| Autor: |
Xu, Qiang1,2 (AUTHOR), Yao, Qiangling1,2 (AUTHOR) yaoqiangling@cumt.edu.cn, Wang, Furong1,2 (AUTHOR), Xiao, Lei2,3 (AUTHOR), Ma, Junqiang1,2 (AUTHOR), Kong, Fanlong2,3 (AUTHOR), Shang, Xiaobei1,2 (AUTHOR) |
| Předmět: |
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| Zdroj: |
Mine Water & the Environment. Mar2024, Vol. 43 Issue 1, p104-116. 13p. |
| Abstrakt: |
Improving utilization of mine water in underground reservoirs requires determining the hydraulic connectivity between goafs. In this study, a new method for detecting the hydraulic connectivity between adjacent goafs based on a chemical tracer was proposed. First, based on the geological and mining conditions of the mine, a FLAC3D numerical model was established to analyze the distribution pattern of plastic zones on both sides of the coal pillar after mining, and the range of hydraulic connectivity testing in the goaf was preliminarily determined. Also, a tracer mass calculation model considering the water storage coefficient of goafs was established. The change rates of tracer concentration and water level of the goaf were used as the evaluation indexes for the hydraulic connectivity. The new detection method was applied to abandoned goafs in a coal mine and a plan was proposed to construct a coal mine underground reservoir, using the 31,301–31,307 goaf where the main reservoirs were constructed in the 31,303 and 31,305 goafs while the 31,307 goaf served as the auxiliary one. The 31,301 goaf cannot be utilized from the perspectives of cost and safety. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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