Decree No. 4 / 1994 Coll.
Order of the Czech Mining Office laying down requirements for the design and construction of buildings and equipment for the distribution and insulation of winds and the closure of mining works
Valid
Effective from 18.01.1994
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4
DECLARATION
Czech Mining Office
of 6 December 1993
laying down requirements for the design and construction of buildings and installations for the distribution and insulation of winds and the closure of mining works
According to § 6 paragraph 6 (a) of the Act of the Czech National Council No. 61 / 1988 Coll., on Mining Activities, Explosives and State Mining Administration, as amended by the Act of the Czech National Council No. 425 / 1991 Coll., Act of the Czech National Council No. 542 / 1991 Coll. and Act No. 169 / 1993 Coll.:
GENERAL PROVISIONS
Subject matter
(1) This decree applies to the design, production and establishment of wind and dam objects on coal mines. Specifies technical and safety requirements for wind and dam objects and for the equipment of dam objects.
(2) The decree does not apply to the closure of main mining works (1) and the closure of old mining works. (1a)
(3) This decree was notified in accordance with Directive 98 / 34 / EC of the European Parliament and of the Council of 22 June 1998 laying down a procedure for the provision of information in the field of technical standards and regulations and of rules on information society services, as amended by Directive 98 / 48 / EC.
Interpretation of terms
For the purposes of this decree, it shall be considered as:
(a) wind object non-exploding mine building object and equipment designed to direct wind current in the mine. It's wind locks, wind insulation doors and wind control doors and regulating devices,
(b) a wind-lock of a building intended for the non-explosive and tight closure of abandoned mining works and dismantled spaces;
(c) wind doors for the control or isolation of wind currents in mining works with regular walking or transport;
d) barrier object explosive-resistant mining building designed to guide wind current in the mine. It's a rake door, a rake door with a passage for the conveyor, closing and insulating dams,
(e) equipment for the moor object product and equipment intended to be installed or suspended on the moor object in order to permit the passage of means of transport, passage or passage of humans, the collection of mining water, sampling of mining air, wind flow and the like. It's a dam door, passages, barrage lute, conveyor passages, barbed windscreens and special purpose pipes,
(f) barrier doors for the control or isolation of wind currents in mining works with regular walking or transport;
(g) the regulatory object of the equipment used to regulate the volume flow of mine winds in the wind network;
(h) the closure barrier of a building designed for the close and explosive resistant closure of abandoned mining works and dismantled spaces;
(i) an insulating barrier of an explosive-resistant building object intended for the explosive-resistant insulation of mining works, equipped with a passage, a flanged barrier, a passage for a conveyor or a barbed windpipe;
(j) barrier lute explosive resistant lute of circular cross-section intended for the passage of dams;
(k) the passage through the insulating object of the device integrated into the explosive barrier for the passage and transport of the equipment and material;
(l) passage for the conveyor by an insulating object of the device which allows the explosive insulation of the mine with the coal belt transport;
(m) a barrier windshield pipe equipped with an anti-explosion safety valve;
(n) a pipeline for the transport of inert gases or other materials into a closed space,
o) cable piping piping designed for the passage of power, communication and control cables by the object,
(p) dyeing an opaque wind lock for close closure of the mine or regulation of wind current used either separately or as part of another object,
r) wind barrier longitudinal bulkhead used for secondary ventilation of mining works,
(s) wind suspension of equipment intended to control the volume flow of winds to which leakage requirements are not imposed;
(t) rib type reinforcement forming a regular strip filled with base mass,
(u) a wind bulkhead, an opaque wind closure for wind current control or for closure of a mine for which no leakage requirements are imposed.
_
Wind closure
(1) The wind lock is divided into two parts according to the design and type of material used.
(a) brick or block walls,
(b) floating,
(c) of fast-acting and special materials,
(d) ball,
(e) combined,
(f) feathers.
(2) The wind lock must be built in places designated by the special regulation. (1b) The following conditions shall be complied with:
(a) the mining work at the site of the construction of wind caps shall be secured against the fall of rock at least 5 m from the closure on either side;
(b) under conditions where rock pressures are manifested or may be expected, the wind lock shall be so constructed as to withstand rock pressure manifestations without material breach of its tightness;
(c) the distance from the wind lock to the cross, fork or turnoff shall be such as to enable the accessible side to build a closing barrier;
(d) all unnecessary pipelines, transport equipment, cables and loose rock or coal must be removed at the site of the wind lock construction.
(3) In the construction process, other than those which close the failure corridors during chamber mining, the air sampling piping and, if necessary, other purpose pipes or equipment shall be installed and anchored.
(4) The pre-closure spaces shall be maintained in such a way that they are safely accessible for inspection.
Wind lock walled
(1) For the construction of masonry caps may be used
(a) full bricks of a minimum strength of 20 MPa;
(b) blocks of concrete or sintered concrete with a minimum strength of 20 MPa;
(c) other materials, if they have been identified as suitable for underground use, 2)
(d) cement or calcium cement mortars with a minimum strength of 10 MPa.
(2) The wall closure shall always be anchored throughout the perimeter of the mine to an intact rock or coal pillar.
(3) The thickness of the walls shall not be less than 15 cm up to 7 m2 of the fair section of the mine, not less than 7 m2.
(4) The following conditions shall be complied with when the seal is fixed:
(a) the contact of the masonry with the outline of the seal or fitting shall be completed without gaps; In particular, the upper part of the cap should be seen and, where this is not possible, any gaps and cavities should be filled with cement or other injection,
(b) each wall closure shall be plastered with cement or calcium cement mortar on the accessible side.
Floating wind lock
(1) For the construction of float caps is used
(a) a mixture of ash and water;
(b) a mixture of ash, water and cement; mass ratio of ash and cement 4: 1 to 1: 1,
(c) other materials, if they have been identified as suitable for use in the subcountries;
(2) The floating seal is established by flooding the space of the mine work defined by a pair of filter feathers by floating mixtures, in tilting mine parts, where the inclination of the mine work allows, into one filter feather, with the thickness of the seal being measured below the ceiling of the mine work.
(3) The following conditions shall be complied with when establishing a floated cap:
(a) the filter feathers must be built in a shallow section formed throughout the perimeter of the mine after removal of the reinforcement at the point of the cutting; the rest of the reinforcement between the pair of feathers can be kept,
(b) the filling and control pipes must be fitted to the highest point of the opening point in the enclosure (the control lines of the mouth above the filling line);
(c) the seal shall be flooded at interrupted intervals. The closure of the floated closure consists of multiple flooding of the closure, as concentrated as possible.
To speed up flooding the seal, the space between the feathers can be filled with stone.
Wind closure from fast-moving and special materials
(1) For the construction of fastening and special materials caps can be used
(a) normally or slowly solidifying gypsum with the beginning of the freezing period of 6 to 20 minutes during hydromechanical transport of gypsum grief;
(b) rapidly, normally or slowly solidifying plaster with the beginning of the freezing period of 2 to 20 minutes during pneumatic transport of plaster;
(c) anhydrite,
(d) other special materials, if they have been designed to be suitable for use in subearth.2)
(2) This seal shall be composed of plaster transported into the space between a pair of back-up feathers using a plaster aggregate.
(3) The following conditions shall be complied with for the construction of plaster caps:
(a) the gypsum seal must always be anchored throughout the perimeter of the mine to an intact rock or coal pillar;
(b) the mouthpiece of the filling pipe and control pipe must be sealed to the highest point;
(c) the gypsum shall be carried out without interruption and at all times comply with the water coefficient (water / plaster ratio) in the range of 0,6 to 0,8.
Boundary wind lock
(1) The ball wind lock is built from horizontally stacked blocks, logs, sleepers and the like. The gaps between the round are filled with long chips or wedges.
(2) The ball cap must always be anchored throughout the perimeter of the mine work to an intact rock or coal pillar.
(3) The thickness of the ball cap must be at least 1 m.
(4) Mints of various qualities, from clay to cement, are used as a sealing binder, with ash, bentonite, etc.
(5) The ball seal is sealed with plaster or sealing spray.
Windscreen combined
The wind lock combined is used to improve the tightness of the wind caps, such as coated gypsum or coated spiny cement.
Feathers
(1) The feathers are divided into:
(a) tight, for close closure of the mine,
(b) regulatory, for the regulation of wind current;
(c) filtration, for use in the construction of floating wind caps or dams,
(d) support, used in the construction of wind caps or dykes made of fast-acting materials.
(2) For the construction of feathers is used
(a) firmly supported stands or structures made of mine wood for the feasting skeleton;
(b) board sawn wood, landscapes or mullets for the own construction of feathers,
(c) for the sealing of latex, asphaltolatex emulsion, polyurethane foam, plaster, plastic paste made of clay, bentonite and the like, cement mortar, ventilation cloth and other materials intended for use in podear2),
(d) as a filling material for duplicated feathered clay, covered and water-coated ash, limestone powder or other compacted material intended to be used in sub-earths (2);
(e) jute for filter feathers.
(3) The roasting must always be anchored throughout the perimeter of the mine to an intact rock or coal pillar.
Rib
(1) Rib is established from non-flammable rock or materials intended for use in mines.
(2) If the material used does not guarantee sufficient leakage against the stretch of the mine winds through the cut-out space, the rib shall be sealed. The materials referred to in § 9 (2) (c) and (d) may be used for sealing.
Wind bulkhead
Only materials intended or approved for use in the mine, such as ventilation cloth, insulating material, sand sacks or ash, may be used to build a wind bulkhead.
Wind doors
(1) According to the design, the wind doors are divided into
(a) single-wing,
(b) two-winged.
(2) According to the material of the door wing, the wind door is divided into
(a) wood,
(b) metal,
(c) combined.
(3) According to function and tightness, wind doors are divided into
(a) insulating,
(b) regulatory.
(4) The construction of a wind door consists of
(a) door wings;
(b) a door frame (frame), mounted in a cross-section.
(5) The following conditions shall be complied with in the manufacture of doors:
(a) the dimensions of the wind doors shall be chosen in such a way that the dimensions of the light cross-section of the passage meet the requirements of the special Regulation, 3)
(b) the door shall have a handle;
(c) wings intended for mining works with locomotive transport shall be provided with reflecting glass or foil on both sides;
(d) the structure of the door shall be such that the door wing is automatically closed;
(e) the full door shall be situated on the door frame.
(6) In the case of insulating wind doors, the door frame shall be a metal frame and a cross-section of a brick wall of at least 30 cm thick. For wind doors, there may be a cross and a door frame made of wood.
(7) The provisions of Section 4 apply to the construction of the masonry. The frame of the door shall be locked or fitted in such a way that the wing closes automatically and does not open with wind depression. The door wing shall be suspended after the period necessary to obtain the strength of the masonry.
Control object and equipment
(1) The control object and equipment are:
(a) regulating wind doors;
(b) wind curtain, 4)
(c) feathers with control holes of different sizes,
(d) wind dam.
(2) Paragraph 12 applies to the construction of a regulatory wind door. The size of the hole is adjusted depending on the size of the depression and the required volume flow of the winds in the individual parts.
(3) Only materials approved for use in mines may be used to build wind curtains (2).
(4) Paragraph 9 applies to the construction of feathers with a control hole. The size of the hole is adjusted depending on the size of depression and the required volume flow of winds in individual mine parts.
(5) The wind dam (5) is set up in the longitudinal centre of the mine work for the separation of draught and exhaust wind current and is subject to the provisions of § 9.
PLAYING OBJECTS
Explosivity of the dam object
(1) The explosive resistant object is dimensioned to Pv explosion pressure = 0,5 MPa. The following safety coefficient values shall be selected:
(a) k = 1 for a dam door object intended to isolate wind currents within the wind area and for a closure barrier intended to close abandoned mining works and old age without the risk of self-igniting coal;
(b) k = 2 for the barrier door object intended for the isolation of individual wind areas, for the closure barrier intended for the closure of mining works and old age with the risk of self-igniting coal and for the barrier object designated by the district mining authority when authorising mining activities.
(2) The smallest thickness of the dam L in metres is determined by the relationship
L = 0,9 .bmax. ANNEX II
where k and Pv - shall be determined in accordance with paragraph 1;
δtl - the smallest strength at the pressure of the building material used in MPa,
bmax - the largest of the dimensions of the rough section of the mine work (height or width) in metres.
Closure dam
(1) The closure barrier is divided into:
(a) brick or block walls,
(b) floating ash or ash cement,
(c) of fast-acting or other special substances,
(d) concrete,
(e) combined.
(2) Special Regulation (6) applies to the location of the dam. The following conditions must be complied with:
(a) the mine work at the site of the dam must be secured against the fall of the rock at a distance of at least 5 m on either side of the dam;
(b) the distance of the dam from the cross, fork or turnoff of the mine work must be such as to enable the accessible side to build another closure barrier in the event of disruption of the original dam;
(c) all unnecessary pipelines, transport equipment, cables and loose rock or coal must be removed at the site of the dam before the construction begins.
(3) During the construction, the airframe shall be installed and anchored in the dam and, if necessary, other special purpose pipes, such as drainage, intervention, filling, control, injection, passage according to Part Four.
(4) The premises in front of the dam shall be maintained in such a way that safe access to the dam is available for inspection purposes.
Walled closing dam
(1) For the construction of the walled dam must be used
(a) full bricks of a minimum strength of 20 MPa;
(b) blocks of concrete or sintered concrete with a minimum strength of 20 MPa;
(c) bricks or blocks of other materials, if they have been tested for resistance to the blast barrier, 2)
(d) mortar cement or calcium cement with a minimum strength of 10 MPa.
(2) The masonry dam must always be anchored in a wedge throughout the perimeter of the mine. The wedge or rectangular gap is established on an intact rock or coal pillar. The depth of the cut shall be determined taking into account the strength of the rock at the drop point, but not less than 50 cm. In mining with concrete reinforcement or solid rock, the dam can be anchored by means of clamps embedded in depth of at least 0,7 m to the number, ceiling and sides of the mine work so that at least 1 clamp is placed on 1 m2 of the contact surface of the dam with reinforcement. Clamps shall be at least 22 mm in diameter and at least 1 m in length An example of the construction of the walled dam is given in the annex to this decree in Figure 1 and No 2.
(3) The thickness of the wall dam is determined in accordance with Paragraph 14 (2). The strength of the mortar is considered after 28 days of rigor.
(4) The masonry dam must follow the foundations in the beginning of the mine work or solid rock. The entire outline of the cut must be rinsed with water and covered with cement milk.
(5) The following conditions shall be complied with when the dam is walled:
(a) the contact of the masonry with the outline of the passage or equipment of the dam must be completed without gaps; the top of the cap must be carefully observed and any gaps and cavities must be filled with cement or other injections where this is not possible;
(b) each wall dam shall be plastered with cement or lime cement mortar on the accessible side.
Floating barrier
(1) For the construction of a floating dam, it must be used:
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Regulation Information
| Citation | Order of the Czech Mining Office No. 4 / 1994 Coll., laying down requirements for the design and construction of buildings and equipment for the distribution and insulation of winds and the closure of mining works |
|---|---|
| Regulation Type | - |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 18.01.1994 |
|---|---|
| Effective from | 18.01.1994 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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