Analysis Of Gas Occurrence Regularity And The Main Influencing Factors Of No.2 Seam In Fengfeng Mining Area

Dashu village, Xue village, Yangquhe of Fengfeng mining had happened gas outburst recent years, with the deep coal mining continued to extend, geological conditions become more and more complex, gas is increasingly restricts safety constraints of mine.Gas is a geological body, the present occurrence state of coal gas is coal-bearing strata undergo complex geological evolution of the role of long-term results, controlled by gas generation, migration, preservation conditions comprehensive geological processes. In this paper, based on the theory of gas geology in the region of gas existing features and impact of occurrence, coal and gas outburst in the controlling factors, in order to provide reference for mine planning, mine ventilation design, use extraction of coal bed methane and coal and gas outburst forecast.Through the collection of gas and geological data of geological exploration, production stage, sorting the measured system parameters and analysis and field observations ,summed up the gas occurrence regularity of the second coal seam; using geological evolution and tectonic gradual control theory,study the southern section of the Taihang Mountains, Taihang Mountain piedmont fault tectonic controls on the peak characteristics of the Fengfeng mining area, analysis the control action of the area gas generation, preservation, migration of tectonic evolution;From the geological structure, coal quality, magmatic intrusion such as collapse column give a comprehensive study of the gas occurrence influencing factors in Fengfeng mining, obtained that the fault structure due to tectonic evolution and the discharge, runoff, and exclusion formation of groundwater caused the great difference of the gas distribution of Gu Mountain; The regional magmatic thermal metamorphism caused by magmatic intrusion stacking plutonic metamorphism indirectly caused by mine gas was gradually increased from south to north ,the three factors controlled the overall layout of mine;Comparative analysis the influencing factors of coal seam depth, bedrock thickness, roof and floor lithology, seam thickness and other factors to gas, affecting the depth of the region come to mine coal and gas emission content of the main factors; Low in the eastern region of gas and hige in western region is mainly determined by coal seam depth , and predicted the gas content and gas emission; statisticed coal and gas outburst and give the tectoniccoal of field observation,analysis the influencing factors of coal and gas outburst ofmining area.