EP0257652A1 - Procédé et dispositif pour l'avancement d'une galerie d'exploitation la situant dans le mur d'une couche - Google Patents

Procédé et dispositif pour l'avancement d'une galerie d'exploitation la situant dans le mur d'une couche Download PDF

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Publication number
EP0257652A1
EP0257652A1 EP87112516A EP87112516A EP0257652A1 EP 0257652 A1 EP0257652 A1 EP 0257652A1 EP 87112516 A EP87112516 A EP 87112516A EP 87112516 A EP87112516 A EP 87112516A EP 0257652 A1 EP0257652 A1 EP 0257652A1
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EP
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Prior art keywords
route
machine
extraction
coal
expansion
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Granted
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EP87112516A
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German (de)
English (en)
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EP0257652B1 (fr
Inventor
Klaus Prof. Dr.-Ing. Spies
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Rudolf Hausherr and Sohne GmbH and Co KG
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
    • E21D9/1013—Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom
    • 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
    • E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal

Definitions

  • the invention relates to a method and devices for driving a mining or seam section laid in the lying area of a seam with a short strut.
  • the object of the invention is to create a method and devices of the type mentioned at the outset which enable the cutting work of the tunneling machines to be completely overlapped in time and the track extension to be introduced.
  • the dismantling routes and the route expansion should be designed in such a way that the current major difficulties at the face of the face can be reduced or eliminated.
  • the mastery of the mountains in the area of the hemline and the problem of machine stalls should be solved. It is also to be started strive that the mining sections can be used twice even under difficult geological conditions, namely once as a coal discharge section and on the other hand as a top section. Furthermore, special ventilation with its disadvantages should be avoided.
  • the machine-technical equipment in the short strut in one possible concept variant consists of a short-form shearer loader 1, the drum of which is attached to a movable swivel arm, a conveyor 2 angled on one side into one of the accompanying roses and with this conveyor Pull-out devices connected expansion units 3, which can alternatively or alternatively in the same concept variant be designed as trestles or removal shields.
  • the machine guide In order to obtain the same amount of coal per unit of time during the cutting process as during the normal extraction run along the short front 4, the machine guide is angled on both sides into the accompanying florets. On one side a bend 5 of the machine guide is sufficient, on the other side a bend 6 is necessary for the machine guide and face conveyor.
  • the length of the short front 4 should be approximately 20-30 m.
  • the excavation section 7 is preferably arranged in the middle in a lying position.
  • the parts of the line expansion necessary for securing the slope, not shown in Fig. 1, are already set or inserted immediately behind the ends 8 of the middle extension units 3 facing the line, so that all downstream operations, including the production of the actual dismantling line, take place in the expanded area can. This means that - in contrast to the currently known tunneling technology - the machine equipment no longer has to be shut down in order to implement the expansion.
  • the excavation section 7 arranged in the horizontal position is produced by a striking head machine 9, the loading device 10 of which is designed as a lobster scissor loader.
  • the striking head machine has two striking tools 13, 14 arranged on spatially movable swivel arms 11, 12, preferably hydraulically driven. Over the one attached to the rear of the machine swiveling short conveyor 15, the loosened and loaded pile is transferred to an intermediate conveyor 16 which can be moved by wheels, which forwards the loaded mountains to the crusher 17 which can be moved on caterpillars, which carries out the further comminution and feeds the intermediate bunker via the boom conveyor 18 connected to it.
  • the blowing machine By means of the blowing machine, the blown mountains are blown in dams 22 arranged on the side of the mining section in such a way that route accompanying florets 23 are created between the dams and the coal present surrender.
  • the dams are manufactured at a distance of 10 - 20 m behind the longwall construction 3 of the short strut.
  • two blast pipe strands 24, 25 are arranged on guide and support devices (not shown) in the dismantling section 7, so that the blower lines can also be advanced with little labor and expense, following the high speed of advance.
  • the two blower line strands are guided into the two accompanying roses 23 via spatially curved connecting pieces, where they are continued in line strands 28, 29 that are preferably movable on the lying surface.
  • the blow line strands 28, 29 arranged in the accompanying florets 23 can be brought forward according to the progress of the dismantling.
  • sliding formwork 32 is provided in the concept variant described in Fig. 1, which can be pulled forward via hack 33 and ropes 34.
  • the niches 26, 27, 35, 36 between the line accompanying dams 22 have a dual function. On the one hand, they serve to guide the blow line strands from route 7 into accompanying escutcheons 23 when driving up the route. During the subsequent dismantling, in which the loading scraper lies in the escutcheon facing the strut, the niches have the purpose of guiding the conveying flow via fixed slides from the loading scraper to the rubber belt conveyor laid in the excavation section 7.
  • the weather guidance can take place, for example, in such a way that the fresh weather is supplied via the accompanying florets 23 and then passed through the short strut, while the weathering flows back through the mining section 7.
  • the area between the strut-side front ends of the accompanying dams 22 and the rear ends 8 of the strut construction is divided into two wet sections by weather separators, not shown in FIG paths shared.
  • the niches 26, 27, 35, 36 are closed during the route in order to avoid short circuits in the weather.
  • the niches 26, 27 through which the blow line strands have to be guided are closed by flexible weather separators 37, 38, while the niches 35, 36 are preferably sealed by polyurethane foam walls 39, 40.
  • the polyurethane foam walls can be easily removed again before dismantling, if the weather conditions have to be changed from counter-clockwise to counter-clockwise. Since at least one of the two accompanying escutcheons 23 is available in addition to the degradation route 7 by using the route system described in FIG. 1 as an accompanying degradation route, the total available weather cross section increases in an advantageous manner. This will have an extremely favorable effect when moving to larger depths, because larger amounts of weather have to be supplied due to the higher mountain temperatures.
  • the face conveyor 2 is bent into one of the two escorts 23 by means of the rolling curve 6.
  • the conveyor part 41 located in the accompanying tube is dimensioned so long that it overlaps the loading scraper 42 by a sufficiently large amount so that the loading scraper only at reasonable intervals, For example, on the repair and maintenance layer, must be brought forward.
  • the delivery flow arising during line advance is transferred through a slide from the accompanying tube 23 to the rubber belt conveyor, also not shown, which is laid in the extraction line 7.
  • cutting slots are produced from the seam lying down to the level of the future road level by specially designed machines.
  • the slots 43 run transversely, the slots 44 along the line axis.
  • Fig. 2 shows a cross-section of the excavation section and the accompanying florets at position AA in Fig. 1.
  • the excavation section 7, which has been laid out lying flat, has a slightly trapezoidal cross-section in order to increase the stability of the section joints 45.
  • rock anchors 46 can be used, which are set from the escutcheons 23, or anchors 47, which are introduced from the mining section 7, can be provided.
  • the length and the arrangement of the rock anchors 46, 47 depend on the geological conditions, the cut of the excavation and the spatial dimensions of the excavation section 7, on the location and shape of the accompanying trunks 22 and the accompanying florets 23.
  • the accompanying dams 22 are displaced by a corresponding amount 49 in the direction of the accompanying florets 23 relative to the edges 48.
  • the accompanying dams 22 themselves are solidified under the action of the additional pressure and thus initially give way, so that a not inconsiderable part of the compressive stresses can be relieved via movements which take place on the cracks which arise.
  • the track extension consists of rock anchors 51 and a cap 52 made of steel or reinforced, mineral, hydraulically setting building material, which can be supported with its ends 53 in the offset dams 22.
  • the expansion can also consist of rock anchors 51 and wire mesh warping.
  • the hanging area in the escapes 23 is - similar to the area of the later mining section 7 - also secured immediately behind the longwall construction of the leading short strut, not shown in Fig. 2, by rock bolts 54 and wire mesh or mesh warping 55.
  • the expansion component of the track expansion which due to its strong, robust and compliant design is suitable for the later absorption of the additional pressure during the strut passage, is placed at a certain distance behind the actual tunneling site. so as not to hinder the tunneling work.
  • Fig. 3 shows a cross section through the short strut with the extraction machine, face conveyor, extension and the associated auxiliary units, which are required to insert the anchor extension and in two of the possible concept variants for producing the cutting slots 44.
  • Fig. 3 corresponds to the section BB in Fig. 1.
  • the extraction machine used in this variant of the concept is a roller loader 56 with a pivotable arm 57 and roller 58 arranged on this arm.
  • the machine body 56 of the roller loader 1 which is guided on the face conveyor 2, should be relatively be of short construction so that the shearer loader can be guided through 90 ° curves at the two ends of the short strut on the corresponding guideway bent into the escutcheons.
  • An essential criterion of the three concept variants for the extraction machine system component is that the amount of coal released per unit of time remains constant, which is possible with the two concept variants, in which the extraction machines work with partial intervention, in that the cutting process
  • the amount of coal generated per unit of time is the same as the amount of coal released per unit of time when driving along the face of the longwall.
  • the extraction process itself can be carried out in such a way that the roller loader first releases the upper coal in the form shown in Fig. 3 with the roller 58 and then the sliding caps 60 of the longwall construction 61 are extended in order to minimize the expansion delay and the exposed slope area to keep. Then the roller 58 would be pivoted with the boom 57 at the end of the short strut to the prone cut and the undercoat could be extracted.
  • the swivel arm 57 executes a pendulum movement in such a way that the roller 58 constantly processes the entire coal impact between the hanging and the lying.
  • the loading process is carried out by a clearing plate and a not shown the coal end of the conveyor 2 screwed on ramp 59 supports.
  • the extension 61 is connected via a guiding and returning device 62 to the face conveyor 2 and its lateral screw-on parts 63, which receive the cutting cable and contain the feed device.
  • the cap pull On the side facing away from the winning stroke, the cap pull contains a second sliding cap 64 which is approximately half the width of the main cap 65 of the face structure 61.
  • the sliding cap 64 pointing in the direction of the track advance is supported at its free end by a hydraulic ram 66.
  • the anchor hole drilling and anchor setting device 67 is arranged on the side of the sliding cap 64.
  • the drilling machine 69 moves with the boring bar 70 in a guide mount 68.
  • the rock anchors are also inserted and set via the drilling machine 69.
  • the drilling machine can also be angled to the side, arranged next to or between the guides and the power can be mechanically transmitted to the boring bar via a bevel gear.
  • the anchor hole drilling and anchor setting device 67 is firmly displaced and the face structure 61 - following the extraction - can move forward independently thereof.
  • the punch 66 is retracted and the sliding cap 64 is pulled into the main cap 65 by a back cylinder, not shown. Then the punch 66 is set again and the anchor drill holes of the next row of anchors can be made.
  • the expansion joint which is indispensable for the process, is realized between the subsystem extraction, longwall mining, expansion on the one hand and the subsystem installation of anchor removal on the other.
  • 61 slot machines 71 are arranged on the lying surface for the concept variants "propulsion with impact head machine” and "explosive propulsion" in the area of or immediately behind the skids of the extension.
  • the slitting machines have a swiveling boom 72, over which a cutting chain 73 runs, which is covered with picks 74.
  • the slitting machines have their own drive for the movement of the cutting chain, which is preferably used as a pressure Air drive is designed to enable a continuous control of cutting force, chain belt speed and feed force of the machine.
  • Control devices (not shown), for example microprocessors, can link the hydraulic cylinder 75 to form a control loop.
  • the feed cylinder 75 which is preferably designed as a multiple telescopic cylinder, is arranged between the runner end 61 of the longwall structure 61 facing away from the carbon front and a guide rod 76 in such a way that the piston side with the larger piston surface is always available for advancing the slitting machine.
  • both the piston space and the annular space of the cylinder 75 are connected to the hydraulic return line of the pressure line system for the longwall construction 61, not shown, so that it can be preferred at all times to the extraction without exerting forces on the slitting machine 71 will.
  • the slitting machine 71 can be equipped in addition to the cutter arm 72 with a cutter mushroom 77 arranged in the vicinity of the machine body.
  • the shrinking felt 77 has the cross section of a truncated cone in order to produce a horizontal support surface 78 along the edge 48 in the case of oblique butt joints.
  • the cutting chain 73 In the feed direction behind the slitting machine 71, the cutting chain 73 preferably runs in the direction of the arrow "undershot", a suction device 79 for the small cutting and the resulting dust is arranged, which ensures that the cutting chain 43 cannot be blocked by the loosened material.
  • the rock released by the shrinking pieces 74 takes up a volume increased by the bulk factor in the shaving slot, so that at least the amount corresponding to this increase in volume is sucked off by the suction device 79 to ensure that the cutting chain 73 is not blocked.
  • Fig. 4 shows the mechanical strut system including the additional equipment such as anchor hole drilling and anchor setting machine as well as the slot machine for the concept alternative roller loader, ie the same machines technical equipment as shown in Fig. 3, in plan.
  • Fig. 5 shows the concept variant "extraction device working sideways and in front of the head” for the system component extraction machine in plan and side view.
  • the face conveyor 2 and its lateral screw-on parts 63 correspond in principle to the embodiment shown in FIGS. 3 and 4 for the concept variant of roller loader.
  • the face conveyor is connected via the guide and return device 62 to the face construction not shown in Fig. 5.
  • This corresponds in its basic structure, including the anchor hole drilling and anchor setting devices 67 and for the concept variants "propulsion with impact head machine” and “explosive propulsion” including the slot machine 71, to the embodiment shown in FIGS. 3 and 4.
  • the extraction machine for lateral operation and head-to-head extraction essentially consists of a loading platform 80 which protrudes in the direction of the coal impact above the conveyor and can be moved on the conveyor, bearing blocks 81 arranged on the loading platform and a pivoting boom 82 which is located at its free end carries the extraction tools.
  • the swiveling boom is in nem preferably the region adjacent to the pivot bearing 83 so that it can accommodate the drive motors and the reduction gears.
  • the loading platform 80 tapers at its coal-end 84 to promote the loading process when cutting into the struts.
  • the loading platform is equipped with side loading ramps 85, which extend as close as possible to the conveyor side wall or to a loading ramp attached to the coal end of the conveyor.
  • Active loading aids 86 are arranged on the wide ramp of the loading platform 80 and extend in their pivoting range beyond the edge 87 of the loading platform.
  • the cross section of the loading arms 88 is designed so that the resistance when immersed in the pile is small, but the subsequent loading effect is large.
  • a plurality of self-contained cutting chains 89 which are equipped with creases, run over the pivotable boom 82 and drive two cross-cutting heads 90 arranged on the two free ends of the boom.
  • Picking circular arcs in radius are only slightly smaller than the radius of the largest circular arc formed by the picking of cross-cutting heads 90.
  • the conveyor and extraction machine are pressed forward by the guidance and return devices 62 and, if necessary, by powerful additional return cylinders, not shown in FIG. 5, with extraction tools running.
  • the boom 82 cuts in front of the head by the next field width in the coal pile. This incision can be made on the hanging, lying or anywhere on the seam profile.
  • the boom 82 sweeps the entire seam height with the extraction tools 89, 90 so that a new slump occurs, the per unit time
  • the amount of coal released corresponds to the amount of coal released per unit of time on the normal mining trip along the long face.
  • the extraction machine can first release the coal in the area of the seam near the slope, depending on the extraction method of the shearer shown in Figs. 3 and 4, whereby the sliding caps 60 of the longwall construction 61 are pushed forward immediately after passing the extraction machine and then on a second extraction run Coal is loosened at the seamle; however, it is also possible for the pivotable boom 82 to perform an oscillating pivoting movement during the extraction run, so that the coal is released over the entire seam thickness during a extraction run.
  • the conveyor is connected to the longwall structure 61 via a guide and return device 62.
  • Sliding caps 60 are extended synchronously with the progress of the extraction, while the extension 61 is moved in at certain time intervals.
  • the blast holes are preferably made perpendicular to the seam, that is, in planes parallel to the working face, in order to blast off the slice of rock, which is only exposed laterally through the two cutting slots 44, in a manner comparable to the principle of "stagger blasting".
  • the blast holes are preferably produced by means of a fully or partially automatic drilling device, which preferably drills several rows of holes at the same time or the length of an entire tee with several drilling machines.
  • the drilling device is advanced before blasting by means of traction means 96 and winches, which are arranged on the longwall construction, not shown. Hydraulic clamping rams 97a, which are displaced in tabs 97b, ensure that the drilling device maintains its position during the drilling process.
  • the stamps take over it also the part of the reaction forces from the pressure forces of the cutting edges that exceeds the weight of the drilling device.
  • the drilling device itself consists of a strong frame 97, which is shifted on wide runners.
  • the bridge-like traverse 99 which carries the drilling machines 100, can be moved back and forth over this frame by means of feed devices (not shown).
  • the crossbeam is moved further in the direction of the arrow after drilling a number of boreholes, the boreholes 101 having already been drilled, while boreholes still have to be produced at the locations 102.
  • the drilling device is guided in the cutting slots 44 via guide cams or guide swords 103.
  • bearing brackets 104 are arranged, on which a heavy steel plate 105 is pivotally attached. In the normal state, for better weather management, the steel plate 105 is folded back onto the bed, only during the blasting is it swung up into the position shown in the figure in order to protect the drilling device from damage by flying rocks.
  • a loading machine 106 with a loading arm 106a is used, which transfers the loaded rock to the mobile intermediate conveyor 16.
  • the downstream units which are not shown in Fig. 7, correspond in design and arrangement to the downstream units in Fig. 1.
  • the distance between the face, the excavation section 7 and the short strut is dimensioned such that, including safety devices such as the swiveling one Steel plate 105, the automatic coal extraction does not need to be interrupted during the blasting process.
  • Fig. 8 describes the line jacking with the concept variant "cutting head machine". Behind the short strut, the longwall structure 3 of which is equipped on its side 8 facing away from the coal joint with sliding caps 64, support punches 66 and combined anchor hole drilling and anchor setting devices, the exposed hanging area is secured by anchoring wire mesh or rock anchors with attached caps.
  • This safeguarding allows the cutting head machine 107, which has loading devices 107a and a boom conveyor 108, not to be introduced, as in the previously known tunneling methods of the line expansion needs to be stopped. In this way, the propulsive power is more than doubled.
  • the boom conveyor 108 passes the loosened pile onto the movable intermediate conveyor 16, which is followed by the downstream devices according to FIG. 1, not shown in detail in FIG. 8.
  • the cutting arm 109 can, as shown in FIG. 8, be equipped with a longitudinal cutting head or else with a cross cutting head. Slashing slots on the excavation joints of the route, such as are useful for blasting or driving with a hammer head machine, can be omitted for the type of tunneling with a cutting head machine.
  • the separation between the excavation section 7 and the accompanying florets 23 can be made either by the accompanying dams 22 shown in FIGS. 1 and 8, which are preferably produced by blowing offset, or according to FIG. 7 by one or more rows of stamps 95 if the offset is placed at a greater distance behind the face or is used to cushion the route expansion.
  • the two alternative options, escort dam 22 or rows of stamps 95 mainly depend on where and for what purpose the broken local mountains are introduced.
  • Fig. 9 shows a cross-section through the excavation section and accompanying escapes, as it can be - regardless of the type of tunneling on the face - in the expansion variant "doorstep-like support stamp" at a greater distance behind the tunneling site (section CC in Fig. 1 ).
  • the anchors 51 are placed immediately behind the longwall construction in the area of the later mining section 7 and the anchors 54 in the area of the accompanying escutcheons 23.
  • Either a cap 52 or wire mesh or mat warping can be attached under the anchors 51.
  • Wire mesh or mat distortion 55 should also secure the hanging in the accompanying florets in the area of anchor 54.
  • stamps 95 are placed in the area behind the longwall construction, which additionally support the caps under their free ends.
  • the stamps 95 are intended both to support the hanging wall and also to accommodate the fabric 110 for delimiting the offset dam 22 on the track side.
  • the offset dam can either be built directly behind the longwall construction or at a greater distance behind the tunneling site.
  • the offset dam is delimited by a woven wire mesh mat 111, which can be attached to the anchors 54 on the slope side and to the anchors 46 on the lying side.
  • the anchors 51, 54, the cap 52 as well as the wire mesh or mat distortion 55 and finally the stamp 95 in their entirety represent the expansion component which has to withstand the pressure phenomena which lead to the convergence of the collision.
  • the second expansion component must be introduced in good time before the additional pressure occurs, which additional component has to withstand the pressure phenomena of the additional pressure and has to absorb the major part of the convergence of the route.
  • game consists of the second expansion components made of door frame-like stamps, preferably resilient via friction, which are placed near or on the edge 48 between the track joints and the seam and are held on the cap pull 52 in corresponding bearing shells 112.
  • the punches consist of two parts 113, 114 which are telescopically movable in and on one another, the supporting force of which is generated by connecting elements 115, which preferably operate according to the friction principle.
  • the doorstep-like stamps can be supported on brackets 116, which are displaced in a runner 117, which can consist of mineral, hydraulically setting building material and which is located in step 78, which is caused by the shrinking mushroom 77 on the bracket shown in the embodiment on the right of the illustration end of the route joint near the horizontal is generated (see Fig. 3).
  • the edge 48 in the region of the door frame-like stamp can be encompassed by angle plates 118 which carry the brackets 119 for the stamp.
  • the possible migration of the route joints 45 under the action of the additional pressure is counteracted by the initiation of the supporting force of the expansion. Additional anchors 47 at the line joints can support this effect.
  • Fig. 10 Another constructive solution for the design of the second component for the line expansion, which has to absorb the effects of the additional pressure and the vast majority of the overall convergence, is shown in Fig. 10.
  • the expansion component which is also introduced in the area of the section CC in Fig. 1, consists of polygon-like spreaders that support one another in joints.
  • the first expansion component which has to absorb the effects of the pressure phenomena arising when opening, can be constructed and assembled differently, for example as shown in Fig. 2 or in Fig. 9 and described for these.
  • the upper part of the expansion component intended to accommodate the additional pressure corresponds to the embodiment shown in Fig. 9.
  • the stamps in the upper part of the section cross-section consist of two components 113, 114 which are preferably telescopically movable into one another via a friction lock 115. They are supported with their upper components 113 in bearing shells 112 which are attached to the caps 52. If as a preliminary route expansion immediately behind the longwall Removal Anchors with wire mesh warping have been introduced, the bearings 112 are arranged on a short cap, which is placed simultaneously with the punches in the area of the cut CC, Fig.
  • the components 113, 114 of the upper punches do not have to be made of steel. These can also consist of other materials or even just formwork elements, which after their installation are filled with mineral, hydraulically setting building material. It is only important that they can be moved axially against each other while building up a high resistance to expansion.
  • a curved polygon support 120 is shown on the left side of FIG. 10 to identify a special embodiment, while the straight polygon support 121 shown on the right side shows a simpler alternative.
  • Both polygon supports 120, 121 are connected to the upper resilient stamps via joints 122 and are leveled at points 123 in the track base in order to be able to better withstand the horizontal pressure effects which can occur as a result of the additional pressure during dismantling.
  • pressurized mountains and especially in large depths it must be expected that over the outside on both sides or on one side next to the accompanying florets standing coal considerable pressure effects are exerted on the seam lying, which lead to the fact that, despite cutting slots 50 and lying anchors 46, 47 - in Fig.
  • the lateral section joints 45 can be moved into the lower part of the excavation section 7.
  • a curved polygon support 120 largely resists such thrust effects, since its curvature generates compressive stresses in the structural parts under load from the impact pressure. If curved polygon supports 120 are used for the lower part of the route, then the stretch joints 45 must be shaped accordingly during the advance work or - if blasting work is used or hammer head machines are used - the cutting slots 44 have to be produced with appropriately curved arms.
  • Figs. 11 and 12 also assume the division of functions for route expansion.
  • the expansion components in Figs. 11 and 12 also have the expansion component that is used to absorb the pressure phenomena when opening and converging, depending on the geological conditions, the geometric shape of florets and the distance and Operation cut from combinations of anchors 52, 54, caps 53, wire mesh or mat distortion 55 and stamps 95.
  • the second expansion component which serves to absorb the additional pressure and the vast majority of the overall convergence, is introduced.
  • the expansion principle according to Fig. 11 and 12 is based on a further division of functions, namely that the route expansion itself only has to take up the supporting force, while the function "compliance to absorb the convergence" is provided by the offset which is produced from the broken local mountains. Since the offset is based on the expansion, it is designed in the form of a closed shield compared to the open route profile. The specific loads are lower than with conventional expansion, since the expansion elements are always loaded on their entire outer surface and not in a punctiform manner. As it is known that rock tensions are reduced by movements on the resulting fractured surfaces, the pressure effects decrease with increasing compression of the offset. The three decisive advantages of this new type of expansion (concept variants as shown in Figs.
  • the track extension can consist of a vault arranged above the trapezoidal lower part of the excavation track 7, which is supported on the seam lying on its lower free leg with support feet or support strips 124.
  • the side parts 125 of the roof-shaped track extension are arranged at such an angle on the support feet or support straps 124 that the corresponding forces have sufficiently large horizontal components when loaded, so that the migration of the track joint 45 is effectively counteracted in this way.
  • the roof-shaped track extension can be made in one part or - as shown in Fig. 11 - in two parts. In the latter case, the two components 125 are connected to one another by a joint 126.
  • the roof-shaped track extension can consist of individual elements that are installed in the area of section D-D (Fig. 1) and that lie flush with one another.
  • individual elements can be provided on which sealing drafting sheets lie.
  • lightweight elements made of thin sheet metal which serve as formwork for the subsequent form of route expansion, and filling them with mineral, hydraulically setting building material after installation.
  • Steel reinforcements are used in all expansion variants in which mineral, hydraulically setting building material is used in order to be able to adequately withstand possible bending or tensile loads.
  • the broken break piles are preferably in the form of a blowing offset in the region 127 above the section ridges and introduced laterally to the accompanying florets.
  • Offset fabric with mat mesh 110 which is preferably attached to stamps 95, limits the offset dam against the accompanying florets.
  • Additional anchors 46, 47 can be introduced to secure the route joints 45.
  • recesses are provided in the track extension 125 and in the offset dam 127 in the form of slashes in order to facilitate the conveyance of the loading scraper laid in the escutcheons 23 onto the track conveyor arranged in the removal section 7 (preferably Rubber belt conveyor).
  • Fig. 12 shows an expansion variant that is very similar to the expansion shown in Fig. 11 in terms of the working and functional principle.
  • the difference to the configuration according to Fig. 11 essentially consists in the fact that the lateral legs of the arch-like configuration are pulled through to the bottom of the section and anchored at points 128 in the latter.
  • the combination of anchors 51, 54, cap 52, wire mesh or mat warping 55 and stamps 95 introduced in the area of the tunneling site corresponds in design and variation possibilities to the variant shown in FIG. 11.
  • the vault-like expansion 129 shields, comparable to the canopy 125 of the variant shown in Fig.
  • the expansion can consist of metal segments and mineral, hydraulically setting building material.
  • pointed arches can be used, between which sealing delay plates are arranged.
  • precast concrete parts can be installed, sliding formwork can be used and formwork elements can be used, which are filled in on site after installation.
  • the expansion is carried out to achieve a kind of "icebreaker effect".
  • a swipe 131 is shown as a connection between the section 7 and one of the accompanying florets 23, which can consist, for example, of preformed tubes or similar molded parts 132 which are blown into the offset 127.
  • the tunneling and cutting system according to the invention has the following considerable advantages over the known tunneling types for excavation routes that are driven independently of the expansion.
  • the driving costs for driving up the route are largely covered by the coal from the leading longwall. Assuming a seam thickness of 1.8 m and assuming a face length of 25 m and a propulsion speed of 30 m / d, the short face provides a daily usable subsidy of 1350 tvF / d.
  • the possibility of extensive automation or process control of the most important work processes in the longwall which results from the good clarity in a short 25m long shortbar, allows the longwall to be occupied by only two men per extraction layer.
  • the investment and the lending service - assuming the same seam thickness - are only about 10% of the values for the "normal striving".
  • the repair costs are also significantly lower compared to the "normal strut".
  • the target costs of the coal obtained in the leading short strut are considerably lower than the target costs of the "normal strut", so that this difference already covers a substantial part of the route costs.
  • These, in turn, are also only a partial amount of the currently usual excavation costs for mining sections. If - based on the running meter distance - from the total target costs of the the current "normal strut" plus the contribution for the two accompanying stretches of stripping deducts the striving costs for the coal obtained in the short strut, then there is a remaining amount with which, under favorable geological conditions, the effort for the traced mining stretches arranged in the horizontal with the two accompanying florets to a large extent can be covered.
  • the remaining amount is offset by the savings at the face and in the infrastructure, so that one can speak of an overall cost-covering route.
  • Extremely high tunneling speeds of 30 m / d and more can be achieved.
  • the high drive-up speeds in addition to reducing the drive-up costs per meter, result in the fact that the period between the planning decision and the provision of the tailored construction height is reduced to approximately 1/3 compared to the current state.
  • the concentration of material and production flow and the reduction of transport and production routes within the infrastructure have a cost-effective effect.
  • the location of the route to the seam corresponds to the latest rock mechanics knowledge for the route in great depths.
  • Mountain mechanical model investigations have shown that in the lying area the Seams cut can withstand the pressure phenomena to be expected in areas between 1200 and 1600 m depth to a much better degree than the current mining routes.
  • the zones of high additional pressure are shifted from the edge of the route to an area approximately 8 to 10 m away.
  • the accompanying florets can also be used as relief chambers for the pressure that acts on the seam edge areas.
  • the mining section can be double-sided, i.e. be used twice.
  • the type and form of the proposed excavation route allow double use (initially coal removal route and later overhead section), which means that in the event that the above-mentioned cost recovery should not be fully achieved, the remaining costs are halved.
  • the special cutting of the excavation route and accompanying florets eliminates the major part of the current difficulties at the face of the longwall during later dismantling. Since the escort florets are secured with an anchor extension, there is an extended machine stall along the entire length of the excavation, which is controlled by hydraulic hydraulics cantilever beams can be adequately secured in the area of the additional pressure to be expected.
  • the size of the machine stall ie the width of the accompanying florets, can be adapted by increasing the length of the short strut to the length of the extraction machines which are intended for later dismantling. Hem edges, which have to be intercepted and secured in terms of personnel and costs, no longer exist.
  • a route expansion that is optimally tailored to the rock mechanics requirements therefore consists of two components, the first of which must be sufficient to absorb the pressure phenomena when driving up, while the second component in connection with the first has to absorb the additional pressure and the convergence before, during and after the longwall passage.
  • the second component which is heavier in any case and more complex to bring in, can be installed in this way at a sufficient distance behind the tunneling site so that the actual tunneling process is not carried out by these operations burdens or is disturbed. If a strut continues to advance the excavation route and the route is driven in a lying position, it is possible to implement the expansion necessary to absorb the pressure phenomena when driving up before the tunneling site.
  • the tunneling machines and the loading equipment do not have to be shut down - as is currently the case - in order to bring in the track extension.
  • blasting, drilling, loading, blasting and loading also take place in areas in which the expansion component necessary to absorb the pressure phenomena when opening is already set.
  • partial cutting machines at least a doubling of the speeds of advance can be achieved, since the time-consuming cutting is also eliminated. A significant increase in performance is also possible with blasting.
  • the expansion and its introduction can be optimized.
  • the division of the functions of the track expansion leads to completely new types of construction, which can be designed particularly inexpensively with regard to fulfilling the rock mechanics and process engineering requirements.
  • the special ventilation which is usually the case with track drives, is no longer required.
  • the excavated section stretched in the lying position and the two accompanying florets represent three separate weather paths, which in this way enable connection to the main weather.
  • Fresh weather is supplied via the two escort florets, which are guided through the short strut and returned as weathering over the medium distance.
  • the outgassing to be expected in the short strut at 30 m mining speed per day can be managed on the way of the main weathering and with large amounts of weather.
  • the mines' layouts are influenced in an advantageous manner for the goal of constant total funding.
  • the number of device operations in a mine can be reduced.
  • two high-performance struts can be dispensed with with the same total funding of the mine. This results in a restriction of the total number of operating points (tunneling and striving) and thus a further concentration of operations. This results in very significant advantages for the mine infrastructure.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
EP19870112516 1986-08-29 1987-08-28 Procédé et dispositif pour l'avancement d'une galerie d'exploitation la situant dans le mur d'une couche Expired - Lifetime EP0257652B1 (fr)

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DE3629364 1986-08-29
DE19863629364 DE3629364A1 (de) 1986-08-29 1986-08-29 Verfahren und vorrichtungen zum vortrieb einer abbaustrecke mit einem kurzstreb

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EP0257652B1 EP0257652B1 (fr) 1992-04-01

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881358A1 (fr) * 1997-05-28 1998-12-02 TAMROCK VOEST-ALPINE Bergtechnik Gesellschaft m.b.H. Dispositif pour élargir des espaces creux
WO2015161833A1 (fr) * 2014-04-25 2015-10-29 缪协兴 Procédé de conception et d'optimisation de support hydraulique pour une exploitation minière utilisant des remblais solides
WO2019140813A1 (fr) * 2018-01-18 2019-07-25 山东科技大学 Procédé de formation de galerie par élargissement de galerie et creusement de tunnel et comblement par coulis de gangue dans une veine de charbon épaisse
CN113404498A (zh) * 2021-06-18 2021-09-17 安徽金日晟矿业有限责任公司 一种采用新型爆破方式的vcr采矿方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19649108B4 (de) * 1996-11-27 2006-02-09 Dbt Gmbh Kurzfrontmaschine für den Untertagebergbau mit einer Führung für ein Bohrgerät zum Herstellen von Bohrlöchern für die Firstverankerung
CN102748026B (zh) * 2012-05-22 2015-02-11 山东科技大学 一种短壁箱式采煤法
CN102996130B (zh) * 2012-11-21 2014-12-10 山东大学 适用于模型试验的自动化微型采煤系统
CN113338934B (zh) * 2021-07-07 2023-12-08 中国矿业大学 一种深部煤炭流态化开采原位气化装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE922529C (de) * 1952-03-02 1955-01-17 F W Moll Soehne Verfahren und Vorrichtung zur Sicherung des Hangenden beim Auffahren von Strecken, insbesondere fuer den Rueckbau
DE1167291B (de) * 1959-02-20 1964-04-09 Herbert Gorgosch Streckendurchsenkmaschine
DE2008412B2 (de) * 1970-02-24 1976-06-24 Walzenschrämmaschine Gebr. Eickhoff, Maschinenfabrik u. Eisengießerei mbH, 4630 Bochum Walzenschraemmaschine
US4007966A (en) * 1975-12-29 1977-02-15 Atlantic Richfield Company Single-entry mining development system
DE3335098A1 (de) * 1983-09-28 1985-04-04 Klöckner-Becorit GmbH, 4620 Castrop-Rauxel Abbauverfahren fuer floezartige lagerstaetten

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE862285C (de) * 1951-03-07 1953-01-08 Eickhoff Maschinenfabrik Geb Kettenschraemarm
DE1198304B (de) * 1959-09-07 1965-08-12 Maschf Vorrichtung zur Aufnahme und zum Versetzen des beim Streckenvortrieb anfallenden Haufwerks
DE1483920A1 (de) * 1966-06-28 1969-03-06 Gewerk Eisenhuette Westfalia Vorpfaendeinrichtung
GB1500180A (en) * 1975-07-11 1978-02-08 Coal Ind Mine packing equipment
DE2923441A1 (de) * 1979-06-09 1980-12-11 Brieden & Co Maschf K Wanderwand fuer den untertagebetrieb zum abschalen von blasend in streckensaeume eingebrachten dammbaustoffen
AT368247B (de) * 1980-11-20 1982-09-27 Voest Alpine Ag Schraemmaschine
DE3146479A1 (de) * 1981-11-24 1983-06-01 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Pendelfoerderer, insbesondere fuer den einsatz in erzgewinnungsbetrieben
DE3222246A1 (de) * 1982-06-12 1983-12-15 Ruhrkohle Ag, 4300 Essen Hydraulische blaswand
AT374564B (de) * 1982-07-05 1984-05-10 Voest Alpine Ag Verfahren und einrichtung zum vortrieb von strecken und tunnels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE922529C (de) * 1952-03-02 1955-01-17 F W Moll Soehne Verfahren und Vorrichtung zur Sicherung des Hangenden beim Auffahren von Strecken, insbesondere fuer den Rueckbau
DE1167291B (de) * 1959-02-20 1964-04-09 Herbert Gorgosch Streckendurchsenkmaschine
DE2008412B2 (de) * 1970-02-24 1976-06-24 Walzenschrämmaschine Gebr. Eickhoff, Maschinenfabrik u. Eisengießerei mbH, 4630 Bochum Walzenschraemmaschine
US4007966A (en) * 1975-12-29 1977-02-15 Atlantic Richfield Company Single-entry mining development system
DE3335098A1 (de) * 1983-09-28 1985-04-04 Klöckner-Becorit GmbH, 4620 Castrop-Rauxel Abbauverfahren fuer floezartige lagerstaetten

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GLÜCKAUF, Band 113, Nr. 19, 6. Oktober 1977, Seiten 945-946, Bochum; CARR "Mechanisierung der Arbeiten am Übergang Streb-Strecke im britischen Steinkohlenbergbau" *
GLÜCKAUF, Band 119, Nr. 7, April 1983, Seiten 324-330, Bochum; E.H. HENKEL "Vergleich mechanisierter Aufhauentechniken" *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881358A1 (fr) * 1997-05-28 1998-12-02 TAMROCK VOEST-ALPINE Bergtechnik Gesellschaft m.b.H. Dispositif pour élargir des espaces creux
WO2015161833A1 (fr) * 2014-04-25 2015-10-29 缪协兴 Procédé de conception et d'optimisation de support hydraulique pour une exploitation minière utilisant des remblais solides
WO2019140813A1 (fr) * 2018-01-18 2019-07-25 山东科技大学 Procédé de formation de galerie par élargissement de galerie et creusement de tunnel et comblement par coulis de gangue dans une veine de charbon épaisse
CN113404498A (zh) * 2021-06-18 2021-09-17 安徽金日晟矿业有限责任公司 一种采用新型爆破方式的vcr采矿方法
CN113404498B (zh) * 2021-06-18 2024-01-05 安徽金日晟矿业有限责任公司 一种vcr采矿方法

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DE3629364A1 (de) 1988-03-10

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