Mineral Loss

Mineral Loss


the part of potential reserves of solid useful minerals that is not extracted from the interior of the earth when a deposit is worked. Losses are subdivided into general mine losses (pits, shaft, and placer) and operating losses. General mine losses include losses in bottom pillars, near major mine excavations and wells, in barrier pillars between mines, and under buildings, engineering and farming structures, communication lines, bodies of water, aquifers, and prohibited zones. Operating losses are subdivided into losses in the main body and those in mineral bodies removed from the main body. Operating losses of the first type include reserves left in pillars within excavated sectors; in flat and hanging walls; at tapering-out points and on flanks; in burning, flooded, and caved-in sectors; and near tectonic displacements. Operating losses of the second type are incurred during combined extraction and mixing with the enclosing rock; in slides, cave-ins, and flooding; at loading, unloading, storage, and sorting points; and on the transport routes of mining enterprises.

Mineral losses are computed in units of weight and in terms of percentage. General mine losses are given in relation to total balance reserves of the mine (pit or placer), whereas operating losses are given in relation to depleted balance reserves. All industrially important mineral components in composite ores are taken into account. Losses are determined by on-site measurements or by mine surveyor maps and cross sections with reliable delineation and sampling of the mineral deposits or stripping sectors. Indirect methods are used when direct methods are not possible and include comparing the amount of mineral product in depleted balance reserves to extracted bulk ore.

In the USSR, records of mineral losses must be kept by all mining enterprises.


Sbornik rukowdiashchikh materialov po okhrane nedr. Moscow, 1973.


References in periodicals archive ?
They tend to eat less meat than men and menstruation also plays an important role in mineral loss," he added.
Under the company's two clinical trials, the ECD system detected the earliest forms of mineral loss in enamel well before an actual cavity was formed.
More evident depressions or holes are observed in bleached specimenswhich indicates a higher mineral loss.
4,5 The activation of RANK-mediated NF-B pathway causes osseous mineral loss and extra-osseous, such as vascular, mineral deposition.
We excluded men, patients with a history of kidney stones, bone disease or renal chronic insufficiency, patients undergoing treatment with vitamin D, calcium, antiresorptive drugs, corticosteroids, thiazides, indapamide, potassium citrate or other drugs that induce lithogenesis or bone mineral loss.
On the 10th and 14th days of each phase, two slabs were collected and evaluated for mineral loss by SH.
4,7-14) Some researchers hold that Cd ions might themselves engage in osteoid formation (15) or act directly on bone and thereby aggravate the postmenopausal loss of bone minerals, although the underlying mechanism remains unclear; (2,13,16,17) however, evidence of bone mineral loss in terms of increased osteoclast numbers have not yet been obtained.
running, weight lifting), which help strengthen the bones in vulnerable areas like the hips and spine, and slow mineral loss.
mutans growth, to measure effects on plaque pH (resting and sucrose-challenged), to analyze lactic acid production after a sucrose challenge and to determine if C16G2 could help prevent bacteria-induced mineral loss.
The regular and frequent use of medicine coming into direct contact with teeth has been identified as an aetiological factor of mineral loss [Costa et al.
However, there is some science linking low-acid diets with bone health, because high-animal protein diets--essentially high-acid diets--appear to boost mineral loss from bones.