WU Shaokang，ZHANG Junwen，XU Youlin，et al. Study on the stress evolution law of surrounding rock and cooperative control technology in coal seam group mining[J]. Coal Science and Technology，2024，52（3）：24−37
. DOI: 10.12438/cst.2023-0515| Citation: |
WU Shaokang，ZHANG Junwen，XU Youlin，et al. Study on the stress evolution law of surrounding rock and cooperative control technology in coal seam group mining[J]. Coal Science and Technology，2024，52（3）：24−37 . DOI: 10.12438/cst.2023-0515
|
Aiming at addressing the challenges encountered in roadway support during coal seam group mining, this project focuses on the 212 main return-air cross-cut in Tucheng Mine, Guizhou Province. Through field investigation, numerical simulation, analog simulation, and field tests, the study reveals the stress evolution pattern of the 212 main return-air cross-cut and proposes the collaborative control technology of “unloading-rotating-fixing”. The findings indicate that the main cause of failure in the 212 main return-air cross-cut is the instability of the surrounding rock resulting from geomechanical issues during coal seam group mining. The floor and two sides of roadway produce different degree of stress concentration during mining. When the tunnel experiences vertical stress compression, the compressive force at the tunnel’s bottom is greater and the tensile force in the surrounding rock at the top is larger, leading to failure of the surrounding rock due to mechanical imbalance. Consequently, the “unloading-rotating-fixing” cooperative control technology is proposed. The shock waves generated by blasting induce vibration and stress fluctuations in the surrounding rock, dispersing the initially concentrated stress in the surface rock to deeper areas and reducing the stress concentration levels on the surface. Additionally, the surrounding rock around pressure relief holes is further reinforced using blasting and sealing techniques to form two load-bearing structures: the inner carrier composed of the roadway support system and the outer carrier formed by the deep surrounding rock. The interaction between these two components enables them to effectively withstand the stress from both shallow and deep surrounding rock of the roadway, transferring it to the supporting structure and playing a crucial role in protecting and stabilizing the surrounding rock. This technology was utilized during the field test at the 212 main return-air cross-cut with great success. The results demonstrate that the stress levels in the area tend to remain stable or even slightly decrease over time. The convergence speed of the roof, floor, and sides of the roadway is reduced by 74.49% and 47.67%, respectively, while the floor heave volume is decreased by 77.2%. However, in areas where this technique is not applied, the stress levels increase to varying degrees, leading to significant surface displacement convergence. It can be concluded that the control effect on surrounding rock is remarkable. This technology has been successfully implemented in other coal mines located in diverse geological environments in Guizhou Province, yielding remarkable outcomes.
| [1] |
康红普. 我国煤矿巷道围岩控制技术发展70年及展望[J]. 岩石力学与工程学报,2021,40(1):1−30.
KANG Hongpu. 70 years and Prospect of the development of surrounding rock control technology of coal mine roadway in China[J]. Journal of Rock Mechanics and Engineering,2021,40(1):1−30.
|
| [2] |
康红普,姜鹏飞,黄炳香,等. 煤矿千米深井巷道围岩支护−改性−卸压协同控制技术[J]. 煤炭学报,2020,45(3):845−864.
KANG Hongpu,JIANG Pengfei,HUANG Bingxiang,et al. Collaborative control technology of surrounding rock support-modification-decompression for coal mine thousand-meter deep mine roadway[J]. Journal of China Coal Society,2020,45(3):845−864.
|
| [3] |
康红普,徐 刚,王彪谋,等. 我国煤炭开采与岩层控制技术发展40a及展望[J]. 采矿与岩层控制工程学报,2019,1(2):7−39.
KANG Hongpu,XU Gang,WANG Biaomou,et al. Forty years development and prospects of underground coal mining and strata control technologies in China[J]. Journal of Mining And Strata Control Engineering,2019,1(2):7−39.
|
| [4] |
WU Shaokang,ZHANG Junwen,SONG Zhixiang,et al. Review of the development status of rock burst disaster prevention system in China[J]. Journal of Central South University,2023,30(11):3763−3789. doi: 10.1007/s11771-023-5478-2
|
| [5] |
王茂盛. 赵庄矿深部大断面复合顶板煤巷变形破坏机理与控制对策[D]. 北京:中国矿业大学(北京),2019.
WANG Maosheng. Failure mechanism and control strategy of deep large-section coal roadway with composite roof in Zhaozhuang coal mine[D]. Beijing:China University of Mining and Technology-Beijing, 2019.
|
| [6] |
左建平,文金浩,胡顺银,等. 深部煤矿巷道等强梁支护理论模型及模拟研究[J]. 煤炭学报,2018,43(S1):1−11.
ZUO Jianping,WEN Jinhao,HU Shunyin,et al. Theoretical model and simulation study of equal strength beam support in deep coal mine roadway[J]. Journal of China Coal Society,2018,43(S1):1−11.
|
| [7] |
刘学生,武允昊,谭云亮,等. 深部高水平应力巷道倾斜锚杆破断机制及加强支护时机[J]. 煤炭学报,2023,48(2):609−622.
LIU Xuesheng,WU Yunhao,TAN Yunliang,et al. Study on the breaking mechanism of inclined bolt in deep high-level stress roadway and the opportunity to strengthen support[J]. Journal of China Coal Society,2023,48(2):609−622.
|
| [8] |
康红普,姜鹏飞,高富强,等. 掘进工作面围岩稳定性分析及快速成巷技术途径[J]. 煤炭学报,2021,46(7):2023−2045.
KANG Hongpu,JIANG Pengfei,GAO Fuqiang,et al. Stability analysis of surrounding rock of heading face and technical approach of rapid roadway formation[J]. Journal of China Coal Society,2021,46(7):2023−2045.
|
| [9] |
王 恩,谢生荣,陈冬冬,等. 剧烈采动影响煤巷围岩偏应力分布规律与控制[J]. 采矿与安全工程学报,2021,38(2):276−285,294.
WANG En,XIE Shengrong,CHEN Dongdong,et al. Distribution law and control of deviator stress in surrounding rock of coal roadway affected by violent mining[J]. Journal of Mining & Safety Engineering,2021,38(2):276−285,294.
|
| [10] |
靖洪文,孟庆彬,朱俊福,等. 深部巷道围岩松动圈稳定控制理论与技术进展[J]. 采矿与安全工程学报,2020,37(3):429−442.
JING Hongwen,MENG Qingbin,ZHU Junfu,et al. Stability control theory and technology progress of deep roadway surrounding rock loose zone [J]. Journal of Mining & Safety Engineering,20,37(3):429−442.
|
| [11] |
吴拥政,付玉凯,何 杰,等. 深部冲击地压巷道“卸压−支护−防护”协同防控原理与技术[J]. 煤炭学报,2021,46(1):132−144.
WU Yongzheng,FU Yukai,HE Jie,et al. Principle and technology of collaborative prevention and control of deep rock burst roadway “Depressury-Bolt-protection”[J]. Journal of China Coal Society,2021,46(1):132−144.
|
| [12] |
康红普,姜鹏飞,杨建威,等. 煤矿千米深井巷道松软煤体高压锚注−喷浆协同控制技术[J]. 煤炭学报,2021,46(3):747−762.
KANG Hongpu,JIANG Pengfei,YANG Jianwei,et al. Collaborative control technology of High pressure anchor-shotcrete for soft coal mass in kilometer deep coal mine[J]. Journal of China Coal Society,2021,46(3):747−762.
|
| [13] |
徐佑林,张 辉. 动压影响下的软岩巷道加固治理技术研究[J]. 煤炭科学技术,2018,46(1):68−73,111.
XU Youlin,ZHANG Hui. Research on reinforcement and treatment technology of soft rock roadway under the influence of dynamic pressure[J]. Coal Science and Technology,2018,46(1):68−73,111.
|
| [14] |
闫小卫. 高应力软岩巷道大变形机理及返修支护技术研究[J]. 工矿自动化,2021,47(6):116−123.
YAN Xiaowei. Study on large deformation mechanism and repair support technology of high stress soft rock Roadway[J]. Automation of Industry and Mine,2021,47(6):116−123.
|
| [15] |
杨仁树,李永亮,郭东明,等. 深部高应力软岩巷道变形破坏原因及支护技术[J]. 采矿与安全工程学报,2017,34(6):1035−1041.
YANG Renshu,LI Yongliang,GUO Dongming,et al. Deformation failure cause and support technology of deep high stress soft rock roadway[J]. Journal of Mining & Safety Engineering,2017,34(6):1035−1041.
|
| [16] |
王羽扬,刘 勇,王 沉,等. 高应力大变形软岩巷道“三壳”围岩控制机理及应用[J]. 中国安全生产科学技术,2019,15(7):100−106.
WANG Yuyang,LIU Yong,WANG Chen,et al. High stress large deformation soft rock roadway “three shell” surrounding rock control machine[J]. Journal of Safety Science and Technology,2019,15(7):100−106.
|
| [17] |
CHEN Baobao,LIU Changyou,WU Fengfeng. Optimization and practice for partition pressure relief of deep mining roadway using empty-hole and deep-hole blasting to weaken coal[J]. Geofluids,2021,9335523.
|
| [18] |
谢生荣,王 恩,陈冬冬,等. 深部强采动大断面煤巷围岩外锚−内卸协同控制技术[J]. 煤炭学报,2022,47(5):1946−1957.
XIE Shengrong,WANG En,CHEN Dongdong,et al. Collaborative control technology of external anchor and internal unloading of surrounding rock in large section coal roadway with deep strong mining[J]. Journal of China Coal Society,2022,47(5):1946−1957.
|
| [19] |
李桂臣,杨 森,孙元田,等. 复杂条件下巷道围岩控制技术研究进展[J]. 煤炭科学技术,2022,50(6):29−45.
LI Guichen,YANG Sen,SUN Yuantian,et al. Research progress of roadway surrounding rock control technology under complex conditions[J]. Coal Science and Technology,2022,50(6):29−45.
|
| [20] |
康永水,耿 志,刘泉声,等. 我国软岩大变形灾害控制技术与方法研究进展[J]. 岩土力学,2022,43(8):2035−2059.
KANG Yongshui,GENG Zhi,LIU Quansheng,et al. Research progress in large deformation disaster control technology and methods of soft rock in China[J]. Rock and Soil Mechanics,2022,43(8):2035−2059.
|
| [21] |
张俊文. 错层位沿空巷道卸压机理及空间适应性研究[D]. 北京:中国矿业大学(北京),2013.
ZHANG Junwen. Study on pressure relief mechanism and space adaptability for stagger arrangement gob-side entry [D]. Beijing:China University of Mining and Technology-Beijing,2013.
|
| [22] |
TAI Yang,XIA Hongchun,MENG Xiangbin,et al. Failure mechanism of the large-section roadway undermined zones in the ultra-thick coal seam and its control technology[J]. Energy Science & Engineering,2019,8(4):999−1014.
|
| [23] |
雷 振,黄永辉,陈文梦,等. 爆炸冲击荷载下扩腔体积和能耗随抵抗线的变化规律研究[J]. 振动与冲击,2021,40(4):66−71.
LEI Zhen,HUANG Yonghui,CHEN Wenmeng,et al. Study on Variation of cavity volume and energy consumption with resistance Line under explosion impact load[J]. Journal of Vibration and Shock,2021,40(4):66−71.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: