Five mine fire experiments were conducted in a 2.08 m high and 2.90 m wide, ventilated mine entry in the National Institute for Occupational Safety and Health (NIOSH)’s Safety Research Coal Mine (SRCM) to determine the effect of the dispersion of carbon monoxide (CO) on mine fire detection. CO measurements were made at distances from 7.6 m to 45.2 m downwind from the fire with diffusion mode CO...

To effectively manage the stability of in-pit dumps with an underlying weak layer, a new plan for treatment staged floor during life mine was proposed in this study. Based on direct shear test results, properties contact surfaces between dumped spoil, and mudstone were determined. Taking Baiyinhua No.1 Open-pit Mine as example, surface spoil determined its cohesion to be 25.78 kPa, internal fri...

Differential SAR Interferometry (D-InSAR) is an effective tool in monitoring land subsidence because of its greater coverage area and better resolution of height change. A series of Japanese Earth Resources Satallite-1 (JERS-1) images from 1992 to 1998 has been used in monitoring the mine subsidence in the test site of this study, one of the important coal mining areas in China. D-InSAR procedu...

The research described in this paper was done to confirm the Upper Group 2 (UG2) PlatMine peak pillar strength formula (Watson et al., 2007), which determined from a back-analysis of failed and unfailed pillars. Underground measurements were made on stable that loaded by firstly reducing it's length then mining surrounding pillars until failure took place. instrumented with suitably positioned ...

Introduction The lowest known portion of the Poorman Formation as determined from diamond drilling and mapping is the Yates Unit. It largely comprises amphibolite, but also contains interbedded volcaniclastics, calc-silicate beds, metachert, and carbonate-rich semipelitic rocks. This unit is exposed at the surface in the Blacktail Gulch area north of Lead and continues down-plunge to the southe...

Traditional Internet public opinion hotspot tracking method is based on Text clustering, its text clustering speed and search result is not so good when handling massive webpage. The monitoring scale of Internet public opinion system is limited in the listed key words by the users, so that system cannot monitor the unknown emergency. According to the occurring and spreading features, to improve...