Abstract
The process flow chart of hydraulic impact on coal and rock mass is examined. The double-sided packer design is presented for the implementation of the chart in uncased wells of large and varied diameters. The laboratory tests of axial displacement of packer seals are described. The DEM-based stress–strain analysis is performed in rock mass in the vicinity of a well subjected to pressure from packer seal. The pressures at the packer seal–well wall interface are calculated.
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