Simulation study on slip failure of roadway surrounding rocks containing weak layer

DING Minjie; GUO Pengfei; PENG Yanyan

Safety in Coal Mines > 2021 > 52(7): 237-244.

DING Minjie, GUO Pengfei, PENG Yanyan. Simulation study on slip failure of roadway surrounding rocks containing weak layer[J]. Safety in Coal Mines, 2021, 52(7): 237-244.

Citation:

DING Minjie, GUO Pengfei, PENG Yanyan. Simulation study on slip failure of roadway surrounding rocks containing weak layer[J]. Safety in Coal Mines, 2021, 52(7): 237-244.

Citation:

DING Minjie, GUO Pengfei, PENG Yanyan. Simulation study on slip failure of roadway surrounding rocks containing weak layer[J]. Safety in Coal Mines, 2021, 52(7): 237-244.

PDF (5037 KB)

Simulation study on slip failure of roadway surrounding rocks containing weak layer

More Information

Published Date: July 19, 2021

Graphical Abstract

Abstract

Abstract

To study the influence of weak layer on the slip failure of surrounding rocks of coal mine roadway, numerical models of coal mine roadway with weak layer are created by using the numerical simulation software UDEC. The influencing laws on slip failure of roadway surrounding rocks under the weak layer and the lateral pressure coefficient are studied. The results show that the existence of weak layer changes the stress transmission path in the surrounding rocks and reduces the stress transmission from the deep part of surrounding rock to the coal wall and promotes the stress transmission from coal seam roof to the coal wall. The weak layer aggravates the shear failure and horizontal slip of surrounding rocks. With the increase of the thickness of the weak layer, the critical failure depth of surrounding rock increases, the shear failure of coal becomes more obvious, and the plastic zone depth and horizontal slip value of surrounding rock also further expand. The lateral pressure coefficient has an important influence on the stability of the surrounding rocks of roadway with weak layer. When the lateral pressure coefficient is 1.0, the surrounding rock of roadway is in the most stable state. When the lateral pressure coefficient is between 1.0 and 2.0, the plastic zone depth of surrounding rock will increase further with the increase of lateral pressure coefficient, and the slip value of surrounding rock will increase non-linearly.
- weak layer,
- coal mine roadway,
- slip failure,
- discrete element,
- coal rock mass,
- critical failure depth

FullText(HTML)

References (20)

References

[1]	谢和平，周宏伟，薛东杰，等．煤炭深部开采与极限开采深度的研究与思考[J]．煤炭学报，2012，37（4）：535－542. XIE Heping, ZHOU Hongwei, XUE Dongjie, et al. Research and consideration on deep coal mining and critical mining depth[J]. Journal of China Coal Society, 2012, 37（4）: 535-542.
[2]	谢和平，高峰，鞠杨．深部岩体力学研究与探索[J]．岩石力学与工程学报，2015，34（11）：2161－2178. XIE Heping, GAO Feng, JU Yang. Research and development of rock mechanics in deep ground engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34（11）: 2161-2178.
[3]	MORTAZAVI A, MOLLADAVOODI H. A numerical investigation of brittle rock damage model in deep underground openings[J]. Engineering Fracture Mechanics, 2012, 90（4）: 101-120.
[4]	刘听成．岩石力学有关名词解释[Ｍ]．北京：煤炭工业出版社，1986.
[5]	沈明荣．岩体力学[Ｍ]．上海：同济大学出版社，1999.
[6]	王玉和，李春朋，崔增斌．含软弱夹层对巷道围岩承载结构的影响分析[J]．科学技术与工程，2019，19（36）：111－116. WANG Yuhe, LI Chunpeng, CUI Zengbin, et al. Analyses on the influence of soft inter-layer on the bearing structure of roadway surrounding rock[J]. Science Technology and Engineering, 2019, 19（36） : 111-116.
[7]	李剑光，魏剑，史啸，等．软弱夹层倾角对巷道围岩稳定性的影响[J]．科学技术与工程，2019，19（21）：285. LI Jianguang, WEI Jian, SHI Xiao, et al. The influence of the dip angle of weak inter-layer on stability of roadway surrounding rock[J]. Science Technology and Engineering, 2019, 19（21）: 285.
[8]	王书文，鞠文君，潘俊锋，等．构造应力场煤巷掘进冲击地压能量分区演化机制[J]．煤炭学报，2019，44（7）：2000－2010. WANG Shuwen, JU Wenjun, PAN Junfeng, et al. Mechanism of energy partition evolution of excavation roadway rock burst in coal seam under tectonic stress field[J]. Journal of China Coal Society, 2019,44（7）: 2000-2010.
[9]	郭良，黄成麟，张春雷．高水平应力下大断面巷道围岩破坏机理及支护方案[J]．煤矿安全，2018，49（9）：226－270. GUO Liang, HUANG Chenglin, ZHANG Chunlei. Failure mechanism and support scheme of large section roadway surrounding rock under high horizontal stress[J]. Safety in Coal Mines, 2018, 49（9）: 226.
[10]	郭海．软弱夹层对公路隧道围岩松动破坏数值影响分析[J]．中国水运，2016，16（8）：114－115. GUO Hai. Analysis of the influence of weak layer on the numerical value of highway tunnel surrounding rock loose failure[J]. China Water Transport, 2016, 16（8）: 114-115.
[11]	张迎贵，涂敏．软弱夹层层位对巷道围岩稳定性的影响[J]．煤矿安全，2014，45（5）：216－219. ZHANG Yinggui, TU Min. The effect of weak interlayer horizon on roadway surrounding rock stability[J].Safety in Coal Mines, 2014, 45（5）: 216-219.
[12]	孙利辉，纪洪广，杨本生，等．大采深巷道底板软弱夹层对底鼓的影响数值分析[J]．采矿与安全工程学报，2014，31（5）：695. SUN Lihui, JI Hongguang, YANG Bensheng, et al. Simulation analysis of influence of floor weak interlayer on floor heave in deep mining roadway[J]. Journal of Mining & Safety Engineering, 2014, 31（5）: 695.
[13]	唐礼忠，高龙华，王春，等．动力扰动下含软弱夹层巷道围岩稳定性数值分析[J]．采矿与安全工程学报，2016，33（1）：63－69. TANG Lizhong, GAO Longhua, WANG Chun, et al. Numerical analysis of stability of roadway surrounding rock with weak interlayer under dynamic disturbance[J]. Journal of Mining & Safety Engineering, 2016, 33（1）: 63-69.
[14]	周永利，黄浩轩．露天矿内排土场堆叠过程中边坡形态优化[J].煤矿安全，2019，50（6）：263－271. ZHOU Yongli, HUANG Haoxuan. Optimization design of slope shape during stacking process of inner dump in open pit mine[J]. Safety in Coal Mines 2019, 50（6）: 263-271.
[15]	丁军，罗亚飞．煤矿巷道含软弱夹层底板锚固孔钻进扩径现象研究[J].煤矿安全，2018，49（9）：228－232. DING Jun, LUO Yafei. Diameter expansion of anchor hole in floor roadway with weak interlayer during drilling process[J]. Safety in Coal Mines, 2018, 49（9）; 228-232.
[16]	李新旺，孙利辉，杨本生，等．巷道底板软弱夹层厚度对底鼓影响的模拟分析[J]．采矿与安全工程学报，2017，34（3）：504. LI Xinwang, SUN Lihui, YANG Bensheng, et al. Simulation of the influence of thickness of the weak interlayer on the floor heave of the roadway[J]. Journal of Mining & Safety Engineering, 2017, 34（3）: 504。
[17]	赵明华．土力学与基础工程[Ｍ]．武汉：武汉工业大学出版社，2003.
[18]	马念杰．深井煤巷煤帮支护技术研究[J]．建井技术，2006，27（1）：15－18. MA Nianjie. Research on coal gang support technology indeep coal roadway[J]. Well construction technology 2006, 27（1）: 15-18.
[19]	单仁亮，孔祥松．煤巷强帮支护理论与应用[J]．岩石力学与工程学报，2013，32（7）：1304－1314. SHAN Renliang, KONG Xiangsong. Theory and application of strong support for coal roadway sidewall[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32（7）: 1304-1314.
[20]	何富连．巨高巷道帮不稳定三角块滑移及控制[J]．岩石力学与工程学报，2015，31（4）：3238－3247. HE Fulian. Slip and control of coal side unstable triangle block in super-high roadway[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 31（4）: 3238-3247.

[1]	WANG Yanhui, DANG Chongzhe. Discrete element study on influence of heterogeneous structure on strength and failure characteristics of coal rock combination[J]. Safety in Coal Mines, 2023, 54(3): 147-152.
[2]	GUO Yan. Failure mechanism and fracture development law of heterogeneous brittle rock[J]. Safety in Coal Mines, 2022, 53(5): 67-72，80.
[3]	Evolution characteristics of cracks and strain energy during progressive failure of coal and rock masses around the hole[J]. Safety in Coal Mines, 2022, 53(3): 16-23.
[4]	WANG Huifeng, SONG Libing. Study on Deformation and Failure Laws of Surrounding Rock in Layered Rock Roadway by Discrete Element Method[J]. Safety in Coal Mines, 2020, 51(12): 56-62.
[5]	HE Tao, WANG Li. Research on Damage Evolution Laws of Rock-coal-rock Combination Based on Particle Discrete Element Model[J]. Safety in Coal Mines, 2018, 49(7): 205-208.
[6]	ZHENG Wei. Calculation of Floor Mining Failure Depth and Failure Characteristics Analysis of Inclined Coal Seam[J]. Safety in Coal Mines, 2017, 48(10): 195-198.
[7]	JI Guoqing, LI Yingming. Torsion Failure of Glass Fiber Reinforced Plastic Bolt in Coal Rock Mass[J]. Safety in Coal Mines, 2016, 47(7): 227-229,233.
[8]	LI Xiaolu. Numerical Simulation Research on Impact Failure Characteristics for Unloading Coal Rock Mass[J]. Safety in Coal Mines, 2015, 46(6): 43-45.
[9]	WANG Luyu, ZANG Chuanwei, WANG Zeqin, CHEN jie. A Critical Depth Calculation Model and Instability Mechanism Analysis for Roadway[J]. Safety in Coal Mines, 2015, 46(5): 220-222,226.
[10]	GU Shuancheng, WANG Enbo, SHI Xiangdong. Spandrel Failure Mechanism Analysis of Arched Roadway in Layered Rock Mass[J]. Safety in Coal Mines, 2014, 45(11): 172-175,179.

Cited By

Get Citation

PDF

XML

Article views (34) PDF downloads (20)

Turn off MathJax

Article Contents

Abstract

References

Simulation study on slip failure of roadway surrounding rocks containing weak layer

Abstract

References

Related Articles

Catalog

Simulation study on slip failure of roadway surrounding rocks containing weak layer

Abstract

References

Related Articles

Catalog

Export File

Citation

Format

Content