Issues of Data Acquisition and Interpretation of Paraseismic Measuring Signals Triggered by the Detonation of Explosive Charges

Abstract

The paper tackles the issues of data acquisition during the measuring of vibrations caused by the detonation of explosive charges in various types of works (blasting in mines, demolition works, tunneling). Depending on the placement of an explosive charge (a charge detonated on the surface or a charge placed in a hole), it triggers side effects in the form of mechanical vibrations, which are propagated in the environment and may pose a hazard to buildings. In the case of propagation in the air, there is an acoustic wave and an airblast wave. For the assessment analysis on the impact of vibrations on buildings, a ground-propagated signal is used, while what is propagated by air is a disturbance. Selected examples in the paper demonstrate how an acoustic wave and an airblast wave interferes with the signal recorded by geophones. Afterwards, the paper presents the results of the tests conducted at a training area, during which various masses of explosive charges placed in different ways were detonated. The examples demonstrate that this interference may lead to the misinterpretation of recorded measurements. This paper is the first of two papers that will present the results of research into this matter and the suggested resolutions in order to eliminate this interference.

Quality Data Collection and Quality Monitoring of Smart Electric Energy Meter Based on Acceleration Sensor

“…In a narrow sense, quality data refers to the data related to product quality, such as qualification rate, number of defective products, repair rate, and straight through rate. It has prominent volatility and can be collected through simple random sampling and full inspection [5]. Kinigstein and others designed the data acquisition scheme of electric energy meter based on the combination of power line carrier and wireless communication technology [6].…”

The Influence of Vibrations Induced by Blasting Works in an Open-Pit Mine and Seismic Events in an Underground Mine on Building Structures—A Case Study

“…The dominant frequency of blast vibrations plays a crucial role in vibration persistence and its amplification or reduction characteristics in structures [22][23][24]. Several methods and models have been developed to predict and optimize blast-induced ground vibrations [25][26][27][28]. Guo and Li proposed a hybrid intelligent model using a least-squares support vector machine (LSSVM) optimized with a particle swarm algorithm (PSO) for vibration prediction [10,29].…”