In order to reveal the distribution and migration law of downwind and upwind coal cutting, total dust (TD) and respirable dust (RD) concentration distribution and migration on the leeward side of the rear drum in the fully mechanized coal mining faces was tested by innovatively adopting the method of synchronous measurement at multiple measuring points on-site. Seven measuring points were arranged specifically in this area. The CCZ20 dust sampler was used for dust concentration sampling, and the filter weighing method was adopted to test the dust. Based on the statistical analysis of a large number of data, it is concluded for the first time that downwind coal cutting or upwind coal cutting has an insignificant influence on TD production, yet it exerts an obvious effect on RD production. According to the test results, the dust distribution in downwind coal cutting is divided into three areas, while that in upwind coal cutting is divided into four areas. Targeted dust suppression strategies for different areas were proposed based on the above law. Moreover, a dust suppression scheme consisting of high-pressure spray on the shearer and support spray based on auto-tracking of the shearer were designed and applied in accordance with the actual field conditions.

为揭示顺风、逆风采煤分布及运移规律，创新性地测试了综采工作面后滚筒背风侧总粉尘（TD）和可吸入粉尘（RD）浓度分布及运移规律。采用现场多测点同步测量的方法。该区域专门布置了七个测点。采用CCZ20粉尘采样器进行粉尘浓度采样，采用过滤器称重法进行粉尘检测。通过对大量数据的统计分析，首次得出顺风采煤或逆风采煤对TD产量影响不显着，而对RD产量影响明显。根据测试结果，顺风采煤粉尘分布分为三个区域，逆风采煤粉尘分布分为四个区域。根据上述规律提出了针对不同区域的针对性抑尘策略。此外，根据现场实际情况，设计并应用了采煤机高压喷淋和采煤机自动跟踪支撑喷淋抑尘方案。