The prerequisite of maintaining an efficient and safe mining operation is the proper design of a mine by considering all aspects. The first step in a coal mine design is a realistic geometrical modelling of the coal seam(s). The structural features such as faults and folding must be reliably implemented in 3D seam models. Upon having a consistent seam model, the attributes such as calorific val...

A novel modeling method for 3D curve welding seam is presented in this paper based on a welding robot for large workpiece. The 3D curve welding seam tracking is implemented by macro and micro motion which can control translational motion of torch in a large range and implement accurate seam tracking in small range. As such, the self-teaching seam model and real-time seam model are established t...

PT.X, a coal mining company in South Kalimantan, Indonesia, plans to use the highwall method excavate marginal reserves on final slope maintain production. However, stability of and determination dimensions are major concerns due unfavourable rock mass conditions caused by intensive weathering tectonics. This paper aims evaluate feasibility study area using empirical, analytical numerical metho...

Robot automation increases productivity, the product quality and frees man from involuntary, unhealthy and dangerous work. While computational power has increased exponentially during the last decades, the limitations in flexibility constitute today a bottleneck in the further evolution of robotic systems. One application for intelligent systems is seam tracking in robotic welding. Seam trackin...

Pillow is an interactive pattern-design system for creating plush toys. The user imports a 3D surface model into the system and specifies the segmentation boundaries interactively by drawing seam lines on the model surface. Based on this segmentation, the system generates a 2D pattern by flattening each outlined region, and then visualizes the shape of the resulting plush toy by applying a simp...

The application of geological controls in orebody evaluation and modelling is critical. Stratigraphic orebodies require more accurate location in space and better seam boundary definition. This is achieved by either modelling boundary surfaces of the orebodies or their thickness at specific points in 3D space. Structurally deformed stratigraphic deposits pose a very special problem in variograp...

Because of their construction and flexibility, industrial robots are suitable to be used, with a laser source and an optical fiber, for laser welding of 3D products. However, the positioning accuracy of robots are insufficient for laser welding. Also the product and clamping tolerances are too wide for laser welding. These problems can be solved by applying sensors, which measure the location o...

This paper presents the design and validation of a novel and universal 6D seam tracking system that reduces the need of accurate robot trajectory programming and geometrical databases in robotic arc welding. Such sensor driven motion control together with adaptive control of the welding process is the foundation for increased flexibility and autonomous behavior of robotic and manufacturing syst...

Laser welding requires quite high trajectory accuracy of articulated welding robot. To increase this dynamic trajectory accuracy, a novel 3D seam tracking method is proposed based on stereo visual feedback control, in which a key task is to detect the seam from the vision image. To improve the precision and efficiency of the GPI seam-detecting method, this paper proposed a new method, the multi...

INTRODUCTION The use of Top Coal Caving for exploiting the thick coal seam with shallow buried depth most likely has a strong negative impact on the stability. CASE DESCRIPTION Anjialing No. 1 Underground Mine is located in Shuozhou City, Shanxi Province of China. The 4# Coal Seam of this coal mine is the thick coal seam with shallow buried depth, which has the thickness of 12 m and the depth...