Innovative Concept In Tailgate Entry Support: Elimination Of Crib Blocks Through Utilization Of New High Capacity Roof Truss Systems (09e488b1-c200-4c40-8033-9884411485ce)

In this paper, an innovative concept in longwall tailgate support is discussed. This new concept utilizes a new high capacity roof truss system in lieu of conventional wooden crib block. The first field test was conducted at Bailey Mine and was very successful. Similar tests have been installed in other mines and seams. An extensive instrumentation plan was designed and implemented in the truss test area. The test data has shown that the dynamic roof truss system effectively controls the various abutment pressures caused by longwall mining thus maintaining a stable tailgate entry.