A Comprehensive Evaluation Method of Bench Blast Performance in Open-Pit Mine

Liu, Mingqing; Liu, Jun; Zhen, Mengyang; Zhao, Futian; Xiao, Zhimin; Shan, Pengfei; Wang, Yue; Ou, Chen; Zheng, Haowen; Lei, Zheng

doi:10.3390/app10165398

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…Blast waves have different characteristics that can be extracted using Fourier transform [27], wavelet transform, and fractal analysis [28][29][30]. The wavelet wave signal decomposition is used to derive the wavelet coefficients.…”

Section: Methodsmentioning

confidence: 99%

Digital Processing of Seismic Data from Open-Pit Mining Blasts

Koteleva

Frenkel

2021

Applied Sciences

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This article describes an approach of mathematical processing of signals (seismograms) from five blasthole charges from experimental blasting, each 3 m deep, with equal explosive weight (1 kg), and equidistant (3 m) from one other. The seismic explosive waves were measured at a 13 to 25 m distance. This article provides spectral analysis, wavelet analysis, and fractal analysis results. It defines the dependence of dominant frequency and amplitude on the distance to the blast center. According to the experimental data, the dominant frequency is calculated as y = 1.0262x0.2622 and the amplitude dependency as y = 18.139x−2.276. Furthermore, the analysis shows that 80% of the entire signal is concentrated in half the area of frequency range, i.e., the low frequency zone is of the most interest. This research defines the dependence of distance on the energy value of signal wavelet analysis. It is demonstrated that, according to the experimental data, the 12th frequency range is closely correlated with the distance values. This article gives the definitions of entropy, correlation dimension, and predictability time. This experiment shows that entropy and correlation dimension decrease but predictability time increases when the distance to the blast center increases. This article also describes the method for determining optimal drilling and blasting parameters, and concludes with the possibility of applying the analytical results to predicting and enhancing drilling and blasting operations.

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Section: Methodsmentioning

confidence: 99%

Digital Processing of Seismic Data from Open-Pit Mining Blasts

Koteleva

Frenkel

2021

Applied Sciences

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“…In addition, large open-pit mines in China are mainly located in remote areas such as Xinjiang and Inner Mongolia, where the ecological environment consists mostly of fragile Gobi or grasslands [3], and the open-pit mining operations [4] have caused large-scale damage to the geological structure and vegetation in these areas [5,6]. In the past 10 years, the large-scale development and construction of open-pit coal mines has caused the destruction of surface vegetation [7], exacerbated desertification in mining areas, and accelerated the degradation of local ecosystems [8,9].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Land Saving and Loss Reducing and Slope Stability Variation Patterns in Open-Pit Mine

Guo

Zhou

et al. 2021

Geofluids

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This study presents different land saving and loss reducing schemes. Comprehensively compare the economic benefits of the schemes. It is shown that the optimal scheme can recover tons of coal resources on the south slope, creating significant economic benefits. Numerical simulation was utilized to analyze the changes of slope stability, deformation, and shear strain increment in the process of land saving and loss reducing. Results found that the slope stability decreases rapidly, and the toe of the slope has to be internally discharged in time to compress the slope. Timely follow-up of in-slope rows can improve slope stability. The position of the slope shear exit changes with the increase of the distance of the inner row, and its stability increases gradually. When the distance of the lower inner row exceeds 120 m, the increase of the internal row distance has little influence on the slope stability. When the inner distance exceeds 60 m in the process of internal dumping of upper platform, the position of potential sliding plane gradually changes from the lower dump to the upper and lower dump with the increase of inner dumping distance. It shows that the stability of the dump will be damaged if the upper dump continues to be discharged. Therefore, the distance between the upper and lower dump sites is more important than 60 m. The stability of the south slope is good in the process of mining and internal drainage, and the overall stability of the south slope is controllable, based on slope radar monitoring.

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“…The manual, automatic, and semiautomatic methods had been used to characterize discontinuity traces using photographs of rock exposures, and the case studies on actual rock images were taken to conduct comparative analyses to quantify the accuracy of fracture detection and characterization [11,14] Fragmentation is an important operation in order to control and minimize the loading, hauling, crushing, classification, and processing costs in mining and minerals engineering [15][16][17][18]. Many methods based on photo-analysis were proposed to estimate the size distribution of rock fragments [19][20][21][22]. The aforementioned methods were performed by hand or through image processing techniques by computer, which must delineate the individual rock fragments in an image.…”

Section: Introductionmentioning

confidence: 99%

Digital Image Processing Method for Characterization of Fractures, Fragments, and Particles of Soil/Rock-Like Materials

Zhou

et al. 2021

Mathematics

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Natural soil and rock materials and the associated artificial materials have cracks, fractures, or contacts and possibly produce rock fragments or particles during geological, environmental, and stress conditions. Based on color gradient distribution, a digital image processing method was proposed to automatically recognize the outlines of fractures, fragments, and particles. Then, the fracture network, block size distribution, and particle size distribution were quantitatively characterized by calculating the fractal dimension and equivalent diameter distribution curve. The proposed approach includes the following steps: production of an image matrix; calculation of the gradient magnitude matrix; recognition of the outlines of fractures, fragments, or particles; and characterization of the distribution of fractures, fragments, or particles. Case studies show that the fractal dimensions of cracks in the dry mud layer, ceramic panel, and natural rock mass are 1.4332, 1.3642, and 1.5991, respectively. The equivalent diameters of fragments of red sandstone, granite, and marble produced in quasi-static compression failures are mainly distributed in the ranges of 20–40 mm, 25–65 mm, and 10–35 mm, respectively. The fractal dimension of contacts between mineral particles and the distribution of the equivalent diameters of particles in rock are 1.6381 and 0.8–3.6 mm, respectively. The proposed approach provides a computerized method to characterize quantitatively and automatically the structure characteristics of soil/rock or soil/rock-like materials. By this approach, the remote sensing for characterization can be achieved.

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A Comprehensive Evaluation Method of Bench Blast Performance in Open-Pit Mine

Cited by 7 publications

References 15 publications

Digital Processing of Seismic Data from Open-Pit Mining Blasts

Digital Processing of Seismic Data from Open-Pit Mining Blasts

Optimization of Land Saving and Loss Reducing and Slope Stability Variation Patterns in Open-Pit Mine

Digital Image Processing Method for Characterization of Fractures, Fragments, and Particles of Soil/Rock-Like Materials

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