Temporal and Spatial Evolution Mechanisms of the Water-Conducting Fractured Zone of Overlying Strata in the Kongzhuang Coal Mine

Kongzhuang coal mine of Shanghai Datun Energy Resources Co., Ltd. is a typical deep in eastern China. The mining disturbance working face leads to the fracture and movement overlying strata damage aquifer strata, thereby causing water inrush disaster posing serious threat safety production mine. Therefore, temporal spatial evolution mechanism water-conducting fractured zone researched systematically this paper. Especially, hydro-geological conditions are analyzed; on basis, simulated by physical similarity simulation test, rule obtained. Besides, development height “two zones” measured double-end shutoff detection method, risk assessment for seam roof carried out research achievements paper indicate that channel formed process #7 most important water-filling channel. Quaternary recharges indirectly through bedrock aquifer, sandy mudstone with large thickness key layer control zone. Meanwhile, caving 26.7 m, about 8.3 times height, 68.3 approximately equal 16.26 height. results #1 #2 borehole leakages method show 63.70 m-65.27 split-to-mining ratio 15.17-15.54. shows 7436 transition zone, small area around cutting hole relatively dangerous innovation revealed, which provides theoretical guidance prediction prevention similar conditions.