Non-double-couple mechanisms - a tool for monitoring the mode of fracturing
Project goals
The project aims to broaden the common seismological approach to the mechanism of seismic events by searching for more general phenomena than traditional shear slip. It will allow us to use the retrieved mechanism to detect the mode of fracturing and totrack its development in time. The non-shear fracturing of rock mass is manifested by occurrence of non-double-couple components in the moment tensor. To assess the reliability of non-shear fracture retrieval, the methodology must be upgraded by complementing with non-DC error analysis. Aimed to process large amounts of data, the procedure will be automated. Two applications are foreseen: (1) Mining tremors: existence of mined-out cavities results in a specific fracturing of the rock mass different fromnatural earthquakes. Its retrieval will help to discriminate mining tremors and earthquakes, and detect various types of the tremors. (2) Hydrofracturing in industrial wells: observing the mechanism of induced seismic events will enable to map the zonesof tensile fractures and, thus, to assess the effectivity of hydrofracturing.
Keywords
Public support
Provider
Czech Science Foundation
Programme
Standard projects
Call for proposals
Standardní projekty 12 (SGA02009GA-ST)
Main participants
—
Contest type
VS - Public tender
Contract ID
205/09/0724
Alternative language
Project name in Czech
Nestřižné mechanismy - nástroj detekce módu rozrušování
Annotation in Czech
Vývoj robustní metodiky určování mechanismu seismických jevů indukovaných důlní činností a hydraulickým rozrušováním používaným v průmyslových vrtech. Využití zjištěných nestřižných charakteristik jako nástroje pro sledování způsobu rozrušení horniny:rozlišení otřes-zemětřesení,efektivita hydr.rozr.
Scientific branches
R&D category
ZV - Basic research
CEP classification - main branch
DC - Seismology, volcanology and Earth structure
CEP - secondary branch
DH - Mining industry including coal mining and processing
CEP - another secondary branch
—
10507 - Volcanology
20701 - Environmental and geological engineering, geotechnics
20702 - Petroleum engineering (fuel, oils)
20703 - Mining and mineral processing
Completed project evaluation
Provider evaluation
U - Uspěl podle zadání (s publikovanými či patentovanými výsledky atd.)
Project results evaluation
The project gone according to plan both in terms of expertise and in terms of disbursement of funds.
Solution timeline
Realization period - beginning
Jan 1, 2009
Realization period - end
Dec 31, 2011
Project status
U - Finished project
Latest support payment
Apr 16, 2011
Data delivery to CEP
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data delivery code
CEP12-GA0-GA-U/02:2
Data delivery date
May 2, 2016
Finance
Total approved costs
1,672 thou. CZK
Public financial support
1,672 thou. CZK
Other public sources
0 thou. CZK
Non public and foreign sources
0 thou. CZK
Basic information
Recognised costs
1 672 CZK thou.
Public support
1 672 CZK thou.
100%
Provider
Czech Science Foundation
CEP
DC - Seismology, volcanology and Earth structure
Solution period
01. 01. 2009 - 31. 12. 2011