Development and application of a large scale 3D roadway rockburst disaster evolution and instability simulation test system
SHI Xinshuai1,2,JING Hongwen1,ZHAO Zhenlong1,GAO Yuan1,YIN Qian1,ZOU Fengxiang1
(1. State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;2. College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)
Abstract:A large-scale three-dimensional model test system concerning rockburst disaster evolution and instability mechanism simulation,applying hydraulic loading and explosive blasting to respectively simulate in-situ stress field and dynamic load,was developed independently to investigate the impact instability process of deep roadway under the combined action of dynamic and static loads. In the whole testing process,the stress field,deformation field and geoelectric field will be obtained by using the multiple monitoring means such as parallel electrical network method,static strain acquisition system,ultra-dynamic strain acquisition system,high-speed camera and acceleration sensor. The test results show that,during the process of stress redistribution,the stress level of the surrounding rock in the shallow region of the roadway deteriorates seriously,forming a certain range of high resistance areas,while the tangential stress in the deep region of the surrounding rock appears a gradually increase trend,forming a lower resistance area. All above observations indicate that the state of the shallow surrounding rock switches from elastic to plastic,while that there is a large amount of elastic energy accumulation in the deep region,which provides favorable conditions for the occurrence of rock burst. At the moment of applying the dynamic load,the superposed force of the impact dynamic load and the high static load increases sharply and exceeds the bearing capacity of the surrounding rock,causing the broken rock mass in the shallow region of the roof to be thrown into the excavation space instantaneously accompanied by the rapid release of the elastic energy accumulated in the deep region of the surrounding rock. A large number of tensile and shear cracks are observed on the two sides of the roadway and the floor,which can be attributed to the repeated action of shock stress waves. It is shown that the test system is stable and reliable and can reproduce the process of impact instability of deep roadways realistically. The research work provides a guide for performing the failure tests of roadways with different support structures under dynamic and static loads.
史新帅1,2,靖洪文1,赵振龙1,高 远1,尹 乾1,邹凤祥1. 大尺度三维巷道冲击地压灾变演化与失稳模拟试验系统研制与应用[J]. 岩石力学与工程学报, 2021, 40(3): 556-565.
SHI Xinshuai1,2,JING Hongwen1,ZHAO Zhenlong1,GAO Yuan1,YIN Qian1,ZOU Fengxiang1. Development and application of a large scale 3D roadway rockburst disaster evolution and instability simulation test system. , 2021, 40(3): 556-565.
何满潮. 深部软岩工程的研究进展与挑战[J]. 煤炭学报,2014,39(8):1 409-1 417.(HE Manchao. Progress and challenges of soft rock engineering in depth[J]. Journal of China Coal Society,2014,39(8):1 409-1 417.(in Chinese))
[1]
康红普. 我国煤矿巷道锚杆支护技术发展60年及展望[J]. 中国矿业大学学报,2016,45(6):1 071-1 081.(KANG Hongpu. Sixty years development and prospects of rock bolting techonology for underground coal mine roadways in China[J]. Journal of China University of Mining and Technology,2016,45(6):1 071-1 081.(in Chinese))
[7]
姜耀东,赵毅鑫. 我国煤矿冲击地压的研究现状:机制,预警与控制[J]. 岩石力学与工程学报,2015,34(11):2 188-2 204.(JIANG Yaodong,ZHAO Yixin. State of the art:Investigation on mechanism,forecast and control of coal bumps in China[J]. Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2 188-2 204.(in Chinese))
[11]
杨胜利,王家臣,杨敬虎. 顶板动载冲击效应的相似模拟及理论解析[J]. 煤炭学报,2017,42(2):335-343.(YANG Shengli,WANG Jiachen,YANG Jinghu. Physical analog simulation analysis and its mechanical explanation on dynamic load impact[J]. Journal of China Coal Society,2017,42(2):335-343.(in Chinese))
[3]
ZHANG J F,JIANG F X,YANG J B,et al. Rockburst mechanism in soft coal seam within deep coal mines[J]. International Journal of Mining Science and Technology,2017,27(3):551-556.
[5]
LI X L,WANG E Y,LI Z H,et al. Rock burst monitoring by integrated microseismic and electromagnetic radiation methods[J]. Rock Mechanics and Rock Engineering,2016,49(11):4 393-4 406.(in Chinese))
[8]
李术才,王德超,王 琦,等. 深部厚顶煤巷道大型地质力学模型试验系统研制与应用[J]. 煤炭学报,2013,38(9):1 522-1 530.(LI Shucai,WANG Dechao,WANG Qi,et al. Development and application of large-scale geomechanical model test system for deep thick top coal roadway[J]. Journal of China Coal Society,2013,38(9):1 522-1 530.(in Chinese))
[13]
吕祥锋,潘一山,李忠华,等. 冲击波作用下巷道破坏规律相似模拟研究[J]. 振动与冲击,2011,30(10):212-215.(LÜ Xiangfeng,PAN Yishan,LI Zhonghua,et al. Similarity-simulation tests for failure law of a rock burst roadway under shock wave[J]. Journal of Vibration and Shock,2011,30(10):212-215.(in Chinese))
[15]
李振雷,窦林名,蔡 武,等. 深部厚煤层断层煤柱型冲击矿压机制研究[J]. 岩石力学与工程学报,2013,32(2):333-342.(LI Zhenlei,DOU Linming,CAI Wu,et al. Fault-pillar induced rock burst mechanism of thick coal seam in deep mining[J]. Chinese Journal of Rock Mechanics and Engineering,2013,32(2):333-342.(in Chinese))
[4]
齐庆新,李一哲,赵善坤,等. 我国煤矿冲击地压发展70年:理论与技术体系的建立与思考[J]. 煤炭科学技术,2019,47(9):1-40.(QI Qingxin,LI Yizhe,ZHAO Shankun,et al. Seventy years development of coal mine rockburst in China:establishment and consideration of theory and technology system[J]. Coal Science and Technology,2019,47(9):1-40.(in Chinese))
[6]
谭云亮,郭伟耀,赵同彬,等. 深部煤巷帮部失稳诱冲机制及“卸-固”协同控制研究[J]. 煤炭学报,2020,45(1):66-81.(TAN Yunliang,GUO Weiyao,ZHAO Tongbin,et al. Coal rib burst mechanism in deep roadway and “stress relief-support reinforcement”synergetic control and prevention[J]. Journal of China Coal Society,2020,45(1):66-81.(in Chinese))
[10]
JI S T,ZHANG J,PAN R K,et al. Local Acceleration Monitoring and its application in physical modelling of underground mining[J]. International Journal of Rock Mechanics and Mining Sciences,2020,128:104282.
[12]
潘一山,吕祥锋,李忠华,等. 高速冲击载荷作用下巷道动态破坏过程试验研究[J]. 岩土力学,2011,32(5):1 281-1 286.(PAN Yishan,LÜ Xiangfeng,LI Zhonghua,et al. Experimental study of dynamic failure process of roadway under high velocity impact loading[J]. Rock and Soil Mechanics,2011,32(5):1 281-1 286.(in Chinese))
[14]
窦林名,白金正,李许伟,等. 基于动静载叠加原理的冲击矿压灾害防治技术研究[J]. 煤炭科学技术,2018,46(10):1-8.(DOU Linming,BAI Jinzheng,LI Xuwei,et al. Study on prevention and control technology of rockburst disaster based on theory of dynamic and static combined load[J]. Coal Science and Technology,2018,46(10):1-8.(in Chinese))
[16]
单仁亮,黄 博,郑 赟,等. 竖向动载下巷道支护相似模拟试验装置的研制[J]. 岩土工程学报,2019,41(2):294-302.(SHAN Renliang,HUANG Bo,ZHENG Yun,et al. Development of similar simulation equipment for roadway support subjected to vertical dynamic loads[J]. Chinese Journal of Geotechnical Engineering,2019,41(2):294-302.(in Chinese))
[17]
王四巍,刘汉东,姜 彤. 动静荷载联合作用下冲击地压巷道破坏机制大型地质力学模型试验研究[J]. 岩石力学与工程学报,2014,33(10):2 095-2 100.(WANG Siwei,LIU Handong,JIANG Tong. Large geomechanical model test on failure mechanism of rockburst tunnel under static and explosive loads[J]. Chinese Journal of Rock Mechanics and Engineering,2014,33(10):2 095-2 100.(in Chinese))
[9]
FAKHIMI A,HOSSEINI O,THEODORE R. Physical and numerical study of strain burst of mine pillars[J]. Computers and Geotechnics,2016,74:36-44.