Abstract
According to potential safety hazards of unreasonable ventilation and overrun dust concentration caused by the high degree of mechanization and the quick tunneling speed in the “long-distance & full-section†working face used in Daliuta coal mine of Shenhua coal group corporation limited, this paper studied the FPNA (far pressing near absorption ventilation) ventilation dedusting technology to solve the problems. This technology includes measures of simulation analysis on dust distribution, reasonable selection of the dust removal fan, adopting dynamic hanging technology to extending blower to the front of tunneling working face, setting up dust preventing board in front of tunneling machine and dust suppression by spraying. Field practice shows that the average dust concentration of working face is reduced by more than 50%, and achieved good results. The improved ventilation dedusting technology has been promoted and applied in Shenhua coal group corporation limited.
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