Citation: | YANG Dequn,ZHANG Xiangyang,DUAN Yungang,et al. Analysis of the stability of the roadway surrounding rock affected by mining in the close undermined coal seam[J]. China Mining Magazine,2024,33(9):119-129. DOI: 10.12075/j.issn.1004-4051.20240498 |
Aiming at the problems of deformation and destabilization of the upper track roadway and poor stability of the roadway surrounding rock affected by mining in the close undermined coal seam. This paper takes the south flank track “Y”-type roadway about 12 m above the 14148 working face of in the north area of Zhangji Coal Mine as the engineering background, and analyzes the layer relationship between the roadway and the working face by using the empirical formula of “vertical three belts”. This paper adopts the method of numerical simulation combined with on-site practice to study the stress distribution characteristics and displacement evolution law of the overburden roadway in the process of mining back to the close undermined coal seam, and determines the key support parts of the roadway. The results show that the overburden roadway is under the influence of overburden fissure zone, the surrounding rock stress is affected by the concentration of over-support pressure in the working face, showing the trend of increasing and then decreasing sharply, the surrounding rock is asymmetric deformation, and the deformation rate with the advancement of the working face show a three-stage law, the deep part of the roof show a gradual increase and then a smooth trend, and the shallow part of the layer shows a trend of increasing and then decreasing. On this basis, the pre-mining anchor cable pre-reinforcement + post-mining U-shaped shed “reinforcement” roadway support technology is proposed. Numerical simulation comparison results show that after the reinforcement support, the stress of the two gangs of the roadway has increased by 9 MPa, the top plate subsidence has been reduced by 103 mm, and the displacement of the weak points of the roadway has been greatly reduced, and the effect of the reinforcement support control is remarkable. The measured results show that the support scheme can effectively control the deformation of roadway surrounding rock and ensure the safety of mine production.
[1] |
刘建宇, 卞涛, 呼天峰. 受多重采动影响的回采巷道顶板及矿压显现研究[J]. 中国矿业,2023,32(S1):333-336. doi: 10.12075/j.issn.1004-4051.20230431
LIU Jianyu, BIAN Tao, HU Tianfeng. Study on the roof and ground pressure behavior of entry affected by multiple mining[J]. China Mining Magazine,2023,32(S1):333-336. doi: 10.12075/j.issn.1004-4051.20230431
|
[2] |
方新秋, 何杰, 何加省. 深部高应力软岩动压巷道加固技术研究[J]. 岩土力学,2009,30(6):1693-1698. doi: 10.3969/j.issn.1000-7598.2009.06.029
FANG Xinqiu, HE Jie, HE Jiasheng. Research on reinforced technology for deep soft rock and dynamic pressurized roadway under high stress[J]. Rock and Soil Mechanics,2009,30(6):1693-1698. doi: 10.3969/j.issn.1000-7598.2009.06.029
|
[3] |
吕情绪, 曹军, 高亮. 重复采动回采巷道变形机理及稳定控制[J]. 中国矿业,2023,32(5):96-103. doi: 10.12075/j.issn.1004-4051.2023.05.020
LYU Qingxu, CAO Jun, GAO Liang. Deformation mechanism and stability control of repeated mining roadway[J]. China Mining Magazine,2023,32(5):96-103. doi: 10.12075/j.issn.1004-4051.2023.05.020
|
[4] |
冯廷灿, 邹德均, 周诗建. 动压影响下留窄煤柱沿空掘巷围岩控制技术[J]. 煤矿安全,2018,49(3):87-90, 94.
FENG Tingcan, ZOU Dejun, ZHOU Shijian. Surrounding rock control technology of narrow coal pillar gob-side entry driving under dynamic pressure[J]. Safety in Coal Mines,2018,49(3):87-90, 94.
|
[5] |
李建波. 复合顶板动压巷道围岩应力演化和支护技术研究[J]. 中国矿业,2019,28(12):110-115. doi: 10.12075/j.issn.1004-4051.2019.12.021
LI Jianbo. Study on stress evolution and supporting technology of surrounding rock of the dynamic pressure roadway with combined roof[J]. China Mining Magazine,2019,28(12):110-115. doi: 10.12075/j.issn.1004-4051.2019.12.021
|
[6] |
刘刚, 杨沛基. 特厚煤层强动压巷道围岩控制技术研究[J]. 中国矿业,2023,32(8):139-144. doi: 10.12075/j.issn.1004-4051.20230572
LIU Gang, YANG Peiji. Research on surrounding rock control technology for strong dynamic pressure tunnel in extra thick coal seams[J]. China Mining Magazine,2023,32(8):139-144. doi: 10.12075/j.issn.1004-4051.20230572
|
[7] |
单仁亮, 黄博, 燕发源, 等. 中兴矿沿空留巷工作面矿压显现规律研究[J]. 煤炭工程,2015,47(12):74-77.
SHAN Renliang, HUANG Bo, YAN Fayuan, et al. Study on mine pressure behaviors of gob-side entry retaining working face in Zhongxing Mine[J]. Coal Engineering,2015,47(12):74-77.
|
[8] |
范明建, 林健, 赵忠证, 等. 深井厚煤层坚硬顶板强动压巷道围岩控制技术研究与应用[J]. 中国矿业,2020,29(2):106-111. doi: 10.12075/j.issn.1004-4051.2020.02.005
FAN Mingjian, LIN Jian, ZHAO Zhongzheng, et al. Study on surroundings control technology for thick coal-seam gateway with hard roof affected by intensive dynamic pressure in deep coal mine and its application[J]. China Mining Magazine,2020,29(2):106-111. doi: 10.12075/j.issn.1004-4051.2020.02.005
|
[9] |
李昂, 纪丙楠, 牟谦, 等. 深部煤岩层复合结构底板破坏机制及应用研究[J]. 岩石力学与工程学报,2022,41(3):559-572.
LI Ang, JI Bingnan, MOU Qian, et al. Failure mechanism of composite structure floors of deep coal and rock strata and its application[J]. Chinese Journal of Rock Mechanics and Engineering,2022,41(3):559-572.
|
[10] |
张清清. 断层破碎区动压巷道稳定性分析及支护参数优化[J]. 煤炭技术,2022,41(4):49-52.
ZHANG Qingqing. Analysis of dynamic pressure roadway stability and optimization of support parameters in fracture zone[J]. Coal Technology,2022,41(4):49-52.
|
[11] |
杨征, 丁彦雄, 高晓君. 基于切顶卸压技术的动压巷道力学响应破坏机制试验研究[J]. 煤矿安全,2021,52(7):47-53.
YANG Zheng, DING Yanxiong, GAO Xiaojun. Experimental study on mechanical response failure mechanism of dynamic pressure roadway based on roof cutting and pressure releasing technology[J]. Safety in Coal Mines,2021,52(7):47-53.
|
[12] |
何杰. 强动压煤体性质劣化下巷道位置与围岩控制技术研究[J]. 中国矿业,2020,29(12):121-128. doi: 10.12075/j.issn.1004-4051.2020.12.027
HE Jie. Study on coal pillar position and surrounding rock control technology under strong dynamic pressure and coal body degradation[J]. China Mining Magazine,2020,29(12):121-128. doi: 10.12075/j.issn.1004-4051.2020.12.027
|
[13] |
马振通. 回采工作面动压区U型钢支护托棚加固技术[J]. 煤矿安全,2017,48(9):89-91.
MA Zhentong. Reinforcement technology of U type steel support shed in mining face of dynamic pressure area[J]. Safety in Coal Mines,2017,48(9):89-91.
|
[14] |
WANG R, ZENG F, LI L. Stability analyses of side-exposed backfill considering mine depth and extraction of adjacent stope[J]. International Journal of Rock Mechanics and Mining Sciences,2021,142:104735. doi: 10.1016/j.ijrmms.2021.104735
|
[15] |
赵志强, 马念杰, 刘洪涛, 等. 巷道蝶形破坏理论及其应用前景[J]. 中国矿业大学学报,2018,47(5):969-978.
ZHAO Zhiqiang, MA Nianjie, LIU Hongtao, et al. A butterfly failure theory of rock mass around roadway and its application prospect[J]. Journal of China University of Mining & Technology,2018,47(5):969-978.
|
[16] |
袁越, 王卫军, 袁超, 等. 深部矿井动压回采巷道围岩大变形破坏机理[J]. 煤炭学报,2016,41(12):2940-2950.
YUAN Yue, WANG Weijun, YUAN Chao, et al. Large deformation failure mechanism of surrounding rock for gateroad under dynamic pressure in deep coal mine[J]. Journal of China Coal Society,2016,41(12):2940-2950.
|
[17] |
何富连, 张广超. 大断面采动剧烈影响煤巷变形破坏机制与控制技术[J]. 采矿与安全工程学报,2016,33(3):423-430.
HE Fulian, ZHANG Guangchao. Deformation and failure mechanism and control technology of large section coal roadway subjected to severe mining dynamic load[J]. Journal of Mining & Safety Engineering,2016,33(3):423-430.
|
[18] |
郭玉, 郑西贵, 郭罡业, 等. 近距离跨采软岩巷道围岩变形破坏控制研究[J]. 采矿与安全工程学报,2018,35(6):1142-1149.
GUO Yu, ZHENG Xigui, GUO Gangye, et al. Study on deformation failure and control of surrounding rock in soft rock roadway in close range coal seam with overhead mining[J]. Journal of Mining and Safety Engineering,2018,35(6):1142-1149.
|
[19] |
赵洪宝, 程辉, 吉东亮, 等. 近距离煤层回采巷道非对称性破坏机理与演化规律研究[J]. 中国矿业大学学报,2021,50(6):1029-1040, 1050. doi: 10.3969/j.issn.1000-1964.2021.6.zgkydxxb202106002
ZHAO Hongbao, CHENG Hui, JI Dongliang, et al. Study of the mechanism and evolution law of unsymmetrical failure of the mining roadway in close distance coal seam[J]. Journal of China University of Mining & Technology,2021,50(6):1029-1040, 1050. doi: 10.3969/j.issn.1000-1964.2021.6.zgkydxxb202106002
|
[20] |
黄学满. 煤矿采场“竖三带”的确定方法及应用[J]. 煤炭科学技术,2013,41(S2):48-50.
HUANG Xueman. Application and dertermination method of vertical three regions of working face[J]. Coal Science and Technology,2013,41(S2):48-50.
|
[21] |
张磊. FLAC3D中采场采空区的处理方法探讨[J]. 山西焦煤科技,2017,41(11):26-30. doi: 10.3969/j.issn.1672-0652.2017.11.008
ZHANG Lei. Discussion on treatment method of goaf with FLAC3D software[J]. Shanxi Coking Coal Science & Technology,2017,41(11):26-30. doi: 10.3969/j.issn.1672-0652.2017.11.008
|
[22] |
童治鹏, 张向阳, 邓秘. 深埋切顶自成巷道二次复用围岩稳定性研究[J]. 地下空间与工程学报,2024,20(1):320-328.
TONG Zhipeng, ZHANG Xiangyang, DENG Mi. Study on stability of secondary reused surrounding rock of self-forming roadway with large buried depth and roof cutting[J]. Chinese Journal of Underground Space and Engineering,2024,20(1):320-328.
|