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| Control over Surrounding Rocks Deformation of Soft Floor and Whole-Coal Gateways with Trapezoidal Supports | |
| 引用本文： | ZHAIXin-xian LIDe-Quan SHAOQiang SUNYu-feng. Control over Surrounding Rocks Deformation of Soft Floor and Whole-Coal Gateways with Trapezoidal Supports[J]. 中国矿业大学学报(英文版), 2005, 15(2): 118-123 |
| 作者姓名： | ZHAIXin-xian LIDe-Quan SHAOQiang SUNYu-feng |
| 作者单位： | [1]DepartmentofResourceandMaterialEngineering,HenanPolytechnicUniversity,Jaozuo,Henan454000,China [2]ChangcunColliery,YimaCoalGroupCo.Ltd.,Sanmenxia,Henan472300,China [3]DepartmentofSocialScience,ShandongInstituteofBusinessandTechnology,Yantai,Shangdong264005,China |
| 基金项目： | Project 0511051900 supported by Natural Science Foundation of Henan Province |
| 摘 要： | In Gengcun Colliery, Yima Coal Group Co. Ltd.the characteristics of the gateways of thick coal seam and the coal seam is with fully mechanized sublevel caving mining are that the thickness of roof coal seam of gateways is larger, their surrounding rocks are the whole-coal mass and the coal seam is prone to Spontaneous Combustion. With the natural equilibrium arch theory, the reasonable adjacent distance of No. 11 mine-type metal supports was calculated in trapezoidal gateways based on these characteristics. Then, in-situ supporting experiments were carried out. There sults indicate that under the action of virgin rock stress, the width of broken rocks zone of surrounding rocks is 1.7-2.0m in return heading and 1.1-1.3 m in going headway. And their surrounding rocks belong to the Ⅳ-type soften rock and the Ⅲ-type common surrounding rock respectively. Therefore, under the movable abutment pressure, the gateways deformation is serious. It is suggested that the designed gateways have to use pre-broadened cross section to suit their deformation. At the same time, the accumulated water on gateway floor must be drained in time. These measures weretaken in the 1302 and 1304 coal faces in Gengcun Colliery, and the satisfactory results have been obtained. |
| 关 键 词： | 煤层通道 固有平衡 梯形支撑 金属支架 岩层变形 软地基 |
Control over Surrounding Rocks Deformation of Soft Floor and Whole-Coal Gateways with Trapezoidal Supports |
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| ZHAI Xin-xian,LI De-quan,SHAO Qiang,Sun Yu-feng. Control over Surrounding Rocks Deformation of Soft Floor and Whole-Coal Gateways with Trapezoidal Supports[J]. Journal of China University of Mining and Technology, 2005, 15(2): 118-123 | |
| Authors: | ZHAI Xin-xian LI De-quan SHAO Qiang Sun Yu-feng |
| Affiliation: | 1. Department of Resource and Material Engineering, Henan Polytechnic University, Jaozuo, Henan 454000, China 2. Changcun Colliery, Yima Coal Group Co. Ltd., Sanmenxia, Henan 472300, China 3. Department of Social Science, Shandong Institute of Business and Technology, Yantai, Shangdong 264005, China |
| Abstract: | In Gengcun Colliery, Yima Coal Group Co. Ltd.the characteristics of the gateways of thick coal seam and the coal seam is with fully mechanized sublevel caving mining are that the thickness of roof coal seam of gateways is larger, their surrounding rocks are the whole-coal mass and the coal seam is prone to Spontaneous Combustion. With the natural equilibrium arch theory, the reasonable adjacent distance of No.11 mine-type metal supports was calculated in trapezoidal gateways based on these characteristics. Then, in-situ supporting experiments were carried out. The results indicate that under the action of virgin rock stress, the width of broken rocks zone of surrounding rocks is 1.7-2.0 m in return heading and 1.1-1.3 m in going headway. And their surrounding rocks belong to the Ⅳ-type soften rock and the Ⅲ-type common surrounding rock respectively. Therefore, under the movable abutment pressure, the gateways deformation is serious. It is suggested that the designed gateways have to use pre-broadened cross section to suit their deformation. At the same time, the accumulated water on gateway floor must be drained in time. These measures were taken in the 1302 and 1304 coal faces in Gengcun Colliery, and the satisfactory results have been obtained. |
| Keywords: | whole-coal gateway gateway the natural equilibrium arch theory trapezoidal support |
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