Introduction. High productivity in mining processes is possible only with sufficient consistency between processes: drilling – blasting excavation transportation. The relationships and are most well studied, although there also a number of issues related to the interpretation data choice efficiency criteria. further link by transportation incomplete, therefore, no clear direction systematic coo...

Purpose. Studying the stress-strain state of rock mass under open pit, taking into account change in open-pit bottom width order to reveal geomechanical and determine safe parameters bridge. Methods. The peculiarities formation transition zone have been studied according methodology using numerical research methods geological strength index (GSI). Using this index, it is possible take fracturin...

Abstract When highwall mining technology is applied to recover large amounts of residual coal left under the a big open-pit mine, reasonable pillar width required ensure stability web pillars. Using numerical simulations, this paper studied characteristics abutment stress distribution in pillars different slope angles and depths, established relation describing pillar. The relationship between ...

This research project developed an adaptive stochastic optimisation approach for multi-period production scheduling in open-pit mines under geological uncertainty, and compared it to existing two-stage method. new rolling-horizon updates the model each time period as information becomes available. Numerical tests carried out earlier on open-pits of different sizes showed that, average, policy g...

The mammalian pit-1 gene encodes a 33 kd transcription factor (1,2) expressed in a subset of endocrine cells of the anterior pituitary (3). Pit-1 is structurally related to the POU family of transcriptional regulators (4), containing a characteristic POU domain divided into two regions, the POU-specific and homeo subdomains. Located in the C-terminal half of the protein, the POU domain is criti...

BACKGROUND In rural Bangladesh, India and elsewhere, pour-flush pit latrines are the most common sanitation system. When a single pit latrine becomes full, users must empty it themselves and risk exposure to fresh feces, pay an emptying service to remove pit contents or build a new latrine. Double pit pour-flush latrines may serve as a long-term sanitation option including high water table area...