{"formats":[{"name":"JSON","format":"json","url":"\/downloads\/2025\/code-json\/45.2-842.json"},{"name":"Plain Text","format":"text","url":"\/downloads\/2025\/code-text\/45.2-842.txt"},{"name":"XML","format":"xml","url":"\/downloads\/2025\/code-xml\/45.2-842.xml"},{"name":"HTML","format":"html","url":"\/downloads\/2025\/code-html\/45.2-842.html"}],"law_id":86254,"edition_id":1,"section_id":86254,"structure_id":14031,"section_number":"45.2-842","catch_line":" Ventilation controls","history":"Code 1950, \u00a7 45-60.4; 1954, c. 191; 1966, c. 594, \u00a7 45.1-60; 1993, c. 442; 1994, c. 28, \u00a7 45.1-161.225; 1996, c. 774; 2005, c. 3; 2021, Sp. Sess. I, c. 387.","full_text":"A\n\nVentilation shall be so arranged by means of air locks, overcasts, or undercasts that the passage of a haulage trip or person along the entries will cause no interruption of the air current. Each air lock shall be ventilated sufficiently to prevent an accumulation of methane therein.B\n\nAir lock doors that are used in lieu of permanent stoppings or to control ventilation within an air course shall be (i) made of incombustible material or coated on all accessible surfaces with flame-retardant material having a flame spread index of 25 or less as tested under ASTM E162 and (ii) of sufficient strength to serve their intended purpose of maintaining separation and permitting travel between or within air courses or entries.C\n\nTo provide easy access between the return, belt, and intake escapeway entries, substantially constructed man-doors that are properly marked so as to be readily detected shall be installed in at least every fifth crosscut in the stopping line separating such entries.D\n\nDoors shall be kept closed except when a miner or piece of equipment is passing through the doorway. Any motor crew or other miner who opens such doors shall see that they are closed before leaving them.E\n\nOvercasts, undercasts, and regulators shall be well-constructed; of incombustible material, such as masonry, concrete, concrete block, or prefabricated metal; and (i) of sufficient strength to withstand possible falls from the roof, (ii) of ample area to pass the required quantity of air, and (iii) kept clear of obstructions.","order_by":null,"text":{"0":{"id":308940,"text":"Ventilation shall be so arranged by means of air locks, overcasts, or undercasts that the passage of a haulage trip or person along the entries will cause no interruption of the air current. Each air lock shall be ventilated sufficiently to prevent an accumulation of methane therein.","type":"section","prefixes":["A"],"prefix":"A","entire_prefix":"A","prefix_anchor":"A","level":1,"next_prefix":"B"},"1":{"id":308941,"text":"Air lock doors that are used in lieu of permanent stoppings or to control ventilation within an air course shall be (i) made of incombustible material or coated on all accessible surfaces with flame-retardant material having a flame spread index of 25 or less as tested under ASTM E162 and (ii) of sufficient strength to serve their intended purpose of maintaining separation and permitting travel between or within air courses or entries.","type":"section","prefixes":["B"],"prefix":"B","entire_prefix":"B","prefix_anchor":"B","level":1,"prior_prefix":"A","next_prefix":"C"},"2":{"id":308942,"text":"To provide easy access between the return, belt, and intake escapeway entries, substantially constructed man-doors that are properly marked so as to be readily detected shall be installed in at least every fifth crosscut in the stopping line separating such entries.","type":"section","prefixes":["C"],"prefix":"C","entire_prefix":"C","prefix_anchor":"C","level":1,"prior_prefix":"B","next_prefix":"D"},"3":{"id":308943,"text":"Doors shall be kept closed except when a miner or piece of equipment is passing through the doorway. Any motor crew or other miner who opens such doors shall see that they are closed before leaving them.","type":"section","prefixes":["D"],"prefix":"D","entire_prefix":"D","prefix_anchor":"D","level":1,"prior_prefix":"C","next_prefix":"E"},"4":{"id":308944,"text":"Overcasts, undercasts, and regulators shall be well-constructed; of incombustible material, such as masonry, concrete, concrete block, or prefabricated metal; and (i) of sufficient strength to withstand possible falls from the roof, (ii) of ample area to pass the required quantity of air, and (iii) kept clear of obstructions.","type":"section","prefixes":["E"],"prefix":"E","entire_prefix":"E","prefix_anchor":"E","level":1,"prior_prefix":"D"}},"ancestry":[{"id":14031,"edition_id":1,"name":"Ventilation, Mine Gases, and Other Hazardous Conditions","identifier":"4","label":"article","depth":5,"order_by":1,"parent_id":14030,"metadata":{},"date_created":"2026-06-26 03:46:38","date_modified":"2026-06-26 03:46:38","permalink":{"id":223537,"object_type":"structure","relational_id":14031,"identifier":"4","token":"45.2\/II\/B\/8\/4","url":"\/45.2\/II\/B\/8\/4\/","edition_id":1,"permalink":0,"preferred":1}},{"id":14030,"edition_id":1,"name":"Requirements Applicable to Underground Coal Mines; Electricity, Safety, Etc","identifier":"8","label":"chapter","depth":4,"order_by":1,"parent_id":12986,"metadata":{},"date_created":"2026-06-26 03:46:38","date_modified":"2026-06-26 03:46:38","permalink":{"id":223425,"object_type":"structure","relational_id":14030,"identifier":"8","token":"45.2\/II\/B\/8","url":"\/45.2\/II\/B\/8\/","edition_id":1,"permalink":0,"preferred":1}},{"id":12986,"edition_id":1,"name":"Underground Coal Mines","identifier":"B","label":"part","depth":3,"order_by":1,"parent_id":12985,"metadata":{},"date_created":"2026-06-26 03:44:06","date_modified":"2026-06-26 03:44:06","permalink":{"id":223095,"object_type":"structure","relational_id":12986,"identifier":"B","token":"45.2\/II\/B","url":"\/45.2\/II\/B\/","edition_id":1,"permalink":0,"preferred":1}},{"id":12985,"edition_id":1,"name":"Coal Mining","identifier":"II","label":"subtitle","depth":2,"order_by":1,"parent_id":12713,"metadata":{},"date_created":"2026-06-26 03:44:06","date_modified":"2026-06-26 03:44:06","permalink":{"id":222647,"object_type":"structure","relational_id":12985,"identifier":"II","token":"45.2\/II","url":"\/45.2\/II\/","edition_id":1,"permalink":0,"preferred":1}},{"id":12713,"edition_id":1,"name":"Mines, Minerals, and Energy","identifier":"45.2","label":"title","depth":1,"order_by":1,"parent_id":null,"metadata":{},"date_created":"2026-06-26 03:43:49","date_modified":"2026-06-26 03:43:49","permalink":{"id":222539,"object_type":"structure","relational_id":12713,"identifier":"45.2","token":"45.2","url":"\/45.2\/","edition_id":1,"permalink":0,"preferred":1}}],"structure_contents":[{"id":61647,"structure_id":14031,"section_number":"45.2-826","catch_line":" Pre-shift examinations","url":"\/45.2-826\/","token":"45.2\/II\/B\/8\/4\/45.2-826","metadata":false},{"id":75532,"structure_id":14031,"section_number":"45.2-827","catch_line":" On-shift examinations","url":"\/45.2-827\/","token":"45.2\/II\/B\/8\/4\/45.2-827","metadata":false},{"id":84889,"structure_id":14031,"section_number":"45.2-828","catch_line":" Weekly examinations","url":"\/45.2-828\/","token":"45.2\/II\/B\/8\/4\/45.2-828","metadata":false},{"id":55121,"structure_id":14031,"section_number":"45.2-829","catch_line":" Examinations of fans","url":"\/45.2-829\/","token":"45.2\/II\/B\/8\/4\/45.2-829","metadata":false},{"id":78974,"structure_id":14031,"section_number":"45.2-830","catch_line":" Record of examinations","url":"\/45.2-830\/","token":"45.2\/II\/B\/8\/4\/45.2-830","metadata":false},{"id":73101,"structure_id":14031,"section_number":"45.2-831","catch_line":" Notice of hazardous conditions","url":"\/45.2-831\/","token":"45.2\/II\/B\/8\/4\/45.2-831","metadata":false},{"id":56771,"structure_id":14031,"section_number":"45.2-832","catch_line":" Notice of monitor tampering prohibition","url":"\/45.2-832\/","token":"45.2\/II\/B\/8\/4\/45.2-832","metadata":false},{"id":84902,"structure_id":14031,"section_number":"45.2-833","catch_line":" Main fans","url":"\/45.2-833\/","token":"45.2\/II\/B\/8\/4\/45.2-833","metadata":false},{"id":64758,"structure_id":14031,"section_number":"45.2-834","catch_line":" Fan stoppage plan","url":"\/45.2-834\/","token":"45.2\/II\/B\/8\/4\/45.2-834","metadata":false},{"id":61736,"structure_id":14031,"section_number":"45.2-835","catch_line":" Auxiliary fans","url":"\/45.2-835\/","token":"45.2\/II\/B\/8\/4\/45.2-835","metadata":false},{"id":78287,"structure_id":14031,"section_number":"45.2-836","catch_line":" Quantity of air","url":"\/45.2-836\/","token":"45.2\/II\/B\/8\/4\/45.2-836","metadata":false},{"id":81164,"structure_id":14031,"section_number":"45.2-837","catch_line":" Bleeder systems","url":"\/45.2-837\/","token":"45.2\/II\/B\/8\/4\/45.2-837","metadata":false},{"id":55504,"structure_id":14031,"section_number":"45.2-838","catch_line":" Coursing of air","url":"\/45.2-838\/","token":"45.2\/II\/B\/8\/4\/45.2-838","metadata":false},{"id":75203,"structure_id":14031,"section_number":"45.2-839","catch_line":" Actions for excessive methane","url":"\/45.2-839\/","token":"45.2\/II\/B\/8\/4\/45.2-839","metadata":false},{"id":75918,"structure_id":14031,"section_number":"45.2-840","catch_line":" Crosscuts","url":"\/45.2-840\/","token":"45.2\/II\/B\/8\/4\/45.2-840","metadata":false},{"id":78688,"structure_id":14031,"section_number":"45.2-841","catch_line":" Permanent stoppings","url":"\/45.2-841\/","token":"45.2\/II\/B\/8\/4\/45.2-841","metadata":false},{"id":86254,"structure_id":14031,"section_number":"45.2-842","catch_line":" Ventilation controls","url":"\/45.2-842\/","token":"45.2\/II\/B\/8\/4\/45.2-842","metadata":false},{"id":59441,"structure_id":14031,"section_number":"45.2-843","catch_line":" Line brattice","url":"\/45.2-843\/","token":"45.2\/II\/B\/8\/4\/45.2-843","metadata":false},{"id":70834,"structure_id":14031,"section_number":"45.2-844","catch_line":" Ventilation with air from certain areas","url":"\/45.2-844\/","token":"45.2\/II\/B\/8\/4\/45.2-844","metadata":false},{"id":64318,"structure_id":14031,"section_number":"45.2-845","catch_line":" Worked-out areas","url":"\/45.2-845\/","token":"45.2\/II\/B\/8\/4\/45.2-845","metadata":false},{"id":74385,"structure_id":14031,"section_number":"45.2-846","catch_line":" Air quality","url":"\/45.2-846\/","token":"45.2\/II\/B\/8\/4\/45.2-846","metadata":false},{"id":71388,"structure_id":14031,"section_number":"45.2-847","catch_line":" Examination of mine for explosive gas and other hazardous conditions","url":"\/45.2-847\/","token":"45.2\/II\/B\/8\/4\/45.2-847","metadata":false},{"id":86482,"structure_id":14031,"section_number":"45.2-848","catch_line":" Tampering with methane monitoring devices prohibited; penalty","url":"\/45.2-848\/","token":"45.2\/II\/B\/8\/4\/45.2-848","metadata":false},{"id":66298,"structure_id":14031,"section_number":"45.2-849","catch_line":" Allowing persons to work in mine where methane monitoring equipment disconnected; penalty","url":"\/45.2-849\/","token":"45.2\/II\/B\/8\/4\/45.2-849","metadata":false},{"id":77699,"structure_id":14031,"section_number":"45.2-850","catch_line":" Intentionally bypassing a safety device; prohibition","url":"\/45.2-850\/","token":"45.2\/II\/B\/8\/4\/45.2-850","metadata":false},{"id":68872,"structure_id":14031,"section_number":"45.2-851","catch_line":" Control of coal dust","url":"\/45.2-851\/","token":"45.2\/II\/B\/8\/4\/45.2-851","metadata":false},{"id":79750,"structure_id":14031,"section_number":"45.2-852","catch_line":" Rock dusting","url":"\/45.2-852\/","token":"45.2\/II\/B\/8\/4\/45.2-852","metadata":false}],"previous_section":{"id":78688,"structure_id":14031,"section_number":"45.2-841","catch_line":" Permanent stoppings","url":"\/45.2-841\/","token":"45.2\/II\/B\/8\/4\/45.2-841","metadata":false},"next_section":{"id":59441,"structure_id":14031,"section_number":"45.2-843","catch_line":" Line brattice","url":"\/45.2-843\/","token":"45.2\/II\/B\/8\/4\/45.2-843","metadata":false},"metadata":false,"official_url":"https:\/\/law.lis.virginia.gov\/vacode\/45.2-842\/","history_text":"<p>The record of this law\u2019s original creation isn\u2019t available online. It has been modified 6 times. Those modifications are cataloged by \u201cThe Acts of Assembly,\u201d a state publication, by year and chapter. Those modifications that can be read on the General Assembly\u2019s website will be linked accordingly. Those modifications are as follows: in 1954, chapter 191; in 1966, chapter 594; in 1993, chapter 442; in 1994, chapter <a href=\"https:\/\/legacylis.virginia.gov\/cgi-bin\/legp604.exe?941+ful+CHAP0028\">28<\/a>; in 1996, chapter <a href=\"https:\/\/legacylis.virginia.gov\/cgi-bin\/legp604.exe?961+ful+CHAP0774\">774<\/a>; in 2005, chapter <a href=\"https:\/\/legacylis.virginia.gov\/cgi-bin\/legp604.exe?051+ful+CHAP0003\">3<\/a>.<\/p>","references":false,"refers_to":false,"permalink":{"id":223603,"object_type":"law","relational_id":86254,"identifier":"45.2-842","token":"45.2\/II\/B\/8\/4\/45.2-842","url":"\/45.2-842\/","edition_id":1,"permalink":0,"preferred":1},"url":"\/45.2-842\/","token":"45.2\/II\/B\/8\/4\/45.2-842","dublin_core":{"Title":" Ventilation controls","Type":"Text","Format":"text\/html","Identifier":"\u00a7 45.2-842","Relation":"Code of Virginia"},"html":"\n\t\t\t\t\t\t<section id=\"A\"><p><span class=\"prefix-number\">A.<\/span> Ventilation shall be so arranged by means of air locks, overcasts, or undercasts that the passage of a haulage trip or person along the entries will cause no interruption of the air current. Each air lock shall be ventilated sufficiently to prevent an accumulation of methane therein. <a id=\"paragraph-308940\" class=\"section-permalink\" href=\"https:\/\/vacode.org\/45.2-842\/#A\"><i class=\"fa fa-link\"><\/i><\/a><\/p><\/section>\n\t\t\t\t\t\t<section id=\"B\"><p><span class=\"prefix-number\">B.<\/span> Air lock doors that are used in lieu of permanent stoppings or to control ventilation within an air course shall be (i) made of incombustible <span class=\"dictionary\">material<\/span> or coated on all accessible surfaces with flame-retardant <span class=\"dictionary\">material<\/span> having a flame spread index of 25 or less as tested under ASTM E162 and (ii) of sufficient strength to serve their intended purpose of maintaining separation and permitting travel between or within air courses or entries. <a id=\"paragraph-308941\" class=\"section-permalink\" href=\"https:\/\/vacode.org\/45.2-842\/#B\"><i class=\"fa fa-link\"><\/i><\/a><\/p><\/section>\n\t\t\t\t\t\t<section id=\"C\"><p><span class=\"prefix-number\">C.<\/span> To provide easy access between the return, belt, and intake escapeway entries, substantially constructed man-doors that are properly marked so as to be readily detected shall be installed in at least every fifth crosscut in the stopping line separating such entries. <a id=\"paragraph-308942\" class=\"section-permalink\" href=\"https:\/\/vacode.org\/45.2-842\/#C\"><i class=\"fa fa-link\"><\/i><\/a><\/p><\/section>\n\t\t\t\t\t\t<section id=\"D\"><p><span class=\"prefix-number\">D.<\/span> Doors shall be kept closed except when a miner or piece of equipment is passing through the doorway. Any motor crew or other miner who opens such doors shall see that they are closed before leaving them. <a id=\"paragraph-308943\" class=\"section-permalink\" href=\"https:\/\/vacode.org\/45.2-842\/#D\"><i class=\"fa fa-link\"><\/i><\/a><\/p><\/section>\n\t\t\t\t\t\t<section id=\"E\"><p><span class=\"prefix-number\">E.<\/span> Overcasts, undercasts, and regulators shall be well-constructed; of incombustible <span class=\"dictionary\">material<\/span>, such as masonry, concrete, concrete block, or prefabricated metal; and (i) of sufficient strength to withstand possible falls from the roof, (ii) of ample area to pass the required quantity of air, and (iii) kept clear of obstructions. <a id=\"paragraph-308944\" class=\"section-permalink\" href=\"https:\/\/vacode.org\/45.2-842\/#E\"><i class=\"fa fa-link\"><\/i><\/a><\/p><\/section>","plain_text":"                                 CODE OF VIRGINIA\n\n VENTILATION CONTROLS (\u00a7 45.2-842)\n\nA. Ventilation shall be so arranged by means of air locks, overcasts, or\nundercasts that the passage of a haulage trip or person along the entries will\ncause no interruption of the air current. Each air lock shall be ventilated\nsufficiently to prevent an accumulation of methane therein.\n\nB. Air lock doors that are used in lieu of permanent stoppings or to control\nventilation within an air course shall be (i) made of incombustible material or\ncoated on all accessible surfaces with flame-retardant material having a flame\nspread index of 25 or less as tested under ASTM E162 and (ii) of sufficient\nstrength to serve their intended purpose of maintaining separation and\npermitting travel between or within air courses or entries.\n\nC. To provide easy access between the return, belt, and intake escapeway\nentries, substantially constructed man-doors that are properly marked so as to\nbe readily detected shall be installed in at least every fifth crosscut in the\nstopping line separating such entries.\n\nD. Doors shall be kept closed except when a miner or piece of equipment is\npassing through the doorway. Any motor crew or other miner who opens such doors\nshall see that they are closed before leaving them.\n\nE. Overcasts, undercasts, and regulators shall be well-constructed; of\nincombustible material, such as masonry, concrete, concrete block, or\nprefabricated metal; and (i) of sufficient strength to withstand possible falls\nfrom the roof, (ii) of ample area to pass the required quantity of air, and\n(iii) kept clear of obstructions.\n\nHISTORY: Code 1950, \u00a7 45-60.4; 1954, c. 191; 1966, c. 594, \u00a7 45.1-60; 1993, c.\n442; 1994, c. 28, \u00a7 45.1-161.225; 1996, c. 774; 2005, c. 3; 2021, Sp. Sess. I,\nc. 387.","edition":{"id":1,"name":"2025","slug":"2025","date_created":"2026-06-21 22:39:22","date_modified":"2026-06-21 22:39:22","current":1,"order_by":1,"last_import":null}}