bent entry
... 弯曲巷道：winding roadway 弯曲平巷：bent entry 弯曲矩：moment of flexure ...
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分析了平巷煤壁中预存裂纹尖端产生翼型张裂纹，形成薄煤层壳，薄煤层壳弯曲变形失稳引发冲击地压的机理。
The formation of thin coal shell that is formed by aerofoil cracks engendered at the tip of primary cracks in the entry's surrounding coal is analysed.
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