Numerical simulation of groundwater under complex karst conditions and the prediction of roadway gushing in a coal mine: a case study in the Guang’an Longtan Reservoir in Sichuan Province, China

Jiang Chengxin, Shi Huapeng, Li Ya, Yu Hongming*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Numerical simulation of groundwater in karst areas has long been restricted by the difficulty of generalizing the hydrogeological conditions of reservoirs and of determining the relevant parameters due to the anisotropy and discontinuity of the karst water-bearing media in these areas. In this study, we used the Guang’an Longtan Coal mine in Sichuan as an example, and generalized the complex hydrogeological conditions in the reservoir area. A finite element numerical flow model was used to simulate current and future scenarios of roadway gushing at the bottom of the coal mine at pile number 1 + 700 m. The results show that the roadway section corresponding to valleys has a gushing quantity of 4323.8–4551.25 m3/d before impoundment. Modeled water inflow after impoundment increased to 1.6 times the water inflow before impoundment, which threatens the impoundment as well as the roadway’s normal operation. Therefore, roadway processing measures are needed to guarantee the safety of the impoundment and of the mining operation.

Original languageEnglish
Pages (from-to)72-84
Number of pages13
JournalActa Geochimica
Volume35
Issue number1
DOIs
Publication statusPublished - 1 Mar 2016
Externally publishedYes

Keywords

  • Hydrogeological conditions generalization
  • Karst reservoir
  • Numerical simulation
  • Roadway gushing

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