Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and Mass
As the development characteristics of cracks of the chamber are closely related to the bolt and cable anchoring parameters, the original rock stress of the surrounding rock, and fracture degree, this paper proposes the control method for chamber in extra-thick coal seam by the crack development char...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/1529797 |
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| _version_ | 1832546851711090688 |
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| author | Yang Tai Guozhi Lu Hongchun Xia Jinrong Liu Yanqun Zhang |
| author_facet | Yang Tai Guozhi Lu Hongchun Xia Jinrong Liu Yanqun Zhang |
| author_sort | Yang Tai |
| collection | DOAJ |
| description | As the development characteristics of cracks of the chamber are closely related to the bolt and cable anchoring parameters, the original rock stress of the surrounding rock, and fracture degree, this paper proposes the control method for chamber in extra-thick coal seam by the crack development characteristics. Based on the numerical model analysis, the chamber generates a large amount of shear cracks. Then, these cracks further extend and expand. When the cracks penetrate each other, the chamber bearing capacity decreases sharply, and the corresponding displacement also increases significantly. Based on the above rules, a chamber control method by high-strength anchor bolts and grouting reinforcement is proposed to improve the rock shear strength. By optimizing the anchor bolt parameters and grouting parameters, such as spacing, length, and the grouting pressure, the cracks are significantly reduced and the cracks are prevented from penetrating. Finally, an industrial test was conducted in the chamber at Datong Coal Group, and the chamber deformation was well controlled. |
| format | Article |
| id | doaj-art-06a6318a6b58479ea205ec361728cc01 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-06a6318a6b58479ea205ec361728cc012025-02-03T06:46:55ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/15297971529797Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and MassYang Tai0Guozhi Lu1Hongchun Xia2Jinrong Liu3Yanqun Zhang4College Engery and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege Engery and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Architectural Engineering, Dalian University, Liaoning, Dalian 116622, ChinaDatong Coal Mine Group Co. Ltd., Datong 037000, ChinaDatong Coal Mine Group Co. Ltd., Datong 037000, ChinaAs the development characteristics of cracks of the chamber are closely related to the bolt and cable anchoring parameters, the original rock stress of the surrounding rock, and fracture degree, this paper proposes the control method for chamber in extra-thick coal seam by the crack development characteristics. Based on the numerical model analysis, the chamber generates a large amount of shear cracks. Then, these cracks further extend and expand. When the cracks penetrate each other, the chamber bearing capacity decreases sharply, and the corresponding displacement also increases significantly. Based on the above rules, a chamber control method by high-strength anchor bolts and grouting reinforcement is proposed to improve the rock shear strength. By optimizing the anchor bolt parameters and grouting parameters, such as spacing, length, and the grouting pressure, the cracks are significantly reduced and the cracks are prevented from penetrating. Finally, an industrial test was conducted in the chamber at Datong Coal Group, and the chamber deformation was well controlled.http://dx.doi.org/10.1155/2020/1529797 |
| spellingShingle | Yang Tai Guozhi Lu Hongchun Xia Jinrong Liu Yanqun Zhang Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and Mass Advances in Civil Engineering |
| title | Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and Mass |
| title_full | Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and Mass |
| title_fullStr | Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and Mass |
| title_full_unstemmed | Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and Mass |
| title_short | Control of the Chamber in Extra-Thick Coal Seam Based on Fracture Characteristics of Coal Rock and Mass |
| title_sort | control of the chamber in extra thick coal seam based on fracture characteristics of coal rock and mass |
| url | http://dx.doi.org/10.1155/2020/1529797 |
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