METHOD FOR DETERMINING INTERNAL SYSTEM OF CRACKS OF ROCK MASS Russian patent published in 2018 - IPC E21C39/00 F42D1/02 F42D3/04 

FIELD: mining.

SUBSTANCE: invention relates to mining industry. Project production of drilling and blasting operations. Drill wells in the rock mass. Measure the coordinates of the wellheads, their depth and slope. Install measuring cables in three or more wells to determine the detonation velocity of the explosive along the length of the charge. Install intermediate detonators. Charge a drill-hole with an explosive. Mount surface explosive network. Connect the measuring cables to the recording device. Firing is performed. Characteristic of the system of cracks, which is not available for direct measurements, is located inside the rock massif, is determined from the areas of extremum of the velocity diagrams of the detonation of explosives in three or more wells. Location of the cracks is determined by the axis of the chart the length of the charge. Opening of cracks is determined by the axis of the chart time, after which the values obtained are interpreted in a 3D model of the distribution of cracks in the area of blasting operations. Location of the planes of cracks and the level of their openness is built, the angles of incidence of cracks is determined, along with the distance between the systems of cracks by measuring in a 3D model with the formation of a database of predicted data on the distribution of cracks in the surrounding rock mass.

EFFECT: invention allows to increase the information content of the evaluation results.

3 cl, 1 dwg