To investigate dust absorption performance of the dust hood in an airtight cover in different dust absorption modes

the Simple algorithm was applied to conduct numerical simulation on distribution of coal dust concentration in the airtight cover at transshipment points of the coal conveyor belt.When the single exhaust hood forward or lateral dust absorption mode was adopted

the coal dust accumulated in chute turning points and outlet area of airtight cover with different dust absorption positions.Compared with the forward dust absorption mode

the lateral dust absorption mode used at the chute turning point can obtain better dust removal effect.At the same time

the coal dust concentration in bottom layer airtight cover was relatively low.When the combined dust absorption scheme(one dust hood was located at each end of the airtight cover

among which the one at the chute turning point adopted lateral dust absorption mode

and that at the outlet of the airtight cover adopted the forward dust absorption mode and the lateral dust absorption mode

respectively)was employed

the coal dust accumulation in above areas was alleviated

and the dust removal effect in the airtight was significantly enhanced.