During the last decade, mining companies and mobile equipment manufacturers have pursued improved efficiency, productivity, and safety in underground mining operations by automating some of the functions of underground vehicles. This paper describes the implementation and successful field testing of a new infrastructureless guidance system for autonomous tramming of centre-articulated undergrou...

Wireless underground sensor networks (WUSN) are a natural extension of the wireless sensor networks (WSN) phenomenon to the underground environment. In this work, experimental measurements are presented at the frequency of 433 MHz, which show a good agreement with the theoretical studies. Experiments are run to examine the received signal strength and the packet error rate for aboveground-to-un...

As a small island and tourist destination, Karimunjawa municipal is need fresh water to support the activity, mainly supply drinking water. Unfortunately, freshwater on obtained from groundwater which very limited vulnerable climate change anthropogenic activities. A assessment necessary receive up-to-date information quality, assess feasibility for water, determine pollutant source. The was co...

First posted September 15, 2023 For additional information, contact: Director, Virginia and West Water Science CenterU.S. Geological Survey1730 East Parham RoadRichmond, VA 23228Contact Pubs Warehouse Abandoned underground coal mine aquifers cover a large part of could supply substantial quantities water for agricultural, industrial, residential, public use. Several Federal, State, academic ins...

With power systems switching to smart grids, real-time and on-line monitoring technologies for underground distribution power cables have become a priority. Most distribution components have been developed with self-diagnostic sensors to realize self-healing, one of the smart grid functions in a distribution network. Nonetheless, implementing a real-time and on-line monitoring system for underg...

Studies about sediment erosion were mainly concentrated on the river channel sediment, the terrestrial sediment, and the underground sediment. The transport process of underground sediment is studied in the paper. The concept of the flush potential sediment is founded. The transport equation with stable saturated seepage is set up, and the relations between the flush potential sediment and wate...