Databank

Workreport 1997-58

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Name:

Tutkimusreiän KI-KR13 syventäminen Äänekosken Kivetyssä

Writer:

Tauno Rautio

Language:

Finnish

Page count:

87

Summary:

Working report: DRILLINGS AT KIVETTY IN ÄÄNEKOSKI, EXTENSION OF THE BOREHOLE KI-KR13

ABSTRACT

Kivetty in Äänekoski is one of the four sites selected for detailed site investigations. The
detailed site investigations will be carried out during years 1993...2000

As a part of the investigation programme Suomen Malmi Oy extended the deep borehole
KI-KR13 from 300,43 m to 601,34 m at Kivetty in November 1997.

A set of control measurements and the sampling of the flushing water were carried out
during the drilling. The volume and the conductivity of the flushing water were recorded
as well as the pressure of the flushing water. The objective of these measurements was to
obtain more information from bedrock and groundwater.

Uranine was used as a label agent in the flushing water. The volume of the used flushing
water was about 83 m³. At the end of the work the borehole was flushed by pumping
about 74 m³ of water from the bottom of the borehole. The deviation of the borehole was
measured with the deviation instruments Reflex - Maxibor and Boremac D2. The
inclinations of the Maxibor measurement have been corrected based on the inclinations
of the Boremac measurement. The results of the corrected Maxibor measurement
indicate that the borehole deviates 28.66 m to the right and 18.01 m up at the depth of
581 m.

Core samples were photographed and they were logged by a geologist at the site. The
main rock types are porphyritic granite and granodiorite. However, there is also narrow
section of micagneiss. Fractures are mostly tight, only in some most fractured zones
filled fractures are dominating. The average fracture frequency is 1.58 pcs/m and the
average RQD 98.8%. The borehole penetrated 4 broken zones. The total length of the
broken zones is 7.42 m, which is 2.5 % of the total core length.

Uniaxial compressive strength, Young`s modulus and the Poisson`s ratio were measured
from core samples. The average uniaxial compressive strength is 177 MPa, the average
Young`s modulus 53 GPa and the average Poisson`s ratio 0.23.

Keywords: core drilling, borehole, fracture, granite, granodiorite, control measurements,
elastic parametres, deviation measurements




DRILLINGS AT KIVETTY IN ÄÄNEKOSKI, EXTENSION OF THE BOREHOLE KI-KR13

ABSTRACT

Kivetty in Äänekoski is one of the four sites selected for detailed site investigations. The
detailed site investigations will be carried out during years 1993...2000

As a part of the investigation programme Suomen Malmi Oy extended the deep borehole
KI-KR13 from 300,43 m to 601,34 m at Kivetty in November 1997.

A set of control measurements and the sampling of the flushing water were carried out
during the drilling. The volume and the conductivity of the flushing water were recorded
as well as the pressure of the flushing water. The objective of these measurements was to
obtain more information from bedrock and groundwater.

Uranine was used as a label agent in the flushing water. The volume of the used flushing
water was about 83 m³. At the end of the work the borehole was flushed by pumping
about 74 m³ of water from the bottom of the borehole. The deviation of the borehole was
measured with the deviation instruments Reflex - Maxibor and Boremac D2. The
inclinations of the Maxibor measurement have been corrected based on the inclinations
of the Boremac measurement. The results of the corrected Maxibor measurement
indicate that the borehole deviates 28.66 m to the right and 18.01 m up at the depth of
581 m.

Core samples were photographed and they were logged by a geologist at the site. The
main rock types are porphyritic granite and granodiorite. However, there is also narrow
section of micagneiss. Fractures are mostly tight, only in some most fractured zones
filled fractures are dominating. The average fracture frequency is 1.58 pcs/m and the
average RQD 98.8%. The borehole penetrated 4 broken zones. The total length of the
broken zones is 7.42 m, which is 2.5 % of the total core length.

Uniaxial compressive strength, Young`s modulus and the Poisson`s ratio were measured
from core samples. The average uniaxial compressive strength is 177 MPa, the average
Young`s modulus 53 GPa and the average Poisson`s ratio 0.23.

Keywords: core drilling, borehole, fracture, granite, granodiorite, control measurements,
elastic parametres, deviation measurements




Keywords:

kairaus; kairanreikä; rako; graniitti; granodioriitti; tarkkailumittaukset; muodonmuutosominaisuudet; sivusuuntamittaus

File(s):

Tutkimusreiän KI-KR13 syventäminen Äänekosken Kivetyssä (pdf) (2.3 MB)


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