DOWNHOLE METHOD OF DETERMINING ZONES OF ROCK DAMAGE Russian patent published in 2016 - IPC E21C39/00 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for evaluation of stress-strain state of mine rock massif, detection of location zones of rock damage and nature of their propagation to ensure stability of exposures of mine workings and working excavation in underground mining of mineral deposits. Downhole method for determining damaged rock zones involves drilling of wells and bore pits in underground mine workings with diameter of ⌀40÷100 mm and more, with length of 5÷10 m and more. On well walls layer of lime, water-emulsion paint or gypsum is applied. Using photo and video recording equipment negative image of well is produced, from which structural broken condition of investigated mass is determined, distribution of zones of rock damage, and processes of displacement and deformation of mine rock mass.

EFFECT: technical result consists in improvement of efficiency and safety of mining operations at development of solid mineral deposits by evaluation of structurally disturbed and seam liable to rock masses, prediction of development of deformation processes.

1 cl, 3 dwg