在工程爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)中,常(chang)用的(de)(de)(de)(de)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)方(fang)法(fa)(fa)(fa)有(you):電(dian)(dian)力(li)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)法(fa)(fa)(fa)、導(dao)火索起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)法(fa)(fa)(fa)、導(dao)爆(bao)(bao)(bao)(bao)(bao)(bao)索起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)法(fa)(fa)(fa)、導(dao)爆(bao)(bao)(bao)(bao)(bao)(bao)管(guan)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)法(fa)(fa)(fa)。電(dian)(dian)力(li)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)法(fa)(fa)(fa)是(shi)利用電(dian)(dian)能(neng)使雷(lei)(lei)管(guan)爆(bao)(bao)(bao)(bao)(bao)(bao)炸,進而起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)炸藥的(de)(de)(de)(de)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)芳法(fa)(fa)(fa)。它所需的(de)(de)(de)(de)器材有(you):電(dian)(dian)雷(lei)(lei)管(guan)、導(dao)線和(he)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)電(dian)(dian)源(yuan)。電(dian)(dian)爆(bao)(bao)(bao)(bao)(bao)(bao)網路的(de)(de)(de)(de)連接形式,要根據(ju)爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)方(fang)法(fa)(fa)(fa)、爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)規模、工程的(de)(de)(de)(de)重(zhong)要性、所選起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)電(dian)(dian)源(yuan)及其起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)能(neng)力(li)等(deng)進行選擇,基本連接方(fang)式有(you):串聯(lian)、并聯(lian)、串并聯(lian)和(he)并串聯(lian)等(deng)。電(dian)(dian)力(li)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)法(fa)(fa)(fa)具有(you)較(jiao)安全、可靠、準確、高效等(deng)優點,在國(guo)內外仍(reng)占(zhan)有(you)較(jiao)大比重(zhong)。在大、中型爆(bao)(bao)(bao)(bao)(bao)(bao)破(po)中,主要仍(reng)是(shi)用電(dian)(dian)力(li)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)。特別(bie)是(shi)在有(you)瓦斯、礦塵爆(bao)(bao)(bao)(bao)(bao)(bao)炸的(de)(de)(de)(de)環境(jing)中,電(dian)(dian)力(li)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)是(shi)主要的(de)(de)(de)(de)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)方(fang)法(fa)(fa)(fa)。但電(dian)(dian)力(li)起(qi)(qi)爆(bao)(bao)(bao)(bao)(bao)(bao)容易(yi)受各(ge)種電(dian)(dian)信(xin)號的(de)(de)(de)(de)干(gan)擾而發生(sheng)早爆(bao)(bao)(bao)(bao)(bao)(bao),因此在有(you)雜散電(dian)(dian)、靜(jing)電(dian)(dian)、雷(lei)(lei)電(dian)(dian)、射(she)頻電(dian)(dian)、高壓感應(ying)電(dian)(dian)的(de)(de)(de)(de)環境(jing)中,不能(neng)使用普通電(dian)(dian)雷(lei)(lei)管(guan)。
不(bu)成功的(de)(de)(de)事(shi)例(li)(li)是(shi)(shi)有的(de)(de)(de),如(ru)爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)而不(bu)倒、實(shi)施(shi)(shi)定向爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)后(hou)沒有按爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)方案(an)的(de)(de)(de)方向倒塌等(deng)(deng)等(deng)(deng)。這些(xie)事(shi)例(li)(li)警示(shi):從爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)設計、爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)器(qi)(qi)材質量(liang)、爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)施(shi)(shi)工到起爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)網路連接等(deng)(deng),只要(yao)(yao)有一個環(huan)節出(chu)現失(shi)誤,都(dou)將影響爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)工程的(de)(de)(de)效果,乃至造成嚴重的(de)(de)(de)后(hou)果。爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)作(zuo)業無(wu)論是(shi)(shi)老舊建筑物(wu)本身(shen)還是(shi)(shi)周(zhou)圍環(huan)境都(dou)十分復(fu)雜,這不(bu)僅要(yao)(yao)求(qiu)認真調查爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)體(ti)的(de)(de)(de)結構(包括施(shi)(shi)工缺(que)陷),分析(xi)受力狀(zhuang)況,同時還要(yao)(yao)對采取技術(shu)措施(shi)(shi)(如(ru)預處(chu)理、嵌補、支撐等(deng)(deng))的(de)(de)(de)可(ke)靠和安全性進行(xing)分析(xi),對可(ke)能出(chu)現的(de)(de)(de)意外情況,應預先制定應急方案(an),努(nu)力避(bi)免安全事(shi)故和不(bu)必要(yao)(yao)的(de)(de)(de)損失(shi)。工程的(de)(de)(de)環(huan)保(bao)性越(yue)(yue)來(lai)越(yue)(yue)受到人們的(de)(de)(de)關(guan)注,同時,探索無(wu)公害(hai)的(de)(de)(de)拆除爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)技術(shu),一直是(shi)(shi)爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)工作(zuo)者追求(qiu)的(de)(de)(de)目標。設立(li)掩蔽體(ti)對物(wu)體(ti)加以保(bao)護(hu),簡單的(de)(de)(de)辦法是(shi)(shi)用草袋、竹(zhu)笆(ba)一類材料覆蓋在需要(yao)(yao)保(bao)護(hu)的(de)(de)(de)物(wu)體(ti)上面(mian);對房屋和機(ji)器(qi)(qi)設備(bei)常要(yao)(yao)在迎面(mian)和頂部豎立(li)排架,用木板或(huo)荊(jing)笆(ba)上罩鐵絲網,抵御較多的(de)(de)(de)飛石和較強的(de)(de)(de)空氣沖(chong)擊波的(de)(de)(de)打擊;對某些(xie)重要(yao)(yao)工程的(de)(de)(de)建筑物(wu)打防震(zhen)孔或(huo)者用預裂爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)將爆(bao)(bao)(bao)(bao)(bao)(bao)(bao)破(po)(po)區和被保(bao)護(hu)的(de)(de)(de)建筑物(wu)或(huo)工程設施(shi)(shi)隔離開來(lai)。
水(shui)壓光(guang)面爆(bao)破技術(shu)(shu)(shu)在隧(sui)道(dao)掘進(jin)(jin)(jin)作(zuo)業中的(de)(de)實際應用(yong)。提(ti)升光(guang)面爆(bao)破水(shui)平(ping)、嚴抓隧(sui)道(dao)超挖管控進(jin)(jin)(jin)行了介紹。聚(ju)能水(shui)壓光(guang)面爆(bao)破工(gong)藝(yi)技術(shu)(shu)(shu)很(hen)成熟、可操作(zuo)性很(hen)強、材料成本(ben)很(hen)低、施(shi)工(gong)速度(du)(du)很(hen)快、節能環保(bao)效(xiao)果很(hen)顯著、經濟效(xiao)益社會效(xiao)益很(hen)高。一是(shi)要(yao)(yao)(yao)提(ti)高對(dui)推廣(guang)該項技術(shu)(shu)(shu)重要(yao)(yao)(yao)性和必然性的(de)(de)認(ren)識;二是(shi)要(yao)(yao)(yao)樹立(li)必須采取聚(ju)能水(shui)壓光(guang)面爆(bao)破的(de)(de)意識;三(san)是(shi)要(yao)(yao)(yao)堅持(chi)培(pei)訓、示(shi)范、監(jian)督“三(san)位(wei)一體”;四是(shi)要(yao)(yao)(yao)制定切實的(de)(de)獎(jiang)懲制度(du)(du);五(wu)是(shi)要(yao)(yao)(yao)建(jian)(jian)立(li)檢查監(jian)督機制,持(chi)續促(cu)進(jin)(jin)(jin)該項技術(shu)(shu)(shu)的(de)(de)深入推廣(guang)。在隧(sui)道(dao)施(shi)工(gong)的(de)(de)現場管理、科技創(chuang)新、人才培(pei)養(yang)、經濟效(xiao)益等方面的(de)(de)不足(zu)。建(jian)(jian)議對(dui)施(shi)工(gong)一線基礎技術(shu)(shu)(shu)工(gong)作(zuo)扎實推進(jin)(jin)(jin);對(dui)新工(gong)藝(yi)、先進(jin)(jin)(jin)工(gong)法要(yao)(yao)(yao)深入學習(xi)鉆研;對(dui)消極懈怠、故步(bu)自(zi)封的(de)(de)思想要(yao)(yao)(yao)堅決抵制。
專用深孔爆破多向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。信陽深孔爆破多向聚能管科學合理地利(li)用(yong)能(neng)源,提高能(neng)源利(li)用(yong)效(xiao)率,對節能(neng)減排(pai)也十分重要。利(li)用(yong)聚(ju)(ju)能(neng)管兩(liang)端(duan)的(de)(de)水平開(kai)出的(de)(de)聚(ju)(ju)能(neng)槽產生的(de)(de)聚(ju)(ju)能(neng)射(she)流效(xiao)應(ying)對巖石進行破碎(sui)。據專家測(ce)算,由于(yu)聚(ju)(ju)能(neng)管兩(liang)端(duan)聚(ju)(ju)能(neng)槽產生的(de)(de)聚(ju)(ju)能(neng)切(qie)割效(xiao)應(ying),其能(neng)效(xiao)比提升一個量級。
采用(yong)一種抗靜電阻燃的(de)(de)特種塑(su)料管(guan)(guan)、異(yi)形雙槽聚(ju)能管(guan)(guan),根據炮眼(yan)深度可(ke)長可(ke)短。是兩個相似(si)半(ban)壁(bi)管(guan)(guan)組成(cheng)(cheng),半(ban)壁(bi)管(guan)(guan)中央有個凹(ao)進去的(de)(de)槽叫做'聚(ju)能槽",使用(yong)聚(ju)能管(guan)(guan)光(guang)面爆(bao)(bao)(bao)破(po)成(cheng)(cheng)型效果好,開(kai)挖(wa)輪廓線平順(shun)整齊,圍(wei)巖擾動(dong)減(jian)(jian)(jian)少(shao)、超(chao)欠挖(wa)明(ming)顯改善(shan),有利于(yu)支護工(gong)(gong)序施(shi)(shi)工(gong)(gong),同時(shi)混凝土回填成(cheng)(cheng)本大(da)(da)為降(jiang)低(di)。鑿孔率(lv)減(jian)(jian)(jian)少(shao)30%,大(da)(da)大(da)(da)降(jiang)低(di)了爆(bao)(bao)(bao)破(po)作業工(gong)(gong)班的(de)(de)勞動(dong)量:鉆孔縮短30分鐘(zhong)、少(shao)打眼(yan)、出渣量減(jian)(jian)(jian)少(shao),降(jiang)低(di)了材料成(cheng)(cheng)本、減(jian)(jian)(jian)少(shao)工(gong)(gong)時(shi)消耗、勞動(dong)效率(lv)明(ming)顯提(ti)高(gao),周(zhou)邊眼(yan)爆(bao)(bao)(bao)破(po)成(cheng)(cheng)本降(jiang)低(di)30%以上,半(ban)眼(yan)痕保留率(lv)高(gao)達(da)85%以上。pvc爆(bao)(bao)(bao)破(po)聚(ju)能管(guan)(guan)主要應用(yong)于(yu)隧(sui)道、煤礦、鐵礦等(deng)需要進行光(guang)面爆(bao)(bao)(bao)破(po)施(shi)(shi)工(gong)(gong)的(de)(de)工(gong)(gong)程。采用(yong)聚(ju)能管(guan)(guan)的(de)(de)光(guang)面爆(bao)(bao)(bao)破(po)可(ke)減(jian)(jian)(jian)少(shao)鉆孔,擴大(da)(da)孔距,減(jian)(jian)(jian)少(shao)導爆(bao)(bao)(bao)管(guan)(guan)用(yong)量,減(jian)(jian)(jian)少(shao)超(chao)挖(wa),減(jian)(jian)(jian)少(shao)噴(pen)漿,提(ti)高(gao)半(ban)孔率(lv),既節省(sheng)了成(cheng)(cheng)本又(you)提(ti)高(gao)了施(shi)(shi)工(gong)(gong)效率(lv)。
水(shui)(shui)壓(ya)(ya)(ya)光面爆(bao)(bao)破(po)(po)技(ji)術(shu)基礎(chu)上(shang)發(fa)展起來的(de)一項(xiang)新技(ji)術(shu),其(qi)掏槽眼、輔助眼裝藥結構和爆(bao)(bao)破(po)(po)方(fang)式與水(shui)(shui)壓(ya)(ya)(ya)光面爆(bao)(bao)破(po)(po)相同,但在周邊眼中安裝專用(yong)(yong)線性(xing)聚(ju)(ju)能(neng)藥管(guan)替代常規爆(bao)(bao)破(po)(po)藥卷(juan)和傳(chuan)爆(bao)(bao)線,利(li)用(yong)(yong)線性(xing)聚(ju)(ju)能(neng)藥管(guan)產生的(de)粒(li)子射流動能(neng)、高壓(ya)(ya)(ya)爆(bao)(bao)破(po)(po)氣體應力(li)及“氣楔”作用(yong)(yong),形(xing)成平整圓順的(de)開挖輪(lun)廓(kuo)面,對控制超欠挖具有(you)(you)良好效果,有(you)(you)效提升了隧(sui)道(dao)施工質量(liang)、進度和經濟效益。水(shui)(shui)壓(ya)(ya)(ya)光面爆(bao)(bao)破(po)(po)較水(shui)(shui)壓(ya)(ya)(ya)光面爆(bao)(bao)破(po)(po),在周邊眼單循環(huan)火工品(pin)使(shi)用(yong)(yong)量(liang)上(shang)節約費用(yong)(yong)8.3%,周邊眼鉆孔數量(liang)從39個下降(jiang)為23個費用(yong)(yong)節約41%,混凝土噴(pen)射每(mei)延(yan)米(mi)節約1.37立方(fang)米(mi)。聚(ju)(ju)能(neng)水(shui)(shui)壓(ya)(ya)(ya)光面爆(bao)(bao)破(po)(po)比(bi)水(shui)(shui)壓(ya)(ya)(ya)光面爆(bao)(bao)破(po)(po)每(mei)循環(huan)節約費用(yong)(yong)258.4元(yuan)(yuan),即每(mei)延(yan)米(mi)節約76較元(yuan)(yuan),節約費用(yong)(yong)比(bi)例(li)達32%。此外,聚(ju)(ju)能(neng)水(shui)(shui)壓(ya)(ya)(ya)光面爆(bao)(bao)破(po)(po)能(neng)有(you)(you)效降(jiang)低(di)隧(sui)道(dao)內石渣(zha)塊度和粉塵含量(liang),還可使(shi)通風時間有(you)(you)效縮(suo)短(duan)33%。