Optimization for Substep Three-dimensional Dust Control System at Fully Mechanized Excavation Face

For the inadequacies of substep three-dimensional dust control system at fully mechanized excavation face, we optimize the structure of annular outer mist spray device and dust cover for heading machine, and select more convenient mode of process matching for dust control devices. All these ensure the original effect of dust control, and greatly improved the applicability and reliability of the system in harsh operating environment of coal mine.