DRILLING MACHINE VS SEAL-625 P1, P2

The drilling machine is determined for coal elicitation from coal-beds with the height of seam over 0,6m and for minerals with cutting resistance up to 350 kN/m.

The principle of this mining method consists in elicitation of coal-chambers with the width of 2005 - 2105mm, height of 625 - 825 mm according to the drilling head design.

The solidago between chambers is chosen with reference to geological conditions from 0,8 to 2 m.

The drill is performed from the drift, the chamber is not stiffened. It is the method of coal-mining without assistance of persons in the chamber (in the stope).

For the coal-mining of seams with hazard of coal-blowout or gas-blowout, the machine is equipped with efficient ventilation and above all with high-pressure sprinkling of the drilling crowns.

During operation the front of the drill is continuously monitored in the following parameters:

quantity of CH4 (max. 1,5%)
blast volume status (about 200 m3/hour)
flowing-through water volume in the sprinkling jets (about 30 l/min)

If the preset parameters are crossed over, the drilling machine is automatically stopped.

Advantages of the Machine and the Mining Method Compared to Traditional Technologies

coal-mining without assistance of people on the pillar unambiguously increases safety, especially in low seams;
fundamental reduction of work injuries;
thanks to efficient sprinkling and to the way of coal-staging through the use of the worms, the dust nuisance is minimalized;
choose of the drilling head suitable system practically excludes associate minerals ripping, the coal-yield is not ballasted with extraneous ash, by the selective mining the coal can be used without need of further refining in the process of treatment;
it enables economical elicitation of rest coal-pillars round geological stoppages without any need of drifts and channels tunneling;
ensuring of fundamental reduction of hard physical work and higher culture of miners´ work;
needed staff for the drilling machine operation is 4 - 5 persons.

More info [PDF; 5,1 MB]

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