| Jiangcang mine is located in the western Qinghai plateau in Southern Qilian Mountains. Taking Jiangcang Coal Mine Mother Willamette for the study, theoretical analysis and computer simulation and other methods, through field investigation and laboratory testing and other engineering means, on the basis of the first Mining Face roadway deformation mechanism analysis and research on proposed site is suitable for engineering geological conditions of large dip angle coal seam extraction roadway control measures and supporting technologies and theoretical research results in the field of engineering practice, and achieved good results.First we measured the roadway surrounding rock mechanics parameters analyzed in deep inclined seam roadway excavation process may stress condition, estimate the possible direction of displacement and destruction in the form of tunnel excavation in which, initially identified roadway rock deformation and failure characteristics, thus proposed with the corresponding support ways. In the process of this calculation, the important consideration seam dip effects on surrounding rock. Secondly, the main choice for the angle roadway rock and mechanical characteristics, sub-regional arrangement anchor, choose between reasonable and anchor bolt row spacing, length and strength, combined with seam inclination, seam stress characteristics and stress the degree of concentration of the bolt arrangement stress analysis, the angle of the arrangement and bolt preload is adjusted to make it more in line with the actual situation of the coal seam, the use of computer numerical analysis method to support program development will be Simulation studies to find out the weak link, combined with theoretical calculations and computer simulations, to support programs to optimize again, to achieve the best supporting effect. Finally, the support scheme to the field practice, while the surrounding rock roadway to monitor, verify the reliability of the revised support scheme. |
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