Development mechanism of mining-induced ground fissure for shallow burial coal seam in the mountainous area of southwestern China: a case study

Title:

Development mechanism of mining-induced ground fissure for shallow burial coal seam in the mountainous area of southwestern China: a case study

Creator:

Zhu, Hengzhong , He, Fulian , and Fan, Yuqing

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:6b36ab54-fccb-4b82-affc-82d843576e0a
uuid:6b36ab54-fccb-4b82-affc-82d843576e0a
doi:10.13168/AGG.2018.0026

Subject:

development regularity, formation mechanism, sliding-type ground fissure, stepped-type ground fissure, horizontal tensile deformation, and main roof movement mode

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Mining-induced ground fissure (MIGF) contributes to vegetation deterioration, landslides and other natural hazards. The study is an attempt to reveal the development type, dynamic development process, and formation mechanism of MIGF for MIGF-induced natural hazard prevention of shallow burial coal seam mining. A novel approach including in situ measurement, theoretical analysis, and numerical simulation was implemented. There are two typical types of fissures, namely sliding-type ground fissures and stepped-type ground fissures. Sliding-type ground fissures generally develop in a mountainous slope with a large gradient while steppedtype ground fissures typically occur in a mountainous slope with a small gradient and especially near a valley. Dynamic development process of MIGF is significantly affected by roof periodic movement. The advancing distance of a sliding-type ground fissure is 1.35 times periodic weighting step distance while it corresponds to 0.89 times the periodic weighting step distance for a stepped-type ground fissure. A positive relationship exists between horizontal tensile deformation and MIGF width. The movement mode of “voussoir beam” is favorable for slidingtype ground fissure development while the movement mode of “stepped beam” leads to steppedtype ground fissure development. These results can contribute to MIGF treatment and ecological protection in the southwestern mountainous area.

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2018 Volume:15 | Number:4 (192)

Harvested from:

CDK

Metadata only:

false