Failure mechanism of surrounding rock and control of floor heave in heterogeneous composite rock roadway

ZHANG Dong; BAI Jian-biao; YAN Shuai; WANG Rui; MENG Ning-kang; WANG Gong-yuan

doi:10.11779/CJGE202209015

Volume 44 Issue 9

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2022 > 44(9): 1699-1709. > DOI: 10.11779/CJGE202209015

ZHANG Dong, BAI Jian-biao, YAN Shuai, WANG Rui, MENG Ning-kang, WANG Gong-yuan. Failure mechanism of surrounding rock and control of floor heave in heterogeneous composite rock roadway[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(9): 1699-1709. DOI: 10.11779/CJGE202209015

Citation:

PDF (4069 KB)

Failure mechanism of surrounding rock and control of floor heave in heterogeneous composite rock roadway

1.
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, China
2.
School of Mines, China University of Mining & Technology, Xuzhou 221116, China

More Information

Received Date: October 17, 2021
Available Online: September 22, 2022

Graphical Abstract

Abstract

Abstract

Under the complex stress environment of deep high ground stress and interlayer weak interlayer (structural surface), the deformation of the surrounding rock of composite coal (rock) roadway is severe, and the floor heave is particularly prominent. In view of the technical difficulties in the large deformation of the floor heave in the complex region of -830 roadway in a mine, the deformation and failure characteristics of the roadway are investigated, and the failure mechanics mechanism of the surrounding rock is analyzed. Based on the theory of slip-line field, a mechanical model for the floor heave is established and is used to derive an explicit analytical formula for the failure radius of the floor (R₀). With the help of ZDY borehole peeper, the development degree of damage cracks in the surrounding rock is quantified. The UDEC numerical calculation model is established to inverse the stress of the surrounding rock, fracture development characteristics and displacement distribution laws of composite rock roadway under the original support, and the deformation mechanism of floor heave of composite rock roadway is comprehensively analyzed. The results show that the high ground stress, large difference in the ultimate strength of adjacent rock, poor lithology of floor, no support or weak support of floor are the fundamental causes of deformation of the floor heave in composite rock roadway. Considering the results of field investigation and numerical simulation analysis, based on the control idea of "solid bottom-strong side" overall support and "strong-weak-strong" combined bearing ring to strengthen the floor plate step by step, a combined support technology of "full-section anchor cable + precast block inverted-arch" is proposed and applied to the repair practice of the floor heave of composite rock roadway. The field monitoring results show that the floor heave deforms slowly until it becomes stable within 60 days of roadway repair, and the maximum floor heave is about 67.9 mm, which is 95% lower than that under the original support conditions, greatly reducing the possibility of repeated repair of roadway and ensuring the safe and efficient mining of coal resources in the mine.
- composite rock roadway,
- floor heave,
- full-section anchor cable,
- precast block reverse arch,
- bolt-grouting combined support

FullText(HTML)

References (21)

References

[1]	东兆星, 吴士良. 井巷工程[M]. 徐州: 中国矿业大学出版社, 2004. DONG Zhao-xing, WU Shi-liang. Shaft engineering[M]. Xuzhou: China University of Mining & Technology Press, 2004. (in Chinese)
[2]	谢和平. 深部岩体力学与开采理论研究进展[J]. 煤炭学报, 2019, 44(5): 1283–1305. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201905002.htm XIE He-ping. Research review of the state key research development program of China: deep rock mechanics and mining theory[J]. Journal of China Coal Society, 2019, 44(5): 1283–1305. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201905002.htm
[3]	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. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201906004.htm WANG Qi, WANG Lei, LIU Bo-hong, et al. Study of void characteristics and mechanical properties of fractured surrounding rock grout[J]. Journal of China University of Mining & Technology, 2019, 48(6): 1197–1205. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201906004.htm
[4]	王卫军, 袁越, 余伟健, 等. 采动影响下底板暗斜井的破坏机理及其控制[J]. 煤炭学报, 2014, 39(8): 1463–1472. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201408013.htm WANG Wei-jun, YUAN Yue, YU Wei-jian, et al. Failure mechanism of the subinclined shaft in floor under mining influence and its control[J]. Journal of China Coal Society, 2014, 39(8): 1463–1472. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201408013.htm
[5]	孙晓明, 张国锋, 蔡峰, 等. 深部倾斜岩层巷道非对称变形机制及控制对策[J]. 岩石力学与工程学报, 2009, 28(6): 1137–1143. doi: 10.3321/j.issn:1000-6915.2009.06.007 SUN Xiao-ming, ZHANG Guo-feng, CAI Feng, et al. Asymmetric deformation mechanism within inclined rock strata induced by excavation in deep roadway and its controlling countermeasures[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(6): 1137–1143. (in Chinese) doi: 10.3321/j.issn:1000-6915.2009.06.007
[6]	姜耀东, 陆士良. 巷道底臌机理的研究[J]. 煤炭学报, 1994, 19(4): 343–351. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB404.001.htm JIANG Yao-dong, LU Shi-liang. Investigation of mechanism of floor heave of roadway[J]. Journal of China Coal Society, 1994, 19(4): 343–351. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB404.001.htm
[7]	文志杰, 卢建宇, 肖庆华, 等. 软岩回采巷道底臌破坏机制与支护技术[J]. 煤炭学报, 2019, 44(7): 1991–1999. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201907005.htm WEN Zhi-jie, LU Jian-yu, XIAO Qing-hua, et al. Failure mechanism of floor heave and supporting technology of soft rock roadway[J]. Journal of China Coal Society, 2019, 44(7): 1991–1999. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201907005.htm
[8]	高明中, 井欢庆. 巷道非对称底鼓的力学解析[J]. 安徽理工大学学报(自然科学版), 2012, 32(4): 38–43. doi: 10.3969/j.issn.1672-1098.2012.04.009 GAO Ming-zhong, JING Huan-qing. Mechanical analysis of asymmetric floor heave of roadway[J]. Journal of Anhui University of Science and Technology (Natural Science), 2012, 32(4): 38–43. (in Chinese) doi: 10.3969/j.issn.1672-1098.2012.04.009
[9]	柏建彪, 李文峰, 王襄禹, 等. 采动巷道底鼓机理与控制技术[J]. 采矿与安全工程学报, 2011, 28(1): 1–5. doi: 10.3969/j.issn.1673-3363.2011.01.001 BAI Jian-biao, LI Wen-feng, WANG Xiang-yu, et al. Mechanism of floor heave and control technology of roadway induced by mining[J]. Journal of Mining & Safety Engineering, 2011, 28(1): 1–5. (in Chinese) doi: 10.3969/j.issn.1673-3363.2011.01.001
[10]	安智海, 张农, 倪建明, 等. 朱仙庄煤矿松软破碎岩层巷道底鼓控制技术[J]. 采矿与安全工程学报, 2008, 25(3): 263–267. doi: 10.3969/j.issn.1673-3363.2008.03.003 AN Zhi-hai, ZHANG Nong, NI Jian-ming, et al. Floor heave control technique for broken soft rock roadway in Zhuxianzhuang mine[J]. Journal of Mining & Safety Engineering, 2008, 25(3): 263–267. (in Chinese) doi: 10.3969/j.issn.1673-3363.2008.03.003
[11]	谢广祥, 常聚才. 超挖锚注回填控制深部巷道底臌研究[J]. 煤炭学报, 2010, 35(8): 1242–1246. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201008004.htm XIE Guang-xiang, CHANG Ju-cai. Study on overcutting-bolting & grouting-backfilling concrete to control the floor heave of deep mine roadway[J]. Journal of China Coal Society, 2010, 35(8): 1242–1246. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201008004.htm
[12]	康红普, 林健, 吴拥政. 全断面高预应力强力锚索支护技术及其在动压巷道中的应用[J]. 煤炭学报, 2009, 34(9): 1153–1159. doi: 10.3321/j.issn:0253-9993.2009.09.001 KANG Hong-pu, LIN Jian, WU Yong-zheng. High pretensioned stress and intensive cable bolting technology set in full section and application in entry affected by dynamic pressure[J]. Journal of China Coal Society, 2009, 34(9): 1153–1159. (in Chinese) doi: 10.3321/j.issn:0253-9993.2009.09.001
[13]	彭瑞, 赵光明, 孟祥瑞. 基于D-P准则的非均匀应力场受扰动轴对称巷道安全性分析[J]. 中国安全科学学报, 2014, 24(1): 103–108. doi: 10.3969/j.issn.1003-3033.2014.01.017 PENG Rui, ZHAO Guang-ming, MENG Xiang-rui. Analysis of safety of disturbed and axisymmetric roadway under non-uniform stress field based on D-P criterion[J]. China Safety Science Journal, 2014, 24(1): 103–108. (in Chinese) doi: 10.3969/j.issn.1003-3033.2014.01.017
[14]	李季, 彭博, 袁鹏. 深部沿空巷道顶板蝶叶塑性区"低阻微变"性形成机理研究[J]. 采矿与安全工程学报, 2019, 36(3): 465–472, 481. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201903005.htm LI Ji, PENG Bo, YUAN Peng. A formation mechanism of "low resistance and slight change" in plastic zone of butterfly leaf on the roof in deep roadway[J]. Journal of Mining & Safety Engineering, 2019, 36(3): 465–472, 481. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201903005.htm
[15]	冯帆, 赵兴东, 陈绍杰, 等. 结构面位置对于深部高应力采动硬岩巷道破坏的影响[J]. 中南大学学报(自然科学版), 2021, 52(8): 2588–2600. https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGD202108007.htm FENG Fan, ZHAO Xing-dong, CHEN Shao-jie, et al. Effect of structural plane position on hard tunnel failure during excavation unloading subjected to high stresses in deep level mines[J]. Journal of Central South University (Science and Technology), 2021, 52(8): 2588–2600. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGD202108007.htm
[16]	张淑坤, 王树达, 王来贵, 等. 结构面局部弱化影响下巷道围岩稳定性研究[J]. 中国安全科学学报, 2018, 28(7): 116–121. https://www.cnki.com.cn/Article/CJFDTOTAL-ZAQK201807019.htm ZHANG Shu-kun, WANG Shu-da, WANG Lai-gui, et al. Stability study of roadway surrounding rock under influence of local weakening of structural plane[J]. China Safety Science Journal, 2018, 28(7): 116–121. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZAQK201807019.htm
[17]	耶格尔J C, 库克N G W. 岩石力学基础[M]. 中国科学院工程力学研究所译. 北京: 科学出版社, 1981. JAEGER J C, COOK N G W. Fundamentals of Rock-Mechanics[M]. Translated by Institute of Mechanics, Chinese Academy of Sciences. Beijing: Science Press, 1981. (in Chinese)
[18]	程辉, 赵洪宝, 徐建峰, 等. 基于滑移线场理论的巷道底鼓机理与防治技术研究[J]. 矿业科学学报, 2021, 6(3): 314–322. https://www.cnki.com.cn/Article/CJFDTOTAL-KYKX202103009.htm CHENG Hui, ZHAO Hong-bao, XU Jian-feng, et al. Study on floor heave mechanism and control technology of roadway based on slip line field theory[J]. Journal of Mining Science and Technology, 2021, 6(3): 314–322. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-KYKX202103009.htm
[19]	ZHANG L Y, EINSTEIN H H. Using RQD to estimate the deformation modulus of rock masses[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41(2): 337–341. doi: 10.1016/S1365-1609(03)00100-X
[20]	SINGH M, RAO K S. Empirical methods to estimate the strength of jointed rock masses[J]. Engineering Geology, 2005, 77(1/2): 127–137. doi: 10.1016/j.enggeo.2004.09.001
[21]	侯朝炯. 深部巷道围岩控制的关键技术研究[J]. 中国矿业大学学报, 2017, 46(5): 970–978. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201705003.htm HOU Chao-jiong. Key technologies for surrounding rock control in deep roadway[J]. Journal of China University of Mining & Technology, 2017, 46(5): 970–978. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201705003.htm

[1]	ZHANG Yu-ting, AN Xiao-yu, JIN Ya-fei. Centrifugal model tests on settlement of structures caused by tunnel excavation[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 54-57. DOI: 10.11779/CJGE2022S2012
[2]	LIU Hong-kai, WU Cheng-jie, YU Feng, XIA Tang-dai. Improved solution for predicting settlement of tubular-pile composite ground[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk2): 638-642.
[3]	MA Xian-feng, WANG Jun-song, LI Xiao-yun, YU Long. Centrifuge modeling of ground loss and settlement caused by shield tunnelling in soft ground[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(5): 942-947.
[4]	Settlement of overlaying soil caused by decompression of confined water[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(1).
[5]	ZHOU Shunhua, XU Kai, WANG Binglong, WANG Xiang. Research on settlement of soft ground under overloading-unloading and reloading[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(10): 1226-1229.
[6]	ZHANG Yiping. Probability method for foundation settlement simulated with poisson curve[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(7): 837-840.
[7]	JING Fei, LIU Songyu, SHAO Guanghui. The settlement of embankment on soft ground[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(6): 728-730.
[8]	DAI Rongliang, CHEN Hui, YU Yunyan. Subsoil character of pile foundation and settlement analysis of high-rise buildings in shanghai[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(5): 627-630.
[9]	HUANG Guangjun, ZHANG Qianli, YU Xijian, LUO Qiang, CAI Ying. Comparison of settlement control of reinforcement layer[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(5): 598-601.
[10]	Jin Bo, Li Zhibiao, Gu Yaozhang. Settlement Analysis of Single Pile in Layered Soil[J]. Chinese Journal of Geotechnical Engineering, 1997, 19(5): 37-44.