的軍事(shi)應(ying)(ying)用(yong)(yong):聚能(neng)爆破(po)(po)技(ji)術,早在二次(ci)世界(jie)大戰(zhan)期間(jian)就(jiu)在軍事(shi)方面(mian)(mian)廣(guang)(guang)泛(fan)應(ying)(ying)用(yong)(yong)。國內在聚能(neng)破(po)(po)甲技(ji)術如大錐(zhui)角(jiao)反艦(jian)導(dao)彈戰(zhan)斗部和(he)大錐(zhui)角(jiao)反坦克地雷以(yi)及敏(min)感彈戰(zhan)斗部等方面(mian)(mian)取得了(le)較為快速的發展,我國20世紀60年代(dai)打破(po)(po)國外技(ji)術封鎖獨立(li)自主(zhu)研發成功原子(zi)彈就(jiu)是得力于聚能(neng)爆破(po)(po)技(ji)術轟擊核裝置而引爆原子(zi)彈。的民爆應(ying)(ying)用(yong)(yong)——切槽爆破(po)(po)技(ji)術:聚能(neng)爆破(po)(po)用(yong)(yong)于工程建(jian)設也是20世紀60年代(dai)開(kai)始的,首先是瑞典的U﹒Langefors提出孔(kong)壁切槽爆破(po)(po)利用(yong)(yong)槽口(kou)應(ying)(ying)力集中定向開(kai)裂的設想,后(hou)經W﹒L﹒Fourney驗證是有效的。70年代(dai)國外廣(guang)(guang)泛(fan)研究和(he)應(ying)(ying)用(yong)(yong)了(le)切槽爆破(po)(po)技(ji)術。
我國(guo)20世紀60年(nian)(nian)代利用(yong)斷裂力學對巖石(shi)損傷引起的裂紋(wen)擴展進行過試(shi)驗(yan)研究(jiu),為聚(ju)(ju)(ju)能爆破(po)(po)技術應用(yong)到工程做(zuo)了(le)不少(shao)理論分析,也取(qu)(qu)得一些進展。80年(nian)(nian)代中(zhong)期(qi)開始(shi)進行應用(yong)研究(jiu),以北京礦業學院為代表,著重研究(jiu)了(le)聚(ju)(ju)(ju)能藥(yao)(yao)包(bao)切割饑理和應用(yong)。1987年(nian)(nian)淮南礦業學院取(qu)(qu)得“雙面切割器”的zhuanli,1995年(nian)(nian)又取(qu)(qu)得“大理石(shi)花崗巖切割技術應用(yong)”zhuanli。1991年(nian)(nian)中(zhong)國(guo)水(shui)電(dian)七局曾試(shi)圖(tu)采用(yong)硬質紙加工聚(ju)(ju)(ju)能藥(yao)(yao)管(guan)成形聚(ju)(ju)(ju)能藥(yao)(yao)卷(juan)做(zuo)過聚(ju)(ju)(ju)能預(yu)裂爆破(po)(po)試(shi)驗(yan)研究(jiu),但(dan)終因當時的技術及工藝(yi)水(shui)平(ping)的限(xian)制無法用(yong)于正常(chang)施工,但(dan)是他們開了(le)橢圓雙極(ji)線性聚(ju)(ju)(ju)能結(jie)構試(shi)驗(yan)的先河。雙聚(ju)(ju)(ju)能預(yu)裂與光面爆破(po)(po)綜合技術開創輪廓(kuo)控制爆破(po)(po)新時代。
各(ge)種(zhong)爆(bao)(bao)(bao)破(po)(po)(po)(po)、爆(bao)(bao)(bao)破(po)(po)(po)(po)器材銷毀以及(ji)爆(bao)(bao)(bao)破(po)(po)(po)(po)器材意外爆(bao)(bao)(bao)炸時,爆(bao)(bao)(bao)破(po)(po)(po)(po)源與人(ren)員(yuan)(yuan)和其(qi)他(ta)保護(hu)對象之(zhi)間的(de)安(an)(an)全(quan)距(ju)離(li)(li)(li)(li)稱(cheng)為(wei)爆(bao)(bao)(bao)破(po)(po)(po)(po)安(an)(an)全(quan)距(ju)離(li)(li)(li)(li)。爆(bao)(bao)(bao)破(po)(po)(po)(po)安(an)(an)全(quan)距(ju)離(li)(li)(li)(li)應取各(ge)種(zhong)爆(bao)(bao)(bao)破(po)(po)(po)(po)效應(地(di)震(zhen)、沖擊波、飛(fei)石(shi)、有(you)毒氣體(ti)等)分別核定(ding)(ding)(ding)的(de)大值(zhi)。爆(bao)(bao)(bao)破(po)(po)(po)(po)時,必(bi)(bi)(bi)然(ran)產生(sheng)爆(bao)(bao)(bao)破(po)(po)(po)(po)地(di)震(zhen)、空氣沖擊波、碎(sui)石(shi)飛(fei)散及(ji)有(you)害氣體(ti),因此,爆(bao)(bao)(bao)破(po)(po)(po)(po)設計時必(bi)(bi)(bi)須確定(ding)(ding)(ding)爆(bao)(bao)(bao)破(po)(po)(po)(po)危害范圍,并確定(ding)(ding)(ding)爆(bao)(bao)(bao)點到附近(jin)人(ren)員(yuan)(yuan)、設備(bei)、建筑(zhu)物及(ji)井巷等的(de)安(an)(an)全(quan),這一(yi)段距(ju)離(li)(li)(li)(li)就稱(cheng)為(wei)爆(bao)(bao)(bao)破(po)(po)(po)(po)安(an)(an)全(quan)距(ju)離(li)(li)(li)(li)。如何控制好這段距(ju)離(li)(li)(li)(li)就顯的(de)尤(you)為(wei)重(zhong)要。為(wei)保證爆(bao)(bao)(bao)破(po)(po)(po)(po)安(an)(an)全(quan),爆(bao)(bao)(bao)破(po)(po)(po)(po)地(di)點與人(ren)員(yuan)(yuan)或其(qi)他(ta)應保護(hu)對象之(zhi)間必(bi)(bi)(bi)須保持短的(de)相隔長度(du)。爆(bao)(bao)(bao)破(po)(po)(po)(po)有(you)害效應隨距(ju)離(li)(li)(li)(li)的(de)增加有(you)規(gui)律地(di)衰減,用距(ju)離(li)(li)(li)(li)作為(wei)安(an)(an)全(quan)尺度(du)可限定(ding)(ding)(ding)爆(bao)(bao)(bao)破(po)(po)(po)(po)有(you)害效應在(zai)允許限度(du)之(zhi)內。中(zhong)國《爆(bao)(bao)(bao)破(po)(po)(po)(po)安(an)(an)全(quan)規(gui)程》規(gui)定(ding)(ding)(ding)了爆(bao)(bao)(bao)破(po)(po)(po)(po)地(di)震(zhen)安(an)(an)全(quan)距(ju)離(li)(li)(li)(li),個別飛(fei)散物安(an)(an)全(quan)距(ju)離(li)(li)(li)(li),以及(ji)爆(bao)(bao)(bao)炸沖擊波的(de)安(an)(an)全(quan)距(ju)離(li)(li)(li)(li)。
給大(da)家介紹下(xia)爆(bao)破(po)聚能(neng)(neng)管的(de)(de)技術原(yuan)理∶炸藥(yao)(yao)爆(bao)炸產(chan)(chan)生的(de)(de)爆(bao)轟波通過聚能(neng)(neng)管的(de)(de)聚能(neng)(neng)槽,將(jiang)炸藥(yao)(yao)的(de)(de)動(dong)能(neng)(neng)、勢能(neng)(neng)轉換成高壓(ya)、高速、高能(neng)(neng)的(de)(de)射(she)流(liu),切割演示(shi)成縫(feng)(feng)。射(she)流(liu)在孔壁產(chan)(chan)生射(she)流(liu)壓(ya)力達(da)7000MPa,巖(yan)石(shi)動(dong)載(zai)抗(kang)壓(ya)強度為(wei)200MPa,抗(kang)拉為(wei)1/8~1/10的(de)(de)抗(kang)壓(ya)強度,相鄰兩炮(pao)(pao)孔互為(wei)鄰空面,疊(die)加后的(de)(de)壓(ya)縮波變(bian)為(wei)稀疏波,在兩炮(pao)(pao)眼連線上使(shi)巖(yan)石(shi)結構斷裂(lie),形(xing)成裂(lie)紋。準靜態氣(qi)體(ti)膨(peng)脹(zhang),靜態壓(ya)力在兩炮(pao)(pao)孔最短連線兩側產(chan)(chan)生拉力使(shi)巖(yan)石(shi)裂(lie)縫(feng)(feng)進(jin)一步擴(kuo)展。根據爆(bao)破(po)應(ying)力集中氣(qi)刃(ren)作用原(yuan)則,爆(bao)破(po)氣(qi)體(ti)沿裂(lie)縫(feng)(feng)進(jin)一步擴(kuo)大(da)貫通,拋落巖(yan)石(shi)。
專用多向聚能管預裂與光面爆破技術的歷史與現狀:預裂爆破是沿設計開挖邊界布置密集炮孔,采取不耦合裝藥或裝填低威力炸藥,在主爆區之前起爆,從而在爆區與保留區之間形成預裂縫,以減弱主爆破對保留巖體的破壞并形成平整輪廓面的爆破作業。多向聚能管廠家光面(mian)(mian)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)是(shi)沿(yan)設(she)計(ji)開挖(wa)邊界布設(she)密(mi)集炮孔(kong),采用(yong)(yong)不(bu)耦合裝藥或(huo)裝填(tian)低威力炸藥,在(zai)主爆(bao)(bao)(bao)(bao)(bao)(bao)區爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)之(zhi)后起爆(bao)(bao)(bao)(bao)(bao)(bao)的(de)以形成平整的(de)開挖(wa)輪(lun)廓面(mian)(mian)的(de)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)作業。爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)技(ji)術的(de)發展(zhan)是(shi)先出(chu)現(xian)光面(mian)(mian)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po),然后衍生發展(zhan)為(wei)預裂(lie)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)。聚能管國內歷(li)史與現(xian)狀,我國于(yu)1964~1965年(nian)在(zai)湖北(bei)陸水水電(dian)站施工(gong)中(zhong)做過淺孔(kong)預裂(lie)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)試(shi)驗,1965年(nian)鐵(tie)道(dao)部門(men)在(zai)成昆鐵(tie)路(lu)建(jian)設(she)中(zhong)開始試(shi)驗光面(mian)(mian)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po),1977年(nian)在(zai)西延線張(zhang)家船工(gong)點,全長近200m的(de)2000m2路(lu)塹邊坡(po)全部采用(yong)(yong)光面(mian)(mian)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po),爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)后邊坡(po)平整穩定,殘留的(de)半(ban)孔(kong)清(qing)晰可見(jian),是(shi)鐵(tie)路(lu)建(jian)設(she)中(zhong)采用(yong)(yong)路(lu)塹光面(mian)(mian)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)。