Numerical simulation of distribution regularities of dust concentration during the ventilation process of coal roadway driving;

Numerical simulation of distribution regularities of dust concentration during the ventilation process of coal drift driving with exhaust ventilation;

New method to determine dust concentration in coal mining face;

Using magnetized water to reduce shotcrete dust density and the rate of rebound;

The Study and Application of Transmission-model Optical Monitoring Technology of Dust Density;

Through analyzing and exploring a large number of tests and literature data, this paper sums up several impacting factors of dust explosion development in closed container including mainly dust density, initial pressure, oxygen content, container shape, turbulent, etc.

This principle and device can be popularized in other particulate density analysis for gas-.

In addition this paper made an exposition of prevent wear of probe by measuring its temperature? coal concentration? wind specd measured? model cutting circuity and statistics input coal to boiler.

Considering frictional pressure loss and suspending particles lifting pressure loss in the process of mixture between coal and air,based on gas solid two phases theory,a new method was developed to punctually measure coal powder concentration of air coal mixture by energy balance principle.

Considering frictional pressure loss and suspending particles lifting pressure loss in the process of mixture between coal and air, and based on gas-solid two phases theory, a method was developed to punctually measure coal powder concentration of primary air of vertical and horizontal duct in the four corner rounding boiler by energy balance principle.

Based on the theoretical relationship between gas-solid flow s centrifugal force change on outside and inside of bend and gas -solid flowing rate, we have made experimental research about measuring coal powder concentration in pneumatic pipes of boiler s combustion system with bend mehod.