冲击地压巷道围岩改性研究

刘业献; 王洪涛; 翟勃; 张寅; 李哲

doi:10.20174/j.JUSE.2024.04.15

地下空间与工程学报 >

2024 , Vol. 20 >Issue 4: 1210 - 1222

DOI: https://doi.org/10.20174/j.JUSE.2024.04.15

理论与试验研究

冲击地压巷道围岩改性研究

刘业献 ,
王洪涛 ,
翟勃 ,
张寅 ,
李哲

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1.陕西正通煤业有限公司,陕西长武 713600;
2.辽宁工程技术大学力学与工程学院,辽宁阜新 123000

刘业献(1973—),男,山东淄博人,硕士,研究员,主要从事煤矿安全生产技术及管理工作。E-mail:369444293@qq.com

张寅(1974—),男,陕西安康人,博士,教授,主要从事冲击地压等领域的教学与科研工作。E-mail:Zhangyin240314@163.com

收稿日期: 2023-11-18

网络出版日期: 2024-09-04

基金资助

国家自然科学基(52174116)

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Study on Surrounding Rock Modification of Rock Burst Roadway

Liu Yexian ,
Wang Hongtao ,
Zhai Bo ,
Zhang Yin ,
Li Zhe

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1. Shaanxi Zhengtong Coal Industry Co., Ltd., Changwu, Shanxi 713600, P.R. China;
2. School of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, P.R. China

Received date: 2023-11-18

Online published: 2024-09-04

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摘要

针对巷道围岩改性的研究,主要采用理论解析及室内试验相结合的方法,先分析改性前影响围岩塑性区范围的因素,再利用试验研究改性后不同时间段内试件的力学特性及声发射特征,通过抗压、抗拉、抗剪、声发射实验手段研究围岩改性体破裂力学显现过程。结果表明:改性前围岩塑性区范围受支护阻力、侧压力系数、软化系数、扩容梯度及残余强度等参数的影响;其他条件一定时,提高围岩破碎区的残余强度可减小围岩塑性区的范围;改性体7 d、14 d、28d的抗压强度逐渐增加,最终达到原煤样强度的48.95％,28天的抗拉强度达到原煤样强度,黏聚力与完整煤样相比提高了2.05倍,对围岩塑性圈的改良均有很好的效果;声发射研究得到:7 d、14 d改性体试件的声发射信号变化较强烈,且在各个阶段都有大量的声发射信号产生,在受力情况下试件内部情况复杂,而28 d改性体的声发射信号变化较稳定,主要集中在破坏前后,在时间的作用下改性体的破坏形式逐渐由延性破坏转变为脆性破坏,证明28 d后改性体的强度达到饱和值,在围岩改性强度稳定后才能发现再次进行施工。根据实际情况制定围岩注浆改性方案,并监测围岩顶底板及两帮的移近量,改性后的围岩稳定性增加,变形量减小。

关键词： 全煤巷道; 冲击地压; 围岩改性; 力学特性; 声发射特征

本文引用格式

刘业献 , 王洪涛 , 翟勃 , 张寅 , 李哲 . 冲击地压巷道围岩改性研究[J]. 地下空间与工程学报, 2024 , 20(4) : 1210 -1222 . DOI: 10.20174/j.JUSE.2024.04.15

Abstract

In view of the research on the modification of roadway surrounding rock, the combination of theoretical analysis and laboratory test is mainly used to theoretically analyze the factors affecting the plastic zone range of surrounding rock before modification. The mechanical properties and acoustic emission characteristics of the specimens in different time periods after modification were studied by experiments. The fracture mechanics of the surrounding rock modified body was studied by compressive, tensile, shear and acoustic emission experiments. The results show that the range of plastic zone of surrounding rock before modification is affected by parameters such as support resistance, lateral pressure coefficient, softening coefficient, dilatancy gradient and residual strength.The results show that the range of plastic zone of surrounding rock before modification is affected by parameters such as support resistance, lateral pressure coefficient, softening coefficient, dilatancy gradient and residual strength. When other conditions are certain, increasing the residual strength of the surrounding rock crushing zone can reduce the range of the surrounding rock plastic zone; the compressive strength of 7 days, 14 days and 28 days of the modified body gradually increased, and finally reached 48.95% of the strength of the original coal sample. The tensile strength of 28 days reached the strength of the original coal sample, and the cohesion was increased by 2.05 times compared with the complete coal sample, which had a good effect on the improvement of the plastic zone of the surrounding rock. The acoustic emission research shows that the acoustic emission signal of the modified body specimen changes strongly at 7 days and 14 days, and a large number of acoustic emission signals are generated at each stage. The internal situation of the specimen is complex under the force condition, while the acoustic emission signal of the modified body at 28 days is relatively stable, mainly before and after the failure. Under the action of time, the failure mode of the modified body gradually changes from ductile failure to brittle failure. It is proved that the strength of the modified body reaches the saturation value after 28 days, and the construction can be carried out again after the strength of the surrounding rock is stable. According to the actual situation, the grouting modification scheme of surrounding rock is formulated, and the displacement of the roof and floor of the surrounding rock and the two sides is monitored. The stability of the modified surrounding rock increases and the deformation decreases.

Key words： gateroads with coal seam as roof; rock burst;rock modification; mechanical characteristic; acoustic emission characteristics

参考文献

[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. Seventy years development and prospects of strata control technologies for coal mine roadways in China [J]. Chinese Journal of Rock Mechanics and Engineering, 2021,40 (1): 1-30. (in Chinese))
[2]王金华. 全煤巷道锚杆锚索联合支护机理与效果分析 [J]. 煤炭学报, 2012, 37(1): 1-7.(Wang Jinhua. Analysis on mechanism and effect of rock bolts and cables in gateroad with coal seam as roof [J]. Journal of China Coal Society, 2012, 37(1): 1-7. (in Chinese))
[3]贾安立, 黄旭. 高应力厚煤层全煤巷道锚杆支护研究 [J]. 煤炭科学技术, 2005, 33(7): 45-48.(Jia Anli, Huang Xu. Research on bolt support system for full seam gateway in high stressed thick seam [J]. Coal Science and Technology, 2005, 33(7): 45-48. (in Chinese))
[4]马念杰, 郭晓菲, 赵志强, 等均质圆形巷道蝶型冲击地压发生机理及其判定准则 [J]. 煤炭学报, 2016, 41(11): 2679-2688.(Ma Nianjie, Guo Xiaofei, Zhao Zhiqiang, et al. Occurrence mechanisms and judging criterion on circular tunnel butterfly rock burst in homogeneous medium [J]. Journal of China Coal Society, 2016, 41(11): 2679-2688. (in Chinese))
[5]赵志强, 马念杰, 郭晓菲, 等. 煤层巷道蝶型冲击地压发生机理猜想 [J]. 煤炭学报, 2016, 41(11): 2689-2697.(Zhao Zhiqiang, Ma Nianjie, Guo Xiaofei, et al. Mechanism conjecture of butterfly rock burst in coal seam roadway [J]. Journal of China Coal Society, 2016, 41(11): 2689-2697. (in Chinese))
[6]尹万蕾, 潘一山, 李忠华. 考虑塑性区强度参数劣化的圆形巷道冲击地压临界条件研究 [J]. 煤炭学报, 2018, 43(2): 348-355.(Yin Wanlei, Pan Yishan, Li Zhonghua. Critical condition of rock burst in the circular tunnel based on thestrength parameters of the degradation in the plastic zone [J]. Journal of China Coal Society, 2018, 43(2): 348-355. (in Chinese))
[7]孟庆彬, 韩立军, 王琦,等. 深部高应力软岩巷道注浆时机优化分析 [J]. 中南大学学报(自然科学版), 2017, 48(10): 2765-2776.(Meng Qingbin, Han Lijun, Wang Qi, et al. Optimization analysis of grouting timing in deep and high stress soft rock roadway [J]. Journal of Central South University (Science and Technology), 2017, 48(10): 2765-2776. (in Chinese))
[8]王晓蕾,熊祖强,袁印,等.破碎围岩无机材料注浆加固机理及其应用研究[J].地下空间与工程学报,2022,18(1):112-119.(Wang Xiaolei, Xiong Zuqiang, Yuan Yin, et al. Research and application of reinforcement mechanism of inorganic materials in broken rock [J]. Chinese Journal of Underground Space and Engineering, 2022,18 (1): 112-119. (in Chinese))
[9]李召峰,李术才,刘人太,等.富水破碎岩体注浆加固实验与机制研究[J].岩石力学与工程学报,2017,36(1):198-207.(Li Zhaofeng, Li Shucai, Liu Rentai, et al. Grouting reinforcement experiment for water-rich broken rock mass[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(1): 198- 207. (in Chinese))
[10]卢海峰,朱晨东,刘泉声.不同注浆材料作用下结构面剪切力学特性研究[J].岩石力学与工程学报,2021,40(9):1803-1811.(Lu Haifeng, Zhu Chendong, Liu Quansheng. Study on shear mechanical properties of structural planes grouted with different materials [J]. Chinese Journal of Rock Mechanics and Engineering, 2021,40 (9): 1803-1811. (in Chinese))
[11]刘彦伟,程远平,李国富. 高性能注浆材料研究与围岩改性试验[J]. 采矿与安全工程学报,2012,29(6):821-826.(Liu Yanwei,Cheng Yuanping,Li Guofu. Research on high performance grouting material and improving surrounding rock mass strength[J]. Journal of Mining and Safety Engineering,2012,29(6):821-826. (in Chinese))
[12]高远,靖洪文,喻梓轩,等.氧化石墨烯和水泥基复合注浆材料胶结碎石的力学性能试验研究[J].岩石力学与工程学报,2022,41(9):1898-1909.(Gao Yuan, Jing Hongwen, Yu Zixuan, et al. Experimental study on the mechanical properties of crushed stone cemented by graphene oxide and cement-based composite grouting materials [J].Chinese Journal of Rock Mechanics and Engineering, 2022,41 (9): 1898-1909. (in Chinese))
[13]宋朝阳,纪洪广,张月征,等.不同粒度弱胶结砂岩声发射信号源与其临界破坏前兆信息判识[J].煤炭学报,2020,45(12):4028-4036. (Song Zhaoyang, Ji Hongguang, Zhang Yuezheng, et al. Acoustic emission signal sources and critical failure precursors of weakly consolidated sandstone with different grain sizes[J]. Journal of China Coal Society, 2020, 45(12): 4028-4036. (in Chinese))
[14]刘人太,郑卓,李术才,等.破碎岩体注浆加固后的力学特性研究[J].中国公路学报,2018,31(10):284-291. (Liu Rentai, Zheng Zhuo, Li Shucai, et al. Mechanical properties of fractured rock mass with consideration of grouing reinforce ment[J]. China Journal of Highway and Transport, 2018, 31(10): 284-291. (in Chinese))
[15]冯国瑞,马敬凯,李竹,等.破碎围岩注浆加固体承载特性与损伤破坏机制[J].煤炭学报, 2023, 48(增2):411-423. (Feng Guorui, Ma Jingkai, Li Zhu, et al.Bearing characteristics and damage mechanism of grouting reinforced body for broken surrounding rock [J]. Journal of China Coal Society, 2023, 48(Supp.2):411-423. (in Chinese))
[16]董红娟,张金山,姚贺瑜,等.不同参数大尺度注浆体试件力学特性与失稳机制[J].中国矿业大学学报,2021,50(1):79-89. (Dong Hongjuan, Zhang Jinshan, Yao Heyu, et al. Mechanical properties and instability mechanism of large scale grouting speci mens with different parameters[J]. Journal of China University of Mining and Technology, 2021, 50(1): 79-89. (in Chinese))
[17]王琦, 王雷, 刘博宏, 等. 破碎围岩注浆体空隙特征和力学性能研究 [J]. 中国矿业大学学报, 2019, 48(6): 1197-1205.(Wang Qi, Wang Lei, Liu Bohong, et al. Study on void characteristics and mechanical properties of fractured surrounding rock grout [J]. Journal of China University of Mining and Technology, 2019, 48(6): 1197-1205. (in Chinese))
[18]王卫军, 董恩远, 袁超. 非等压圆形巷道围岩塑性区边界方程及应用 [J]. 煤炭学报, 2019, 44(1): 105-114. (Wang Weijun, Dong Enyuan, Yuan Chao. Boundary equation of plastic zone of circular roadway in non-axisymmetric stress and its application [J]. Journal of China Coal Society, 2019, 44(1): 105-114. (in Chinese))
[19]蔡美峰. 岩石力学与工程第2版 [M]. 北京:科学出版社, 2013.(Cai Meifeng. Rock mechanics and engineering 2nd edition[M]. Beijing:Science Press, 2013. (in Chinese))
[20]陈璐, 谭云亮, 臧传伟, 等. 加锚岩石力学性质及破坏特征试验研究 [J]. 岩土力学, 2014, 35(2): 413-422.(Chen Lu, Tan Yunliang, Zang Chuanwei, et al. Test study of mechanical properties and failure characteristics of anchored rock [J]. Rock and Soil Mechanics, 2014, 35(2): 413-422. (in Chinese))
[21]冯国瑞,文晓泽,郭军,等.含水率对煤样声发射特征和碎块分布特征影响的试验研究[J].中南大学学报(自然科学版),2021,52(8):2910-2918. (Feng Guorui, Wen Xiaoze, Guo Jun, et al. Study on influence of moisture content on coal sample AE properties and fragment dis tribution characteristics[J]. Journal of Central South University (Science and Technology), 2021, 52(8): 2910-2918. (in Chinese))
[22]李杨,孙光华,刘祥鑫,等.基于声发射特性与损伤本构关系的充填体脆–延性分析[J].矿业研究与开发,2018,38(11):20-25. (Li Yang, Sun Guanghua, Liu Xiangxin et al. Analysis on brittleness-ductility of the filling body based on acoustic emission characteristics and damage constitutive relation [J]. Mining Research and Development, 2018, 38 (11): 20-25. (in Chinese))
[23]赵光明,刘崇岩,许文松,等.扰动诱发高应力卸荷岩体破坏特征实验研究[J].煤炭学报,2021,46(2):412-423.(Zhao Guangming, Liu Chongyan, Xu Wensong, et al. Experi-mental study on the failure characteristics of high stress unloading rock mass induced by disturbance[J]. Journal of China Coal Society, 2021, 46(2): 412-423. (in Chinese))
[24]Zhou Xiaoping, Zhang Jianzhi. Damage progression and acoustic emission in brittle failure of granite and sandstone[J]. International Journal of Rock Mechanics and Mining Sciences, 2021, 143: 104789.

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