| Citation: |
HOU Enke，MU Jiaxin，XIE Xiaoshen，et al. Developmental patterns and formation and evolutionary mechanisms of surface cracks induced by the mining of shallowly buried coal seams[J]. Coal Geology & Exploration，2025，53(2)：107−117. DOI: 10.12363/issn.1001-1986.24.05.0310
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Surface cracks are recognized as one of the most common geologic hazards in coal mining areas in northern Shaanxi Province. These cracks directly cause damage to surface ecosystems. Furthermore, those penetrating fractures in the overburden act as primary channels for surface water to burst underground, threatening the safe production underground.
This study aims to further reveal the developmental patterns of surface cracks induced by the mining of shallowly buried coal seams and elucidate their formation and evolutionary mechanisms. To this end, this study investigated mining face 15218 and 25213 in the Hongliulin Coal Mine in northern Shaanxi. Specifically, the surface cracks in the mining face were comprehensively examined using methods including surface crack mapping, dynamic monitoring of cracks, and numerical simulations.
The results indicate that the surface cracks caused by the mining of shallowly buried coal seams exhibited a C-shaped distribution overall. The developmental characteristics and locations of the surface cracks were closely related to landform types. Under the same mining conditions, the proportion of cracks with widths greater than 5 cm in areas with loess gullies was 2.15 times that in areas with sandy beaches, suggesting a significantly higher developmental degree of cracks in the former areas than in the latter areas. Besides, the boundary cracks of the mining face exhibited a significantly higher developmental degree than cracks within the mining face. Surface cracks induced by the mining of shallowly buried coal seams manifested two dynamic developmental characteristics: ahead of and lagging behind mining positions. Among them, the formation of surface cracks induced by mining along mining face 25213 lagged behind the mining position, with a lag distance of 6.49 m. In contrast, surface cracks induced by mining along mining face 15218 were formed ahead of the mining position, with a lead distance of 20.07 m. Cracks within the mining face exhibited four activity characteristics, while the boundary cracks only showed an activity characteristic of cracking, increase in length, and stability sequentially. The surface cracks exhibited overall activity time ranging from 4 days to 14 days. Compression zones, tension-compression transform zones, and tensile zones were formed near the surface of the goaves. As the mining face advanced, movement deformation and failure zones within the roof strata and on the surface constantly expanded forward. The surface subsidence-induced basins were slightly larger than the goaves, with a maximum subsidence coefficient of 0.82. Non-penetrating cracks were primarily formed when the tensile deformations of soils along the margins of surface moving basins exceeded their limited values. In contrast, penetrating cracks were formed by the connection between upgoing cracks within the overburden and surface cracks or by the direct connection between the upgoing cracks and the surface. As the mining of the mining face advanced, the cycle rupture of the main roofs caused the surface cracks to continuously expand forward. The characteristics of variations in the surface crack width were closely related to the complex movement of blocks on both sides of the cracks. The results of this study can serve as an important reference for the prevention and control of surface cracks in the mining areas of shallowly buried coal seams.
| [1] |
王云虎. 渭北煤田开采沉陷地表裂缝规律及其对地面建筑物的影响[J]. 陕西煤炭,1994(2):21−24.
WANG Yunhu. Surface crack law of mining subsidence in Weibei Coalfield and its influence on ground buildings[J]. Shaanxi Coal,1994(2):21−24.
|
| [2] |
范立民,马雄德,李永红,等. 西部高强度采煤区矿山地质灾害现状与防控技术[J]. 煤炭学报,2017,42(2):276−285.
FAN Limin,MA Xiongde,LI Yonghong,et al. Geological disasters and control technology in high intensity mining area of western China[J]. Journal of China Coal Society,2017,42(2):276−285.
|
| [3] |
张其胜,梁树雄,孙奋清. 地表裂缝导水性分析和导水区域研究[J]. 中国煤炭,2007,33(12):76−78. DOI: 10.3969/j.issn.1006-530X.2007.12.031
ZHANG Qisheng,LIANG Shuxiong,SUN Fenqing. Analysis of water conductivity of surface cracks and study of water conductivity area[J]. China Coal,2007,33(12):76−78. DOI: 10.3969/j.issn.1006-530X.2007.12.031
|
| [4] |
李国平,刘治国. 陕北地区煤炭资源开采过程中的生态破坏与对策[J]. 干旱区资源与环境,2007,21(1):47−50. DOI: 10.3969/j.issn.1003-7578.2007.01.010
LI Guoping,LIU Zhiguo. The ecological and environmental damage and economic loss in coal exploitation in northern Shaanxi[J]. Journal of Arid Land Resources and Environment,2007,21(1):47−50. DOI: 10.3969/j.issn.1003-7578.2007.01.010
|
| [5] |
徐友宁,张江华,何芳,等. 西北地区矿山地质环境调查与防治研究[J]. 西北地质,2022,55(3):129−139.
XU Youning,ZHANG Jianghua,HE Fang,et al. Investigation and preventive research of mine geological environment in northwest China[J]. Northwestern Geology,2022,55(3):129−139.
|
| [6] |
范立民. 榆神府区煤炭开采强度与地质灾害研究[J]. 中国煤炭,2014,40(5):52−55. DOI: 10.3969/j.issn.1006-530X.2014.05.014
FAN Limin. On coal mining intensity and geo–hazard in Yulin–Shenmu–Fugu mine area[J]. China Coal,2014,40(5):52−55. DOI: 10.3969/j.issn.1006-530X.2014.05.014
|
| [7] |
申艳军,杨博涵,王双明,等. 黄河几字弯区煤炭基地地质灾害与生态环境典型特征[J]. 煤田地质与勘探,2022,50(6):104−117.
SHEN Yanjun,YANG Bohan,WANG Shuangming,et al. Typical characteristics of geological hazards and ecological environment of coal base in the bends area of the Yellow River[J]. Coal Geology & Exploration,2022,50(6):104−117.
|
| [8] |
郭文兵,王云广. 基于绿色开采的高强度开采定义及其指标体系研究[J]. 采矿与安全工程学报,2017,34(4):616−623.
GUO Wenbing,WANG Yunguang. The definition of high–intensity mining based on green coal mining and its index system[J]. Journal of Mining & Safety Engineering,2017,34(4):616−623.
|
| [9] |
侯恩科,谢晓深,冯栋,等. 浅埋煤层开采地面塌陷裂缝规律及防治方法[J]. 煤田地质与勘探,2022,50(12):30−40.
HOU Enke,XIE Xiaoshen,FENG Dong,et al. Laws and prevention methods of ground cracks in shallow coal seam mining[J]. Coal Geology & Exploration,2022,50(12):30−40.
|
| [10] |
李运成,黄艳利,吴运标,等. 黄土沟壑区特厚煤层开采地表裂缝发育规律研究[J]. 矿业研究与开发,2022,42(6):68−73.
LI Yuncheng,HUANG Yanli,WU Yunbiao,et al. Study on the development law of surface cracks in extra–thick coal seam mining in loess gully region[J]. Mining Research and Development,2022,42(6):68−73.
|
| [11] |
王双明,魏江波,宋世杰,等. 黄土沟谷区浅埋煤层开采覆岩破坏与地表损伤特征研究[J]. 煤炭科学技术,2022,50(5):1−9.
WANG Shuangming,WEI Jiangbo,SONG Shijie,et al. Study on overburden and surface damage characteristics of shallow–buried coal seam mining in loess gully area[J]. Coal Science and Technology,2022,50(5):1−9.
|
| [12] |
侯恩科,张杰,谢晓深,等. 无人机遥感与卫星遥感在采煤地表裂缝识别中的对比[J]. 地质通报,2019,38(2/3):443−448.
HOU Enke,ZHANG Jie,XIE Xiaoshen,et al. Contrast application of unmanned aerial vehicle remote sensing and satellite remote sensing technology relating to ground surface cracks recognition in coal mining area[J]. Geological Bulletin of China,2019,38(2/3):443−448.
|
| [13] |
吴侃,胡振琪,常江,等. 开采引起的地表裂缝分布规律[J]. 中国矿业大学学报,1997,26(2):56−59.
WU Kan,HU Zhenqi,CHANG Jiang,et al. Distribution law of ground crack induced by coal mining[J]. Journal of China University of Mining & Technology,1997,26(2):56−59.
|
| [14] |
谢晓深,侯恩科,龙天文,等. 浅埋缓倾斜煤层开采覆岩及地表裂缝发育规律与形成机理[J]. 西安科技大学学报,2022,42(2):200−209.
XIE Xiaoshen,HOU Enke,LONG Tianwen,et al. Development law and formation mechanism of overburden and surface cracks induced by inclined coal seam mining in shallow buried area[J]. Journal of Xi’an University of Science and Technology,2022,42(2):200−209.
|
| [15] |
侯恩科,谢晓深,王双明,等. 中埋深煤层综采地表裂缝发育规律研究[J]. 采矿与安全工程学报,2021,38(6):1178−1188.
HOU Enke,XIE Xiaoshen,WANG Shuangming,et al. Development law of ground cracks induced by fully–mechanized mining of medium–buried coal seams[J]. Journal of Mining & Safety Engineering,2021,38(6):1178−1188.
|
| [16] |
胡振琪,王新静,贺安民. 风积沙区采煤沉陷地裂缝分布特征与发生发育规律[J]. 煤炭学报,2014,39(1):11−18.
HU Zhenqi,WANG Xinjing,HE Anmin. Distribution characteristic and development rules of ground fissures due to coal mining in windy and sandy region[J]. Journal of China Coal Society,2014,39(1):11−18.
|
| [17] |
FENG Dong,HOU Enke,XIE Xiaoshen,et al. Differences in the dynamic evolution of surface crack widths at different locations in the trench slope area and the mechanisms:A case study[J]. Environmental Geochemistry and Health,2023,45(10):7161−7182. DOI: 10.1007/s10653-022-01452-0
|
| [18] |
谢晓深,侯恩科,冯栋,等. 榆神府矿区采煤地表裂缝发育规律及特征[J]. 工程科学学报,2023,45(1):44−53.
XIE Xiaoshen,HOU Enke,FENG Dong,et al. Development law and characteristics of surface cracks caused by coal mining in Yushenfu mining area[J]. Chinese Journal of Engineering,2023,45(1):44−53.
|
| [19] |
陈超,胡振琪. 我国采动地裂缝形成机理研究进展[J]. 煤炭学报,2018,43(3):810−823.
CHEN Chao,HU Zhenqi. Research advances in formation mechanism of ground crack due to coal mining subsidence in China[J]. Journal of China Coal Society,2018,43(3):810−823.
|
| [20] |
余学义,王鹏,李星亮. 大采高浅埋煤层开采地表移动变形特征研究[J]. 煤炭工程,2012(7):61−63. DOI: 10.3969/j.issn.1671-0959.2012.07.025
YU Xueyi,WANG Peng,LI Xingliang. Study on surface movement and deformation features of underground mining in shallow seam with high cutting height[J]. Coal Engineering,2012(7):61−63. DOI: 10.3969/j.issn.1671-0959.2012.07.025
|
| [21] |
朱国宏,连达军. 开采沉陷对矿区地表裂缝的采动累积效应分析[J]. 中国安全生产科学技术,2012,8(5):47−51. DOI: 10.3969/j.issn.1673-193X.2012.05.009
ZHU Guohong,LIAN Dajun. Analysis on mining–induced cumulative effective of surface cracks in mining areas[J]. Journal of Safety Science and Technology,2012,8(5):47−51. DOI: 10.3969/j.issn.1673-193X.2012.05.009
|
| [22] |
余学义,李邦帮,李瑞斌,等. 西部巨厚湿陷性黄土层开采损害程度分析[J]. 中国矿业大学学报,2008,37(1):43−47. DOI: 10.3321/j.issn:1000-1964.2008.01.009
YU Xueyi,LI Bangbang,LI Ruibin,et al. Analysis of mining damage in huge thick collapsible loess of western China[J]. Journal of China Unversity of Mining & Technology,2008,37(1):43−47. DOI: 10.3321/j.issn:1000-1964.2008.01.009
|
| [23] |
谢晓深,侯恩科,赵兵朝,等. 缓倾斜厚煤层仰斜开采覆岩及地表损伤规律与机理研究[J/OL]. 煤炭学报,2024:1–16 [2024-12-01]. https://doi.org/10.13225/j.cnki.jccs.2024.0561.
XIE Xiaoshen,HOU Enke,ZHAO Bingchao,et al. Study on law and mechanism of overlying rock and surface damage in gently inclined thick coal seam[J/OL]. Journal of China Coal Society,2024:1–16 [2024-12-01]. https://doi.org/10.13225/j.cnki.jccs.2024.0561.
|
| [24] |
钱鸣高,许家林. 煤炭开采与岩层运动[J]. 煤炭学报,2019,44(4):973−984.
QIAN Minggao,XU Jialin. Behaviors of strata movement in coal mining[J]. Journal of China Coal Society,2019,44(4):973−984.
|
| [25] |
于秋鸽,张华兴,邓伟男. 基于尖点突变模型的采空塌陷地表裂缝形成机理[J]. 中国地质灾害与防治学报,2018,29(2):73−77.
YU Qiuge,ZHANG Huaxing,DENG Weinan. Mechanism of collapsing ground fissure formation based on cusp catastrophe model[J]. The Chinese Journal of Geological Hazard and Control,2018,29(2):73−77.
|
| [26] |
郭文兵,白二虎,赵高博. 高强度开采覆岩地表破坏及防控技术现状与进展[J]. 煤炭学报,2020,45(2):509−523.
GUO Wenbing,BAI Erhu,ZHAO Gaobo. Current status and progress on overburden and surface damage and prevention technology of high–intensity mining[J]. Journal of China Coal Society,2020,45(2):509−523.
|
| [27] |
侯恩科,陈育,车晓阳,等. 浅埋煤层过沟开采覆岩破坏特征及裂隙演化规律研究[J]. 煤炭科学技术,2021,49(10):185−192.
HOU Enke,CHEN Yu,CHE Xiaoyang,et al. Study on overburden failure characteristics and fracture evolution law of shallow buried coal seam through trench mining[J]. Coal Science and Technology,2021,49(10):185−192.
|
| [28] |
ZHOU Dawei,WU Kan,BAI Zhihui,et al. Formation and development mechanism of ground crack caused by coal mining:Effects of overlying key strata[J]. Bulletin of Engineering Geology and the Environment,2019,78:1025−1044. DOI: 10.1007/s10064-017-1108-2
|
| [29] |
徐祝贺,李全生,李晓斌,等. 浅埋高强度开采覆岩结构演化及地表损伤研究[J]. 煤炭学报,2020,45(8):2728−2739.
XU Zhuhe,LI Quansheng,LI Xiaobin,et al. Structural evolution of overburden and surface damage caused by high–intensity mining with shallow depth[J]. Journal of China Coal Society,2020,45(8):2728−2739.
|
| [30] |
XU Yuankun,WU Kan,LI Liang,et al. Ground cracks development and characteristics of strata movement under fast excavation:A case study at Bulianta Coal Mine,China[J]. Bulletin of Engineering Geology and the Environment,2019,78:325−340. DOI: 10.1007/s10064-017-1047-y
|
| [31] |
曹健,黄庆享. 浅埋近距煤层开采覆岩与地表裂缝发育规律及控制[J]. 煤田地质与勘探,2021,49(4):213−220. DOI: 10.3969/j.issn.1001-1986.2021.04.026
CAO Jian,HUANG Qingxiang. Regularity and control of overburden and surface fractures in shallow–contiguous seams[J]. Coal Geology & Exploration,2021,49(4):213−220. DOI: 10.3969/j.issn.1001-1986.2021.04.026
|
| [32] |
余学义,张恩强. 开采损害学[M]. 北京:煤炭工业出版社,2010.
|
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