預(yu)裂與光(guang)面(mian)(mian)爆(bao)(bao)(bao)(bao)破技術的(de)歷史與現狀:預(yu)裂爆(bao)(bao)(bao)(bao)破是沿設(she)計開(kai)挖(wa)(wa)(wa)邊界(jie)布(bu)置密(mi)集(ji)炮(pao)(pao)孔(kong),采取不耦合裝(zhuang)藥(yao)或(huo)裝(zhuang)填低威(wei)力(li)炸(zha)藥(yao),在(zai)主爆(bao)(bao)(bao)(bao)區(qu)之(zhi)前起爆(bao)(bao)(bao)(bao),從(cong)而在(zai)爆(bao)(bao)(bao)(bao)區(qu)與保留(liu)區(qu)之(zhi)間(jian)形成預(yu)裂縫,以減(jian)弱主爆(bao)(bao)(bao)(bao)破對保留(liu)巖(yan)體(ti)的(de)破壞并(bing)形成平整(zheng)輪(lun)廓面(mian)(mian)的(de)爆(bao)(bao)(bao)(bao)破作業(ye)。光(guang)面(mian)(mian)爆(bao)(bao)(bao)(bao)破是沿設(she)計開(kai)挖(wa)(wa)(wa)邊界(jie)布(bu)設(she)密(mi)集(ji)炮(pao)(pao)孔(kong),采用不耦合裝(zhuang)藥(yao)或(huo)裝(zhuang)填低威(wei)力(li)炸(zha)藥(yao),在(zai)主爆(bao)(bao)(bao)(bao)區(qu)爆(bao)(bao)(bao)(bao)破之(zhi)后起爆(bao)(bao)(bao)(bao)的(de)以形成平整(zheng)的(de)開(kai)挖(wa)(wa)(wa)輪(lun)廓面(mian)(mian)的(de)爆(bao)(bao)(bao)(bao)破作業(ye)。爆(bao)(bao)(bao)(bao)破技術的(de)發(fa)(fa)展是先出現光(guang)面(mian)(mian)爆(bao)(bao)(bao)(bao)破,然后衍(yan)生發(fa)(fa)展為預(yu)裂爆(bao)(bao)(bao)(bao)破。聚(ju)能(neng)管國內歷史與現狀,我國于1964~1965年(nian)在(zai)湖北陸水水電(dian)站(zhan)施工中(zhong)做過淺孔(kong)預(yu)裂爆(bao)(bao)(bao)(bao)破試驗,1965年(nian)鐵(tie)道部門在(zai)成昆(kun)鐵(tie)路(lu)建設(she)中(zhong)開(kai)始試驗光(guang)面(mian)(mian)爆(bao)(bao)(bao)(bao)破,1977年(nian)在(zai)西延線張家船工點(dian),全長(chang)近200m的(de)2000m2路(lu)塹邊坡全部采用光(guang)面(mian)(mian)爆(bao)(bao)(bao)(bao)破,爆(bao)(bao)(bao)(bao)破后邊坡平整(zheng)穩(wen)定(ding),殘(can)留(liu)的(de)半孔(kong)清晰可見,是鐵(tie)路(lu)建設(she)中(zhong)采用路(lu)塹光(guang)面(mian)(mian)爆(bao)(bao)(bao)(bao)破。
火索起爆法,導火索起爆法是利用導火索傳遞火焰點燃火雷管進而起爆炸藥。這種起爆法所需的材料有:導火索、火雷管和點火材料。專業深孔爆破聚能管導火索起爆法操作簡單、靈活,使用方便,成本較低,廣泛應用于小型爆破和掘進。由于導火索的速燃、緩燃等弊病,在爆破中事故所占比重最大。不能多處裝藥同時起爆。導爆索起爆法,深孔爆破聚能管價格用(yong)(yong)(yong)導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo)直接起(qi)爆(bao)(bao)(bao)(bao)炸(zha)(zha)藥(yao)包的(de)方法叫導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo)起(qi)爆(bao)(bao)(bao)(bao)法。先(xian)用(yong)(yong)(yong)雷管(guan)起(qi)爆(bao)(bao)(bao)(bao)導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo),當(dang)導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo)的(de)爆(bao)(bao)(bao)(bao)轟波傳至炸(zha)(zha)藥(yao)包時(shi)(shi),將(jiang)炸(zha)(zha)藥(yao)引爆(bao)(bao)(bao)(bao)。在需要(yao)延(yan)時(shi)(shi)分段起(qi)爆(bao)(bao)(bao)(bao)的(de)地方,將(jiang)導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo)中接入繼爆(bao)(bao)(bao)(bao)管(guan),就(jiu)能達到導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo)毫秒(miao)爆(bao)(bao)(bao)(bao)破(po)的(de)目的(de)。這種(zhong)爆(bao)(bao)(bao)(bao)破(po)法所需起(qi)爆(bao)(bao)(bao)(bao)材料有:雷管(guan)、導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo)和(he)(he)繼爆(bao)(bao)(bao)(bao)管(guan)等。導(dao)(dao)(dao)爆(bao)(bao)(bao)(bao)索(suo)(suo)起(qi)爆(bao)(bao)(bao)(bao)網路常用(yong)(yong)(yong)的(de)有:串聯、簇(cu)并(bing)(bing)聯、單(dan)向分段并(bing)(bing)聯和(he)(he)雙向分段并(bing)(bing)聯等。
采用一種抗靜電阻燃的(de)特(te)種塑料(liao)管(guan)、異形雙(shuang)槽聚能(neng)管(guan),根據炮眼(yan)深度可(ke)長可(ke)短。是(shi)兩個相似半(ban)壁(bi)管(guan)組成(cheng)(cheng)(cheng),半(ban)壁(bi)管(guan)中央有(you)個凹進(jin)去的(de)槽叫做(zuo)'聚能(neng)槽",使用聚能(neng)管(guan)光(guang)面爆(bao)(bao)(bao)破(po)成(cheng)(cheng)(cheng)型效果(guo)好,開挖輪廓線平順(shun)整(zheng)齊,圍巖擾(rao)動(dong)減(jian)少(shao)、超欠挖明(ming)顯改善,有(you)利于支護工(gong)(gong)序施工(gong)(gong),同時(shi)混凝土回填成(cheng)(cheng)(cheng)本(ben)大(da)(da)為降(jiang)低。鑿孔(kong)率(lv)減(jian)少(shao)30%,大(da)(da)大(da)(da)降(jiang)低了(le)(le)(le)爆(bao)(bao)(bao)破(po)作業工(gong)(gong)班的(de)勞動(dong)量(liang):鉆孔(kong)縮短30分鐘、少(shao)打(da)眼(yan)、出渣量(liang)減(jian)少(shao),降(jiang)低了(le)(le)(le)材料(liao)成(cheng)(cheng)(cheng)本(ben)、減(jian)少(shao)工(gong)(gong)時(shi)消耗、勞動(dong)效率(lv)明(ming)顯提高,周邊眼(yan)爆(bao)(bao)(bao)破(po)成(cheng)(cheng)(cheng)本(ben)降(jiang)低30%以上,半(ban)眼(yan)痕保(bao)留率(lv)高達(da)85%以上。pvc爆(bao)(bao)(bao)破(po)聚能(neng)管(guan)主要(yao)應用于隧道、煤礦(kuang)、鐵礦(kuang)等需(xu)要(yao)進(jin)行(xing)光(guang)面爆(bao)(bao)(bao)破(po)施工(gong)(gong)的(de)工(gong)(gong)程(cheng)。采用聚能(neng)管(guan)的(de)光(guang)面爆(bao)(bao)(bao)破(po)可(ke)減(jian)少(shao)鉆孔(kong),擴大(da)(da)孔(kong)距,減(jian)少(shao)導爆(bao)(bao)(bao)管(guan)用量(liang),減(jian)少(shao)超挖,減(jian)少(shao)噴漿(jiang),提高半(ban)孔(kong)率(lv),既(ji)節省了(le)(le)(le)成(cheng)(cheng)(cheng)本(ben)又提高了(le)(le)(le)施工(gong)(gong)效率(lv)。
我國20世紀(ji)60年(nian)(nian)代利用(yong)斷裂(lie)力(li)學對巖(yan)石(shi)損傷引起(qi)的(de)裂(lie)紋擴展(zhan)進(jin)行(xing)過(guo)(guo)試驗(yan)(yan)研究(jiu),為聚能(neng)(neng)爆破技(ji)術(shu)(shu)應(ying)(ying)用(yong)到(dao)工程做(zuo)了(le)不少理(li)(li)論分(fen)析(xi),也取(qu)(qu)得一(yi)些進(jin)展(zhan)。80年(nian)(nian)代中期開始進(jin)行(xing)應(ying)(ying)用(yong)研究(jiu),以北京礦(kuang)業(ye)學院為代表,著(zhu)重研究(jiu)了(le)聚能(neng)(neng)藥(yao)包切(qie)割饑(ji)理(li)(li)和應(ying)(ying)用(yong)。1987年(nian)(nian)淮南礦(kuang)業(ye)學院取(qu)(qu)得“雙面(mian)切(qie)割器”的(de)zhuanli,1995年(nian)(nian)又取(qu)(qu)得“大理(li)(li)石(shi)花崗巖(yan)切(qie)割技(ji)術(shu)(shu)應(ying)(ying)用(yong)”zhuanli。1991年(nian)(nian)中國水電七局曾試圖采(cai)用(yong)硬(ying)質紙(zhi)加工聚能(neng)(neng)藥(yao)管成形(xing)聚能(neng)(neng)藥(yao)卷做(zuo)過(guo)(guo)聚能(neng)(neng)預裂(lie)爆破試驗(yan)(yan)研究(jiu),但(dan)終因當時(shi)的(de)技(ji)術(shu)(shu)及工藝水平的(de)限制無(wu)法(fa)用(yong)于正常施工,但(dan)是他們(men)開了(le)橢圓雙極(ji)線性聚能(neng)(neng)結構試驗(yan)(yan)的(de)先河。雙聚能(neng)(neng)預裂(lie)與光(guang)面(mian)爆破綜合(he)技(ji)術(shu)(shu)開創輪(lun)廓(kuo)控制爆破新時(shi)代。
水(shui)壓(ya)爆(bao)破(po)是在(zai)炮(pao)孔(kong)(kong)兩(liang)(liang)端填充水(shui)袋,中間裝上乳化炸,炮(pao)孔(kong)(kong)再用(yong)(yong)(yong)(yong)炮(pao)泥封死(si),炮(pao)孔(kong)(kong)間距很大,兩(liang)(liang)個(ge)炮(pao)空之間相距了一米左右,是常規(gui)爆(bao)破(po)的(de)(de)(de)(de)炮(pao)孔(kong)(kong)間距的(de)(de)(de)(de)兩(liang)(liang)倍,這樣可以(yi)節省炮(pao)孔(kong)(kong)材料,這兩(liang)(liang)個(ge)凹(ao)槽又(you)稱為聚(ju)能槽,聚(ju)能槽非常重要,放置的(de)(de)(de)(de)位置和方(fang)向都十(shi)分(fen)講(jiang)究(jiu),一點也不能出(chu)錯,在(zai)爆(bao)破(po)的(de)(de)(de)(de)瞬間,高溫(wen)高壓(ya)聚(ju)能射流立即往凹(ao)槽兩(liang)(liang)邊的(de)(de)(de)(de)巖石進行切割,巖石如同豆腐一樣輕(qing)松被切割切割出(chu)來(lai)的(de)(de)(de)(de)輪廓線十(shi)分(fen)平順,效果極好(hao),聚(ju)能水(shui)壓(ya)爆(bao)破(po)中的(de)(de)(de)(de)水(shui)袋沒有降(jiang)低爆(bao)破(po)的(de)(de)(de)(de)效果,反而能保護隧(sui)道周邊植(zhi)被,減少地質擾動(dong),降(jiang)低煙塵(chen),重要的(de)(de)(de)(de)是節省炸成(cheng)本(ben),在(zai)未(wei)來(lai)這項技術會廣泛應用(yong)(yong)(yong)(yong)于工(gong)程中,降(jiang)低施工(gong)成(cheng)本(ben)。爆(bao)破(po)聚(ju)能管水(shui)壓(ya)光面(mian)爆(bao)破(po)較水(shui)壓(ya)光面(mian)爆(bao)破(po),在(zai)周邊眼單(dan)循環火工(gong)品使用(yong)(yong)(yong)(yong)量(liang)上節約(yue)(yue)費用(yong)(yong)(yong)(yong)8.3%,周邊眼鉆孔(kong)(kong)數量(liang)從39個(ge)下降(jiang)為23個(ge)費用(yong)(yong)(yong)(yong)節約(yue)(yue)41%,混凝土噴射每延米節約(yue)(yue)1.37立方(fang)米。