我(wo)國(guo)20世紀60年(nian)(nian)代利用(yong)斷裂(lie)力學對巖石損傷引起的裂(lie)紋(wen)擴展進行(xing)過(guo)試(shi)驗研(yan)究,為(wei)聚(ju)能(neng)(neng)(neng)爆(bao)破技術(shu)應用(yong)到工程做了(le)(le)不少理論分析,也取(qu)得一些進展。80年(nian)(nian)代中(zhong)期(qi)開始進行(xing)應用(yong)研(yan)究,以北京(jing)礦業學院為(wei)代表,著重研(yan)究了(le)(le)聚(ju)能(neng)(neng)(neng)藥包切(qie)(qie)割(ge)饑理和應用(yong)。1987年(nian)(nian)淮南(nan)礦業學院取(qu)得“雙面切(qie)(qie)割(ge)器”的zhuanli,1995年(nian)(nian)又取(qu)得“大(da)理石花崗巖切(qie)(qie)割(ge)技術(shu)應用(yong)”zhuanli。1991年(nian)(nian)中(zhong)國(guo)水電(dian)七局曾試(shi)圖采(cai)用(yong)硬質紙加工聚(ju)能(neng)(neng)(neng)藥管成(cheng)形聚(ju)能(neng)(neng)(neng)藥卷做過(guo)聚(ju)能(neng)(neng)(neng)預(yu)裂(lie)爆(bao)破試(shi)驗研(yan)究,但(dan)終因當時的技術(shu)及工藝(yi)水平的限制(zhi)無(wu)法(fa)用(yong)于(yu)正常施工,但(dan)是他們(men)開了(le)(le)橢圓雙極線性聚(ju)能(neng)(neng)(neng)結構試(shi)驗的先河。雙聚(ju)能(neng)(neng)(neng)預(yu)裂(lie)與(yu)光面爆(bao)破綜合技術(shu)開創輪(lun)廓控制(zhi)爆(bao)破新時代。
預(yu)(yu)裂與光(guang)面爆(bao)破(po)(po)技(ji)術的(de)歷史(shi)與現狀:預(yu)(yu)裂爆(bao)破(po)(po)是沿設(she)計開挖邊(bian)(bian)界(jie)布(bu)置密集炮(pao)(pao)孔,采取不耦合(he)裝藥(yao)(yao)或(huo)裝填低(di)威力(li)炸(zha)藥(yao)(yao),在(zai)(zai)主(zhu)爆(bao)區(qu)(qu)之前(qian)起爆(bao),從而(er)在(zai)(zai)爆(bao)區(qu)(qu)與保留區(qu)(qu)之間形(xing)成預(yu)(yu)裂縫,以減弱(ruo)主(zhu)爆(bao)破(po)(po)對保留巖體的(de)破(po)(po)壞并形(xing)成平整(zheng)輪廓面的(de)爆(bao)破(po)(po)作業。光(guang)面爆(bao)破(po)(po)是沿設(she)計開挖邊(bian)(bian)界(jie)布(bu)設(she)密集炮(pao)(pao)孔,采用不耦合(he)裝藥(yao)(yao)或(huo)裝填低(di)威力(li)炸(zha)藥(yao)(yao),在(zai)(zai)主(zhu)爆(bao)區(qu)(qu)爆(bao)破(po)(po)之后(hou)起爆(bao)的(de)以形(xing)成平整(zheng)的(de)開挖輪廓面的(de)爆(bao)破(po)(po)作業。爆(bao)破(po)(po)技(ji)術的(de)發(fa)展是先出現光(guang)面爆(bao)破(po)(po),然后(hou)衍生發(fa)展為預(yu)(yu)裂爆(bao)破(po)(po)。聚能管國內歷史(shi)與現狀,我國于1964~1965年在(zai)(zai)湖北(bei)陸水水電站施工(gong)中(zhong)做過淺孔預(yu)(yu)裂爆(bao)破(po)(po)試(shi)驗,1965年鐵道(dao)部門(men)在(zai)(zai)成昆鐵路建設(she)中(zhong)開始試(shi)驗光(guang)面爆(bao)破(po)(po),1977年在(zai)(zai)西延線張家(jia)船工(gong)點,全長近(jin)200m的(de)2000m2路塹邊(bian)(bian)坡全部采用光(guang)面爆(bao)破(po)(po),爆(bao)破(po)(po)后(hou)邊(bian)(bian)坡平整(zheng)穩定,殘留的(de)半(ban)孔清晰可(ke)見,是鐵路建設(she)中(zhong)采用路塹光(guang)面爆(bao)破(po)(po)。
我國于(yu)1983年制定了(le)(le)《水(shui)(shui)工建筑物(wu)巖行(xing)基(ji)礎開(kai)(kai)挖(wa)(wa)(wa)工程(cheng)(cheng)施(shi)工技(ji)(ji)術(shu)規(gui)范(fan)》(sD 121l一(yi)(yi)1983)。自此,在(zai)水(shui)(shui)利水(shui)(shui)電建設(she)(she)中(zhong)預(yu)(yu)裂(lie)(lie)爆(bao)破(po)(po)(po)與(yu)光(guang)面(mian)(mian)爆(bao)破(po)(po)(po)已成為(wei)必(bi)須(xu)進行(xing)的(de)保護邊(bian)(bian)坡質(zhi)量的(de)爆(bao)破(po)(po)(po)開(kai)(kai)挖(wa)(wa)(wa)技(ji)(ji)術(shu)措(cuo)施(shi)。此后在(zai)此基(ji)礎上修訂的(de)《水(shui)(shui)工建筑物(wu)巖石基(ji)礎開(kai)(kai)挖(wa)(wa)(wa)工程(cheng)(cheng)施(shi)工技(ji)(ji)術(shu)規(gui)范(fan)》(SL 47一(yi)(yi)1994)以(yi)及在(zai)《水(shui)(shui)電水(shui)(shui)利爆(bao)破(po)(po)(po)工程(cheng)(cheng)施(shi)工技(ji)(ji)術(shu)規(gui)范(fan)》(DL/T 5135—2001)和(he)《水(shui)(shui)工建筑物(wu)巖石基(ji)礎開(kai)(kai)挖(wa)(wa)(wa)工程(cheng)(cheng)施(shi)工技(ji)(ji)術(shu)規(gui)范(fan)》(DL/T 5389~2007)中(zhong)預(yu)(yu)裂(lie)(lie)爆(bao)破(po)(po)(po)與(yu)光(guang)面(mian)(mian)爆(bao)破(po)(po)(po)均被編入并(bing)有所改(gai)進,DL/T 5135—2001正(zheng)在(zai)修編為(wei)DL/T 5135—2012。鐵(tie)(tie)道部也不僅(jin)規(gui)定了(le)(le)凡是(shi)Ⅲ級以(yi)上的(de)巖石邊(bian)(bian)坡,設(she)(she)計(ji)邊(bian)(bian)坡坡度(du)為(wei)1:0.1~1:0.75,在(zai)邊(bian)(bian)坡部位(wei)的(de)爆(bao)破(po)(po)(po)設(she)(she)計(ji)和(he)施(shi)工都應(ying)采用光(guang)面(mian)(mian)爆(bao)破(po)(po)(po)或預(yu)(yu)裂(lie)(lie)爆(bao)破(po)(po)(po),并(bing)闡述了(le)(le)光(guang)面(mian)(mian)(預(yu)(yu)裂(lie)(lie))爆(bao)破(po)(po)(po)施(shi)工技(ji)(ji)術(shu)設(she)(she)計(ji)的(de)原則和(he)參(can)數、安(an)全措(cuo)施(shi),而且(qie)還明(ming)確了(le)(le)路(lu)(lu)塹邊(bian)(bian)坡光(guang)面(mian)(mian)(預(yu)(yu)裂(lie)(lie))爆(bao)破(po)(po)(po)項(xiang)目質(zhi)量驗收檢測(ce)數量和(he)檢測(ce)方(fang)法(fa)。無疑該規(gui)程(cheng)(cheng)的(de)實(shi)施(shi),有力地推動和(he)促進了(le)(le)光(guang)面(mian)(mian)(預(yu)(yu)裂(lie)(lie))爆(bao)破(po)(po)(po)技(ji)(ji)術(shu)在(zai)鐵(tie)(tie)路(lu)(lu)建設(she)(she)中(zhong)的(de)應(ying)用與(yu)發展。
是由(you)管(guan)(guan)(guan)體(ti)(ti)、前(qian)錐形定(ding)(ding)(ding)格(ge)(ge)帽、后(hou)定(ding)(ding)(ding)格(ge)(ge)堵(du)構(gou)成,管(guan)(guan)(guan)體(ti)(ti)為塑性(xing)材(cai)料(liao)制成,呈(cheng)管(guan)(guan)(guan)狀(zhuang)(zhuang),管(guan)(guan)(guan)體(ti)(ti)外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing)小于(yu)正常炮(pao)眼(yan)內徑(jing)(jing)(jing)(jing),長度可隨爆(bao)破需要(yao)生產,管(guan)(guan)(guan)體(ti)(ti)兩(liang)端各有外(wai)(wai)(wai)螺紋(wen),兩(liang)端外(wai)(wai)(wai)螺紋(wen)間有一(yi)縱(zong)向切縫(feng),切縫(feng)間等(deng)距有加強筋,前(qian)錐形定(ding)(ding)(ding)格(ge)(ge)帽呈(cheng)傘(san)狀(zhuang)(zhuang),傘(san)形尖有一(yi)光孔,兩(liang)側(ce)直(zhi)壁(bi)內徑(jing)(jing)(jing)(jing)有螺紋(wen),與管(guan)(guan)(guan)體(ti)(ti)外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing)前(qian)端螺紋(wen)配合,帽體(ti)(ti)外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing)大(da)于(yu)管(guan)(guan)(guan)體(ti)(ti),后(hou)定(ding)(ding)(ding)格(ge)(ge)堵(du)為一(yi)封蓋(gai),外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing)直(zhi)徑(jing)(jing)(jing)(jing)大(da)于(yu)管(guan)(guan)(guan)體(ti)(ti)外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing),與前(qian)錐形定(ding)(ding)(ding)格(ge)(ge)帽外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing)一(yi)致(zhi)(zhi),后(hou)定(ding)(ding)(ding)格(ge)(ge)堵(du)內徑(jing)(jing)(jing)(jing)有螺紋(wen),與管(guan)(guan)(guan)體(ti)(ti)外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing)后(hou)端螺紋(wen)配合。可根(gen)據炮(pao)眼(yan)深度采用合適的聚(ju)能(neng)管(guan)(guan)(guan)管(guan)(guan)(guan)體(ti)(ti),不(bu)需其他工具幫助送入炮(pao)眼(yan),切縫(feng)方向準(zhun)確(que),兩(liang)端的前(qian)錐形定(ding)(ding)(ding)格(ge)(ge)帽和后(hou)定(ding)(ding)(ding)格(ge)(ge)堵(du)外(wai)(wai)(wai)徑(jing)(jing)(jing)(jing)與炮(pao)眼(yan)內徑(jing)(jing)(jing)(jing)一(yi)致(zhi)(zhi),保(bao)證聚(ju)能(neng)管(guan)(guan)(guan)管(guan)(guan)(guan)體(ti)(ti)同心,定(ding)(ding)(ding)向準(zhun)確(que)。且利(li)于(yu)工業化生產,作(zuo)業安(an)全
專業雙向爆破聚能管水壓光面爆破技術,是在水壓光面爆破技術基礎上發展起來的一項新技術,其掏槽眼、輔助眼裝藥結構和爆破方式與水壓光面爆破相同,但在周邊眼中安裝專用聚能管裝置替代常規爆破藥卷和傳爆線,利用聚能管產生的粒子射流動能、高壓爆破氣體應力及“氣楔”作用,形成平整圓順的開挖輪廓面,對控制超欠挖具有良好效果,有效提升了隧道施工質量、進度和經濟效益。浙江雙向爆破聚能管科學合理地(di)利用能(neng)(neng)(neng)(neng)源(yuan),提高能(neng)(neng)(neng)(neng)源(yuan)利用效(xiao)率(lv),對節能(neng)(neng)(neng)(neng)減排也十(shi)分重要。利用聚能(neng)(neng)(neng)(neng)管兩端(duan)的水平開出的聚能(neng)(neng)(neng)(neng)槽產生(sheng)的聚能(neng)(neng)(neng)(neng)射流效(xiao)應(ying)對巖石(shi)進(jin)行破碎。據專家測(ce)算(suan),由于聚能(neng)(neng)(neng)(neng)管兩端(duan)聚能(neng)(neng)(neng)(neng)槽產生(sheng)的聚能(neng)(neng)(neng)(neng)切割效(xiao)應(ying),其能(neng)(neng)(neng)(neng)效(xiao)比提升一(yi)個量級。
聚(ju)能(neng)(neng)包(bao)(bao)由炸、形(xing)(xing)罩(zhao)(zhao)、隔板、殼(ke)體(ti)、引(yin)信(xin)和(he)(he)支架等(deng)部分(fen)組成(cheng)(cheng),其(qi)作(zuo)用及(ji)對(dui)聚(ju)能(neng)(neng)包(bao)(bao)威力的(de)(de)(de)(de)影響分(fen)述如下。1.炸,炸是聚(ju)能(neng)(neng)管(guan)爆(bao)破的(de)(de)(de)(de)能(neng)(neng)源,炸的(de)(de)(de)(de)爆(bao)壓(ya)越(yue)大(da),聚(ju)能(neng)(neng)彈威力越(yue)大(da);為(wei)得(de)到高爆(bao)壓(ya),需(xu)高爆(bao)速、高密度的(de)(de)(de)(de)炸。常(chang)用炸有(you)梯(ti)恩梯(ti)、8321炸等(deng),裝(zhuang)方法有(you)熔(rong)鑄(zhu),塑裝(zhuang)和(he)(he)壓(ya)裝(zhuang)多(duo)種(zhong)(zhong)。2.型罩(zhao)(zhao),型罩(zhao)(zhao)的(de)(de)(de)(de)作(zuo)用是把炸的(de)(de)(de)(de)爆(bao)炸能(neng)(neng)轉化成(cheng)(cheng)罩(zhao)(zhao)體(ti)材(cai)料的(de)(de)(de)(de)射流動能(neng)(neng),從(cong)而提高其(qi)穿(chuan)透(tou)和(he)(he)切(qie)割能(neng)(neng)力。型罩(zhao)(zhao)的(de)(de)(de)(de)材(cai)料必須(xu)滿足四點要求,即可壓(ya)縮(suo)性(xing)(xing)小、密度高、塑性(xing)(xing)和(he)(he)延(yan)展性(xing)(xing)好(hao),在形(xing)(xing)成(cheng)(cheng)射流中(zhong)不汽化。大(da)量試驗證明(ming),用紫銅(tong)制作(zuo)型罩(zhao)(zhao)效果好(hao),其(qi)次為(wei)鑄(zhu)鐵、鋼和(he)(he)陶瓷。型罩(zhao)(zhao)的(de)(de)(de)(de)形(xing)(xing)狀多(duo)種(zhong)(zhong)多(duo)樣(yang),主要有(you)軸(zhou)(zhou)對(dui)稱(cheng)(cheng)(cheng)型,如圓錐形(xing)(xing)、半(ban)球(qiu)形(xing)(xing)、拋物線形(xing)(xing)和(he)(he)喇叭形(xing)(xing)等(deng);面對(dui)稱(cheng)(cheng)(cheng)型,常(chang)見的(de)(de)(de)(de)有(you)用于切(qie)割屬板材(cai)的(de)(de)(de)(de)直線形(xing)(xing)和(he)(he)用于切(qie)割管(guan)材(cai)的(de)(de)(de)(de)環形(xing)(xing)聚(ju)能(neng)(neng)罩(zhao)(zhao)兩(liang)種(zhong)(zhong);中(zhong)心對(dui)稱(cheng)(cheng)(cheng)型,這種(zhong)(zhong)球(qiu)形(xing)(xing)聚(ju)能(neng)(neng)包(bao)(bao),中(zhong)心有(you)球(qiu)形(xing)(xing)空(kong)腔和(he)(he)球(qiu)形(xing)(xing)罩(zhao)(zhao),球(qiu)形(xing)(xing)罩(zhao)(zhao)外敷(fu)設(she)炸,若能(neng)(neng)在瞬間同時起爆(bao),可在空(kong)腔中(zhong)心點獲得(de)極大(da)的(de)(de)(de)(de)能(neng)(neng)量集中(zhong)。在工程中(zhong)常(chang)用的(de)(de)(de)(de)是軸(zhou)(zhou)對(dui)稱(cheng)(cheng)(cheng)型和(he)(he)面對(dui)稱(cheng)(cheng)(cheng)型兩(liang)類型罩(zhao)(zhao)。