Surrounding rock stress distribution characterization via drilling friction resistance while rotary sounding

被引：0
|
作者：
Lyu X. [1 ]
Cao L. [1 ]
Meng L. [1 ]
Li X. [1 ]
机构：
[1] School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷 / 10期
关键词：
experimental study; friction resistance; mechanical model; rock mechanics; rotary sounding; surrounding rock stress;
D O I：
10.13722/j.cnki.jrme.2022.1192
中图分类号：
学科分类号：
摘要：
The concentrated surrounding rock stress is the fundamental force source to induce coal-rock dynamic disasters. To improve the monitoring accuracy and efficiency of the drill-cutting method，a new method to characterize the surrounding rock stress distribution characterization via borehole ultimate friction resistance is proposed based on theoretical analysis and engineering test. Firstly，the plane stress damage equation of the surrounding rock stress and drill-cutting weight is deduced，and the validity of this equation is verified by existing numerical simulation，laboratory test and engineering test results. According to the plane stress damage equation，the influence of uniformly distributed surrounding rock stress，side pressure coefficient，Young's modulus and damage factor on drill-cutting weight is analyzed. Secondly，according to the force characteristics of the drill bit，the relationship equation between the drilling parameters and borehole ultimate friction resistance is established. Finally，the engineering test was carried out through the self-developed intelligent drill-cutting system. Combined with the test results，the relationship model between the drilling parameters and drill-cutting weight is established (DP-N model)，and the DP-N model is used to characterize the surrounding rock stress distribution characteristics of 12120 working face. The results show that：(1) The drill-cutting weight shows a linear positive correlation with the uniformly distributed surrounding rock stress and side pressure coefficient，an exponential function increasing relationship with the damage factor，and a power function decreasing relationship with the Young's modulus. (2) The borehole ultimate friction resistance and drill-cutting weight have an obvious piecewise fitting characteristic. The drill-cutting weight on both sides of the piecewise point has the opposite characteristics with the borehole ultimate friction resistance，and is related to the dynamic changes of coal damage factor and Young's modulus. (3) The characterization results of DP-N model are basically consistent with the characterization results of the measured drill-cutting weight，and the average deviation of DP-N model is 11.4%. The research conclusions can provide data support for monitoring and early warning of coal-rock dynamic disasters. © 2023 Academia Sinica. All rights reserved.
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页码：2385 / 2399
页数：14
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  • [1] KAN J G, WANG P., Influencing factors of disturbance effects of blasting and driving of deep mine roadway groups[J], Shock and Vibration, 13, 1, pp. 1-13, (2021)
  • [2] SUN Y T, LI G C, ZHANG J F，, Et al., Failure mechanisms of rheological coal roadway[J], Sustainability, 7, 12, (2020)
  • [3] JIANG Yaodong, PAN Yishan, JIANG Fuxing, Et al., State of the art review on mechanism and prevention of coal bumps in China[J], Journal of China Coal Society, 39, 2, pp. 205-213, (2014)
  • [4] DOU Linming, TIAN Xinyuan, CAO Anye, Et al., Present situation and problems of coal mine rock burst prevention and control in China[J], Journal of China Coal Society, 47, 1, pp. 152-171, (2022)
  • [5] LIU Chengyu, LI Hongjun, YU Shiwei, Et al., Rockburst prediction technology combining rock mass structure analysis and electromagnetic emission monitoring—a case study of Uzbekistan Kamchik tunnel[J], Chinese Journal of Rock Mechanics and Engineering, 39, 2, pp. 349-358, (2020)
  • [6] QU Xiaocheng, JIANG Fuxing, YU Zhengxing, Et al., Rockburst monitoring and predecition technology based on equivalent drilling research and its applications[J], Chinese Journal of Rock Mechanics and Engineering, 30, 11, pp. 2346-2351, (2011)
  • [7] MU Hongwei, Study on the mechanism and monitoring and early warning technology of strong pressure behavior in close multi-seams mining, (2021)
  • [8] ZHU Liyuan, LI Zhonghua, XU Lianman, Measuring stress and strength of coal by drilling cutting torque method[J], Chinese Journal of Geotechnical Engineering, 36, 11, pp. 2096-2102, (2014)
  • [9] CHEN J, YUE Z Q., Ground characterization using breaking-action-based zoning analysis of rotary-percussive instrumented drilling[J], International Journal of Rock Mechanics and Mining Sciences, 75, pp. 33-43, (2015)
  • [10] YUE Zhongqi, Drilling process monitoring for refining and upgrading rock mass quality classification method[J], Chinese Journal of Rock Mechanics and Engineering, 33, 10, pp. 1977-1996, (2014)
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