New Progress of Theory of Field Flow Safety in Goaf and Its Study
LI Zong-xiang,Assoc. Prof. (Vocational College, Liaoning Technical University,Fuxin 123000, China)
The concept of safety theory for field flow in goaf is introduced. The development course of numerical simulation for fluidity of field flow in goaf, gas outburst and the theory of the "three zones" for spontaneous combustion and spontaneous combustion temperature are briefly summarized. The current progress and development trend in the study of safety theory of field flow in goaf are analyzed. It is pointed out that the study of mine ventilation safety theory is at an historical critical point, namely the transition and unification from network flow ventilation safety theory to field flow safety theory. The background environment of air leakage and oxygen supply system under specific mining conditions should be considered synthetically in the study of goaf problems, such as gas outburst and spontaneous combustion. The main orientation of theoretic research should be on the analysis of influential relationship between disaster and each factor based on field flow method, and the emphases is on the general law such as disaster mechanism and coupling among multiple disasters. The technical means are fluid mechanics in porous medium, multiphase gas diffusion, integrative heat transfer theory and numerical simulation based on finite element method. The key problems are astringency stability and flow field distribution of the model solution.
【CateGory Index】： TD724