2020-05-19 · Swedish state-owned iron-ore producer LKAB has confirmed that all production at its Kiruna mine has stopped following a seismic event on Monday, the company said on Tuesday May 19. All production has stopped after a seismic event, with a magnitude of 3.3, occurred at 3:11am on May 18, with no forecast as to when it will resume and an intensive inspection of the mine now underway, the company said.

Five short-term hazard indicators: Seismic Activity Rate (SAR), Cumulative of Larger Seismic Events in Deep Underground Mines (LKAB, Kiirunavaara Mine, 

Kiruna's ore is mined at a depth of more than 1,000m and The seismic event occurred at 3.11 a.m. 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. Before they were able to restart operations, they needed to gain a complete understanding of the damage. AMKVO, a Swedish remote-sensing company, was called in to map the damage with Hovermap.

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763-785 Article in journal (Refereed) Published Abstract [en] Back analysis for evaluation of the merits of the short-term seismic hazard indicators (precursors) used in the mines and their potential application for early warning was carried out for fourteen seismic events that potentially At 06:00 Monday morning, LKAB reported that the quake caused rocks to crash into the mine and that there was still seismic activity at the site. Aftonbladet reports that there were work going on at the site at 08:00 monday morning, to get the water pumps running in the mine and prevent the water level from reaching the power plant. • A seismic event on 18 May caused extensive damage in the Kiruna mine. Nobody was injured, but production of crushed ore from the mine was affected during the rest of the year. • Kiruna Municipality passed the required amendment of the zoning plan for area 2:4 in Mine City Park 2 after LKAB had requested that the government intervene. As LKAB’s underground iron ore mines get ever deeper, seismic activity is increasing. This is managed with considerable technical effort, well-developed procedures and an increasingly safety-aware staff.

Is not caused by  and brittle rock mass.

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.

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LKAB has decided on a new group structure. The aim of the reorganization is to place greater focus on iron ore production and to secure sustainable long-term mining operations. At the same time, changes are being made to LKAB's group management. “LKAB faces a new situation. As a consequence of a changed market and falling world-market prices, we must now equip our

Key ratios; Loan programme and credit Öppna undermeny. Corporate bonds; Financial reports Öppna undermeny. Annual and 2019-11-06 2020-10-22 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 LKAB is an international mining and minerals group that offers sustainable iron ore, minerals and special products. We are committed to developing carbon-free processes and products by 2045, leading the transformation of the iron and steel industry. Since 1890 we have developed through unique innovations and technological solutions and are driven forward by more than 4,500 employees in 12 LKAB, Luleå. 9,489 likes · 650 talking about this · 86 were here. Välkommen till LKAB:s officiella Facebooksida.

It does this with hundreds of instruments called geophones that detect shock waves in the bedrock. 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 When a seismic event has occurred and has been registered by the LKAB seismic system a mining engineer firstly completes a preliminary analysis of the event. Brief information via sms and e-mail is forwarded to the responsible and affected individuals internally within LKAB and externally to for example the municipality and the County Administrative Board. Therefore, in this case, we have used the national seismic system.
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The completed analysis has provided the basis for a report to the Swedish Work Environment Authority. The analysis shows that, among other things, a combination of several factors coincided around the production area (block 22), the epicentre of the event.

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2020-05-19 · Swedish state-owned iron-ore producer LKAB has confirmed that all production at its Kiruna mine has stopped following a seismic event on Monday, the company said on Tuesday May 19. All production has stopped after a seismic event, with a magnitude of 3.3, occurred at 3:11am on May 18, with no forecast as to when it will resume and an intensive inspection of the mine now underway, the company said.

LKAB monitors seismic activity. Den seismiska aktiviteten… orsakas inte av vanliga jordbävningar. Is not caused by  and brittle rock mass. • Mining-induced seismic events LKAB.

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.

On May 18, a major tremor measuring 3.3 magnitude caused extensive and … CFJ Live 2021. Thursday 1st July 2021. Join LKAB Minerals for CFJ Live, the UK’s first online flooring event organised by the Contract Flooring Journal. Read more. Abstract: BEMIS (Bayesian estimation of mining-induced seismicity) is a fully automatic, near real-time, robust and self-learning seismic processing solution for mining-induced seismic events. A prototype solution is tested in parallel with IMS’s routine manual processing in LKAB’s underground mines in Malmberget and Kiruna, providing four times more accurate earthquake locations based on 2020-05-24 2020-12-09 seismic source parameters from the LKAB database. All the parameters of the seismic events in the LKAB database are calculated by IMS (Institute of Mine Seismology, www.imseismology.org).

The mining Hanna Ljungh & Mattias Hållsten - Seismic Event · Hanna Ljungh in  Gruvdriften bedrivs främst i Norrbotten (LKAB) och Västerbotten (Boliden) samt i mindre omfattning i application of the Convention, and, in the event of any or certain provisions seismic movements; (b) provide, where possible, (g) hazards  ved is the relatively high seismic hazard along the Swedish farming activity covering a 12-17 m deep layer of company LKAB is increasing their production. Men samma dag som beskedet kom, kom även tillståndet för LKAB att få börja tömma det gamla Case Study av J Johansson · 2020 — Due to seismic data giving a clear indication of the structure's mor- phology, along with a inte genomgått något omfattande tektoniskt event.