MSHA HANDBOOK SERIES - PH13-V-1 - Mine Safety and Health ...

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COAL MINE SAFETY AND HEALTH GENERAL INSPECTION PROCEDURES HANDBOOK CHAPTER 3 the mine operator is obtaining air quality and quantity readings at all locations required by the standards and any approved plans. Additionally, the inspector shall determine the direction and quantity of airflow, and test for the presence of methane (CH4) and oxygen (O2) deficiency, at the following locations: 1. In the last open crosscut of each set of entries or rooms on each section; 2. Areas where mechanized mining equipment is being installed or removed; 3. On a longwall or shortwall, including areas where longwall or shortwall equipment is being installed or removed, in the intake entry or entries at the intake end of the longwall or shortwall. Approved ventilation plans for the first panel in a longwall district and the start up of each successive panel are often unique. Inspectors should review the ventilation plans carefully and focus on compliance with the plan requirements during inspection of longwalls; 4. At each end of the longwall or shortwall face at the locations specified in the approved ventilation plan; 5. At the intake end of any pillar line; 6. Where air enters the mine at each main intake; 7. In each intake split that ventilates a working section; 8. In the return of each split of air that ventilates a working section, immediately before it enters the main returns; 9. Where the air leaves the main returns; 10. The point immediately before the bleeder air enters a return; 11. In belt entries, air for each belt flight, belt air dumps, belt point feeds (for compliance with applicable standards and approved plans); 12. At least once on every E01 inspection of mines approved to use belt air to ventilate a working section at least 200 feet outby the tailpiece, but outby the point at which point feeding of air into the belt entry occurs; 13. At the measurement points specified in the mine ventilation plan for evaluating bleeders systems and worked-out areas, including where air enters and leaves the worked-out areas; 14. In the entry nearest each set of seals, immediately after the air passes the seals (airflow measurement not required); 15. In at least one location in each outby aircourse traveled during an inspection day (tests for presence of oxygen and methane only); and Release 1 (February 2013) 3-66
COAL MINE SAFETY AND HEALTH GENERAL INSPECTION PROCEDURES HANDBOOK CHAPTER 3 16. In each face, the presence of oxygen and of methane only. It should be noted that carbon dioxide (CO2) and nitric oxide (NO) are produced during the combustion of diesel fuel. These gases may pose a hazard to anyone receiving short-term exposure to harmful quantities. See chart located in section H of this chapter for additional information. In some cases, the air quantities or velocities specified in the mine ventilation plan or regulations may be inadequate to continuously dilute, render harmless, and carry away flammable, explosive, noxious, and harmful gases, dusts, smoke, and fumes. In those instances, or if the inspector determines the mine ventilation plan is not suitable to address mining conditions, the inspector should submit an MSHA Form 2000-204 (Plan Review Form) through their supervisor immediately. When an inspector observes gas detectors in use at the mine, (s)he should physically examine a representative number of the instruments to determine whether the detector(s) is turned on and functions properly, and assess the worker’s knowledge concerning their use. (Refer to Q&As 1992 Ventilation Handbook; 1996 Vent. Final Rule: 61 Fed. Reg. 9764 (March 11, 1996); and Corrections Notice 1996 Final Rule: 61 Fed. Reg. 29287 (June 10, 1996) for additional information.) Documentation Required: The results of Ventilation General Tests and Measurements (items 1 through 14 above) should be documented in the inspection notes to include the test location and the test and measurement results, until each area of the ventilation general tests and measurements is fully inspected. Methane (CH4) and oxygen (O2) tests shall be taken at each required location and recorded as a percentage. The air velocity and area (height and width of location where the required measurement was taken) shall be recorded with the air quantity calculated. In addition to completing this procedure for all outby areas, the inspector should only once clearly mark each working section air readings that contribute to the E01 inspection by date and initials on the mine tracking map, including the locations of any approved evaluation or measurement points associated with the aircourse. Release 1 (February 2013) 3-67
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TABLE OF CONTENTS Chapter 1 - INTRO
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19. Illumination of Work Areas ....
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V. Special Assessment .............
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COAL MINE SAFETY AND HEALTH GENERAL
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MSHA HANDBOOK SERIES - PH13-V-1 - Mine Safety and Health ...

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