METHOD FOR DETERMINING DEFORMATIONAL INTERRUPTIONS OF MOUNTAIN MASSIVE ABOVE EXTRACTED SPACE Russian patent published in 2004 - IPC

FIELD: mining industry.

SUBSTANCE: method includes drilling in zone of supposed maximum deformation of rocks of horizontal well with concurrent mounting of benchmarks of magnetic-active material, and casing of well with flexible pipes of non-magnetic-active material. Measurements of distances between benchmarks are performed and curves of horizontal massive horizontal deformations are built, flexure of casing pipes is measured, on basis of value of which values of maximum horizontal deformations of rocks layers are determined. Values of deformations are compared, which values are received instrumentally and mathematically, and average value of maximum horizontal deformations of layers of rocks is calculated as well as size of crack. Location of cracks is determined, stability is estimated as well as water permeability of rocks above extracted space and height of zone of through crack is determined, and extraction parameters are corrected.

EFFECT: higher speed of gathering of information concerning change of geomechanical state of mountain massive above extracted space.

5 dwg