Decree No. 165 / 2002 Coll.
Decree of the Czech Mining Authority on separate ventilation in mining activities in flowing mines
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Effective from 01.06.2002
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165
DECLARATION
Czech Mining Office
of 11 April 2002
on separate ventilation during mining activity in fluent mines
According to § 6 (6) (a) of Act No. 61 / 1988 Coll., on Mining Activities, Explosives and State Mining Administration, the Czech Mining Authority provides:
Scope
The decree sets out requirements for separate ventilation equipment, its design, operation and inspection in mining activities in smooth mines. 1) 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.
Basic concepts
For the purposes of this decree, it shall be considered as:
a) lutnu - piping for the distribution of mining winds usually made of sheet metal or plastic materials,
b) lutna flexible, non-reinforced, flexible lutna made of soft plastic without internal reinforcement, maintaining its circular shape,
(c) lute stroke - a set of interconnected luten fitted with a luten fan or other pressure source ("fan"),
d) main lute thrust - a lute pull of separate ventilation resulting in a passing wind current equipped with one or more fans;
(e) local speed of mine winds - speed of flowing mine winds determined by measurement at one point of the mine work;
f) Additional ventilation equipment - separate ventilation equipment to increase local speed of mine winds (pipe, free fan, etc.),
(g) transverse wind current - mine winds flowing through the burnished mine as a result of vacuum or overpressure caused by the main fan;
(h) speed of mine winds - average speed of flowing mine winds determined by measurement in the section of the mine work;
(i) separate ventilation - ventilation of an intact mine by a lute stroke, or by a lute stroke with one or more fans which may be suction, blowing, combined suction or combined blowing;
j) separate ventilation by blowing - separate ventilation by which the mine winds are blown from the passing wind current to the front,
k) separate suction ventilation - separate ventilation, in which the mine winds are sucked from the face space into the passing wind current,
(l) the section overlapping the lute moves - the section overlapping the main lute thrust with the next lute stroke;
(m) the mouth of the lute thrust - the end of the lute thrust at the forehead, which is the front surface of the embossed, temporarily stopped or undamaged mine,
n) secondary lute thrust - lute thrust of separate ventilation with one or more fans, or with another source of pressure, which is not resulting in a transverse wind current and is used for ventilation of the section of an intact mine adjacent to the forehead following the main lute thrust;
o) vortex - devices installed in a lute thrust interrupting the free wind current output from the mouth of the lute thrust and changing the direction of flow to the lateral (tangential) output through the whirlwind luten,
(p) whirlwind lute - special lute design allowing lateral (tangential) wind current output from the lute,
q) free fan - fan located outside the main and secondary lute thrust with the function of auxiliary device of separate ventilation,
r) free wind current - wind current blowing in the direction of the lute thrust axis;
s) Luten storage tank - separate ventilation device allowing continuous extension of luten tension by non-reinforced lutnages;
t) lute thrust feeding - the transition of the lute thrust from the mine work ventilated by the passing wind current to the mine work separately ventilated,
(u) separate ventilation equipment - a set of equipment used for separate ventilation, such as fans, wind guidance, distribution and control devices, noise absorbers, luten storage tanks, as well as a scrubbing device and, where appropriate, a mine wind cooler;
(v) cooling equipment - equipment designed to reduce the temperature of the mine winds;
x) mine wind cooler - part of the cooling system ensuring heat removal of mine wind;
(y) the side - the lute thrust branch, connected in parallel to the main lute thrust in which the mine wind cooler is located.
General requirements
(1) Separate ventilation may only be operated as continuous, except for interruption for the period strictly necessary to verify the occurrence of fluent 1) and for the maintenance of lute thrust, fans or their power grids.
(2) The separate ventilation equipment may only be made of materials that do not support the spread of fire and meet the requirements of protection against static electricity. These conditions are met if the equipment complies with the requirements of Czech technical norem.2)
(3) Only luten, luten storage tanks, noise absorbers, dust dispensers and mine wind chillers with known values of their aerodynamic resistance, and lute fans with known working characteristics are allowed to be used in separate ventilation.
(4) Only lutons and luten storage tanks whose pressure value by which these devices can be stressed can be used are known. This value shall not be exceeded when operating separate ventilation.
(5) The separate ventilation of the mining works in which they are fired or conquered may only be operated in the arrangement set out in Annex 2.
Lute stroke
(1) The luten connection in the luten draw must be made in such a way as to ensure the necessary tightness and reliability against the spontaneous disconnection.
(2) Lute thrust from flexible non-reinforced luten must be ensured in such a way as to prevent damage to the luten during the start of the fan and to allow the luten thrust to be extended while the fan is running.
(3) The roll-off shall not be made from flexible non-reinforced luten.
(4) The non-reinforced flexible lute shall not be used in that part of the lute thrust where the fan creates vacuum.
(5) Diversion from the lute thrust is possible only between the mouth of the lute thrust and the nearest fan or chiller of the mine winds in the arrangement according to § 9 (1) (c) and (d) in lute tah.3)
(6) The mouth of the lute thrust when using the shredding work must be protected against the entry of rock into the lute.
Fans
(1) The fan of separate ventilation shall not permit the possibility of igniting methane or coal dust or substances forming an explosive mixture by design. In the case of an electrical and air-electric fan, only an electric motor in a non-explosive design can be used, in the intake lute thrust only a fan of such a structure which prevents contact of the electric motor with the transported air. In the case of a fan whose design excludes contact of the electric motor with the transported air, it is possible to transport a methane mixture with a concentration of more than 1,5% with this fan for the necessary time, in particular when the permitted methane concentration is abruptly exceeded; This does not apply to the planned ventilation of the gas-fuelled mine.
(2) Only such an energy supply for a fan can be considered satisfactory to ensure its continuous operation.
(3) Only an air-electric fan may be used which automatically switches from the electric to the air drive when the electricity supply is interrupted or when the methane concentration in the mine air is increased outside the fan; The technical solution shall be such that there is no automatic switching from the electric air.
(4) An air-conditioning fan and an electric fan may only be operated provided that the ignition of methane, coal dust or air-forming substances is prevented by propulsion other than electricity, even if the fan is not connected to the electrical circuit.
(5) If lute is not connected to the fan, it shall be provided with protective devices .4)
(6) The silencer should be used for a fan if the level of noise caused by the fan running at the places where workers are permanently stalling would otherwise exceed the value laid down by the specific legislation. 5)
(7) When ventilation is blown, the first fan shall be placed at a distance of at least 5 m from the exhaust wind current from the workplace, with suction ventilation at a distance of at least 5 m from the result of a separately ventilated mine work into the mine work with a passing wind current and 3 m from the end of the lute thrust. The control and switching devices of the first fan may be located at least 5 m away from the result of a separately ventilated mine work into a mine work with a passing current against the direction of the flow of the mine winds.
(8) The electric fan of separate ventilation can only be located in a mine with a passing wind current. In a non-penetrated mine work, the electric fan may only be part of a mine wind cooler or a scrubbing device located outside the lute thrust, in the next lute pull of the combined separation ventilation or in the main lute thrust side, at a distance of at least 20 m from the forehead.
(9) The air-conditioning fan located in a separately ventilated mine piece cannot be less than 50 m from the front, less than 20 m from the front when the air-conditioning fan is in a separate ventilation chamber. The air-electric fan cannot be placed between the mine wind cooler and the mouth of the lute thrust in the lute thrust. In a separately ventilated mine work with a risk of rock, coal and gas bursts, the air-electric fan can be operated only on air energy at a distance of less than 200 m from the front.
(10) The fan or other source of pressure of the next lute draw is located only in the section overlay of lute draws.
(11) A separately ventilated mine can only be ventilated by a luten stroke with a fan or fans located in a passing wind current up to 400 m.
(12) The fan in the main lute thrust, outside the sidewall, is located at least 3 m away from another fan, mine wind cooler or scrubbing device, which are sorted in succession with this fan.
Separate ventilation by blowing
The separate ventilation of the blowing can be used in the arrangement as shown in the figure And Annex No 2, under the conditions that free wind current from the main lute thrust is parallel to the axis of the mine work and that it is not permanently disturbed between the mouth of the lute thrust and the forehead (e.g. by a technological device). In this arrangement, a luten storage tank may be used provided that no separate ventilation is interrupted during its replacement.
Separate suction ventilation
The separate suction ventilation may be used in the arrangement as shown in Annex 2, Figure B.
Separate ventilation combined
(1) The separate ventilation of the combined suction with the main lute thrust of the suction and the subsequent lute thrust of the blowers may be used in the arrangement as shown in Figure C of Annex 2 and provided that:
(a) the volume flow rate of the winds in the main lute draw is at least 20% greater than the volume flow rate of the winds in the next lute draw;
b) the free wind current from the next lute thrust is parallel to the axis of the mine work;
(c) free wind current is not permanently disturbed between the mouth of the next lute stroke and the forehead;
(d) the mouth of the main lute thrust shall be drawn by the stamping machine closer to the front of the head than the operator's station.
(2) The separate ventilation of the combined blowing with the main lute thrust of the blowing and the subsequent lute stroke of the suction may be used in the arrangement according to Figures D, D2 or D3 of Annex No 2 and under conditions that:
(a) the secondary lute stroke shall be equipped with a mobile scrubbing device;
b) the volume flow rate of the winds in the main lute draw is at least 20% greater than the volume flow rate of the winds in the next lute draw;
(c) the end part of the main lute thrust shall be provided with a device enabling the free wind to be interrupted (closing valve), swirling lute and a luten container. The closing valve may be replaced by a vortex placed in front of the swirling lute in the direction of wind flow in the lute thrust,
d) the operation of the cutting organ of the driving machine is possible only when the secondary lute thrust is operated with the dust separator and the current function of the whirlwind luten in the main lute thrust with the interruption of its free wind current;
(e) when the dust separator is stopped or failed, the operation of the cutting organ of the tractor is stopped, the operation of the whirlwind luten is interrupted and the free wind from the main luten thrust is restored;
(f) during the period of replacement of the luten container as shown in Figure E of Annex 2, the technological work on the forehead shall be stopped.
(3) When changing the direction of the mine work embossing by more than 60 °, combined ventilation by blowing according to paragraph 2 may be used in the arrangement according to Figure F or Figure F2 of Annex No 2 and under the conditions that:
(a) the next lute stroke shall not be ventilated for a length greater than 200 m;
(b) the secondary lute thrust shall be equipped with a mobile scrubbing device;
(c) the volume flow rate of the winds in the main lute draw is at least 20% greater than the volume flow rate of the winds in the next lute draw;
d) the speed of the mine winds along the next lute thrust is equal to or greater than the speed referred to in Paragraph 10 (1);
e) the free wind current from the main lute thrust of the blow blower shall be permanently interrupted and the wind current shall be produced by the whirlwind lute,
(f) the operation of the cutting organ of the tractor shall be stopped when the dust separator is stopped or failed.
(4) The separate ventilation of combined blowing with the main lute thrust of the blowing and the subsequent lute stroke of the blowing may only be used in the arrangement set out in Annex 2 (Figure G) and provided that:
(a) a mine wind cooler is located in the next lute stroke;
(b) the volume flow rate by side pull is at least 40% smaller than the volume flow rate of the winds in the main lute draw;
(c) throughout the period of the stamping, the concentration of methane in the mining atmosphere of the embossed mine shall not exceed 0,5%.
For the period and in cases specified by the separate ventilation project, the operation of the secondary lute thrust may be stopped.
Location of mine wind cooler
(1) The mine-wind cooler as part of the separate ventilation device of an intact mine work can only be placed
(a) in a mine with a passing wind current at the beginning of the main blow lute thrust,
(b) in a non-penetrated mine in the next blow-off lute thrust in the combined ventilation mode;
(c) in a non-penetrated mine piece in the side of the main blow lute thrust in accordance with Annex 2 (Figure H) at a distance of not more than 250 m from the mouth of the lute thrust; instead of installing a sidewall, the project sets out the separate ventilation so that the direction of the mine winds flowing through the parallel branches of the main lute thrust is consistent,
(d) in a non-penetrated mine piece in the main blow lute thrust at a distance of not more than 200 m from the mouth of the lute thrust, if the concentration of methane during the stamping does not exceed 1,0%.
(2) The direction of the flow of mine winds in the main lute thrust in the part parallel to the sidewall, when the mine wind cooler is placed in accordance with paragraph 1 (c), shall be checked remotely by a continuous wind speed monitoring sensor located in accordance with Annex 2 (Figure H) and its change shall be indicated at the central control station. The separate ventilation project also contains measures and procedures for changing the direction of mine winds in the main lute thrust.
(3) The organisation shall ensure remote control of the operation of the refrigeration equipment and signal its interruption at the central control station. The separate ventilation project shall also include measures and procedures in case of interruption of the cooling equipment.
Speed of mine winds
(1) Separate ventilation must be designed and operated in such a way that the speed of the mine winds in the separately ventilated mine work, with the exception of the section overlapping the luten moves, reaches
(a) at least 0,3 m.s-1 in the case of a workplace where additional underground spaces are formed in the opener and preparation;
(b) at least 0,5 m.s-1 if the concentration of methane in the mining air is more than 0,5%;
(c) at least 0,15 m.s-1 in deep vertical mining works.
(2) In the section of the separately ventilated mine work, where the speed of the mine winds does not reach the speed specified in paragraph 1 and where the methane concentration is also found to be greater than 0,8%, the additional ventilation device shall be used so that the local speed of the mine winds measured 0,3 m below the highest point of the mine reinforcement is equal to or greater than the speed referred to in paragraph 1 (b).
(3) The swirling lute shall be positioned in such a way that the local speed of the mine winds measured in the direction of the tangential flow of the mine winds 0,3 m below the highest point of reinforcement of the mine work shall be at least 1,5 times the speed of the mine winds referred to in paragraph 1.
Continuous control of methane concentration
(1) Continuous control of the methane concentration by the sensor shall be performed in a separately ventilated mine panel with an electrical device where it is driven or conquered. The sensor shall be placed at a height of 0,1 m below the highest strength point, at the highest methane concentration observed, at a distance of:
(a) within 3,0 m from the front of the head during the separate ventilation of the suction and the combined separate ventilation referred to in Article 8 (2), where it cannot be placed at a distance of less than 0,5 m before the mouth of the intake lute thrust;
(b) within 10 m from the front of the head when the blow is split apart and when the ventilation is combined separately in accordance with § 8 (2) and (4), except for direct influence by free wind current coming out of the mouth of the lute thrust.
(2) The sensors referred to in paragraph 1 may be moved to a safe distance from the tearing site for the duration of the tearing operation.
(3) In the case of separate ventilation combined with blowing according to § 8 (2), continuous control of methane concentration shall be carried out:
(a) in free wind current from the next lute thrust, the sensor being placed at a distance of 5 to 10 m from the lute thrust;
(b) at the point of overlapping the lute strokes in the area of the removal device at a height of 0,1 m below the highest point of reinforcement of the mine.
(4) When the cooling device or electric fan is placed in an embossed mine, at a distance of more than 50 m from the front, continuous control of the methane concentration shall be carried out at the site of the installation. The sensor shall be placed at a distance of 5 to 10 m from this device against the direction of the flow of mine winds, at a height of 0,1 m below the highest point of reinforcement of the mine work.
(5) The organisation shall ensure that the excess of the permitted methane concentration is signalled at the central control post, delineating the area at risk of illicit air composition and determining how the workers at risk are aware of the excess methane concentration.
Continuous control of carbon monoxide concentration
(1) Continuous monitoring of the concentration of carbon monoxide by the carbon monoxide sensor shall be carried out in the wind current derived from the separately ventilated mine work, where it is driven or conquered.
(2) The sensor shall be located:
(a) in the profile of a separately ventilated mine work longer than 50 m at a distance of 5 to 10 m prior to its result in the wind-through current during blowing and combined blow-apart ventilation;
(b) in the free wind current exiting from the lute to the pass-through wind current at a distance of 5 to 10 m from the end of the lute thrust at suction and combined suction separate ventilation.
(3) The organisation shall ensure that exceeding the permitted concentration of carbon monoxide is indicated at the central control station. At the same time, it shall define the area at risk of illegal air composition and determine the way in which the workers at risk are aware of exceeding the permitted concentration of carbon monoxide.
Control of fan operation
(1) The organisation shall ensure that the operation of fans of separate ventilation of miners, miners and temporarily unmanned miners, heads of arrows and boxes is remotely controlled and their operation is indicated at the central control station. Control of the operation of fans of one separately ventilated mine work can be performed as a sum.
(2) When the separate ventilation is interrupted, the organisation shall ensure the immediate shut down of electrical equipment and machinery located in an undamaged mine, from a predetermined location.
Time limits and content of checks
(1) The condition of the separate ventilation equipment of the miners shall be checked at least once in every half of the month, at least once a week when the miner is placed in accordance with § 9 (1) (d). During this check it is also necessary to measure the volume flow of mining winds
(a) brought to the forehead;
(b) taken from the front or supplied on the front by a side lute stroke;
(c) taken by separate ventilation from the passing wind current,
(d) in a mine work with a passing wind current.
(2) When an additional ventilation device is set up, compliance with the local wind speed shall be verified by measuring (§ 10 (2)).
(3) The person who carried out the check shall enter and sign the record of the result of the check. The record will be kept for at least 1 year.
Requirements for design of separate ventilation
(1) The organisation shall ensure that a separate ventilation project as set out in Annex 1 is developed for mining works of more than 50 m in design length.
(2) The separate ventilation equipment shall be designed in such a way that, taking into account all the separate ventilation equipment used and the usual leakage of the lute thrust at the maximum planned length of the unbroken mine work, it ensures that the required speed of the mine winds, the composition of the air and the appropriate microclimatic conditions are respected throughout its length. 5)
(3) If the project referred to in paragraph 1 is not part of the technological advancement (7) or the length of the stamping proposed is less than 50 m, the basic data and requirements for separate ventilation of the mine shall be provided in the technological process, in particular:
(a) the method of separate ventilation,
(b) the arrangement of the separate ventilation equipment in the main and secondary lute thrust with the determination of the overlap zone;
(c) type, number and location of fans and silencers;
(d) the necessary volume flow of mine winds for ventilation of the mine work;
(e) the opening of the lute thrust into the passing wind current, the distance of the lute thrust from the front,
(f) the method of disposal of dust collected arising from the technological process;
(g) method of suspension, coupling and sealing of luten and fans, extension of luten thrust,
(h) the location of the dusting device and, where appropriate, the cooling device.
Measures to ensure safety and health at work and safety of operations
(1) In order to eliminate the consequences of gasification, to interrupt separate ventilation (Section 3 (1)) and in the event of a failure of separate ventilation, the project will identify separate ventilation measures to ensure safety and health at work and safety of operation, including in particular:
(a) the definition of an area at risk from the illegal composition of miners (8) (hereinafter referred to as "the vulnerable area");
(b) the obligation to shut down electrical equipment and machinery in the vulnerable area without delay, 9)
(c) the period after which workers must be removed from the undamaged mine and from the vulnerable area;
(d) measures to prevent unauthorised persons entering the vulnerable area;
(e) identification of the manner, locations and intervals of controls on the composition of the mining air;
(f) identification of the procedure for the recovery of separate ventilation and subsequent inspections of mining works;
(g) the determination of the procedure for re-switching electrical equipment.
(2) The racing mine shall ensure that the measures referred to in paragraph 1, including map documentation indicating the mining and wind situation of the area concerned, up to the total airflow, all electricity distribution, disconnection points and places for unavailability, are part of an emergency plan (10).
Specific provisions
(1) In cases where there is a risk of delay in the rescue of people or in the liquidation of an accident, it is possible to derogate from the provisions of this Decree for the necessary time, provided that the most necessary measures are implemented to ensure safety and health at work and safety of operations.
(2) A solution other than that provided for in this Decree which ensures at least the same level of protection of the safety of persons and property shall be provided in the plan for opening, preparing and capturing, or in the plan for collateral or in the liquidation plan or, where appropriate, in the plan for changing those activities.
Mutual recognition clause
Where that Decree lays down requirements in excess of those laid down in the relevant provisions of the European Communities, those requirements shall not apply to products which have been manufactured or marketed in a Member State of the European Union or Turkey, or originating in one of the States of the European Free Trade Association which is a Contracting Party to the European Economic Area, provided that such a product corresponds to:
(a) the technical regulations which are binding on the production or placing on the market and, where appropriate, on the use of this product in one of those States;
(b) the technical standards or rules of good practice which are issued by the national standardisation body or body equivalent to it, in accordance with the laws and requirements of the State Party to the European Economic Area;
(c) international technical standards, lawfully used in one of those States; or
(d) traditional or innovative production processes used in one of those States in accordance with its legislation, for which there is sufficient detailed technical documentation to ensure that this product can be assessed for the purpose of use, if necessary on the basis of additional (not identical) tests of the product,
if such technical regulations, technical standards, good practice rules or procedures guarantee a level of protection of legitimate interest corresponding to that of the Czech Republic.
Transitional provisions
(1) Paragraph 5 (11), § 13, 16 and 17 do not apply to mining works the stamping of which started before the entry into force of this decree and to the flowing mines for which a dampening programme was declared by the Government of the Czech Republic before the entry into force of this decree and the date of its liquidation.
(2) The organisation of compliance with the provisions of Sections 5 (11), 13, 16 and 17 shall ensure that the provisions of Section 5 (1) of the hazard class are complied with within two years of the entry into force of this Decree.
Efficacy
This Decree takes effect on 1 June 2002.
Chairman:
Prof. JUDr. Makarius, CSc.
Příloha č. 1
Annex No 1 to Decree No 165 / 2002 Coll.
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Regulation Information
| Citation | Decree of the Czech Mining Office No. 165 / 2002 Coll., on separate ventilation in mining activities in flowing mines |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 26.04.2002 |
|---|---|
| Effective from | 01.06.2002 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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