复杂漏风条件下煤体反复氧化与温升特性实验研究
发布时间：2018-10-16 13:21
【摘要】：为研究复杂漏风条件下煤矿井下密闭区内煤氧化温升特性,利用大煤堆自然发火实验台,开展了持续漏风(风量0.6 m~3/h)、微漏风(风量0.6 m~3/h→0)及间断漏风(风量0.4,1.2,0.4 m~3/h)条件下煤氧化过程与温度变化特性的研究。实验结果得到了持续漏风条件下风流的散热及供氧能力对煤自燃温升的影响特性,表明密闭区的"呼吸"漏风现象是引发煤氧化温升突变的原因,尤其是密闭区内注氮灭火后,煤体氧化温度的变化对"呼吸"漏风非常敏感。从理论上分析了复杂漏风环境下高温点的形成条件和演化规律。通过实验,获得了密闭区煤氧化高温点形成的判断依据,为密闭区煤自燃防治技术提供了理论依据。
[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.
【作者单位】： 河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;重庆大学煤矿灾害动力学与控制国家重点试验室;
【基金】：国家自然科学基金资助项目(51304070,U1361205) 河南省科技攻关项目(162102210219) 煤矿灾害动力学与控制国家重点实验室自主研究课题重点项目(2011DA105287-ZD201401)
【分类号】：TD752.2
，
本文编号：2274491
[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.
【作者单位】： 河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;重庆大学煤矿灾害动力学与控制国家重点试验室;
【基金】：国家自然科学基金资助项目(51304070,U1361205) 河南省科技攻关项目(162102210219) 煤矿灾害动力学与控制国家重点实验室自主研究课题重点项目(2011DA105287-ZD201401)
【分类号】：TD752.2
，
本文编号：2274491
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