Approved by the Order of Committee on the state control of emergency situations and industrial safety of the Ministry on emergency situations of the Republic of Kazakhstan of August 20, 2008 No. 33
Introduction
Methodical instructions intend for management when conducting underground mining operations on the operated fire-dangerous ore fields, and also when designing mines on again reconnoitered ore fields provided by sulphidic ores and the containing breeds inclined to spontaneous ignition.
1. The miner fires in case of development of ore fields for the reasons of their origin are divided on:
1) endogenous, arising from spontaneous ignition of sulphidic ores and the containing breeds as a result of their oxidation;
2) exogenous, arising from ignition of combustible materials under the influence of any external sources of heat.
2. The endogenous fires on mines arise in the fulfilled space in case of systems with collapse, in cameras with zamagazinirovanny ore and also in the destroyed tselika and potolochina.
3. The oxidized components in sulphidic ores and the containing breeds are sulphidic minerals: pyrite, marcasite, melnikovitpirit, pyrrhotite, chalcopyrite, covellite, sphalerite and others.
4. Oxidation of sulphidic ores and breeds comes continuously due to absorption of oxygen from the miner atmosphere and is followed by allocation of certain amount of heat. Processes of oxidation of ore and breed in case of their humidity are especially intensive of 1 - 4%.
5. The oxidizing processes reaching stage of the endogenous fires develop in the course of conducting clearing works and do not depend on whether they are conducted by systems with bookmark or with preventive silting, that is can arise in case of any system of the development allowing temporary magazinirovaniye of ore in clearing face.
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