Division of gas abnormal area based on geotectonic unit in Zouzhuang mine

In order to realize hierarchical systematic management of gas control, using the theory and method of gas geology, integrating actual production and geological structures, we divided Zouzhuang mine into three geological units. Through the study of the geological structures, characteristics of gas occurrence, development of tectonic coal in each geological unit, gas geology information revealed in mined-out area, a mathematical model to predict abnormal gas geological area was set up, and effect checking indexes applied in working face were used to verify the validity of the model. The point where dynamic phenomenon occurred during the actual mining was taken as the critical point, and the critical value was given to the corresponding indicators, eventually the gas prediction system with gas content (7.5 m³/t), relative gas emission (6.5 m³/t), thickness of tectonic coals (1.5 m) as core was formed.