Mine Fracturing Monitoring Analysis Based on High-Precision Distributed Wireless Microseismic Acquisition Station

Abstract

A large number of shallow fossil fuel energy sources have been exhausted, including coal, oil, natural gas, and other non-renewable energy sources with rapid industrial development. The mining of fossil fuel energy has gradually shifted to the deep layers of the stratum, where safety is more difficult to guarantee. As a result, the development of a data acquisition system that can be used for microseismic monitoring and disaster prediction is imminent. In this study, in order to complete the design of a highprecision acquisition circuit, main control circuit, and other hardware circuits, the authors developed a set of high-precision distributed wireless microseismic acquisition stations, which was combined with threecomponent geophones to complete a microseismic monitoring system. This monitoring system was then verified through on-site work during the construction of a coal mine in China. This paper focuses on a detailed analysis of the data collected by the acquisition stations. Firstly, twelve sets of acquisition stations were used to conduct fixed-location blasting tests of the mine, which yielded good test results. Secondly, an analysis of microseismic monitoring data obtained during deep-well fracturing was carried out, and prefracturing static monitoring, carbon dioxide monitoring, fracturing monitoring, and post-fracturing static monitoring were also completed. This paper provides a detailed introduction to fracturing monitoring data of mines, combining discussions on the other three types of mine monitoring to reach relevant conclusions.

Study on the damage characteristics of overburden of mining roof in deeply buried coal seam

“…Therefore, the collected microseismic signals are processed, analyzed and studied in combination with the geological parameters of the roof, which can be used as a decision basis for the development height of the fracture zone of the mining overburden roof 8 , 9 . Compared with the traditional empirical formula method, piezometric test, borehole peeping and flushing fluid consumption and unilateral downhole microseismic monitoring, the combined "underground-ground" microseismic monitoring technology improves the positioning accuracy of microseismic data in elevation, and this method is regional monitoring, with an extensive monitoring range, flexible measurement points 2 , 10 . The method is a regional monitoring method, with the characteristics of a monitoring range, flexible deployment of measurement points, real-time dynamic monitoring, and a large amount of information about the spatial distribution characteristics of roof fracture development that can be revealed by the results 11 , 12 .…”

Development of a New Multifunctional Induced Polarization Instrument Based on Remote Wireless Communication Technology

“…In recent years, the current state of relying on heavy cables for geophysical exploration has been alleviated owing to continuous advancement in communication technology. Communication technologies, including short-distance Bluetooth and IoT technologies, such as low-power IoT, Zigbee technology, and low-and medium-speed Wi-Fi transmission technologies, have been increasingly applied in geophysical instruments to improve the efficiency of field exploration and reduce the use of labor and resources [31]- [34]. In the proposed system, users can use Android mobile phones to perform remote wireless control of IP instruments through Wi-Fi.…”

Microseismic Signal Classification Based on Artificial Neural Networks

“…As a real-time, continuous, and dynamic method, microseismic monitoring has been widely used in coal mines at home and abroad in recent years [1][2][3]. e microseismic monitoring system mainly monitors rock stability by analyzing the microseismic events produced by mining activities [4,5].…”