Integrated dustproof key technology in over 8 m large mining height fully-mechanized face

The mining height of ultra large height mining face was far beyond the effective distance of traditional spray dust, which would cause the problem of dust floatation and leakage. In order to solve the problem of comprehensive dustproof of ultra large mining height face, the paper studied the characteristics of dust producti on and migration patterns for ultra large mining height face, discussed the key technologies of integrated dustproof. On this basis, the paper optimized the parameters 0 f key components that affected the dust control effect and fially put forward the integrated dustproof key technology in over 8 m large height mining face.The applicatio n showed that the new method was effective in covering dust area and solved the problem of dust floatation and leakage which could ensure the production safety of wo rking face and avoided the harm of coal dust to workers' health. The result showed that the new method had good application promotion value. The new method had lai d the foundation of the comprehensive anti-dust technology theory system for more than 8 m large mining height face, which had some reference significance for relate d comprehensive dustproof technology.