Numerical Simulation of Geostress and Support of Roadway Crossing Strata in Complex Stress Condition

Abstract:

Affected by a group of underground chambers and gobs of working faces, the track sub-inclined shaft of 430 mining area in Geting coal mine, which crosses coal seam and faults repetitively, lies in high and complex stress environment. Based on geostress results measured in the field, FLAC3D numerical simulation software was used to simulate the regional geostress in the area near the roadway, referring to the impact of the gobs and chambers. And the stress variation law along the roadway was given at last. Then the roadway roof structure zone chart was drawn according to the detection results with the rock video detection recorder. Finally, stability of different sections of the roadway and the support advice corresponding to each section was gained. The results show that comprehensive consideration of geostress variation law and surrounding rock structure is necessary in the stability classification and the support of roadways. The research methods and ideas given in this paper is feasible.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 1781-1784
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.1781
• Online since: January 2012
• Authors: Tong Xu Wang, Lai Yuan Li, Wen Hai Zheng, Yang Liu, Tao Hou, Hong Yuan Qu
• Keywords: Complex Stress Condition, Numerical Simulation of Geostress, Roof Structure Detection, Stability Classification

References

[1] Alka. Agrawal: A hidden fault. Popular Science. New York, Vol. 254 (1999).

[2] RAWNSLEY. K.: Joint development in perturbed stress field near fault .J.Struct. Geol, (1992).

[3] Pande G. N. Beer G. and Williams J.R.: Numerical methods in rock mechanics, Wiley, New York. (1990).

[4] Zienkiewicz O.C., Valliappan S.and King I.P.: Stress analysis of rock as a "no-tension" material,Geotechnique,Vol.18,56-66. (1968).

DOI: 10.1680/geot.1968.18.1.56

[5] Yunfang Liu, etc: Hubei Science & Technology Press. (2000). (In Chinese)

[6] Bin Ma: Master's degree thesis of Tianjin university. (2003). (In Chinese)

[7] Tongxu Wang, Wenhai Zheng and Saijiang Liang: Numerical Simulation of Regional Stress Field under Complex Geological Condition, ICCET, (2011).