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A platform for research: civil engineering, architecture and urbanism
Challenge to Explain the Upward Surface Movement Above Abandoned Coal Mines
https://orcid.org/http://orcid.org/0000-0003-1994-4688
After the closure of several coal fields in Europe at the end of the twentieth century, a new phenomenon in the field of strata or ground control was observed above abandoned underground coal mines, i.e., the upward movement or uplift of the surface. A detailed analysis of Interferometry with Synthetic Aperture Radar data showed the complexity of this phenomenon. So far, it was a challenge to try to explain and understand this phenomenon. One should be aware that surface subsidence above the total extraction method of longwall mining already is one of the most complex rock mechanical problems. However, this type of downward surface movement is nowadays relatively well understood. On the other hand, the phenomenon of uplift has only been observed during the last decades and it is even more complex than surface subsidence, as the impact of the flooding of the underground infrastructure and rock mass plays a role too. By a systematic analysis of all relevant parameters, a framework has been established, allowing the calculation of the uplift above abandoned coal mines. It has been shown that not only the expansion of the softer parts, i.e., the collapsed or goaf material, is important, but the change in pore pressure in the non-collapsed strata layers must be integrated too into the model. The framework developed results in a good correlation between measured and calculated data along linear transects.
Challenge to Explain the Upward Surface Movement Above Abandoned Coal Mines
https://orcid.org/http://orcid.org/0000-0003-1994-4688
After the closure of several coal fields in Europe at the end of the twentieth century, a new phenomenon in the field of strata or ground control was observed above abandoned underground coal mines, i.e., the upward movement or uplift of the surface. A detailed analysis of Interferometry with Synthetic Aperture Radar data showed the complexity of this phenomenon. So far, it was a challenge to try to explain and understand this phenomenon. One should be aware that surface subsidence above the total extraction method of longwall mining already is one of the most complex rock mechanical problems. However, this type of downward surface movement is nowadays relatively well understood. On the other hand, the phenomenon of uplift has only been observed during the last decades and it is even more complex than surface subsidence, as the impact of the flooding of the underground infrastructure and rock mass plays a role too. By a systematic analysis of all relevant parameters, a framework has been established, allowing the calculation of the uplift above abandoned coal mines. It has been shown that not only the expansion of the softer parts, i.e., the collapsed or goaf material, is important, but the change in pore pressure in the non-collapsed strata layers must be integrated too into the model. The framework developed results in a good correlation between measured and calculated data along linear transects.
Challenge to Explain the Upward Surface Movement Above Abandoned Coal Mines
https://orcid.org/http://orcid.org/0000-0003-1994-4688
After the closure of several coal fields in Europe at the end of the twentieth century, a new phenomenon in the field of strata or ground control was observed above abandoned underground coal mines, i.e., the upward movement or uplift of the surface. A detailed analysis of Interferometry with Synthetic Aperture Radar data showed the complexity of this phenomenon. So far, it was a challenge to try to explain and understand this phenomenon. One should be aware that surface subsidence above the total extraction method of longwall mining already is one of the most complex rock mechanical problems. However, this type of downward surface movement is nowadays relatively well understood. On the other hand, the phenomenon of uplift has only been observed during the last decades and it is even more complex than surface subsidence, as the impact of the flooding of the underground infrastructure and rock mass plays a role too. By a systematic analysis of all relevant parameters, a framework has been established, allowing the calculation of the uplift above abandoned coal mines. It has been shown that not only the expansion of the softer parts, i.e., the collapsed or goaf material, is important, but the change in pore pressure in the non-collapsed strata layers must be integrated too into the model. The framework developed results in a good correlation between measured and calculated data along linear transects.
Challenge to Explain the Upward Surface Movement Above Abandoned Coal Mines
Lecture Notes in Civil Engineering
Verma, Amit Kumar (editor) / Mohamad, Edy Tonnizam (editor) / Bhatawdekar, Ramesh Murlidhar (editor) / Raina, Avtar Krishen (editor) / Khandelwal, Manoj (editor) / Armaghani, Danial (editor) / Sarkar, Kripamoy (editor) / Vervoort, André (author)
International Conference on Geotechnical Challenges in Mining, Tunneling and Underground Infrastructures ; 2021
Proceedings of Geotechnical Challenges in Mining, Tunneling and Underground Infrastructures ; Chapter: 8 ; 155-165
2022-06-04
11 pages
Article/Chapter (Book)
Electronic Resource
English
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