多层叠加煤柱覆岩结构特征及对下伏煤层矿压显现影响

doi:10.13722/j.cnki.jrme.2015.1497

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摘要

大同矿区侏罗系煤层群开采过程中遗留多类大型煤柱，其对下伏石炭系煤层矿压显现具有重要影响。通过比值判别法和极限平衡理论等方法，确定侏罗系地层遗留多层叠加煤柱覆岩可形成“倒梯形孤岛覆岩结构”，并建立“倒梯形孤岛覆岩结构”的力学模型，揭示不同尺寸“倒梯形孤岛覆岩结构”对下伏石炭系煤层影响的定量关系。分析表明，当煤柱体宽度在30～120 m范围时，“倒梯形孤岛覆岩结构”使石炭系煤层应力场较原岩应力提高了91%～259%，当叠加煤柱体宽度为80 m时对石炭系煤层影响最大。现场微震监测表明，石炭系煤层8104工作面在通过侏罗系大型重叠煤柱区域时，微震事件密集分布，微震事件能量级别较高(达到10⁶J)，理论分析和现场监测具有较好的一致性，研究成果可为石炭系煤层工作面通过侏罗系遗留大型叠加煤柱体时顶板管理、强矿压显现预测与控制等提供理论支持。

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	于斌1
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关键词 ：采矿工程, 大同矿区侏罗系煤层群, 多层叠加煤柱, 孤岛覆岩结构, 矿压显现

Abstract：

There are legacy many types of coal pillars during mining the Jurassic coal seams in Datong mining area，that have important influences on strata behavior of underlying carboniferous coal seam. The condition of forming inverted trapezoid island structure in overburden structure is determined by analyzing structural characteristics of legacy stacked coal pillars in Jurassic coal seams using the method of ratio discrimination for multi-coal seam mining and limit equilibrium theory，the mechanical model of inverted trapezoid island structure is established and the quantitative influence of different sizes of stacked coal pillars to the coal seam of underlying carboniferous is analyzed. The theoretical analysis shows that the inverted trapezoid island structure leads to the stress field of carboniferous coal seam increasing 91%–259% than in-situ stress field when the width of coal pillar is between 30–120 m，and the influence of inverted trapezoid island structure to carboniferous coal seam become maximum when the width of coal pillar is 80 m or so. The microseismic monitoring shows that the microseismic events have a large distribution density and with higher energy levels(10⁶J) when the 8104 working face of carboniferous coal seam through the area of stacked coal pillars. The theoretical analysis and field monitoring have good consistency and the research results can provide a theoretical support for the roof management and dynamic disaster prevention etc when Carboniferous coal seam through Jurassic legacy large coal pillar.

Key words： mining engineering Jurassic coal seams of Datong mining area multi-layer superimposed coal pillar island structure strata behaviors

引用本文:

于斌1，霍丙杰1，2. 多层叠加煤柱覆岩结构特征及对下伏煤层矿压显现影响[J]. 岩石力学与工程学报, 2017, 36(S1): 3374-3381.
YU Bin1，HUO Bingjie1，2. Structure characteristics of multi-layer superimposed coal pillar and its influence on strata behavior for underlying coal seam. , 2017, 36(S1): 3374-3381.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.1497 或 https://rockmech.whrsm.ac.cn/CN/Y2017/V36/IS1/3374

[1] 陆士良，姜耀东，孙永联. 巷道与上部煤层间垂距Z的选择[J]. 中国矿业大学学报，1993，22(1)：4–10.(LU Shiliang，JIANG Yaodong，SUN Yonglian. The selection of vertical distance Z between roadway and its upper coal seam[J]. Journal of China University of Mining and Technology，1993，22(1)：4–10.(in Chinese))

[2] 鞠金峰，许家林，朱卫兵，等. 近距离煤层工作面出倾向煤柱动载矿压机制研究[J]. 煤炭学报，2010，35(1)：15–19.(JU JinfengZHU Weibing，2010，35(1)：15–19.(in Chinese))

[3] 徐金海，缪协兴，张晓春. 煤柱稳定性的时间相关性分析[J]. 煤炭学报，2005，30(4)：433–437.(XU Jinhai，MIAO Xiexing，ZHANG Xiaochun. Analysis of the time-dependence of the coal pillar stability[J]. Journal of China Coal Society，2005，30(4)：433–437.(in Chinese))

[4] 黄炳香，刘长友，郑百生，等. 超长孤岛综放工作面煤柱支承压力分布特征研究[J]. 岩土工程学报，2007，29(6)：932–937.(HUANG Bingxiang，LIU Changyou，ZHEN Baisheng，et al. Distribution abutment pressures on laneway pillars for super wide isolated fully mechanized top coal caving face[J]. Chinese Journal of Geotechnical Engineering，2007，29(6)：932–937.(in Chinese))

[5] 王宏伟，姜耀东，赵毅鑫，等. 长壁孤岛工作面冲击失稳能量释放激增机制研究[J]. 岩石力学与工程学报，2013，32(11)：2 250– 2 257.(WANG Hongwei，JIANG Yaodong，ZHAO Yixin，et al. Investigation on mechanism of energy explosion during extraction of island longwall panel[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(11)：2 250–2 257.(in Chinese))

[6] 窦林名，何烨，张卫东. 孤岛工作面冲击矿压危险及其控制[J]. 岩石力学与工程学报，2003，22(11)：1 866–1 869.(DOU Linming，HE Ye，ZHANG Weidong. Hazards of rock burst in island coal face and its control[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1 866–1 869.(in Chinese))

[7] 曹安业，朱亮亮，李付臣，等. 厚硬岩层下孤岛工作面开采“T”型覆岩结构与动压演化特征[J]. 煤炭学报，2014，39(2)：328–335.(CAO AnyeLI Fuchen，2014，39(2)：328–335.(in Chinese))

[8] 李佃平，窦林名，牟宗龙，等. 孤岛边角煤柱工作面反弧形覆岩结构诱冲机制及其控制[J]. 煤炭学报，2012，37(5)：719–724.(LI Dianping，DOU Linming，MU Zonglong，et al. The anti-arc overlying strata structure induced mechanism and control of isolated corner coal pillar working face[J]. Journal of China Coal Society，2012，37(5)：719–724.(in Chinese))

[9] 刘长友，黄炳香，孟祥军，等. 超长孤岛综放工作面支承压力分布规律研究[J]. 岩石力学与工程学报，2007，26(增1)：2 761– 2 766.(LIU Changyou，HUANG Bingxiang，MENG Xiangjun，et al. Research on abutment pressure distribution law of overlength isolated fully-mechanized top coal caving face[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2 761–2 766.(in Chinese))

[10] 谢广祥，杨科，刘全明. 综放面倾向煤柱支承压力分布规律研究[J]. 岩石力学与工程学报，2006，25(3)：545–549.(XIE Guangxiang，YANG Ke，LIU Quanming. Study on distribution laws of stress in inclined coal pillar for fully-mechanized top-coal caving face[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：545–549.(in Chinese))

[11] 孟达，王家臣，王进学. 房柱式开采上覆岩层破坏与垮落机制[J]. 煤炭学报，2007，32(6)：577–580.(MENG DaWANG Jinxue. Mechanism on the failure and caving of roof strata in pillar and house mining[J]. Journal of China Coal Society，2007，32(6)：577–580.(in Chinese))

[12] MORTAZAVI A，HASSANI F P，SHABANI M. A numerical investigation of rock piller failure mechanism in underground openings[J]. Computer and Geotechnics，2009，36(5)：691–697.

[13] 张明，李克庆，姜福兴，等. 基于覆岩结构理论的冲击煤层孤岛工作面宽度研究[J]. 金属矿山，2016，(4)：62–66.(ZHANG Ming，LI Keqing，JIANG Fuxing，2016，(4)：62–66.(in Chinese))

[14] 潘俊峰. 半孤岛面全煤巷道底板冲击启动原理分析[J]. 煤炭学报，2011，36(增2)：332–338.(PAN Junfeng. Start-up principium of rock burst in whole coal roadway floor in half-island face[J]. Journal of China Coal Society，2011，36(Supp.2)：332–338.(in Chinese))

[15] 于斌，刘长友，杨敬轩，等. 大同矿区双系煤层开采煤柱影响下的强矿压显现机制[J]. 煤炭学报，2014，39(1)：40–46.(YU Bin，LIU Changyou，YANG Jingxuan，et al. Mechanism of strong pressure reveal under the influence of mining dual system of coal pillar in Datong mining area[J]. Journal of China Coal Society，2014，39(1)：40–46.(in Chinese))

[16] 张宏伟，朱志洁，霍利杰，等. 特厚煤层综放开采覆岩破坏高度[J]. 煤炭学报，2014，39(5)：816–821.(ZHANG HongweiHUO Lijie，2014，39(5)：816–821.(in Chinese))