Gas regime

To the dangerous on the gas relate the mines, in which at least one time and on one layer was discovered the presence of methane. Depending on abundance of gas the mines are divided on 4 categories (table).

G. r. provides for the fulfillment of or-ganizaqionno- tech. measures for warning the accumulation of gas to the dangerous limits and the appearances of sources of the ignition of gas. This is reached by the realization of the intensive ventilation of workings and degassing mineral and enclosing rocks; by the application of such mode of operations and mechanisms, with which the accumulation of gas is minimal; by the regular by the monitoring of the content of gas in air of mine workings with the aid of the gas detectors and the equipment of automatic check and emergency notification. The second group of measures lies in the fact that not to allow in the mine of the open flame, incandescent objects and sparks (it is achieved by application it will protect, explosives, electrical equipment in the special performance, by the observance of precautionary measures with conducting of mining operations, etc.).

With the development it is stratified, dangerous on the sudden ejections and the fumarole isolations, when the layer accumulations of methane g. r. are present, is included the series it will supplement, measures. See also dust regime.

S. 4. Heifitz.