Research on development height of Dayang Coal Mine water conducted zone and technology of water prevention and control
Coal mine water conducted zone development of coal mining work may bring adverse effects,taking the problem of water accu-mulation in Dayang Coal Mine as the object,through similar simulation experiment for simulation study,the results showed that the water conducted zone development height was 15.5 m.There was a risk of water conduction in two coal mining working areas,and the stress concentration problem in the water separated coal pillar during the coal mining process was more prominent,which may lead to the rup-ture and water seepage of the roof rock layer.Based on the experimental and numerical simulation results,combined with the empirical formula calculation,the water prevention and control measures were proposed:a reserved coal pillar with a width of 15 m was added be-tween the two mining working faces,and a permanent waterproof wall with a thickness of 2.3 m was built.Within 140 d of excavation and mining,the working face was promoted for a total of 320 m,and no water gushing harm problem occurred during the period,which proved that the construction operation meets the expected requirements and the water prevention and control measures have achieved significant results,and has certain application value.
water conducted zonesimulation experimentnumerical simulation modelwater prevention and control technology
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