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METHOD FOR MINING OF GENTLY SLOPING POTASH BEDS UNDER CONDITIONS OF LIMITED PERMISSIBLE SUBSIDENCE OF EARTH SURFACE

机译:地表有限许可下柔滑钾盐矿的开采方法

摘要

FIELD: mining industry; applicable in mining of gently sloping potash beds when mining in complicated conditions of occurrence of water-bearing horizons. SUBSTANCE: filling is carried out by alternating room blocks with high degree of filling and with low degree of filling, or without filling the rooms above which, after destruction of pillars, arches are formed of caved roof rocks. Pressure exerted on pillar located between arches in roof rocks is calculated to be less than, or equal to, limit of long-term strength of that pillar. EFFECT: higher efficiency. 1 dwg
机译:领域:采矿业;适用于在发生含水层的复杂条件下开采的缓倾斜钾肥床。实质:填充是通过交替进行具有高填充度和低填充度的房间块来进行的,或者不填充房间,在其上方破坏柱子后,由塌陷的屋顶岩石形成拱形的房间。计算得出,施加在位于屋顶岩石拱顶之间的支柱上的压力小于或等于该支柱的长期强度极限。效果:更高的效率。 1载重吨

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