基于FLAC3D的综放工作面联络巷密闭墙合理参数研究

Study on Reasonable Parameters of Airtight Wall in Crossheading of Fully Mechanized Caving Face Based on FLAC3D

为了确定综放工作面联络巷密闭墙的合理厚度和位置，确定了岩体及粉煤灰材料力学特性参数及数值模拟本构模型、边界条件，采用ansys软件软件建立综放工作面联络巷密闭墙数值模型并设定了相关参数和应力条件，采用FLAC叫软件对不同工况下密闭墙受力、变形和破坏进行了数值模拟分析，研究不同构筑位置以及厚度对密闭墙应力场、变形量场和塑性破坏场的影响。数值模拟结果表明：当联络巷长度为20m，密闭墙合理的构筑位置为距离巷道交叉处15m；合理的密闭墙体宽度为4．9m。

To determine the reasonable thickness and position of contact lane closed wall at fully mechanized caving face, we identified mechanics parameters and numerical simulation constitutive model, boundary conditions of fly ash material and rock mass. We use an- sys software to establish fully mechanized caving face contact lane closed wall and set a numerical model parameters and stress - related conditions by FLAC3D software to analyze different conditions closed wall stress, deformation and destruction, and study the impact of different positions and thickness on closed wall stress field, deformation field and plastic failure field. Simulation resfihs show that when contacted lane length is 20 m, the reasonable distance of closed wall is from the location of the roadway at the intersection of 15 m; rea- sonable airtight wall width is 4.9 m.