Luts І. Decrease in air dust content in the context of operating processes within manganese mine workings

The thesis has solved topical scientific problem to improve health conditions for miners working in dead entry ways and conveyor roadways within manganese mines. The problem has been solved through determination of rules of dust formation, expansion, and settling while performing basic technological operations used to develop means and techniques to reduce air dust content at work places. Effect of air flow dynamic characteristics on dust formation intensity in the process of coal shearer operation has been determined. Experimental investigations have made it possible to identify parameters of dust formation intensity depending upon a design of working organs of coal shearer applied and physical and mechanical properties of manganese ore. Dynamics of dust accumulation within horizontal mine workings and slope ones in term of ore conveying has been analyzed. Mathematical model demonstrating interaction between manganese ore particles and conveyor belt has been developed; the model involves forces of adhesion and self-adhesion if belt surface is covered with high-absorbency fine fractions. The investigations have helped develop a technique to prevent accumulation if manganese ore fine components at the surface of return belt with the use of antiadhesive tools making it possible to decrease amount of dust within sub-conveyor space. A facility to proof units of belt conveyor reloading has been designed. It helps improve efficiency of aspiration process efficiency and decrease air dust content within gate roads. Telescopic airway has been designed; in terms of dust factor it helps developing optimum ventilation modes in the process of coal shearer operation. A facility to centre conveyor belt has been designed; thus, belt remains on rollers and spillage is prevented within subconveyor space.