METHOD TO DEVELOP STRONG SLOPING POTASSIUM BED WITH LAYER OF MINE SALT Russian patent published in 2012 - IPC E21C41/20 

FIELD: mining.

SUBSTANCE: method includes combine mining of a bed with chambers by serial cuts in layers, transportation of a mineral by a vehicle. Bed mining in a chamber is carried out with a combine with a drum or an overcenter actuator. At the same time at first a part of a lower layer of a mineral bed along contact with a layer of a mine salt for the entire width and length of a chamber, a layer is cut with removal of broken mine salt from a processed chamber. Then at first the upper part of a bed is cut and discharged, and serially the lower layer is worked. Besides, the capacity of the first processed layer should comply with the following condition: h_min≤H_l1≤h_max-H_ms-H_ul, where h_min and h_max - accordingly, the least and highest height of a mine driven with a combine; H_l1 - capacity of the first mined layer; H_ms - capacity of a mine salt layer; H_ul - capacity of an upper potassium layer. Mining is carried out with several stages of a combine with their subsequent expansion until the designed width. Chambers are aligned along axes of the folds, and their processing is started at the highest side.

EFFECT: increased efficiency of a selective method for development of high-capacity slope beds with a layer of mine salt, in which the lower layer is considerably stronger than upper layers due to expansion of applied equipment assortment.

3 cl, 5 dwg