Mining Publication: Analysis of Global and Local Stress Changes in a Longwall Gateroad
Original creation date: January 2018
Authors: I Tulu, G Esterhuizen, D Gearhart, T Klemetti, K Mohamed, W Su
A numerical-model-based approach was recently developed for estimating the changes in both the horizontal and vertical loading conditions induced by an approaching longwall face. In this approach, a systematic procedure is used to estimate the model’s inputs. Shearing along the bedding planes is modeled with ubiquitous joint elements and interface elements. Coal is modeled with a newly developed coal mass model. The response of the gob is calibrated with back analysis of subsidence data and the results of previously published laboratory tests on rock fragments. The model results were verified with the subsidence and stress data recently collected from a longwall mine in the eastern United States.

- Analysis and Design Considerations for Superimposed Longwall Gate Roads
- Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
- Development of Numerical Models to Investigate Permeability Changes and Gas Emission around Longwall Mining Panel
- Evaluation of the Impact of Standing Support on Ground Behavior in Longwall Tailgates
- Horizontal Stress and Longwall Headgate Ground Control
- Modeling the Effects of Longwall Mining on the Ground Water System
- Performance of Roof Support Under High Stress in a U.S. Coal Mine
- Predicting Methane Emissions from Longer Longwall Faces by Analysis of Emission Contributors
- The State-of-the-Art in Coal Pillar Design
- Stress Measurements for Safety Decisions in Longwall Coal