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The Application Research on Bolt-Mesh Support Technology of Large Cross-Section Gateway in Sihe Coal Mine

Author: SiLiJun
Tutor: ZhangDongSheng
School: China University of Mining and Technology
Course: Mining engineering
Keywords: Large section Bolting Dynamic Information Act Numerical Analysis Mine pressure measured
CLC: TD353
Type: Master's thesis
Year: 2008
Downloads: 481
Quote: 2
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Abstract


In this paper, a design the basic theory and bolt parameter of the surrounding rock stability control dynamic information as a guide , in reference to the large number of domestic and foreign bolting theory and practical experience on the basis of , on the Sihe coal mining section roadway anchor network support technology and the application of a more detailed study . Underground roadway for strength measuring device , drilling peep instrument, such as a comprehensive , systematic measurements of rock strength , in-situ stress and surrounding rock structure . Use FLAC2D finite element numerical analysis software different bolt spacing, bolt length and arrangement of the supporting effect of the multi-program , the 10201S first mining face of Sihe Coal Mine Mining Gateway retracement channel by mining affect the whole the process of system analysis , analysis of the results showed that the bolt spacing of 1000mm, bolt length 2400mm , cable supplement anchor beams, network , anchor Combined Support of the better rock controlling . Roadway excavation in the surrounding rock conditions change according to the guiding ideology of the dynamic information in a timely manner appropriate to adjust on the retracement channel support timely improvements . The analysis results show that the roof separation when the recovery of the roadway and bolt load observations : the overall stability of the surrounding rock , roof abscission layer is not greater than 18mm , ionospheric small ; Anchors does not exceed the maximum force of 160kN have sufficient supporting strength , bolting load , the maximum axial force changes 13kN able to meet the requirements of the safe and efficient production . Taken measures to install hydraulic support , plus playing the anchor rope, make-up injection of hydraulic prop in the 2302 Face retracement channel , Roof retracement channel roof during the entire end of the mining has always been in a steady state , to ensure the back withdrawal of the normal use of the channel . The above research has been successfully applied to the the the Sihe mine 10201S first mining face and 2302 Face made ??good technical and economic effect .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Mine support equipment > Roadway support
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