Overburden Failure Associated with Mining Coal Seams in Close Proximity in Ascending and Descending Sequences Under a Large Water Body
We investigated differences of overburden failure induced by mining multiple seams in ascending and descending sequences under a large water body. A case study that involves mining in an ascending sequence was the Beizao coal mine, which is under the Bohai Sea, and one that involves mining in a desc...
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| Veröffentlicht in: | Mine water and the environment 2018-06, Vol.37 (2), p.322-335 |
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| creator | Zhang, Dingyang Sui, Wanghua Liu, Jiawei |
| description | We investigated differences of overburden failure induced by mining multiple seams in ascending and descending sequences under a large water body. A case study that involves mining in an ascending sequence was the Beizao coal mine, which is under the Bohai Sea, and one that involves mining in a descending sequence was the Cuizhuang coal mine, which is under Weishan Lake. Using numerical simulations with the same geological conditions as the in-situ measurements, the effects of different interburden thicknesses on mining were compared. The results showed that the ratios of the heights of water-conducting fractured and caving zones to the cutting height both increased as the interburden thickness was reduced. An ascending sequence is recommended where there is a thin interburden and thin bedrock, and where the mining seams obviously interact. The descending sequence is recommended where there is no apparent interaction between the seams. Both will produce a relatively small water-conducting fractured zone. |
| doi_str_mv | 10.1007/s10230-017-0502-0 |
| format | Article |
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A case study that involves mining in an ascending sequence was the Beizao coal mine, which is under the Bohai Sea, and one that involves mining in a descending sequence was the Cuizhuang coal mine, which is under Weishan Lake. Using numerical simulations with the same geological conditions as the in-situ measurements, the effects of different interburden thicknesses on mining were compared. The results showed that the ratios of the heights of water-conducting fractured and caving zones to the cutting height both increased as the interburden thickness was reduced. An ascending sequence is recommended where there is a thin interburden and thin bedrock, and where the mining seams obviously interact. The descending sequence is recommended where there is no apparent interaction between the seams. Both will produce a relatively small water-conducting fractured zone.</description><identifier>ISSN: 1025-9112</identifier><identifier>EISSN: 1616-1068</identifier><identifier>DOI: 10.1007/s10230-017-0502-0</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Aquifers ; Bedrock ; Case studies ; Coal ; Coal mines ; Coal mining ; Computer simulation ; Earth and Environmental Science ; Earth Sciences ; Ecotoxicology ; Fractures ; Geology ; Hay ; Hydrogeology ; Industrial Pollution Prevention ; Lakes ; Lithology ; Mathematical models ; Mineral Resources ; Mining ; Mining accidents & safety ; Overburden ; Ratios ; Sequencing ; Technical Article ; Thickness ; Water bodies ; Water Quality/Water Pollution</subject><ispartof>Mine water and the environment, 2018-06, Vol.37 (2), p.322-335</ispartof><rights>The Author(s) 2017</rights><rights>Mine Water and the Environment is a copyright of Springer, (2017). All Rights Reserved.</rights><rights>The Author(s) 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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A case study that involves mining in an ascending sequence was the Beizao coal mine, which is under the Bohai Sea, and one that involves mining in a descending sequence was the Cuizhuang coal mine, which is under Weishan Lake. Using numerical simulations with the same geological conditions as the in-situ measurements, the effects of different interburden thicknesses on mining were compared. The results showed that the ratios of the heights of water-conducting fractured and caving zones to the cutting height both increased as the interburden thickness was reduced. An ascending sequence is recommended where there is a thin interburden and thin bedrock, and where the mining seams obviously interact. The descending sequence is recommended where there is no apparent interaction between the seams. 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| subjects | Aquifers Bedrock Case studies Coal Coal mines Coal mining Computer simulation Earth and Environmental Science Earth Sciences Ecotoxicology Fractures Geology Hay Hydrogeology Industrial Pollution Prevention Lakes Lithology Mathematical models Mineral Resources Mining Mining accidents & safety Overburden Ratios Sequencing Technical Article Thickness Water bodies Water Quality/Water Pollution |
| title | Overburden Failure Associated with Mining Coal Seams in Close Proximity in Ascending and Descending Sequences Under a Large Water Body |
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