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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.4, 2004³â, pp.89-102
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ÅÍ³Î¹ßÆÄ·Î ÀÎÇÑ ±¼Âø¼±ÁÖº¯ ¾Ï¹Ý°Åµ¿ÀÇ È®·ü·ÐÀû ¿¬±¸
( Probabilistic Analysis of Blasting Loads and Blast-Induced Rock Mass Responses in Tunnel Excavation ) |
| ÀÌÀθð;¹ÚºÀ±â;¹Úä¿ì; °í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇкÎ;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇкÎ;µ¿Àϱâ¼ú°ø»ç, Áö¹Ý»ç¾÷ºÎ;
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| µðÄ¿ÇøµÀåÀüÁ¶°ÇÀÇ È¾à Æø¹ß½Ã ¹ß»ýÇÏ´Â ¹ßÆÄ¾Ð·ÂÀº ÃÖ´ë¾Ð·Â, ÃÖ´ë¾Ð·Â µµ´Þ½Ã°£, ¾Ð·ÂÆÄÇüÀÇ ÇÔ¼ö·Î ³ªÅ¸³´Ù. ¹ßÆÄ ÃÖ´ë¾Ð·Â°ú ÃÖ´ë¾Ð·Â µµ´Þ½Ã°£Àº Ⱦà°ú ¾Ï¹Ý Ư¼ºÀÇ ÇÔ¼öÀÌ´Ù. Ⱦà°ú ¾Ï¹ÝƯ¼º½ÃÇè °á°ú·ÎºÎÅÍ ±× Ư¼ºÄ¡ÀÇ È®·üºÐÆ÷¸¦ »êÃâÇÏ¿´´Ù. Ⱦà°ú ¾Ï¹Ý Ư¼ºÄ¡ÀÇ È®·üºÐÆ÷°¡ Á¤±ÔºÐÆ÷·Î ³ªÅ¸³µÀ¸¹Ç·Î ¹ßÆÄ ÃÖ´ë¾Ð·Â°ú ÃÖ´ë¾Ð·Â µµ´Þ½Ã°£ÀÇ È®·üºÐÆ÷µµ Á¤±ÔºÐÆ÷·Î ÃßÁ¤µÇ¾ú´Ù. ¹ßÆÄ ÃÖ´ë¾Ð·Â°ú ÃÖ´ë¾Ð·Â µµ´Þ½Ã°£¿¡ °¡Àå Å©°Ô ¿µÇâÀ» ¹ÌÄ¡´Â º¯¼ö¸¦ ÆÄ¾ÇÇϱâ À§ÇÏ¿© ¸Å°³º¯¼öºÐ¼®°ú ºÒÈ®Á¤¼ººÐ¼®À» ½ÇÇàÇÏ¿´´Ù. ÃÖ´ë¾Ð·Â°ú ÃÖ´ë¾Ð·Â µµ´Þ½Ã°£Àº ¸Å°³º¯¼öºÐ¼®°á°ú È¾àÆ¯¼º¿¡ °¡Àå Å©°Ô ¿µÇâÀ» ¹Þ¾ÒÁö¸¸ ºÒÈ®Á¤¼ººÐ¼®°á°ú Ⱦຸ´Ù ¾Ï¹ÝƯ¼º¿¡ Å©°Ô ¿µÇâÀ» ¹Þ¾Ò´Ù. ¹ßÆÄ·Î ÀÎÇÏ¿© ±¼Âø¼±ÁÖ º¯ ¾Ï¹Ý¿¡ ¹ß»ýÇÏ´Â ¼Õ»óÀ» ¼öÄ¡ÇØ¼®À¸·Î ºÐ¼®ÇÏ¿´´Ù. ¾Ï¹Ý¼Õ»óÀ» »êÁ¤Çϱâ À§ÇÏ¿© ¿¬¼Óü¼Õ»ó¿ªÇп¡ ±âÃÊÇÏ¿© »ç¿ëÀÚ ºÎ ÇÁ·Î±×·¥À» ÀÛ¼ºÇÏ¿´´Ù. ÀÌ ºÎ ÇÁ·Î±×·¥À» ABAQUS ÁÖ ÇÁ·Î±×·¥°ú ¿¬°áÇÏ¿© ÇØ¼®ÇÏ¿´´Ù. µ¿Àû ÇØ¼®°á°ú´Â È®´ë°ø ¹ßÆÄ¿¡ ÀÇÇÑ ¼Õ»óÀÌ ¿Ü°û°øº¸´Ù Å©°Ô ³ªÅ¸³µ´Ù. È®´ë°ø ¹èÄ¡, ¾Ï¹ÝºÐ·ù ¼¼ºÐÈ µî ¿©±¼¹æÁö ¹æ¾ÈÀÌ Á¦¾ÈµÇ¾ú´Ù ¼Õ»ó°è¼öÀÇ ÆÄ¼â±âÁØÀÌ ºÒ¸íÈ®ÇϹǷΠfuzzy-random È®·üÀÌ·ÐÀ» Àû¿ëÇÏ¿© ÆÄ¼â±âÁذú ÆÄ¼â¿µ¿ªÀ» ¸íÈ®ÇÏ°Ô ³ªÅ¸³»¾ú´Ù. |
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| The generated blasting pressure wave initiated under decoupled-charge condition is a function of peak blasting pressure, rise time, and wave-shape function. The peak blasting pressure and the rise time are also the function of explosive and rock properties. The probabilistic distributions of explosive and rock properties are derived from the results of their property tests. Since the probabilistic distributions of explosive and rock properties displayed a normal distribution, the peak blasting pressure and the rise time can also be regarded as a normal distribution. Parameter analysis and uncertainty analysis were performed to identify the most influential parameter that affects the peak blasting pressure and the rise time. Even though the explosive properties were found to be the most influential parameters on the peak blasting pressure and the rise time from the parameter analyses, the result of uncertainty analysis showed that rock properties constituted major uncertainties in estimating the peak blasting pressure and the rise time rather than explosive properties. Damage and overbreak of the remaining rock around the excavation line induced by blasting were evaluated by dynamic numerical analysis. A user-subroutine to estimate the rock damage was coded based on the continuum damage mechanics. This subroutine was linked to a commercial program called 'ABAQUS/Explicit'. The results of dynamic numerical analysis showed that the rock damages generated by the initiation of stopping hole were larger than those from the initiation of contour hole. Several methods to minimize those damages were proposed such as relocation of stopping hole, detailed subdivision of rock classification, and so on. It was found that fracture probability criteria and fractured zones could be distinctively identified by applying fuzzy-random probability. |
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| Ű¿öµå |
| Blasting pressure;Damage;Decoupled charge;Sensitivity analysis;Uncertainty analysis; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.4, 2004³â, pp.89-102
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922383259)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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