Mining Stability Criterion of Weakly Cemented Aquiclude and Its Application

The effective discrimination of aquiclude mining stability is one the important indexes for feasibility judgement water-conserved mining. Based on mining-induced deformation characteristics weakly cemented and water level change aquifer in northwest China, a mechanical model established, instability criterion its influencing factors are analyzed. results show that has strong plastic ability mainly undergoes bending during coal Considering groundwater pressure variation aquifer, expressions deflection, stress components, strain components derived. Furthermore, criteria proposed. influences thickness, elastic modulus, Poisson’s ratio, level, coalface length, longwall panel length research applied to judgment Xinjiang Ehuobulake Coal Mine, validity verified.