| 采动底板力学特征及其对回采巷道稳定性影响 |
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| 引用本文： | 李家卓,马海峰,殷志强,李传明,李佳佳.采动底板力学特征及其对回采巷道稳定性影响[J].中国安全生产科学技术,2014(3):18-23. |
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| 作者姓名： | 李家卓 马海峰 殷志强 李传明 李佳佳 |
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| 作者单位： | [1]安徽理工大学深部煤矿采动响应与灾害防控安徽省重点实验室,安徽淮南232001; [2]中国矿业大学北京资源与安全工程学院,北京100083; [3]淮南矿业集团张集煤矿,安徽淮南232174 |
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| 基金项目： | 国家自然科学基金青年科学基金项目（51304007） |
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| 摘 要： | 应用理论分析、计算机模拟和现场实测,分析了采动底板应力传播规律及其对底板巷道稳定性影响规律。研究表明:煤壁前方应力增高区附近底板压应力分布呈现"球根"状,随着埋深的增加,垂直应力先增加后减小,剪应力浅部采场边界高度集中,是引起层状底板剪切滑移的根本原因。张集矿1113(1)工作面回采过程,活化了已回采稳定的两工作面层间似连续-非连续-散体结构,导致非连续结构的剪切滑移失稳,和散体冲破相互咬合摩擦力的移动,引起了1113(1)工作面轨道巷广距离失稳。相邻采区开采顺序由上下煤层间隔同采调整为上下煤层顺序开采后,巷道表面位移显著降低,技术经济效益显著。研究成果可为煤层群开采采区设计、底板巷道稳定性控制提供理论基础。
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| 关 键 词： | 采动底板 力学特征 底板巷道 |
Mechanical characteristics of mining floor and the influence to mining roadway stability |
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| Affiliation: | LI Jia-zhuo , MA Hai-feng, YIN Zhi-qiang , LI Chuan-ming , LI Jia-jia ( 1. Anhui Province Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine, Anhui University of Science and Technology, Huainan Anhui 232001, China;2. Faculty of Resources and Safety Engineering, China University of Mining andTechnology (Beijing), Beijing 100083, China;3. Zhangii Mine,Huainan Mining Group Co., Huainan Anhui 232174, China) |
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| Abstract: | The stress propagation law and and the influence to mining roadway stability were analyzed by usmg me integrated research methods of numerical simulation, field measurement and theoretical analysis. It showed that the pressure stress presented the bulb shape in stress-concentrated area in front of the coal wall. Pressure stress first in- creased then decreased, and shear stress highly concentrated in superficial part of stope boundary, which was the key of shear slip of layered slab. The recovery of 1113 （ 1 ） working face in Zhangji coal mine activated the stable rock formations between the two working face, which caused the instability of the shear slip of the discontinuous structure, granular movement counteracting force of friction, and was an important factor of 1113 （1） working face track roadway instability. After adjusting the mining sequence of adjacent mining area from the up seam mining and the low seam interval mining to top to bottom mining, the surface displacement of roadway reduced significantly, and obvious technical and economic benefit was obtained. The research results can provide theoretical basis for coal seam group mining area design and floor tunnel stability control. |
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| Keywords: | mining floor mechanical characteristics floor tunnel |
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