为掌握大采高工作面截割可吸入煤尘的产尘特征，并改进工作面降尘措施，以山西临汾某矿6 m大采高工作面为例，分别在采煤机前后滚筒附近布置煤尘监测点，采用SidePak AM520i 型个体暴露粉尘仪测量顺风情况下和逆风情况下大采高工作面PM10,PM5,PM2.5的粉尘质量浓度，同时采用JZYW—200B界面张力仪和JY-PHb接触角测定仪分别对不同浓度的矿用尘克(C&C)系列除尘剂进行了表面张力测试和湿润性测试，选取了合理浓度的除尘剂作为工作面降尘用水，降低了大采高工作面截割可吸入煤尘的浓度。研究结果表明：采煤机上风侧滚筒处PM10粉尘质量浓度平均为561～577 mg/m3，PM5粉尘质量浓度平均为489～495 mg/m3，PM2.5粉尘质量浓度平均为231～242 mg/m3，下风侧滚筒处PM10粉尘质量浓度平均为609～614 mg/m3，PM5粉尘质量浓度平均为508～522 mg/m3，PM2.5粉尘质量浓度平均为245～256 mg/m3；无论顺风还是逆风，下风侧滚筒处的PM10,PM5粉尘质量浓度波动范围较大，而PM2.5粉尘质量浓度波动范围较小，下风侧滚筒处的PM10,PM5,PM2.5粉尘质量浓度大于上风侧滚筒处的；顺风时上风侧滚筒处的PM10,PM5,PM2.5粉尘质量浓度低于逆风时的，逆风时下风侧滚筒处的PM10,PM5,PM2.5粉尘质量浓度大于顺风时的；浓度为0.1%时矿用尘克(C&C)系列除尘剂溶液表面张力为33.2 mN/m，接触角为34.27°，相比矿井水，其表面张力降低了43.82%，接触角减小了53.86%，具有良好的湿润性，在工作面进风巷安装表面活性剂添加装置，将其作为工作面降尘用水，工作面截割煤尘可吸入煤尘的降尘效率可达48.37%～53.91%，呼吸性粉尘的降尘效率可达39.57%～45.11%。

In order to grasp the dust production characteristics of inhalable coal dust generated from the cutting process of the high coal mining face and improve the dust reduction measures for the mining face, the 6 m large mining height working face of a mine in Linfen, Shanxi was taken as an example, by arranging coal dust monitoring points near the front and rear drums of the shearer respectively. At the dust monitoring point, SidePak AM520i type personal exposure dust meter was used to measure the dust mass concentration of PM10, PM5, PM2.5 in the large mining height working face under downwind and headwind conditions. At the same time, JZYW-200B interfacial tensiometer and JY-PHb contact angle tester were used to test the surface tension and wettability of different concentrations of mine dust gram (C&C) series dust collectors respectively. The use of water for surface dust reduction reduced the concentration of inhalable coal dust in the cutting of large mining heights. The results show that that the average PM10 dust mass concentration at the upwind side drum of the shearer is 561-577 mg/m3, the average PM5 dust concentration is 489-495 mg/m3, the average PM2.5 dust concentration is 231-242 mg/m3; around the drum on the leeward side of the shearer, the average PM10 dust concentration is 609-614 mg/m3，the average PM5 dust concentration is 508-522 mg/m3，the average PM2.5 dust concentration is 245-256 mg/m3. Whether the tailwind or headwind condition, the fluctuation range of the PM10, PM5 dust concentration around the drum on the leeward side of the shearer has a larger fluctuation range, while the PM2.5 dust concentration fluctuation range has a smaller fluctuation range, and the PM10, PM5, PM2.5 dust concentration is greater than that at the upstream side drum. Under the tailwind condition the dust concentration of PM10, PM5, and PM2.5 around the drum on the windward side of the shearer is lower than that of the headwind condition, and under the headwind condition the dust concentration of PM10, PM5, and PM2.5 around the drum on the leeward side of the shearer is greater than that of the tailwind condition. When the concentration of the dust removal agent of C&C series is 0.1%, the surface tension of C&C series dust collector solution is 33.2 mN/m, and the contact angle is 34.27°. Compared with mine water, its surface tension is reduced by 43.82%, and the contact angle is reduced by 53.86%, so it has good wettability. A surfactant adding device is installed in the air inlet of the working face along the groove, and it is used as the water for dust reduction on the working face. The dust removal efficiency of dust can reach 39.57%-45.11%.