GENESIS AND PROPERTY CLASSIFICATION OF TECTONIC COAL

It is well-acknowledged that the tectonic coal is necessary for the occurrence of a coal and gas outburst. Therefore, a good classification of the tectonic coal is significant to the prediction and precaution of the outburst. It firstly gives a new definition about tectonic coal according to the mechanical properties appeared by the tectonic coal during the outburst, which is a two-phase material combined by gas and coal, and characterized by low strength and different gas content from the origin coal. With these characters, three types tectonic coal are classified as 01 gas tectonic coal(01 GTC), 01 strength tectonic coal(01 STC) and 02 tectonic coal(02 TC),respectively correspond to coal with high gas content only, low strength only and both. Secondly, six types of genesis property tectonic coal are classified when combined the mechanical property classification and the brittle and ductile of rock failure, which is the traditional geology classification of rock failure form. It embodied three brittleness tectonic coals and three ductile tectonic coals, named as 01 brittle GTC(01 BGTC), 02 GTC,et al. Thirdly, it investigates the mechanism of the attendance in outburst by different tectonic coal. The stress concentration around STC,gas pore pressures and absorption weaken the effect on the coal. The high gas pressure to destroy and throw the coal are distinctive. Finally, based on the genesis property classification, it carries out a thorough investigation about the influence on the TC distribution and its gas genesis and storage condition by geology factors.