Understanding of mine water inrush prevention disaster.
Date:2013-11-29 Hits:
Flood is one of the great scourges, causing serious loss of coal mine disasters in coal mine flooding accident disaster, many times caused significant casualties, coal mine flooding accident prevention is an important work in the coal mine safety production.
In the process of coal mine construction and production, surface water and groundwater through various channels, such as crack, fault subsidence area into the mine, as mine inflow than normal drainage ability, causes the mine disaster, also known as water. Master warning control coal mine flooding accident in coal mine flooding caused losses.
1, general omen:
(1) becomes wet, soft coal seam; help dripping, pouring water, and water from small to large; sometimes coal appear rust water mark.
(2) surface temperature decrease, or fog or hydrogen sulfide odor (i.e., rotten egg smell).
(3) can sometimes smell the water "hissing" sound.
2, the bottom aquifer of limestone water inrush:
(1) working face pressure, bottom strands, the bottom stock volume and sometimes can reach more than 500mm.
(2) working face floor cracks, and gradually.
(3) along the fissures or coal to help out water seepage, with the cracks increased, content increases, when the floor seepage quantity increases to a certain extent, coal permeability may stop, the color is clear water turbidity turbidity, bottom plate, bottom stability when the water clear.
(4) floor rupture, along the crack with a high pressure water jet, and accompanied by "hissing" sound or harsh underwater.
(5) floor of "bottom exploding", accompanied by loud noise, water flooding, water color is white or yellow.
3, loose pore aquifers water inrush:
(1) water bursting site, dripping, dripping phenomenon get damp and gradually increased, carefully observed water containing a small amount of fine sand.
(2) the occurrence of local roof fall, water surge and the emergence of quicksand, quicksand is intermittent, color when the clear when the turbidity, the general trend is water, sediment increases, until the sand poured out.
(3) the roof collapse water, sand inrush, this phenomenon may affect the surface, the surface collapse pit.
Since the coal mine flooding accident has sign, so the coal mine flooding an understanding can avoid flooding accident disaster, take measures to effectively find permeable omen, the flooding accident nipped in the bud.
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