放顶煤工作面煤岩组合力学模型及其控制

Coal-Rock Compound Mechanical Models and its Control in the Top-Coal Caving Faces

根据放顶煤工作面的矿山压力及其显现规律、顶煤冒放结构、顶板移动结构等影响因素,结合我国厚煤层赋存状况,给出放顶煤工作面拱—拱、拱—砌体梁、拱—传递岩梁、台阶式悬臂—砌体梁以及台阶式悬臂—悬梁组合力学模型及其控制计算公式;在实践中根据工作面具体条件分析使用以上五种力学模型,则可求得较合理的支架工作阻力,从而有效地实现顶板控制。

According to the ground pressure and its explicit rules, the top - coal caving structures, the roof moving structures, and etc. of the top - coal caving faces, and combined with the buried conditions of the thick coal seams in our country, the mechanical models of arch - arch structure, the arch - brick block beam structure, the arch - transferring beam structure, the converse step cantilever - brick block beam structure, the converse step cantilever - cantilever beam structure are all brought forward in top - coal caving faces, together with their controlling calculate formulas. The above five mechanical models can be used respectively based on the specific conditions of the coal faces, and the reasonable supporting working resistance could be worked out, so that the roof - control can be realized efficiently in top - coal caving faces.