Diffuse pollution characteristics of respirable dust in fully-mechanized mining face under various velocities based on CFD investigation

An experimental study on the effect of ionic liquids on the structure and wetting characteristics of coal

Comparison on the explosivity of coal dust and of its explosion solid residues to assess the severity of re-explosion

Numerical simulation investigation on optimal dust-exhausting airflow volume in fully mechanized caving face of high-gas coal mine

In 2012, the International Agency for Research on Cancer (IARC) classified diesel particulate matter (DPM) as a carcinogen to human. With the increased usage of diesel equipment in underground mines, miners have a high risk of over-exposure to DPM, which has drawn many concerns from the public. This study used computational fluid dynamics (CFD) to analyse the DPM dispersion and concentration distribution characteristics in an underground development face based on an onsite experiment. The DPM emitted from a moving loader under a forcing auxiliary ventilation system was simulated. The motion of the load-haul-dump (LHD) in the tunnel was represented by a dynamic mesh method. The species transport approach was applied to study the DPM behaviours. High DPM concentration zones were then identified based on the simulation results. The results could provide guidelines for work practices and be helpful to an optimum auxiliary ventilation design to reduce underground miner exposure.

Numerical study on DPM dispersion and distribution in an underground development face based on dynamic mesh

In underground coal mines, uncontrolled accumulation of methane and fine coal dust often leads to serious incidents such as explosion Therefore, methane and dust dispersion in underground mines is closely monitored and strictly regulated Accordingly, significant efforts have been devoted to study methane and dust dispersion in underground mines In this study, methane emission and dust concentration are numerically investigated using a computational fluid dynamics (CFD) approach Various possible scenarios of underground mine configurations are evaluated The results indicate that the presence of continuous miner adversely affects the air flow and leads to increased methane and dust concentrations Nevertheless, it is found that such negative effect can be minimized or even neutralized by operating the scrubber fan in suction mode In addition, it was found that the combination of scrubber fan in suction mode and brattice results in the best performance in terms of methane and dust removal from the mining face

Lu Yueze

Papers

Prediction of air flow, methane, and coal dust dispersion in a room and pillar mining face