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meiyan215(½ð±Ò+1): ¸Ðл»ØÌû 2011-12-07 19:28:41
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2Â¥: Originally posted by toreador at 2011-12-07 19:03:21:
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Based on a number of experiments on equivalent materials and field observation,the break and moving features of separative roof in a large area has been analyze ...

Based on a number of experiments on equivalent materials and field observation,the break and moving features of separative roof in a large area has been analyzed.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.Then according to the moving tendency of the roof and its effect on the face supports, therational support resistance and auxiliary roof control means ...
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         The "breaking edge" phenomenon produced in the cutting process is analyzed theoretically. The effective preventive measures for the "breaking edge" phenomenon are also presented.
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meiyan215(½ð±Ò+1, ·­ÒëEPI+1): ¸Ðл»ØÌû 2011-12-07 19:28:20
°®ÓëÓêÏÂ(½ð±Ò+1): 2011-12-08 08:50:04
sltmac(½ð±Ò+1, ·­ÒëEPI-1): EPI·¢·ÅÓÐÎ󣬻¶Ó­³£À´ 2011-12-10 14:10:58
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1Â¥: Originally posted by meiyan215 at 2011-12-07 17:36:58:
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Based on a number of experiments on equivalent materials and field observation,the break and moving features of separative roof in a large area has been analyzed.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 Sample Text of the face.Then according to the moving tendency of the roof and its effect on the face supports, therational support resistance and auxiliary roof control means ...
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         The "breaking edge" phenomenon produced in the cutting process is analyzed theoretically. The effective preventive measures for the "breaking edge" phenomenon are also presented.
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meiyan215(½ð±Ò+5): ·Ç³£¸Ðл£¬ÎÒ¾õµÃÕâÑù·­ÒëºÜ׼ȷ£¬×Ô¼ºÔõôûÏëµ½ÄØ£¬ºÇºÇ 2011-12-07 19:29:19
°®ÓëÓêÏÂ(½ð±Ò+1): 2011-12-08 08:50:17
sltmac(½ð±Ò+2, ·­ÒëEPI+1): 2011-12-10 14:11:05
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4Â¥: Originally posted by songe0310 at 2011-12-07 19:18:07:
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