大巷煤柱工作面过空巷矿压规律及控制技术

李振华, 任梓源, 杜锋, 任浩, 王文强

李振华,任梓源,杜锋,等. 大巷煤柱工作面过空巷矿压规律及控制技术[J]. 煤田地质与勘探,2024,52(10):141−152. DOI: 10.12363/issn.1001-1986.24.05.0316
引用本文: 李振华,任梓源,杜锋,等. 大巷煤柱工作面过空巷矿压规律及控制技术[J]. 煤田地质与勘探,2024,52(10):141−152. DOI: 10.12363/issn.1001-1986.24.05.0316
LI Zhenhua,REN Ziyuan,DU Feng,et al. Evolutionary pattern and control technology of mine pressure when mining face for coal pillars in main roadways passing through abandoned roadways[J]. Coal Geology & Exploration,2024,52(10):141−152. DOI: 10.12363/issn.1001-1986.24.05.0316
Citation: LI Zhenhua,REN Ziyuan,DU Feng,et al. Evolutionary pattern and control technology of mine pressure when mining face for coal pillars in main roadways passing through abandoned roadways[J]. Coal Geology & Exploration,2024,52(10):141−152. DOI: 10.12363/issn.1001-1986.24.05.0316

 

大巷煤柱工作面过空巷矿压规律及控制技术

基金项目: 国家自然科学基金面上项目(52174073,52274079);河南省自然科学基金杰出青年项目(222300420007);河南省高校科技创新团队支持计划项目(23IRTSTHN005)
详细信息
    作者简介:

    李振华,1979年生,男,山东金乡人,博士,教授,博士生导师。E-mail:lizh@hpu.edu.cn

    通讯作者:

    杜锋,1984年生,男,安徽合肥人,博士,副教授。E-mail:fdu_cumt@126.com

  • 中图分类号: TD353

Evolutionary pattern and control technology of mine pressure when mining face for coal pillars in main roadways passing through abandoned roadways

  • 摘要:
    目的 

    由于矿井工作面布置方式的调整,煤柱工作面经常会面临通过废弃巷道时覆岩顶板难以控制的情况。

    方法 

    为解决这一问题,以河南赵固二矿二盘区外侧煤柱工作面过空巷为工程背景,采用理论分析、数值模拟和现场试验等方法,研究工作面与空巷覆岩破断组合结构,模拟不同支护强度下顶板应力−位移全周期演化规律,分析工作面矿压显现特征,提出相应的控制技术。

    结果和结论 

    结果表明,基本顶不同破断形式对矿压显现特征影响显著,关键块断裂位置可分为煤柱上方、空巷上方和实体煤上方3种类型。通过建立工作面过空巷力学模型,研究基本顶超前破断力学机理,基本顶受到空巷−煤柱−工作面支护系统支撑作用,形成“砌体梁”稳定承载结构,判定基本顶滑落失稳时空巷支护强度的临界值为4.6 MPa。数值模拟显示,工作面超前支承压力与空巷应力集中产生的叠加效应对煤柱影响显著,当工作面推进至距空巷5 m时,煤柱失稳破坏,基本顶易发生超前破断。在工作面过空巷过程中,煤柱超前支承压力分布特征由“双峰型”转变为“孤峰型”。不同支护强度下的顶板应力分布特征存在明显差异,确定空巷支护强度为4.5 MPa能够防止基本顶超前破断。最后,在研究区二盘区外侧煤柱工作面采用“锚网索”支护方式对空巷顶板进行补强支护,过空巷期间液压支架工作阻力在研究区域处于安全范围内,未发生顶板垮落和压架等事故,解决了二盘区外侧煤柱工作面过空巷技术难题,可为类似工作面提供参考依据。

    Abstract:
    Objective 

    With the adjustment of the mining face layout in mines, the overburden roof of the mining face for coal pillar recovery is frequently difficult to control when the mining face passes through abandoned roadways.

    Methods 

    To address this challenge, this study investigated the coal pillar mining face outside the No.2 panel in the Zhaogu No.2 Coal Mine in Henan Province, which passes through abandoned roadways. Using methods like theoretical analysis, numerical simulation, and in-situ tests, this study examined the composite structure of the mining face and the broken overburden of abandoned roadways, followed by simulation of the full-cycle evolutionary patterns of the stress and displacement of the mining face roof under different support strengths. Finally, it analyzed the mine pressure behavior on the mining face and proposed corresponding control technology.

    Results and Conclusions 

    The results indicate that the breaking forms of the main roof significantly influenced the mine pressure behavior. The breaking of its key blocks might occur above the coal pillar, abandoned roadway, or solid coal. The mechanical mechanisms underlying the advance breaking of the main roof were explored using the established mechanical models of the mining face passing through an abandoned roadway. The main roof was found to be supported by the support system consisting of the abandoned roadway, coal pillar, and mining face, which formed a stable bearing structure in the form of a masonry beam. The critical support strength of the abandoned roadway in the case of the sliding instability of the main roof was determined at 4.6 MPa. The numerical simulation results indicate that the superimposed effects of the advance support pressure of the mining face and the stress concentration in the abandoned roadway significantly affected the coal pillar. As the mining face advanced to 5 m away from the abandoned roadway, the coal pillar experienced instability failure, and the main roof was prone to undergo advance breaking. When the mining face passed through the abandoned roadway, the advance support pressure of the coal pillar shifted from the bimodal to unimodal distribution. The roof stress exhibited varying distribution characteristics under different support strengths, and it was discovered that the support strength of 4.5 MPa of the abandoned roadway could prevent the advance breaking of the main roof. For the coal pillar mining face outside the No.2 panel in the study area, cable anchors were employed as the reinforced support of the abandoned roadway roofs. Consequently, when the mining face passed through the abandoned roadways, the working resistance of hydraulic supports fell within the safe range in the study area, avoiding accidents such as roof collapse and support crushing. This study addressed the technical challenges faced when the coal pillar mining face outside the No.2 panel passed through abandoned roadways, providing a reference for similar mining face.

  • 图  1   工作面位置及附近钻孔柱状图

    Fig.  1   Mining face location and stratigraphic column in nearby borehole

    图  2   基本顶破断力学模型

    Fig.  2   Mechanical model for the breaking of the main roof

    图  3   基本顶断裂不同位置

    Fig.  3   Different locations of the main roof breaking

    图  4   关键块B力学模型

    Fig.  4   Mechanical model of key block B

    图  5   数值计算模型

    Fig.  5   Numerical calculation model

    图  6   无支护条件下空巷应力演化特征

    Fig.  6   Evolutionary characteristics of stress in the abandoned roadway without support

    图  7   煤层顶板应力演化规律

    Fig.  7   Evolutionary pattern of stress in coal seam roof

    图  8   不同支护强度下超前支承压力分布云图

    Fig.  8   Contour maps showing the distributions of advance support pressure under different support strengths

    图  9   工作面方向超前支承压力分布

    Fig.  9   Distribution of advance support pressure in the mining face direction

    图  10   位移测点布置

    Fig.  10   Layout of displacement measuring points

    图  11   顶板下沉量和支护强度关系拟合曲线

    Fig.  11   Fitted curves showing the relationship between roof subsidence and support strength

    图  12   巷道原有支护参数

    Fig.  12   Original parameters of the roadway support

    图  13   巷道加强支护方案

    Fig.  13   Scheme for reinforced roadway support

    图  14   支架位置

    Fig.  14   Support locations

    图  15   不同位置液压支架工作阻力

    Fig.  15   Working resistance of hydraulic supports at different locations

    表  1   模型岩层及物理力学参数

    Table  1   Physico-mechanical parameters and rock layers in the model

    层号 岩层名称 厚度/m 密度/(kg·m−3) 体积模量/GPa 剪切模量/GPa 黏聚力/MPa 内摩擦角/(°) 抗拉强度/MPa
    1 砂质泥岩 11 2510 14.1 8.5 4.30 33 3.5
    2 泥岩 2 2420 9.8 7.1 2.70 31 1.8
    3 中粒砂岩 1 2580 12.3 6.1 8.50 35 1.7
    4 砂质泥岩 6 2510 13.4 9.0 4.20 35 3.5
    5 中粒砂岩 3 2580 12.5 6.1 8.30 36 1.6
    6 砂质泥岩 6 2510 13.6 9.1 4.12 34 3.2
    7 细粒砂岩 3 2800 18.3 9.3 6.50 30 2.3
    8 砂质泥岩 9 2510 13.2 8.6 4.40 35 3.3
    9 细粒砂岩 2 2800 18.3 9.3 6.50 30 2.3
    10 砂质泥岩 6 2510 13.2 8.6 4.40 35 3.3
    11 粉砂岩 2 2640 18.0 10.2 6.00 30 2.1
    12 砂质泥岩 14 2510 13.5 9.3 4.15 34 3.1
    13 1 6 1500 7.5 3.8 1.60 27 1.3
    14 砂质泥岩 7 2510 13.2 9.0 4.12 35 3.0
    下载: 导出CSV
  • [1] 张文杰,何满潮,王炯,等. 逆断层影响下无煤柱自成巷矿压规律及围岩控制[J]. 煤田地质与勘探,2023,51(5):1−10. DOI: 10.12363/issn.1001-1986.22.11.0850

    ZHANG Wenjie,HE Manchao,WANG Jiong,et al. Application of pillar-free self-formed roadway technology under the influence of reserse faults:Strata behavior law and surrounding rock control[J]. Coal Geology & Exploration,2023,51(5):1−10. DOI: 10.12363/issn.1001-1986.22.11.0850

    [2] 孟巧荣,王慧娴,王朋飞,等. 深埋倾斜特厚煤层窄煤柱护巷机理与围岩控制[J]. 煤炭科学技术,2024,52(3):38−52.

    MENG Qiaorong,WANG Huixian,WANG Pengfei,et al. Gateroad protection mechanism and surrounding rock control for gob-side entry with slender pillar in deep and inclined extra-thick coal seams[J]. Coal Science and Technology,2024,52(3):38−52.

    [3] 彭林军,吴家遥,何满潮,等. 深部特厚煤层综放沿空掘巷煤柱优化及巷道支护[J]. 西安科技大学学报,2024,44(3):563−574.

    PENG Linjun,WU Jiayao,HE Manchao,et al. Optimization of coal pillar and tunnel support for fully mechanized caving along gob in deep and extra thick coal seams[J]. Journal of Xi’an University of Science and Technology,2024,44(3):563−574.

    [4] 刘江斌,刘晓刚,刘茂福,等. 榆神矿区多层厚硬顶板强矿压显现及覆岩破断运动规律研究[J]. 中国煤炭,2024,50(4):46−56.

    LIU Jiangbin,LIU Xiaogang,LIU Maofu,et al. Study on strong mine pressure behavior and overburden fracture movement law of multi-layer thick and hard roof in Yushen mining area[J]. China Coal,2024,50(4):46−56.

    [5] 尹超宇,冯光明,高鹏,等. 工作面过空巷围岩失稳机理研究[J]. 采矿与安全工程学报,2018,35(3):457−464.

    YIN Chaoyu,FENG Guangming,GAO Peng,et al. Research on instability mechanism of surrounding rock in stage of working face passing abandoned roadway[J]. Journal of Mining & Safety Engineering,2018,35(3):457−464.

    [6] 陈志维,张彦董. 窄煤柱沿空掘巷围岩稳定协同控制技术研究与应用[J]. 矿业安全与环保,2023,50(1):65−70.

    CHEN Zhiwei,ZHANG Yandong. Research and application of coordinated control technology for surrounding rock stability of gob-side entry driving with narrow coal pillar[J]. Mining Safety & Environmental Protection,2023,50(1):65−70.

    [7] 许家林,鞠金峰. 特大采高综采面关键层结构形态及其对矿压显现的影响[J]. 岩石力学与工程学报,2011,30(8):1547−1556.

    XU Jialin,JU Jinfeng. Structural morphology of key stratum and its influence on strata behaviors in fully-mechanized face with super-large mining height[J]. Chinese Journal of Rock Mechanics and Engineering,2011,30(8):1547−1556.

    [8] 徐青云,宁掌玄,朱润生,等. 综放工作面充填过空巷顶板失稳机理及控顶研究[J]. 采矿与安全工程学报,2019,36(3):505−512.

    XU Qingyun,NING Zhangxuan,ZHU Runsheng,et al. Study on instability mechanism and top control of overfilled roof in fully mechanized caving face[J]. Journal of Mining & Safety Engineering,2019,36(3):505−512.

    [9] 刘畅,张俊文,杨增强,等. 工作面过空巷基本顶超前破断机制及控制技术[J]. 岩土力学,2018,39(4):1411−1421.

    LIU Chang,ZHANG Junwen,YANG Zengqiang,et al. Mechanism of advance fracture of main roof and its control technology when workface crossing abandoned roadway[J]. Rock and Soil Mechanics,2018,39(4):1411−1421.

    [10] 刘畅,杨增强,弓培林,等. 工作面过空巷基本顶超前破断压架机理及控制技术研究[J]. 煤炭学报,2017,42(8):1932−1940.

    LIU Chang,YANG Zengqiang,GONG Peilin,et al. Mechanism and control technology of supports crushing induced by main roof’s breaking ahead of workface when crossing abandoned roadway[J]. Journal of China Coal Society,2017,42(8):1932−1940.

    [11] 刘畅,弓培林,王开,等. 复采工作面过空巷顶板稳定性[J]. 煤炭学报,2015,40(2):314−322.

    LIU Chang,GONG Peilin,WANG Kai,et al. Roof stability for repeated mining workface passing through abandoned parallel gateway[J]. Journal of China Coal Society,2015,40(2):314−322.

    [12] 赵文光,解振华. 基于3DEC的过空巷群采动来压突显特征模拟研究[J]. 煤炭科学技术,2022,50(增刊1):54−58.

    ZHAO Wenguang,XIE Zhenhua. Simulation study on the salient characteristics of mining-induced pressure in goaf group based on 3DEC[J]. Coal Science and Technology,2022,50(Sup.1):54−58.

    [13] 谢生荣,李世俊,魏臻,等. 综放工作面过空巷时支架−围岩稳定性控制[J]. 煤炭学报,2015,40(3):502−508.

    XIE Shengrong,LI Shijun,WEI Zhen,et al. Stability control of support-surrounding rock system during fully mechanized caving face crossing abandoned roadway period[J]. Journal of China Coal Society,2015,40(3):502−508.

    [14] 周海丰,黄庆享. 大采高工作面过空巷群顶板破断及矿压规律研究[J]. 煤炭科学技术,2020,48(2):70−79.

    ZHOU Haifeng,HUANG Qingxiang. Study on the law of roof breakage and mine pressure passing large cross-section gob group in the fully-mechanized face with high mining height[J]. Coal Science and Technology,2020,48(2):70−79.

    [15] 高海滨,侯可可,王兆其,等. 极近距离煤层采空区下沿空留巷技术研究[J]. 中国煤炭,2024,50(4):68−78.

    GAO Haibin,HOU Keke,WANG Zhaoqi,et al. Research on technology of gob-side entry retaining under goaf in extremely close distance coal seam[J]. China Coal,2024,50(4):68−78.

    [16] 王军,解振华. 浅埋工作面过空巷煤基混凝土墩柱支护研究与应用[J]. 中国煤炭,2023,49(增刊2):226−232.

    WANG Jun. Research and application of coal-based concrete pier column support in shallow-buried mining face[J]. China Coal,2023,49(Sup.2):226−232.

    [17] 段计伟. 窄煤柱沿空掘巷非对称支护力学特征与支护参数研究[J]. 矿业安全与环保,2024,51(1):147−153.

    DUAN Jiwei. Study on mechanical characteristics and supporting parameters of asymmetric support in gob-side entry driving with narrow coal pillar[J]. Mining Safety & Environmental Protection,2024,51(1):147−153.

    [18] 谢学斌,李德玄,孔令燕. 基于弹性薄板理论的矿壁稳定性分析模型及应用[J]. 采矿与安全工程学报,2020,37(4):698−706.

    XIE Xuebin,LI Dexuan,KONG Lingyan. Stability analysis model of ore wall based on elastic thin plate theory and its application[J]. Journal of Mining & Safety Engineering,2020,37(4):698−706.

    [19] 邵春瑞,李俊清,赵宝友. 综放工作面过密集空巷群高水充填技术研究及应用[J]. 煤炭工程,2022,54(6):57−63.

    SHAO Chunrui,LI Junqing,ZHAO Baoyou. High water filling technology for fully mechanized top-coal caving face crossing close-set abandoned roadway groups[J]. Coal Engineering,2022,54(6):57−63.

    [20] 钱鸣高,许家林. 煤炭工业发展面临几个问题的讨论[J]. 采矿与安全工程学报,2006,23(2):127−132. DOI: 10.3969/j.issn.1673-3363.2006.02.001

    QIAN Minggao,XU Jialin. Discussion of several issues concerning the development of coal industry in China[J]. Journal of Mining & Safety Engineering,2006,23(2):127−132. DOI: 10.3969/j.issn.1673-3363.2006.02.001

    [21] 冯强,刘炜炜,伏圣岗,等. 基于弹性地基梁采场坚硬顶板变形与内力的解析计算[J]. 采矿与安全工程学报,2017,34(2):342−347.

    FENG Qiang,LIU Weiwei,FU Shenggang,et al. Analytical solution for deformation and internal force of hard roof in stope based on elastic foundation beam[J]. Journal of Mining & Safety Engineering,2017,34(2):342−347.

    [22] 刘雨涛,李其振,王鹏伟. 高瓦斯突出煤层原位充填沿空留巷技术研究[J]. 矿业安全与环保,2020,47(1):45−50.

    LIU Yutao,LI Qizhen,WANG Pengwei. Study on gob-side entry retaining technology of in situ filling in high gassy outburst coal seam[J]. Mining Safety & Environmental Protection,2020,47(1):45−50.

    [23] 刘迅. 沿空巷道侧采空区上方基本顶断裂位置研究[J]. 矿业安全与环保,2017,44(5):40−44. DOI: 10.3969/j.issn.1008-4495.2017.05.010

    LIU Xun. Study on fracture position of main roof above gob-side entry[J]. Mining Safety & Environmental Protection,2017,44(5):40−44. DOI: 10.3969/j.issn.1008-4495.2017.05.010

    [24] 钱鸣高,石平五,许家林. 矿山压力与岩层控制[M]. 徐州:中国矿业大学出版社,2010.
  • 期刊类型引用(1)

    1. 王羽扬,李剑,李元林,张勇,刘勇,张毅,韩连昌. 岩溶区顶板沉降特点及覆岩裂隙分形维数变化研究. 采矿与安全工程学报. 2023(04): 679-690 . 百度学术

    其他类型引用(4)

图(15)  /  表(1)
计量
  • 文章访问数:  84
  • HTML全文浏览量:  5
  • PDF下载量:  26
  • 被引次数: 5
出版历程
  • 收稿日期:  2024-05-13
  • 修回日期:  2024-08-07
  • 录用日期:  2024-10-24
  • 刊出日期:  2024-10-24

目录

    /

    返回文章
    返回