煤巷自燃非线性流固热耦合研究
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摘要
论文以理论研究与计算机数值求解技术相结合的方法,研究了煤巷自燃的发展历程
及其流固热耦合的参数特征,给出了煤巷在不同应力条件下渗流系数的非线性流固热耦
合关系式,建立了漏风渗流场、增温场的非线性流固热耦合数值模型,通过算例对数值
模型进行了求解并验证了这些模型的正确性。
论文建立了用于煤巷自燃研究的几何场效模型;给出了在不考虑耦合影响条件下进
行煤巷自燃研究的通用模型及其解法;探讨了煤巷自燃耗O_2释热参数的特征及其测算方
法;从理论上分析了煤巷自热自燃的热力作用特征与热力着火模型。
论文分析了煤巷沿空侧巷旁煤柱自热自燃的热固变形特征及其动态发展历程,给出
了用于描述煤巷自燃平面应变问题的变形场参数模型;得出了煤体自燃热应力σ~T与渗流
系数k(φ)间流固热耦合的关系模型和修正的煤巷自燃弹塑性变形场的流固热的参数耦合
模型。考虑煤巷自燃渗流场中的流固热耦合因素,建立了煤巷自燃渗流场的流固热耦合
数值模型;结合兖州矿区煤巷自燃实例对模型进行了数值求解。
在对煤巷自燃增温场的研究中,考虑其中的流固热耦合因素,研究确定了煤巷自燃
增温场动态发展的流固热耦合数值求解模型;给出了定量确定耦合模型中自热自燃源项
的计算式;结合兖州矿区煤巷自燃实例对增温场模型进行了数值求解,验证了模型的可
靠性和正确性;将煤巷自燃非线性流固热耦合模型应用于煤巷自燃的预测预报,可以有
效防止煤巷自燃的发生与发展。
本文尝试从反映煤巷自燃流固热的参数耦合关系上研究煤层自然发火的动态发展历
程,探索了煤层自然发火问题研究的新途径,为矿井火灾科学的发展起到了积极作用。
With theory researches and the computer numerical simulation method , this paper has studied the developing progress of the spontaneous combustion of coal roadway porous pillar and its parameters performance of air-coal-heat coupled , the nonlinear air-coal-heat coupled relationship formula of the self-heating roadway pillar under different conditions has been given , the nonlinear air-coal-heat coupled mathematics models of the air-leek permeability field and the temperature field has been established . According to the results of the models by way of real example, the lightness of these models has been tested.This paper has set up a geometric model for the purpose of studying of spontaneous combustion of coal pillar. The general model and its solving method of the spontaneous combustion of coal roadway porous pillar without the consideration of air-coal-heat coupled conditions has been given. The properties and its measuring method of parameters of O_2 consuming and heat release of the spontaneous combustion of roadway pillar have been discussed. The heating power action characteristics and the heating power ignition model of the spontaneous combustion of roadway pillar have been theoretically analyzed.This paper has analyzed the heat-coal deformation features and its dynamic developing process of the spontaneous combustion of roadway gob side pillar. The deformation field parameter's model of two dimensions strain problem for describing the spontaneous combustion of roadway pillar has been given. The air-coal-heat coupled relational expression between the heat stress σ~T of the spontaneous combustion of roadway pillar and its permeability coefficient k(φ) has been obtained, and the corrected air-coal-heat parameter-coupled models of the elastic-plastic deformation field of the spontaneous combustion of roadway pillar also have been obtained. By taking into account the air-coal-heat coupled factor of the temperature increasing field of the spontaneous combustion of roadway pillar, the air-coal-heat coupled numerical model of the air-leek field of the spontaneous combustion of roadway pillar has been established, and its numerical simulating solution has been obtained connecting with an example of the spontaneous combustion of roadway pillar in Yanzhou coal mining area.During the research process of the temperature increasing field of the spontaneous combustion of roadway pillar, By consideration of the air-coal-heat coupled factor in the
temperature increasing field of the spontaneous combustion of roadway pillar, the air-coal-heat coupled numerical model of the temperature increasing field of the spontaneous combustion of roadway pillar has been determined. The computing formula of the self-heating and combustion heat release source in the coupled models has been set up. The numerical simulating solution to the temperature increasing field model has been obtained connecting with an example of the spontaneous combustion of roadway pillar in Yanzhou coal mining area, and the model's reliability and validity also have been proved. By using the nonlinear air-coal-heat coupled numerical model of the spontaneous combustion of roadway pillar for the forecasting and prediction of the spontaneous combustion of roadway pillar, The spontaneous combustion disaster of roadway pillar could be effectively avoid .This paper has tried a method of studying the process of spontaneous combustion of roadway pillar from the parameters air-coal-heat coupled relationship, explored a new way of studying the problems of the spontaneous combustion of coal seam, and played a positive role for the development of mine fire science.
及其流固热耦合的参数特征,给出了煤巷在不同应力条件下渗流系数的非线性流固热耦
合关系式,建立了漏风渗流场、增温场的非线性流固热耦合数值模型,通过算例对数值
模型进行了求解并验证了这些模型的正确性。
论文建立了用于煤巷自燃研究的几何场效模型;给出了在不考虑耦合影响条件下进
行煤巷自燃研究的通用模型及其解法;探讨了煤巷自燃耗O_2释热参数的特征及其测算方
法;从理论上分析了煤巷自热自燃的热力作用特征与热力着火模型。
论文分析了煤巷沿空侧巷旁煤柱自热自燃的热固变形特征及其动态发展历程,给出
了用于描述煤巷自燃平面应变问题的变形场参数模型;得出了煤体自燃热应力σ~T与渗流
系数k(φ)间流固热耦合的关系模型和修正的煤巷自燃弹塑性变形场的流固热的参数耦合
模型。考虑煤巷自燃渗流场中的流固热耦合因素,建立了煤巷自燃渗流场的流固热耦合
数值模型;结合兖州矿区煤巷自燃实例对模型进行了数值求解。
在对煤巷自燃增温场的研究中,考虑其中的流固热耦合因素,研究确定了煤巷自燃
增温场动态发展的流固热耦合数值求解模型;给出了定量确定耦合模型中自热自燃源项
的计算式;结合兖州矿区煤巷自燃实例对增温场模型进行了数值求解,验证了模型的可
靠性和正确性;将煤巷自燃非线性流固热耦合模型应用于煤巷自燃的预测预报,可以有
效防止煤巷自燃的发生与发展。
本文尝试从反映煤巷自燃流固热的参数耦合关系上研究煤层自然发火的动态发展历
程,探索了煤层自然发火问题研究的新途径,为矿井火灾科学的发展起到了积极作用。
With theory researches and the computer numerical simulation method , this paper has studied the developing progress of the spontaneous combustion of coal roadway porous pillar and its parameters performance of air-coal-heat coupled , the nonlinear air-coal-heat coupled relationship formula of the self-heating roadway pillar under different conditions has been given , the nonlinear air-coal-heat coupled mathematics models of the air-leek permeability field and the temperature field has been established . According to the results of the models by way of real example, the lightness of these models has been tested.This paper has set up a geometric model for the purpose of studying of spontaneous combustion of coal pillar. The general model and its solving method of the spontaneous combustion of coal roadway porous pillar without the consideration of air-coal-heat coupled conditions has been given. The properties and its measuring method of parameters of O_2 consuming and heat release of the spontaneous combustion of roadway pillar have been discussed. The heating power action characteristics and the heating power ignition model of the spontaneous combustion of roadway pillar have been theoretically analyzed.This paper has analyzed the heat-coal deformation features and its dynamic developing process of the spontaneous combustion of roadway gob side pillar. The deformation field parameter's model of two dimensions strain problem for describing the spontaneous combustion of roadway pillar has been given. The air-coal-heat coupled relational expression between the heat stress σ~T of the spontaneous combustion of roadway pillar and its permeability coefficient k(φ) has been obtained, and the corrected air-coal-heat parameter-coupled models of the elastic-plastic deformation field of the spontaneous combustion of roadway pillar also have been obtained. By taking into account the air-coal-heat coupled factor of the temperature increasing field of the spontaneous combustion of roadway pillar, the air-coal-heat coupled numerical model of the air-leek field of the spontaneous combustion of roadway pillar has been established, and its numerical simulating solution has been obtained connecting with an example of the spontaneous combustion of roadway pillar in Yanzhou coal mining area.During the research process of the temperature increasing field of the spontaneous combustion of roadway pillar, By consideration of the air-coal-heat coupled factor in the
temperature increasing field of the spontaneous combustion of roadway pillar, the air-coal-heat coupled numerical model of the temperature increasing field of the spontaneous combustion of roadway pillar has been determined. The computing formula of the self-heating and combustion heat release source in the coupled models has been set up. The numerical simulating solution to the temperature increasing field model has been obtained connecting with an example of the spontaneous combustion of roadway pillar in Yanzhou coal mining area, and the model's reliability and validity also have been proved. By using the nonlinear air-coal-heat coupled numerical model of the spontaneous combustion of roadway pillar for the forecasting and prediction of the spontaneous combustion of roadway pillar, The spontaneous combustion disaster of roadway pillar could be effectively avoid .This paper has tried a method of studying the process of spontaneous combustion of roadway pillar from the parameters air-coal-heat coupled relationship, explored a new way of studying the problems of the spontaneous combustion of coal seam, and played a positive role for the development of mine fire science.
引文
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