FIELD: mining industry. SUBSTANCE: according to method, firstly dimensions are determined of mining sections in compliance with permissible shear stresses in depth of rock matter being excavated. Mining chambers are cut from hauling entry located in parallel to axis of supporting pillar. Mining section can be worked out by non-parallel chambers with formation of pillars which are trapezoidal in plan. EFFECT: high efficiency. 2 cl, 2 dwg
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|
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SU1763661A1 |
