| Coal spontaneous combustion is one of the big disaster in the coal product. Combined with coal characteristics in goaf of fully mechanized top-coal caving, determinant criteria and methods of hazard zone in goaf are determined by theory of coal spontaneous combustion zone. Based on the former research work, correlation between coal particle and oxygen consumption in different temperature was studied through small-scale experiment. Meanwhile, temperature characteristic and velocity of oxygen consumption are also studied by full-scale experiment. Using conversation of energy and estimation of chemical bond energy to obtain heat release of coal sample, the limit parameters of self-ignite of coal sample are made sure. Aiming at the forecasting of coal spontaneous combustion in goaf, a kind of software by means of VB6.0 has been developed to analyze and determine coal spontaneous combustion zone in goaf, based on the experimental studies and locale observation. Integrated with modeling of function and direction from up to down, this software has friendly user interface and powerful ability of data processing such as data input and complex calculation, area automated partition of heat release, oxidization temperature rise and asphyxiation, curve diagram drawing and result output graphically. Finally, the software was successfully applied to the goaf of fully mechanized top-coal caving in 3006 HeBi Third Mine, which illustrates it has great applicability and maneuverability. The software not only satisfies the need of determination of coal spontaneous combustion zone in goaf but also optimizes greatly the process of analyzing and determining.
|
PDF Full Text Request