Mechanism of rock fracture in gas bursts. [5 refs]

Journal Article · Thu Jan 01 04:00:00 EST 1976 · Sov. Min. Sci. (Engl. Transl.); (United States)

OSTI ID:7305698

Onopchuk, B N

Experiments show that the fracture of the rock in a gas burst is not instantaneous. Depending on the intensity of the burst, it may last for several seconds. The conditions of fracture of the rock influence the character of the fracture and the fallout of mixture into the worked-out area. Since bursts are the combined results of many factors, it is difficult to make a quantitative estimate of the influence of the conditions of breakage on the parameters of the burst process; it is mainly determined by the results of field observations on bursts. But if a burst is confined to a zone of broken coal containing gas at high pressure, the values of the main parameters characterizing the process can be obtained by numerical calculation. Practice in working coal seams reveals that most bursts occur with almost simultaneous fracture of the coal and ejection of a mixture of solid particles and gas into the worked-out area. The front of the expansion wave which feeds the ejection wave will be propagated through the inflowing current of mixture, with parameters corresponding to the parameters of the mixture behind the front of the wave of crushing.

• Research Organization: Inst. of Applied Mineralogy and Metallurgy, Donetsk, USSR
• OSTI ID: 7305698
• Journal Information: Sov. Min. Sci. (Engl. Transl.); (United States), Journal Name: Sov. Min. Sci. (Engl. Transl.); (United States) Vol. 12:2; ISSN SMNSA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
COAL DEPOSITS
COAL MINES
COAL MINING
FAILURES
FRACTURES
GEOLOGIC DEPOSITS
MINES
MINING
RESOURCES
ROCK BURSTS