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Information × Registration Number 0205U000629, 0103U001273 , R & D reports Title The basiz of shiense geotechnologic of undermined to dredging coal layers popup.stage_title Head Bondarenko V. I., Registration Date 04-02-2005 Organization National Mining University popup.description2 The expediency of protection of mining workings by strips of variable rigidity from hardening materials is proved for drilling off of thin and rather thin coal seams and the new technique of a choice of rational parameters of fastening and protection of preparatory workings is developed. Product Description popup.authors popup.nrat_date 2020-04-02 Close