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Characteristics of in situ stress and its influence on coal seam permeability in the Liupanshui Coalfield, Western Guizhou by Fang, Xiaojie (author);Wu, Caifang (author);Jiang, Xiuming (author);Liu, Ningning (author);Zhou, Dan (author);Ju, Yiwen (author) is a Engineering article available to read on EtoBox.
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## Abstract The current in situ stress regime is of great significance to the exploration and development of coalbed methane (CBM). In this study, the vertical stress (), maximum horizontal principal stress (), and minimum horizontal principal stress () in the Liupanshui Coalfield were studied. Variations of the maximum and minimum envelopes and trend lines of the lateral pressure coefficient () with depth were obtained, and the non‐monotonic decrease of permeability with burial depth was determined. On this basis, the effect of in situ stress on the coal reservoir permeability was evaluated. The results show that the average vertical stress gradient of the main coal seam in the Liupanshui Coalfield is 0.024 MPa/m. Generally, there are two stress regimes of > > (44.23%) and > > (46.15%); > > accounts for a smaller proportion (9.62%), and only occurs in relatively shallow coal seams (<622.85 m). In the range of the tested burial depths, for > is dominant; > > is dominant between 600 and 800 m; and between 800 and 980 m, the coal reservoir is affected by both > > and > > , representing a transition zone between the two stress states. With the increase of burial d
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- Author
- Fang, Xiaojie (author);Wu, Caifang (author);Jiang, Xiuming (author);Liu, Ningning (author);Zhou, Dan (author);Ju, Yiwen (author)
- Publisher
- Wiley
- Published
- 2021
- Language
- EN
- Field
- Engineering (Physical Sciences)