Stability Analysis and Optimized Slope Angle for the Iron Ore Open-Pit Mine

With an increase in the overall slope height of open pit mines, stability analysis and amount of stripping waste rock becomes progressively difficult. It is necessary to optimize the overall slope angle by increasing it as much as possible with ensuring the mining safety. After comprehensive geotechnical investigation and rock mechanical laboratory tests, the combined use of limit equilibrium and numerical modeling analysis methods increases reliability and accuracy of the stability analysis. With the optimum slope design in Bizmisen iron ore mine, there will be a significant decrease in production cost and in the amount of stripping

Comparison of two closed surgical techniques at isolated pediatric radial neck fractures

Introduction: This paper aims to compare the clinical and radiological results of children operated using elastic stable intramedullary nailing as described by Métaizeau to those with the closed reduction and percutaneous pinning (CRPP). Methods: Results of 21 pediatric patients with radial neck fracture who were treated by two pediatric surgeons between January 2011 and December 2013 were reviewed retrospectively. 10 were treated with the Métaizeau method versus 11 with the CRPP. Operation time, fluoroscopic exposure time, Mayo elbow performance score (MEPS) and radiological assessment at final follow-up 1 year or greater and complications were main outcome measures. Results: The MEPS were excellent in all the patients of both groups. Reduction quality was excellent in 8 patients and good in 2 of the Métaizeau, and excellent in 9 and good in 2 of the CRPP. The fluoroscopy and operating times were statistically significantly greater, 3-fold and 2-fold respectively, in the Métaizeau method compared to the CRPP with comparable functional and radiological results. Conclusion: Surgeon should adhere to a closed surgical method of his/her experience for excellent result. Level of evidence: Therapeutic Level III. © 2018 Elsevier LtdOn behalf of authors I hereby confirm that author Mahmut KALEM, author Kerem BAŞARIR, author Hakan KOCAOĞLU, and author Ercan ŞAHİN declare that they have no conflict of interest. Author Hakan KINIK has received a speaker honorarium from Smith&Nephew Plc. This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors