我國20世紀(ji)60年(nian)代(dai)(dai)利用斷裂力學對巖(yan)(yan)石損傷引起的(de)裂紋(wen)擴展進行(xing)過(guo)試驗研究,為(wei)聚(ju)能(neng)(neng)(neng)爆破技術(shu)應(ying)用到工(gong)程做(zuo)了不少理論(lun)分(fen)析,也取(qu)得(de)(de)一些(xie)進展。80年(nian)代(dai)(dai)中期(qi)開始進行(xing)應(ying)用研究,以(yi)北京礦(kuang)業(ye)學院為(wei)代(dai)(dai)表,著重研究了聚(ju)能(neng)(neng)(neng)藥(yao)包切(qie)割(ge)饑理和應(ying)用。1987年(nian)淮南礦(kuang)業(ye)學院取(qu)得(de)(de)“雙(shuang)面(mian)切(qie)割(ge)器”的(de)zhuanli,1995年(nian)又取(qu)得(de)(de)“大理石花崗(gang)巖(yan)(yan)切(qie)割(ge)技術(shu)應(ying)用”zhuanli。1991年(nian)中國水(shui)電七局曾試圖采用硬質紙加工(gong)聚(ju)能(neng)(neng)(neng)藥(yao)管成形(xing)聚(ju)能(neng)(neng)(neng)藥(yao)卷做(zuo)過(guo)聚(ju)能(neng)(neng)(neng)預裂爆破試驗研究,但終因(yin)當(dang)時的(de)技術(shu)及工(gong)藝水(shui)平的(de)限制無法用于正常(chang)施工(gong),但是(shi)他們開了橢(tuo)圓(yuan)雙(shuang)極線性聚(ju)能(neng)(neng)(neng)結構試驗的(de)先(xian)河。雙(shuang)聚(ju)能(neng)(neng)(neng)預裂與光面(mian)爆破綜合技術(shu)開創輪(lun)廓控制爆破新時代(dai)(dai)。
在(zai)鐵(tie)路(lu)(lu)、礦山(shan)(shan)、水(shui)(shui)庫等大(da)型工(gong)(gong)(gong)(gong)程(cheng)中,爆(bao)(bao)破(po)技術(shu)的(de)(de)作(zuo)(zuo)用(yong)(yong)(yong)很(hen)關鍵很(hen)重要(yao)。采礦修路(lu)(lu)的(de)(de)開山(shan)(shan)挖隧道,城市(shi)(shi)對舊(jiu)建筑(zhu)物的(de)(de)拆(chai)除,都會用(yong)(yong)(yong)到爆(bao)(bao)破(po)技術(shu)。隨著經濟的(de)(de)發(fa)展、工(gong)(gong)(gong)(gong)程(cheng)建設的(de)(de)增多(duo),爆(bao)(bao)破(po)引起(qi)了(le)人(ren)們更多(duo)的(de)(de)關注。爆(bao)(bao)破(po)聚能(neng)管作(zuo)(zuo)為一(yi)種科學(xue)技術(shu),應用(yong)(yong)(yong)很(hen)廣(guang),但(dan)在(zai)工(gong)(gong)(gong)(gong)程(cheng)上(shang)的(de)(de)應用(yong)(yong)(yong)無(wu)疑是重要(yao)、常見的(de)(de),采礦開山(shan)(shan),修鐵(tie)路(lu)(lu)、公路(lu)(lu)用(yong)(yong)(yong)鉆爆(bao)(bao)法來開掘隧道,水(shui)(shui)利(li)工(gong)(gong)(gong)(gong)程(cheng)上(shang)也用(yong)(yong)(yong)一(yi)些(xie),城市(shi)(shi)里(li)面也使用(yong)(yong)(yong)了(le),拆(chai)除樓房。利(li)用(yong)(yong)(yong)炸(zha)爆(bao)(bao)炸(zha)產生的(de)(de)巨大(da)能(neng)量破(po)壞某(mou)種物體的(de)(de)原結(jie)構(gou),這(zhe)(zhe)種"破(po)壞"效(xiao)果不(bu)是其他方法能(neng)代(dai)替的(de)(de),它雖然不(bu)是獨立完(wan)成一(yi)個工(gong)(gong)(gong)(gong)程(cheng),但(dan)卻是一(yi)個重要(yao)的(de)(de)工(gong)(gong)(gong)(gong)序,特別是石(shi)方開挖、礦山(shan)(shan)開采等工(gong)(gong)(gong)(gong)程(cheng)缺少了(le)這(zhe)(zhe)個工(gong)(gong)(gong)(gong)序還不(bu)行(xing)。中國目前有發(fa)達的(de)(de)鐵(tie)路(lu)(lu)和(he)公路(lu)(lu)交(jiao)通網,可(ke)以(yi)想(xiang)(xiang)象(xiang),當(dang)初在(zai)修這(zhe)(zhe)些(xie)路(lu)(lu)的(de)(de)時(shi)候會遇到許多(duo)高山(shan)(shan)峻嶺,一(yi)座大(da)山(shan)(shan)橫在(zai)兩地(di)之間,想(xiang)(xiang)要(yao)修路(lu)(lu),就必(bi)須讓這(zhe)(zhe)座山(shan)(shan)消失,這(zhe)(zhe)個時(shi)候聚能(neng)管爆(bao)(bao)破(po)就起(qi)到決定性(xing)作(zuo)(zuo)用(yong)(yong)(yong)了(le)。
我國(guo)于1983年制定了(le)《水工(gong)(gong)(gong)(gong)(gong)建筑(zhu)(zhu)物(wu)巖行基(ji)礎開(kai)挖(wa)工(gong)(gong)(gong)(gong)(gong)程施工(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)規(gui)范》(sD 121l一1983)。自此,在(zai)水利水電建設(she)(she)中預裂(lie)(lie)爆(bao)(bao)破(po)(po)(po)與光(guang)面(mian)爆(bao)(bao)破(po)(po)(po)已成為必須(xu)進行的(de)保(bao)護邊(bian)(bian)坡(po)(po)質(zhi)量(liang)的(de)爆(bao)(bao)破(po)(po)(po)開(kai)挖(wa)技(ji)(ji)(ji)術(shu)措施。此后(hou)在(zai)此基(ji)礎上(shang)修訂(ding)的(de)《水工(gong)(gong)(gong)(gong)(gong)建筑(zhu)(zhu)物(wu)巖石(shi)基(ji)礎開(kai)挖(wa)工(gong)(gong)(gong)(gong)(gong)程施工(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)規(gui)范》(SL 47一1994)以及在(zai)《水電水利爆(bao)(bao)破(po)(po)(po)工(gong)(gong)(gong)(gong)(gong)程施工(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)規(gui)范》(DL/T 5135—2001)和《水工(gong)(gong)(gong)(gong)(gong)建筑(zhu)(zhu)物(wu)巖石(shi)基(ji)礎開(kai)挖(wa)工(gong)(gong)(gong)(gong)(gong)程施工(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)規(gui)范》(DL/T 5389~2007)中預裂(lie)(lie)爆(bao)(bao)破(po)(po)(po)與光(guang)面(mian)爆(bao)(bao)破(po)(po)(po)均(jun)被編入(ru)并有(you)(you)所改進,DL/T 5135—2001正在(zai)修編為DL/T 5135—2012。鐵道(dao)部也不(bu)僅規(gui)定了(le)凡是Ⅲ級以上(shang)的(de)巖石(shi)邊(bian)(bian)坡(po)(po),設(she)(she)計邊(bian)(bian)坡(po)(po)坡(po)(po)度為1:0.1~1:0.75,在(zai)邊(bian)(bian)坡(po)(po)部位的(de)爆(bao)(bao)破(po)(po)(po)設(she)(she)計和施工(gong)(gong)(gong)(gong)(gong)都應(ying)采用光(guang)面(mian)爆(bao)(bao)破(po)(po)(po)或預裂(lie)(lie)爆(bao)(bao)破(po)(po)(po),并闡述了(le)光(guang)面(mian)(預裂(lie)(lie))爆(bao)(bao)破(po)(po)(po)施工(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)設(she)(she)計的(de)原則(ze)和參數(shu)、安全措施,而且還明確了(le)路塹邊(bian)(bian)坡(po)(po)光(guang)面(mian)(預裂(lie)(lie))爆(bao)(bao)破(po)(po)(po)項(xiang)目質(zhi)量(liang)驗收檢(jian)測(ce)數(shu)量(liang)和檢(jian)測(ce)方法。無疑該(gai)規(gui)程的(de)實施,有(you)(you)力地(di)推動和促(cu)進了(le)光(guang)面(mian)(預裂(lie)(lie))爆(bao)(bao)破(po)(po)(po)技(ji)(ji)(ji)術(shu)在(zai)鐵路建設(she)(she)中的(de)應(ying)用與發展。
光(guang)面(mian)爆(bao)(bao)(bao)破(po)技術優(you)(you)勢:相對于傳統爆(bao)(bao)(bao)破(po)工藝,聚能管(guan)光(guang)面(mian)爆(bao)(bao)(bao)破(po)比常規爆(bao)(bao)(bao)破(po)具有以下(xia)(xia)優(you)(you)勢∶少打眼,少裝藥(yao)(yao)。節(jie)約周邊(bian)鉆孔量(liang)(liang)50%,總鉆孔進尺(chi)減(jian)少30%;節(jie)約炸(zha)藥(yao)(yao)10~20%,雷(lei)(lei)管(guan)30%。節(jie)約噴(pen)漿料15-20%。節(jie)省時間(jian)∶每循環鉆孔、裝藥(yao)(yao)、噴(pen)漿時間(jian)1.5-2.0小時。在安全方面(mian)利(li)用水沙袋替代炮泥(ni),以避(bi)免搗(dao)炮泥(ni)損(sun)毀電雷(lei)(lei)管(guan)導(dao)線(xian),造成(cheng)瞎炮。大(da)(da)大(da)(da)減(jian)少對圍巖擾動(dong),光(guang)面(mian)效果好,巖性(xing)條件(jian)差情況(kuang)下(xia)(xia)可以大(da)(da)大(da)(da)減(jian)少超挖量(liang)(liang),控制(zhi)巷道成(cheng)型(xing);巖性(xing)完(wan)整無節(jie)理(li)情況(kuang)下(xia)(xia)眼痕率可以達到(dao)90%以上,巷道成(cheng)型(xing)好,穩定性(xing)強(qiang)。布(bu)孔方式優(you)(you)化成(cheng)多(duo)排掏槽(cao)布(bu)孔,單(dan)次掘進深度可以優(you)(you)化提高10%到(dao)15%不等。由于炮孔數量(liang)(liang)大(da)(da)大(da)(da)減(jian)少可以考慮一(yi)起全斷面(mian)起爆(bao)(bao)(bao),節(jie)省放炮時間(jian)。
佛山多向聚能管不成功的事例是有的,如爆而不倒、實施定向爆破后沒有按爆破方案的方向倒塌等等。這些事例警示:從爆破設計、爆破器材質量、爆破施工到起爆網路連接等,只要有一個環節出現失誤,都將影響爆破工程的效果,乃至造成嚴重的后果。多向聚能管價格爆(bao)破(po)(po)作(zuo)業無論(lun)是(shi)老(lao)舊建筑物(wu)本身(shen)還是(shi)周圍環境都(dou)十(shi)分(fen)復雜,這不僅要求認真調查爆(bao)破(po)(po)體的(de)(de)(de)結構(包括施工缺(que)陷),分(fen)析(xi)受(shou)力(li)狀況,同(tong)時(shi)(shi)還要對(dui)采取技術措施(如預處理、嵌補(bu)、支撐等)的(de)(de)(de)可(ke)(ke)靠和安全(quan)性進(jin)行分(fen)析(xi),對(dui)可(ke)(ke)能出現的(de)(de)(de)意外情況,應預先制定應急(ji)方案,努力(li)避免安全(quan)事(shi)故和不必要的(de)(de)(de)損失。工程(cheng)(cheng)的(de)(de)(de)環保(bao)性越(yue)來越(yue)受(shou)到人們的(de)(de)(de)關(guan)注,同(tong)時(shi)(shi),探索無公害的(de)(de)(de)拆除爆(bao)破(po)(po)技術,一直是(shi)爆(bao)破(po)(po)工作(zuo)者追求的(de)(de)(de)目標。設(she)立掩蔽體對(dui)物(wu)體加(jia)以保(bao)護(hu),簡單的(de)(de)(de)辦法是(shi)用草袋、竹笆一類材料覆蓋在需要保(bao)護(hu)的(de)(de)(de)物(wu)體上(shang)面(mian);對(dui)房屋和機器設(she)備常(chang)要在迎(ying)面(mian)和頂部(bu)豎立排架,用木(mu)板或(huo)荊笆上(shang)罩鐵絲網(wang),抵御較(jiao)多的(de)(de)(de)飛石和較(jiao)強的(de)(de)(de)空氣沖擊波(bo)的(de)(de)(de)打擊;對(dui)某些重要工程(cheng)(cheng)的(de)(de)(de)建筑物(wu)打防(fang)震孔或(huo)者用預裂爆(bao)破(po)(po)將爆(bao)破(po)(po)區和被保(bao)護(hu)的(de)(de)(de)建筑物(wu)或(huo)工程(cheng)(cheng)設(she)施隔離開來。