Publications: Valgma, I.; Reinsalu, E.; Sabanov, S.; Karu, V. (2...

Publications: Valgma, I.; Reinsalu, E.; Sabanov, S.; Karu, V. (2...: Valgma, I.; Reinsalu, E.; Sabanov, S.; Karu, V. (2010). Quality control of Oil Shale production in Estonian... Quality control of Oi...

Publications: Valgma, I.; Reinsalu, E.; Sabanov, S.; Karu, V. (2...

Publications: Valgma, I.; Reinsalu, E.; Sabanov, S.; Karu, V. (2...: Valgma, I.; Reinsalu, E.; Sabanov, S.; Karu, V. (2010). Quality control of Oil Shale production in Estonian... Quality control of Oi...

Publications: HIGH SELECTIVE OIL SHALE MINING

Publications: HIGH SELECTIVE OIL SHALE MINING: Vaizene_Valgma_Iskul_jt_Oil_2013_2S_305_325.pdf   Scholar HIGH SELECTIVE OIL SHALE MINING HIGH SELECTIVE OIL SHALE MINING

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CHERIC | 연구정보 | 문헌DB | 학술지 검색

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Total 14 articles [ AuthorsValgma I ]
No.Article
1Robam K, Valgma I, Iskul R
INFLUENCE OF WATER DISCHARGING ON WATER BALANCE AND QUALITY IN THE TOOLSE RIVER IN UBJA OIL SHALE MINING REGION
Oil Shale28(3), pp.447-463 (2011)
2Valgma I, Reinsalu E, Sabanov S, et al.
QUALITY CONTROL OF OIL SHALE PRODUCTION IN ESTONIAN MINES
Oil Shale27(3), pp.239-249 (2010)
3Valgma I
OIL SHALE MINING-RELATED RESEARCH IN ESTONIA
Oil Shale26(4), pp.445-450 (2009)
4Vali E, Valgma I, Reinsalu E
USAGE OF ESTONIAN OIL SHALE
Oil Shale25(2), pp.101-114 (2008)
5Karu V, Vastrik A, Anepaio A, et al.
FUTURE OF OIL SHALE MINING TECHNOLOGY IN ESTONIA
Oil Shale25(2), pp.125-134 (2008)
6Karu V, Vastrik A, Valgma I
APPLICATION OF MODELLING TOOLS IN ESTONIAN OIL SHALE MINING AREA
Oil Shale25(2), pp.135-144 (2008)
7Reinsalu E, Valgma I
Oil shale resources for oil production
Oil Shale24(1), pp.9-14 (2007)
8Valgma I, Torn H, Erg K
The impact of infiltration dam on the groundwater regime in the Kurtna landscape reserve area
Oil Shale23(1), pp.3-14 (2006)
9Reinsalu E, Valgma I, Lind H, et al.
Technogenic water in closed oil shale mines
Oil Shale23(1), pp.15-28 (2006)
10Reinsalu E, Valgma I
Geotechnical processes in closed oil shale mines
Oil Shale20(3), pp.398-403 (2003)


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LV2014000027

LV2014000027:



Reduction of oil shale losses

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Valgma, I., Tallinn Univ. of Technology (Estonia). Dept. of Mining
Vaeizene, V., Tallinn Univ. of Technology (Estonia). Dept. of Mining
Kolats, M., Tallinn Univ. of Technology (Estonia). Dept. of Mining
Karu, V., Tallinn Univ. of Technology (Estonia). Dept. of Mining
Pastarus, J.-R., Tallinn Univ. of Technology (Estonia). Dept. of Mining
Rahe, T., Tallinn Univ. of Technology (Estonia). Dept. of Mining
Iskuel, R., Tallinn Univ. of Technology (Estonia). Dept. of Mining

Abstract:
Oil shale utilization losses reach 70% in some cases. These are closely related to legislation, backfilling and waste rock usage. Much smaller sections include production of oil, electricity and chemicals in which most of the research and development is performed today. Current urgent topics for investigating, testing and developing of oil shale mining related questions are backfilling, mechanical extracting of shale, fine separation, selective separation and optimized drilling and blasting. Reducing oil shale losses will be more actual in the future, because the depth of mining increases and the taxes for resource and pollutants are increasing as well.


Volume: no. 9/2013

Extent: p. 201-205

Language: English

Type: Conference

All titles:

"Reduction of oil shale losses"


FREQUENCY: Biennial (every two years)

START DATE: 1997

An Analysis of Vegetation Restoration on Opencast Oil Shale Mines in Estonia - Pensa - 2004 - Restoration Ecology - Wiley Online Library

An Analysis of Vegetation Restoration on Opencast Oil Shale Mines in Estonia - Pensa - 2004 - Restoration Ecology - Wiley Online Library:



Keywords:

  • Alnus glutinosa (L) Gaertn;
  • Betula pendula Roth;
  • forest plantation;
  • opencast mine;
  • Pinus sylvestris L;
  • restoration;
  • spontaneous succession

Abstract

We compared four types of 30-year-old forest stands growing on spoil of opencast oil shale mines in Estonia. The stand types were: (1) natural stands formed by spontaneous succession, and plantations of (2) Pinus sylvestris (Scots pine), (3) Betula pendula (silver birch), and (4) Alnus glutinosa (European black alder). In all stands we measured properties of the tree layer (species richness, stand density, and volume of growing stock), understory (density and species richness of shrubs and tree saplings), and ground vegetation (aboveground biomass, species richness, and species diversity). The tree layer was most diverse though sparse in the natural stands. Understory species richness per 100-m2 plot was highest in the natural stand, but total stand richness was equal in the natural and alder stands, which were higher than the birch and pine stands. The understory sapling density was lower than 50 saplings/100 m2 in the plantations, while it varied between 50 and 180 saplings/100 m2 in the natural stands. Growing stock volume was the least in natural stands and greatest in birch stands. The aboveground biomass of ground vegetation was highest in alder stands and lowest in the pine stands. We can conclude that spontaneous succession promotes establishment of diverse vegetation. In plantations the establishment of diverse ground vegetation depends on planted tree species.

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