Longwall mining, shale gas production, and underground miner safety and health
| Autor: | Daniel W.H. Su, Robert Kimutis, Peter Zhang, M. Van Dyke, Heather Dougherty |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Mining engineering. Metallurgy
Test site Shale gas Instrumentation Abutment TN1-997 Energy Engineering and Power Technology Miner Geotechnical Engineering and Engineering Geology Mining Coal Mining engineering Geochemistry and Petrology Gas Groundwater-related subsidence Longwall mining Longwall Inclinometer Safety Casing Geology |
| Zdroj: | International Journal of Mining Science and Technology, Vol 31, Iss 3, Pp 523-529 (2021) |
| ISSN: | 2095-2686 |
| Popis: | This paper presents the results of a unique study conducted by the National Institute for Occupational Safety and Health (NIOSH) from 2016 to 2019 to evaluate the effects of longwall-induced subsurface deformations on shale gas well casing integrity and underground miner safety and health. At both deep-cover and shallow-cover instrumentation sites, surface subsidence measurements, subsurface in-place inclinometer measurements, and underground pillar pressure measurements were conducted as longwall panels were mined. Comparisons of the deep-cover and shallow-cover test site results with those from a similar study under medium cover reveal an interesting longwall-induced response scenario. Under shallow and medium covers, measured horizontal displacements within the abutment pillar are one order of magnitude higher than those measured under deep cover. On the other hand, measured vertical compressions under deep cover are one order of magnitude higher than those under shallow and medium covers. However, FLAC3D simulations of the casings indicate that, in all three cases, the P-110 production casings remain intact under longwall-induced deformations and compressions, which has serious implications for future mine design in areas where shale gas wells have been drilled ahead of mining. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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