C. 16. Shafts Flashcards
(146 cards)
How shall the winding engine be regarding the MHSA regulations?
- 5 The winding engine shall be such that –
- 5.1 When running at various speeds with light or heavy loads it can be readily slowed and stopped and after being stopped it can be restarted immediately in either direction; and
- 5.2 it can lift from the bottom to the top of the shaft or winze the maximum unbalanced load on one drum. This provision shall not apply where other means exist enabling persons employed below to reach the top of the shaft or winze.
What does the regulations stipulate about the conveyance of persons in shafts and winzes?
- 1 No person shall ride or cause or permit somebody to ride in or on a conveyance operated by a winding plant, unless it is permitted by a prescribed permit or by regulation 16.94
- 2.1 Except as provided for in regulation 16.94, the manager of a mine shall not use a winding plant nor permit a winding plant to be used unless he is in possession of a prescribed permit issued by a Principal Inspector of Mines.
- 2.2 Every application for the use of a winding plant shall be made to the Principal Inspector of Mines on the form obtainable from him.
- 2.3 The Principle Inspector of Mines may grant a permit to use such winding plant subject to conditions as he may specify.
- 2.5 The permit shall be kept at the mine office and a legible copy thereof shall be displayed in a suitable glazed frame in the engine room.
- 2.7 The regional director may direct that any regulation contained in Chapter 17 of these regulations shall apply to an automatic or semi-automatic winding plant by giving written notice to that effect to the manager, with specific reference to the regulation concerned, whereafter such regulation shall apply to such winding plant.
- 3 The Principal Inspector of Mines may carry out specific or periodic tests or inspections of any winding plant.
What does the regulation stipulate about the brake or brakes of a drum type of winding engine?
- 6.2 For drum type of winding engines where the rope is securely attached to the winding drum, the brake or brakes, without the assistance of any counter balancing effect of any load supported by the other drum, shall be capable of holding without slipping a load on the rope at the drum equivalent to the combined mass of-
(a) the conveyance and its attachments;
(b) the maximum permitted mass of mineral, or double the maximum permitted mass of persons, or the maximum permitted mass of material together with double the maximum permitted mass of persons when both material and persons are conveyed simultaneously, whichever is the greatest; and
(c) the mass of rope between the sheave and the conveyance, when the conveyance is at a point in the shaft which produces the maximum static torque on the brakes.
What does the regulation stipulate about the brake or brakes of a friction drive or sheave type winding engine?
- 6.3 For a friction drive or sheave type winding engine where the rope or ropes are not securely attached to the winding drum or winding sheave, the brake or brakes shall be capable of holding without slipping the maximum static out-of-balance load which occurs when one of the conveyances, or where a counterpoise is used the conveyance-
(a) is loaded with the permitted mass of mineral; or
(b) is loaded with double the permitted mass of persons; or
(c) is loaded with double the permitted mass of material together with double the mass of the permitted number of persons with both material and persons are conveyed simultaneously; or
(d) is removed from its bridle.
What do the regulation say about the winding drum?
- 6.4 Every winding drum shall have flanges or horns, and if conical or spiral, such other appliances to prevent the rope from slipping off or coiling unevenly.
- 6.5 Except for friction drive or sheave type of winding engines, there shall not be less than 3 turns of rope upon the drum when the cage, skip or other means of conveyance is at the lowest point in the shaft or winze from which hoisting is effected and the end of the rope where applicable shall be fastened securely round the arm or the shaft of the drum.
- 6.6 For friction drive or sheave type of winding engines where no part of the rope is securely attached to the winding drum or sheave, there shall be no dangerous slipping of the rope on such drum or sheave under any possible working conditions.
- 6.7 Every winding drum at the driver’s right hand side shall have overlay rope; where only one drum is used it shall have overlay rope.
- 6.13 All bolts and other fittings of winding drums, brakes and clutches shall be rendered secure by means of suitable locking devices.
What provisions need to be made for the WED in the design of a winding engine?
- 6.7 Every winding drum at the driver’s right hand side shall have overlay rope; where only one drum is used it shall have overlay rope.
- 6.8 The reversing lever of every steam or air operated winding engine and the control lever of every electrically operated winding engine shall follow the overlay rope in the direction of the movement.
- 6.9 Where a hand-operated brake lever is provided on any winding engine it shall be pulled towards the driver to apply the brakes.
- 6.10 The relief and throttle valve levers of every steam or air operated winding engine shall be in a central position.
- 6.11 The operating mechanism of the clutch of every winding drum shall be provided with a locking arrangement which shall be used to prevent inadvertent withdrawel of the clutch. If the clutch is not clearly visible from the driver’s operating position, means shall be provided to indicate the driver at all times the extent to which the clutch is engaged or disengaged.
- 7 In addition to any marks on the rope, every winding engine shall be provided with reliable depth indicators conveniently situated, which will at all times show clearly and accurately to the winding engine driver at his operating position the position of the cage, skip or other means of conveyance and where a reduction in winding speed is necessary. The pointer of the dial indicator on the driver’s right hand side shall move in a clockwise direction when lowering, and the pointer of a post and spiral indicator shall move up or down as the conveyance moves up or down. On every winding engine where the rope is driven by friction, every single-drum winding engine and every winding engine having 2 drums permanently fixed on one shaft, only one indicator need to be provided.
- 8 Where the length of wind below the uppermost landing place for persons exceeds 100 meters, adequate provision shall be made whereby the winding engine driver is warned of the arrival of the ascending cage, skip or other means of conveyance at a point in the shaft, the distance of which from the uppermost landing place for persons is not less than the equivalent of 3 revolutions of the drum or sheave of the winding engine: Provided that in the case of a single drum winder a similar device shall be fitted to warn the winding-engine driver of the approach of the descending conveyance to the lowest landing place for persons.
- 9.2.2 The device or combination of devices contemplated in regulation 16.9.2.1 must on detecting a slack rope condition either automatically halt all winding operations in the vertical shaft safely or warn all winding engine drivers in such shaft of the slack rope condition.
- 10 Any winding engine with a permitted speed of over five metres per second shall be fitted with a speed indicator and a tachograph, which shall be used and maintained in efficient working order. The speed indicator shall be so situated that the winding speed can be easily read at all times by the winding-engine driver from his operating position.
What does the regulation stipulate about the clutch of a winding drum?
- 6.11 The operating mechanism of the clutch of every winding drum shall be provided with a locking arrangement which shall be used to prevent inadvertent withdrawel of the clutch. If the clutch is not clearly visible from the driver’s operating position, means shall be provided to indicate the driver at all times the extent to which the clutch is engaged or disengaged.
- 6.12 It shall be impossible to unclutch any winding drum unless the brake or brakes of such drum are fully applied and it shall be impossible to release the brake or brakes of such drum until the clutch is fully engaged and securely locked.
What prevention devices need to be fitted to a winding engine?
16.9 Every winding engine shall be fitted with at least one effective automatic overwind prevention device as well as an effective automatic overspeed prevention device.
Complete the sentence:
16.6.6 For friction drive or sheave type of winding engines where no part of the rope is securely attached to the winding drum or sheave, there shall be
no dangerous slipping of the rope on such drum or sheave under any possible working conditions.
What does the law stipulate regarding slack rope on a winding plant?
- 9.2.1 The employer must install a device or combination of devices that detect slack rope on every winding plant in which the rope is attached to the drum operating in a vertical shaft, excluding a shaft in the course of being sunk.
- 9.2.2 The device or combination of devices contemplated in regulation 16.9.2.1 must on detecting a slack rope condition either automatically halt all winding operations in the vertical shaft safely or warn all winding engine drivers in such shaft of the slack rope condition.
- 9.2.3 The employer must establish an effective and safe procedure for rectifying any slack rope conditions.
- 9.2.4 All winding operations in the vertical shaft must cease when a slack rope condition occurs, except such operations necessary for rectifying the slack rope condition authorised by the engineer or person appointed in terms of regulation 2.13.2.
- 9.2.5 No winding operations may resume, except operations permissible in terms of regulation 16.9.2.4, until the slack rope condition has been rectified.
When and what device or combination of devices need the employer installed on a winding plant?
16.9.2.1 The employer must install a device or combination of devices that detect slack rope on every winding plant in which the rope is attached to the drum operating in a vertical shaft, excluding a shaft in the course of being sunk.
Fill in the missing words:
16.7 In addition to any marks on the rope, every winding engine shall be provided with reliable ________________ conveniently situated, which will at all times show clearly and accurately to the winding engine driver at his operating position the position of the ______, _________ or _______________ and where a reduction in winding speed is necessary. The pointer of the dial indicator on the driver’s right hand side shall move in a _________ direction when lowering, and the pointer of a _______ and ________ shall move up or down as the conveyance moves up or down. On every winding engine where the rope is driven by friction, every single-drum winding engine and every winding engine having 2 drums permanently fixed on one shaft, only ________ indicator need to be provided.
depth indicators cage, skip other means conveyance clockwise post spiral indicator one
With what shall any winding engine be fitted if permitted to wind over five metres per second?
shall be fitted with a speed indicator and a tachograph, which shall be used and maintained in efficient working order. The speed indicator shall be so situated that the winding speed can be easily read at all times by the winding-engine driver from his operating position.
What does the regulation say about the construction of winding plant conveyances?
- 11 Every cage used for the regular conveyance of persons shall be of substantial construction and shall be provided with a proper roof or cover and doors. The cage shall be enclosed in such a manner as to prevent any portion of the body of any person therein from accidentally coming into contact with the timbering or other equipment in the shaft or winze or the sides of the shaft or winze. The doors shall be securely attached to the cage and so arranged that they cannot be opened outwards or accidentally. Provision shall be made for adequate ventilation through the cage.
- 12 Every skip or kibble, used for the regular conveyance of persons in a vertical or steeply inclined shaft or winze shall be provided with a substantial roof or cover that will safeguard the occupants.
- 13 Every conveyance used for examining, repairing or doing other work in a vertical or steeply inclined shaft or winze shall be provided with a substantial roof or cover and shall be sufficiently enclosed to protect any person from accidentally falling out.
- 14 Where the roof or cover of a cage, skip or any other means of conveyance is used as a platform for persons engaged in examining, repairing or doing other work in a vertical or steeply inclined shaft or winze, the persons so engaged shall be protected by a hood or cover immediately above them. Such hood or cover shall be removed as soon as this work is completed.
- 15 No trailer-
(a) shall be used in a shaft or winze where persons are regularly conveyed;
(b) shall be attached to a conveyance when such conveyance is used for the transportation of persons; and
(c) shall be used for the regular transport of persons;Unless it is allowed by the permit referred to in section 33(1) of the Act: Provided that for the purpose of this regulation, “trailer” shall mean any conveyance operated by a winding engine and which is attached to but not forming an integral part of the permanent conveyance, and of which the lateral movement is restrained by means of guide shoes or wheels running in or on guides or tracks.
When may a “trailer” not be used in a shaft or winze?
- 15 No trailer-
(a) shall be used in a shaft or winze where persons are regularly conveyed;
(b) shall be attached to a conveyance when such conveyance is used for the transportation of persons; and
(c) shall be used for the regular transport of persons;Unless it is allowed by the permit referred to in section 33(1) of the Act
What does the regulation say about the construction of a cage used for the regular conveyance of persons?
16.11 Every cage used for the regular conveyance of persons shall be of substantial construction and shall be provided with a proper roof or cover and doors. The cage shall be enclosed in such a manner as to prevent any portion of the body of any person therein from accidentally coming into contact with the timbering or other equipment in the shaft or winze or the sides of the shaft or winze. The doors shall be securely attached to the cage and so arranged that they cannot be opened outwards or accidentally. Provision shall be made for adequate ventilation through the cage.
16.14 Where the roof or cover of a cage, skip or any other means of conveyance is used as a platform for persons engaged in examining, repairing or doing other work in a vertical or steeply inclined shaft or winze, the persons so engaged shall be protected by a hood or cover immediately above them. When shall such a hood or cover be removed?
Such hood or cover shall be removed as soon as this work is completed.
What is the definition of a “trailer”?
“trailer” shall mean any conveyance operated by a winding engine and which is attached to but not forming an integral part of the permanent conveyance, and of which the lateral movement is restrained by means of guide shoes or wheels running in or on guides or tracks.
Complete the sentence?
16.12 Every skip or kibble, used for the regular conveyance of persons in a vertical or steeply inclined shaft or winze shall be provided with a ____
substantial roof or cover that will safeguard the occupants.
Complete the sentence:
16.13 Every conveyance used for examining, repairing or doing other work in a vertical or steeply inclined shaft or winze shall be provided with a
substantial roof or cover and shall be sufficiently enclosed to protect any person from accidentally falling out.
What does the regulation require regarding the connections to winding plant conveyances?
- 16 No rope, bar, link, chain or other connection shall be used for winding purposes unless it is of good quality and manufacture, free from any visible defect and of adequate calculated strength.
- 17 The connection between-
(a) any winding rope and the cage, skip, bucket, kibble, other means of conveyance or counterpoise;
(b) any balance rope or tail rope and the conveyance or counterpoise; and
(c) any connecting rope and the conveyance and any trailer or other attached conveyanceshall be such that no accidental disconnection can take place.
- 18 At intervals of not more than 6 months the connections between-
(a) any winding rope and the conveyance or counterpoise;
(b) the conveyance and any trailer or other attached conveyance; and
(c) any balance rope or tail rope and the conveyance or counterpoise, shall be annealed or given other proper heat treatment or shall be discarded and replaced. With connections of a class of steel approved by the Chief Inspector, the interval for heat treatment may be extended with the written permission of the Chief Inspector. - 19 A proper record shall be kept of the heat treatment and working life of the connections referred to in regulation 16.18 and an engineer shall add to the record the report on the method procedure followed in such treatment and his comments on the results. All such connections and their component parts shall be marked clearly for the purpose of identification.
Where can accidental disconnection take place on a winder plant conveyance?
- 17 The connection between-
(a) any winding rope and the cage, skip, bucket, kibble, other means of conveyance or counterpoise;
(b) any balance rope or tail rope and the conveyance or counterpoise; and
(c) any connecting rope and the conveyance and any trailer or other attached conveyanceshall be such that no accidental disconnection can take place.
What needs to be checked on the connections of a conveyance at intervals of not more than 6 months?
- 18 At intervals of not more than 6 months the connections between-
(a) any winding rope and the conveyance or counterpoise;
(b) the conveyance and any trailer or other attached conveyance; and
(c) any balance rope or tail rope and the conveyance or counterpoise, shall be annealed or given other proper heat treatment or shall be discarded and replaced. With connections of a class of steel approved by the Chief Inspector, the interval for heat treatment may be extended with the written permission of the Chief Inspector. - 19 A proper record shall be kept of the heat treatment and working life of the connections referred to in regulation 16.18 and an engineer shall add to the record the report on the method procedure followed in such treatment and his comments on the results. All such connections and their component parts shall be marked clearly for the purpose of identification.
What does the regulations stipulate about winding ropes?
- 20.1 Any winding rope must be manufactured by a manufacturer accredited in terms of ISO 9001: “Quality systems-Model for quality assurance in design, development, production, installation and servicing”.
- 20.2 The diameter and construction of the winding rope must be suited to the diameter of the sheaves and drums forming part of the winding plant.
- 21 A winding rope which has been joined or reinforced in any manner may not be used as part of a winding plant without the written permission of the Principal Inspector of Mines.
- 23.1 Any winding rope, balance rope or guide rope which as previously been in use may not be re-used unless the breaking strength of specimen cut from the end of such rope has been determined by a destructive test at an approved rope testing station to comply with these regulations.
- 23.2 Any winding rope, balance rope or guide rope which as previously been in use may not be re-used unless the engineer is in possession of the documented history of the working life of the rope.
- 24 For every winding plant in use there must be in reserve and ready for use at all times a spare winding rope that complies with these regulations. One such spare rope may be kept in reserve for more than one winding plant if that rope is suitable for use on such other winding plants.
- 25 No winding rope, balance rope or guide rope may be installed unless the manager is in possession of a certificate not older than two years confirming that the breaking strength, as determined by a destructive test at an approved rope testing station, complies with these regulations.
- 27.1 Any newly installed winding rope, balance rope or guide rope and the rope connections of any such rope must be carefully examined by the engineer and may not be used for the raising or lowering of persons until the conveyance loaded with the maximum permitted mass has been run two complete test trips between the highest and lowest stopping places ordinarily in use.
- 27.2 The engineer, in addition to recording the results in terms of regulation 16.79, must record and sign the results of the examination in terms of regulation 16.27.1 immediately in the Driver’s Log Book provided in terms of regulation 16.81.
- 28.1 When any winding rope, balance rope or guide rope is installed, the particulars specified in paragraphs (a) and (b) of regulation 16.79.2 must be submitted to the Principle Inspector of Mines.
- 28.2 When any winding rope in use is replaced, the reasons for discard, the life in terms of winding cycles, the time in use and such other particulars regarding that winding rope as the Principal Inspector of Mines may require must be submitted to the Principal Inspector of Mines.