Read the untranslated law here: https://portal.gov.cz/app/zakony/download?idBiblio=69489&nr=361~2F2009~20Sb.&ft=txt
of 7 November. October 2009,
amending Decree No. 10/1994 Coll., laying down technical
the conditions for implementing protection Cap dust and water, and
Decree No. 22/1989 Coll., on safety and health at work and the
traffic safety in mining activities and mining of non-reserved
minerals underground, as amended, and repealed the Decree No.
12/1994 Coll., laying down the requirements for the insulating protective
devices with chemically bound with oxygen, as amended by Decree No. 447/2001
The Czech mining Office lays down pursuant to § 6 paragraph 1. 6 (a). and) Act No. 61/1988
Coll. on mining activities, explosives and the State Mining Administration:
PART THE FIRST
To change the Decree laying down technical conditions for the implementation of
protection cap of the dust and water
Decree of the Czech mining Office No. 10/1994 Coll., laying down the
technical requirements for carrying out protection and dust cap
water, is amended as follows:
1. in paragraph 1 of the present text shall become paragraph 1 and the following
paragraph 2, which reads as follows:
"(2) this Ordinance has been notified in accordance with the directive of the European
Parliament and Council Directive 98/34/EC of 22 December 2004. June 1998 on the procedure for
the provision of information in the field of standards and technical regulations and legislation
for information society services, as amended by Directive 98/48 EC ".
2. section 2 including the title reads as follows:
Interpretation of the terms
For the purposes of this Ordinance shall be deemed to
and protivýbuchovou closure device) passive in mining designed to
prevent the transmission of the explosion of coal dust and methane application extinguishing
substance to the profile of the mining works Shockwave explosion
(b) a series of dams on the dust cap) stationed at set
distances in the profile of the mining works, on which is stored an inert powder,
(c) the series of dams the water CAP) stationed at set distances
in the profile of the mining works on which they are stored or suspended trays
or bags filled with water,
d) Dam passive anti-explosion substructure caps in the cross
profile of the mining works extending from one side of the mine to another
the side on which the extinguishing substance intended to prevent the transmission of the explosion.
Extinguishing substance is stored either in an inert powder, or water in the
korýtkách or bags. Unless otherwise specified, are part of the
the dam at water CAP and trough or water-filled bags placed in the
other portions of the same cross-sectional profile of the mining works in order to better
coverage of the entire profile of the mining works. ".
3. § 3, including the title reads as follows:
Determining the type and design of passive anti-explosion closures
(1) according to the extinguishing substance are passive anti-explosion
dust caps ("dust") or passive
anti-explosion closures, water ("water"). Water closures
they are divided into korýtkové and rolling lobe and depending on how the deployment of dams in
mine workings on the focused and split.
(2) in the technological procedure ^ 1) for the management of mine workings must be
specifically, the transport is handled by the method of protection against explosion of coal
dust with passive protection Cap. Profile of the mining works
must be specified, so that given the projected deployment of equipment
transport and machinery, luten and space for walking was
the provisions of this Ordinance. Similarly, must be processed by way
protection against transmission of explosion of coal dust by using explosion
the CAP for the workings of already issued, if there is a duty to these
caps in the mining work distribute. ".
4. In the title of part two, the word "explosions" is deleted.
5. In the heading of section 4, the word "protivýbuchová" is deleted.
6. In section 4, paragraph 4. 1 the words "protivýbuchová" and "(hereinafter referred to as" dust
bond ") ' shall be deleted.
7. In the heading of part III, the word "explosions" is deleted.
8. section 11 including title and footnote No. 2, 3 and 4 are added:
Trays and bags
(1) the trays and bags for the construction of a water seal must have a net volume
at least 40 l, must be made of plastic must have sufficient strength,
must not promote the spread of fire or cause a explosion from
static electricity; the tray must have a stable shape. These requirements shall
be considered satisfied if the trays and bags meet at least the requirements
designated standards ^ 2) concerning the flammability of plastic, eliminating the risk of
static electricity and methods and the requirements for non-electrical equipment ^ 3) for
potentially explosive atmospheres ^ 4).
(2) Trays and bags in the event of a blast to ensure the release of the water
in the manner and at the time, which creates an effective fire-fighting effect. This condition is
considered fulfilled where the tray are at all the requirements specified by the
^ 2) standards governing protective systems and explosion prevention in
deep mines ^ 4) or if the examination referred to in annex No 5 of this
Decree verified that tray and bags will ensure the expropriation of water defined
When the specified amount of explosive pressure wave.
(3) on the calibration and the bag must be labeled by the manufacturer, its net volume and
height levels corresponding to this capacity. Water level in the calibration and
the bag must be controllable, the trays without removing the lid
(4) a water bond can be built either from korýtek, in which case
It is a water seal korýtkovou or just out of bags, in this case, the
It is a water seal vakovou; It does not apply to the trough and the bag subsequently
According to § 13 para. 5.
2) Section 4a of the Act No. 22/1997 Coll., on technical requirements for products and on the
amendments to certain laws.
3) for example, ČSN ISO 4589-2 Plastics-determination of burning behaviour method
oxygen number-part 2: test at ambient temperature, in terms of
the risk of the emergence and spread of fire, ČSN 33 2030 Electrostatics-directive
for the avoidance of hazards from static electricity and EN 13463-1
Non-electrical equipment for potentially explosive atmospheres-part 1:
Basic method and requirements, with a view to eliminating the risk of explosion
from static electricity.
4) for example, ČSN EN 14591-2 explosion prevention and Protection in the
deep mines-protective systems-part 2: passive water korýtkové
9. sections 12 and 13, including the following titles:
Populate the korýtek and bags of water
(1) the trough and bag water closures must be filled with at least the
volume of water that corresponds to the appropriate character on the calibration or bag.
(2) to limit the evaporation of water from the trough the hatch must be used.
section 13 of the
Density profile of the mining works
(1) the trays and bags of water closures in the cross section of the mining works store
or hung on the dams so as to cover at least 35% of the largest width
light of the cross-section of the mining works on the area of up to 10 m2, 50% of the greatest width
light cross section mine with an area of over 10 square meters to 15 square meters and at least 60% of the
maximum section width of the mining works more than 15 m2; the bags can be
just hung. If the equipment does not allow for the deployment of mine korýtek
flush or hampers the efficient dispersal of water into the mine's profile
the works can be placed in a trough in more planes. For an example deployment
is given in annex 2 to this Decree, figures 2 and 3.
(2) the coverage of free spaces on the sides of the mining works,
It's the korýtek or bags of stored or on media; bags
they may just be hung. Example of density is given in annex 2 to this
the Decree, Figure 3.
(3) the trays or bags of water closures are placed so that they do not touch
reinforcement, rigging, or the side of the mine, nor each other. The total spaces
between in or bags and bags and the sides or in the mining
the work must not be greater than 1.8 m, with no gap between the korýtkem or
bag and the side of the mining works must not be greater than 1.2 m, and between two
in or bags must not be more than 1.5 m. Spacing is measured between
vertical planes parallel to the longitudinal axis of the mining works of many
top edge of the korýtek or bags. Examples of location korýtek and bags
are listed in annex 2 to this Decree, Figure 3, and annex No.
4 to this Decree, Figure 3.
(4) the Dna korýtek placed on the structure and the bottom corners of the suspended
the bag must not be above the počvou higher than 2.6 m or not bag any Trough
the parts interfere with the cross-section for walking and transportation. In profiles, where is over
in bags or free space greater than 1.5 m, other
the dam, for which the requirement does not apply to the first sentence; for the location of the korýtek
and bags for more dam of paragraph 3. Examples of korýtek and location
bags are listed in annex 2 to this Decree, figures 2 and 3, and in the
Annex No 4 to this Decree, Figure 3.
(5) if the distance between the lower branches of the mining belt conveyor and
počvou greater than 0.75 m must be in this area at the site of each
at least one dam, trough or water-filled bag with a capacity of at least
40 l. This trough or bag is not counted among the trays and bags by
paragraph 1 and the water in this calibration or bag is included in the
the total volume of water in the water closure. ".
10. section 14 paragraph 5 is added:
"(5) in a single dam may be a trough placed lengthwise and crosswise.
Lengthwise in the dam may be laid more than 50% of the korýtek; a greater number of
only when it is the test according to the specified standards governing protective
systems and explosion prevention in deep mines ^ 4) or in accordance with
Annex No. 5 to this Ordinance authorized arc-quenching effect of such
11. under section 14 shall be added to § 14a, which including the title reads as follows:
The location of the bags in the dam
(1) Bags in the dam must be hung on the beams of a curtain, and limited slip
it in a way that preserves the accessible filling and do not cause
physical breach of the bag.
(2) the Beams are placed horizontally, perpendicular to the longitudinal axis of the mining works.
(3) Bags are hung only perpendicular to the longitudinal axis of the mining works. ".
12. section 15 including the title reads as follows:
The support structure for the water trays and bags caps
(1) the supporting structure for the trays and bags of water closures, which are
supporting frames, beams and their bases, carriers, holders and their
the anchor must be sufficiently rigid and solid, to suit the purpose. In
broad cross-section of mining works, where would any deflection load-bearing
construction could cause a shift korýtek or emptying water out of them, can
be a deflection of the structure to prevent the wire or attachment
chain to the ceiling section of the mine.
(2) the structure is fixed on the reinforcement of the mining works or on the
Compact rock mantle mining works.
(3) the supporting structure for the loosely laid trough must ensure
a large enough area with a trough to prevent
deformation of dna after its filling the water trough. With a combined store
the tray can be stored lengthwise overlay.
(4) the supporting frame for hanging up korýtek consists of two parallel beams
firmly connected together by vertical bars that ensure their continued
distance. The walls of the korýtek supporting frame must not be covered to a greater height
than 0.06 m.
(5) the support structure must be secured against movement in the direction of the longitudinal
the axis of the mining works. Example ensure the support structure for the bags is listed
in annex 4 to this Decree, Figure 5. ".
13. In article 16(1). 2 the second sentence of the number "25" is replaced by "20".
14. in article 16, paragraph 3 reads:
"(3) the Water bond concentrated consists of the number of dams, in
which are placed the trays or bags filled with water. Adjacent
dams are placed so that the distance between the in and bags
the adjacent dams was 1.2 m to 3 m total length of water closures
concentrated must be at least 20 m. ".
15. in section 17(2). 1 the second sentence with the number "25" is replaced by "20".
16. in section 17(2). 2, the number "25" is replaced by "20".
17. in paragraph 18, the dot at the end of the text is replaced by a semicolon and the following
the words "Similarly when you move individual dams.".
18. sections 19 and 20, including the following titles:
Water-bond split and its length
The water bond single consists of groups of dams with or in bags,
which are distributed continuously in the mine workings in accordance with Annex 2 to this
the Decree, Figure 1. The distance between adjacent dams one
the group must be at least 1.2 m, but a group of dams may be in the mining
the work spread in a length of more than 4 m distance between groups of dams
may be the most 30 m, while the profile of the mining works up to 10 m2 more than 50 m.
The volume of water in the dams group
In the Group of dams must be at least such a volume of water, in litres, how much
makes the volume of mining works in the neighboring group m3 dams. The calculation is
the sections in both directions from a group of dams and by higher
the values shall be determined by the volume of water in the dams group. ".
19. in paragraph 21, the words "korýtkách" are deleted.
20. Appendix 2 is added:
"Annex 2 to the Decree No. 10/1994 Coll.
21. Appendix 4:
"Appendix 4 to the Decree No. 10/1994 Coll.
22. After annex No 4, the following new annex 5, to read:
' Annex No. 5 to the Decree No. 10/1994 Coll.
The basic conditions for efficacy testing of water seal in the experimental gallery
Preliminary provisions for the test water closures
The test may be performed only accredited testing laboratory. The result of the
the test shall be indicated in the test report. Water seals shall be tested
in the experimental gallery in model implementation of closures on the průšleh of the flame.
Trays and bags will meet the requirement for correct function, if the water
Bond compiled from them according to this annex, in the model test
the criterion of efficiency.
Efficacy criterion test caps, the value is the intensity of the explosion
the flame sensor located on the F7 on transfers measuring point 7 (see
Fig. # 1), which must be less than or equal to 10 mV.
Preparation of water closures for exam
The water bond is in the experimental gallery builds up between the measuring points 4 and 5
(see fig. # 1) of the three dams with or in bags so that per 1 m2
cross section of the gallery found it (40 +/-1) l of water. The first dam (in caps
the direction of the explosion) is placed at a distance of (64 +/-2) m from the face trial
stoles. The length of water closures is (6 +/-0.1) m.
Location and arrangement of korýtek and bags of water closures shall be carried out according to the
figures 1 and 2. Trays and bags are hung diagonally on the supporting structure
located in the upper third of the profile of the gallery with the fact that the distance between the
vertical planes many outside of the extreme korýtek or
bags must be at least 40% the greatest width of the slicer experimental light
stoles. In the other, the provisions of part three of this order.
Preparation of equipment for explosive system
In the space between the face experimental galleries and the measuring point 2 are saved on the
method the experimental gallery, 9 SC steel angles (120 × 120 × 12 mm), each of
length of 4 m (see fig. 1). Angles to the invert, fixed so that each of the
they formed the trough and could be freely to them nasypán multiprach.
Angles to the invert arch to be placed parallel to the axis of the Gallery so that the three are
next to each other in front of the face with the fact that one is in the axis of the adit and the remaining two
to the right and to the left at a distance of 1 +/-0.1 m and six is in timeline
Gallery towards the measuring point 2 (see fig. 1). Longitudinal distance
between the angles is (1 +/-0.1) m drift Zone ends at the measuring location
To initiate detonation of explosives using black (this) dust (see chap.
1.4) vývrtový steel mortar and pestle 531 mm outer diameter, length of 1
203 mm with a diameter of 57 mm and depth of the bore hole bore hole 992 mm located
approximately in the middle of the face.
The default amount of multiprachu on each bracket is (10 +/-0.1) kg and
It may vary according to the instructions of the head of the test depending on the
obtained in pressure measuring point 4, so that in this measuring point was
reached above the pressure setpoint (see section 4).
Registration explosion pressures of the flame
Explosion wave is generated by the explosion multiprachu.
The parameters of test explosions are registered with the pressure and
photoelectric sensors T, F in the places indicated in the diagram in Fig. 3.
# 1 the numbers 1 to 7.
Due to the capacity of a measuring system are equipped with space having regard to the
the need for registration. In addition to the starting part of the explosion in the tests
protection CAP is always about pressure and flame indication before
the seals and the flame for the seals.
Registration explosion pressures and the flame shall be carried out on the measuring
points 4 and 7.
The values of the other sensors which can be fitted to the other measuring
places, are informative and only allow you to evaluate the quality
development of explosive transformation in a given space.
For the evaluation of the test result are critical input parameters
the explosion, which the flame and pressure values are recorded in the measuring point 4
(the value of the intensity of the flame to the sensor transfers F4
min. 500 mV, pressure (90 +/-20) kPa), and the value of explosion flames in
measuring point 7 (the intensity values of the flame on
transfers F7 sensor max. 10 mV).
The conduct of tests
Multiprach is rozviřován of steel angles bleskovicí in time (0 to
140) ms (this time interval is given by the use of detonators, the degree of the DeM-S
0-6, by detonating in the three angle brackets in the face are initialized by
detonators, detonating cords in grade 0 other angle brackets from the face
detonators degrees 1 to 6). Agitation of the multiprachu is provided so that
pieces of detonating cords with a length of 4.1-4.2 m adjustují detonators, the
at the bottom of the angle brackets and spread evenly spray multiprachem. As follows rozvířený
dust in the Gallery creates an explosive concentration and is set on fire and brought to
explosion load 500 g Vesuvitu TN from the chalet with a time delay, 750 +/-
50 ms from the early initiation of detonating cord detonator grade 0 (initiation of explosive charges
Vesuvitu TN executes the exploder DeD-with grade 3).
Fig. No 1 lay out the test in the experimental gallery
Evaluation of tests
When the explosion explosive parameters must be reproducible, which
measurement of input pressure explosion waves in point 4, which must be
in the range (90 +/-20) kPa.
Blasts with an input pressure of outside this interval are not counted.
Evaluates the file only 5 tests that meet a condition
the desired explosion parameters.
From file 5 tests that its parameters comply with the výbuchovými
requirements, must in all cases comply with criterion water bond
the relative effectiveness of the test, i.e. closures. the intensity of the explosion flame
the F7 sensor must be transfers less than or equal to 10 mV. The tested
sample korýtek or bags in this case complies with and fulfilled the conditions
of the test.
Define other test conditions
For the explosive system is used by the dried Brown coal dust.
multiprach, the lower explosion limit max. 75 g. m-3 at initiation
energy Ei = 9 kJ and medium grain size max. 0.1 mm.
The value of Ei is given with an accuracy of +/-10%. The quality of each new shipment
multiprachu must be accompanied by accredited test protocol
Requirements for pressure sensors
Sensors used for the capture of pressure must have a valid
calibration of the output signal, in the range of 1 to 10, measuring range 0 to min.
160 kPa, overload capacity min. 150%, min. 0.6% accuracy and must have
temperature compensation (the values are given by the technical specifications of the sensors).
Requirements for photoelectric sensor
For the measurement of flame sensors are used with spectral sensitivity in the
the area of 0.4-1.1 mikrom.
Photoelectric sensors must have a valid calibration.
Requirements for the climatic conditions
Climatic conditions in the section of the Gallery, where the tests will be carried out,
must correspond to the following values: temperature (15 +/-5) ° c, humidity
(95 +/-5%). The temperature and humidity must be measured in the face trial galleries
and in the measuring point 7, before starting the tests.
Fig. # 2 Arrangement of bags of water closures
Fig. No. 3 experimental Scheme Gallery
1. Anti-explosion locks built in accordance with the requirements of the existing
legislation before the entry into force of this order in the mining
related immediately with dobývanými or likvidovanými faces and in
mining, whose lifetime will be shorter 12 months,
be deemed to meet the requirements of anti-explosion closures of this order.
2. other explosions locks built prior to entry into force of this
the decree must be brought into line with this Decree to the twelve
months from the effective date of its effectiveness.
Amendment of the Decree on health and safety at work and safety
When operating in mining activities and mining of non-reserved minerals in
Decree No. 22/1989 Coll., on safety and health at work and the
traffic safety in mining activities and mining of non-reserved
minerals underground, as amended by Decree No. 477/1991 Coll., Decree No.
340/1992 Coll., Decree No. 3/1994 Coll., Decree No. 54/1996 Coll., Decree
No. 111/1998 Coll., Decree No. 434/2000 Coll., Act No. 326/2002 Coll.,
Decree No 141/2004 Coll., Act No. 300/2005 Coll. and Decree No.
282/2007 Coll., is amended as follows:
1. In paragraph 164 of paragraph 1. 1 the words "must be placed" is replaced by "
builds if possible "and the number" 30 "is replaced by" 20 ".
2. In paragraph 164 of paragraph 1. 5 after the word "korýtek", the words "or bags".
3. In article 164, paragraph 6 is added:
"(6) if it is between two groups of korýtek or bags anti-explosion
caps cut cross, turning, fork or curve, in which the amended
the direction by more than 90 degrees, can be justified, the distance
between these groups korýtek or bags larger than 30 metres. The number of
korýtek or bags must, however, be increased enough to comply with the
the condition of at least 1 litre of water per cubic meter of volume of excavation
among the groups korýtek or bags. ".
4. In paragraph 164 of paragraph 1. 8 the first sentence after the word "korýtek" shall be replaced
5. In section 165 paragraph. 2 the first sentence after the word "korýtek" shall be replaced
6. In section 165 paragraph 3 reads:
"(3) Protivýbuchová bond single tables, must be marked on the
which is the number of the closures, the cross-section of the mine in metres
square, the number of korýtek or bags, or the amount of water in one
Group korýtek or bags, the date of the last periodic inspection and the signature of the
the oily. The tables are placed on both ends of the closures. In the case of
that single bond transitions into another excavation, must be marked
the new tables. The same is true when changing the cross-section of the mining works, according to the
which is changing the amount of water in the Group korýtek or bags. ".
The cancellation of the Decree laying down the requirements for the insulating protective
Decree No. 12/1994 Coll., laying down the requirements on insulation
protective devices with chemically bound with oxygen, is hereby repealed.
The EFFECTIVENESS of the
This Decree shall enter into force on the thirtieth day after the date of its publication.
Ing. Pěgřímek in r.
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