| 软弱厚煤层沿空留巷变形破坏特征及控制研究 |
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| 引用本文： | 王凯,杨宝贵,王鹏宇,李冲.软弱厚煤层沿空留巷变形破坏特征及控制研究[J].岩土力学,2022,43(7):1913-1924. |
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| 作者姓名： | 王凯 杨宝贵 王鹏宇 李冲 |
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| 作者单位： | 1. 中国矿业大学（北京） 能源与矿业学院，北京 100083；2. 山西潞安矿业（集团）有限责任公司 古城煤矿，山西 长治 046100；
3. 中国矿业大学 矿业工程学院，江苏 徐州 221116 |
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| 基金项目： | 国家自然科学基金项目(No.51874277)~~； |
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| 摘 要： | 针对软弱厚煤层综放开采沿空留巷动压显现明显，顶板易出现不均匀切顶下沉等问题。通过现场调研、理论分析和数值模拟，阐明了软弱厚煤层综放开采沿空留巷动压显现特征和变形机制，提出了软弱厚煤层沿煤层顶板布置沿空留巷变形协同支护体系。研究结果表明：综放开采采出厚度大，沿煤层底板留巷时沿空留巷煤层顶板承载能力差，“底板?巷旁支护体?顶板”支护体系载能力不协调，是造成软弱厚煤层沿空留巷产生大变形的主要原因；沿煤层顶板留巷变形协同支护体系的提出提高了沿空留巷帮部、顶底板及巷旁支护体的协同承载能力，可有效地保证软弱厚煤层沿空留巷的围岩稳定。研究成果在古城煤矿的成功应用，证明了该支护体系在软弱厚煤层综放沿空留巷中的可行性。
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| 关 键 词： | 软弱厚煤层 沿空留巷 巷旁支护 协同变形 |
| 收稿时间： | 2021-10-15 |
| 修稿时间： | 2022-04-26 |
Deformation and failure characteristics of gob-side entry retaining in soft and thick coal seam and the control technology |
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| WANG Kai,YANG Bao-gui,WANG Peng-yu,LI Chong.Deformation and failure characteristics of gob-side entry retaining in soft and thick coal seam and the control technology[J].Rock and Soil Mechanics,2022,43(7):1913-1924. |
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| Authors: | WANG Kai YANG Bao-gui WANG Peng-yu LI Chong |
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| Institution: | 1. School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; 2. Gu-cheng Coal Mine of Shanxi Lu’an Mining Group, Changzhi, Shanxi 046100, China; 3. School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China |
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| Abstract: | In order to solve the problems of the obvious dynamic pressure, roof cutting subsidence and large deformation of the gob-side entry retaining in soft and thick coal seam fully-mechanized top-coal caving mining. The dynamic pressure characteristics and deformation mechanism of gob-side entry retaining are clarified, through field investigation, theoretical analysis and numerical simulation. A deformation coordinated support system of gob-side entry retaining arranged along the roof of soft and thick coal seam is proposed. The results show that the mining thickness of fully-mechanized top-coal caving mining is large, when retaining the gob-side entry along the coal seam floor, the bearing capacity of the coal roof is poor and the bearing capacity between the floor, gob-side entry filling body and roof support system is uncoordinated, which are the main reasons for the obvious dynamic pressure and large deformation of the gob-side entry retaining in the soft and thick coal seam. The proposal of the deformation coordinated support system in gob-side entry retaining along coal seam roof improves the coordinated bearing capacity of the coal wall, roof, floor and gob-side entry filling body, which can effectively ensure the stability of surrounding rock in the soft and thick coal seam gob-side entry retaining. The successful application of the research results to Gu-cheng Coal Mine proves the feasibility of the support system in soft and thick coal seam fully-mechanized coal caving mining gob-side entry retaining. |
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| Keywords: | soft and thick coal seam gob-side entry retaining roadway side support coordinated deformation |
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