A suite of computations was carried out to quantify the effects of the geometric parameters for the drainage layout, i.e. the number, length, spacing and location of drainage boreholes or the diameter and location of the pilot tunnel used for drainage.
Watershed management requires physiographic information, such as watershed slope, configuration of channel network, location of drainage divide, channel length, and geomorphologic parameters viz.
Many variables affect the goaf gas flow and borehole drainage efficiency, namely the gas release characteristics of gas sources, the heights of caved and fractured zones of the goaf, the location of the drainage borehole and the position of the effective drainage section (the portion of the perforated case and the uncased open hole).
4 Symptoms depend on rate of flow, location of venous drainage of CCF, inflammation, and pressure within the venous system.
The role and location of CSF drainage has been studied in both animals and humans.
The location of the effective drainage section of the borehole has significant influence on drainage performance.
The approach was to calculate and model the flow accumulation considering rural and logging roads, location of urban areas, drainage ditches, streams, gullies and permanent sediment sinks.
By analyzing the density distribution, pressure distribution, velocity field and mash methane concentration of air-methane mixed gas, obtained the locations of gas drainage hole, and summed up the methane delivery law in U type ventilation work face gob.
Therefore, the task of determining the extent, location and density of drainage systems is often difficult and expensive [22].
However, determining the extent, location and density of drainage systems is often a difficult and expensive task [22].
