Abstract: Aiming at the characteristic of a typical deep coal mine,the roof of E₃₂₀₂ working face is classified,the laws of periodic weighing and dynamic pressure coefficient(dpc) changes at E₃₂₀₂ working face are studied.Linear formula between advance degree and periodic weighting is achieved by determining the pressure characteristics of E₃₂₀₂ working face;according to this,the rationality of support parameters at E₃₂₀₂ working face are analyzed.The results show that the supports fully meet the supporting requirements of E₃₂₀₂ caving face,which can provide technical parameters for face supporting design with similar conditions.