计算结果表明，在最大偏心距相同情况下，直线布置、梯形布置和三角形布置的极限承载力相同；
The results show that the ultimate capacities are equal under the same maximum eccentricity when the shape of the wires layout is linear, trapezoid or triangular.
在煤层三角形区域内布置回采工作面，利用工程数学，优化工作面设计，最大限度地回采煤炭。
Assign face scope at triangle coal seams, make use of engineering mathematics, optimize face designs to mine coals to the maximum.
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