工作面跨大巷连续开采大巷层位优化技术研究

Research on Optimization technology of roadway horizon in Continuous Mining Cross the Main Roadway of the Working Face

以进行端氏煤矿大巷层位优化为目的,通过理论计算工作面底板破坏深度,得出了当前大巷层位不适合实行工作面跨大巷开采的结论。通过FLAC^(3D)数值模拟分析了采场底板应力及其不同层位巷道的应力及变形破坏规律,确定将大巷层位布置在煤层以下25 m以K5灰岩为底板的岩层中,此层位可以有效减少工作面超前支承压力对底板大巷的影响。

For the purpose of optimizing the roadway horizon in Duanshi Coal Mine,through the theoretical calculation of the failure depth of the floor of the working face,it is concluded that the current layer of the main roadway is not suitable for mining across the main roadway of the working face.The stress of the stope floor and the stress and deformation failure law of the roadway in different layers are analyzed by FLAC^(3D)numerical simulation,and it is determined that the main roadway will be arranged in the rock layer 25 m below the coal seam with K5 limestone as the floor.This layer can effectively reduce the influence of leading abutment pressure of working face on floor main roadway.