Research On Explosion Mechanism And Prevention Measures Of Coal Gangue Dump

Coal gangue is the low carbon but high ash content of solid wastes, which release from coal mine constructing, coal mining and processing. In recent years, gangue dump trigger accidents caused by spontaneous combustion happen more and more frequently. The continuous gangue dump collapses and exploding accidents leading to casualties and significant economic losses, has brought negative effects to coal enterprises'development.Coal gangue dump explosion is an extreme complex process of physics and chemistry. It changes from normal temperature to the state of spontaneous combustion explosion, which is affected and restricted by a variety of factors. The thesis analyzes the intrinsic causes of spontaneous combustion gangue dump explosion through establishing the experimental setup of coal gangue explosions; inducing gangue combustion by using the external heat sources; making it interact with water and combining with the modern testing equipment and analytical techniques, then observing the process of gangue dump combustion and explosion, the explosion pressure of experiments, the rules of diversification of all compositional gases. At the same time, combining with thermodynamic theory, the thesis also analyzes from theory the gas effect of the gangue dump explosion and its inducing process of physics and chemistry. According to the experiments, integrating the law of Newton, the equation of energy, and the equation of state,etc. The thesis establishes by researches the model of gangue dump explosive power and the relation of its reaction with ejection. At last, a perfect theoretical system of gangue dump explosion is founded. On the basis of the researching results, it deduces the preventing measures to the combustion gangue dump explosion in order to avoid human casualties and economic losses, as well as promote the coal enterprises to develop continually, rapidly and healthily.