EP0250286B1 - Procédé d'exploitation de mines ou carrières souterraines par enlevures descendantes et foudroyage et installation pour sa mise en oeuvre - Google Patents

Procédé d'exploitation de mines ou carrières souterraines par enlevures descendantes et foudroyage et installation pour sa mise en oeuvre Download PDF

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Publication number
EP0250286B1
EP0250286B1 EP87401218A EP87401218A EP0250286B1 EP 0250286 B1 EP0250286 B1 EP 0250286B1 EP 87401218 A EP87401218 A EP 87401218A EP 87401218 A EP87401218 A EP 87401218A EP 0250286 B1 EP0250286 B1 EP 0250286B1
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EP
European Patent Office
Prior art keywords
roof
slabs
roof slabs
installation according
ore
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP87401218A
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German (de)
English (en)
French (fr)
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EP0250286A1 (fr
Inventor
René André Marion
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Charbonnages de France CDF
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Charbonnages de France CDF
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Priority to AU74226/87A priority Critical patent/AU582499B2/en
Priority to PT85112A priority patent/PT85112B/pt
Publication of EP0250286A1 publication Critical patent/EP0250286A1/fr
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C41/00—Methods of underground or surface mining; Layouts therefor
    • E21C41/16—Methods of underground mining; Layouts therefor
    • E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers

Definitions

  • the invention relates to a new method of operating underground mines or quarries and a device for its implementation. It applies more particularly to heaps or ore veins of significant height.
  • the farms have a rising or falling slaughter front. With falling edges, slaughter conditions are easier while rising edges can pose safety concerns due to felling on the roof.
  • slaughter with backfilling is given by the document FR-1.313.646, which describes a method of slaughter in a vein, in a platorium deposit. or by erecting, by means of slaughtering devices and a movable wall of embankments which follows slaughtering under the action for example of traction winches.
  • the working face has an inclination of about 45 ° and the felling is done in the direction of the upper end by letting the ore descend by gravity.
  • the present invention aims to solve this problem by proposing, for heaps or ore seams of considerable height, a method of operating with a falling edge with caving, which is relatively simple and inexpensive, and which allows the felling and recovery full ore with great security.
  • this ceiling being substantially horizontal, it is divided into a plurality of ceiling zones supported independently of one another by a plurality of independent slabs juxtaposed side by side and supported by support means, so as to jointly form a protective roof against caving scree, and, as and when ore is extracted under this ceiling, we lightning strikes each of these zones step by step over a limited height by successively lowering each of the slabs from which ore has already been extracted, using for this purpose mechanical means of temporary support and lowering fixed on at least one removable chassis used successively for the different slabs.
  • the zones envisaged here are the portions of the vault individually supported by the aforementioned slabs (the latter are sized so that they can be lowered). It will be appreciated that the invention proposes to work under a blasted area, overcoming the prejudice of those skilled in the art as to what, a priori, safety standards allow.
  • the slabs are supported on walls or pillars of ore and the ore is extracted, alternately, between the walls or pillars and at the top thereof (while supporting artificially these slabs).
  • the slabs rest on artificial pillars and the ore is extracted alternately, between these pillars and under them.
  • These artificial pillars are in practice linked to the slabs; they are advantageously movable transversely to the operating direction.
  • slabs are placed end to end or side by side.
  • the tiles are preferably aligned in rows and rows; the progression of slabs removal and lowering is preferably carried out either row by row or row by row.
  • the spacing of the walls or pillars is, at least in certain places, greater than the width of operating machines so as to allow circulation.
  • the slabs are placed in lateral support against the wall, for example by bracing, which makes it possible to extract the ore on the ground over the entire width of the gallery .
  • the invention also proposes, for the implementation of the aforementioned method, a support installation for the exploitation of underground mines and quarries by descending descents under a ceiling, characterized in that it comprises a roof for protection against substantially horizontal caving-in scree formed of a plurality of independent elementary slabs juxtaposed side by side, provided with support means, as well as mechanical means of support and lowering at a controllable height, adapted to the individual lowering step by step of these slabs, these means for supporting and lowering slabs being fixed on one or more removable frames which are used successively for the different slabs
  • the support means are pillars or walls made of ore to be exploited when the latter has sufficient strength.
  • the support means are artificial. These are fixed pillars integral with the slabs, or linked to the slabs with the possibility of translation along the latter. These pillars are in practice, like slabs, in reinforced concrete.
  • slabs can also be supported by a plurality of horizontal jacks bearing at their ends laterally against a vertical shoulder of the slabs and the walls themselves; these cylinders remain in practice in place while ore is extracted across their entire width.
  • the slabs can also be formed from at least two articulated arch elements forming a variable angle arch, braced at the heels, advantageously supplemented by two lateral or extreme elements, articulated to the vault elements, and intended to go along the walls.
  • Horizontal cylinders are provided for laterally pressing the end elements against the wall.
  • Spaces are maintained between the slabs as well as between the slabs and the side walls of the exploited cavity, so that the descent of each slab is carried out with ease. Devices prevent scree from passing through these spaces.
  • a flexible wire mesh is advantageously interposed between the roof formed by all of the slabs and the vault of caving scree which it supports.
  • shields supported by deformable triangles are arranged in interstices between adjacent slabs; preferably for a given gap between two slabs, the shield is carried by that of the slabs which is intended to be lowered first while the other carries a redent intended to press down on this shield when lowering this another slab.
  • this plurality of elementary slabs comprises at least one alignment (row) whose support means are sufficiently spaced to allow the passage of operating machines.
  • the support and controlled lowering means preferably comprise hydraulic cylinders or cushions which act advantageously on the slabs by means of distribution plates, or on the pillars by means of fittings with which they are fitted.
  • the support and lowering means act on the extreme elements, for example by means of transverse rails coming under horizontal spans of these elements.
  • the thickness of the slabs and the geometry of the pillars are calculated so that the assembly can support the mass of the caving scree.
  • Sensors are advantageously provided, either on the slabs (deflection measurement) or between slabs and pillars (pressure sensors) to enable the load supported by the slabs to be monitored so as to verify that it remains below the limits of use of slabs.
  • Figures 1 to 26 show various alternative embodiments of a support installation for the exploitation of ore (coal, metallic ores ...) by descending removals and with progressive, controlled and localized caving.
  • the extraction can be done by a classic technique (cutting, planing, shooting ...), the felling front progressing from one slab to another.
  • the clearance height is an important parameter but the operator is completely in control of it as long as he has an appropriate slaughtering machine.
  • Figures 1 and 2 show an operating site according to the invention in which a plurality of tiles D1 ... are arranged side by side. It is a narrow site and the slabs, generally parallelepiped, are arranged transversely.
  • two vertical galleries 11 and 12 intended for the air intake and the personnel access, on the one hand, and the ore removal and the air return, on the other hand .
  • These slabs jointly support a mass 13 consisting of caving scree; between these slabs and the caving scree is interposed a flexible metallic trellis 14 which is fixed to the neighboring grounds 15 (called wall) by anchor bolts 16.
  • FIGS 3 and 4 schematically illustrate an intermediate stage of operation in which a central cutout 1, between two pillars P, has already been extracted over the entire length of the site (variant not shown, this cutout 1 is extracted so discontinuous, slab by slab, alternating with side cuts 2).
  • the lateral removals, under the P pillars, are extracted, slab by slab, each slab being lowered from the step of removal, as and when, with controlled and localized caving.
  • the lateral cuts 2 which have been extracted under the pillars of the slabs up to Dp-1, are being extracted under the pillars of the slab Dp.
  • a support device (not shown), preferably hydraulic, maintains the slab Dp during this extraction. The device then ensures the descent of the slab Dp and of the pillars P which are integral with it at the level of the preceding slabs.
  • the pillars P ⁇ are brought as close together as possible; we first extract the side cuts 1 over the entire length of the site.
  • the pillars can be brought back to close configuration beforehand and repeat the above operations.
  • the process is carried out in reverse, starting by extracting the central removal 1 ⁇ (FIG. 5C) then, after bringing the pillars together and lowering the slab, extracting the lateral removals 2 ⁇ (FIG. 5D).
  • FIGS. 6A and 6B illustrate an operating variant in which a central cutout is extracted first as before.
  • Each slab is here equipped with support and lowering devices 17.
  • the extraction of the lateral removals (for reasons of clarity, the "front" pillars of the slabs have been removed) is underway under the pillars of slab D4 which, like the previous slab D3 is supported on its supports 17.
  • the slab D3 Before starting to extract the ore under the pillars of slab D5, ( Figure 6C), while this slab on its support and lowering means 17, the slab D3 is lowered by causing a caving above it (FIG. 6D). There is thus a gap of a slab between the last lowered slab and the slab under which ore is extracted. This can facilitate extraction maneuvers by increasing the space available.
  • Figure 7 shows side by side three rows of tiles Dp, 1, Dp, 2, Dp, 3 surmounted by the same protective trellis.
  • FIG. 8 presents, seen from above, four rows of tiles Dp, 1 to Dp, 4, defining a succession of rows of 4 tiles.
  • the progress of the removals can be done row of tiles by row of tiles, or rows of tiles by row of tiles.
  • a row of special tiles D0.1, to D0.4, whose pillars P ⁇ are divided, is placed from place to place.
  • Figures 9 to 16 show alternative embodiments in which the slabs Dp rest on walls or pillars M constituted by the ore itself to be exploited.
  • the removals are in this case located at different levels (see Figure 9).
  • the central cutout 1 between the pillars M is extracted first. Then the tiles are successively supported on their supports 17 and ore is extracted at the top of the pillars M (see Figures 10 and 11, in the case of a narrow site).
  • the walls of the vein are not vertical, the same principle applies, the descent of the slabs having to be accompanied by a horizontal translation (see Figure 12).
  • the tiles Dp are inclined so as to be substantially perpendicular to the walls of the vein (FIG. 13).
  • Figures 14 and 15 show a similar site of greater width, with several parallel rows of tiles Dp, 1 to Dp, 4.
  • FIG. 16 represents a variant of FIG. 14 in which the slabs of the same row rest on separate walls or pillars, freeing up corridors under and between each slab (the number of corridors C1 to C7 greater than that of FIG. 14, for a lower number of rows of tiles).
  • This protection is alternatively obtained by means of shields 20 supported by deformable triangles 21 shown in FIG. 17.
  • the slab Dp descending in second, comprises at 22 a step causing the descent of the vertex B of the articulated triangle and thus ensuring the sealing of the device.
  • a device (not shown) is advantageously provided for protecting the empty spaces between slabs and walls of the exploited cavity and for supporting the roof.
  • This device avoids the eruption of scree in the site and allows the method to be adapted to changes in width of the site.
  • the pressure of the scree in contact with the wall of the site is generally low due to the presence of the slabs which support the entire load.
  • This device provides protection by simply advancing extensions through pins fixed in the slab, these extensions being loaded with a wooden or iron mattress. These easily advance or retractable extensions make it possible to adapt to variations in width of the site. A classic support by props can help during a strong extension of these extensions.
  • This device can be manually controlled (displacement of the extensions by the force of the wrist) or hydraulically controlled.
  • the arrangement of the tiles in rows and rows allows to obtain on the site a division into rooms and pillars with overlaps. It is therefore possible to use for the mining of the ore the materials known in these methods of chambers and pillars (shearers for example).
  • slabs (or beams) 16 meters long, 2 meters wide and 1.5 m high are used.
  • the corresponding pillars are cubic with a side of 2 meters, and are spaced 7 meters apart.
  • Such a reinforced concrete slab can be designed to support 200,000 kg / m2, which conventionally corresponds to around 80 m of scree.
  • the cylinders constituting the support and lowering means 17 have for example a stroke of 1.6 m, a sliding load of 200 tonnes and a lifting effort of 170 t.
  • the complete device can include 6 to 8 cylinders.
  • Figures 18 to 20 show a slab articulated in four successive elements 31, 32, 33 and 34 articulated to each other, step by step.
  • This is a variant of slabs (in concrete concrete) for the case of sloping veins with a thickness of 2.8 - 3 m. up to 8 m. for an orientation close to the vertical, or even more for veins of inclination less than 45 ° relative to the vertical.
  • the extreme elements 31 and 34 are in practice substantially parallel.
  • the element 31 is arranged along the roof 35 of the vein 36 of ore while the element 34 is disposed along the wall 37 of this vein.
  • These elements called “roof element” and “wall element” are adapted to come to bear on the ore by their lower ends 31A and 34A.
  • the intermediate elements 32 and 33 jointly form a vault whose opening angle or is all the greater as the width or power of the ore vein is important, as appears from the comparison of Figures 19 and 20
  • This variable opening of the vault makes it possible to follow the variations in width of the vein.
  • this angle is 180 ° and the arch is completely flattened.
  • caving scree 38 which hangs over the vault tends to open the angle of the vault, by flattening it, causing a lateral push from the lower edges 32A and 33A of the vault elements towards the roof and the wall, respectively, aimed at ensuring a transverse anchoring, or bracing, of the slab on the roof and the wall (silo effect); the extreme elements result in an energetic plating against the roof and the wall which may suffice, if necessary, to allow the retention of the slab even if the ore is felled under the feet 31A and 34A of these extreme slabs.
  • a spacer cylinder 40 (only shown diagrammatically by its line of action in FIGS. 19 and 20), can however be added to reinforce this transverse cladding.
  • FIGS. 18 and 19 or 20
  • any articulation of two constituent elements is formed of two side knuckles (hinge elements) integral with one of the elements, framing a central knuckle integral with the other of these two elements.
  • the joints are obtained by nesting an odd number of knuckles, on the one hand, and an even number of knuckles, on the other hand, to satisfy an overall symmetry of the elements with respect to a vertical plane perpendicular to the axes of articulations. There may also be knuckles of equal number on each element.
  • the knuckles of a joint are held coaxial by round bars 41, of steel for example, materializing the axes of articulation.
  • each of the extreme elements comprises a central knuckle 31B or 34B, pierced with a bore 42 for the passage of the articulation bars 41 while the arch elements 32 and 33 each comprising a pair of lateral knuckles 44 adapted to frame the central knuckles 31B and 34B, and pierced with bores 43 for the passage of the bars 41.
  • these lateral knuckles form the lower bearing edges 32A and 33A of the arch elements.
  • the element 32 further comprises, opposite its end 32A, a pair of knuckles 45, with bores 46, adapted to frame a central knuckle 47 pierced with a bore 48, formed on the element 33 to l opposite of its end 33A.
  • a central recess 49 of triangular shape, is provided in the element 32 between the roots of knuckles 45 while similar recesses 50 are provided on the element 33 on either side of the root of the central knuckle 47.
  • These recesses allow nesting of the roots of the knuckles: this nesting is almost maximal in FIG. 19, the roots of the knuckles occupying almost the entire volume recesses.
  • the diameter of the knuckles is greater than the thickness of the elements 31 and 34, which in particular facilitates these rotations, and reduces the necessary recesses.
  • the extreme elements 31 and 34 have, near the knuckles 31B and 34B, zones 31C and 34C thicker than their lower ends, adapted to resist the mechanical stresses appearing near these knuckles in service.
  • the plane containing the articulations of the end elements 31 and 34 to the arch elements 32 and 33 prefferably be generally perpendicular to the roof 35 and to the wall 37. It is possible to provide for this purpose extreme elements of different lengths, adapted to bear, by their advantageously bevelled lower ends, on an approximately horizontal ground: the extraction of the ore in this ground can thus be done by horizontal layers in spite of the slope of the vein 36.
  • pins 51 are provided on the side knuckles of the arch elements, for the attachment of temporary jacks, represented by their axes 52, for assisting in the descent of the slabs.
  • Networks of transverse bores 53 are advantageously provided in the end elements 31 and 34, to allow, in the case if necessary, bolting of these elements in the roof and the wall.
  • Figures 18, 19 and 20 show square arrays of bores 53 of slightly different designs.
  • the elements For example, for a slightly inclined vein (for example 30 ° relative to the vertical), 8 meters thick, the elements have for example the same width of 1.5 m. with 0.5 m knuckles. thick. Elements 32 and 33 have a length of 4.9 m. (including knuckles), and elements 31 and 34 have respective lengths of 6.2 and 4 meters. The width of the tiles may even be less (0.8 to 1 m, for example).
  • a plurality of articulated slabs are placed side by side, and ore is extracted step by step under each of them.
  • This extraction can be done under the ends 31A and 34A of the extreme slabs, as long as the lateral anchoring of the slab on the wall walls (roof and wall) is sufficient.
  • the jack 40 is provided to consolidate this anchoring by applying a separation force between the roof and the wall, perpendicular to them (hence the advantage that the joints 31-32 and 33-34 are in a plane perpendicular to those -this); however, it can sometimes be suppressed, or even neutralized (at least in the absence of extraction) when the caving scree is correctly distributed on the vault 32-33. If necessary additional jacks (not shown) can be mounted on the slab, in practice under the jack 40, to further strengthen the support of the extreme elements on the wall and the roof.
  • the latter is lowered by any appropriate means: the lateral bearing force is reduced and the descent of the slab is controlled along the wall and the roof.
  • one of course begins by reducing the spacing thrust applied by the jack 40, and the complementary jacks, between the elements 31 and 34. It is also possible, thanks to the jack 52, to cause a bringing together of the lower ends 32A and 33A of the arch elements.
  • This device is mobile, and preferably self-propelled and equipped with tires.
  • the descent of the slab can be controlled by means of jacks removably attached to the arch elements of the slab, by fittings provided in the slab when of his confection.
  • FIGS 21 and 22 illustrate, by way of example and partially, a mobile device 55 without traction arrangement.
  • This device comprises a movable frame 56, vertical cylinders 57 supporting sleepers 58 on which end plates come to bear by means of recesses 59 provided for this purpose; horizontal cylinders 60 are also provided for the lateral anchoring of the device on the slabs framing those during descent.
  • the frame 56 is completed with a similar frame next to it, for the descent of the other extreme element of the slab.
  • FIG. 23 illustrates in section a variant of an articulated slab made definitively flat, for the case for example where the width of the vein becomes too large.
  • the main difference between this slab 61 and that of FIGS. 18 to 20 lies in the presence of transverse irons 63 formed in the arch elements during their preparation. Reinforcement bars 63 are hung on these transverse bars, on each side of the axis 41 of articulation of the arch, the latter having been laid flat. Maintaining the vault in a horizontal configuration can be ensured by coming into abutment with possible confrontation surfaces provided on the vault elements and / or by pressing the articulation zone of the vault on the reinforcement bars. We then proceed to formwork these irons 63 to stiffen the slab. The extreme elements can then be removed, so as to have only one horizontal slab.
  • Such a monobloc slab can be laid in support on appropriate support means (ore wall or concrete pillars).
  • the lateral anchoring of the slabs on the wall can also be done by means of piston rods which come directly to anchor in the wall, as is shown in FIGS. 24 to 26 which represent monobloc slabs 71 having cavities 72 of where laterally run channels 73.
  • a slab 71 is supported by low walls 74 and 75 of ore and is supported on the left against a hanging wall 76.
  • the cavity 72 In the cavity 72 are cylinders 77 whose cylinders 77A are supported against the left wall of the cavity and whose pistons 77B are extended by pins 78 intended to pass through the channels 73 and to come into abutment against the wall 79.
  • These jacks are supplied with fluid by flexible pipes, not shown.
  • three jacks 77 can be provided at each end of each slab put into operation, the time to cut down the ore located at the top of the walls 74 and 75.
  • a carriage 80 fitted with wheels comprises a support structure 82, movable in height under the action of jacks 81 adapted to come to rest on the ground for reasons of stability, carrying cradles 83 for groups of transverse jacks 77 and rails 84 adapted to come to bear under the slabs to allow support and guidance downhill.
  • the tiles for example, are 7 m long. a width of 7.5 m. and a 0.5 m cavity. Depth.
  • the bottom of the gallery is first cut down, then the top of the gallery.
  • the latter Before cutting down the ore at the top of the walls supporting a slab (here two slabs), the latter is placed in lateral support by the installation of jacks 77; the top of the minerals is cut down (most often the cart 80 is removed for reasons of space), then the cart 80 is brought back and the slab is supported by the rails 84 while the pressure in the jacks 77 is released; the descent of the slabs is controlled by the cylinders 81. The operation is then repeated for the slab (s) immediately to the right.
  • the jacks 77 all act in the same direction by pressing the slab towards one hanging wall and pins towards the other hanging wall.
  • the jacks are arranged head to tail, with pins, protruding through channels 73 formed on either side of the central cavity, each side of the slab whose walls of the central cavity take up the spacing forces.
  • the cylinders 40 for plating the end elements against the wall can be replaced by a plurality cylinders individually pressing one end element against a wall, by pressing directly on the other wall, through the opposite end element.
  • Such jacks can, for example, act on the flared part of an end element (near thick areas 31C or 34C) and pass through the end element opposite by means of a recess 29 (see FIG. 22).
  • Such individual plating means make it possible, for example, to lower the opposite end elements alternately, one end element remaining fixed while the other descends, and vice versa. The extraction on the ground is then done alternately, sometimes along one wall, sometimes along the other wall.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
EP87401218A 1986-06-19 1987-06-01 Procédé d'exploitation de mines ou carrières souterraines par enlevures descendantes et foudroyage et installation pour sa mise en oeuvre Expired - Lifetime EP0250286B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU74226/87A AU582499B2 (en) 1986-06-19 1987-06-15 Mining or underground quarrying method and installation for implementing same
PT85112A PT85112B (pt) 1986-06-19 1987-06-17 Processo para a exploracao de minas ou pedreiras subterraneas por meio de relevos descendentes e desbaste e instalacao para a respectiva execucao

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8608846A FR2600374B1 (fr) 1986-06-19 1986-06-19 Procede d'exploitation de mines ou carrieres souterraines par enlevures descendantes et foudroyage et installation pour sa mise en oeuvre
FR8608846 1986-06-19

Publications (2)

Publication Number Publication Date
EP0250286A1 EP0250286A1 (fr) 1987-12-23
EP0250286B1 true EP0250286B1 (fr) 1991-09-11

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EP87401218A Expired - Lifetime EP0250286B1 (fr) 1986-06-19 1987-06-01 Procédé d'exploitation de mines ou carrières souterraines par enlevures descendantes et foudroyage et installation pour sa mise en oeuvre

Country Status (10)

Country Link
US (1) US4979780A (enrdf_load_stackoverflow)
EP (1) EP0250286B1 (enrdf_load_stackoverflow)
AU (1) AU582499B2 (enrdf_load_stackoverflow)
CA (1) CA1280614C (enrdf_load_stackoverflow)
DE (1) DE3772866D1 (enrdf_load_stackoverflow)
ES (1) ES2025179B3 (enrdf_load_stackoverflow)
FR (1) FR2600374B1 (enrdf_load_stackoverflow)
IN (1) IN169725B (enrdf_load_stackoverflow)
PT (1) PT85112B (enrdf_load_stackoverflow)
ZA (1) ZA874210B (enrdf_load_stackoverflow)

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Publication number Priority date Publication date Assignee Title
FR2600374B1 (fr) * 1986-06-19 1988-09-23 Charbonnages De France Procede d'exploitation de mines ou carrieres souterraines par enlevures descendantes et foudroyage et installation pour sa mise en oeuvre
FR2655685B1 (fr) * 1989-12-08 1992-03-13 Marion Rene Engin pour la manipulation de dalles de plafond dans une exploitation miniere.
RU2151293C1 (ru) * 1996-11-11 2000-06-20 Атрушкевич Аркадий Анисимович Способ управления труднообрушаемой кровлей при разработке угольных пластов механизированными комплексами
US6957166B1 (en) * 1998-04-30 2005-10-18 The United States Of America As Represented By The Department Of Health And Human Services Method and apparatus for load rate monitoring
RU2312219C2 (ru) * 2005-07-26 2007-12-10 Институт горного дела Севера им. Н.В. Черского Сибирского отделения Российской академии наук Способ подготовки к первичной посадке труднообрушаемой кровли
US8590982B2 (en) 2009-07-10 2013-11-26 Joy Mm Delaware, Inc. Longwall mining roof supports
RU2471989C1 (ru) * 2011-05-10 2013-01-10 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" Способ управления труднообрушающейся кровлей при отработке газоносных пластов в лавах с мехкомплексами
RU2472931C1 (ru) * 2011-06-08 2013-01-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" Способ управления труднообрушающейся кровлей при отработке газоносных пластов в лавах с механизированными комплексами
CN102444401B (zh) * 2011-11-28 2013-12-25 袁树来 薄煤层炮采工作面充填采煤方法及相关设备
CN115431283B (zh) * 2022-09-05 2024-09-06 枣庄矿业(集团)济宁七五煤业有限公司 一种顶板深孔爆破装药机械手装置
CN116971823B (zh) * 2023-08-15 2024-07-09 宁夏王洼煤业有限公司 斜井柴油机单轨吊机车辅助运输系统及控制方法
CN120139820B (zh) * 2025-05-12 2025-07-29 长沙矿山研究院有限责任公司 跟随采矿工作面上升的装配式天井构筑方法

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Also Published As

Publication number Publication date
ZA874210B (enrdf_load_stackoverflow) 1987-12-15
IN169725B (enrdf_load_stackoverflow) 1991-12-14
DE3772866D1 (de) 1991-10-17
PT85112A (pt) 1988-07-01
AU582499B2 (en) 1989-03-23
FR2600374A1 (fr) 1987-12-24
PT85112B (pt) 1993-05-31
CA1280614C (fr) 1991-02-26
ES2025179B3 (es) 1992-03-16
AU7422687A (en) 1987-12-24
FR2600374B1 (fr) 1988-09-23
EP0250286A1 (fr) 1987-12-23
US4979780A (en) 1990-12-25

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