Order of the Czech Mining Office No. 45 / 1995 Coll.
Decree of the Czech Mining Authority on safety and health at work and safety of operations in mines with the risk of mining shocks
Valid
Effective from 14.03.1995
45
DECLARATION
Czech Mining Office
of 9 February 1995
on safety and health at work and safety at mines with the risk of mine shocks
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 and criteria for the inclusion of mines
(1) This decree applies to mines with the risk of mine shocks.
(2) Mine-shock mines include mines where the mine-shock has occurred or which may be threatened by the mine-shock. 1)
Interpretation of terms
For the purposes of this decree, they shall be considered as:
(a) shock phenomena - natural phenomena of sudden violations of mountain massif, in which manifestations occur in mining works without their deformation or with their apparent or measurable deformation. Shaking or cracking operations, shocks, shocks, pillar or detonation wounds and mine shocks are regarded as shock phenomena.
1. shedding or cracking - shock phenomena which are manifested by the shedding of tiny rock fragments from the circumference of the mine work or sound characteristic bursting or both. The mine is clearly not distorted,
2. shocks, shock, pillar or detonation wounds - shock phenomena audible, in which the apparent deformation of mining works does not occur or is negligible, but are measurable. These may involve local coal or rock sales,
3. mine tremors (hereinafter referred to as "tremors") - shock phenomena involving the casting or casting of rocks into the mine work and its apparent, permanent deformation,
(b) counter-shock prevention - a system of activities and measures to identify the risk of shock, prevent or reduce its consequences;
(c) part of mountain massif - vertically and horizontally delimited area in the housing area with similar natural characteristics;
(d) 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 prognosis of shock is divided into regional and local
1. regional shock forecast - action to determine the susceptibility of parts of mountain massif to shock on the basis of the assessment of natural and mining conditions and the occurrence of shock events;
2. local forecast of shock - a summary of activities to determine the degree of risk of shock in mining works and the effectiveness of active means of shock prevention;
(e) active means of shock prevention - a summary of activities, measures and equipment to reduce the risk of shock,
(f) passive means of shock prevention - a summary of activities, measures and devices to reduce the effects of shocks,
(g) protected area - an area where the stress in the mountain massif does not reach the values which may cause a mining shock when conducting mining works;
(h) a protective slot (part of the bearing) - a sole, a gangway or a part of the bearing, the achievement of which in an appropriate space and time allows to lead in another gangway or in another gangway of the same gangway, or parts of the bearing of the mining work in a protected area;
(i) the protection zone - an area in the compound adjacent to a mine in which the compound is naturally or artificially damaged so that it is unable to conserve flexible energy and creates a dampening layer when releasing flexible energy in order beyond that zone;
(j) additional voltage - the voltage in the mountain mass which is higher than the original voltage in it,
(k) the retained pillar - an unconquered part of the mountain mass affected by mining works in which additional mountain tensions other than those corresponding to geostatic pressure may be concentrated;
(l) signs of shocks - observable or measurable phenomena, which, based on previous experience in the management of mining works in a certain part of the mountain mass, are known to prevent the occurrence of shocks (e.g. shock phenomena in a particular mine work or characteristic development of seismic activity).
Management of shock prevention
(1) An anti-shock prevention must be ensured in the organisation (2) or part thereof (the organisation).
(2) Only employees with higher education in the relevant Directive3) with at least three years of mining practice, as far as possible in earthquakes.
(3) Activities leading to the prevention of shock conditions, clarification of the causes of shock manifestations and provision should be made for measures to improve the safety of workers and operations (counter-shock regime) in earthquakes.
_
Classification of parts of mountain mass
(1) All parts of the mountain mass shall be considered as hazardous shocks in the earthquakes, unless otherwise specified in this Regulation.
(2) Based on the results of the forecast, parts of the mountain mass may be defined where there is no risk of shock.
Classification of mining works
(1) All mining works, except those carried out in parts of the mountain massif where there is no risk of shaking (§ 4 (2)), shall include the organisation (4) in the 1st, 2nd or 3rd stages of the risk of shaking.
(2) Mining works at the first stage of the risk of shocks are classified as mining works where, in normal ways, their management without the use of active and passive means of shock prevention is not expected to cause shocks.
(3) Works of mine in the 2nd degree of shock hazard shall be classified as such, for which, in the normal course of their management, the risk of shock cannot be excluded. In the event of an unfavourable outcome of the local forecast carried out in the course of the management of mining works at stage 2 of the risk of shocks, the active and passive means of shock prevention must be used.
(4) Mining works at the 3rd stage of the risk of shocks are to be classified as such works which, when conducting them, are likely to cause shocks or are already exposed to shocks. When conducting mining works in the 3rd degree of shock risk, active and passive means of shock prevention must always be used.
Impact prognosis
(1) The organisation is required to ascertain in sufficient time the data required for the forecast.
(2) Seismic activity in the mining area of the mine should be monitored and evaluated using the results of the seismic activity of the entire bearing or pelvis.
(3) The regional forecast is the basis for defining parts of the mountain mass where there is a risk or risk of shock. The elements of the regional forecast are in particular:
(a) the lithological nature of the stratum sequence;
(b) structural and paleonatal analysis of the mass;
(c) analysis of changes in powers and evolution of composition,
(d) the existence of abnormal phenomena in the development of the layers;
(e) the physical-mechanical characteristics of the rock mass or parts thereof;
(f) depth of deposition below the surface and its changes;
(g) the sensitivity of the compound to the expression of shocks.
(4) The local forecast shall be based on a regional forecast and shall be the basis for the inclusion or reassignment of mining works, for the determination of the sites in the mining works where the impact can be expected and for the control of the effectiveness of the shock measures.
(5) The method of implementation of the forecast is laid down in a plan for opening, preparing and capturing; (5) the location of the local forecast, its frequency, its means and the use of their results will specify the technological process.
Anti-shock prevention means
(1) Active and passive means of counter-shock prevention shall be applied in the conduct of mining work, with the exception of those referred to in Paragraph 13 (1), to reduce the risk of shocks and to limit their consequences. It is necessary to select a procedure that does not increase the risk of shocks in other components or in another part of the mountain mass and does not make it impossible to predict and use means of shock prevention.
(2) Active means are used in the management of mining works on the basis of forecast results. Active means include in particular:
(a) space-time management of mining works;
b) Shredding works in surrounding rocks and compositions, 6)
(c) irrigation of the compositions and surrounding rocks;
(d) relief wells;
(e) the choice of mining works management technology;
if they are directed towards preventing shock.
(3) Passive means to limit the effects of any shock must be implemented in the management of mining works for the protection of workers and equipment. The passive means are in particular:
(a) reduction in the number of workers in vulnerable areas;
(b) staff recall systems for the detection of hazards;
(c) the non-availability of unnecessary mining works;
(d) choice of reinforcement of mining works;
(e) the location of the equipment in the mining works,
(f) remote control of machinery;
(g) the creation of safety cavities or compensation spaces;
h) causing shocks in the absence of people;
(i) protection and switching off of electrical equipment.
(4) The use and combination of active and passive means provide for a technological approach according to the results of the forecast.
PRINCIPLES OF PROJECTING AND LEADING WORK
Design of mining works
(1) In projects of new mines and floors, it is always necessary to address the concept of shock prevention so that the current and predicted state of the bearing or part of it can be determined in terms of the risk of shock formation, using the experience of conquest of this bearing on neighbouring mines.
(2) Plans for opening, preparing and quarrying must be based and consistent with the long-term concept of mining activity in mines with the risk of mine shocks. 7) The long-term concept of mining activities must be developed at these mines for at least five years, taking into account the anti-shock prevention strategy and be confirmed by the district mining office. The requirement to process a long-term concept is fulfilled when the plan of opening, preparing and capturing is processed for at least five years and takes into account the anti-shock prevention strategy.
(3) Organization4) updates the long-term concept according to local changes but at least once a year.
(4) Basic precautions against shock hazards must be addressed according to a special regulation (8) already in the plan for opening, preparing and conquering. In doing so, account must be taken of the possible influence of the retained pillars in the above-mentioned compositions or compositions for which the plan of opening, preparation and conquest is processed.
Coordination of works
(1) Mining activities in or between confluence mines must also be coordinated in terms of shock protection.
(2) The two-mine work at the border of the conquest areas, if they could have an adverse effect on each other in terms of shock, must be discussed in advance between the two mines. 8)
(3) Coordination of works referred to in paragraphs 1 and 2 is proposed by the Organisation.4), 8)
(4) When coordinating work on 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.
Technology procedures
(1) Part of the technological process for mining works in mountain massif or parts thereof with a risk of shock must include the annex "Special measures against shocks - a project." 9)
(2) Specific measures against shocks are laid down in accordance with local conditions. It includes the inclusion of the mine, the implementation of the shock forecast and its location, frequency and means, as well as the use of their results, the use of active and passive means of shock prevention and the characteristics of shock symptoms.
(3) The technological procedure also provides for the maximum permissible number of employees and determines the permissible coexistence of activities.
OTHER MEASURES FOR THE MANAGEMENT OF WORK
Lessons of staff
The workers in the mining works with shock hazards and technical supervision controlling the workplace must be aware, before entering these mining works, of the possible signs of shock and regularly trained on the principles of work in the mining works with shock hazards.
Work restrictions
(1) If signs of a concussion are observed or if there is evidence of a concussion, the work must be stopped immediately and the crew removed. Organization4) determines the conditions under which work may be restarted.
(2) If the results of the local forecast carried out in the management of mining works are unfavourable, only work related to the counter-shock prevention mentioned in the technological process may be carried out.
(3) If a fault or a quarry is operated 10) at the 3rd degree of shock hazard, the organisation may 4) authorise the conduct of mining works at the 2nd and 3rd stages of shock risk at a distance of less than 200 m from the edge of the fault queue only on the basis of an expert opinion which eliminates the assumption of the risk of shock in the conduct of such mining works. Specific safety measures need to be laid down when such mining activities are carried out which are not related to their management.
(4) Paragraph 3 shall not apply to work related to the operation of such a failure or charge.
(5) If it can be assumed that there is no regular release of the voltage in the overlay of the failure or the charge, the provisions of paragraph 3 shall apply at a distance of 200 metres from the outline of the cut-off area.
Mining works management services
(1) Mining works included in the first degree of danger may be conducted without the use of active and passive means of shock prevention. However, to the extent set out in the technological process, a local forecast of the risk of shocks must be carried out. If such a hazard has been identified, the mining work in this area must be reclassified in accordance with § 5 and only carried out in compliance with the measures laid down for the 2nd or 3rd degree of danger.
(2) Mining works included in the 2nd degree of shock risk may be conducted only in the continuous implementation of the forecast; if they are to have a protection zone created, then only if these are ensured.
(3) Mining works included in the 3rd degree of shock risk may be conducted only in the continuous implementation of the forecast and use of active means of shock prevention, even if the protection zone, if required, has been secured.
(4) The effectiveness of active anti-shock prevention devices should be verified after implementation.
Management of long mining works
(1) In long mining works and breaks in the compositions, a forecast is to be made and, when established by a technological procedure, to provide the necessary protection zone in the face, in the sides of the mine and within the necessary distance behind the forehead.
(2) The strength of the long mining works (11) should be chosen in accordance with the required load capacity, taking into account the degree of risk of shock, the anti-shock measures laid down, the nature of the expected deformation processes, the characteristics and construction of the reinforcement.
(3) The provisions of paragraph 1 shall also apply to the stamping of other mining works, such as niche, chambers, transformers and mining plants.
Failure management
(1) If a protection zone is established by a technological procedure, it may only be smoked if it is created in the failure prefix.
(2) Infringements should be conducted in a wide straight line. The spacing between the adjacent failures next to each other in the common corridor shall be chosen in such a way that they are not adversely affected by each other.
(3) Prior to the approach of the failure to the corridors in the pillar in its forefront at the distance of the impact of additional voltage from the edge of the fault queue, these corridors shall be inaccessible. In particular justified cases where such corridors cannot be made accessible for operational reasons, they shall be secured in a manner specified by the technological procedure. Entry into these corridors must be limited to the necessary level.
(4) The choice of malfunctioning reinforcement must allow for the implementation of the anti-shock prevention measures provided for in the technological procedures and be stable even if its contact with the sub-set is lost. 12)
Measures for other mining works
(1) In the already excavated and used mining works, particularly in the context of the management of other mining works, the threat to these works must be identified. The scope of protection against shock consequences and the implementation interval of the forecast shall be determined by a technological procedure.
(2) When disposing of mining works, it is necessary to follow the provisions for long mining works, breaks and other mining works by analogy.
Requirements for electrical equipment
(1) Cable wiring up to 1000 In non-explosive conclusions leading to rooms with shock hazards, except for spark-safe distribution, telecommunications and communication circuits, ignitative line circuits, personal lamps and electrical circuits of mining locomotives, shall be monitored by isolation control devices and, if the insulation condition falls below 50 ohms / 1 It's off-line.
(2) Cable manifolds over 1000 In mining works classified in accordance with § 5 and classified in areas with an increased risk of methane explosion (SNM 2) or an increased risk of coal dust explosion (SNP 2) 13, it shall be equipped with a device that ensures shut down by natural connections.
(3) The way in which electricity is switched off to an area at risk of shock must be addressed in the deep-mine emergency plan.
Report and documentation of shocks
(1) Each shake must be reported to the competent district mining office. Other shock events must also be reported if they have been injured.
(2) The documentation carried out under the special Regulation (14) must contain a detailed situation sketch of the site of shock with a reasonably wide surrounding area, depending on the condition at the time of shock, a brief record of the course of shock and its consequences.
(3) Other shock phenomena are documented in a manner specified by the organisation.4)
(4) The data needed for counter-shock prevention shall be drawn on the intersection of the mine maps (bands of effect of the protective compound, left pillars in the overhead, tectonic zones).
FINAL PROVISIONS
Exceptions
(1) Only in cases where there is a risk of delay in the rescue of life or of human health or in the liquidation of a serious traffic accident (accident), the organisation may derogate from the provisions of this Decree.
(2) Except in the cases referred to in paragraph 1, the organisation may derogate from the provisions of Sections 3 (2), 12 (3) and (5), 13 (2) and (3), 14 (3), 15 (2) and 17 (1) and (2) 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 organisation4), supported by the necessary replacement measures.
Repeal
The decree of the Czech Mining Office No. 37 / 1991 Coll., on safety and health at work and safety of operations in mines with the danger of mining shocks (No. 2 / 1991 Ú. v. CR) is hereby repealed.
Efficacy
This Decree shall take effect on the date of its publication, except for Paragraph 17 (1), which shall take effect on 1 January 1996.
Chairman:
Ing. Bartoš v. r.
1) § 73 paragraphs 1 and 2 of the Order of the Czech Mining Authority No. 22 / 1989 Coll., on safety and health at work and safety of operation in mining and mining activities in underground.
2) § 3a of the ČNR Act No. 61 / 1988 Coll., on Mining Activities, Explosives and State Mining Administration, as amended by the ČNR Act No. 542 / 1991 Coll.
3) Paragraph 1 (12) of the Order of the Czech Mining Authority No. 340 / 1992 Coll., on 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.
4) Article 6 (1) of Act No. 61 / 1988 Coll.
5) Decree of the Czech Mining Office No. 104 / 1988 Coll., on the rational use of exclusive bearings, on the authorisation and reporting of mining activities and reporting of mining activities, as amended by the Order of the Czech Mining Office No. 242 / 1993 Coll.
6) § 101 to 107 of the Order of the Czech Mining Office No. 72 / 1988 Coll., on Explosives, as amended by the Order of the Czech Mining Office No. 173 / 1992 Coll.
7) § 74 of Decree No. 22 / 1989 Coll. Annex No 3, point 1.3.1 of Decree No 104 / 1988 Coll., as amended by Decree No 242 / 1993 Coll.
8) Paragraph 32 (3) of Act No. 44 / 1988 Coll., on the Protection and Use of Mineral Wealth (Mining Act), as amended by Act No. 541 / 1991 Coll.
9) § 5, § 43 (1) (g), § 59 (1) (j) of Decree No 22 / 1989 Coll.
10) Paragraph 2 (1) (y) of Decree No 22 / 1989 Coll.
11) § 44 of Decree No. 22 / 1989 Coll.
12) Paragraph 260 (6) of Decree No. 22 / 1989 Coll., as amended by Decree No. 3 / 1994 Coll.
13) Sections 232 (1) (c) and 233 (1) (c) of Decree No 22 / 1989 Coll.
14) § 75 of Decree No. 22 / 1989 Coll.
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Regulation Information
| Citation | Decree of the Czech Mining Office No. 45 / 1995 Coll., on safety and health at work and safety of operations in mines with the danger of mining shocks |
|---|---|
| Regulation Type | - |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 14.03.1995 |
|---|---|
| Effective from | 14.03.1995 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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