Taking a super large deep foundation pit project as an example, the horizontal displacement of crown beam and driveway, surface settlement, axial force anchor cable, underground water level in construction process are dynamically monitored analyzed. The excavation deformation rule influence on surrounding buildings results show that, with pit, driveway incline towards direction eventually tend ...

The transmission and radiation of underground variable frequency electromagnetic waves will seriously interfere with the operation power cable its surrounding environment. At present, test methods for cables basically require impedance system to match characteristic cable. defect is that process designing making matching network relatively complex requires high manufacturing accuracy. In order ...

Silicosis and coal worker's pneumoconiosis are serious occupational respiratory diseases associated with the coal mining industry and the inhalation of respirable dusts containing crystalline silica. The purpose of this study (funded by the Mine Health and Safety Council of South Africa) was to evaluate the individual contributions of underground coal mining tasks to the respirable dust and res...

the load transfer mechanisms of cable bolts differ from those for normal rebar bolts. the cable bolts used in mines are basically steel strands with different constructions depending on the number of wires or elements and the way they are laid. tendon bolts (rebar and cable) are normally evaluated for their strength and load transfer properties. the tendon strength can be evaluated by the tensi...

The calculation of the continuous allowable current an underground cable is determined by various characteristics. To calculate in cables with alternating magnetic fields such as AC, special phenomena proximity effect and skin must be applied. However, there are no standards or research related to a DC power that does not have field. In this paper, quantitative formula direct burial laying was ...