Seismic events Large-scale mining for ore in underground mines can lead to seismic activities. This means quaking or tremors occur in the bedrock. LKAB monitors the activity in its mines in Kiruna and Malmberget, and works to reduce these tremors.
LKAB KIRUNA SEISMIC EVENT INSPECTIONS AMKVO conducted over 30 flight and walking scans, at a depth of 1,236 meters below the surface, to map the damage throughout kilometers of drifts in Kiruna. “We were able to scan much faster than LKAB expected. Nearly all the areas LKAB had identified for inspection were scanned on the first day.
This is measured with completely different instruments which are not comparable with LKAB's local scale. Seismic activity is the rapid fracture of a rock mass that releases a lot of energy. The majority of such events near LKAB mines – sometimes several hundred to a thousand a day – are so minor that they cannot be felt and are only measurable with sensitive instruments. Now, just over a month after the biggest seismic event ever registered by LKAB, the investigation has come a long way. In addition to accounting for the causes of the event, the investigation will also provide a basis for future decisions as to, for example, the layout of the mine, i.e., how roads and production areas will be located with respect to factors such as seismicity. 2020-12-21 · Swedish mining giant LKAB suffered a significant seismic event at their Kiruna iron ore mine. Before they were able to restart operations, they needed to gain a complete understanding of the damage.
Using their readings, both the strength and exact location of an event can be calculated. This is the reason LKAB does not measure event magnitude on the Richter Scale but uses a local scale. 2020-10-30 · The seismic event triggered rock bursts across kilometers of drifts. Armed with accurate 3D datasets, LKAB engineers were able to start planning remediation work within weeks of the event. Therefore, in this case, we have used the national seismic system. We are planning to install geophones that have a wider measurement range," says Mirjana Boskovic.
A DIGITAL DROP IN / DROP OUT EVENT 10.25 Feasibility study for seismicity forecasting in seismically active Partners: Boliden, LKAB.
- We had no warning about this and it is not possible to say when a seismic event will take place, says Fredrik Björkenwall, acting press officer at LKAB. 2020-05-19 LKAB last reported a seismic event occurred at Kiruna on April 19, saying its preliminary magnitude was 1.77 according to the local scale. Kiruna's ore is mined at a depth of more than 1,000m and LKAB KIRUNA SEISMIC EVENT INSPECTIONS AMKVO conducted over 30 flight and walking scans, at a depth of 1,236 meters below the surface, to map the damage throughout kilometers of drifts in Kiruna. “We were able to scan much faster than LKAB expected.
LKAB's Kiirunavaara Mine is a large, underground, sub-level caving mine that has been seismically active since approximately 2008. With this seismic activity
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lkab.com We would like to show you a description here but the site won’t allow us With appropriate management, the number and magnitude of induced seismic events can be decreased, significantly reducing the probability of a damaging seismic event. Induced seismicity in Basel led to suspension of its HDR project. A seismic hazard evaluation was then conducted, which resulted in the cancellation of the project in December 2009. 2021-01-20 · Seismic events are occurrences in which energy is briefly released in the Earth's crust, resulting in a series of seismic waves which move through the crust. In some cases, the energy can be intense enough that it is felt in the form of an earthquake, while in other seismic events, the energy is so mild that it can only be identified with specialized equipment.
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Reliable automatic processing of seismic events: solving the Swiss cheese problem W Törnman Luleå University of Technology, and LKAB, Sweden J Martinsson Luleå University of Technology, and LKAB, Sweden Abstract BEMIS (Bayesian estimation of mining-induced seismicity) is a fully automatic, near real-time, robust and
on May 18th. The event had a magnitude 3.3 on the local magnitude scale and occurred at a level of -1,146 metres (from zeroing point) in the mine's foot-wall. The mine was evacuated and 13 people who were at work under ground left their work sites and returned to surface level. Swedish mining giant LKAB suffered a significant seismic event at their Kiruna iron ore mine.