Case Study:

Supply of Engineered 120 PSI Monolithic Plug Seals

Project Overview

As with all longwall mines in NSW, Tahmoor is required to seal their extracted longwall panels. As a mine in the Bulli Seam, Tahmoor has a significant gas make and the control of gas is a major focus.

Mine Projects has enjoyed a strong working relationship with Tahmoor operations for over a decade and has observed a significant reduction in leakage compared to previous sealing methods. This improvement has led to increased production time, owing to better control of gas and water in the area.

Challenges

Tahmoor Colliery, with its extensive operations and significant working areas, faces considerable challenges;

• High gas make from longwall mining operations
• Significant cut-through closure post longwall mining.
• Significant water make from longwall
• Long travel distances required for material transport
• Low seam height for access of equipment.

Tahmoor 120 Psi Seal prior to sealing showing water issue that had to be overcome issuing from the 6” water standpipe.

Solution

A 120 PSI rated seal was designed for Tahmoor’s unique operating conditions. The seal included strain-hardening material which allows convergence without compromising the seal integrity. With the use of StrataPlug® as the the seal infill, the bearing area of the seal was increased and was able to effectively reduce atmosphere and water transfer.

Results

From the implementation of MPA seals, mine staff were better able to proactively manage water and gas, leading to reduced downtime on the longwall and much more efficient water management. As a result, the mine experienced increased production time and output, with ventilation related delays reduced.