Application on geophysical monitoring technology of geological structure detection in Jinfeng coal mine

摘要

In order to find out roof aquifer space distribution laws and geological abnormal body, such as internal concealed faults, small structures in No. 18 coal seam of Jinfeng mine are found. Through the detection of concealed geological conditions in working face, combined with field data of mine geological exploration and development, using the radio wave tunnel perspective method, the research mark out 7 tectonic anomalies in the area of this working face; by using audio frequency electric perspective and three figure-double predictive evaluation method, it forecasts water inrush disaster of water bearing stratum and detects two abnormal stripes whose apparent conductivity is greater than 6 s/m. Combined with electrical prospecting, the research deduces the southern relatively rich water distribution area is larger than the northern area in geophysical prospecting area, and the rich-water distribution area has a certain connection with water channels like faults. Thus it is concluded that the two stripes' position: the conductivity fracture zone height is about 59.67 m to 63.12 m, the caving zone height is between 30.91 m to 31.83 m, and coal seam roof water filling water containing No. 18 coal is to loose bed ripples induced by the roof at the crack between paragraphs sandstone aquifer.