上被保护层的保护范围扩界模拟

Simulation on Protection Range Expansion of Upper Protected Layer

为了进一步确定被保护层的实际保护范围,利用有限元分析软件Flac 3D,模拟淮北朱仙庄煤矿10煤Ⅱ10310工作面开采对上覆8煤Ⅱ836被保护层工作面的卸压过程,分析了其影响规律,同时结合现场考察结果确定上被保护层工作面的实际有效保护范围。研究结果表明,朱仙庄煤矿Ⅱ836上被保护层工作面的实际保护范围在走向与倾向(包括上部和下部)上均存在扩界现象,走向与倾向范围内的保护角均增至90°。

In order to further determine the actual protection scope of the protected layer,the finite element analysis software Flac 3D is used to simulate the pressure release process and analyse the influence law of the 10 coal seamⅡ10310 working face of Huaibei Zhuxianzhuang Coal Mine on the overlying 8 coal seamⅡ836 protected layer working face.Combined with the site investigation results,the actual effective protection range of the upper protected layer working face is studied.The research results show that the actual protection range of the working face of II 836 upper protected layer in Zhuxianzhuang Coal Mine has an expansion phenomenon in both the strike and inclination(including the upper and lower parts),and the protection angle in the strike and inclination range has increased to 90°.