黄土覆盖矿区黄土层湿陷性对开采沉陷的影响研究

Influence of Collapsible Loess Layer on Mining Subsidence in Loess Covered Mining Area

为研究黄土覆盖矿区黄土层湿陷性对开采沉陷的影响,首先对湿陷性黄土层的基本物理特性进行阐述,然后利用土力学理论和试验手段对采动黄土层的湿陷机理进行研究,建立了采动黄土层湿陷引起的地表沉陷计算模型,并将研究结果应用到彬长矿区B40301工作面进行了验证分析。结果表明:湿陷性黄土层地表沉陷不仅受到工作面开采的直接影响还涉及黄土湿陷性产生的附加变形影响;推导出由采动黄土层湿陷引起的地表附加沉陷值计算公式。

In order to study the effects of collapsible loess on mining subsidence, the basic physical property of collapsible loess layer was analyzed, and the mechanism of mining induced loess layer collapse was studied based on soil mechanics theory and experiment, and calculation model was established for surface subsidence caused by mining induced loess layer collapse, and the study was applied it in the B40301 working surface of Binchang Coal Mine. The results show that, the surface subsidence of collapsible loess layer is not only directly affected by mining, the additional surface deformation caused by collapsible loess is also involved, and the formula of additional surface subsidence, caused by mining induced loess layer collapse, was deduced.