冲击荷载作用下磁铁石英岩破碎能耗分析-矿业114网 
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冲击荷载作用下磁铁石英岩破碎能耗分析
2014-09-11
应用SHPB试验设备对磁铁石英岩进行不同速度条件下的冲击试验,基于试验结果,分析了岩石类材料 在冲击荷载的作用下其能量的耗散规律和块度分布情况,建立了磁铁石英岩破碎块度与能耗关系模型,提出了岩石 应变率强度指数和能时密度概念,揭示了岩石破碎有效能耗不仅与能量输入大小有关,而且与能量的时间强度密切 相关。通过对冲击试验中不同输入能量条件下的磁铁石英岩的破碎粒度统计分析,对比采集到的反射应力波作用时 间和强度,初步建立了岩石动态强度的应变率关系模型和能时密度模型,将炸药能量输出结构这一概念通过具体指 标作了定量表述,建立起了炸药能量输出与岩石破碎能耗间的内在联系,为研究炸药与岩石能量耦合...
Series No 458ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ Augustꢀ 2014 !ꢀ ꢀ "ꢀ ꢀ #ꢀ ꢀ $ 20%14&(4&588'' ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ METAL MINE · !"#$· ! "#$%&'()*+,-./012 ! "# ꢀ $%& ꢀ '() ꢀ * ꢀ + ( )*+,-.#/01.2, )* 3$ 114051) - ꢀ .ꢀ ;< SHPB =>?@ABCDEFGHIJKLMNOPQR=>, 'S=>TU, VWXFDYZ[ \ ;  ‹ ¨ 7 QR]^P_<O`abPcdefghLVijk, lmXBCDEFnohLpacqrst, uvXFD wxyLz{ga|}L~, €XFDno‚ƒacI„pabꢀ†‡ˆ‚q, ‰ŠpabP|‹yL}Œ q。 ŽAQR=>IJꢀ†abMNOPBCDEFPno‘L’“VW, A”•–—P˜™;š›_<| gyL, œlmXFDžŸyLP;wxqrstga|}Lst, ꢁ¡¢abꢀvT£¤¥~Ž¦§z _X©bª«, lm¬X¡¢abꢀvpFDnoac‹P­\®r, ¯67¡¢pFDab°±uvX²P6 ³´。 / 01ꢀ 456ꢀ 789:ꢀ ;<=>ꢀ =?@A ꢀ ꢀ 23456ꢀ TD313, TD315ꢀ ꢀ 789:;ꢀ Aꢀ ꢀ 7<=6ꢀ 10011250( 2014) 0800105 Analysis on the Fragmentation Energy Consumption of Magnetite Quartzite under Impact Loads Guo Lianjunꢀ Yang Yuehuiꢀ Zhang Daningꢀ Li Lin ( School of Mining Engineering, University of Science and Technology Liaoning, Anshan 114051, China) Abstractꢀ Impact tests are conducted on magnetite quartzite samples by using SHPB apparatus with different impacting velocities. Based on the test results, the law of energy dissipation and fragmentsize distribution of rocky materials under impac ting loads was analyzed, and then the relation models of the fragmentation energy consumption of magnetite quartzite were set up. The concepts of strain rate intensity index and energytime density were suggested. The concepts reveal that the effective energy consumption is not only associated with the totally input energy, but also is closely related to the energytime density. By analyzing the samples fragmentation and compared with sustains time and strength of reflect stress waves, the relationship mod els of dynamic strength of rock related to strain rate and energytime density were established initially. From this, the notion of energy output structure was described quantitatively, and the bridge of explosives energy output to energy consumption of rock fragment was set up, and a new idea of energy coupling between rocks and explosives was proposed as well. Keywordsꢀ Strain rate, Impact breaking, Effective energy consumption, Energy density per unit time ꢀ ꢀ \QRMNO, ;š›µ¶XFDZ[#·¸\ U。 ý67Ý< SHPB =>þÿ, îA•#‡!"C #PBCDEFGH$%QR&'=>, €\IJ PQRKLMNOFDnóÞPabcd(), \Õ'*+lmâa|}L¯'*PFDžŸno acst, ò‰¯\Ïn,ސ¡¢pFDPab° ±_<67u-²P³´。 P¹ºIJ»¼P½¾、 ¿À、 ÁÂÃ, ÄÅFDPn oÆÇ、 FDPžŸnoÈÉÊ¡¢pFDP°±_ < efASËÌ¡¢acgÍÎÏnnoƒU¦‚ ЩÑÒÓ。 ÔÕ67Ö×ØaÙڇÛL܂ƒ Ý<Ï¡QRÞß8Pab, àáâã䂃a bPåd概Éçèégêëìí。 îA¤¥ï ð, !­ñGHX‡bP67。 òFDnóÞPa 1ꢀ SHPB >? SHPB þÿ./§?@、 a0r’、 •–r’ 3 ‡sh£Ç。 ?“P&123¯ 50 mm g 75 mm, †™1p4™15ú¯ 1 200 mm, ™65 200 mm g bcdpôõÉçVW[ 12] , —{ísög=>67 ÷øùT±PžŸê>67[ úûüX‚ƒÇ 35] 2 ! % ) "#$ꢀ 20140509 &'(ꢀ !"#$%&'()*( +,: 51174110) 。 *+,ꢀ -./( 1963— ) , 0, 12, 34, 546789:。 · 1· % & 458 'ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ !ꢀ ꢀ "ꢀ ꢀ #ꢀ ꢀ $ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ 2014 (& 8 ' 3 00 mm。 ™ 6 Ê & 1 Z [  J, 6 Ñ s b ¯ 210 W = W - ( W + WT) , ( 1) Ž, W ¯FDnoac, W 、 W 、 W V|¯†™ L I R T ›、 ˜™›、 4™›{ˆ‰Pab, á⎏&1; L I R 3 GPa, 78” 0 3, }L¯ 7 800 kg / m 。 = >9û»¼¯ 50 mm × 25 mm PBCDE F=:;<IJQRKLMNOP=>, =>=>? @ 3 A, B“ 5 >。 ¦§ê>CÖO: 1) =>;DE, FG=>þÿHIJSKLP _MŸ, ꢀuEÌ_LP¨NBCDEF=NOP šp|‹Pqr“zve。 τ Wi = ( A1 C1 / E1 ) σ2i ( t) dt, ( 2) ∫ 0 ( Ž ’ š š , i ∈ { I, R, T} , A ¯&1PR‘; C ¯&1 1 1 , ›KL; E ¯&16Ñsb; σ ( t) ¯ t |“†™; 1 I QRúSTUVW, õÿS†™1g4™1X‹, Y Z‹ÆÇ[}\], ^ꢀ›Æ_Æ`aS†™1E Q。 ; σ ( t) ¯ t |“˜™;š; σ ( t) ¯ t |“4™; R T 。 \ QR=>MNO, FD\noÞ{åcP ( 2) bžc^þÿ, <IJQRd&, efû\ IJPQRKLMNOPFDnó=>{g, ꢀ¤h gÝ<ÏKiʞŸ;wj=r’klp¸m¬ ab”•<noac¤P•Az¨ñ, –‚—ñ¥P A˜bz¨, ™æH$š§‘PF:{åcPa b, \Õáâ•<noac}L ρL eª。  { e。 ρ = W / V, ( 3) L , ρ ¯noac}L; V ¯F:P§‘, $š›g L ( 3) ng{gJÉP‚qr’pÞo, ꢀklp Ž L jk9©。 ¸ mOeP=>{gGHVW, üvqPš&p b, ò‰fûq>A;Pnoac、 ;wx、 rúhL Ã, ^â¤hz¨¯'*, esìFDPnóƒU, ¯ tuP67vwx。 2  2ꢀ NTPRUVWXYZ › g=>TU, œ 1 ¯BCDEF\ 5 >IJQ RKLOPrú;wxpnoacqrViœ。 = >Tyt, Ý<“zÈGH{gJÉpVW, j=“zTUÖª 1 {。 @ 1ꢀ ABCDE>F SHPB GHIJ>?KL Table 1ꢀ Tests result of magnetite quartzite samples under impact load by SHPB a| žŸ} &yL QR no _< |5 T / μs rú; wx- 1ε / s = > }L + , KL V ac/ JW L > | ( J/ (Ks· kg) ) 3 σ d / ( m/ s) / / MPa 1 - 1 7 69 7 21 7 31 9 39 9 60 9 50 26 67 36 88 35 58 53 74 46 75 56 19 211 8 166 8 204 2 233 2 57 4 51 3 55 4 70 4 97 6 00 110 76 102 28 95 56 44 5 1 1 - 2 55 6 43 4 76 4 62 0 68 7 88 7 77 9 85 1 113 3 1ꢀ VWXYZUNTPR/[ 1 2 - 3 - 1 Fig. 1ꢀ The relationship between energy consumption of fragmentation and average strain rate 110 28 105 88 137 57 2 3 4 5 2 - 2 191 8 191 òœ 1 áâv, noacžrú;wxPŸꢁ 2 3 - 3 ¡ +Ÿ¢£, ‡Ä¯º)Žqr, ¤rú;wx¯ - 1 12 22 136 14 190 2 14 59 114 91 18 98 137 90 17 03 125 88 20 59 155 37 28 09 135 06 13 68 140 72 27 09 181 53 33 36 171 26 18 48 175 36 02 87 s - |, noac¯ 33 04 J, ¤rú;wx¥ 1 1 3 - 2 12 03 135 43 145 4 - 1 3 4 - 3 12 35 155 75 186 4 ‡¯ 176 05 s |, noac¥c— 238 93 J。 ¤ª - 1 14 18 174 77 173 ¦ ž ¥ ™ FDP;wx§‡, noacíæ§ꢁ, 7`¨Ô, ©QRKLPIªŸꢁ, FD­«P¬™\­u c, æFDP›®}‰¯, `{í\Iªãˆ, ‰˜ ;š›§e§‡, æ°±Çrú;wxIª¥c。 4 - 2 14 36 193 48 140 4 137 4 5 - 3 14 45 111 96 166 8 - 1 16 91 270 59 203 6 154 183 5 - 2 17 27 251 42 153 6 190 \¤¥ÞFD¬ÞL§e§‡, ™æHJSB 5 - 3 17 08 194 79 214 8 185 CDEF­«P²½¾³´¬½pµ<, ÚtÆǶ PR, ±ÇFDPn½; \·QR=>, BCD EFâ¸%¹º¹P»¼½½nó¯/, ò²½¾P ½、 µ<¾¿ÚtÆǶŽ, IÀ‹vÁ½½rR, ©½½rRPw‡, ©°åc§e§ºPabe ÃÄÅÆ。 2 ꢀ >?4M Ž 2  1ꢀ ECGHNOPQRS SHPB =>Þ, \I~`€abcPE ¬ uMNO, ‚?QƒPža„ꢀ†‡¯†™›{ˆ‰ Pab。 ŠFDPabcd/‹p†™›、 ˜™›、 ž 4 ™›{ˆ‰Pab‚q, FDnoŒPab · 2· ꢀ ꢀ ꢀ BCDE: 78FGHIJKLMNO9:=>PQꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ 2014 (& 8 ' 2  3ꢀ PR\]U^_P Ý<ÇÈö±PºÉ, ꢀBCDEFnoÞ Pac}LpQR†™aGHö±ÊË, áâÌÌÇ Öœ 2 {ÇÈ。 3 3ꢀ ABCDEabcd4efg Fig. 3ꢀ The fragmentation size distribution curves of magnetite quartzite samples □ △ ■ ● — î 1 >; — î 2 >; — î 3 >; — î 4 >; — î 5 > @ 2ꢀ ABCDEVWhijk ◇ 3 2ꢀ PR\]U^_P/[ Table 2ꢀ The average fragmentation size of magnetite quartzite samples Fig. 2ꢀ The relationship between density of energy consumption and input energy = >>| 1 2 3 4 5 òœ 2 áÍ, BCDEFPnoac}Lg†™ rú»¼/ mm 19 37 12 23 6 81 4 16 3 05 aX‹¡º)Žqr, ^Šö±ÞLÎL, ac}L rú»¼\IªP㈤, íZX‹^ïHð$P ÈÑqr。 ac}L§‡, FDPnoÞLæ§ꢀ, H.S$š§‘PFD{åcPab§º, \FD ž †™aP¥c‰¥c。 FDZ[\QRÞ{ åcPab‡ˆHÏкÔÑÒÓP, ÒÖZ[ý· P(Ñ、 ÓÀx、 FD­«Ô‘P‡ˆÃ, \FD=: ¤ PwÆgnóæ°‚§ºPab<SFDP¬, ò‰cñ²ò½¾Póô、 µ<g¶Ž, ò‰8Çõ ºPn½R, 9ÄvÁõºIJ»¼Poh。 » ž 9 ¼JPMNO, †™a¥c, A;Pnoac™ X¥c, `­«²½¾µ<P{b槺, ò‰æ ÄFD=:noPhLwˆ。 2  4ꢀ NT`]UPR\] \ QR]^P_<O, F:ÕÖoÇIJ‡ˆP h§, =>Tyt, –¤hoh, ^GHԑViP ’ “。 \ ýAGHԑViP’“Þ, 9<PVW × Ó23nA¯ 2 36, 4 75, 9 5, 13 2, 16, 19, 26 5 mm B 7 P×Ø。 ꢀÙ9F:V|òڗÛnA × , $t<ÜrÝbÞ¸\q×+PF:ßb。 ÌÌ 3 4ꢀ VWhiUPR\]4efg Fig. 4ꢀ The distribution curve of average size with density of energy consumption ÇԑØàViÇÈ, ֜ 3 {, òáâv, B CDEF\QRKL¯ 7 40 m/ s PMNO, J\‡ S 16 mm ×Ó»¼+P= : á “ × â ã V ” H 3 ꢀ Pl\]4M 3  1ꢀ XYZm]nPl\] 5 4 20% , 䞩QRKLPuꢀ, å6{ˆ‰Pža ERöçXBCDEFnohLpacPqr, ¥ ‡, FD=:nothL³´wˆ, FD:æP‡ ¼h§PãV”çb\Iªèé。 gœ 3 {Ô‘ØàViÇÈ, Êv×OᓠãV”¯ 50% |{A;P×Ó»¼, _¯FhPr ú»¼, Öª 2 {。 4 V|êvXBCDEFJSIJPQRK LXOnotP=:rú»¼pac}LX‹Pw J|™öçXacp;wxqr, œ 5 H\IJPQ RKLO, BCDEFP;wxÊ{A;PžŸ}& yL=>TUw‡qr。 òœ 5 áâv: =:Pž » › Ÿ }&yLž©;wxPuꢀ‰w‡, íZX‹Hë ìqr, ÇÈö±ÞLAÎꢀ。 œ Ô¯FDZ[­«÷øXIJ»¼P²½¾、 ¿ À、 ÁÂÃ, FD=:PnóÞòýß+eùæH q÷ÁÂPµ<Þ, ž©FDZ[P;wxPu ‡ jk。 òö±jke, BCDEF=:notP rú»¼pac}LHëìqr, íZqr{¯  96。 ¤ª¦, ž©ac}LP¥c, F:notP ꢀ , `­«P½¾{b¥º, A;Pæú‹õºP 0 ab。 áH=:\û`üýP|‹ù­, ϗQR] · 3· % & 458 'ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ !ꢀ ꢀ "ꢀ ꢀ #ꢀ ꢀ $ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ 2014 (& 8 ' ú‹Pab00‡S`µ<PabúÊ。 \~Q R]^_<|5PjkO, 1†a|}L, \úÊÎ äPabáâÅü2h½¾¶ŽE, ‚õºPab< SFD½¾Pß8, \J¥|‹­, FDZ[ŒP ab§º, æ°vÁõºP½¾、 ¿À、 ÁÂÃpp— FDP­«¬, 9Ä=:nóÞL3?。 3 5ꢀ ECopm]UXYZ/[ Fig. 5ꢀ The curve of rock dynamic strength with stain rate P_<O, ý·^Iaّá—÷þPab, ÿ‚ ^ Ž !"Suꢀ;š, e#—r˜ñ$Pab, ™æ vÁX=:PžŸ}&yLž©;wxPuꢀ‰w ‡ 。 3 6ꢀ XYZUPl\]/[ FD\QR]^_<O, yLžñ«]^Pw‡ Fig. 6ꢀ The curve of energy density ‰ ; ' Íw, ÔÕ`žŸ(%HPw‡b, &ç`w;š、 w–HnoƒUúž©;wxPw‡‰w‡, Ž (VW, áâlmBCDEFPžŸyLp;wx per unite time with strain rate \ ê4,ÞÏn, a|}L K ˜*PH¡¢ 3 PÑa, ASÏn, FD;wxyLr{áâ5¯p qrst。 6 ­=>H7P, 8a|}Lp6­=>HI¥: σ = K εK2 , ( 4) 1 P, `abꢀ†ÆŽIJ, ÏnPabꢀ†H23¯ Ž , K1 , K ªFD;wxyLr{。 2 D P9Ӑþ:$šꢀL, }L¯ ρ0 P¢;¹{Ï 0 ¤ ) K , K ˜*PHFDPžŸyLpwÆ( 1 2 nPF§ôõPab。 Ñ。 \IJQRyLO, FDªÁvIJPwÆK x, ™+vIJPžŸyL, IJFDyLž;w x‚efw‡, ¤Pz{qráâ“,FDPžŸÏ πD Qρ0 D, 0 K3 = ( 6) 4 Sρ 1 Ž , D ¯9Ó23, m; Q ¯¡¢PÏ<, J/ kg; ρ ¯ 0 0 š wÆ(%; ò—¥ºReù, ÒÓFD;wxPI HFDý·PÑß, †™aPT£(%™H?‹Ô þ¢}L; D ¯¡¢ÏK, m/ s; S ¯9Ó=>R‘; ρ 1 „ 3 ¯ FD}L, kg / m 。 Ñ。 †™aPT(%I„-.abP‡ˆ, ™-. abP_<|‹, ¤÷‰‚|‹yLPabT£Õ© é¯a|}L, IJa|}LPabꢀ†—FD° ü—¥r/°±qr, ¤÷qrá ¡¢pFD no‹P‚ƒab°±_<ef。 › gê>áâlma|}Lp;wxX‹PŽ <qrŽÖŽ( 9) , ` α1 , α2 , α3 ©é¯†™a;w xz{。 2 ε′ = α1 K + α2 K3 + α3 , ( 7) 3 \ QRê>r’, a|}L K HQR1$š ASBCDEF, 3 α = 3 × 10-8 , α = 0 001 4, α3 = 94 469 3 2ꢀ Pl\]UNTqL › g?>, 9û R - R Vi@{VW=Nnoƒ | ‹­ꢀ†—$š§‘=NPab。 1 2 ( WI - W - WT) R TVρ K3 = , ( 5) Ž , T ¯˜™›_<|‹; V ¯=N§‘; ρ ¯=N U, A } L。 x n ( ) x0 ) , - y = 100( 1 - e ( 8) œ 6 H\IJPQRKLO, BCDEFP;w xpa|}Lqr。 òœ 6 áâv: ¤rú;wx Îé|, a|}LíAΈ, nohL‡; ˜X, a }L‡, nohLˆ, =:Pa|}Lž©rú; Ž , y ¯×O?bá“ãV”, % ; x ¯Fh»¼, mm; x ¯(%»¼, mm; n ¯FhPúSr{。 0 ABAê>tP=NnohLGH×V’“, ^ GHö±VW, fü=>tBCDEF\IJQRK LOPP‘LViP(%p{Öª 3 {。 | wxP¥‡‰¥‡, =:PnohLŠ§e§ˆ。 ò FDZ[ª½e, FDPnóÞæH­«¬c ñ, 9Ľ¾Pß8、 µ<¾¿ÆǶŽ, ‰ß8½¾ · 4· ꢀ ꢀ ꢀ BCDE: 78FGHIJKLMNO9:=>PQꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ 2014 (& 8 ' @ 3ꢀ ABCDE`]4ersfgtu r, OZ¡ÁvqÑ, FDP;wx§‡, noac íæ§ꢀ; noac}Lg†™aX‹L¡º)Žq r, ^Šö±ÞLÎL, ac}Lž†™aP¥c‰ Table 3ꢀ Parameters of fragmention size distribution fitting curves of magnetite quartzite samples ¥ c。 ( %»¼ > | ö±ÇÈ qr{ úSr{ / mm ( 2) òö±jke, BCDEF=:notP 1 y = 0 815 3x - 2 818 5 y = 1 491 3x - 3 937 6 y = 1 274 5x - 2 815 y = 1 110 6x - 1 908 6 y = 0 972 6x - 1 449 3 0 934 3 0 987 2 0 992 6 0 980 3 0 975 7 31 72 14 01 9 1 5 57 4 44 0 815 3 1 491 3 1 274 5 1 110 6 0 972 6 rú»¼pac}LHëìqr, íZqr{¯ 0 96, ac}L§‡, FDPnoÞLæ§ꢀ, ×Oá “ãV”çbw‡ML\IJPKLMNO'ýN ­¥Ä。 2 3 4 5 ( 3) FD;wxyLr{ga|}L~aÙ GO‰ðP܀FDPžŸ(ÑÊ`pabꢀv ꢀ ꢀ òœ 7 (%»¼pa|}Lqrv, (%» ž©a|}LPIª¥‡‰ãˆ, ™æHC$š| ­BCDEFåcPab§º, =:noæ§3 , (%»¼™æ§ˆ。 ¤H.Sž©noacP¥ ( { ¢ ыPqr, ‰FDnoƒUpFD;wxyLr gnoa|}LÃp{Pqr67ႃz9¡ pFDP‚ƒ°±_<efQö。 ¼ ‹ ? c, AJ¥eDPFD=N‰¯, _<`+Pab§ e§º, 9Ä­«¸\Pq÷»LP½¾µ<§÷ V, oh§º, noÞLEc3?, (%»¼í™æ§ tꢀ zꢀ 7ꢀ 8 [ [ [ [ [ 1] ꢀ Rgr, STU, Vꢀ W, Ã. FDnóPabVWœQ[ J] . F Dš&p,Þ&X, 2005( 15) : 26032608. ˆ 。 QR]^P_<O, FDohP(%»¼\¥© ÞL+™HnóƟP˜*, õáâ+vabPå cjk。 Xie Heping, Peng Ruidong, Ju Yang, et al. On energy analysis of rock failure[ J] . Chinese Journal of Rock Mechanics and Engineer ing, 2005( 15) : 26032608. 2] ꢀ ꢀY&, Z[Ž. QR^]_<OFD¬Pabcd[ J] . F Dš&p,Þ&X, 2003( 11) : 17771780. Gao Wenxue, Liu Yuntong. Energy dissipation of rock damage under impact loading[ J] . Chinese Journal of Rock Mechanics and Engi neering, 2003( 11) : 17771780. 3] ꢀ R\], ^_`, ab/. QR^]_<OFDno{ísöÊ = >67[ J] . !cd, 2007( 5) : 59. Xie Shiyong, Wang Yanxia, Zhao Fujun. Numerical simulation and experimental research on rock fragmentation under impact loading [ J] . China Tungsten Industry, 2007( 5) : 59. 3 7ꢀ vwhiUPl\]x/[ 4] ꢀ Wef, ghi, jkU. F:$%&'wÆnópab(%6 7 Fig. 7ꢀ The curve of features size [ J] . l§š&&X, 2006( 2) : 213216. with energy density per unit time a|}L_¯“,¡¢abꢀvT£(%Pz Yang Shengqi, Xu Weiya, Su Chengdong. Study on the deformation failure and energy properties of rock specimen in uniaxial compres sion[ J] . Chinese Journal of Solid Mechanics, 2006( 2) : 213216. 5] ꢀ -./, Wmn, opç, Ã. QR]^_<OqrFžš(Ñ ¨ , ˜*vabꢀ†FåcPžŸ(%, ¦‚GHP IÉèé。 îAIJFDno‚ƒacpa|}L qr67âÊab°±ef67JKfü²G<。 = >VW[ J] . ,ÞÏn, 2014( 1) : 14. Guo Lianjun, Yang Yuehui, Hua Yuehan, et al. Experimental study of dynamic characteristics of granite under impact loading[ J] . Egi neering Blasting, 2014( 1) : 14. 4 ꢀ Kꢀ y ( 1) \ SHPB QR=>, BCDEFPnoa cžrú;wxPŸꢀ¡+Ÿ¢£, ‡Ä¯º)Žq ( st+uꢀ MRS) · 5·
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