采动影响下急倾斜底板破坏防治

针对采动影响下急倾斜工作面“非均衡”的围岩应力分布对底板破坏深度的影响问题，结合相关力学理论建立了工作面走向受力特点的底板塑性破坏受力模型，根据经验公式得出不同应力集中系数下的底板破坏深度公式，并对某矿急倾斜工作面底板不同破坏深度位置进行支护模拟。研究结果表明:急倾斜工作面中上部、中部和中下部底板破坏深度不同，根据计算分析得出的破坏深度和数值模拟分析得出的无支护状态下3个位置底板破坏深度对应误差最大为0.9 m较合理。最后在工作面3个位置的对应深度处进行底板注浆临时支护，研究结果能够有效抑制底板破坏，对急倾斜工作面底板管理具有现实意义。

Failure prevention of steeply inclined floor under influence of mining

For mining of steep face "unbalanced" under the influence of the influence of the surrounding rock stress distribution on the depth of floor damage problem，combined with related mechanics theory established a face to the mechanical characteristics of floor plastic destruction force model，and according to the empirical formula obtained under different stress concentration factor of plate damage depth formula，and the depth of destruction of steeply inclined coal face a mine bottom different location support simulation.The research results show that the steeply inclined coal face in upper，middle and the lowest floor damage depth is different，according to the calculation and analysis of damage depth and the numerical simulation analysis of three locations without supporting condition floor damage depth corresponding to the maximum error of 0.9 m is more reasonable.In the face three position corresponding to a depth of floor temporary supporting，grouting results can effectively inhibit backplane，management of steeply inclined coal face slab has a realistic significance.