Application of comprehensive geophysical exploration technology in water control of overlying bedrock on large wide working face
With the gradual increase of coal mining depth,underground geological structures,especially hydrogeological structures,are becoming more and more complex,and mine safety and coal mining are often plagued by small structures and underground water damage.Thus it is necessary to find out the water-bearing and internal geological structure of the overly-ing bedrock on the working face before mining.For the detection of water-bearing and internal structure of the working face,the commonly used geophysical exploration methods include audio frequency electric penetration and radio wave perspec-tive.Because the coal seams in Shendong mining area have stable occurrence,good coal quality and superior mining condi-tions,the design width of the mining face is large.Taking the 22122 working face of Cuncaota No.2 mine in Ordos,North China Plain as an example,the author investigates the internal structure of the working face and the water enrichment of the overlying bedrock of the roof of the working face by combining the two comprehensive geophysical exploration methods of tunnel radio wave perspective and audio electric penetration.Based on the two geophysical exploration methods and actual hydrogeological data,the water damage analysis of the mining face is carried out,and the water conductance/water conduct-ance channel of the overlying strata on the large wide working face is accurately predicted,which fully demonstrates the ef-fective penetration of electromagnetic wave on the large wide working face,and provides a reliable basis for the prevention of water damage on the mining face.
comprehensive geophysical exploration technologymine water hazardtunnel radio wave perspectiveaudio electrical penetrationbedrock aquifers
万方数据
维普
