Simulation of strata behaviour laws of a coal mine in Jungar Coalfield

Authors

  • Bin Zhu School of Architecture and Civil Engineering, Xi’an University of Science and Technology
  • Ge Li School of Architecture and Civil Engineering, Xi’an University of Science and Technology
  • Weifeng Kou Beijing Urban Construction Design & Development Group Co. Limited
  • Haibin Li School of Architecture and Civil Engineering, Xi’an University of Science and Technology

Abstract

For the overburden movement, the roof collapsed, severe wall caving and a range of other issues of mine ground pressure caused by exploitation process in Jungar coalfield, the author systematically studied the performance of the law of overlying strata caving, mine ground pressure and crack development when the first coal mining face was exploited by means of similar material experiment. The results prove that the pace of the immediate roof caving of the first coalface is about 15.0 m; the pace of the first weighting of the rock stratum of main roof is 45 m, an average pace of periodic weighting is 17 m. The maximum loading-increasing factor of first weighting is 1.40, and the value of loading-increasing factor of the whole weighting period is 1.32; while the distribution of the three zones of the overlying strata on the first coalface, the height of the caving zone is about 4.5 times of the average mining height, the height of fissure zone is about 14.5 times of the mining height; and bending zone is the stratum over 43 m from the coal roof, which takes on the feature of overall moving down. Therefore, a reasonable choice of mining method to reduce the thickness of the mining working face and other measures should be taken to reduce the disturbance from exploitation to overlying strata of upper goaf and the earth's surface.

References

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Published

2016-11-28

Issue

Section

Part 3 Coal