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EXPERIMENTAL MINE OPERATION MANAGER (EXPERIMENTAL PROOF GROUND) (KD5)

MINE RESCUE STATION

OFFER OF THE EXPERIMENTAL PROOF GROUND:

We offer to use the underground proof ground of the Experimental Mine "Brabara" in order to conduct scientific-research activities comprising:

  • investigations into the course of coal dust and methane explosions in experimental gates 400 m and 200 m
  • investigations into the course of other organic dusts explosions, including corn dusts
  • strength tests of explosion-proof dams of different thickness and construction in the experimental gate 200 m at the testing stand with cross-section 11 m2 and length 10 m
  • testing of explosion-proof barriers of various types - dust, water, trigger barriers with the use of detectors
  • show coal dust explosions in experimental gallery 100 m along with training in the field of dust hazard control

CHARACTERISTIC OF THE EXPERIMENTAL PROOF GROUND:

The underground workings of the Experimental Mine "Barbara" of the Central Mining Institute have been localised at the levels 30 and 46 m. Their total length amounts to 5 km, the cross-section from 4 m2 to 10 m2. The experimental gates were driven using concrete support and they have been equipped with a system of explosion measurements along with recording and teletransmission of data.

  • The underground workings comprise:
    • gate of 400 m length and cross-cut 7.5 m2, with outlet to the surface from the level 46 m
    • gate of 200 m length, cross-section 11 m2, with 10-meter section of cross-section 11 m2
    • connecting gate: length 140 m, cross-section 4 m2
    • low gate at the level 30 m, length 180 m, cross-section 7.5 m2 (height 1.5 m, width 5 m)
    • chamber working with dimensions 6x80 m
  • Coal seam 310, non-gassy, classified among the group of medium susceptibility to spontaneous ignition, not hazardous with respect to rockbursts
  • Shafts: main and ventilation shaft; possibility of transportation of loads with length up to 6 m
  • Hoisting installations - only in the main shaft
  • Fans:
    • main fan of 2250 m3/min capacity and accumulation equal to 700 Pa
    • auxiliary fan of 3500 m3/min capacity and accumulation equal to 1000 Pa
  • Energy supply:
    • surface - 12-field switching station with average voltage 20/0.5 kV and 20/0.4 kV
    • underground - 500/127 kV, maximum supply power 250 kV
  • Underground communication from the level 46 m to the dispatcher point
  • Compressed air network of m3/min capacity

At all testing stands exists the possibility to carry out measurements of explosion proof parameters on the basis of the data control and acquisition system of Hewlett-Packard firm.

The standard measuring possibilities comprise the measurements of the following parameters:

  • total static and dynamic gas pressure
  • gas temperature
  • localisation of explosion flame front
  • stresses in constructional elements

There exists the possibility to adapt the measuring system for the needs of a definite tests and extending in this way the set of measured parameters.

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