Decree No. 72 / 2002 Coll.
Order of the Czech Mining Office on Mining Degrading
Valid
Order
Effective from 01.04.2002
Text versions:
01.04.2002
01.03.2002
Contents
72
DECLARATION
Czech Mining Office
of 21 January 2002
on mine degradation
The Czech Mining Authority provides pursuant to § 5 (3) and § 6 (6) (a) of Act No. 61 / 1988 Coll., on Mining Activities, Explosives and State Mining Administration, as amended by Act No. 542 / 1991 Coll.:
GENERAL PROVISIONS
Subject matter
The decree sets out requirements to ensure safety and health at work and safety of operations, to establish, operate and control mining degationfacilities and to the qualification and competence of personnel in the operation of mining degationfacilities in organisation1) performing mining activity in the fluent coal mines of Class II (hereinafter referred to as "mine ').
Interpretation of terms
For the purposes of this decree, it shall be considered as:
(a) the main pipeline - the pipeline located in the main mine and on the surface up to the degas station, which is used to drain the degaussed gas mixture;
(b) mine degradation - a set of activities and equipment used for the deliberate and controlled extraction of methane from coal alloy, surrounding rocks or open spaces and subsequent isolated removal of gas mixture from gas sources in the mine gas pipeline, including the gas station;
(c) degasification station - a separate fenced object made of non-combustible material in which a device is installed to induce the underpressure needed for degrading and equipment to control the operation of the mine degrading and its safety;
(d) debasing system - a file consisting of debasing sources, pipelines and equipment used in mining debasing,
(e) degasification sources - sealed and closed deburring wells and closed or inaccessible mining works, or parts thereof, from which the gas mixture is removed from the gas pipeline to the degas station;
(f) sub-pipeline - pipeline used to remove the gas mixture from the degaussing source to the main pipeline,
(g) the opening column - a steel pipe embedded in a well and sealed in a manner which prevents gas leakage, which is dimensioned to the expected pressure, but at least 0,6 MPa, and fitted with a closing fittings enabling connection to the degrading system;
(h) the lost pipeline - the pipeline deliberately left in inaccessible mining works (old or destroyed mining works) which is used to degrade and is connected to a partial pipeline.
Establishment and operation of a degationalisation system
(1) Mining activities in the mine must not be carried out without a degrading system built according to the project.
(2) If several deactivation stations are involved in the deactivation system, some deactivation stations may be disabled if the other stations ensure the desired deactivation effect at the mine.
Management of mining degausings
(1) In order to ensure the professional management of mining degausings and to ensure the safe operation and control of the degaussing system, the workers with adequate knowledge of the management of mining degausings (hereinafter referred to as the "head of mining degausings") will designate a race mine.
(2) Only a staff member who has successfully completed a master's programme in the field of mining and mining geology, metallurgy and foundries with a focus on mining with at least three years of experience at a continuous mine, of which at least one year in the management, operation and control of mining degation.3)
(3) Only a staff member with at least a full secondary vocational education in the mining, engineering or electrical direction with at least one year's experience on a continuous mine, who completed a 40-hour mining Degasation course before being assigned to his duties, completed by a successfully completed mining degationation test before the commission of the District Mining Office.
(4) The management, operation and control of mining and foundry activities may be carried out only by staff who have successfully completed a university education programme in the field of mining and mining geology, metallurgy and foundry with a focus on mining, machinery or electrical engineering with at least an annual mining technical experience at a continuous mine, and by staff with full secondary vocational training in the relevant direction with at least an annual mining technical practice at a continuous mine, who have completed a 40-hour mining Degasation course completed by a successful examination of mining degausment before the commission of the Circular.
(5) Only a staff member who has received theoretical and practical training for at least 4 weeks for this activity completed by a successfully completed mining debriefing test before the commission of the district mining office may be assigned to the plant driver.
(6) Only a staff member who has completed a 40-hour mining-tasting course completed by a successfully performed mining-degrading test before the commission of the district mining office may be the gas meter of the degationalisation system.
(7) Staff members who fulfil the requirements set out in paragraphs 2 to 6 but who have not performed those functions for more than 3 years may re-perform these functions after successful completion of the mining-degrading tests before the Board of the District Mining Office.
PROJECT, TECHNOLOGICAL PROCEDURE AND MAP DOCUMENTATION
Project
(1) In order to ensure the safety of mine operation, the construction and reconstruction of degas stations, the laying of pipelines and the establishment of degas resources can only be carried out on the basis of a mining deactivation project. The project shall include:
(a) basic geological data on the area to be degraded;
(b) a forecast of gas and an analysis of the impact of geological and material technical conditions on ventilation and degasions;
(c) the technical and technological data on the mining works in which the degrading will take place;
(d) the necessary data on the method of degaussing and the technology equipment for extracting the gas mixture;
(e) the determination of the necessary diameter of the pipeline, the location of safety seals, closing fittings, measurement clones and drains and the arrangements for the use of the lost pipeline;
(f) basic data on degaussing sources, how they are connected to, deployed and disposed of;
(g) map and drawing documentation, (4) time advance of the degrading before the management of mining works;
(h) on a liquidated bottom system and gas source monitoring sites;
(i) opposing assessment of the project.
(2) In order to ensure the safety of the operation of the mine work referred to in point (c) of paragraph 1, the organisation shall draw up a separate mining deactivation project as appropriate in accordance with paragraph 1. For the stamping of long mining works a type project of mining degausings can be developed.
(3) The projects referred to in paragraphs 1 and 2 and their amendments shall be approved by the racing mines on the basis of their opposition assessments.
Technological procedure
(1) The adjustment of the gas pipeline and the setting up of degationalresources is carried out according to the technological procedure, 5) which is based on an approved project.
(2) In the case where a well is used as a degrading source, the mouth of the well shall be equipped with an opening column of at least 6 m in length tested for strength and tightness. The strength test shall be carried out before the initial column is deployed, at a test pressure equal to twice the nominal pressure; The leak test shall be carried out on completion of the initial column assembly, at a test pressure equal to the expected operating pressure.
Map documentation
In the map documentation conducted under the special legislation (6), the degrading system and the location of measurement fittings are also covered.
TRAINING OF EMPLOYERS AND PROTECTION OF GAS AND DOWN OPERATIONS
Lessons of staff
Staff members who are to work or enter the premises where the mining equipment is located shall be informed in advance of the prohibition of tampering with the equipment without a warrant and of measures to protect the degrading system.
Pipeline protection and mine operation
(1) In order to ensure the safe operation of the pipeline, it is necessary to protect it from damage to the fall of rock, the pressure of rock mass, the effects of shredding and the effects of the operation of transport equipment.
(2) Changes in the degrading system and in the degrading system which have caused or may cause an increase in the concentration of methane in the mining air above 0,8% shall be reported to the inspection service without delay by the person who identified or intends to carry them out. 7)
CONTROL AND MEASUREMENT OF THE DEPARATION SYSTEM
Control of the deactivation system
(1) The deactivation system shall be checked by the staff member designated by the head of the mine deactivation system at least once a month, and by the regulatory and closing fittings, drains and measurement fittings at least once every 6 months.
(2) A deg source with a methane concentration of less than 30% is controlled by an employee designated by the head of mining degausings at least once a day; This check shall also determine the concentration of methane in the aspirated mixture.
(3) The result of the check shall be recorded in writing by the person who carried out the check. The model form for keeping a written record is set out in Annex 1.
(4) When determining the presence of carbon monoxide in a degaused gas mixture at a concentration greater than 100 ppm for the sub-pipeline and 30 ppm for the main pipeline, it is necessary to determine its cause without delay and take the necessary measures.
Measurement of the degrading system
(1) The measurement of the volume flow and pressure of the gas mixture and the sampling of the gas mixture and their analyses for carbon dioxide, methane, oxygen and carbon monoxide in the gas pipelines shall be carried out at least once a month at the sites designated by the project.
(2) The measurements referred to in paragraph 1 for partial pipelines shall be carried out on the spot before their fitting into the main pipeline.
(3) The pressure of the gas mixture and the concentration of methane in the degasification source connected to the degas system shall be measured at least once a month.
(4) The concentration of methane and carbon monoxide in the drained mixture shall be measured once a week in the lost pipeline, which is located in the elderly behind the broken operation.
(5) The measurement and sampling of the gas mixture referred to in paragraphs 1 to 4 shall be carried out by the staff designated by the head of the mine degradation; the results of the measurements shall be recorded in writing in accordance with the model set out in Annex 2.
EQUIPMENT, OPERATIONS AND CONTROL OF THE DEPARATION STATION
Detention station equipment
(1) The equipment of a deactivation station shall identify the project in such a way as to ensure the safe operation of the deactivation system and to create conditions for sufficiently effective degrading.
(2) The project referred to in paragraph 1 shall identify:
(a) the number and power of gas-mixer pumps (pumps, compressors, blowers, etc.) including at least one backup pump of the same power as the most powerful pump;
(b) the location, number and type of measuring registration devices on the intake side of the gas pipeline to the degasification station for the measurement of pressure, volume flow and temperature of the gas mixture and for the continuous control of the concentration of methane in the gas mixture; only a methane concentration control device can be used to enable the acoustic and optical signaling of the decrease of methane concentration in the gas mixture to 40% and the off-drive of pumps when the methane concentration in the gas mixture falls below 30%, with a delay in determining methane concentration not exceeding 60 seconds;
(c) the location, number and type of measuring instruments on the extruding side of the gas pipeline from the gas station for measuring the pressure and temperature of the gas mixture and for checking the concentration of methane in the gas mixture;
(d) the location and type of pressure gauge on the suction and displacement throats of each pump;
(e) the location and type of pressure gauge for measuring water pressure on water pump rotor seals; Only a pressure gauge can be used to signal a drop in water pressure below the specified limit and automatically stop the pump operation;
(f) the location and type of the safety seal against the flame leak on the suction side of the gas pipeline to the gas station; such a safety cap shall be used on the discharge side of the gas pipeline from the gas station if the gas mixture is supplied to an appliance less than 1000 m away from the gas station;
(g) the method of checking the pressure loss of safety seals referred to in (f);
h) the method of cleaning the ballpoint filling of the safety cap when increasing its pressure loss by 5 K Pa versus baseline and replacing it with a second cap during cleaning,
(i) the method of conducting and diameters of the metal pipe for the distribution of the gas mixture;
(j) types of rubber compensators and metal hugs for their connections for connecting gas-mixture pumps and for connecting flexible connection devices;
(k) the method of discharge of the gas mixture outside the pumps by the gas pipeline for discharge of the gas mixture into the air, so that the outcome of the gas pipeline is:
1. protected from lightning,
2. at least 20 m from the airhole, the main fan diffuser and the bare electrical line,
3. equipped with flame extinguishing equipment,
4. carried out at least 3 m above the highest building situated within a radius of 20 m from the exhaust point and at least 10 m above the ground level;
5. made of non-flammable and antistatic material,
(l) the method of draining the waste water from the pumps by pipelines outside the premises and fenced space of the degas station,
(m) the location of at least one continuous meter sensor in a deg station at the site with the highest probability of methane occurring;
(n) the method by which the measured concentration of methane in the atmosphere of the degas station shall be more than 0,5% acoustically and optically indicated to the degas station operator or inspection service by the meta meter referred to in (m).
(3) Only electrical equipment which complies with the relevant technical conditions for the environment may be used in the deactivation station. 8)
Operation of the degassing station
(1) A degas station may be used only for degrading purposes. Only personnel designated by the head of the mine deactivation to operate and maintain the deactivation station and control authorities may be allowed access to the deactivation station.
(2) A deactivation station may be operated without the constant presence of the driver, provided that its equipment complies with the requirements of a specific legislation. 9)
(3) The operation of the deactivation station on an active mine is continuous. Exceptionally, the operation of the degas station may be interrupted only on written order of the race mine for the period necessary for the revision, repair, etc., and provided that the operation of the degas station is restored at least 8 hours before the start of the mining or raiding works in the mine, unless the race mine determines a different number of hours on the basis of the check of the efficiency of the deactivation. The interruption of the deactivation shall be recorded in the operating book of the deactivation station.
(4) The operator and maintenance guidelines10) The degasification stations also contain the measurement intervals of methane concentrations, the measures to be taken when determining the concentration of methane 0,5% and higher in the atmosphere of the degas station, the abrupt decrease in methane concentration in the degavanted gas mixture by more than 10%, as well as the reduction in methane concentration in the degavanted gas mixture below 40% and below 30%, and measures to regulate ventilation and heating of the degationalisation station.
(5) It is forbidden to smoke and use open fires in the degrading station and in its fenced space. This prohibition shall also apply within 20 m of the gas pipeline being discharged into the atmosphere. The prohibition shall be indicated by appropriate safety marks. 11)
(6) A functional telephone connection with the inspection service is a condition for safe operation of the deactivation station.
Control of operation of the deactivation station
(1) The operation of the deactivation station is checked
(a) an employee designated by the head of the mining degation-
1. at least once per shift by comparing the data of the recording measuring instruments with those of the instruments for controlling the measurement of methane concentration. If differences of more than 1% for methane concentration are detected, the next procedure shall follow the instructions for operation and maintenance of the degas station,
2. once a day in order to verify the loss of pressure on safety closures;
(b) an employee designated by a race mine at least once every 14 days, checking the state of the entire gas mixture distribution in the degasification station (pipes, hoses).
(2) In the event of a malfunction of the registration measuring instruments, the measurement of methane concentration in the gas mixture at intervals not exceeding 10 minutes and the temperature and pressure of the gas mixture at intervals not exceeding 30 minutes and recording of measured data and measurement time shall be permitted as a replacement.
(3) The results of the checks and measurements shall be recorded by the person who carried them out in a written record, a specimen of which appears in Annexes 3 and 4.
(4) Once a month
(a) sampling and analysis for methane, carbon dioxide, oxygen and carbon monoxide of an exhaust gas mixture in a degasification station;
(b) the inspection of registration and safety equipment by an authorised worker or an authorised organisation;
(c) control of gas mixer pumps and electrical equipment.
(5) The organisation shall keep records and results of the analyses and checks referred to in paragraph 4 for at least 3 years.
TRANSITIONAL AND FINAL PROVISIONS
Transitional provisions
(1) Degasification stations and pipelines put into use before the entry into force of this Decree may be used provided that they comply with the requirements of generally binding legislation in force at the time of their entry into force.
(2) Employees carrying out the functions referred to in Paragraph 4 and carrying out an examination in accordance with the regulations still in force shall be deemed to satisfy the requirements of this Decree for the duration of these functions.
Repeal
They shall be deleted:
1. The proceeds of the Czech Mining Office No. 1 / 1988 on mining degausation (reg. 4 / 1988 Coll.).
2. The proceeds of the Czech Mining Office No 1 / 1991 of 1 November 1991 amending the yield of the Czech Mining Office No. 1 / 1988 on mining degausation (Reg. under No. 518 in the amount of 98 / 1991 Coll.).
Efficacy
This Decree shall take effect on 1 April 2002.
Chairman:
Prof. JUDr. Makarius, CSc.
Příloha č. 1
Annex No 1 to Decree No 72 / 2002 Coll.
Příloha č. 2
Annex No 2 to Decree No 72 / 2002 Coll.
Příloha č. 3
Annex No 3 to Decree No 72 / 2002 Coll.
Příloha č. 4
Annex No 4 to Decree No 72 / 2002 Coll.
1) Article 3a of Act No. 61 / 1988 Coll., on Mining Activities, Explosives and State Mining Administration, as amended by Act No. 315 / 2001 Coll.
2) Paragraph 79 (4) (a) of Decree No. 22 / 1989 Coll., on the safety and health of workers and the safety of operations in mining activities and the conquest of non-reserved minerals in the underground.
3) Paragraph 41 (1) (h) of Act No. 61 / 1988 Coll.
4) Sections 21 and 24 of Decree No. 435 / 1992 Coll., on the metering documentation of mining activities and certain activities carried out in a mining way.
5) § 5 of Decree No. 22 / 1989 Coll.
6) § 26 of Decree No. 435 / 1992 Coll.
7) § 10 of Decree No. 22 / 1989 Coll.
8) § 232 (3) of Decree No 22 / 1989 Coll.
9) § 219 of Decree No. 22 / 1989 Coll.
10) § 216 of Decree No. 22 / 1989 Coll.
11) ČSN ISO 3864 Safety colours and safety marks.
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Regulation Information
| Citation | Decree of the Czech Mining Office No. 72 / 2002 Coll., on mining |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 01.03.2002 |
|---|---|
| Effective from | 01.04.2002 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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