Aimed at the problem of serious dust pollution and poor control effect in the roadway of the fully mechanized mining face in Pingmei No.6 Coal Mine,numerical simulation method was used to study the air flow and dust transport law of Wu10-22220 fully mechanized mining face,and based on this,a spray field that can atomize and seal the main dust source points was constructed.The results show that when no dust reduction measures are taken,the dust concentration near the front of the excavation face reaches over 3000 mg/m3,and the dust concentration on both sides of the excavation machine and at the driver's position is higher.However,the dust suspension in the rear section of the tunnel cannot be discharged in a timely manner;According to the dust movement law obtained,based on the newly developed air-water spray device and water curtain,the cutting dust source and fugitive dust were spray to reduce dust,and the dust concentration was significantly reduced,and the dust reduction efficiency reached more than 85%.
关键词
综掘工作面/数值模拟/粉尘运移/粉尘防治
Key words
fully mechanized excavation face/numerical simulation/dust transport/dust prevention and governance
维普
万方数据