the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Kinetic characteristics investigation of the Yingxingping rockslide based on discrete element method combined with discrete fracture network
Abstract. The development of rock fractures on the mountain ridge in meizoseismal area may lead to fatal rockslides. This study focused on a catastrophic post-earthquake rockslide in Wenchuan, Southwestern China, to illustrate this geological phenomenon. On-site inquiries and aerial photography were used to ascertained the basic characteristics and determine three regions: the source area, transitional area, and depositional area. A three-dimensional discrete element method (DEM) with the discrete fracture network (DFN) was employed to assess the dynamic process of the rockslide. The sliding mass disintegrated quickly into smaller blocks, with those in the front-edge reaching the bottom of the slope earlier and experiencing higher acceleration. The maximum velocity and displacement of the sliding blocks were found to be 56.75 m/s and 508.61 m, respectively, lasting for approximately 104.45 seconds. The effects of fractures density and friction angle on kinetic characteristics were analysed, and a check dam was utilized to intercept the rockslide deposit in the debris flow gully. This study provides valuable information for assessing the kinetic process and preventing post-earthquake rockslides in meizoseismal areas.
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Status: open (until 06 Oct 2024)
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CC2: 'Comment on egusphere-2024-2216', Qiwen Lin, 11 Sep 2024
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In this manuscript, the dynamic process of a rockslide was evaluated by three-dimensional discrete element method (DEM) combined the discrete fracture network (DFN). This paper is well written. I think it can be accepted via minor revision. I have some comments which may be useful during the revision:
1. The integration of field investigations and numerical simulations is a highly effective research approach. However, it is noted that the submission seems lacking comprehensive comparative analysis between the results obtained from field investigations and numerical simulations.
2.Lines 140~183: it is not necessary to introduce the computing process of the DEM, instead, you may cite related papers.
3.The arrangement of Figure 6 should be rearranged to enhance the clarity of the numbers in Figure 6c.Citation: https://doi.org/10.5194/egusphere-2024-2216-CC2 -
CC3: 'Comment on egusphere-2024-2216', zhongtian chen, 13 Sep 2024
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In this submission, on-site inquiries and aerial photography were firstly utilized to study the basic characteristics of rockslides, and then the dynamic process of rockslide and the influences of fractures density and friction angle on kinetic characteristics were studied using the 3D discrete element method with the discrete fracture network. Generally speaking, this submission provides valuable information for assessing the dynamic process from on-site inquiries and numerical simulations based on innovative research methods, but there are still some issues that need to be revised to be published.
1. In the Introduction section, although there have been significant advancements in field investigations, theoretical models, and numerical simulations related to rockslides, the author should to highlight the innovative and necessary contributions of this submission's research.
2. Section 3.2, the bedrock and sliding rock mass were considered to be separate in the initial stage? The authors should provide a detailed explanation.Citation: https://doi.org/10.5194/egusphere-2024-2216-CC3
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