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Effect of explosive charge-blast distance interaction on ground damage (Boukhadra mine, Algeria)

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Category: Solid State Physics, Mineral Processing

Last Updated on 07 January 2019

Published on 26 December 2018

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Authors:

O.Kamli, Kasdi Merbah University, Ouargla, Algeria, email: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.Boutaleb, Dr. Sc. (Tech.), Prof., Kasdi Merbah University, Ouargla, Algeria, email: This email address is being protected from spambots. You need JavaScript enabled to view it.

M.C.Djouama, PhD, Laboratory of Physical Metallurgy and Materials Properties, Badji Mokhtar University, Annaba, Algeria

M.Hacini, Dr. Sc. (Tech.), Prof., Kasdi Merbah University, Ouargla, Algeria, email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. The aim of this research work is to assess the effect of the explosive charge and the blast distance on the stability of the Boukhadra iron mine. The objective is to contribute to the conception of a blasting plan in order to reduce the effect of the vibrations on the slope stability and ground damage.

Methodology. The characterisation of the blasting process was done using geophones to record the particle velocity for sixteen tests, and the DELTA SEIS software to determine the ground displacement influenced by the particle velocity. We also used the PLAXIS 8.2 software to simulate the slope stability under the effect of blasting by calculating the safety factor for the entire mine.

Findings. We concluded that the blasting itself is not the main cause of the slope instability, since the cause of instability is conditioned by structural, blend and phase composition of slope rocks and peculiarities of physicochemical interaction with propagating blast and elastic waves caused by explosive charge blast.

Originality. Numerical simulation of ground displacement under the effect of blasting was performed with the use of two different tools: geophones assisted by the Delta SEIS characterising certain blasting results and the PLAXIS 8.2 software. It was found that “the mass of explosive charge – explosive charge-blast distance” being 130 kg and 177 m respectively leads to a peak particle velocity of 16 mm/s and acoustic overpressure of 147 dB causing a ground displacement of 335 µm.

Practical value.  The results are used while preparing technical specifications for conducting drilling-and-blasting operations, which allowed increasing slope stability regarding the effect of blast and elastic waves significantly. In the process of stimulation we found that we found that a safety factor Fs is 0.90 (less than one), which certainly leads to the slope sliding.

References.

1. Hongge, P., Quingxiang, C., Li, M. and Wenliang, T., 2014. End-Wall Slope Stability Analysis of Surface Coal Mine under the Combined Open-pit Mining with Underground Mining. EJGE, 19, Bund. A., pp. 185–194.

2. Parida, A. and Michra, M. K., 2015. Blast Vibration Analysis by Different Predictor Approaches ‒ A Comparaison. Procedia Earth and Planetary Sience, Science Direct, 11, pp. 337‒345.

3. Ramchandar, K., Sastry, V. R. and Chirauth, Hegde, 2017. A critical comparison of regression models and artificial neural network to predict ground vibrations. Geotechnical and geological engineering, Springer, 35(2), pp. 573‒583.

4. Blair,A. C., 2015. A novel powder factor based bench blast design method for large surface coal mines. Missouri university of science and technology.

5. Saffari, A., Sereshki, F., Ataei, M. and Ghanbari, K., 2013. Applying Rock Engineering Systems (RES) approach to Evaluate and Classify the Coal Spontaneous Combustion Potential in Eastern Alborz Coal Mine. IJMGE Int. J. Min.& Geo-Eng., 47(2), pp. 115‒127.

6. Tripathy, G. R., Shirke, R. R. and Kudale, M. D., 2016. Safety of engineers structures against blast vibrations: A case study. Journal of rock mechanics and geotechnical engineering, Science Direct, 8(2), pp. 248‒255.

7. Mohamed, A. M. E. and Mohamed, A. E. A., 2013. Quarry blasts assessment and their environmental impacts on the nearby oil pipelines, southeast of Helwan City, Egypt. NRIAG Journal of Astronomy and Geophysics, 2, pp. 102–115.

8. Kumar, R., Choudhury, D. and Bhargava, K., 2016. Determination of blast-induced ground vibration quations for rock using mechanical and geological. Journal of Rock Mechanics and Geotechnical Engineering, 8, pp. 341‒349.

9. Gadri, L., Boumazbeur, A., Nouioua, I. and Boukeloul, M. L., 2012. The Classification Systems as a Tool to Estimate the Stability of Discontinuous Rock Mass ‒ A Numerical Approach: The iron mine of Boukhadra (Algeria) as a case study.EJGE, 17, Bund. D., pp. 419‒433.

10. Ecuyer, N., 2016. Incidence of blast vibrations produced by the St-Jean Chrysostom BML quarry on soils and buildings in the constellation area. AECOM-Study, pp. 9‒16.

11. French Group of Explosive Energy and Blasting Vibrations, 2014. Practical Guide to Mining, mines and quarries. N 211, February, pp. 48‒68.

12. Brinkgreve, R. B. J. and Broere, W., 2016. Plaxis manuals: Plaxis 2D version 8.2. Delft University of Technology and Plaxis b.v., the Netherlands, pp. 18.

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