矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2013年
5期
8-11
,共4页
吴宪%齐庆杰%徐长富%周新华
吳憲%齊慶傑%徐長富%週新華
오헌%제경걸%서장부%주신화
煤自燃%指标气体%热分析动力学%活化能%自燃预测%热重实验
煤自燃%指標氣體%熱分析動力學%活化能%自燃預測%熱重實驗
매자연%지표기체%열분석동역학%활화능%자연예측%열중실험
coal spontaneous combustion%index gas%thermal analysis kinetics%activation energy%spontaneous combustion prediction%thermo-gravimetric experiment
通过对含丝炭层与不含丝炭层典型煤样的热重与热解实验,以活化能为煤自燃倾向性指标,研究古山矿065-2煤层自然发火特性;测定实验煤样在不同热解温度下CO、CH4、C2 H4的浓度及浓度随温度的变化规律,结果表明:典型煤层氧化分解属一级化学反应,丝炭煤着火温度低、自然发火倾向性强,须重点监测和防治。在实验研究的基础上,结合指标气体选择的一般原则,建立以CO为主、C2 H4为辅的自然发火指标气体体系,提高煤炭早期自燃预测、预报的准确度,以预防矿井发生火灾。
通過對含絲炭層與不含絲炭層典型煤樣的熱重與熱解實驗,以活化能為煤自燃傾嚮性指標,研究古山礦065-2煤層自然髮火特性;測定實驗煤樣在不同熱解溫度下CO、CH4、C2 H4的濃度及濃度隨溫度的變化規律,結果錶明:典型煤層氧化分解屬一級化學反應,絲炭煤著火溫度低、自然髮火傾嚮性彊,鬚重點鑑測和防治。在實驗研究的基礎上,結閤指標氣體選擇的一般原則,建立以CO為主、C2 H4為輔的自然髮火指標氣體體繫,提高煤炭早期自燃預測、預報的準確度,以預防礦井髮生火災。
통과대함사탄층여불함사탄층전형매양적열중여열해실험,이활화능위매자연경향성지표,연구고산광065-2매층자연발화특성;측정실험매양재불동열해온도하CO、CH4、C2 H4적농도급농도수온도적변화규률,결과표명:전형매층양화분해속일급화학반응,사탄매착화온도저、자연발화경향성강,수중점감측화방치。재실험연구적기출상,결합지표기체선택적일반원칙,건립이CO위주、C2 H4위보적자연발화지표기체체계,제고매탄조기자연예측、예보적준학도,이예방광정발생화재。
Through thermo-gravimetric and paralytic experiments of typical coal samples containing fusain layer and not containing fusain layer,study was made on the spontaneous combustion characteristics of 062-2 coal seam by taking the activation energy as the coal spontaneous combustion tendency index,and measurements were carried out on the concentration of CO,CH4 and C2 H4 in coal samples at different paralytic temperature and the variation of the concentration of these gases with temperature. The results show that that oxidation decomposition of typical coal samples belongs to the first-order chemical reaction,and the coal containing fusain has low ignition temperature and strong spontaneous combustion tendency, so it needs to be monitored and controlled emphatically;On the basis of the experimental study and combined with the general principle of the index gas selection, a spontaneous combustion index gas system with CO as the main index gas and C2 H4 as the auxiliary index gas was established, which can improve the accuracy of coal spontaneous combustion prediction and prevent the occurrence of mine fires.