【摘要】：為研究復(fù)雜漏風(fēng)條件下煤礦井下密閉區(qū)內(nèi)煤氧化溫升特性,利用大煤堆自然發(fā)火實(shí)驗(yàn)臺(tái),開展了持續(xù)漏風(fēng)(風(fēng)量0.6 m~3/h)、微漏風(fēng)(風(fēng)量0.6 m~3/h→0)及間斷漏風(fēng)(風(fēng)量0.4,1.2,0.4 m~3/h)條件下煤氧化過程與溫度變化特性的研究。實(shí)驗(yàn)結(jié)果得到了持續(xù)漏風(fēng)條件下風(fēng)流的散熱及供氧能力對(duì)煤自燃溫升的影響特性,表明密閉區(qū)的"呼吸"漏風(fēng)現(xiàn)象是引發(fā)煤氧化溫升突變的原因,尤其是密閉區(qū)內(nèi)注氮滅火后,煤體氧化溫度的變化對(duì)"呼吸"漏風(fēng)非常敏感。從理論上分析了復(fù)雜漏風(fēng)環(huán)境下高溫點(diǎn)的形成條件和演化規(guī)律。通過實(shí)驗(yàn),獲得了密閉區(qū)煤氧化高溫點(diǎn)形成的判斷依據(jù),為密閉區(qū)煤自燃防治技術(shù)提供了理論依據(jù)。
[Abstract]:In order to study the oxidation temperature rise characteristics of coal in the closed area of coal mine under complicated air leakage conditions, the spontaneous combustion test bench of large coal pile was used. The characteristics of oxidation process and temperature change of coal under the condition of continuous air leakage (0.6 m ~ (3 / h), slight air leakage (0.6 m ~ (3 / h) and intermittent air leakage (0.4 m ~ (2) / h) were studied. The experimental results show that the influence of air flow heat dissipation and oxygen supply ability on coal spontaneous combustion temperature rise is obtained under the condition of continuous air leakage, which indicates that the phenomenon of "respiratory" air leakage in the closed zone is the cause of the sudden change of coal oxidation temperature rise, especially after the nitrogen injection in the closed area is used to extinguish the fire. The change of oxidation temperature of coal body is very sensitive to air leakage. The formation conditions and evolution laws of high temperature points in complex air leakage environment are analyzed theoretically. Through the experiments, the judgment basis for the formation of oxidation high temperature points of coal in the closed area is obtained, which provides a theoretical basis for the prevention and control technology of coal spontaneous combustion in the closed area.
【作者單位】： 河南理工大學(xué)安全科學(xué)與工程學(xué)院;煤炭安全生產(chǎn)河南省協(xié)同創(chuàng)新中心;重慶大學(xué)煤礦災(zāi)害動(dòng)力學(xué)與控制國(guó)家重點(diǎn)試驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51304070,U1361205) 河南省科技攻關(guān)項(xiàng)目(162102210219) 煤礦災(zāi)害動(dòng)力學(xué)與控制國(guó)家重點(diǎn)實(shí)驗(yàn)室自主研究課題重點(diǎn)項(xiàng)目(2011DA105287-ZD201401)
【分類號(hào)】：TD752.2
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本文編號(hào)：2274491