![A Liquid Settlement System for Measuring Roof Sag during Development Mining—A Comparison between Place Change Mining and a Miner-Bolter A Liquid Settlement System for Measuring Roof Sag during Development Mining—A Comparison between Place Change Mining and a Miner-Bolter](https://www.agapito.com/wp-content/uploads/bfi_thumb/dummy-transparent-qpk3ecabg80yhjvwqpy0gvpopz3xg0gi3kj6rcz6i4.png)
A Liquid Settlement System for Measuring Roof Sag during Development Mining—A Comparison between Place Change Mining and a Miner-Bolter
2014 International Ground Control Conference on Mining, July 29-31, Morgantown, West Virginia, USA Authors: Andy Shaffer (AAI) and James D. Pile (BHP Billiton) A novel liquid settlement system [...]