复合采动条件下采动边坡变形破坏研究

Study on Deformation and Failure of Mining Slope Under Composite Mining Condition

随着矿山开采逐步发展,井工开采会对边坡原有平衡状态造成破坏,从而使边坡稳定性降低,在此基础上采用相似模拟试验对复合采动下采动边坡变形破坏进行研究。研究结果表明:在井工开采掘进情况下,4~#矿层的初步来压步距、垮落高度、垮落角,还有9~#矿层的初步来压步距、垮落高度、垮落角,符合实际工程状况;随着4~#矿层采掘长度的加大,坡体内部覆岩在不同作用力下沉降也在不断加大;随着9~#矿层采掘长度的不断加大,坡体沉降和塌陷也在不断加大。

With the gradual development of mining, the underground mining will destroy the original equilibrium state of the slope and to reduce the stability of slope. On the basis of this, a similar simulation test is used to study the deformation and failure of the mining slope under the composite mining. The results show that： in the case of underground mining and excavating, the initial pressure step, the collapse height, the collapse angle in 4# seam, and the initial pressure step, the collapse height, the collapse angle in 9# seam accord with actual project condition. With the increase of the mining length of the 4# seam, the sedimentation of the internal overburden of the slope is also increased under different force; with the continuous increase of the mining length of the 9# seam, the subsidence and collapse of the slope are also increased.