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摘要 ：
Although in-situ stress significantly affects tunnel rock mass excavation blasting, the crack propagation law of the rock mass under both in-situ stress and cyclic blasting load has not been adequately evaluated. The blasting failure mechanism of rock mass and the cumulative damage evolution effect of cyclic blasting load under different ground stress conditions are systematically studied herein through theoretical analyses, laboratory tests, and numerical analyses. First, the Riedel-Hiermaier-Thoma (RHT) constitutive model is modified and calibrated, and its reliability is improved via an indoor split Hopkinson pressure bar splitting test. Second, the blasting failure analysis model of the dynamic and static load coupling field is established and verified via numerical simulation. Finally, a numerical simulation of the smooth blasting excavation of a rock tunnel is conducted, and the blasting failure mode of a rock tunnel subjected to ground stress is discussed. Notably, the modified and calibrated RHT model can adequately simulate dynamic crack propagation in limestone specimens. Due to the effect of ground stress, the maximum principal stress side is the most favourable direction for blasting crack propagation. The direction of blasting crack propagation is mainly determined by the loading conditions of ground stress, and the number of blasting cycles does not significantly affect the law of rock crack propagation. Smooth blasting during rock tunnel excavation can effectively reduce the dynamic response of surrounding rock in the unexcavated area. Optimizing the cutting-hole and delayed-blasting parameters can improve the blasting quality of tunnel rock mass under in-situ stress.
关键词 ：
Tunnel rock mass Tunnel rock mass Smooth blasting Smooth blasting Cycle blasting Cycle blasting Blasting failure Blasting failure Ground stress Ground stress
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| GB/T 7714 | Li, Zhuo , Hu, Yu , Wang, Genzhong et al. Study on cyclic blasting failure characteristics and cumulative damage evolution law of tunnel rock mass under initial in-situ stress [J]. | ENGINEERING FAILURE ANALYSIS , 2023 , 150 . |
| MLA | Li, Zhuo et al. "Study on cyclic blasting failure characteristics and cumulative damage evolution law of tunnel rock mass under initial in-situ stress" . | ENGINEERING FAILURE ANALYSIS 150 (2023) . |
| APA | Li, Zhuo , Hu, Yu , Wang, Genzhong , Zhou, Min , Hu, Wangjing , Zhang, Xiaojun et al. Study on cyclic blasting failure characteristics and cumulative damage evolution law of tunnel rock mass under initial in-situ stress . | ENGINEERING FAILURE ANALYSIS , 2023 , 150 . |
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摘要 ：
At present, the blasting theory of high and steep rock slope mainly focuses on flat terrain, ignoring the influence of micro-terrain boundary factors on blasting effect, which leads to excessive blasting energy and affects the stability of slope. Therefore, based on the theory of multilateral boundary rock blasting, this paper deduces the calculation formula of blasting charge for high and steep rock slope under multilateral boundary conditions, and verifies it with field test. The results show that: (1) The multilateral boundary charge calculation formula directly includes micro-topography boundary conditions and blasting effect, and the rock blasting theory is based on the interaction of blasting energy provided by explosives and potential energy in medium, which effectively improves the energy utilization rate of explosives. (2) The influence of surplus blasting energy on the surrounding environment under different boundary conditions is controlled, and the explosive explosion effect is effectively controlled, so that a stable high and steep slope of open pit mine is formed after blasting.
关键词 ：
Multilateral boundary Multilateral boundary Micro-topography Micro-topography High and steep slope High and steep slope Blasting charge Blasting charge
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| GB/T 7714 | Chen, Junkai , Gao, Wenxue , Hao, Xiangjun et al. Multilateral Boundary Blasting Theory of High and Steep Slope in Open Pit Mine and Its Application [J]. | PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE ON CIVIL ENGINEERING , 2022 : 347-357 . |
| MLA | Chen, Junkai et al. "Multilateral Boundary Blasting Theory of High and Steep Slope in Open Pit Mine and Its Application" . | PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE ON CIVIL ENGINEERING (2022) : 347-357 . |
| APA | Chen, Junkai , Gao, Wenxue , Hao, Xiangjun , Wei, Zheng , Zhang, Xiaojun , Liu, Zhaochen . Multilateral Boundary Blasting Theory of High and Steep Slope in Open Pit Mine and Its Application . | PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE ON CIVIL ENGINEERING , 2022 , 347-357 . |
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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 ：
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 ：
一种组装式深孔聚能水压爆破装置及其使用方法属于爆破技术领域。装药管为双层管，内层为空心圆筒，沿轴向设有吸能层与聚能槽，聚能槽顶部设有三角尖锥；外层为封闭空腔，外层管壁设有进水孔及孔塞；装药管中间部位设有雷管孔，管口内侧设有滑槽和卡槽，管底外侧设有卡扣。水封管为空心圆筒封闭管，上部凹陷一段，下部外凸一段，管口设有滑槽和卡槽，管底设有卡扣，管壁开有一个进水孔并配有孔塞。组装时将卡扣旋至卡槽内，即可完成装药段与水封段的对接。本发明能够改善预裂和光面爆破效果，有利于减少钻孔数量和炸药消耗量，有效降低爆破产生的粉尘量，吸能层能够有效减少爆炸能量对围岩的破坏，可以改善超挖问题，提高半孔率。
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| GB/T 7714 | 李小帅 , 高文学 , 刘江超 et al. 一种组装式深孔聚能水压爆破装置及其使用方法 : CN202110588726.1[P]. | 2021-05-28 . |
| MLA | 李小帅 et al. "一种组装式深孔聚能水压爆破装置及其使用方法" : CN202110588726.1. | 2021-05-28 . |
| APA | 李小帅 , 高文学 , 刘江超 , 张声辉 , 胡宇 , 陈军凯 . 一种组装式深孔聚能水压爆破装置及其使用方法 : CN202110588726.1. | 2021-05-28 . |
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摘要 ：
一种可拼接聚能水封爆破装置及其使用方法属于爆破技术领域。装置包括装药管与水封管，装药管为空心圆筒管，管内设有吸能层与两个相对的楔形聚能槽，聚能槽顶部设有三角尖锥和对接孔，管壁设有雷管孔，管底设有两个与对接孔相对应的插销；水封管为空心圆筒封闭管，上部设有两个对接孔，下部设有两个插销，管壁开有一个进水孔并配有孔塞；组装时通过插销和对接孔，可完成不同装药段或水封段的对接。本发明利用聚能槽产生的“气楔”作用，能够改善光面爆破效果，有利于减少钻孔数量和炸药消耗量，水封管内的水可有效降低爆破产生的粉尘量，吸能层能够有效减少爆炸能量对围岩的破坏，可以改善超挖问题，提高半孔率。
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| GB/T 7714 | 高文学 , 李小帅 , 胡宇 et al. 一种可拼接聚能水封爆破装置及其使用方法 : CN202110589015.6[P]. | 2021-05-28 . |
| MLA | 高文学 et al. "一种可拼接聚能水封爆破装置及其使用方法" : CN202110589015.6. | 2021-05-28 . |
| APA | 高文学 , 李小帅 , 胡宇 , 刘江超 , 宋肖龙 . 一种可拼接聚能水封爆破装置及其使用方法 : CN202110589015.6. | 2021-05-28 . |
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摘要 ：
一种拉杆式装药间隔器及其使用方法，涉及爆破技术领域，其结构包括伸缩套筒、顶拉杆、U形卡扣、弹性柱状间隔器，所述的伸缩套筒为多段直径不同的PVC套筒，每段套筒上部均设有固定开关，外侧均有刻度，最外部套筒底端向外凸出一段空心圆管；所述的顶拉杆包括柱状外壳、轴槽、转轴、轴卡、锁定结构、卷筒、钢绳、复位弹簧，转轴安放在柱状外壳的轴槽内，轴卡、卷筒及复位弹簧固定在转轴上，锁定结构安装在柱状外壳的滑道内。使用时，根据炮孔长度调节伸缩套筒长度，将U形卡扣的锁头安放在间隔器底盘卡槽内，再将间隔器安放在伸缩套筒上，通过锁定结构制动转轴后，向外拉伸顶拉杆，可使弹性柱状间隔器变形膨胀卡在炮孔内，形成间隔段。
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| GB/T 7714 | 李小帅 , 高文学 , 洪政 et al. 一种拉杆式装药间隔器及其使用方法 : CN202110588969.5[P]. | 2021-05-28 . |
| MLA | 李小帅 et al. "一种拉杆式装药间隔器及其使用方法" : CN202110588969.5. | 2021-05-28 . |
| APA | 李小帅 , 高文学 , 洪政 , 徐赫 , 于伟杰 , 刘钊臣 . 一种拉杆式装药间隔器及其使用方法 : CN202110588969.5. | 2021-05-28 . |
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摘要 ：
本发明涉及一种爆破工程球状空气装药间隔器及间隔装药方法，球状空气间隔装药器，包括爪型束缚装置、提拉卡扣、束缚带、高强度弹性气体球、吊绳、拉绳。高强度弹性气体球安放在爪型束缚装置内，球体在爪型束缚装置外力作用下变形为椭球体，使整个间隔装药器径向最大尺寸小于炮孔直径，爪型束缚装置的每个爪尖设有一个限位孔，束缚带穿在限位孔中，束缚带的两端与提拉卡扣相连，提拉卡扣开关处与束缚装置顶部具有环状吊耳，提拉卡扣开关吊耳连接拉绳，束缚装置吊耳连接吊绳。使用时，通过吊绳将间隔器送入炮孔指定位置，提拉拉绳，将提拉卡扣打开，使高强度弹性气体球由椭球体恢复为圆球体卡在炮孔内，形成空气间隔段。
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| GB/T 7714 | 李小帅 , 高文学 , 张声辉 et al. 一种爆破工程球状空气装药间隔器及间隔装药方法 : CN202110588970.8[P]. | 2021-05-28 . |
| MLA | 李小帅 et al. "一种爆破工程球状空气装药间隔器及间隔装药方法" : CN202110588970.8. | 2021-05-28 . |
| APA | 李小帅 , 高文学 , 张声辉 , 宋肖龙 , 胡宇 , 马家骅 . 一种爆破工程球状空气装药间隔器及间隔装药方法 : CN202110588970.8. | 2021-05-28 . |
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摘要 ：
本发明涉及一种推入式装药间隔器及其使用方法。一种推入式装药间隔器，包括伸缩套筒、手拧螺丝、底管、推杆、弹性间隔器；外套筒在外，内套筒在内，外套筒与内套筒之间通过手拧螺丝固定，外套筒顶端外侧壁对称位置开有凹槽，弹性间隔器塞入底管下端构成配套体，底管上端内侧壁对称位置带有卡扣，将卡扣卡在外套筒凹槽，底管与外套筒连接，推杆放入伸缩套筒内。采用本装置时，携带方便，安装简捷，同时便于控制间隔器与炸药之间的悬空高度。
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| GB/T 7714 | 洪政 , 高文学 , 李小帅 et al. 一种推入式装药间隔器及其使用方法 : CN202110587896.8[P]. | 2021-05-28 . |
| MLA | 洪政 et al. "一种推入式装药间隔器及其使用方法" : CN202110587896.8. | 2021-05-28 . |
| APA | 洪政 , 高文学 , 李小帅 , 刘钊臣 , 陈军凯 . 一种推入式装药间隔器及其使用方法 : CN202110587896.8. | 2021-05-28 . |
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摘要 ：
本发明涉及一种金属露天矿爆堆品位分布测算系统及精准铲装方法，金属露天矿爆堆品位分布测算系统包括远程终端、爆堆品位采集系统、铲斗定位系统、车载移动终端。本发明通过计算机内置的爆堆品位数据库生成软件，将无人机测得的爆堆三维坐标数据与炮孔化验品位进行结合计算，形成爆堆品位数据库，经由远程终端发送至电铲移动终端，通过铲斗定位系统对铲斗斗齿的坐标进行计算，匹配爆堆品位数据库得到每一铲斗矿石品位，并且在铲斗跨越矿岩分界线时通过移动终端提醒电铲司机。解决了金属露天矿山矿石损失与贫化严重问题，提升了铲装作业的精准化程度。
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| GB/T 7714 | 李小帅 , 高文学 , 宋肖龙 et al. 一种金属露天矿爆堆品位分布测算系统及精准铲装方法 : CN202110587836.6[P]. | 2021-05-28 . |
| MLA | 李小帅 et al. "一种金属露天矿爆堆品位分布测算系统及精准铲装方法" : CN202110587836.6. | 2021-05-28 . |
| APA | 李小帅 , 高文学 , 宋肖龙 , 张声辉 , 胡宇 , 刘江超 . 一种金属露天矿爆堆品位分布测算系统及精准铲装方法 : CN202110587836.6. | 2021-05-28 . |
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