Engineering & Mining Journal

NOV 2018

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 40 of 83

SLOPE STABILITY NOVEMBER 2018 • E&MJ 39 pressed by surface movement. However, microseismic monitoring techniques can be used to assist in characterizing rock/ structure disturbances behind the slope before movements on the surface are de- tected. By integrating microseismic in- formation with other surface monitoring and modeling results, mine operators can create a reliable assessment tool for slope management and ground control. Micro- seismic monitoring is widely available as a service package from various providers, with a range of coverage and interpretive options offered. Two examples: Mining3 offers a bespoke microseis- mic continuous monitoring service to mines with slope stability issues. Min- ing3 will design and implement the sys- tem and offer training to mine geotech- nical staff to use and interpret the data. In practice, geophones configured in small arrays are installed in shallow drill holes around slopes of concern. Seismic signals from the geophones are contin- uously recorded, time-synchronized and transferred via cables and USBs for col- lection and processing. Both strong and weak microseismic events are measured and assessed to determine their source location, energy and potential impact on slope movement. Mining3, established in 2016, is a partnership between Australia's CRC Min- ing and CSIRO Mineral Resources Group. CRC Mining, which came into being in 1991 as an entity in the government's na- tional research center program, brings to- gether Australian and international min- ing organizations in a cooperative effort to develop innovative mining and processing techniques as well as supporting equip- ment for the industry. Mining 3's research and development initiatives are directed by its mining industry members. Mining3 said it also is pursuing devel- opment of a system with automatic col- lection and incorporation of high-speed telemetry (e.g., 5G telecommunications) combined with distributed cloud com- puting and AI technology for rapid mon- itoring, processing and interpretation of results in near real time. Ontario, Canada-based ESG also pro- vides microseismic technology for mining and geotechnical applications. According to the company, its complete microseis- mic systems are easy to use, modular for simple expansion, backward compatible, and operate in a Windows environment. ESG designs and manufactures all hardware and software in-house, includ- ing its Paladin data acquisition units, geophones and accelerometers. This al- lows the company to fully customize any microseismic solution to meet specific client needs. ESG does not sell products stand-alone. They are manufactured for use as components of complete micro- seismic systems. The Paladin 5 is the latest, 32-bit version of ESG's digital microseismic recorder, and serves as the backbone of its microseismic data acquisition sys- tem. Continuous recording on all stations at once ensures that no data is missed. Unique triggering methods can be config- ured to record event data based on specif- ic criteria. The Paladin 5 incorporates a remov- able license card that controls the on- board capabilities of the recorder. Simi- lar in functionality to the legacy Paladin Sensor Interface Box (SIB), the license card comes in two forms: In its basic

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