Juniper Publishers-Mining Science Technology

 Insights in Mining Science & Technology Abstract This study focused on the advancement of e-waste techniques among electrical/electronic technicians’ workshops for sustainable healthy society. Study was conducted in Nigeria. The participants for the study included 87 university engineering lecturers and 54 public health officers. Study adopted survey research design and structured questionnaire for data collection. The study was validated by three experts and reliability coefficient of 0.79 was achieved. Data obtained was analyzed using percentage, mean and standard deviation while t-test and ANOVA were used to test hypotheses. The result claimed that all e-waste components are hazardous except aluminum. Meanwhile, the level of hazardous varies and depends on type of e-waste and level of abundance. Result claimed that e-waste in electrical/electronic technician workshop have severe consequences such as uncontrolled fire and inflammatory/respiratory problem among o...

Insights in Mining Science & Technology Abstract Efficient and safe extraction of coal from underground mines require regular/smooth caving of the hanging overlying strata in goaf which is intended to fall. Sometimes presence of extremely difficult to cave massive strata (EDTCMS) having higher strength and thickness as immediate roof delays the natural caving and affect adversely the depillaring operation in underground mines. Such EDTCMS are found globally (India, China, United States, Czech Republic) with thickness varying to hundreds of meters characterised as igneous/sedimentary formations. It is found to be lying either just immediately above or after a certain parting from the coal seam. The latter is found more frequent to the former in coalfields of the world including India. Bulking factor plays a major role in filling the void by the falling of the partition between coal seam and EDTCMS. When a large overhang of EDTCMS is created in the void then their sudden...