Construction of 4 road tunnels in NATM soil / rock in the mountain section in the duplication of BR116 São Paulo - Curitiba.
100 km to the work for visit and presentation of this construction in the national context, its importance in engineering and environmental contribution.
Estimated total visit time in 7 to 8 hours
The Baltar Mine, underground mining of limestone for cement production, started its operations in 1981, being suspended in 2001 and restarted again in 2008. The mining method is sub-level stoping, by means of 2 mining panels separated by a 40-m thick crown pillar, with opening of rooms alternated with pillars, with the rooms having 3 mining sublevels measuring 40-m wide and 110-m high and variable length according to the thickness of the mineral body; For each room, approximately 2.300 m of tunnels are developed with main dimensions of 3,80 x 3,80 m. The ore is mined by slot opening, fan drilling and blasting with explosives. The main access is made by a 1850-m long descending tunnel measuring 7,50 x 5,0 m, 12,4% slope and 210 m depth in relation to the surface.
Visit schedule:
9 am - 10 am
Welcome reception/Integration/PPE handout
10 am - 11 am
Going in/out of the mine with 3 vehicles - 12 persons
11 am - 12 pm
Going in/out of the mine with 3 vehicles - 12 persons
12 pm - 1 pm
Lunch - Main canteen