并根据保护层开采的应力卸压保护准则和变形保护准则，确定保护层沿倾向和走向的保护范围。
According to the protection rule of the deformation and stress-relief in exploiting protective layer, the inclination and strike protection scopes of protective layer are located.
并根据保护层开采的应力卸压保护准则和变形保护准则，确定保护层沿倾向和走向的保护范围。
According to the protection rule of the deformation and stress-relief in exploiting protective layer, the inclination and strike protection scopes of protective layer are located.
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