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Study on Technology of Pre-stressed Bolt (Cables) Supporting in Inclined Roadway

Author: KouWeiFeng
Tutor: GuShuanCheng
School: Xi'an University of Science and Technology
Course: Geotechnical Engineering
Keywords: Inclined roadway Prestressed anchor Supporting design Numerical Simulation Support monitoring
CLC: TD353
Type: Master's thesis
Year: 2008
Downloads: 338
Quote: 4
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Abstract


Coal has accounted for more than 70% of China's energy, occupies a pivotal position in the national economy. Very complex due to the occurrence conditions of the coal seam inclined coal seam widespread. The possibility of establishing suitable inclined coal seam with bolt (cable) supporting computational model to solve the inclined coal seam support, inclined coal seam smooth digging and production safety, an urgent need for in-depth study and exploration. 5867 Ulan Coal seam machine Lane main object of study, analysis Bolt (Cable) support the basic theory and design method of prestressed anchor (cable) control mechanism of action on the Tunnel made a more in-depth study of different anchoring way, the mechanical characteristics of the prestressed anchor analysis, that reasonable Bolt (Cable) prestressed into the inclined coal seam bolting parameters design , the stability of the inclined coal seam roadway has a very important significance. On the basis of theoretical analysis and field research, based on the rock loose circle theory and tilt caving arch theory, three kinds of inclined coal seam roadway roof loose circle calculation model, using computational models to determine the bolt (cable) support parameters. Inclined coal seam with bolt cut to the anchoring force carried out a systematic theoretical analysis, pointed out that the inclined coal seam with bolt shear capacity of necessity, to establish a bolt shear capacity formula. The use of finite difference software FLAC3D the Ulan Mine No. 8 coal 5867 machine Lane inclined coal seam with the establishment of a three-dimensional numerical calculation model, the inclined coal seam surrounding rock deformation and failure characteristics, said: inclined seam roadway roadway roof, the lower part of the high-top, low to help the upper and near the low to help the bottom key parts should be noted that the occurrence of the phenomenon of the roadway floor heave. The roadway roof subsidence and support parameters, the plastic zone, the stress distribution characteristics of the numerical simulation analysis to verify the safety and reliability of the supporting program. Monitoring and analysis of the convergence deformation of roadway roof separation, rock loose circle and select the test section, further validate the safety and reliability of the calculation method and support parameters. In this paper, research and practice, so inclined seam roadway engineering analogy method rise to the quantitative analysis of inclined coal seam bolt (cable) support designed to explore a new way. It is bound to play a major supporting design inclined coal seam reference.

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