POSTSEISMIC EFFECTS OF MASS EXPLOSIONS RECORDED DURING THE DEVELOPMENT OF KMA IRON ORE DEPOSITS

To evaluate the geodynamic and geoecological safety of field development, studies related to the assessment 
of the impact of mass explosions on the filtration properties of a water-saturated reservoir are of particular 
importance. Use of high-precision sensors installed in observation wells promotes the transition to a new 
level of scientific and methodological support of mining operations and provides monitoring of the 
technogenically disturbed groundwater regime. Since July 2019, within Korobkovsky and Lebedisky iron 
ore deposits of the Kursk Magnetic Anomaly (city of Gubkin, Belgorod Region) have been made a precise 
observations of the reaction of the «reservoir-well» system under explosion impact. Along with coseismic 
hydrogeological responses to the passage of seismic waves from mass explosions carried out in a mine and 
a quarry, decrease of level of supra-ore aquifer are traced. Marked effect are determined a formation and 
filling of zones of technogenic fracturing, renovation of existing cracks. The results of repeated pumping 
and geophysical well logs, carried out in October, 2021, indicate an ambiguous change in the filtration 
properties of water-saturated reservoirs under the influence of mass explosions. The obtained experimental 
data can be used to develop a methodology for predictive assessment of the postseismic effects, which will 
minimize the risks of possible accidents during the exploitation of hard mineral deposits with explosive 
technologies.