Propagation and prediction of blasting vibration on slope in an open pit during underground mining

Jiang, Nan; Zhou, Chuanbo; Lu, Shiwei; Zhang, Zhen

doi:10.1016/j.tust.2017.09.005

Cited by 60 publications

(19 citation statements)

References 27 publications

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“…is model is subject to a plastic kinematic model. Due to a large number of numerical simulation tests involved in this study, the adoption of this model can achieve high calculation efficiency; furthermore, this model can be used to realize the simulation of the explosion cavity by defining failure strain parameters [25][26][27]. e detailed parameters of the stratum are summarized in Table 2.…”

Section: Materials Parameters and Modelsmentioning

confidence: 99%

Influence of Seismic Source Parameters on the Excitation Wavelet in Seismic Explorations Based on Numerical Simulation

Qiu

Zeng

et al. 2020

Advances in Civil Engineering

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Explosives are the most common seismic source in seismic explorations, whose excitation effect is closely associated with their properties, weight, buried depth, and charging constitution. This study analyzes the influence of seismic source parameters on the features of the explosion wavelet. The explosion process of the seismic source in marine carbonate is numerically simulated with the finite element software LS-DYNA. We consider three parameters, including buried depth, charge weight, and decoupling coefficient. To verify the simulation outcomes, we also carry out field observations. The appropriate buried depth of the explosive should be determined according to stratum lithology. As the charge weight increases, low-frequency energy of the source wavelet increases rapidly. The optimum charge weight is 16–18 kg, and the ideal charging structure is in a concentrated, short-column shape. Compared with the buried depth and charge weight, the decoupling coefficient shows more noticeable influence on the excitation effect of the source wavelet, and the optimum coefficient lies between 2.5 and 3. The results of this study may provide reference data for designing explosion parameters in field seismic explorations.

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Section: Materials Parameters and Modelsmentioning

confidence: 99%

Influence of Seismic Source Parameters on the Excitation Wavelet in Seismic Explorations Based on Numerical Simulation

Qiu

Zeng

et al. 2020

Advances in Civil Engineering

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“…Research on the transition from open-pit to underground mining in China began around the 1990s, with many researchers conducting bottom friction modeling experiments [6,7], physical modeling tests [8][9][10], numerical simulations [11][12][13][14], combined numerical and physical simulations [15][16][17][18], and field measurements [19][20][21][22]. Recently, a mathematical model was established to describe the attenuation of peak particle velocity (PPV) in the open-pit slope, which is used to evaluate the influence of underground mine blasting on the slope stability [23]. Cheng et al used the Universal Distinct Element Code (UDEC) numerical method to simulate the movement of strata in the footwall caused by underground mining [24].…”

Section: Introductionmentioning

confidence: 99%

Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining

Shuang-suo

Wang

et al. 2021

Geofluids

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The macro-micro mining response of the surrounding rock and overlying strata towards the transformation from open-pit to underground mining is examined in the present study, based on the engineering background of the Jinning phosphate mine (Yunnan Phosphate Chemical Group Co., Ltd.) via simulations involving similar materials, digital photographic measurement technology, and numerical simulation. The mining deformation of the surrounding rock underground, and of the overlying strata, is shown to develop in three stages, namely: (1) small and local deformation, (2) continuous linear increase, and (3) the violent nonlinear collapse of the entire system. The internal distribution of stress in the surrounding rock and adjacent overlying strata of the inclined mined-out area is complicated. The degrees of pressure increase and pressure relief have an important relationship with the size of the mining space. The pressure relief is more complete close to the mined area, and the stress reduction decreases with increasing distance. The cracks propagate in arc shapes and have a tendency to penetrate into the upper and lower ends of the stope. The size of the excavation space plays a key role in the generation, propagation, and penetration of the cracks. Due to the disturbance of the first mining level and the increase in excavation depth, the rate of damage to the surrounding and overlying rock increases in the second mining level. This process generates more cracks, which accelerate the instability of the surrounding rock and overlying strata.

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“…ere are many extensive studies on the impact of rock blasting excavations on open-pit slopes and tunnels [1][2][3]. For example, Jiang et al established a mathematical model to describe the attenuation of the PPV on open-pit slopes subjected to underground mining blasting [4]. Li et al proposed a method to predict the time history of blast vibration on high slopes, from which a blast vibration spectral control scheme was presented [5].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Bench Blasting Vibration on Slope and Safety Threshold of Blasting Vibration Velocity to Undercrossing Tunnel

Zhong

Liu

et al. 2021

Shock and Vibration

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The reconstruction and expansion project of oil reserve base often faces the excavation and blasting of the slope and undercrossing tunnel at the same time. Due to the flammable and explosive liquid storage nearby, the tight construction period, and the high requirements of collaborative construction, once the blasting accident occurs, the consequences are unimaginable. To facilitate safe and timely cooperative blasting construction of the slope and undercrossing tunnel, a vibration monitoring test of the slope and tunnel surrounding rock is conducted. The vibration response characteristics of the rock surrounding the slope and tunnel are analyzed, and a mathematical prediction model for the peak particle velocity (PPV) with consideration of the influence of the relative slope gradient (H/D) is established based on dimension analysis theory, which improves the prediction accuracy of PPV at the slope surface. ANSYS/LS-DYNA is used to establish a 3D finite element model for the slope and tunnel, and the dynamic response of the tunnel surrounding rock under blasting load is verified through field monitoring data. A linear statistical relationship between PPV and effective tensile stress (ETS) of the tunnel surrounding rock is established. The PPV safety criterion of the tunnel surrounding rock under blasting load is proposed to be 10 cm/s according to the first strength theory, and hence, the minimum safety distance from the tunnel working face to the slope surface is calculated to be 36 m. Finally, the excavation timing arrangement of the slope and tunnel is proposed, which has been successfully applied to the expansion project, and the construction period has been effectively shortened by 45 days while ensuring construction safety. The research results have great guiding significance to similar cooperative blasting excavation engineering for high slope and adjacent tunnel with safety and efficiency.

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Propagation and prediction of blasting vibration on slope in an open pit during underground mining

Cited by 60 publications

References 27 publications

Influence of Seismic Source Parameters on the Excitation Wavelet in Seismic Explorations Based on Numerical Simulation

Influence of Seismic Source Parameters on the Excitation Wavelet in Seismic Explorations Based on Numerical Simulation

Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining

Prediction of Bench Blasting Vibration on Slope and Safety Threshold of Blasting Vibration Velocity to Undercrossing Tunnel

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