煤矿井下松软煤层空气雾化钻进用雾化器的研制  

Research and development on atomizer of air atomized drilling in soft seam of underground mine

作　　者：王力 

机构地区：[1]中国煤炭科工集团西安研究院有限公司,陕西西安710077

出　　处：《煤炭科学技术》2016年第8期150-155,共6页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2011ZX05041-002);中国煤炭科工集团西安研究院有限公司科技创新资助项目(2011XAYCX013)

摘　　要：针对井下空气钻进时孔口粉尘污染严重,实践中通过风水联动阀直接将水注入孔内抑尘,不能实现雾化水量、雾流参数的精确控制与调节,抑尘效果差,且易导致煤粉过湿,排粉困难而引发孔内事故等问题,通过计算、有限元分析以及配套选型等方法,计算确定了雾化流量、雾化压力以及喷嘴直径等雾化器关键参数,优选了气动马达、雾化泵等关键元件,设计了雾化混合腔,研制了煤矿井下松软煤层空气雾化钻进用雾化器,雾化器最高雾化压力达10 MPa,雾化流量4 L/min,雾化参数可控制和调节。现场应用表明:使用雾化器后现场粉尘浓度降低了94%以上,在保持较好的除尘效果时,雾化液量随着孔深的增加而增加,大致呈线性关系;孔深200 m左右时,最大雾化液量3.5 L/min,且钻进过程中未出现孔内高温现象,能满足煤矿井下松软煤层空气雾化钻进的需要。According to serious dust pollution at the mouth of the borehole during the air drilling operation,with the air and water linkage valve in the practices,water could be directly injected into the borehole to control the dust and the atomized water quantity and atomized flow parameters could not be accurately controlled and adjusted. Thus the dust control effect was poor. Due to the coal powder was too wet,the difficult dust discharging caused accident and other problem occurred in the borehole. With the calculation,finite element analysis and matching selection as well as other method,the atomized flow,atomized pressure,nuzzle diameter and other key parameters of the atomizer could be calculated and determined. The pneumatic motor,atomized pump and other key components were optimized and the atomized mixed chamber was designed. A sprayer special for the air atomized drilling in soft seam of the underground mine was researched and developed,the max atomized pressure of the sprayer could be 10 MPa,the atomized flow could be 4 L / min and the atomized parameters could be controlled and adjusted. The site application showed that after the application of the atomizer,the site dust concentration could be reduced over 94%.When the good dust control effect was kept,the atomized quantity would be increased with the depth of the borehole increased and would be in a linear relation roughly. When the depth of the borehole was at about 200 m,the max atomized quantity would be3.5 L / min and there was no high temperature occurred in the borehole during the borehole drilling. Thus the sprayer could meet the requirements of the air atomized drilling in the soft seam of the underground mine.

关 键 词：煤矿井下 空气雾化钻进 雾化器 煤粉 

分 类 号：TD41[矿业工程—矿山机电]