版) , 2021 , 52 (08) : 2887-2896 . |
| MLA | 宋肖龙 et al. "基于EEMD-HHT变换的爆破损伤分析方法" . | 中南大学学报(自然科学版) 52 . 08 (2021) : 2887-2896 . |
| APA | 宋肖龙 , 高文学 , 季金铭 , 叶明班 , 张登杰 . 基于EEMD-HHT变换的爆破损伤分析方法 . | 中南大学学报(自然科学版) , 2021 , 52 (08) , 2887-2896 . |
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摘要 ：
It is necessary to study the dynamic response of particles under blasting excavation to ensure the safety of slope. Based on field blasting vibration monitoring experiments, the wavelet packet transforms and numerical calculations were used jointly to study the energy response of particles in a slope at different frequency bands and the dynamic response characteristics of key positions of the benches. The results indicated that the blasting vibration energy in a rock slope would change in different frequency bands. The energy attenuation and amplification effects were mainly manifest as high-frequency energy attenuation and low-frequency energy amplification, respectively. The peak particle velocity (PPV), energy, and peak stress of the slope surface are generally attenuated with the increase in the explosion source distance. The vibration energy in the 51-100Hz frequency band had the greatest attenuation, and the PPV of the vertical component was larger than that of the horizontal component. As the elevation increased, the vibration energy at the top of the bench had the largest amplification coefficient in the 11-25Hz frequency band. Both the particle stress concentration at the bottom of the bench and the "whiplash effect" of the PPV at the top of the bench may affect the stability of slope. Thus, the safety and stability of rock slopes should not be evaluated by only considering a single index, but it should be combined with a comprehensive analysis of multiple indices.
关键词 ：
Blasting vibration Blasting vibration Dynamic response Dynamic response PPV PPV Rock slope Rock slope Vibration energy Vibration energy Whiplash effect Whiplash effect
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| GB/T 7714 | Zhang, Shenghui , Gao, Wenxue , Ye, Mingban et al. Dynamic response characteristics of a rock slope under blasting excavation [J]. | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2021 , 80 (11) : 8453-8464 . |
| MLA | Zhang, Shenghui et al. "Dynamic response characteristics of a rock slope under blasting excavation" . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 80 . 11 (2021) : 8453-8464 . |
| APA | Zhang, Shenghui , Gao, Wenxue , Ye, Mingban , Liu, Jiangchao , Liu, Liansheng , Li, Xiaoshuai et al. Dynamic response characteristics of a rock slope under blasting excavation . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2021 , 80 (11) , 8453-8464 . |
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摘要 ：
To study the influence of axial and radial uncoupling coefficient on blasting effect when air and water are used as spacer in surrounding holes of tunnel water seal blasting, and the optimal charge coefficient is determined for construction. Combined with numerical simulation and field test, the research results show that: (1) When the air and water are used as the interval medium in the peripheral hole for multi-hole blasting, the optimal value range of axial uncoupling coefficient is 2.2∼2.5. The optimal value range of radial uncoupling coefficient is 1.5∼1.6. (2) The concept of composite uncoupling coefficient is proposed, and the optimal decoupling charge coefficient is determined. Finally, the axial decoupling coefficient is 2.2 and the radial decoupling coefficient is 1.6, which can meet the blasting requirements. (3) The simulation results are verified by field test. It is proved that the axial decoupling coefficient is 2.2 and the radial decoupling coefficient is 1.6, which is better than the research results of axial decoupling coefficient of 2.07 and radial decoupling coefficient of 1.5 used in conventional blasting. The results show that the air and water media used in engineering construction can improve the blasting effect and reduce the explosive unit consumption. © Published under licence by IOP Publishing Ltd.
关键词 ：
Explosives Explosives Blasting Blasting Optimal systems Optimal systems
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| GB/T 7714 | Liu, Jiangchao , Gao, Wenxue , Zhang, Shenghui et al. Numerical Analysis and Application of Uncoupled Coefficient of Water Sealed Blasting on Blasting Effect [C] . 2021 . |
| MLA | Liu, Jiangchao et al. "Numerical Analysis and Application of Uncoupled Coefficient of Water Sealed Blasting on Blasting Effect" . (2021) . |
| APA | Liu, Jiangchao , Gao, Wenxue , Zhang, Shenghui , Xu, He . Numerical Analysis and Application of Uncoupled Coefficient of Water Sealed Blasting on Blasting Effect . (2021) . |
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摘要 ：
In order to study the propagation characteristics of blasting seismic waves by using the analysis and research of blasting vibration monitoring data of Urumqi subway tunnel excavation, the blasting vibration signal has been decomposed into several IMF components by EEMD decomposition and fractal theory has been used to calculate the correlation dimension in this paper. The results show that the IMF component can reveal the frequency characteristics in the blasting vibration signal clearly. As the measuring point is far away from the explosion source, the complexity of the frequency component of the vibration signal gradually decreases. The seismic wave interacts with the rock and soil medium in the propagation process, make it shown non-linear characteristics, which are not easily to be observed by conventional measure methods. This paper introduces fractal dimension to study the nonlinear characteristics of blasting vibration signals and achieves the purpose of analysing the law of blasting seismic wave propagation. This study achieves a quantitative description of the effects of site media on seismic waves, and at the same time, it lays a theoretical foundation for predicting the vibration effect analysis of seismic waves reaching the target position. © Published under licence by IOP Publishing Ltd.
关键词 ：
Fractal dimension Fractal dimension Wave propagation Wave propagation Signal processing Signal processing Seismic waves Seismic waves Blasting Blasting Seismology Seismology Data flow analysis Data flow analysis Signaling Signaling Vibration analysis Vibration analysis Subways Subways
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| GB/T 7714 | Song, Xiaolong , Gao, Wenxue , Li, Jingyan et al. Analysis of Fractal Features of Blasting Vibration Signal Based on EEMD Decomposition [C] . 2021 . |
| MLA | Song, Xiaolong et al. "Analysis of Fractal Features of Blasting Vibration Signal Based on EEMD Decomposition" . (2021) . |
| APA | Song, Xiaolong , Gao, Wenxue , Li, Jingyan , Wang, Lintai , Cao, Xiaoli . Analysis of Fractal Features of Blasting Vibration Signal Based on EEMD Decomposition . (2021) . |
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摘要 ：
为了研究隧道掘进爆破对围岩造成的累计损伤效应,利用地质雷达对隧道爆破开挖过程中围岩损伤进行探测,根据地质雷达信号具有短时非平稳的特点,采取希尔伯特-黄变换(HHT)的方法对雷达信号进行处理,去除干扰,提取可以有效反映损伤特征的瞬时参量,进而得到较为直观的围岩损伤图像,并基于瞬时振幅的差异将损伤区域分为轻微损伤和严重损伤区域。研究表明,循环爆破作用会对爆破近区直接造成大量的严重损伤,而爆破中远区受到直接爆破作用影响较小,几乎不产生新生损伤,但已有的轻微损伤会进一步的演化加剧变成严重损伤,在距离爆源60 m范围之内,扰动次数越多,损伤演化越剧烈。
关键词 ：
隧道爆破 隧道爆破 地质雷达 地质雷达 希尔伯特-黄变换(HHT) 希尔伯特-黄变换(HHT) 累计损伤 累计损伤
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| GB/T 7714 | 宋肖龙 , 高文学 , 季金铭 et al. 爆破振动对隧道围岩累积损伤效应的影响 [J]. | 振动与冲击 , 2020 , 39 (24) : 54-62 . |
| MLA | 宋肖龙 et al. "爆破振动对隧道围岩累积损伤效应的影响" . | 振动与冲击 39 . 24 (2020) : 54-62 . |
| APA | 宋肖龙 , 高文学 , 季金铭 , 叶明班 , 张登杰 . 爆破振动对隧道围岩累积损伤效应的影响 . | 振动与冲击 , 2020 , 39 (24) , 54-62 . |
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摘要 ：
以温泉隧道为研究背景,从应力、振速变化、动态损伤以及爆后粉尘的角度对药柱上部水间隔、两端水间隔和下部水间隔三种装药结构进行模拟分析,选取最优结构用于工程施工。研究结果表明:(1)药柱底部水间隔装药结构易造成孔口围岩破碎导致爆炸气体流出,降低爆破效果;药柱上部和两端水间隔装药结构爆炸应力持续时间较长,有利于围岩破碎,其中药柱两端水间隔装药结构底部存在水介质,对孔底围岩起到保护作用;(2)采用两端水间隔装药结构能够同时降低炮孔两端围岩振速和所受应力,减少炸药能量流失,使其充分作用于围岩进行破碎,降低炸药单耗;(3)药柱上部水间隔装药结构对孔口围岩损伤最小,导致爆破后岩石块度较大;药柱底部水间隔装药...
关键词 ：
动态损伤 动态损伤 数值模拟 数值模拟 水封爆破 水封爆破 装药结构 装药结构
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| GB/T 7714 | 刘江超 , 高文学 , 王林台 et al. 水封爆破装药结构优化数值分析及其应用 [J]. | 振动与冲击 , 2020 , 39 (09) : 57-62,96 . |
| MLA | 刘江超 et al. "水封爆破装药结构优化数值分析及其应用" . | 振动与冲击 39 . 09 (2020) : 57-62,96 . |
| APA | 刘江超 , 高文学 , 王林台 , 曹晓立 , 张声辉 , 韦啸 . 水封爆破装药结构优化数值分析及其应用 . | 振动与冲击 , 2020 , 39 (09) , 57-62,96 . |
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摘要 ：
The blasting vibration signal obtained from tunnel construction monitoring is affected by the external environment, which contains a lot of noise that causes distortion during signal processing. To analyse the blasting vibration signal and determine the appropriate water seal blasting charge structure for construction, combined with wavelet threshold denoising method and HHT transformation, the blasting vibration signals of the four charge structures of conventional charge, water interval charge at both ends, water interval charge at the orifice, and water interval charge at the hole bottom are denoised and HHT is analysed. The results show that the wavelet threshold method can effectively eliminate high-frequency noise in the blasting vibration signals and retain information carried by the vibration signal itself. The frequency and energy of the blasting vibration signals of the water interval charge at both ends are densely distributed in the range of 0 s to 0.9 s and below 100 Hz. The frequency and energy of the blasting signals of the other three charging structures are reduced within the same range, sparse areas appear, and the instantaneous total energy is smaller than that with a water interval charge at both ends, which shows that the water interval charge at both ends can effectively apply explosive energy to the surrounding rock and reduce energy loss in the explosive. The blasting vibration signal energy of the water interval charge at both ends is mainly concentrated in components IMF2 to IMF5, and the corresponding frequencies are concentrated at 6 Hz to 11 Hz and 20 Hz to 70 Hz, while the blasting vibration signal energy of other three charge structures is mainly distributed in components IMF2 to IMF4, corresponding frequencies are concentrated within 20 Hz to 70 Hz, and the distribution at low frequencies is not obvious. Therefore, when using the water interval charge at both ends, it is necessary to increase the main vibration frequency of the original vibration signals by reducing the single section charge and using frequency shift technology to avoid the natural frequency of the structure and reduce resonance-induced damage.
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| GB/T 7714 | Liu, Jiang-chao , Gao, Wen-xue . Vibration Signal Analysis of Water Seal Blasting Based on Wavelet Threshold Denoising and HHT Transformation [J]. | ADVANCES IN CIVIL ENGINEERING , 2020 , 2020 . |
| MLA | Liu, Jiang-chao et al. "Vibration Signal Analysis of Water Seal Blasting Based on Wavelet Threshold Denoising and HHT Transformation" . | ADVANCES IN CIVIL ENGINEERING 2020 (2020) . |
| APA | Liu, Jiang-chao , Gao, Wen-xue . Vibration Signal Analysis of Water Seal Blasting Based on Wavelet Threshold Denoising and HHT Transformation . | ADVANCES IN CIVIL ENGINEERING , 2020 , 2020 . |
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摘要 ：
为研究爆破荷载作用下高陡边坡的动力稳定性问题,依托国家高山滑雪中心(延庆赛区)索道平台处边坡爆破工程,在现场监测的基础上结合数值模拟对爆破破岩过程中边坡的速度场、应力场和位移场进行了研究.研究结果表明:对于边坡坡顶平面,随着爆心距的增大,质点振速峰值呈现衰减趋势,一定范围内V垂向>V径向>V切向,质点垂向振速主频主要集中在0～50 Hz范围;对边坡坡面,随着爆心距增大,质点振速、位移总体呈现衰减趋势,台阶处受"鞭梢效应"影响,产生放大效应,并且具有方向性;台阶处应力峰值与振速峰值并非在同一位置出现,岩体边坡的岩体边坡的稳定性应综合考虑振速峰值大小及应力是否超过岩体的抗拉强度来判断.
关键词 ：
动力响应 动力响应 高陡边坡 高陡边坡 鞭梢效应 鞭梢效应 振动监测 振动监测 数值模拟 数值模拟
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| GB/T 7714 | 季金铭 , 高文学 , 曹晓立 et al. 高陡边坡动力响应研究 [J]. | 爆破 , 2020 , 37 (2) : 1-7 . |
| MLA | 季金铭 et al. "高陡边坡动力响应研究" . | 爆破 37 . 2 (2020) : 1-7 . |
| APA | 季金铭 , 高文学 , 曹晓立 , 叶明班 , 张登杰 . 高陡边坡动力响应研究 . | 爆破 , 2020 , 37 (2) , 1-7 . |
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摘要 ：
为了解决边坡岩体内爆破应力波与介质相互作用以及爆破荷载作用下边坡动力稳定性问题,依托鲁坨路路堑边坡爆破工程,在现场爆破振动测试的基础上采用数值模拟的方法对边坡坡面以及岩体内部质点的振动速度、应力场等分布规律进行深入研究.结果表明:1)对于坡面质点,水平爆心距与高程的增加均会使爆破峰值振速总体呈衰减趋势,但台阶边缘"鞭梢效应冶明显,且距离爆源越近,峰值振速放大系数越大.2)边坡台阶坡角处应力集中显著,但峰值应力与峰值振速并非在同一位置出现.因此,不能将台阶外缘峰值振速作为评价边坡稳定性的单一指标.3)对于岩体内部质点,爆破振动响应也随爆心距的增大逐渐衰减,但坡面和岩层分界面对应力波的反射叠加会造成岩体质点的峰值振速和应力均有所放大.
关键词 ：
坡面效应 坡面效应 岩质边坡 岩质边坡 振动监测 振动监测 数值模拟 数值模拟 鞭梢效应 鞭梢效应
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| GB/T 7714 | 曹晓立 , 高文学 , 吕洪涛 et al. 鲁坨路路堑边坡爆破应力波传播规律 [J]. | 北京工业大学学报 , 2020 , 46 (3) : 245-252 . |
| MLA | 曹晓立 et al. "鲁坨路路堑边坡爆破应力波传播规律" . | 北京工业大学学报 46 . 3 (2020) : 245-252 . |
| APA | 曹晓立 , 高文学 , 吕洪涛 , 李竟艳 , 张琪 . 鲁坨路路堑边坡爆破应力波传播规律 . | 北京工业大学学报 , 2020 , 46 (3) , 245-252 . |
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