Section R11-1-1801. Gassy mines operated in accordance with manda- tory standards

Section R11-1-1802. Classifying mines gassy

Section R11-1-1803. Flammable gases detected

Section R11-1-1804. Men shall not smoke or carry smoking materials underground

Section R11-1-1805. Use of open flames

Section R11-1-1806. Welding or cutting underground

Section R11-1-1807. Welding or cutting in atmospheres containing more than 1.0% of flammable gases

Section R11-1-1808. Ventilation, main fans -- installation

Section R11-1-1809. Ventilation, main fans -- operation

Section R11-1-1810. Main intake and return air currents

Section R11-1-1811. Single shafts used for intake and return

Section R11-1-1812. When main fan fails or stops

Section R11-1-1813. When there has been a failure of ventilation

Section R11-1-1814. When ventilation is not restored in a reasonable time

Section R11-1-1815. When main fan or fans have been shut down

Section R11-1-1816. Booster fans -- operation

Section R11-1-1817. Booster fans -- inspection, equipment

Section R11-1-1818. Auxiliary fans -- operation

Section R11-1-1819. Auxiliary fans -- inspection

Section R11-1-1820. When auxiliary or booster fans slow down or stop

Section R11-1-1821. Volume and velocity of the current of air

Section R11-1-1826. Changes in ventilation

Section R11-1-1827. Flammable gas in excess of 1.0%

Section R11-1-1828. Flammable gas in excess of 1.5%

Section R11-1-1829. Air containing 0.25% or more of flammable gas

Section R11-1-1822. Quantity of air

Section R11-1-1823. Measuring quantity of air at least once a week

Section R11-1-1824. Permanently installed battery-charging and transformer stations

Section R11-1-1825. Intake air

Section R11-1-1830. Air inaccessible for inspection shall not be used for ventilation

Section R11-1-1831. Abandoned areas shall be sealed or ventilated

Section R11-1-1832. Seals shall be of substantial construction

Section R11-1-1833. Sampling of atmosphere and measurement of pressure

Section R11-1-1834. Crosscuts

Section R11-1-1835. Crosscuts closed

Section R11-1-1836. Line brattice or other suitable devices

Section R11-1-1837. Brattice cloth

Section R11-1-1838. Damaged brattices

Section R11-1-1839. Crosscuts provided

Section R11-1-1840. Entries or rooms shall not be started off entries

Section R11-1-1841. Stoppings in crosscuts between intake and return airways

Section R11-1-1842. Stoppings airtight

Section R11-1-1843. Main ventilation

Section R11-1-1844. Air locks shall be ventilated sufficiently

Section R11-1-1845. Doors shall be kept closed

Section R11-1-1846. Overcasts and undercasts

Section R11-1-1847. Preshift examinations

Section R11-1-1848. Qualified examiners

Section R11-1-1849. Danger signs shall not be removed

Section R11-1-1850. Examinations for dangerous conditions

Section R11-1-1851. Prompt action to correct dangerous conditions

Section R11-1-1852. Diesel-powered equipment

Section R11-1-1853. Trolley wires and trolley feeder wires

Section R11-1-1854. Only permissible equipment maintained

Section R11-1-1855. Only permissible distribution boxes shall be used

Section R11-1-1856. Electrical equipment

Section R11-1-1857. Illumination

Section R11-1-1858. Explosives not designated permissible by Bureau of Mines

Section R11-1-1859. Granting approval of unpermissible explosives

Section R11-1-1860. Blasts in gassy mines shall be initiated electrically

Section R11-1-1861. Boreholes stemmed

Section R11-1-1862. Examinations for flammable gas

Section R11-1-1863. Shots or rounds shall not be fired

Section R11-1-1864. Shots or rounds should be fired by qualified per- sons