关键词: 矿压显现, 基本顶力学模型, 弹性地基梁理论, 矿压观测

Abstract: The mining pressure manifestation in the longwall fully mechanized mining face is an important factor affecting the safety production of coal mines, and its strength analysis and effective monitoring are of great significance to ensure the stability and safety of the mining face. Based on the roof conditions of Chahasu 31319 working face, the specific indicators of mine pressure display of working face were determined, and the basic roof load of the working face and the initial and periodic pressure step distance of the working face were calculated; the basic roof mechanical bearing model was established, the roof stability analysis was carried out, and the roof of 31319 working face was analyzed in combination with the roof separation conditions; the stope partition bearing model was established by using the elastic foundation beam theory, The stope is simplified into original rock I zone, support II zone, goaf non-collapse III zone and goaf collapse IV zone, The variation characteristics of mechanical parameters such as mechanical deflection, rotation angle, bending moment, shear force and other mechanical parameters of the basic roof of the working face in different mining stages are obtained: the deflection curve image of the basic roof under different loads shows a parabolic change of the opening downward, the overall change of the rotation angle is an "S" shape, the bending moment is a parabolic change of the opening upward, and the shear force changes linearly. Combined with the theoretical analysis results, the monitoring content of mine pressure in the fully mechanized mining face of 31319 and the layout method of measuring points are proposed. The research results can lay a key foundation for the prevention and control of roof disasters on the working face and the safe and efficient mining of coal mines.