自然崩落法全英文二

CAVINGGEOMECHANICS

RButcherAIMSBasicknowledgeUnderstandingofissuesNoblackartCriticallyquestiontechnicalreportsReasonabletestProjectcontentWHY?RenewedinterestCavescompetewithdeeppitsBlackartLackofskillsSkillslosssincethelate1980’sSkillslossintheUSAContentsHistoryMiningengineeringaspectsCaving&stressesPittransitionissuesSLCBlockcavingRisksCAVINGHISTORYBlockcavingBlockcavingStarted1800’sPewabicmine(Michigan-USA)Ironoremine’s1900’sblockcavingUSACoppermines1920-30’sCanada&Zimbabwe1950’sSouthAfricanmines(Diamond)1990’sHardrocklowgradedepositsEa詞rl扣y鳥Bl卷oc鬼k齡ca課ve(P銅ee歪le們1隸94踐1)SU昌B餅LE銳VE斃L省CA碰VI達NGSu祥b燙le忍ve付l掌ca洽vi界ngTo詞p燒sl謀ic零in撲g,丸N投or連th需er呆n皆En尖gl漆is向h敬ir棗on慮s楚to稱ne皺m邪in星es19童13湯,艇Ut炮ah避g粥ol狂d孟mi龍ne恩s19侄20環(huán)-3俱0’照s抖,U迫S吃ir忙on靜o心re牌m貞in架es19完50陰’s妙L詳KA驕B/樹Sw糊ed駛en19科58商,Sh戰(zhàn)ab浴an吼ie/Z腿im費ba周bw示e19襪60努-8矮0’逝,筋w該or院ld遲wi恭de19覽80差-9丘0’娘s,她m貞et洋ho板d盼de姥cl隙in舊e厭(e灣xc維es鹿si緒ve鞠d旬il膝ut御io貼n俊)19避90夫’s旁,蓬A(yù)u舊st越ra謠li扣a逗(d淡il喬ut雙io樓n慣co霞nt噸ro掩l飛by頌d大ra孝w拾co姓nt都ro洋l)20款00辟’s俘,傾me知th少od創(chuàng)q嗓ue膜st酒io材ne廢d厚ag芝ai編nTO社P-祝SL喪IC刃IN永GTO核P地–S享LI谷CI潔NG尼(瓜Co節(jié)nt倘in撈ue士)Au得st幻玉ra穴li序aMa燒in黃ly源S友LC引’SNo全rt速h熄Pa濱rk瓦es雜(持BC嘴)Fr掏on堆t殲ca膏ve燙s/鄭Co肚re冤&茂S胖he蜘llSL敲OS使/眼Co頃re鉤&她s仆he嚇ll議c膽on平ve用rs把io寸n烘to軍S景LCAu對,鼠C舊u,肌N蓋i,卡P更ol哥y-儲me盞ta迎ll發(fā)ic1-炸4童M軟t/項yrHa旬rd移&融So噴ft蔑o心re輸b脊od粘ie夠sMa情in怪ly廟A貸fr索ic咸an墻d航es犯ig秤n裁ra虹ti蛛on所al不eAu臉st車ra勻li場an亂di脾ff閱er原en票ce嗽sSe脅is唯mi壤c呀ac飼ti崇vi疤tyHi災(zāi)gh徒er奏h帖or鋸iz輛on截ta腿l能st狡re季ss紛es批(苗st紫re伏ss這w要al戚l震so進on栗er任)Pr匙iv耍at登e狗ow框ne妙dDe擱cl禽in吩e稠ac懇ce惹ssSh海or斃t僵li研fe順o翻psLi干mi睡te濾d掠mi咱ni途ng已h儀is額to揭ryFI胡FOEn碎vi利ro枯nm駁en掉ta綁l/潔h智er怖it規(guī)ag由eSm烘al延le視r綁mi瘡ni棄ng蟻c個om向pa者ni傭es寧(尋di使ff河er舍en