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Çѱ¹Áö¹Ý°øÇÐȸ / v.19, no.2, 2003³â, pp.75-85
ÅͳΠ¹ßÆÄ¼³°è ÃÖÀûÈ­¸¦ À§ÇÑ ½ÇÇè ¹× ¼öÄ¡ÇØ¼®Àû Á¢±Ù
( Experimental and Numerical Approach foy Optimization of Tunnel Blast Design )
ÀÌÀθð;±è»ó±Õ;±ÇÁö¿õ;¹ÚºÀ±â; °í·Á´ëÇб³ Åä¸ñȯ°æ°øÇаú;¢ß¼®Å¾ ¿£Áö´Ï¾î¸µ;¢ßû¼®¿£Áö´Ï¾î¸µ;°í·Á´ëÇб³ Åä¸ñȯ°æ°øÇаú;
 
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È­¾àÆø¹ß·Î ¹ß»ýÇÑ ÀÀ·ÂÆÄ ÀüÆÄƯ¼ºÀ» ÆÄ¾ÇÇϱâ À§ÇÏ¿© È­¾àÁ¾·ù, Àå¾àÁ¶°Ç, ÀüÆÄ¸ÅÁúÁ¶°Ç º°·Î ½Ç³» ¸ðÇü½ÃÇè ¹× ÇöÀå ¾Ï¹Ý½ÃÇè°ú ¼öÄ¡ÇØ¼®À» ½ÃÇàÇÏ¿´´Ù. ¼öÄ¡ÇØ¼®Àº ½ÃÇèÁ¶°Ç°ú µ¿ÀÏÇÑ Á¶°ÇÀ» ¸ðµ¨¸µÇÏ¿© ½ÃÇàÇÏ¿´´Ù. 2°øÀ» µ¿½Ã ¹ßÆÄÇÏ´Â °æ¿ì¿¡ 2°ø Á߽ɿ¡¼­ ÀÀ·ÂÅ©±â´Â 1°ø ¹ßÆÄº¸´Ù 2¹èÁ¤µµ·Î Áõ°¡µÇ¾ú´Ù. ÃÖ´ëÀÀ·Â µµ´Þ½Ã°£Àº µðÄ¿ÇøµÀåÀüÁ¶°ÇÀÌ ¹ÐÀåÀüÁ¶°Çº¸´Ù 2¹èÁ¤µµ Áö¿¬µÇ¾î¼­ °¡½º¾Ð·Â¿¡ ÀÇÇØ ÃÖ´ë ÀÀ·ÂÀÌ ¹ß»ýÇÏ¿´´Ù. ½ÃÇè°á°ú¿Í ¼öÄ¡ÇØ¼®°á°ú¸¦ ºñ±³.ºÐ¼®ÇÑ °á°ú ¼öÄ¡ÇØ¼®°á°ú°¡ ½ÃÇè°á°úº¸´Ù ¾à°£ ÀúÆò°¡µÇ¾úÁö¸¸ ºñ±³Àû À¯»çÇÏ¿© ¼öÄ¡ÇØ¼®À¸·Î ¹ßÆÄ°á°ú¸¦ ¹Ì¸® ¿¹ÃøÇÒ ¼ö ÀÖ¾ú´Ù. µµ·ÎÅͳÎÀÇ ÀϹÝÀûÀÎ ¹ßÆÄÆÐÅϵµ¿¡ ´ëÇÏ¿© ¼öÄ¡ÇØ¼®À» ½ÃÇàÇÏ°í ¿Ü°û°ø°ú ¿Ü°û°ø°ú ÀÎÁ¢ÇÑ È®´ë°ø ¹ßÆÄ·Î ÀÎÇÏ¿© ¹ß»ýÇÏ´Â µ¿Àû ¾Ï¹Ý°Åµ¿ ¹× ¾Ï¹Ý¼Õ»óÀ» Æò°¡ÇÏ¿´´Ù. ¼öÄ¡ÇØ¼®°á°ú È®´ë°øÀÇ ¼Õ»ó¿µ¿ªÀÌ ¿Ü°û°øº¸´Ù Å©°Ô ³ªÅ¸³µ´Ù. È®´ë°ø ¼Õ»ó¿µ¿ªÀ» °¨¼Ò½Ã۱â À§ÇÏ¿© ³·Àº ¹ÐµµÀÇ È­¾à»ç¿ë, µðÄ¿ÇøµÀåÀü, È®´ë°ø°ú ¿Ü°û°ø»çÀÌÀÇ °Å¸® Áõ°¡ µîÀÇ ¹æ¾ÈÀ» Á¦¾ÈÇÏ¿´´Ù.
Laboratory model blast and in-situ rock blast tests were conducted to determine blast-induced stress wave propagation characteristics under different explosive types, different loading conditions and different mediums. Dynamic numerical approaches were conducted under the same conditions as experimental tests. Stress magnitudes at mid-point between two blast holes which were detonated simultaneously increased up to two times those of single hole detonation. The rise time of maximum stress in a decoupled charge condition was delayed two times that of a fully charged condition. Dynamic numerical analysis showed almost similar results to blast test results, which verifies the effectiveness of numerical approaches fur optimizing the tunnel blast design. Dynamic numerical analysis was executed to evaluate rock behavior and damage of the contour hole, the sloping hole adjacent to the contour hole in the road tunnel blasting pattern. The rock damage zone of the sloping hole from the numerical analysis was larger than that of the contour hole. Damage in the sloping hole can be reduced by using lower density explosive, by applying decoupled charge, or by increasing distance between the sloping hole and the contour hole.
 
Ű¿öµå
Blasting pattern;Blast test;Damage zone;Numerical approach;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.19, no.2, 2003³â, pp.75-85
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311921640728)
¾ð¾î : Çѱ¹¾î
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