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What is the omen of the coal and gas outburst accident? -- Yiguang Science and Technology
Release time:
2019-12-18
Author:
Source:
(1) Silent omen A coal seam structure changes, bedding disorder, coal seam from hard to soft, from thin to thick, inclination from small to large, coal from wet to dry, luster dim, coal seam roof and floor fracture, coal rock serious damage, etc. B working face coal body and support pressure increases, coal wall outer drum, slag, coal extrusion, etc. C gas increases or fluctuates, and coal dust increases. (2) Sound omen coal explosion sound, muffled thunder sound, deep rock or coal seam rupture sound, pillar fracture, etc.
(1) Silent omens
A coal seam structure changes, bedding disorder, coal seam from hard to soft, from thin to thick, dip angle from small to large, coal from wet to dry, luster dull, coal seam roof and floor fracture, coal rock serious damage, etc. B working face coal body and support pressure increases, coal wall outer drum, slag, coal extrusion, etc.
C gas increases or fluctuates, and coal dust increases.
(2) Sound omen coal explosion sound, muffled thunder sound, deep rock or coal seam rupture sound, pillar fracture, etc.
Key words:
Outburst, coal seam, enlargement, omen, change, coal dust, face, extrusion, fracture, break
