Deformation control technology for gangue slope of roof cutting retained roadways at high mining height fully mechanized face
To solve the problem of gangue slope wall rock control in thick coal large mining height fully mechanized face,we theoretically analyzed and set up the mechanical formula for gangue slope migration under different gangue prevention supports.We put forward gangue slope deformation control methods which can reduce gangue slope deformation stress and increase the anti-deformation support.Based on filed measurement and design,four plans of two category for gangue blocking support were employed to explore the control effect.The results show that:①Strengthening the support strength of the gangue-wall side roof can reduce the deformation pressure of this side;②Increasing the number of hoops,increasing the pre-tension force of clamps,and enhancing the friction between U-shaped steels can increase the initial sliding stress of U-shaped steel and enhance the deformation resistance of gangue-wall side;③The control effect of gangue support schemes can be ranked as:two hoops plus one support＜two hoops plus unit supports＜two hoops plus unit supports and an auxiliary support＜three hoops plus unit supports.This technology provides a reference for gangue-wall support under similar conditions.
thick coal seamroof cutting retained roadwaygangue slopegangue blocking support
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