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- W2890310177 abstract "The fault fracture zone has is characterized by low strength, easy deformation and easy activation under the influence of high-strength mining, resulting in instability of the roadway coal rock mass in the affected area and thus severe deformation of the surrounding rock. Aiming to prevent serious deformation of a large section roadway along a fault in response to drivage, combined with specific geological conditions and supporting engineering practice of the panel of a coal mine, UDEC polygonal methods are used to compare and analyze the fracture development, stress distribution and deformation of roadway surrounding rocks and the bearing force of the supporting body of the original support scheme and the new support scheme. In the numerical simulation scheme, the study area is divided into polygonal blocks and the mechanical parameters of the blocks and contacts in the Voronoi program are determined by fitting the rock mass properties obtained through laboratory tests. A time-dependent strength degradation process is used to simulate the weakening effect of the fault on the surrounding rock mass. Then a new scheme for combined support involving key area strengthening and high-strength yielding bolts is proposed, which can ensure that the stress distribution of surrounding rock tends to be reasonable and that the deformation of roadway surrounding rock is in a reasonable range. In addition, the research results are applied successfully in the field." @default.
- W2890310177 created "2018-09-27" @default.
- W2890310177 creator A5007322337 @default.
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- W2890310177 date "2018-10-16" @default.
- W2890310177 modified "2023-10-17" @default.
- W2890310177 title "Discrete element simulation of the control technology of large section roadway along a fault to drivage under strong mining" @default.
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- W2890310177 doi "https://doi.org/10.1088/1742-2140/aae052" @default.
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