| 摘要 |
FIELD: mining.SUBSTANCE: invention relates to mining industry, namely, to undermining of ore bodies with filling of the mined space with hardening mixes. The method to determine extent of undermining of hardening fill under mechanical damage of ore massif includes formation of a hole in the ore massif and fixation of a stiff rod in it for fixed depth, supply of hardening filling mix into the mined space, damage of the ore massif with a part of the contact layer of the hardening fill massif. When mining the ore massif, they damage the rod in the ore massif and in the contact layer of the hardening fill massif, and the extent of undermining of hardening fill is determined according to the difference in the following formula: ?=L-L-L, where ? - extent of undermining of the hardening fill massif; L - total length of blind cavity, arranged inside the rod; L- length of rod deepening in the hole of the ore massif; L- length of blind cavity that is left after damage of the ore massif.EFFECT: invention makes it possible to determine extent of undermining of hardening fill massif.3 dwg |
