Research On Complex Dust Technology In Fully Mechanized Work Face

At the end of 2013, the cumulative discovery of occupational disease cases reached 850000, which accounted for about 90 percent of lung disease pneumoconiosis, coal accounted for about 60 percent in lung disease pneumoconiosis, and coal dust situation is extremely serious occupational hazards. Heading face is the main source of dust production, seriously endangering the health of workers. In this paper, analyzing the distribution of tunneling face romantic on theoretical, analyzing the stress of dust particles, set up dust particles horizontal and vertical motion equation, the results show that the dust particles in the air resistance is affected by the rate of diffusion of the rapid decay, movement distance is very short, the proliferation range is very small, the main driver of the spread dust from the surrounding air flow, air flow can be controlled by changing the work face of the proliferation of dust.Using numerical simulation software to simulate the tunneling face dust transport under forced ventilation conditions, the results show the dust filled the entire roadway, dust effects was bad. In order to improve the rate of dust, dust blower tunnel was added to simulate the dust migration under long-short pumping pressure ventilation conditions, the results show fully mechanized excavation work in front of a large square of dust concentration, there is a significant reduction in dust blower behind the dust concentration, dust effect is good. Through simulation and pushed out of the roadway dust duct distribution duct in different positions, then determining the optimum position of the hairdryer.At long short pumping pressure ventilation conditions dust effect is good, but still cannot meet face in the dust concentration "Coal Mine Safety Regulations" requirements, so need to meet spray dust, chemical additives, dust and other measures. The use of experimental methods measured five kinds of surfactant wetting, use fast penetrating anion T as the main ingredient and the other four agents were complex, complex show rapid penetrant T complex and alkyl glycosides best wettability best, a comprehensive analysis of the wettability wetting agents, chemical toxicity and the economy to determine the final formula: 0.05% fast penetrant and 0.01% T APG complex water solution as a wetting agent, added 0.1% concentration of sodium and water retention agent as a synergist.Research deepen the different ways of ventilation airflow field, dust collection efficiency and the impact of migration understanding, optimizing duct layout parameters, humectants was formulated spray dust, it has positive implications for the rational development work face complex dust measures.