o型聚能管廠家對于爆破作業安全技術的研究,是從兩個方面去考慮的,一方面是炸和起爆器材以及對其爆炸所造成的破壞作用進行限制的安全技術,這是主動的。另一個方面是對爆破所產生的危害采取的防護措施,這是被動的一個方面。兩者對阻止爆破帶來的破壞性有同樣的重要性,但在具體的爆破工程中,則常常會有變化不定的現象和后果,因此,必須對每一項工程破壞的具體情況作細致的分析研究,從而采取適當的對策。同時,o型聚能管廠家雖然技術(shu)不斷取得進步(bu),須(xu)在操作過程(cheng)中注(zhu)意每個工序,按照安(an)(an)全(quan)(quan)規(gui)(gui)程(cheng)認真作業。只要(yao)嚴(yan)格遵守(shou)安(an)(an)全(quan)(quan)規(gui)(gui)程(cheng)、正(zheng)確(que)(que)地采取安(an)(an)全(quan)(quan)技術(shu)措施和防護措施,任(ren)何(he)規(gui)(gui)模、任(ren)何(he)種類的(de)爆破是(shi)可以確(que)(que)保安(an)(an)全(quan)(quan)的(de)。一些安(an)(an)全(quan)(quan)規(gui)(gui)定(ding)的(de)條文是(shi)有(you)經驗教訓和理(li)論(lun)根(gen)據(ju)的(de),有(you)的(de)甚至是(shi)血的(de)教訓的(de)總結,所以一定(ding)要(yao)克服(fu)麻痹思(si)想(xiang),嚴(yan)格執行安(an)(an)全(quan)(quan)規(gui)(gui)定(ding),決不能以沒出過事故而(er)輕率地"突破"規(gui)(gui)定(ding)的(de)"框框"。
預裂與(yu)光(guang)(guang)面(mian)爆(bao)(bao)(bao)破(po)(po)(po)技術的歷史(shi)與(yu)現(xian)(xian)狀(zhuang):預裂爆(bao)(bao)(bao)破(po)(po)(po)是(shi)(shi)(shi)沿設(she)計開(kai)(kai)挖(wa)邊(bian)界布置密(mi)集(ji)炮孔(kong)(kong),采(cai)取不(bu)耦合裝(zhuang)(zhuang)藥或(huo)裝(zhuang)(zhuang)填(tian)(tian)低威力炸(zha)藥,在(zai)(zai)(zai)主爆(bao)(bao)(bao)區之前(qian)起(qi)爆(bao)(bao)(bao),從而在(zai)(zai)(zai)爆(bao)(bao)(bao)區與(yu)保(bao)留區之間形成預裂縫,以減弱(ruo)主爆(bao)(bao)(bao)破(po)(po)(po)對保(bao)留巖體的破(po)(po)(po)壞并形成平(ping)整(zheng)輪廓面(mian)的爆(bao)(bao)(bao)破(po)(po)(po)作(zuo)(zuo)業。光(guang)(guang)面(mian)爆(bao)(bao)(bao)破(po)(po)(po)是(shi)(shi)(shi)沿設(she)計開(kai)(kai)挖(wa)邊(bian)界布設(she)密(mi)集(ji)炮孔(kong)(kong),采(cai)用(yong)(yong)不(bu)耦合裝(zhuang)(zhuang)藥或(huo)裝(zhuang)(zhuang)填(tian)(tian)低威力炸(zha)藥,在(zai)(zai)(zai)主爆(bao)(bao)(bao)區爆(bao)(bao)(bao)破(po)(po)(po)之后(hou)起(qi)爆(bao)(bao)(bao)的以形成平(ping)整(zheng)的開(kai)(kai)挖(wa)輪廓面(mian)的爆(bao)(bao)(bao)破(po)(po)(po)作(zuo)(zuo)業。爆(bao)(bao)(bao)破(po)(po)(po)技術的發展是(shi)(shi)(shi)先(xian)出現(xian)(xian)光(guang)(guang)面(mian)爆(bao)(bao)(bao)破(po)(po)(po),然(ran)后(hou)衍生(sheng)發展為預裂爆(bao)(bao)(bao)破(po)(po)(po)。聚能管國內歷史(shi)與(yu)現(xian)(xian)狀(zhuang),我國于1964~1965年(nian)在(zai)(zai)(zai)湖北陸水(shui)水(shui)電站施工(gong)中(zhong)做過淺孔(kong)(kong)預裂爆(bao)(bao)(bao)破(po)(po)(po)試驗(yan),1965年(nian)鐵(tie)(tie)道部門在(zai)(zai)(zai)成昆鐵(tie)(tie)路(lu)(lu)建(jian)(jian)設(she)中(zhong)開(kai)(kai)始試驗(yan)光(guang)(guang)面(mian)爆(bao)(bao)(bao)破(po)(po)(po),1977年(nian)在(zai)(zai)(zai)西(xi)延線張家船工(gong)點,全長(chang)近200m的2000m2路(lu)(lu)塹(qian)邊(bian)坡(po)全部采(cai)用(yong)(yong)光(guang)(guang)面(mian)爆(bao)(bao)(bao)破(po)(po)(po),爆(bao)(bao)(bao)破(po)(po)(po)后(hou)邊(bian)坡(po)平(ping)整(zheng)穩定,殘留的半孔(kong)(kong)清(qing)晰可見,是(shi)(shi)(shi)鐵(tie)(tie)路(lu)(lu)建(jian)(jian)設(she)中(zhong)采(cai)用(yong)(yong)路(lu)(lu)塹(qian)光(guang)(guang)面(mian)爆(bao)(bao)(bao)破(po)(po)(po)。
聚能(neng)(neng)(neng)藥(yao)(yao)包(bao)破碎(sui)法特點是:不(bu)需要打眼(yan),因而不(bu)需要購(gou)買打眼(yan)設備(bei)和(he)(he)動力設備(bei);施工簡單,施工進度(du)比(bi)(bi)(bi)淺眼(yan)爆破法快安全(quan)性比(bi)(bi)(bi)普通(tong)淺眼(yan)爆破法和(he)(he)普通(tong)裸露藥(yao)(yao)包(bao)法好(hao)(hao);勞動強度(du)比(bi)(bi)(bi)淺眼(yan)爆破法低。制(zhi)造聚能(neng)(neng)(neng)藥(yao)(yao)包(bao)所采用(yong)的炸藥(yao)(yao)有:黑(hei)(hei)索金(jin)和(he)(he)梯(ti)恩梯(ti)混合熔鑄型;乳化油炸藥(yao)(yao)和(he)(he)黑(hei)(hei)索金(jin)混裝型和(he)(he)二號巖石硝鉸炸藥(yao)(yao)壓(ya)制(zhi)型。根據(ju)使用(yong)的結果(guo)證明(ming),選(xuan)用(yong)密度(du)較大(da)和(he)(he)爆速較高的炸藥(yao)(yao)制(zhi)造聚能(neng)(neng)(neng)藥(yao)(yao)包(bao)能(neng)(neng)(neng)獲得較好(hao)(hao)的破碎(sui)效果(guo)。這主要是由(you)(you)于它加(jia)工簡單和(he)(he)破碎(sui)能(neng)(neng)(neng)力較大(da)。在(zai)(zai)礦山由(you)(you)于二次破碎(sui)消耗(hao)的藥(yao)(yao)包(bao)較多,而且(qie)金(jin)屬藥(yao)(yao)型罩的加(jia)工費(fei)工又費(fei)材料,所以多不(bu)采用(yong)藥(yao)(yao)型罩。國(guo)內(nei)生產(chan)的一種用(yong)于破碎(sui)大(da)塊的聚能(neng)(neng)(neng)藥(yao)(yao)包(bao),裝置(zhi)聚能(neng)(neng)(neng)藥(yao)(yao)包(bao)時,要將藥(yao)(yao)包(bao)垂(chui)直裝在(zai)(zai)大(da)塊的頂面(mian)上(shang),聚能(neng)(neng)(neng)穴(xue)朝下。藥(yao)(yao)包(bao)位置(zhi)應(ying)選(xuan)在(zai)(zai)頂面(mian)的幾(ji)何中心或附近較平整(zheng)的地點。然后在(zai)(zai)上(shang)面(mian)覆蓋泥沙。
我國于1983年制定了(le)《水工(gong)(gong)建(jian)筑物巖(yan)行(xing)基(ji)礎(chu)(chu)開(kai)(kai)挖工(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)技術規(gui)(gui)范(fan)(fan)》(sD 121l一1983)。自此,在(zai)水利水電(dian)建(jian)設中預(yu)(yu)裂爆(bao)(bao)(bao)(bao)破(po)(po)(po)與(yu)光(guang)面爆(bao)(bao)(bao)(bao)破(po)(po)(po)已成為必須進行(xing)的(de)(de)(de)(de)保(bao)護邊(bian)坡(po)(po)質量的(de)(de)(de)(de)爆(bao)(bao)(bao)(bao)破(po)(po)(po)開(kai)(kai)挖技術措(cuo)施(shi)。此后在(zai)此基(ji)礎(chu)(chu)上修訂的(de)(de)(de)(de)《水工(gong)(gong)建(jian)筑物巖(yan)石基(ji)礎(chu)(chu)開(kai)(kai)挖工(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)技術規(gui)(gui)范(fan)(fan)》(SL 47一1994)以(yi)及(ji)在(zai)《水電(dian)水利爆(bao)(bao)(bao)(bao)破(po)(po)(po)工(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)技術規(gui)(gui)范(fan)(fan)》(DL/T 5135—2001)和(he)《水工(gong)(gong)建(jian)筑物巖(yan)石基(ji)礎(chu)(chu)開(kai)(kai)挖工(gong)(gong)程(cheng)(cheng)施(shi)工(gong)(gong)技術規(gui)(gui)范(fan)(fan)》(DL/T 5389~2007)中預(yu)(yu)裂爆(bao)(bao)(bao)(bao)破(po)(po)(po)與(yu)光(guang)面爆(bao)(bao)(bao)(bao)破(po)(po)(po)均被(bei)編入并有所改進,DL/T 5135—2001正在(zai)修編為DL/T 5135—2012。鐵道(dao)部也(ye)不僅規(gui)(gui)定了(le)凡是(shi)Ⅲ級以(yi)上的(de)(de)(de)(de)巖(yan)石邊(bian)坡(po)(po),設計(ji)邊(bian)坡(po)(po)坡(po)(po)度為1:0.1~1:0.75,在(zai)邊(bian)坡(po)(po)部位(wei)的(de)(de)(de)(de)爆(bao)(bao)(bao)(bao)破(po)(po)(po)設計(ji)和(he)施(shi)工(gong)(gong)都應(ying)采用(yong)光(guang)面爆(bao)(bao)(bao)(bao)破(po)(po)(po)或預(yu)(yu)裂爆(bao)(bao)(bao)(bao)破(po)(po)(po),并闡述了(le)光(guang)面(預(yu)(yu)裂)爆(bao)(bao)(bao)(bao)破(po)(po)(po)施(shi)工(gong)(gong)技術設計(ji)的(de)(de)(de)(de)原(yuan)則和(he)參數、安全(quan)措(cuo)施(shi),而且還明確(que)了(le)路塹邊(bian)坡(po)(po)光(guang)面(預(yu)(yu)裂)爆(bao)(bao)(bao)(bao)破(po)(po)(po)項(xiang)目質量驗收檢(jian)測(ce)數量和(he)檢(jian)測(ce)方(fang)法。無疑該規(gui)(gui)程(cheng)(cheng)的(de)(de)(de)(de)實施(shi),有力地推(tui)動和(he)促進了(le)光(guang)面(預(yu)(yu)裂)爆(bao)(bao)(bao)(bao)破(po)(po)(po)技術在(zai)鐵路建(jian)設中的(de)(de)(de)(de)應(ying)用(yong)與(yu)發展。
光(guang)面(mian)(mian)(mian)爆(bao)破技術(shu)優(you)勢:相對(dui)于傳統爆(bao)破工藝,聚能管(guan)光(guang)面(mian)(mian)(mian)爆(bao)破比常(chang)規爆(bao)破具有以下(xia)(xia)優(you)勢∶少(shao)(shao)(shao)(shao)打眼,少(shao)(shao)(shao)(shao)裝藥(yao)。節(jie)約(yue)周邊鉆(zhan)孔(kong)(kong)量(liang)50%,總鉆(zhan)孔(kong)(kong)進尺減少(shao)(shao)(shao)(shao)30%;節(jie)約(yue)炸藥(yao)10~20%,雷管(guan)30%。節(jie)約(yue)噴漿(jiang)料15-20%。節(jie)省時間∶每循環鉆(zhan)孔(kong)(kong)、裝藥(yao)、噴漿(jiang)時間1.5-2.0小時。在(zai)安全方面(mian)(mian)(mian)利用水沙袋替代(dai)炮(pao)(pao)(pao)(pao)泥,以避免搗炮(pao)(pao)(pao)(pao)泥損毀電雷管(guan)導線,造成瞎炮(pao)(pao)(pao)(pao)。大(da)大(da)減少(shao)(shao)(shao)(shao)對(dui)圍巖擾動,光(guang)面(mian)(mian)(mian)效果好,巖性(xing)條件(jian)差情況下(xia)(xia)可(ke)(ke)(ke)以大(da)大(da)減少(shao)(shao)(shao)(shao)超挖(wa)量(liang),控制(zhi)巷(xiang)(xiang)道成型;巖性(xing)完整(zheng)無(wu)節(jie)理情況下(xia)(xia)眼痕率(lv)可(ke)(ke)(ke)以達到90%以上,巷(xiang)(xiang)道成型好,穩定(ding)性(xing)強。布孔(kong)(kong)方式(shi)優(you)化成多(duo)排掏(tao)槽布孔(kong)(kong),單(dan)次掘(jue)進深度可(ke)(ke)(ke)以優(you)化提高10%到15%不等。由于炮(pao)(pao)(pao)(pao)孔(kong)(kong)數量(liang)大(da)大(da)減少(shao)(shao)(shao)(shao)可(ke)(ke)(ke)以考慮一起(qi)全斷面(mian)(mian)(mian)起(qi)爆(bao),節(jie)省放炮(pao)(pao)(pao)(pao)時間。