Research on the dust production characteristics and comprehensive dust-proof technology of the rapid excavation face in coal mine

In view of the characteristics of fast excavation speed, equipment concentration and large dust production in the rapid excavation face of coal mine, taking the rapid excavation working face of Caojiatan Coal Mine 122107 auxiliary roadway as the research object, the dust production characteristics in the rapid excavation face were analyzed in detail, and the comprehensive dust-proof technology and process parameters of "spray dust suppression + airborne ventilation dust removal" were carried out.Combined with the dust production characteristics of rapid excavation face and the shape characteristics of the anchoring all-in-one machine, four spraying devices close to cutting drum and an airborne dust removal device were designed, and the on-site industrial test was carried out.The results show that with the application of comprehensive dust-proof reduction technology in the rapid excavation face, the dust reduction more than 90.69%, which can greatly improve the dust pollution of the rapid excavation face.