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学者姓名：高文学
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Abstract ：
Blasting excavation of rock masses under high in-situ stress often encounters difficulties in rock fragmentation and a high boulder rate. To gain a deeper understanding of this issue, the stress distribution of rock masses under dynamic and static loads was first studied through theoretical analysis. Then, the ANSYS/LS-DYNA software was employed to simulate the blasting crack propagation in rock masses under various in-situ stress conditions. The fractal dimension was introduced to quantitatively analyze the influence of in-situ stress on the distribution of blasting cracks. The results indicate that in-situ stress primarily affects crack propagation in the later stages of the explosion, while crack initiation and propagation in the early stages are mainly driven by the explosion load. In-situ stress significantly influences the damage area and fractal dimension of cut blasting. Under hydrostatic in-situ stress, as the in-situ stress increases, the damage area and fractal dimension of blasting cracks gradually decrease. Under non-hydrostatic in-situ stress, when the principal stress difference is small, in-situ stress promotes the damage area and fractal dimension of the surrounding rock, enhancing rock fragmentation. However, when the principal stress difference is large, in-situ stress inhibits the damage area and fractal dimension of the surrounding rock, hindering effective rock breaking.
Keyword ：
in-situ stress in-situ stress blasting crack blasting crack fractal dimension fractal dimension cut blasting cut blasting
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| GB/T 7714 | Wu, Yongbo , Zhang, Xiaojun , Li, Zhuo et al. Effects of In-Situ Stress on Damage and Fractal during Cutting Blasting Excavation [J]. | FRACTAL AND FRACTIONAL , 2024 , 8 (8) . |
| MLA | Wu, Yongbo et al. "Effects of In-Situ Stress on Damage and Fractal during Cutting Blasting Excavation" . | FRACTAL AND FRACTIONAL 8 . 8 (2024) . |
| APA | Wu, Yongbo , Zhang, Xiaojun , Li, Zhuo , Gao, Wenxue , Xu, Zehui , Zhang, Yifeng et al. Effects of In-Situ Stress on Damage and Fractal during Cutting Blasting Excavation . | FRACTAL AND FRACTIONAL , 2024 , 8 (8) . |
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Abstract ：
The dynamic characteristics of the filling body are the key parameters for designing the filling ratio and evaluating the stability of an underground stope. The different environment (water-bearing state) of the filling body in the underground stope exerts a complex impact on the mechanical behavior of the filling body. Therefore, six groups of cemented filling body specimens with different states were formed and subjected to dynamic uniaxial impact tests. The effects of water content on the mechanical properties, fractal dimension, and deformation damage characteristics of the cemented backfill under dynamic load were analyzed in depth, and a dynamic damage constitutive model that considers water damage and the compaction stage was established. The results indicate the following: (1) Due to the change of the specimen from the dry state to the water saturation state, the dynamic compressive strength of the cemented filling body decreases from 5.03 Mpa to 1.79 Mpa; however, the ductility of the specimen generally increases, and the filling body specimens with different water contents mainly exhibit tensile failure. (2) There is a significant nonlinear relationship between the water content and the fractal dimension D-b of the cemented backfill specimen, and the growth rate of the fractal dimension D-b tends to slow down with the increase in the water content. (3) From the energy evolution perspective, the water content of the specimen exerts a significant effect on the elastic deformation and failure stage of the stress-strain curve, and the slope of the dissipated energy-strain curve decreases with the increase in water content. (4) Based on the Weibull distribution and damage theory, a statistical damage constitutive model of cemented backfill was established, and it was compared with the experimental curve to verify the rationality of the model. Therefore, the relationship between stress and damage and the strain curves is discussed, and it is inferred that the damage evolution curve of cemented backfill is a typical S-shaped curve that exhibits a stable development-rapid increase-tending to be gentle. This study can provide a theoretical reference for further understanding the dynamic behavior and stability of backfill under different water conditions.
Keyword ：
cemented filling body cemented filling body moisture content moisture content energy evolution energy evolution constitutive model constitutive model damage characteristics damage characteristics
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| GB/T 7714 | Hu, Yu , Li, Zhuo , Su, Yawen et al. Analyzing the Energy and Damage Constitutive of Cemented Backfill with Different Water Content under Dynamic Load [J]. | MATERIALS , 2023 , 16 (16) . |
| MLA | Hu, Yu et al. "Analyzing the Energy and Damage Constitutive of Cemented Backfill with Different Water Content under Dynamic Load" . | MATERIALS 16 . 16 (2023) . |
| APA | Hu, Yu , Li, Zhuo , Su, Yawen , Wu, Yongbo , Li, Xiaoshuai , Gao, Wenxue et al. Analyzing the Energy and Damage Constitutive of Cemented Backfill with Different Water Content under Dynamic Load . | MATERIALS , 2023 , 16 (16) . |
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Abstract ：
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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Abstract ：
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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Abstract ：
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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Abstract ：
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.
Keyword ：
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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Abstract ：
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.
Keyword ：
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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Abstract ：
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...
Keyword ：
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 et al. "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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Abstract ：
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。
Keyword ：
EEMD分解 EEMD分解 隧道爆破 隧道爆破 围岩损伤 围岩损伤 正演模拟 正演模拟 地质雷达 地质雷达
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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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Abstract ：
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.
Keyword ：
Blasting vibration Blasting vibration Whiplash effect Whiplash effect Vibration energy Vibration energy PPV PPV Rock slope Rock slope Dynamic response Dynamic response
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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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