据此提出了该类顶板条件下顶板控制设计的新思路：设计中应首先考虑把顶板的再断裂控制于切顶线之外，然后结合顶板的运动趋势及其对工作面支架的影响合理选择支护阻力以及其它辅助控顶措施。

Thispaper puts forward a new idea of the roof control design under such roof conditions. Firstof all, it is necessary to keep the re-break of the roof outside the breaking edge of the face.

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房顶。检查一下屋顶，看是否有打卷、磨坏或缺少的屋顶板(或瓦片)，需要的话进行更换或维修。

Roof. Examine the roof looking for curling, worn or missing shingles (or tiles). Replace or repair as needed.

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检查一下屋顶，看是否有打卷、磨坏或缺少的屋顶板(或瓦片)，需要的话进行更换或维修。

Examine the roof looking for curling, worn or missing shingles (or tiles). Replace or repair as needed.

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