Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory
Overburden key strata (KS) have a significant influence on abutment pressure distribution. However, current calculation methods for working surface abutment pressure do not consider the influence of the overburden KS. This study uses KS theory to analyze the overburden load transferred to coal-rock...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/7678327 |
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| author | Hongkai Han Jialin Xu Xiaozhen Wang Jianlin Xie Yantuan Xing |
| author_facet | Hongkai Han Jialin Xu Xiaozhen Wang Jianlin Xie Yantuan Xing |
| author_sort | Hongkai Han |
| collection | DOAJ |
| description | Overburden key strata (KS) have a significant influence on abutment pressure distribution. However, current calculation methods for working surface abutment pressure do not consider the influence of the overburden KS. This study uses KS theory to analyze the overburden load transferred to coal-rock masses on both sides of the stope through fractured blocks in different layers of the KS in the fissure zone and KS in different layers of the curve subsidence zone. Using Winkler’s elastic foundation beam theory, we consider the fissure zone KS on the coal mass side and the curve subsidence zone KS as many elastic foundation beams interact with each other. A method to calculate the abutment pressure of the coal mass and the goaf was then established, considering the influence of the overburden KS. The abutment pressure distribution of working surface 207 after mining was then calculated using our method, based on mining conditions present in the Tingnan coal mine. The calculated results were verified using measurements from borehole stress meters and microseismic monitoring systems, as well as numerical simulations. In addition, the calculation results were used to determine a reasonable position for the stopping line and remaining width of the roadway’s protection coal pillar in working surface 207. The results of this study can be used to calculate the abutment pressure distribution of the working surface under a variety of overburden KS conditions. The results can also provide guidance for forecasting and preventing mine dynamic hazards, controlling the surrounding rock in mining roadways, determining reasonable widths for protection coal pillars, and designing the layout of mining roadways. |
| format | Article |
| id | doaj-art-0b737134ba40444695574977f9ccb81c |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-0b737134ba40444695574977f9ccb81c2025-02-03T06:07:13ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/76783277678327Method to Calculate Working Surface Abutment Pressure Based on Key Strata TheoryHongkai Han0Jialin Xu1Xiaozhen Wang2Jianlin Xie3Yantuan Xing4School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resource and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaDisaster Prevention Research Institute, Shaanxi Changwu Tingnan Coal Co., Ltd., Xianyang 713602, ChinaOverburden key strata (KS) have a significant influence on abutment pressure distribution. However, current calculation methods for working surface abutment pressure do not consider the influence of the overburden KS. This study uses KS theory to analyze the overburden load transferred to coal-rock masses on both sides of the stope through fractured blocks in different layers of the KS in the fissure zone and KS in different layers of the curve subsidence zone. Using Winkler’s elastic foundation beam theory, we consider the fissure zone KS on the coal mass side and the curve subsidence zone KS as many elastic foundation beams interact with each other. A method to calculate the abutment pressure of the coal mass and the goaf was then established, considering the influence of the overburden KS. The abutment pressure distribution of working surface 207 after mining was then calculated using our method, based on mining conditions present in the Tingnan coal mine. The calculated results were verified using measurements from borehole stress meters and microseismic monitoring systems, as well as numerical simulations. In addition, the calculation results were used to determine a reasonable position for the stopping line and remaining width of the roadway’s protection coal pillar in working surface 207. The results of this study can be used to calculate the abutment pressure distribution of the working surface under a variety of overburden KS conditions. The results can also provide guidance for forecasting and preventing mine dynamic hazards, controlling the surrounding rock in mining roadways, determining reasonable widths for protection coal pillars, and designing the layout of mining roadways.http://dx.doi.org/10.1155/2019/7678327 |
| spellingShingle | Hongkai Han Jialin Xu Xiaozhen Wang Jianlin Xie Yantuan Xing Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory Advances in Civil Engineering |
| title | Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory |
| title_full | Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory |
| title_fullStr | Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory |
| title_full_unstemmed | Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory |
| title_short | Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory |
| title_sort | method to calculate working surface abutment pressure based on key strata theory |
| url | http://dx.doi.org/10.1155/2019/7678327 |
| work_keys_str_mv | AT hongkaihan methodtocalculateworkingsurfaceabutmentpressurebasedonkeystratatheory AT jialinxu methodtocalculateworkingsurfaceabutmentpressurebasedonkeystratatheory AT xiaozhenwang methodtocalculateworkingsurfaceabutmentpressurebasedonkeystratatheory AT jianlinxie methodtocalculateworkingsurfaceabutmentpressurebasedonkeystratatheory AT yantuanxing methodtocalculateworkingsurfaceabutmentpressurebasedonkeystratatheory |