METHOD OF MEDIUM AND LOW DEPTH STEEP COAL-BED DEVELOPMENT Russian patent published in 2008 - IPC E21C41/00 E21C27/00 

FIELD: mining.

SUBSTANCE: invention concerns mining, particularly the methods of developing bedded mineral deposits sloping at 40-50 degrees to the horizon. The method of medium and low depth steep coal-bed development involves preparation of extraction pillar by drifting belt entry and airway along the bed course, installation chamber with creation of face line slanted against the bed course line at an angle approximately equal to, but not less than the seam dip angle, and mounting of powered support sections in the installation chamber tilted against the face line and bed course, i.e. along the line of dip, coal extraction by a cutter-loader suspended at trolley and safety ropes, maintaining of working face roof by mobile powered support sections shifted following the working face line to the face and to the belt entry direction, and rock pressure control over complete roof collapse. After a powered support section reaching the belt entry it is lifted to the surface and undergoes technical inspection and maintenance works, then it is assembled again in the working face, this time at the junction with airway.

EFFECT: improved efficiency and reliability of development of bedded mineral deposits sloping.

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