Research on the seismic effects of blasting in the mining industry

Mosinets, V. N.; Shemyakin, E. I.

doi:10.1007/bf02501433

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…According to the Indian seismic map, the project is located in zone III, with the horizontal seismic coefficient of 0.02 m/s 2 , as per the IS code considered here. The blast vibration coefficient on the dump mass due to ongoing blasting was estimated such that the horizontal coefficient of 0.04 m/s 2 will include both seismicity and blasting (Mosinets and Shemyakin, 1974).…”

Section: Volume 122mentioning

confidence: 99%

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Safety aspects of large dragline-operated opencast mines - An overview

Golder

Roy

2022

J. S. Afr. Inst. Min. Metall.

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The Jayant opencast operation is one of the largest opencast coal mines in India. Prior to 2008 the mine experienced a number of dragline dump failures, which was a major hindrance in sustaining production. Northern Coalfields Limited (NCL) and the mine management engaged several design, research, and academic institutions to carry out dump slope stability studies, particularly of dragline dumps. Birla Institute of Technology prepared a report on the investigations in May 2009. In this paper we review the findings of the report and the measures taken to tackle the safety aspects of dragline dumps.

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Section: Volume 122mentioning

confidence: 99%

“…The dragline dump height, which varies between 60 to 100 m, and the surcharge load of the shovel dump on the dragline dump are also considered in the stability analysis (Mosinets and Shemyakin, 1974;Zaitseva and Zaitsev, 2009;Sengupta, Sharma, and Roy, 2014).…”

Section: Dragline Dump Heightmentioning

confidence: 99%

Safety aspects of large dragline-operated opencast mines - An overview

Golder

Roy

2022

J. S. Afr. Inst. Min. Metall.

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Use of piezoaccelerometers to detect seismic waves from blasting in rocks

Karpunov¹,

Misnik²,

Nefedov³

1977

Soviet Mining Science

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In view of developments in the theory of blasting and in applied problems concerning contlnuous methods of mining, and owing to the continuing increase in the size of large-scale blasts, it is necessary to study the laws of propagation of seismic waves in rocks, and to develop experimental methods of investigation based on transducers (TD) from various measurement systems.At present, in experimental fleld research to study the seismic effect from blasting, wide use is made of a method, based on inductive transducers registering the particle velocity [1][2][3], which enables us to detect waves with the following maximum parameters: displacemsnt, i0 mm; velocity, 20 m/sec; acceleration, 104; stress, 3 9 10 s kg/cma; frequency, 20 kHz.These par~-~ters of the movements of the medium during blasts in ledge rocks are characterlstic of zones 20-30 times ROz (where ROz is the radius of the charge). Measurements closer to the center of the blast do not give usable results owing to destruction of the transducers [4]. Strengthening the transducer also fails to solve the problem, because the limited frequency response of the method cannot ~n principle permit measurements at distances less than 20ROz: The reduction in the rise time as we approach the center of the blast leads to a rapid increase in the errors of measurement owing to the need to correct the signals. Correction of the rise times in the velocity traces is also necessary if small charges are used.Thus, theuse of the induction method to measure seismic waves is methodologically Justified only in research on long-period processes occurring in large-scale blasts in the zone ou=slde 20ROz.However, to get a complete representation of the wave pattern in the medium, it is necessary to have sufficient information on the par--~ters of the blast wave at any point in space, primarily in the zone of fracture. If we knew the parameters of the seismic waves in the short-range zone, we could reliably assess the pheno-~-a occurring in the medium during various stages of its fracture, and this would serve as a basis for creating technological methods of controlling the blast energy [5].Successful experiments to measure the parameters of seismic blast waves in the shortrange zone require a correct choice of the quantity to be measured. One must be guided not only by experimental feasibility but also by the acquisltlon of the necessary information.Analysis of methods of measurement of various parameters of the stress field reveals that the most informative and universal characteristics are the motion parameters of the medium [4], among whlchj from the viewpoint of experimentation under heavy dynamic loads, the acceleration is preferable [6].Acceleratlon transducers --acceleromaters (Fig. 1) --consist of a frame 1, which is an inertial element, =he deformation of which is proportional to the force acting on it, an inertial mass 2 which creates this force in proportion to the acceleration to be measured, and a plezoelement 3. In the most popular accelerometers the plezoelements are ...

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