Google Chrome

Mozilla Firefox

Microsoft Edge

A test laboratory for high-rise lifts to be built in a Finnish limestone mine

October 26, 2018

Lift manufacturer Kone Oyj is conducting excavation work at the Tytyri limestone mine to construct a test laboratory. Tytyri limestone mine is located in Lohja in the southern parts of Finland.

The test shaft is being excavated for testing lifts intended for medium and high-rise buildings. The side dimensions of the shaft are 10 x 10 meters, and it extends from the ground level to a depth of over 100 meters. The total duration of the project is from July 2014 to October 2015, during which time an approximate total of 34,000 meters will be drilled. The contractor for the project is Lemminkäinen Infra Oy.

At the outset of the work, a pilot hole of approximately two meters in diameter was excavated in an upward direction using the Alimak method. In this method, the raise climber runs along a toothed rail installed in the wall of the shaft. The lift features a covered working platform, and the drilling is carried out with a manually operated machine.

Once the pilot hole was complete, the expansion of the shaft was initiated in a top-down direction. Two drill rigs are used, one of which is the FlexiROC T20 R equipped with a COP 1140 rock drill. A total of 19 645 millimeter holes will be drilled in a single blasthole pattern, and bolt holes will also be drilled into the wall. The rig uses SR 28 drill rods. After completing the blasthole pattern the drill rigs will be lifted up. Blasting will take place and after cleaning the shaft from rocks, the drill rigs will be lowered into the shaft again for the next round.
Drilling one round takes about 16 hours, and there are two, three, or sometimes even four blasts a week. The shaft sinking work proceeds about three meters at a time. Because there is a tunnel underneath the shaft, the very bottom of the shaft cannot be reach by the drill rigs as they run the risk of collapsing into the tunnel. Instead, the final section will be drilled from the bottom up using long hole drill rigs.
FlexiROC T20 R is the second smallest member of the Atlas Copco family of drill rigs. It is also available with a short feed which is particularly well suited to drilling in narrow and cramped spaces. The rig has a hole range of 38–64 mm and features full remote control.

Read the full story here.

Epiroc operated under the trademark “Atlas Copco” prior to January 1, 2018.

Construction International Surface and Exploration Drilling division Customer story FlexiROC T20 R 2017

Related products

FlexiROC T15R freecut

FlexiROC T15 R

Surface drill rig for construction applications

FlexiROC T20R freecut

FlexiROC T20 R

Surface drill rig for construction applications and the dimension stone industry

COP RR11 rock drill

COP RR11

COP RR11 is a short and light rock drill for bolt hole drilling

All surface drill rigs

Uniting to deliver explosive power

March 22, 2022

FlexiROC T30 R Construction Edition 2022 International FlexiROC T15 R FlexiROC T35 Surface and Exploration Drilling division Customer story FlexiROC T30 R Quarry Edition

Erik Nubberud has his sights set on young, eager miners and rock excavators from his own home town. This has made the company take off even faster than he had ever hoped – with Epiroc as a reliable partner.

Continue reading

Munck Engineering building new airports in Greenland using machinery from Epiroc

November 27, 2020

FlexiROC T30 R Construction Edition 2020 Surface construction & quarrying International Northern Europe Surface and Exploration Drilling division SmartROC T40 Customer story

The Danish company, Munck Group, has taken on an icy mission where equipment will be running 24 hours per day, 365 days per year.

Continue reading

Muffled rig solves sensitive problem

December 18, 2018

FlexiROC T30 R Construction Edition FlexiROC T25 R Construction Edition Construction International Surface and Exploration Drilling division FlexiROC T30 R Quarry Edition 2018

At St. Göran's Hospital in Stockholm, a project requiring extensive blasting work is in progress. Moving rock close to a hospital filled with sensitive equipment, patients and staff, requires careful planning - and a drill rig with reduced noise l...

Continue reading

Visit our newsroom