n.采煤工作面；(正在开采的)煤层截面
The structure is compact ,and the water pump covers small area.It accord with the need of the coalface. 该喷雾泵结构紧凑，占地面积小，符合采煤工作面的要求。
The gas transport process in tunnel and the cause of gas accumulation at the upper corner of coalface are described. 论述了煤层巷道及工作面上隅角瓦斯运移过程及其局部区域和上隅角形成瓦斯积聚的原因;
Aimed at the shortcomings of coalface passing through fault as low speed, low efficiency and low-quality coal and so on, a new technique was suggested. 摘要针对采煤工作面过断层速度慢、效率低且影响煤质等缺点，提出工作面快速无矸石过断层清洁开采技术。
Therefore, the location of terminal line of the coalface should be put at the place where main roof periodic weighting process has already done. 因此，工作面终采线的位置，应尽可能确定在老顶岩层周期来压完成之后。
These conclusions are confirmed by 1203 coalface in which water inrush occur but sand inrush not occur when mining in Shen-Fu mining area in shaanxi. 大柳塔1203工作面开采只发生了涌水而未溃沙，这和理论计算的结论基本一致。
