<p>This paper introduces an intelligent remote monitoring system based on zigbee. The system consists of two parts- The ground system and the underground system. The underground system consists of the sensor network that senses the environmental parameters ...

<p>The Singareni Collieries Company Ltd (SCCL )is exploiting coal in the Godavari valley coal fields spread over 5.33km2 in Andhra Pradesh, India. In the area, six workable coal seams have been identified in Barakar formation by the analysis of the geologic ...

<p>Testing of axial load transfer of various Australian cable bolts has been conducted in overseas laboratories within the last two years (Thomas, 2012). The comparative laboratory testing determined that nutcaged cables and indented wire cables provide stiffer ...

<p>This paper based on continuous monitoring underground coal mines parameter such as carbon monoxide, temperature, water level and use wireless Zigbee technology for communication. A microcontroller based system is used for collecting and storing data using ...

<p>One of the most challenging safety problems in room and pillar coal mines is roof fall phenomena during retreat mining. Roof fall not only causes fatal and non-fatal injuries on miners, stoppages in mining operations and equipment breakdowns, but ...

<p>In coal mines, whenever explosions occur, the rescue work is done by rescue workers without any prior knowledge of the environmental condition inside coal mine because the mine monitoring systems may be destroyed or damaged. This makes the life of rescue ...

<p>The bilinear brittle failure criterion that utilizes the unconfined compressive strength (UCS) and a spalling limit of 3.4, together with a tensile strength cut-off can be used to model the height of failure above coal mine roadways. Transverse isotropy ...

Between 1999 and 2007, the U.S. Geological Survey (USGS) investigated coalbed methane (CBM) resources in the Wyoming portion of the Powder River Basin (PRB) (fig. 1). The study also included the CBM resources in the North Dakota portion of the Williston Basin ...

<p>The Manual represents guidance for designers, coal operators, and regulators to meet the requirements of 30 C.F.R. 77.216(a) in designing, constructing, and maintaining dams at coal mines. The guidance provides information and suggested methods and procedures ...

Current advances in roof support automation require a fast and effective skin reinforcement of underground mine roadways. To satisfy these needs a strong and tough fibre reinforced polymeric alternative is emerging as a logical substitute to the old steel ...