Evaluation of stress-control layout at the Subtropolis Mine,Petersburg,Ohio  

作　　者：Anthony Iannacchione Tim Miller Gabriel Esterhuizen Brent Slaker Michael Murphy Natalie Cope Scott Thayer 

机构地区：[1]Department of Civil and Environmental Engineering,University of Pittsburgh,Pittsburgh,PA 15216,USA [2]East Fairfield Coal Company,North Lima,OH 44452,USA [3]National Institute for Occupational Safety and Health(NIOSH),Pittsburgh Mining Research Division,Pittsburgh,PA 15236,USA [4]Mine Vision Systems Inc.,Pittsburgh,PA 1520,USA

出　　处：《International Journal of Mining Science and Technology》2020年第1期77-83,共7页矿业科学技术学报（英文版）

摘　　要：The Subtropolis room-and-pillar mine extracts the Vanport Limestone(Allegheny Formation,Pennsylvanian System)near Petersburg,Ohio.Strata instability problems associated with excessive concentrations of lateral stress caused the mine operator to implement a change in layout design.This mining method has been identified as a stress control layout and has been used by other underground stone mines in the past with varying degrees of success.Practical experience has shown that entry headings advance in the direction of the principal lateral stress,producing lower stress concentrations with better mining conditions.It is important to minimize stress concentrations along the mining front,so an arrowshaped advance is recommended.This technique advances more developments(headings)in a"good"direction and reduces developments(crosscuts)in the"bad direction."As is expected,the stress control layout enhances the potential for shear failures in crosscuts.It is,therefore,important to focus crosscut engineering interventions that either:(a)lower stress concentrations(for example,an arched roof)or(b)enhance strength of the strata containing the shears(for example,rock reinforcement).This study focuses on observing strata conditions on a regular basis and monitoring the response of these strata to changing geologic and mining conditions through 3D Dynamic LiDAR scans.

关 键 词：Horizontal STRESS Stress-control LAYOUTS Underground stone mines 

分 类 号：TD32[矿业工程—矿井建设] TD876.3