Roadheaders offer a unique capability and flexibility for the excavation of soft to medium strength rock formations, therefore, are widely used in underground mining and tunneling operations. A critical issue in successful roadheader application is the ability to develop accurate and reliable estimates of machine production capacity and the associated bit costs. This paper presents and discusse...

The main objective of this study was to investigate the performance of a roadheader used for the excavation of Küçüksu Sewage Tunnel having a length of 1037.52 m. The tunnel is located in Anatolian part of Istanbul and constructed by STFA for Istanbul Water and Sewerage Administration (ISKI). Detailed statistical analysis showed that net advance rate of the roadheader is directly influenced by ...

In view of incomplete probability information multi-objective question, it used probabilistic perturbation method and Edgeworth series technique to study reliability optimization design. The first four moments of basic random variables are known under condition. It used the Ant Colony Algorithm to design cutting head roadheader, the optimized result indicated that cutting head load fluctuation ...

Roadheader performance and related parameters are reviewed and their effects on the production and advance rate are discussed. Among the parameters influencing the machine performance, the most important one is the cutterhead design which could be optimized for a specific application. The procedures and the approach used in design optimization is reviewed. A computer program which has been deve...

A cantilever roadheader is the main tunneling equipment for underground coal mine roadways. The key to safe, efficient and intelligent development of enterprises achieve autonomous cutting control roadheader. In order realize automatic shaping a large-section roadway, path planning method secondary were studied. Wangjialing 12307 belt roadway was used as engineering background, vertical displac...

Abstract Increasing the mining depth at Praid Saline and implicitly state of stresses strains determines an increase in dimensions resistance structures (pillars ceilings). Furthermore, seismic effect generated by detonation explosives contributes to degradation structures. In order reduce destructive drilling-blasting technology a proposal is made for implementation mechanized salt cutting whi...