Material Stress Analysis of Hydraulic Support in Deeply Inclined Top Coal Caving Face Based on Virtual Prototyping Technology

Abstract:

Modeling hydraulic support used in deeply inclined top coal caving face by using virtual prototyping technology and analyzing support structural parts using COSMOS/Works, which is inner set in the Solidworks software. The result mainly reflects hydraulic support material stress characteristics, and therefore provides direction and reference for design improvement.

• Periodical: Advanced Materials Research (Volume 568)
• Pages: 230-233
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.568.230
• Online since: September 2012
• Authors: Lian Min Cao, Wen Ming Zhao
• Keywords: Coal Caving, Hydraulic Support, Inclined Top, Virtual Prototyping

References

[1] Top beam bears circular centralized load;(2) general support top beam front-end bears torsional load;(3) general support top beam back-end bears torsional load;(4) general support bears bias load;(5) general support top beam two ends bears centralized load;(6) support top beam bears strip-shaped centralized load;(7) the middle of support base bears centralized load;(8) general support base two ends bears centralized load; (9) general support base front-end bears torsional load (10) general support base back-end bears torsional load. Take the (4) condition as an example, after material parameters definition, mesh generation, boundary condition definition (constraint and load), material stress calculation and so on, the calculated result material stress nephogram is shown in figure 2. Fig. 2 Material stress map After analyze the ten results, what we conclude as follows:

DOI: 10.4271/air44

[1] The material stress value and deformation of the region near the pillar socket and cushion block are larger; (2) When general support top beam bears torsional load, pin in the top beam back-end and shield beam left-end bear the largest material stress, at the same time, front and rear linkage bars, shield beam and hinge joint bear larger material stress; (3) When top beam bears strip-shaped centralized load, rear linkage bar, shield beam and base hinge joint bear larger material stress; (4) When support base both two ends bears centralized load, the rear linkage bar base pin bears the largest material stress, and the other hinge joints bear uniform material stress; (5) When support base bears torsional load, the base rear end and the pin in the right end of front linkage bar base bear the largest material stress. The support intensity analysis shows that, the calculated result is very close to the measured result in laboratory, the locations bear the largest material stress are reasonable, and they reflect the support material stress characteristics basically. Distribution of the largest material stress is exist manifested as regionality and locality, so in actual design work, the high strength plate must be used in these regions. Conclusion In the support design process, the result mainly reflects hydraulic support material stress characteristics and scheme can be evaluated by making full use of virtual prototype technology. It provides direction for improvement of design, so it is necessary and feasible. Acknowledgment The paper is sponsored by Project for Scientific development plan of Shandong Province (No. 2011GGX10320), Doctoral Fund of Ministry of Education of PRC No: 20113718110006，Scientific research innovation team supporting plan of Shandong University of science and technology.