Order of the Czech Mining Office No. 52 / 1997 Coll.
Order of the Czech Mining Office laying down requirements to ensure safety and health at work and safety of operation in the disposal of main mining works
Valid
Effective from 01.05.1997
Zobrazeno prvních 200 z celkem 244 ustanovení tohoto předpisu.
Zobrazit celý předpis →
Pro stažení celého znění použijte tlačítko Stáhnout výše.
52
DECLARATION
Czech Mining Office
of 25 February 1997
laying down requirements to ensure safety and health at work and safety of operations in the disposal of major mining works
The Czech Mining Office provides pursuant to § 6 (6) (a) of the Act of the Czech National Council No. 61 / 1988 Coll., on Mining Activities, Explosives and on State Mining Administration:
GENERAL PROVISIONS
Scope
(1) This decree sets out requirements to ensure safety and health at work and safety of operations in the disposal of the main mining works which result in the surface, (1) ("main mining works") and mining works (2), in the mining activities and in the mining of non-reserved minerals in the underground.
(2) The decree does not apply to mining works resulting from surface mining.
(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) the closure of the pubic ponds - a reinforced concrete or ocelobetone plate, built on the pubic (mouth) pit and dimensioned on the expected load,
(b) filling material - material used to dispose of the main mining work;
(c) reinforced filling material - filling material with hydraulically effective mastics;
d) main mining work - mining work resulting in the surface. The main mine parts are exploratory mining works (shafts, chimneys), openings (pits, stalls), ventilation, drainage, mining and rescue wells. The main mine is not search and reconnaissance wells,
(e) supporting barrier - an object in the mine works contiguous to the main mine work which prevents leakage or other leakage of the filling material from the main mine work into the adjacent mine works,
(f) inertization - creating a non-explosive environment in a liquidated mine,
(g) the safety zone - the immediate vicinity of the liquidated main mine on the surface threatened by the movement of soil and rock in the event of the self-destruct of the liquidated work,
(h) security area - area on the surface in the immediate vicinity of the mouth of the main mining work in which the rising mining air may endanger the life or health of persons;
(i) the discharge zone - the zone where the strength parameters of the rock massif are reduced by natural processes in the upper part of the earth's crust compared to primary rocks;
j) pit stopper - concrete block in the pit creation which completely crosses the pit.
DOCUMENTATION
(1) The documentation will identify the requirements for the disposal of the main mining works and of the mining works containing them and is part of the liquidation plan. 3) This documentation may be provided by organisations authorised to carry out mining activities and activities carried out in a mining way, as well as the design and design of objects and equipment which are part of the mining activity or activity carried out in a mining way.4)
(2) The documentation shall specify in particular:
(a) the method of disposal of the main mine, the type of filling material, its quality and strength of the reinforced filling material;
(b) the length of the sections of the mining works contiguous to the liquidated main mining work to be disposed of simultaneously;
(d) calculation of stability of the column of the filling material and taking into account the change in the fragmentation composition of the filling material after the fall of the pit;
(e) the frequency of sampling for the control tests and the sampling sites of the reinforced powder material;
(f) the location of the supporting barriers and their construction on the basis of static calculation;
(h) the calculation of the dimension and stability of the curing curvature, taking into account the suction and feedback forces of pits filled with unreinforced filling material, the way in which it is set up, the security of the opening in the closing curvature to check the filling condition and the possibility of replenishing the filling material and leaving the pipes for controlling and removing harmful gases;
(i) a safety zone;
(j) the security area;
(k) the method of deleveraging the curvature rate in the safety zone after completion of the disposal operations;
(l) for continuous and coal mines, an assessment of the possible ways of the methane output to the surface, an evaluation of the gas intensity and measures to prevent uncontrolled gas leakage to the surface;
(m) the method and calculation of ventilation, or the method of inertization of the main mine in its liquidation (§ 14a),
(n) the way and places to measure the composition of the mine air;
o) the way in which water inflows are handled, located, their volume and composition determined, the aggressiveness to concrete and the use of binders which are resistant to the action of aggressive water constituents;
(p) the method and extent of disassembly of the impactor equipment or of its retention measures;
q) method and scope of removal of the main mine work equipment,
(r) the manner and extent of demolition of the shaft building, the dismantling of its equipment and mining equipment above the mouth of the main mine, the justification and other measures, where appropriate;
(s) the way in which access to the main mine is sealed at the point of their exit;
(t) the type and quantity of material and equipment for the destruction of the accident, including their location.
The organisation shall develop a technological process before the work or activities related to the disposal of the main mining works, 5) which shall comply with the disposal plan.
DETERMINATION OF MAIN EMPLOYMENT WORKS AND EMPLOYMENT WORKS TO THEM
Principles of liquidation
(1) The pit is disposed of by its complete filling with reinforced filling material. If the nature of the pit so permits, unreinforced filling material may be used on the basis of the permission of the Mining Authority; the authorisation shall include measures to ensure safety with regard to the stability of the pit and its surroundings.
(2) A pit which is not guaranteed to be fully and reliably filled with a pit, or a pit which is expected to be otherwise used, may be disposed of in favourable geological proportions of the surrounding rock massif and, on the basis of the permission of the peripheral mining office, by placing a pit stopper under the discharge zone 4a).
(3) The pit above the pit stopper can only be filled with reinforced filling material.
(4) The discharge zone is set out in the documentation provided for in Article 3, depending on local geological conditions.
(5) The pit stopper at the point of establishment must be anchored in a rock massif. It is possible to use floor penetrating (impact level) to establish a pit stopper. The resistance of the pit stopper to the assumed pressure of the filling material shall be demonstrated in the documentation by calculation.
(6) The method of disposal of the other main mining works will be determined by documentation (§ 3).
(7) All approaches to the destroyed pit from the surface, in particular wind ducts to the pit, channel for emergency wind supply, channel for wind heating, emergency exit from the mine, ducts and piping lines, must also be filled.
(8) The stack is disposed of by filling it with filling material and closing it. The length of the line section to be filled and the method of closing access to the table shall be determined by the documentation.
(9) Work in a liquidated main mine and on the surface of the safety area is work with increased danger. 7)
(10) The organisation is obliged to process the technical means of disposal (hereinafter referred to as "the project '), which is part of the liquidation plan, for the disposal of the main mining works and mining works to them.
Requirements for filling material
(1) Only non-combustible, insoluble, non-attentive and non-bulky filling material which must not endanger the environment by harmful fumes or leases with toxic substances may be used to dispose of the main mine. The filling material shall not contain metallic objects. In order to use material other than natural stone, natural stone or secondary raw materials, the organisation shall seek prior approval from the competent environmental authorities. 8)
(2) The size of the grain of filling material as determined by the project must be ensured by passing through a grate of a mesh of not more than 250 x 250 mm placed on the pubic pit at the drop point.
(3) The design strength of the reinforced filling material shall be verified by testing before the start of the disposal operations.
(4) The organisation shall ensure that the quality of the solidified filling material is checked for each type of material used prior to the start of the sprinkling and for at least 200 m3 of the filling material.
(5) If the results of the tests referred to in paragraph 4 do not correspond to the documentation for the specified values, the winding-up work shall be interrupted until the correction is completed.
Ensuring stability of the filling material
(1) The stability of the column of the filling material is demonstrated by calculation, taking into account the possible effects of rolling of mining works around the main mine.
(2) When the main mine is disposed of with reinforced filling material, measures shall be laid down to prevent any undesirable spill-over of the filling material into the main mine.
(3) Measures are also laid down for the possible sprinkling of powder into the flooded or flooded premises of the liquidated main mine.
Brackets
(1) The design of the supporting barrier, its location, the method of ensuring stability of the column of unreinforced filling material and the resistance to load by hydrostatic pressure shall be determined by the documentation.
(2) In a pit which cannot be constructed for mining purposes by supporting the dam in the mines in which they are sewn into them, the filling of the pit creature in a specified zone of storehouse penetration from a grade of 63 - 125 mm fraction, supplemented, where appropriate, by sharp brush stone up to a maximum of 250 mm7a).
(3) The powder referred to in paragraph 2 shall exceed the height of the storey penetration by four times the diameter or maximum size of the pit and shall start at least twice the depth of the diameter or the maximum size of the pit below the level of the relevant floor.
Clamping pits
(1) The clogged pits are covered with a curling fat whose dimension and stability must be documented in the documentation by a control calculation.
(2) The curvature bellows shall be designed for a uniform load of 33kPa unless a higher load is expected, but at least 450 mm thick. The closure of the pubic pits of pits filled with unsolidified filling material are also dimensioned on suction and feedback forces that would result from sudden passing of the column of the material.
(3) If the pit is not filled with reinforced filling material, a curvature seal is established, the smallest size of which shall be determined in accordance with Annex 3 to this Decree.
(4) The closure of the pubic field is based on solid rock or on a circumferential base strip, separated from the pit wall.
(5) A closed hole of not less than 0,6 x 0,6 m shall be left in the curvature level to check the filling condition and to allow replenishment of the filling material. In the case of continuous mines it is also necessary to install piping for inspection and, where appropriate, the removal of harmful gases with a diameter of at least 150 mm and up to a height of at least 2,5 m above the pubic field.
(6) The closure of the pubic hair shall be marked in a permanent manner. The designation shall include the name of the pit and mine, its light diameter and depth, the year of commencement of the pit dig and the year of end of its disposal, an indication of the method of disposal of the pit, the type of filling material, the size of the safety zone and the warning of potential gas hazards. It shall also be marked with the mouth of the destroyed stol.
(7) In the case of pits flowing down, the gases migrating between the rock mass and the pit wall shall be diverted by a exhaust chimney. The exhaust pipe shall be equipped with a closing fittings and shall allow sampling and connection to the exhaust system or equipment.
SECURITY MEASURES
Safety zone
(1) The safety zone shall be established by the organisation on the surface around the liquidated main mine. The size of the safety zone shall be determined taking into account in particular the state and manner of disposal of the main mine and the mining, geological, hydrogeological and geotechnology situation in its immediate vicinity.
(2) If the pit is not filled with reinforced filling material, the use of the territory in the safety zone shall be permitted only if additional safety and protective measures have been laid down.
(3) The safety zone should be indicated in the metering and geological documentation.
(4) The organisation shall submit a proposal to the General Building Office for a decision on the protection zone. The establishment of the safety zone and the submission of the proposal to the general building office shall also be notified by the organisation to the municipal authority of the municipality with extended scope. A copy of the decision authorising the liquidation of the main mining work shall be sent by the district mining office to the competent general construction office and the municipal office of the municipality with extended scope.
Security area
(1) A security area shall be established around its mouth when the main mine is destroyed. The safety area shall be demarcated on a flat basis at least within the scope of the safety zone. Its height shall be determined by the organisation in the documentation in such a way as to avoid the possible adverse effects of mining gases. 10)
(2) For the duration of the disposal operations, the security area must be enclosed and marked with warning signs concerning the prohibition of access to unauthorised persons, the prohibition on smoking and the use of open fire.
(3) Electrical equipment in the safety area must comply with the environment and space in which the main mine was operated by its implementation. 11)
Security measures
(1) Before filling the pit, obstacles which could cause the creation of loose spaces in the filling material, such as deposits, frying between the forest and the quarry, folding bridges, etc. The pins can only be left if their removal would weaken the stability of the pit reinforcement.
(2) In the case of non-flowing mines, the filling material can be poured directly from the vehicles into the main mine work, provided that the stability of the mouth of the main mine work is ensured and security stops have been built or the fall of the truck into the main mine work otherwise prevented.
(3) After the winding-up work has been completed, the curvature closure and, where appropriate, the safety zone shall be enclosed in accordance with the procedure laid down in Article 11 (4).
(4) A stock of material and equipment in the event of the destruction of the accident must be stored in the vicinity of the main mine work being disposed of on-site and in the amount of documentation specified.
Special measures for flowing mines
(1) If the mine was classified as fluent at the time of its operation, the gas content, in particular for methane, of the mine should be evaluated before the documentation is processed, taking into account the effects of barometric pressure.
(2) In order to assess the possible output of methane from the mine spaces downstream of the pit and abandoned floors, it is necessary to verify the composition of the air even in the mine parts of closed dams.
(3) The liquidated main mine must be ventilated in a manner specified by the documentation. The transit wind current in the liquidated main mine must be preserved as long as possible. If the filling material is not sprinkled into an inert environment, the documentation shall determine the necessary measures against possible explosions, in particular of the metallised mixture.
(4) When the main mine work of a flowing mine is disposed of, the filling material must be poured into the main mine work by the conveyor continuously between the air checks provided for in Section 15. The sprinkling intensity shall be at least 2 kg per second of the filling material per square metre of the main mine section. The filling of the filling material onto the conveyor can only be carried out from outside the security area of the liquidated main mine.
(5) A pipe which, according to documentation, is left in a liquidated vertical or inclined main mine work shall, unless it serves for ventilation or pumping water, gas discharge or gas indication, or unless it is left for the future filling of open spaces, be filled with reinforced filling material. If the pipes are left loose, they must be fitted with a cap.
(6) Any access to the liquidated main mine from the surface must be disposed of. The documentation shall determine the time-frame for their disposal, in particular depending on the possible inert air in the liquidated main mine.
Inertization
(1) The inert documentation shall include in particular:
(a) the type of inert gases to be used to inert;
(b) equipment intended for the discharge of inert gases into the main mine;
(c) the way in which inertisation is carried out;
(d) the ratio of inert gas to methane to which inertization will be achieved and the method and frequency of verification;
(e) measures to ensure safety and health at work.
(2) Conditions must be established for inertization before the pit is destroyed.
(3) The source of inert gas shall be located outside the security area.
(4) After inert treatment, the filling of the pit must start immediately.
(1) When the pit of a flowing mine is disposed of, the concentration of methan12 is continuously checked) from a level of at least 50 m below the pits and from wind, heating and emergency channels. Barometric pressure is also measured continuously.
(2) A control of the concentration of methane above the level of the powder shall also be ensured at the whole height of the still unfilled pit, always before the start of the fill, during the interruption of the powder for more than 180 minutes and at a concentration of methane above 1% at the measuring points referred to in paragraph 1 and at a more significant drop in barometric pressure. The method and places of measurement shall be determined by the documentation and the technological procedure. A decrease of more than 5 hPa from the last measurement is considered to be a more pronounced drop in barometric pressure.
(3) When the concentration of 1% methane is exceeded, an optical and acoustic warning signal must be transmitted to the filling site in the pit safety area, the actual filling of the pit must be interrupted and people removed from the pit safety area. The exchange technician or foreman shall be informed of this without delay of the race mine or its designated employee.
CHECKS, RECORDS AND FINAL REPORT
Checks
(1) The quality of the filling material, the quantity of the stored filling material and its basic properties are checked during the filling process according to documentation.
(2) The height of the powder shall be measured every time the volume is filled, which corresponds to the recalculated height of the 50 m mine. If the difference between the measured height of the powder and the height of the 50 m of the mine is greater than 20%, the measurement shall be repeated and a further procedure shall be established for filling the main mine. For pits disposed of in accordance with Paragraph 14 (4), the height of the powder shall be measured at least once a day.
(3) The filling shall also be interrupted if the powder level has decreased by more than 20% of the height since the last measurement on the previous completion of the filling works. The facts referred to in Articles 15 (3) and 16 (2) and (3) are serious events, 13) which are subject to reporting obligations.
(4) In the case of a liquidated main mine, it is necessary to check the seat of the filling material, the drop in the surrounding area of the pit and the output of methane, or other harmful gases, if expected, for at least three years,
(a) at least once a month for pits covered with unreinforced filling material;
(b) at least once every three months, in the case of pits covered with reinforced filling material and stacks.
(5) At the end of the three-year period following the end of the liquidation, the check of the pits shall continue to be carried out at least once a year. For other main mining works, the checks shall be carried out according to the timetable of the processed organisation; the control time range shall not exceed 24 months.
(6) If an object has been left over the destroyed pit or another activity is carried out, it shall specify the time limits and manner of carrying out controls by the district mining office when authorising mining activities - the disposal of the main mining works.
Records and final report
(1) The results of the checks provided for in Article 16 are recorded. The organisation shall ensure that records are kept for at least five years.
(2) The characteristics of the materials used, the data on the equipment left in the destroyed works, the data on geological conditions, defences, the quality and quantity of the injection material, the loss of the filling material and other accidents, the unusual phenomena and other details of the works, the results of the checks and the taking-over of the work with the signatures of the controlling authorities, the results of the control tests of the materials used, the presence of water, the conformity of the calculated and actual amount of the filling material and whether it is sprinkled into a dry or watered pit. The results of the methane and barometric pressure detection shall also be recorded for coal mines.
(3) On completion of the disposal of all the main mining works, the mine shall be processed and submitted by the organisation to the District Mining Office with the records of the main mining works referred to in Annexes 1 and 2 and shall also be deposited in accordance with a special regulation. 14)
(4) The final report, the records of the main mining works and the metering and geological documentation stored on the storage media shall be transmitted by the organisation in duplicate to the Central Mining Office no later than one year after the end of the liquidation.
(5) Only organisations referred to in Article 3 (1.4) may obtain the documentation referred to in paragraphs 3 and 4)
TRANSITIONAL AND FINAL PROVISIONS
(1) The requirements of Paragraph 11 must be ensured no later than three years after the entry into force of this Decree also in the case of pits which have been destroyed before the entry into force of this Decree and whose location is known. For other main mining works which were disposed of before the decree became effective and the location of which is known, the requirements of Section 11 must be secured by 31 December 2010.
(2) Within six months of the entry into force of this Decree, the organisation shall submit to the competent district mining authority a time-limit for the implementation of the requirement under Paragraph 18 (1).
(1) Regular annual checks on the destroyed main mining works pursuant to Article 16 (5) shall also be carried out on the main mining works disposed of before the expiry of this decree, the location of which is known and accessible through the mouth. If these pits cannot be controlled by sitting and falling columns of the filling material in the pit, at least any changes to the surface of the pit mouth and its surrounding area within the specified safety zone shall be checked.
(2) The results of the checks provided for in Articles 16 (4) and (5) and 19 (1), including the measures implemented, shall be submitted by the organisation to the competent district mining authority on an annual basis.
This decree applies mutatis mutandis to the disposal of old mining workers 15) to the surface.
Exceptions
(1) The organisation (16) may derogate from the provisions of this decree in order to save the life or health of people in cases where there is a risk of delay or in the event of the liquidation of a serious accident in the operation (accident).
(2) Except in the cases referred to in paragraph 1, the organisation16) may derogate from the provisions of Sections 9 (4), 10 (4) and 10 (5), 13 (1) and 14 (4) of this Decree only with the agreement of the Czech Mining Authority and under the conditions laid down by it on the proposal of the organisation, supported by the proposal for the necessary replacement measures.
Efficacy
This Decree shall take effect on 1 May 1997.
Chairman:
Ing. Bartoš v. r.
Příloha č. 1
Annex No 1
Content of the final report
1. Historical development of exploded bearing, charter, owners, total volume of extracted minerals.
2. Geologic-tectonic characteristics of the bearing, hydrogeological ratios, qualitative indicators of the conquered mineral, final calculation of stocks.
3. Condition of mining work on the bearing at the time of disposal, method of opening, spreading, used mining methods, retained stock by category.
4. Basic safety problems at the time of the bearing explosion and in its disposal, safety precautions in terms of danger:
(a) gas and money explosions;
(b) spontaneous combustion and mining fires;
(c) drains of water and mud;
(d) rock, coal and gas ruptures;
(e) mine shocks,
(f) ionising radiation;
(g) other dangerous phenomena.
5. List of objects and interests protected under specific regulations and technical measures to ensure the requirements resulting from decisions of the institutions and from agreements with the authorities and organisations to which their protection is due.
6. Pasportization of mining works at the mouth of the surface or near the surface within the range of the direct impact of the release processes, the way in which they are disposed of, security measures.
7. Method of disposal of other mining works.
8. Pasportization of surface objects which are expected to affect mining activities.
9. A definitive solution to issues related to mine water and mine gas output:
(a) possible communication of surface water with the mine environment;
(b) details of neighbouring mines or areas, in particular with regard to the way in which the waters are contacted and resolved;
(c) the quantities of mining water and the planned frequency of measurements after disposal operations;
Sign in for notes, favorites and notifications
Regulation Information
| Citation | Decree of the Czech Mining Office No. 52 / 1997 Coll., laying down requirements for the safety and health of workers and the safety of operations in the disposal of main mining works |
|---|---|
| Regulation Type | - |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 28.03.1997 |
|---|---|
| Effective from | 01.05.1997 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
Comments 0