Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations

Lutovac, Suzana; Medenica, Dragan; Gluščević, Branko; Tokalić, Rade; Beljić, Čedomir

doi:10.3390/en9080617

Cited by 3 publications

(3 citation statements)

References 3 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“….., N − 1) we will get one broken line. In so doing, the area bounded by x-axis, line segments x 1 M 1 and x N M N and broken line, consisting of (N − 1) trapezoid [12,13], has the value:…”

Section: Model 3-determining the Parameters Using The Linear Connectimentioning

confidence: 99%

Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

et al. 2018

Self Cite

View full text Add to dashboard Cite

The explosion caused by detonation of explosive materials is followed by release of a large amount of energy. Whereby, a greater part of energy is used for rock destruction, and part of energy, in the form of seismic wave, is lost in the rock mass causing rock mass oscillation. Investigations of the character and behavior of the pattern of seismic wave indicate that the intensity and nature of the seismic wave are influenced by rock mass properties, and by blasting conditions. For evaluation and control of the seismic effect of blasting operations, the most commonly used equation is that of M.A. Sadovskii. Sadovskii's equation defines the alteration in the velocity of rock mass oscillation depending on the distance, the quantity of explosives, blasting conditions and geological characteristics of the rock mass, and it is determined based on trial blasting for a specific work environment. Thus, this paper offers analysis of the method for determination of parameters of the rock mass oscillation equation, which are conditioned by rock mass properties and blasting conditions. Practical part of this paper includes the experimental research carried out at Majdanpek open pit, located in the northern part of eastern Serbia and the investigations carried out during mass blasting at Nepričava open pit, located in central Serbia. In this paper, parameters n and K from Sadovskii's equation were determined in three ways-models in the given work environment. It was noted that, in practice, all three models can be successfully used to calculate the oscillation velocity of the rock masses.

show abstract

Section: Model 3-determining the Parameters Using The Linear Connectimentioning

confidence: 99%

Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Coefficient is conditioned by ground characteristics, as well as blasting conditions, where the explosive amount is given by way of the volume. K is determined by terrain surveying [13]; n-coefficient of seismic waves suppression on the expansion path, which is an exponent, conditioned by ground properties and mining conditions and determined by field measurements as well; Q-quantity of explosives (kg); and R-distance from the endangered facility/buildings (m).…”

Section: Seismic Shaking Of the Ground Surface In Blastingmentioning

confidence: 99%

“…K and n parameters are conditioned by ground characteristics and blasting conditions, thereby v is the decreasing convex function of the variable R [13]. Monitoring in the first years of mine work provide data which is mathematically processed using the least-squared method and fit curve, and the result is numerical value of parameters K and n from Equation (2) [14].…”

Section: Seismic Shaking Of the Ground Surface In Blastingmentioning

confidence: 99%

Determination of Seismic Safety Zones during the Surface Mining Operation Development in the Case of the “Buvač” Open Pit

Malbašić

Stojanović

2018

Minerals

View full text Add to dashboard Cite

Determination of the blasting safety area is a very important step in the process of drilling and blasting works, and the preparation of solid rock materials for loading. Through monitoring and analysis of the negative seismic effects to the objects and infrastructures around and at the mine area, we were able to adapt the drilling and blasting parameters and organization of drilling and blasting operation according to the mining progress so that the affected infrastructures could be protected. This paper analyses the safety distances and model safety zones of drilling and blasting for the period 2013-2018 at the open pit at "Buvač", Omarska. This mathematical calculation procedure can be used during the whole life of the mine. By monitoring of the blasting seismic influence in first years of the mine's work, as well as by using recorded vibration velocities, mathematical dependence of the important parameters can be defined. Additionally, the level and laws of distribution and intensity of the seismic activity can be defined. On one hand, those are known quantities of the explosive and the distances between blasting location and endangered objects. On the other hand, those are coefficients of the manner of blasting and the environment where blasting is done, K, as well as the coefficient of the weakening of seismic waves as they spread, n. With the usage of the allowed vibration velocities, based on certain safety criteria and mathematical formulas of laws of spreading and intensity of seismic influence for a concrete case, it is possible to calculate explosive quantities and distances, with numerically-defined values of parameter K and n. Minimum distances are calculated based on defined or projected explosive quantities. Additionally, we calculate the maximum allowed explosive quantities based on known distances which can be used based on projected drilling-blasting parameters. For the purpose of the planning of drilling and blasting it is possible to define the allowed explosive quantities or minimum allowed distances in any area of the surface pit from the aspect of seismic safety. In the indicated case, and based on the analysis results, it is shown that in some areas of mining works in the case of the "Buvač", Omarska open pit, projected explosive quantities cannot be used. In some cases, it is even necessary to divide the explosive charge in blasting holes with additional delayers.

show abstract

Research on the Prediction Model of Blasting Vibration Velocity in the Dahuangshan Mine

Guo

Zhang

Xie³

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

In order to improve the prediction accuracy of blast vibration velocity, the model for predicting the peak particle velocity of blast vibration using the XGBoost (Extreme Gradient Boosting) method is improved, and the EWT–XGBoost model is established to predict the peak particle velocity of blast vibration by combining it with the EWT (Empirical Wavelet Transform) method. Calculate the relative error and root mean square error between the predicted value and measured value of each test sample, and compare the prediction performance of the EWT–XGBoost model with the original model. There is a large elevation difference between each vibration measurement location of high and steep slopes, but high and steep slopes are extremely dangerous, which is not conducive to the layout of blasting vibration monitoring equipment. The vibration velocity prediction model adopts the numerical simulation method, selects the center position of the small platform as the measurement point of the peak particle velocity, and studies the variation law of the blasting vibration velocity of the high and steep slopes under the action of top blasting. The research results show that the EWT–XGBoost model has a higher accuracy than the original model in the prediction of blasting vibration velocity; the simultaneous detonation method on adjacent high and steep slopes cannot meet the relevant requirements of safety regulations, and the delayed detonation method can effectively reduce the blasting vibration of high and steep slopes. The shock absorption effect of the elevation difference within 45 m is obvious.

show abstract

Some Models for Determination of Parameters of the Soil Oscillation Law during Blasting Operations

Cited by 3 publications

References 3 publications

Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

Determination of Seismic Safety Zones during the Surface Mining Operation Development in the Case of the “Buvač” Open Pit

Research on the Prediction Model of Blasting Vibration Velocity in the Dahuangshan Mine

Contact Info

Product

Resources

About