Monitoring Networks and Mapping Rock Behavior using Microseismic

Course Presented in English and Spanish

Presented by: ESG Solutions

Date: November 14th AM, 2017

Part 1: Seismic Monitoring design, Appropriate Instrumentation and Implications for Data Analysis 

Operators are faced with many challenges to ensure that safe, effective and efficient extraction of ore occurs. They rely heavily on microseismic systems installed throughout the mine to identify changes in rock response due to mining, to pre-emptively assess rock conditions and therefore to minimize the impact of catastrophic failures for people and on mine workings.  But systems installed can consist of different types of sensors, utilize assorted recording rates and sensor layouts.  In this section we discuss the purposes of currently installed systems, types of instrumentation and why one would use particular sensor type, the advantages of monitoring with various frequency ranges.

Part 2: Approaches for Identifying Stress Perturbations Leading to Potentially Hazardous Mining Conditions

We expand on the discussion in Part 1 by considering appropriate recording geometries and their use in identifying changes in stress behavior with mining leading to rock mass instabilities. Here we will discuss two different analysis approaches, namely, the collective behavior of seismicity and its relation to deformation, critical stress levels, and the transfer of stress within the rock mass, and secondly mapping the changes in velocity structure with extraction.  Initial presentations will focus on the techniques followed by case studies outlining how mines, block cave and stope extraction, where these approaches are used to track stress perturbations and can be further utilized to assist in excavation decision making to reduce risk associated with catastrophic events.

Workshop Format

  • Key presentations of 20-30 minutes in duration delivered by topic experts:
    • Basics of Seismicity, location, source parameters, magnitude scales, source mechanism
    • Selection of seismic sensors based on application, data processing, filtering, 3D velocity model
    • Tomographic imaging & dynamic parameters to understand stress/strain/damage
    • Seismic analysis after Destress blasting to assess rock mass stress
  • Expert facilitated roundtable discussions on key points raised during the key presentations
  • Open group discussion of recommended observations from the roundtable discussions
  • Wrap-up statement of findings to be compiled and sent to all participants
  • Post the workshop, experts will be available to discuss operator specific questions related to their operations

Note: Operators are encouraged to submit specific discussion questions prior to the workshop so that they can be addressed during as part of the breakout discussion sessions. Please send questions to Maria.Trujillo@esgsolutions.com

This workshop will be conducted in English and Spanish, and will be led by Dr. Ted Urbancic, Dr. Zara Anderson, and Tony Butler from ESG Solutions.

Please register link to https://www.esgsolutions.com/RASIM9WorkshopRegistration or contact Maria.Trujillo@esgsolutions.com . If you are an existing ESG client please indicate in the “comments” section on the registration form. Space is limited and participation is not guaranteed.