水壓爆(bao)破(po)是(shi)在炮(pao)(pao)孔(kong)(kong)兩(liang)(liang)端填充水袋(dai),中(zhong)(zhong)間(jian)(jian)裝(zhuang)上乳化(hua)炸,炮(pao)(pao)孔(kong)(kong)再用(yong)(yong)炮(pao)(pao)泥封死,炮(pao)(pao)孔(kong)(kong)間(jian)(jian)距(ju)很大,兩(liang)(liang)個炮(pao)(pao)空之(zhi)間(jian)(jian)相距(ju)了(le)一米左(zuo)右(you),是(shi)常規(gui)爆(bao)破(po)的(de)(de)(de)(de)(de)炮(pao)(pao)孔(kong)(kong)間(jian)(jian)距(ju)的(de)(de)(de)(de)(de)兩(liang)(liang)倍,這樣(yang)可以節省炮(pao)(pao)孔(kong)(kong)材(cai)料,這兩(liang)(liang)個凹槽又稱為(wei)聚能(neng)槽,聚能(neng)槽非常重(zhong)要(yao),放置(zhi)的(de)(de)(de)(de)(de)位(wei)置(zhi)和方向(xiang)都十分講究,一點也(ye)不能(neng)出(chu)錯,在爆(bao)破(po)的(de)(de)(de)(de)(de)瞬(shun)間(jian)(jian),高(gao)溫高(gao)壓聚能(neng)射(she)流立即往(wang)凹槽兩(liang)(liang)邊(bian)的(de)(de)(de)(de)(de)巖石進行切(qie)割(ge),巖石如同豆腐一樣(yang)輕(qing)松被(bei)切(qie)割(ge)切(qie)割(ge)出(chu)來的(de)(de)(de)(de)(de)輪廓(kuo)線(xian)十分平順,效果(guo)(guo)極(ji)好,聚能(neng)水壓爆(bao)破(po)中(zhong)(zhong)的(de)(de)(de)(de)(de)水袋(dai)沒有降(jiang)低爆(bao)破(po)的(de)(de)(de)(de)(de)效果(guo)(guo),反而能(neng)保護隧道周(zhou)邊(bian)植被(bei),減少地質擾動,降(jiang)低煙塵(chen),重(zhong)要(yao)的(de)(de)(de)(de)(de)是(shi)節省炸成(cheng)本(ben),在未來這項技術會廣泛應用(yong)(yong)于(yu)工(gong)程(cheng)中(zhong)(zhong),降(jiang)低施工(gong)成(cheng)本(ben)。爆(bao)破(po)聚能(neng)管水壓光面爆(bao)破(po)較水壓光面爆(bao)破(po),在周(zhou)邊(bian)眼單(dan)循環火(huo)工(gong)品(pin)使用(yong)(yong)量上節約費用(yong)(yong)8.3%,周(zhou)邊(bian)眼鉆孔(kong)(kong)數量從39個下降(jiang)為(wei)23個費用(yong)(yong)節約41%,混凝土噴射(she)每延(yan)米節約1.37立方米。
在工程爆破中,o型聚能管公司常用的起爆方法有:電力起爆法、導火索起爆法、導爆索起爆法、導爆管起爆法。電力起爆法是利用電能使雷管爆炸,進而起爆炸藥的起爆芳法。它所需的器材有:電雷管、導線和起爆電源。電爆網路的連接形式,要根據爆破方法、爆破規模、工程的重要性、所選起爆電源及其起爆能力等進行選擇,陽江o型聚能管基本連接方式有(you):串聯(lian)(lian)、并(bing)(bing)聯(lian)(lian)、串并(bing)(bing)聯(lian)(lian)和(he)并(bing)(bing)串聯(lian)(lian)等。電(dian)(dian)(dian)力(li)起爆(bao)(bao)(bao)法(fa)具有(you)較安全、可靠、準確、高效(xiao)等優(you)點,在國(guo)內外仍占有(you)較大(da)比重。在大(da)、中(zhong)型爆(bao)(bao)(bao)破中(zhong),主(zhu)要仍是用(yong)電(dian)(dian)(dian)力(li)起爆(bao)(bao)(bao)。特別是在有(you)瓦斯、礦塵爆(bao)(bao)(bao)炸(zha)的環(huan)境中(zhong),電(dian)(dian)(dian)力(li)起爆(bao)(bao)(bao)是主(zhu)要的起爆(bao)(bao)(bao)方法(fa)。但電(dian)(dian)(dian)力(li)起爆(bao)(bao)(bao)容易(yi)受各種電(dian)(dian)(dian)信號(hao)的干擾而(er)發生早爆(bao)(bao)(bao),因此(ci)在有(you)雜散電(dian)(dian)(dian)、靜電(dian)(dian)(dian)、雷(lei)(lei)電(dian)(dian)(dian)、射頻(pin)電(dian)(dian)(dian)、高壓感應電(dian)(dian)(dian)的環(huan)境中(zhong),不能使用(yong)普通電(dian)(dian)(dian)雷(lei)(lei)管(guan)。
聚(ju)能(neng)包(bao)(bao)由炸(zha)、形(xing)(xing)(xing)(xing)罩(zhao)(zhao)、隔板、殼體、引(yin)信和(he)支(zhi)架等(deng)部分組成(cheng),其(qi)(qi)作用及對聚(ju)能(neng)包(bao)(bao)威(wei)力的(de)(de)(de)影響分述如下。1.炸(zha),炸(zha)是聚(ju)能(neng)管(guan)爆破的(de)(de)(de)能(neng)源,炸(zha)的(de)(de)(de)爆壓越大,聚(ju)能(neng)彈威(wei)力越大;為(wei)得(de)到高爆壓,需高爆速、高密(mi)度(du)的(de)(de)(de)炸(zha)。常用炸(zha)有(you)(you)梯恩梯、8321炸(zha)等(deng),裝方(fang)法(fa)有(you)(you)熔鑄,塑(su)裝和(he)壓裝多種(zhong)。2.型罩(zhao)(zhao),型罩(zhao)(zhao)的(de)(de)(de)作用是把炸(zha)的(de)(de)(de)爆炸(zha)能(neng)轉化成(cheng)罩(zhao)(zhao)體材料(liao)的(de)(de)(de)射(she)流(liu)動能(neng),從(cong)而提高其(qi)(qi)穿透(tou)和(he)切(qie)割(ge)能(neng)力。型罩(zhao)(zhao)的(de)(de)(de)材料(liao)必須滿足四點要求,即可(ke)(ke)壓縮性小、密(mi)度(du)高、塑(su)性和(he)延展性好,在形(xing)(xing)(xing)(xing)成(cheng)射(she)流(liu)中不汽化。大量試(shi)驗證明,用紫(zi)銅(tong)制作型罩(zhao)(zhao)效(xiao)果好,其(qi)(qi)次(ci)為(wei)鑄鐵(tie)、鋼和(he)陶瓷。型罩(zhao)(zhao)的(de)(de)(de)形(xing)(xing)(xing)(xing)狀多種(zhong)多樣,主要有(you)(you)軸(zhou)(zhou)對稱型,如圓錐形(xing)(xing)(xing)(xing)、半球(qiu)形(xing)(xing)(xing)(xing)、拋物線形(xing)(xing)(xing)(xing)和(he)喇叭(ba)形(xing)(xing)(xing)(xing)等(deng);面對稱型,常見的(de)(de)(de)有(you)(you)用于切(qie)割(ge)屬板材的(de)(de)(de)直線形(xing)(xing)(xing)(xing)和(he)用于切(qie)割(ge)管(guan)材的(de)(de)(de)環形(xing)(xing)(xing)(xing)聚(ju)能(neng)罩(zhao)(zhao)兩(liang)種(zhong);中心對稱型,這種(zhong)球(qiu)形(xing)(xing)(xing)(xing)聚(ju)能(neng)包(bao)(bao),中心有(you)(you)球(qiu)形(xing)(xing)(xing)(xing)空腔(qiang)和(he)球(qiu)形(xing)(xing)(xing)(xing)罩(zhao)(zhao),球(qiu)形(xing)(xing)(xing)(xing)罩(zhao)(zhao)外敷設炸(zha),若(ruo)能(neng)在瞬間同時起(qi)爆,可(ke)(ke)在空腔(qiang)中心點獲得(de)極大的(de)(de)(de)能(neng)量集中。在工程中常用的(de)(de)(de)是軸(zhou)(zhou)對稱型和(he)面對稱型兩(liang)類型罩(zhao)(zhao)。
我國20世紀60年代利用(yong)斷裂力(li)學(xue)(xue)對巖石損傷引起的(de)(de)(de)裂紋(wen)擴(kuo)展(zhan)進行(xing)過試驗(yan)(yan)(yan)研(yan)究,為(wei)聚能(neng)(neng)(neng)爆破技(ji)(ji)術應用(yong)到工(gong)程做(zuo)了不少理(li)(li)論分析,也(ye)取得(de)一些(xie)進展(zhan)。80年代中期開始進行(xing)應用(yong)研(yan)究,以北京礦業學(xue)(xue)院(yuan)為(wei)代表,著重研(yan)究了聚能(neng)(neng)(neng)藥包切割饑理(li)(li)和(he)應用(yong)。1987年淮南礦業學(xue)(xue)院(yuan)取得(de)“雙(shuang)面(mian)切割器”的(de)(de)(de)zhuanli,1995年又取得(de)“大(da)理(li)(li)石花崗(gang)巖切割技(ji)(ji)術應用(yong)”zhuanli。1991年中國水電七局曾試圖采用(yong)硬質紙加(jia)工(gong)聚能(neng)(neng)(neng)藥管成(cheng)形聚能(neng)(neng)(neng)藥卷做(zuo)過聚能(neng)(neng)(neng)預裂爆破試驗(yan)(yan)(yan)研(yan)究,但終(zhong)因當時的(de)(de)(de)技(ji)(ji)術及(ji)工(gong)藝水平(ping)的(de)(de)(de)限制(zhi)(zhi)無法(fa)用(yong)于正常施(shi)工(gong),但是(shi)他(ta)們(men)開了橢(tuo)圓雙(shuang)極(ji)線性聚能(neng)(neng)(neng)結構試驗(yan)(yan)(yan)的(de)(de)(de)先河。雙(shuang)聚能(neng)(neng)(neng)預裂與(yu)光面(mian)爆破綜合(he)技(ji)(ji)術開創(chuang)輪廓控(kong)制(zhi)(zhi)爆破新(xin)時代。