为了增加煤炭生产,以满足日益增长的煤炭需求量,促使煤炭工业部门广泛地采用长壁采煤法.长壁采煤法虽有许多优点,但在呼吸性粉尘控制方面,要使其达到联邦规程规定的2毫克/米~2的标准还相当困难.采用双滚筒采煤机时问题就更加严重.如果不研究出有效的解决方法并付诸实施,这种有希望的、产量高的采煤方法就不能充分发挥其作用. In order to increase the coal production to meet the increasing demand for coal, the coal industry sector is urged to adopt the longwall mining method widely. Although the longwall coal mining method has many advantages, it must be brought to the federal level for respiratory dust control The regulations of 2 mg / m ~ 2 are still quite difficult, and the problems are even more acute with twin drum shearers.If no effective solution has been developed and put into practice, this promising, high-productivity Coal method can not give full play to its role.