2022
DOI: 10.2113/2022/2520477
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Movement Law of Overlying Strata and Abutment Pressure Redistribution Characteristic Based on Rigid Block

Abstract: Roof movement induced by coal excavation is the immediate cause of rock pressure redistribution and strata behavior. The rigid block in PFC3D was used to generate a multijointed rock mass, and the PFC3D–FLAC3D coupling model was used to study the movement law of the highly developed structural plane of the overlying strata. Strata movement and abutment pressure redistribution characteristics were obtained. The numerical simulation results showed that the multijointed rock mass model reproduced a rock mass with… Show more

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Cited by 2 publications
(2 citation statements)
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“…Rock strata movement deformation law in closed goaf area [6,9,42]: When the goaf is not closed for treatment, the rock strata movement deformation is distributed in the position of an unstable ore column, and the rock mass moves violently and causes large surface subsidence. When the goaf takes a long time to redistribute the rock mass stress to equilibrium during the closed treatment period, the rock strata movement deformation are still in the area where the unstable ore column is located.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Rock strata movement deformation law in closed goaf area [6,9,42]: When the goaf is not closed for treatment, the rock strata movement deformation is distributed in the position of an unstable ore column, and the rock mass moves violently and causes large surface subsidence. When the goaf takes a long time to redistribute the rock mass stress to equilibrium during the closed treatment period, the rock strata movement deformation are still in the area where the unstable ore column is located.…”
Section: Discussionmentioning
confidence: 99%
“…According to statistics, the land damaged by mining activities in China has exceeded 4 million hm 2 , of which more than 1.4 million hm 2 and the area of surface collapse is more than 35.2hm 2 caused by mining activities[1], The main cause of ground damage and collapse is due to the formation of a mining area as a result of ore extraction, which breaks the original rock stress balance and causes rock movement deformation in the rock stress redistribution [2]. Generally, the movement deformation of underground mining rock mass are divided into two stages, and the surface will produce four settlement areas [3], In the initial stage of mining, the horizontal in-situ stress is not completely released, the geological structure has less influence on the surface subsidence [4], and when the exposed area of the goaf reaches a certain value, there is a sudden process of rock strata movement deformation, resulting in surface subsidence [5,6], and the rock strata movement deformation and surface subsidence law under different working conditions are different [7][8][9][10][11]; Therefore, in order to ensure safe and efficient mining of mines, it is indispensable to study the movement deformation and surface subsidence monitoring of mine rock masses.…”
Section: Introductionmentioning
confidence: 99%