煤层开采覆岩破坏与地表变形规律的数值模拟

基于研究矿区煤层覆岩的地质条件,结合数值模拟方法,研究了厚松散层薄基岩条件下不同采宽采厚开采的覆岩破坏与地表移动变形规律,得到了覆岩导水裂隙带高度随放采比及采厚增大而增大的结论,提出了该采区防水防砂技术,控制采高,加强顶板管理,为煤层的安全开采提供依据,为提高煤炭资源的开采率做出科学的分析和建议。

Numerical Simulation of Law of Overburden Failure and Surface Movement Due to Mining Under Thick Unconsolidated Layers

Based on the geological conditions of the overburden in research coal field,combining with the finite element numerical simulation,the rule of the overburden failure and the surface movement were analyzed under the different exploitation width and exploitation thickness in condition of the thick unconsolidated layers and thin bedrock.The conclusion was obtained that the height of water flowing fractured zone increased along with the increasing of the caving ratio and exploitation thickness.Some suggestions were put forward that the sand and water prevention technologies about the coal mine was controlling exploitation height and enhancing the roof management.The references were providing for the coal safty mining to make scientific analysis and recommendations for raising the rate of exploitation of coal resources.