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Web-GIS Based Visualization System of Predicted Ground Vibration Induced by Blasting in Urban Quarry Sites

Blasting is one of the excavating technique and the operation that breaks rocks using explosive. Blasting is routinely carried out at various resource extraction sites. As a consequence, when an instantaneous blast is caused by using large amounts of explosives, ground vibrations will propagate from the site to the adjacent areas. Besides, blasting generates problems such as fly rock, dust and fumes. The company which is running the site needs to exercise caution and apply solutions so that these problems do not adversely affect the surrounding environment.

In this study, a prediction and visualization system for ground vibrations was developed for the purpose of reducing the adverse psychological effects of blasting. The system consisted of predicting ground vibration using an Artificial Neural Network (ANN) and visualizing it on an online map using Web-GIS.

A prediction model using ANN that learned the optimum weight by taking 50 sets of data indicated a regression value of 0.859 and a Mean Square Error (MSE) of 0.0228. Compared with previous researches, these values are not bad results. Peak Particle Velocity (PPV) was used as a metric to measure ground vibration intensity. A color contour was generated using GIS tools based on the PPV value of each prediction point. The system was completed by overlaying the contour onto a basic map in a website.

The basic map showed the surrounding area through the use of Google Maps data. This system can be used by anyone with access to the internet and a browser, requiring no special software or hardware. In addition, mining operations can utilize the data to modify blasting design and planning to minimize ground vibration.

In conclusion, this system has the potential to alleviate the worries of surrounding residents caused by ground vibrations from blasting due to the fact that they can personally check the predicted vibration around their locale. Furthermore, this system may be widely used not only for visualization of ground vibrations induced by blasting of resource extraction sites but also for research in other fields.

Article by Youhei Kawamura, et al, from Japan and Australia.

Full access: http://t.cn/EtB9161

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