See also: NIOSH mining products
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Type: | |
Paper and Pencil Exercise |
Audience: | |
Underground coal |
Length: | |
29 questions |
Skills Reviewed: | |
Recognizing unsafe mining practices, Assessing changes in roof stability, Recognizing safe ways to clean up or re-support roof falls |
You work at a mine that has approval to make 34 ft cuts using a remote controlled continuous miner. The roof bolting machine has broken down. The continuous miner has just been refitted with a new cutting head and bits that cut the coal much faster. The two roof bolter operators have been having a hard time keeping up with Bull, the continuous miner operator. At the face of #4 entry, Bull makes a 40 ft extended cut, trams back from the face, and then turns the miner and cuts the left-hand crosscut all the way through to the #3 entry. When the roof bolter operators discover Bull's "double header", they get the section foreman, and then try to plan a safe way to bolt this large area of unsupported roof. Shortly after they complete their assessment and plan of attack, a large roof fall occurs. Now the face crew must decide how to safely clean up the fall while advancing roof support.
Materials needed: | |
Instructor Copy
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Problem Booklet
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1 for each trainee. May be downloaded separately or duplicated from the Instructor´s Copy. | |
Answer Sheet
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1 for each trainee. May be downloaded separately or duplicated from the Instructor´s Copy. | |
Optional |
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Overhead projector and overheads of the Master Answer Sheet and Scoring Key found in the Instructor's Copy. | |
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