無機(jī)膠凝泡沫防滅火技術(shù)研究.pdf

1、論文題目：無機(jī)膠凝泡沫防滅火技術(shù)研究專業(yè)：安全科學(xué)與工程碩士生：郭戎(簽名)指導(dǎo)教師：張辛亥(簽名)摘要我國很多煤礦存在礦井自燃火災(zāi)現(xiàn)象，對(duì)煤礦安全生產(chǎn)產(chǎn)生極大的危害，造成了大量的人員傷害和經(jīng)濟(jì)損失。為了滿足煤礦井下防滅火工作的需要，本文研究了一種無機(jī)膠凝泡沫防滅火技術(shù)，并開發(fā)出相應(yīng)的無機(jī)膠凝泡沫防滅火材料，其既能夠?qū)虏煽諈^(qū)、漏風(fēng)裂隙等區(qū)域進(jìn)行密閉封堵，也能夠直接用于撲滅井下火災(zāi)。對(duì)無機(jī)膠凝泡沫防滅火材料的各個(gè)組份進(jìn)行了配比優(yōu)化，測

2、試了各組份的不同配比對(duì)材料的抗壓強(qiáng)度、初凝時(shí)間和終凝時(shí)間的影響。實(shí)驗(yàn)結(jié)果表明：無機(jī)膠凝泡沫防滅火材料中，當(dāng)膠凝劑的比例為水泥48%、快速膠凝劑32%、粉煤灰20%時(shí)，材料的凝固時(shí)間較短、抗壓強(qiáng)度值較高；水與膠凝劑的比例為0.4，減水劑摻量為0.2%時(shí)，形成的膠凝泡沫材料孔結(jié)構(gòu)較好，強(qiáng)度較高；高性能泡沫的發(fā)泡倍數(shù)為15倍時(shí)，對(duì)膠凝泡沫材料的性能最有利；泡沫的摻量可以按實(shí)際需求進(jìn)行調(diào)整，當(dāng)泡沫摻量約為材料漿液體積的十倍時(shí)，材料28d的抗壓強(qiáng)

3、度仍能夠達(dá)到0.91MPa，能夠滿足井下充填密閉的需要。然后，進(jìn)一步對(duì)無機(jī)膠凝泡沫防滅火材料漿液的工藝性能和滅火降溫能力進(jìn)行了測試。實(shí)驗(yàn)結(jié)果表明，材料漿液是一種非牛頓流體，具有剪切稀化的特點(diǎn)，且具有屈服應(yīng)力；材料在松散煤體中的滲流，與滲流壓力和煤體介質(zhì)的空隙率有關(guān)。最后，對(duì)無機(jī)膠凝泡沫防滅火技術(shù)進(jìn)行了現(xiàn)場密閉充填實(shí)驗(yàn)，實(shí)驗(yàn)結(jié)果表明無機(jī)膠凝泡沫防滅火技術(shù)充填速度快、充填效果好、充填成本較低，實(shí)用性和經(jīng)濟(jì)性較好。關(guān)鍵詞：煤自燃；泡沫；膠凝材

4、料；充填；防滅火研究類型：應(yīng)用研究Subject:StudyonthetechnologyoffirepreventionwithinganicgelatinizationfoamSpecialty:SafetyScienceEngineeringName:GuoRong（Signature）Instruct:ZhangXinhai（Signature）ABSTRACTThemajityofChinesecoalminesarefaci

5、ngthethreatfromcoalspontaneouscombustion.Ithascausedalotofcasualtieseconomiclosses.Indertomeettheneedofthefirepreventionextinguishingincoalmineanewkindoftechnologyoffirepreventionwithinganicgelatinizationfoamisdevelopedi

6、nthispaper.Theinganicgelatinizationfoamissynthesizedwithgelatinizingagentwaterbasedfoamwateradditivesbycertainprocess.Thistechnologycanbeusednotonlytosealtheminedoutareacrackbutalsotoextinguishthefiredisasterincoalmine.T

7、hecompositionsoftheinganicgelatinizationfoamthecompressivestrengthsettingtimeofthematerialswhichareinfluencedbytheradiobetweendifferentcompositionsweretestedstudiedoptimizedinthepaper.Throughtheexperimentsshowthatifthege

8、latinizingagentsintheinganicgelatinizationfoamwerecomposedof48%dinaryPtlcement32%quickhardeninggelatinizer20%flyashthematerialswillgethighercompressivestrengthshtersettingtime.Whenthewatercementratiois0.4with0.2%waterred

9、ucerinitthebubbleofthegelatinizationfoamwillbepreferablythecompressivestrengthwillbehigher.Itisinthebestperfmanceoftheinganicgelatinizationfoammaterialswhentheexpansionradioofthewaterbasedfoamis15.Themixingamountoffoamca

10、nbeadjustedaccdingtoactualneeds.Whenthefoamisabouttentimesthesizeofthematerialslurrythe28dcompressivestrengthofmaterialscanreach0.91Mpaitcansatisfytheneedofsealsinthecoalmine.Inadditionthepaperdoesresearchintothematerial

11、s’apparentviscosityrheologicalbehaviseepagecoolingabilitytheeffectoffiresuppression.Theexperimentalresultsshowthatthematerialsslurryisakindofnonnewtonianfluidwiththeacteristicsofashearthinningyieldstress.Materialsslurryp