Surface-Downhole Joint Real-Time Microseismic Monitoring System: A Case Study in a Coalmine Located in Sichuan Basin, China

Joint monitoring is more potent than conventional micro-seismic(MS) monitoring in understanding underground processes. With simultaneous observations from the surface and downhole, joint monitoring has shown its advantages in disaster early-warning in tunneling and mining, station deployment. However, in Sichuan Basin, China, due to the complex environment, it is intuitively more difficult to transport, install, and maintain stations on the surface. Thus, we have developed a new joint monitoring system for real-time and long-term MS observations based on novel self-developed stations. First, we developed a novel lightweight wireless MS sensor with flexible support of power supply from the battery, solar power, even alternating current for surface monitoring. Second, we also developed a wired station powered by the electricity network in the downhole for underground observation. Finally, a case study in a coal mine located in Sichuan Basin was undertaken. The result illustrates advantages of our joint monitoring system in deployment, real- and long-time joint observation.