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Shock wave is the main reason for the formation of dust pollution at the high-drop transferring point. The transferring point of Hei Daigou coal preparation plant is taken as an example, By using the calculation theory of air shock wave, the technical parameters in dusting system of transferring points are determined. The result shows that, when the distance between dust catcher and the intersection...
Aiming at key problems existing in wet dust collector, a new type of wet dust collector was successfully developed which integrated various wet dust removal mechanisms. And the relationship between total collection efficiency and factors such as water discharge level, inlet velocity, pressure loss of the dust collector have been experimentally researched. The results show that: (1) Using unique double...
The ventilation system is the basis to control the hazards in coal mine laneway. High reliability ventilation system can continuously convey fresh air into laneway , dilute the noxious gas, reduce disaster and ensure the mining productivity safe and effective. As we know that, many noxious gases in the coal mine laneway are compossible and their flowing states are complicated. In order to acquire...
A numeric simulation of gas migration in a fully mechanized coal caving stope based on Lattice Boltzmann Method is put forward. A mining stope includes an inlet air tunnel, a return air tunnel, a working face and a goaf. There are two different states of air movement in a stope: turbulent flow in the inlet air tunnel, the return air tunnel, the working face (the three parts are simplified as working...
Gas migrating in goaf and congregating in upper corner result in gas over limit in upper corner which greatly influences coal mining safety. To explore the cause of upper corner gas over limit and control it, this paper provides Lattice Boltzmann Method (LBM) simulation of gas migration and control in goaf of fully mechanized coal caving mining face. After analyzing the characteristics of goaf, a...
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