综掘工作面粉尘运移规律及控制技术研究

Research on Dust Migration Law and Control Technology in Fully-mechanized Working Face

针对煤矿综掘工作面现有粉尘治理措施存在的不足,在长压短抽通风除尘方式中利用附壁风筒的旋流控尘作用将高浓度粉尘聚集在迎头,同时结合新型气水喷雾模块进行综合粉尘防治;以淮南煤矿区某综掘工作面为原型,根据井下实际情况,利用Gambit建立掘进巷道的几何模型,并利用Fluent软件对不同条件下掘进巷道通风过程中粉尘分布情况进行数值模拟计算与分析,确定了综掘工作面高浓度粉尘分布和运移规律;综合以上情况,采用长压短轴通风方式下新型气水喷雾模块附壁风筒配合自激式水浴水膜除尘器治理综掘工作面粉尘,现场检测显示,在回风侧全尘及呼吸性粉尘除尘效率均达到了89%以上。

For the purpose of making up for the deficiency of the existing dust removal methods in coal mine fully-mechanized working face, this paper proposes a more effective method using the swirl effect of the ventilator attached to the wall in the way of far-pressing-near-absorption ventilation to gather high concen- tration dust to head-on and combining with gas water spray to prevent and control dust. The paper takes a fully-mechanized working face in Huainan mine area as the prototype. According to the actual conditions under the mine, the paper applies the Gambit software to establishing roadway geometry and Fluent soft- ware to getting the results of dust distribution with different ventilation methods,and then contrasts the simulation results with the experiment results to get the high dust concentration zones. Based on the above results, the paper proposes a method of applying self-excited wet dust scrubber,wall attaching chimney and original gas water spray to prevent dust. The measurement data from the site shows that dust removal rate of full dust and respiratory dust reaches 89 %.