Decree No. 659 / 2004 Coll.
Ordinance on safety and health at work and safety of mining operations with the risk of mine shocks
Valid
Effective from 15.01.2005
659
DECLARATION
of 17 December 2004
on safety and health at work and safety at mines with the risk of mine shocks
The Czech Mining Authority provides pursuant to Sections 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.:
Subject matter
(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 rules and of rules on information society services, as amended by Directive 98 / 48 / EC.
(2) This decree regulates the safety and health of workers and the safety of operations in mines with the risk of mine shocks (1).
Interpretation of terms
For the purposes of this decree, they shall be considered as:
(a) mining shock (hereinafter referred to as "shock") - a natural phenomenon of a sudden violation of mountain massif which is manifested by the sudden ejection or casting of rocks into the mine with the result of its apparent and permanent deformation; This can be accompanied by a seismic and sound effect in this mining work. In this process, the gaseous and liquid components contained in the mountain massif do not materially participate. According to the location of the release of flexible energy and the violation of mountain massif, the shocks are divided into sluggish and higher-altitude shocks,
(b) the shock phenomenon - the natural phenomenon of the sudden violation of the mountain mass without deformation of the mine; For the purposes of this Regulation, the following definitions apply: the mine work is clearly not deformed in the event of a shock, but the deformations are measurable,
(c) counter-shock prevention - a system of activities to identify the risk of shock, and measures to prevent or limit their consequences;
(d) part of the mountain mass - a spatial demarcated area in the conquest area;
(e) a forecast of the occurrence of shocks - a summary of the activities to determine the susceptibility of the mountain mass or part of it to the occurrence of shocks, to determine the degree of risk of the occurrence of shocks in planned, designed and conducted mining works and to correctly select means of counter-shock prevention; the shock forecast is divided into regional, local and continuous;
(f) regional forecast - a summary of the activities enabling the determination of the susceptibility of parts of mountain mass, of its plantations, of their compositions or of their parts to shake on the basis of an assessment of natural conditions and an assessment of the occurrence of shocks in analogous conditions;
(g) local forecast - a summary of activities enabling the mining work to be included in the degree of shock hazards already in the planning and planning phase;
(h) continuous forecast - a summary of the activities carried out in the mining works to identify the sites of increased tensions, verify the protection zone and, where appropriate, check the effectiveness of active means of shock prevention;
(i) active means of shock prevention - a summary of activities aimed at reducing the risk of shock,
(j) passive means of shock prevention - a summary of activities, measures and equipment aimed at limiting the effects of shock;
(k) the protected area - part of the mountain massif in which the extraction of the protective component has achieved a reduction in the stress acting before it is achieved;
(l) a protective slot (part of the bearing) - a sole, a gangway or part of a bearing, the achievement of which allows mining works to be carried out in a suitable space and time in a protected area in another component or in another gangway of the same component or in another part of the bearing;
(m) the protection zone - an area in the compound adjacent to a mine in which the compound is unable to accumulate flexible energy and creates a damping layer when releasing flexible energy accumulated beyond that zone;
(n) primary voltage - the voltage in the mountain mass existing as a result of the action of natural agents (gravitational, tectonic, etc.) before affecting the mass by mining activity,
o) additional voltage - the voltage in the mountain mass which is higher than the primary voltage,
(p) the impact of additional voltage from failure "L" - the value determined from the nomogram in the working rules (§ 3 (1)) or more precise methods approved by the Czech Mining Office,
(q) the retained pillar - the unconquered part of the verse,
(r) signs of shock - observable or measurable phenomena or the development of seismic activity, which, on the basis of previous experience in the management of mining works in a particular part of the mountain mass, are known to be related to the accumulation of stress in the mass and may prevent the occurrence of shocks;
(s) earthquakes - mines where the shock occurred or which may be threatened by the shock on the basis of a regional forecast.
Management of shock prevention
(1) Organization2) must ensure counter-shock prevention. The organisation shall ensure a consistent process and management of anti-shock prevention at the mines by issuing instructions (working rules) 3) discussed with the Regional Mining Authority and shall establish organisational arrangements to ensure that the obligations imposed by this Decree are fulfilled.
(2) In order to manage counter-shock prevention, at each mine, the post (function) of geometrics occupied by a staff member of an organisation with a master's education provided for by a special legislature4) with at least three years of mining practice in earthquakes mines.
(3) The Geomechanik must demonstrate his competence to perform his duties by examination before the Panel of the Circuit Mining Office.
(4) A workstation must be set up on mines with shock hazards which continuously monitor and evaluate seismic activity within the conquest area. In the event of an interruption of mining work in the mine, the racing mine may interrupt the continuity of evaluation for the relevant mine. However, evaluation must be carried out no later than before the recovery of mining work.
Classification of parts of mountain mass
All parts of mountain massif are considered to be hazardous shocks in quarries where, based on the results of the regional forecast, they are not classified as parts of mountain quarries without any risk of quakes.
Classification of mining works
(1) All conducted mining works, except those which are carried out in parts of the mountain mass without any risk of shock, shall be classified by the racing dol5) according to the results of the local forecast into the 1st, 2nd or 3rd degree of shock risk. Only parts of mining works can be included in this way.
(2) Mining works at the first stage of the risk of shaking are to be classified
(a) all mining works carried out outside the bay;
(b) long mining works in a composition of power up to 1.2 m with a supply of accompanying rocks;
(c) mining works in the compound, the management of which is not expected to cause a shock.
(3) Mining works in the 2nd degree of shock hazard include mining works, the management of which cannot exclude the risk of shock.
(4) Mining works at the 3rd stage of the shock hazard are classified as mining works where the risk of the shock or of the shock has already occurred during their management.
Impact prognosis
(1) Regional and local forecasts must be carried out in sufficient time to detect and evaluate the necessary data in the shock mines.
(2) The regional forecast serves to define parts of the mountain mass where there is no risk of shock.
(3) The basis for the regional forecast is natural data on deposits and parts of mountain massif in relation to the compositions planned for conquest. The main data evaluated are in particular:
(a) Litology of the peer sequence;
(b) physical-mechanical properties of coal and rock;
(c) depth of deposits below the surface, power and inclination of layers,
d) structurally-tectonic construction.
(4) The local forecast is carried out in parts of the mountain mass with a risk of shock. On the basis of the results of the local forecast, mining works are classified in the 1st, 2nd or 3rd degree of shock hazards.
(5) The basis for the local forecast is in particular:
(a) storage ratios (for example, depth of storage and strength of the compound),
(b) the current mining activity (for example, the edges of the non-edges, the retained pillars, the presence of the old ones, the dismantling of the protective compound).
(6) The continuous forecast shall be carried out in the management of mining works in parts of the mountain massif with a risk of shock. The way in which the interim forecast is to be implemented is set out in the opening plan, the preparation and the execution plan (6). The location of the interim forecast, its frequency, means and the use of their results shall specify the technological process. The results of the interim forecast may be used to shift mining works to levels of danger other than those laid down in the local forecast. The mining work in which there was a mining shake is always transferred to the 3rd degree of the risk of shaking.
(7) The basis for the interim forecast is in particular the results
(a) individual observations;
(b) test drilling;
(c) seismic monitoring and evaluation.
(8) The continuous forecast includes an evaluation of the current development of the seismic activity of the part of the mountain mass concerned, following data on the seismic activity of the entire bearing or pelvis.
Anti-shock prevention means
(1) The choice of means of counter-shock prevention in mining works is based on an evaluation of the geomechical conditions and the results of the forecast. Anti-shock prevention means are divided into active and passive.
(2) Active means of counter-shock prevention are in particular:
(a) appropriate space-time management of mining works;
(b) non-profit-free shredding work in the composition and surrounding rocks (7);
(c) irrigation of the compositions and surrounding rocks;
d) lightening drilling,
(e) the choice of technology in the management and provision of mining works.
(3) The passive means of counter-shock prevention are in particular:
(a) the choice of type and density of the reinforcement of mining works;
(b) stabilisation of weakened parts of mountain mass by injection and anchoring;
(c) the creation of safety cavities or compensation spaces;
(d) causing shock in the absence of people;
(e) cost-cutting work;
(f) reduction of the number of workers in vulnerable areas;
(g) the non-availability of unnecessary mining works;
(h) removal of workers when the danger is detected;
(i) remote control of machines;
(j) how the equipment is located in the mining works;
(k) protection and switching off of electrical equipment.
(4) The use, scope, frequency and combination of active and passive means of shock prevention are established in accordance with the working rules (Section 3 (1)).
Design of mining works
(1) In projects of new mines or floors of existing mines, anti-shock prevention must always be tackled using experience from bearing mining.
(2) The plans for opening, preparing and quarrying must be based on and consistent with the long-term concept of mining activity in the blast mines. The long-term concept of mining activities must be developed on these mines each year, with a view to a minimum of three years. The long-term concept of mining activity takes into account the anti-shock prevention strategy and is presented to the competent district mining authority for the regulation of the necessary measures (9). The concept requires a procedure that does not increase the risk of shocks in the same or other component or part of the mountain mass and does not make it impossible to use means of shock prevention.
(3) Organization2) updates the long-term concept according to changes in local conditions. This update must be submitted to the District Mining Authority for the regulation of the necessary measures (9).
(4) Basic precautions against the risk of shock must be addressed already in the plan for opening, preparing and conquering10) the relevant verse.
Coordination of works
(1) Mining activities in and between conflagration mines must also be coordinated from the point of view of shock prevention.
(2) The two-and-more-down procedure at the frontier of the mining premises (11) must be discussed in advance and agreed by the competitors of these mines (10).
(3) When coordinating work at the frontier of conquest areas, account must be taken of the possibility of using the natural frontier of conquest to reduce the risk of shock.
Anti-shock prevention projects and technological processes
(1) For mining works in the 3rd degree of shock risk, a shock prevention project must be developed. This project includes the inclusion of the mine, the implementation of an ongoing forecast of the occurrence and location of shocks, its frequency and the means used, as well as the use of their results, the use of active and passive means of counter-shock prevention, the characteristics of shock symptoms, the maximum permissible number of employees and the unacceptable coexistence of activities. This project must be recommended by expert judgement.
(2) Part of the technological procedure for mining works in the 1st, 2nd and 3rd stages of the risk of shocks must be the Annex "Special measures against shocks" (12). This Annex shall be processed accordingly under local conditions. For mining works in the 3rd stage of shock hazards, this annex shall be processed in accordance with the shock prevention project.
Lessons of staff
Staff working in the mining works with shock hazards and technical supervision controlling the workplace must be aware of possible signs of shock and, at regular intervals established by the racing mine, trained on the principles of work in the mining works with shock hazards and procedure in case of shock.
Work restrictions
(1) If a concussion is observed, a sign of a concussion or if a concussion occurs, the work must be stopped immediately and the crew removed. The racing mine shall determine the conditions under which work may be resumed.
(2) If the results of the interim shock forecast are unfavourable, only work related to the removal of the unfavourable condition may be carried out.
(3) If a failure is operated (13) in the third stage of the risk of shock,
a) cannot allow the racing mine
1. the conduct of a further failure at the 3rd stage of the risk of shock at a lower ground distance of the fault fronts than the sum of the L values for both failures,
2. the stamping of a long mine in the 3rd stage of the shock hazard at a lower ground-floor distance than L from the edge of the fault front, where no part of the cut-off work classified in the 3rd stage of the shock hazard shall be less than L from the edge of the fault front;
(b) at the time of interference with the mountain mass in the breach, the racing mine may allow only the necessary work in adjacent corridors classified in the 3rd stage of the risk of shocks at a distance less than L from the edge of the fault front.
Mining works management services
(1) Mining works included in the first degree of shock risk may be conducted without the use of active and passive means of shock prevention. However, to the extent set out in the technological procedure, an ongoing forecast of the risk of shock must be carried out. In the event of adverse prognosis results, the mine must be reassigned to the 2nd degree of shock risk and the negative condition removed.
(2) Mining works included in the 2nd degree of shock risk may only be carried out on a continuous basis and in the verified existence of the protection zone. In the event of adverse prognosis results, the adverse situation shall be removed and the existence of a specified protection zone subsequently verified.
(3) Mining works included in the 3rd degree of shock risk may be conducted only in the continuous implementation of the ongoing forecast and use of active means of shock prevention, even in the verified existence of a specified protection zone. In the event of adverse results of the interim forecast, the adverse situation shall be removed.
(4) The effectiveness of the measures taken pursuant to paragraphs 1, 2 and 3 to remedy the unfavourable situation should be verified once they have been implemented.
(5) Infringements should be conducted with a regular procedure in a wide straight line. The spacing between adjacent failures in the common corridor shall be chosen in such a way that they are not adversely affected (up to 10 m or more than L).
(6) The corridors in the pillar in the prefix of failure at a distance of L and smaller from the edge of the fault queue must be made inaccessible. A racing mine may only allow entry into these corridors in specially justified cases.
(7) Contractual reinforcement (14) must be chosen in such a way as to allow for the implementation of the shock prevention measures set out in the counter-shock prevention or technological prevention projects and remain stable even if there is a loss of contact with the sub-surface.
(8) The strength of the long mine division 15) is chosen in accordance with the required load capacity in view of the degree of shock risk and the nature of the expected deformation processes.
(9) The provisions of paragraphs 1 to 8 shall apply mutatis mutandis to excavations of niche, chambers, trafostations, mining plants, etc., to the excavation and disposal of mining works.
Measures for other mining works
In the excavated and used mining works, in particular in the context of the management of other mining works, organisations identify the threat to the mining works of the shock, update their classification and determine the extent of protection against the consequences of the shock and the extent of implementation of the interim forecast.
Requirements for installation of electrical equipment
(1) Electrical cables of low voltage circuits (hereinafter referred to as "circuits") outside non-explosive conclusions contained in mine parts classified in the second or third degree shock hazards, with the exception of spark-safe circuits, non-ignition circuits, telecommunications and communication circuits, igniting circuits, personal lamps and electrical circuits of mine locomotives, shall be monitored by isolation control devices and shall be automatically switched off when the insulating condition falls below 15 ° / V.
(2) Cable distribution (16) over 1 kV in mine parts classified in the 2nd or 3rd degree of shock risk, shall be equipped at the end of the cable beam with a device ensuring their shut-off at a time of not more than 0,2 s
(3) Cable manifolds above 1 kV in mine parts classified in the 2nd or 3rd degree of shock hazard shall be equipped with a device for self-discharging the electrical power at:
(a) shaking; or
(b) exceeding the permitted concentration of methane in the mining air. The shutdown shall take place within 2 seconds of exceeding the set limit value of any sensor placed in the specified components.
The location of sensors and auto-off areas shall determine the racing mine. The organization will mark them in the emergency plan.
(4) Electrical equipment, cable lines and main earth lines, including diverting from it to electrical equipment and fittings, in mine parts classified in 2nd or 3rd degree shock hazards, must be physically checked at least once every six months and every time after shock and shock.
Report and documentation of shocks
(1) Any shake must be verified and reported without delay to the District Mining Office; a check on the condition of mining works must be carried out and the concussion documented. The site and date of the shake shall be marked in the basic mine map.
(2) The organisation shall keep documentation for each shock. The shock documentation shall include a detailed situation sketch of the site of shock with a reasonably broad surrounding area, a description of the accompanying signs and effects of shock, a record of energy released during shock and an evaluation of the development of seismic activity prior to shock, a determination of the probable causes of shock and a place of release of flexible energy and a breach of mountain mass. The organisation shall keep the documentation of the shocks for at least 10 years.
Transitional provisions
(1) Low voltage electrical equipment put into service before the entry into force of this Decree which does not comply with the requirements laid down in Paragraph 15 (1) may only be operated after 1 March 2005 provided that the following conditions are met:
(a) the circuit is supplied from one galvanically separated source,
(b) the voltage of the circuit does not exceed 220 V and the total power consumption of the connected appliances does not exceed 200 VA;
(c) the electrical circuit is made by cable with mechanical damage protection, the total length of which does not exceed 15 m;
(d) the minimum cross-section of each electric cable core is 2,5 mm2;
(e) the electrical circuit is guarded by an apparatus which ensures that the circuit is disconnected from the source in time up to 0,1 s at short circuit;
no later than 31 December 2006.
(2) The requirements of Article 15 (2) and (3) must be fulfilled by 31 December 2007 at the latest.
Repeal
Decree No. 45 / 1995 Coll., on safety and health at work and safety of operations in mines with a risk of mine shocks, is repealed.
Efficacy
This Decree shall take effect on 15 January 2005.
Chairman:
Prof. JUDr. Makarius, CSc.
1) Sections 73 (1) and 2 (1) of Decree No. 22 / 1989 Coll., on safety of health at work and safety of operation in mining and mining activities in underground as amended by Decree No. 3 / 1994 Coll. and Decree No. 330 / 2002 Coll.
2) Article 3a of Act No. 61 / 1988 Coll., on Mining Activities, Explosives and State Mining Administration, as amended.
3) Paragraph 273 (2) of Act No. 65 / 1965 Coll., Labour Code, as amended by Act No. 155 / 2000 Coll.
4) Paragraph 1 (6) of Decree No. 340 / 1992 Coll., on the requirements for qualification and competence and on the verification of the professional competence of workers for mining and mining activities and amending certain regulations issued by the Czech Mining Authority to ensure safety and health at work and safety of operations in mining and mining activities.
5) Paragraph 6 (1) of Act No. 61 / 1988 Coll., as amended by Act No. 542 / 1991 Coll. and Act No. 206 / 2002 Coll.
6) Decree No. 104 / 1988 Coll., on the economical use of exclusive bearings, on the authorisation and reporting of mining activities and reporting of mining activities, as amended.
7) Sections 101 to 107 of Decree No 72 / 1988 Coll., on the use of explosives, as amended by Decree No 173 / 1992 Coll.
8) § 74 of Decree No. 22 / 1989 Coll.
9) Paragraph 41 (1) (c) of Law 61 / 1988. Sb., as amended.
10) Annex 3, point 1.3.1 of Decree No 104 / 1988 Coll.
11) Article 32 (3) of Act No. 44 / 1988 Coll., on the Protection and Use of Mineral Wealth (Mining Act), as amended by Act No. 541 / 1989 Coll.
12) Articles 43 (1) (g) and 59 (1) (j) of Decree No 22 / 1989 Coll.
13) Paragraph 2 (1) (n) of Decree No 22 / 1989 Coll.
14) Paragraph 260 (6) of Decree No. 22 / 1989 Coll., as amended by Decree No. 3 / 1994 Coll.
15) Paragraph 44 of Decree No. 22 / 1989 Coll., as amended by Decree No. 3 / 1994 Coll.
16) § 235 (2) of Decree No 22 / 1989 Coll.
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Regulation Information
| Citation | Decree No. 659 / 2004 Coll., on safety and health at work and safety of operations in mines with the risk of mine shocks |
|---|---|
| Regulation Type | - |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 23.12.2004 |
|---|---|
| Effective from | 15.01.2005 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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