FIELD: mining.
SUBSTANCE: method consists in forming unloading crack entry in wall of borehole along its vertical axis. The crack entry is formed in intervals of salt prone to fluidity to depth from the contour of the borehole determined by radius of the critical region wherein difference between main stresses exceeds yield point of salt. Control over changing stresses is performed on base of tensile parameters of rock determined by means of acoustic method of geophysical investigation.
EFFECT: high efficiency of boring and casing of deep boreholes under conditions of plastic flow of saliferous rock.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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SU1749869A1 |
