Journal of Mining & Safety Engineering ›› 2012, Vol. 29 ›› Issue (2): 178-184.

Previous Articles     Next Articles

Study on Deformation Mechanism and Stability Control of Surrounding Rock in Roadway for Deep Underground Mining of Oil Shale

  

  • Received:2011-09-30 Online:2012-03-15 Published:2011-12-22

Abstract:  According to the situation that the typical roadway of oil shale at the middle Jurassic period in Yaojie mine field,Minhe basin,could not meet the normal need of using. In this paper,we combined with the sedimentary environment and main physical and chemical properties of oil shale,used the nonlinear strength degradation creep model of surrounding rock,numerical simulation to analysis the rule of stress and deformation speed of surrounding with time,and pointed out that the massive clay mineral in oil shale with the influence of weathering and water physical easily swells and collapses.While time effect on the strength of surrounding rock and unreasonable support parameter plays an important role in the stability of surrounding rock.Based on the previous study,the appropriated rock control technology of “high resistance and yield pattern,occlude crack,cut off the water ” has been concluded.Through the use of high pressure yielding anchor bolt with butterfly pallet,guniting and grouting,the stability of surrounding rock has been implemented.Compared with former support technology,the result showed that control technology of surrounding rock proposed effectively,reduced the deformation of surrounding rock and guaranteed the stability in the field application in the concentration transportation roadway 800-850m in deep.

Key words: oil shale, creep, yielding support, surrounding rock control