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基于模糊渗流理论的采场自然发火位置预测模型及其相似模拟研究
Study of the Forecast Model Based on Fuzzy Seepage Theory and Resembling Simulation about the Position of Spontaneous Combustion in Mining Field
【作者】 陈长华；
【导师】 宜茂生；
【作者基本信息】 辽宁工程技术大学 ， 采矿工程， 2004， 博士
【摘要】 本项研究针对矿井下采空区岩石冒落形成的多孔隙介质空间的极度不规则性，提出了模糊渗透系数的概念，建立了一种以模糊分析和模糊微分方程为基础的及各种边值为条件的，计算采场气体模糊渗流问题的数学模型。围绕模糊微分方程定解问题，提出了模糊分析计算的模糊结构元方法，并利用模糊结构元的方法对模糊值函数的表述问题、模糊值函数的微分、黎曼意义下的模糊值函数积分以及模糊微分方程的解的结构等问题，进行了深入系统的研究。该项理论研究成果为预防采空区自然发火提供了有效的途径，对采场内自然发火位置的预测及发火位置控制有较好的理论价值和指导意义。 本项目还研制了相似模拟模型，针对采空区自然发火问题进行了多项模拟实验，观测并绘制了不同风量下采空区风压等值线及风流分布图；绘制了采空区不同位置漏风情况下风压等值线及风流分布图；绘制了上隅角设置瓦斯排放风筒后采空区风压等值线及风流分布图；设计了采空区充填带，并获得了采空区风压等值线及风流分布图。论述了风量、风压、漏风带、充填带、对采空区自然发火的影响，形象地验证了上述理论的正确性，取得了较好的效果。
【Abstract】 Considering the extreme irregularity of porous medium space that is formed in the goaf of mine when the overlying rock layers are caving, the concept of fuzzy permeability coefficient is put forward, then a mathematical model is educed to calculate the fuzzy seepage flow problem of mining field air in this thesis, which is based on fuzzy analysis and fuzzy differential equation and is conditioned by various boundary values. Around the finite solution problem of fuzzy differential equation, the fuzzy structure element method is put forward about the calculation of fuzzy analysis, and this method is applied to systematically study many problems such as formulation of fuzzy-valued function, difference of fuzzy-valued function, integration of fuzzy-valued function under the Riemann meaning, and the solution structure of fuzzy differential equation etc.. The theoretic research conclusions can provide an effective approach to prevent spontaneous combustion in goaf, which also have the theoretic value and direction meaning to forecast and control the position of spontaneous combustion in the mining field.By developed the resembling simulation models, many experiments are carried out to research the spontaneous combustion in goaf. Then, the goaf ventilation pressure isoline and ventilation flow distribution are observed and drawn, which are also drawn after the air duct for gas releasing is placed in the upper corner of coal face and after the stowing strips are placed in goaf. The influence of ventilation quantity, ventilation pressure, air leak strips and stowing strips on spontaneous combustion in goaf is discussed, so validity of the above theories is confirmed, and the effect is perfect.