US3631681A - Mine roof-supporting means - Google Patents

Mine roof-supporting means Download PDF

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Publication number
US3631681A
US3631681A US872684A US3631681DA US3631681A US 3631681 A US3631681 A US 3631681A US 872684 A US872684 A US 872684A US 3631681D A US3631681D A US 3631681DA US 3631681 A US3631681 A US 3631681A
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United States
Prior art keywords
piston
support
cylinder
valve
roof
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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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US872684A
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English (en)
Inventor
Laurence William Taylor
Frank Town
Emil Omiotek
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WE&F Dobson Ltd
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Dobson Ltd W E & F
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Publication date
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Publication of US3631681A publication Critical patent/US3631681A/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0069—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices without essential advancing shifting devices

Definitions

  • the side guide means is rendered operative for guiding [52] US. Cl 61/45 D, one of the supports relative to the other when one of the sup 248/357 ports is in roof supporting condition hydraulically and is acting [51] Int. Cl E2ld 15/44 as an anchorage support, and the other support is in nonroof [50] Field of 61/45.2; supporting condition and is hydraulically being displaced relative to the anchorage support.
  • This invention is for improvements in or relating to mine roof support means comprising an extensible and contractable support adjustable between an extended roof supporting condition and a contracted condition in which it is advanceable from a rear to a forward position relative to an adjacent support.
  • the supports are arranged to lean one on another, and taper slides or runners between successive supports are provided for easing the relative advance movements.
  • An object of the invention is to provide mine roof support means in such improved manner as to avoid the said disadvantages.
  • the invention provides mine roof support means comprising a support adapted to be brought into roof-supporting and nonroof-supporting conditions, and side guide means mounted on the support and adapted for being rendered operative and inoperative when required.
  • the support means conveniently includes control means for controlling the side guide means to become operative and inoperative when required.
  • the support means includes an adjacent support adapted to be brought into roof-supporting and nonroof-supporting conditions, and said control means is adapted for controlling the side guide means to become operative and act as a guide between the two supports when one of them is in nonroof-supporting condition and is being displaced relative to the other support in roof-supporting condition and acting as an anchorage.
  • the side guide means conveniently comprises a guide member and a piston and cylinder device adapted for rendering the guide member operative and inoperative.
  • the support means conveniently includes main hydraulic means for operating each support, auxiliary hydraulic means for operating the side guide means, and a sequence control device for controlling operation of the auxiliary hydraulic means in suitable operational relationship with operafion of the main hydraulic means.
  • the side guide member is a guide bar carried by a plurality of hydraulic jacks to extend horizontally at a location at the side of a rear part of the support and at a height substantially midway of the extended height of the support.
  • the support frame has vertical sideplates, and there are two spaced hydraulic jacks mounted in one of the sideplates and carrying the side guide bar.
  • the main hydraulic means includes a main control valve operable to pass pressure fluid to the auxiliary hydraulic means which displaces the side guide means into its projected position prior to operau'on of the main hydraulic means to release the support from the roof; the latter operation is followed, under control of the main control valve, by
  • the main control valve may embody handle-controlled disc valves, or it may be pilot fluid controlled or solenoid controlled from adjacent supports or from a remote location, so that a plurality of the supports can be operated in required sequential manner.
  • the sequence control device conveniently comprises a valve block, a valve controlled right angle throughway passage for connection between the main control valve and the support, and a valve-controlled transverse throughway passage for connection between the main control valve and the hydraulic jacks for the side guide member.
  • FIG. 1 is a general rear view of an inclined mining seam hav ing a row of roof supports.
  • FIG. 2 is a plan view of the roof supports.
  • FIG. 3 is a similar view to FIG. 2 at a second stage.
  • FIG. 4 is a similar view to FIG. 2 at a third stage.
  • FIG. 5 is a similar view to FIG. 2 at a fourth stage.
  • FIG. 6 is a similar view to FIG. 2 at a fifth stage.
  • FIG. 7 is a part perspective and part sectional view of one of the supports and control valve means therefor.
  • FIG. 8 is a similar view to FIG. 3 with the valve means at a different stage.
  • FIG. 9 is a similar view to FIG. 3 with the valve means at a further different stage.
  • the inclined mining seam l is comparatively steep and it will be seen that there is provided in the seam a row of roof supports. All the supports are identical and hereinafter where the context so pemiits, particular reference to one support 2 will apply equally to each other support, like parts being given like reference numerals raised to first and second degrees.
  • the support 2 which is of extensible, contractable and stepwise advanceable kind, is so disposed that when not extended to the roof it could, in the absence of special means provided, either slip down the seam or tip over.
  • a frame 3 of the support 2 has a sideplate 4 on which are mounted two spaced hydraulic jacks, 5, 6, FIG. 2, carrying a side guide bar 7. These jacks 5, 6 carry the side guide bar 7 to extend longitudinally of the support 2 at the side of a rear part of the support and at a height, FIG. 1, substantially midway of the height of the extended support.
  • the support 2 also has an opposite side frame plate 8.
  • main and auxiliary hydraulic means By the use of main and auxiliary hydraulic means, to be hereinafter fully described, and starting with the support 2 in the rear roof-supporting position, FIG. 2, and with the side guide bar 7 retracted, as shown, the next operation of the support 2 is to be released from the roof. However before this happens, the two hydraulic jacks, 5, 6 are extended so that the guide bar 7 then bears against the frame 8' of the support 2, FIG. 3. This is followed by the support 2 being released from the roof, and, while maintaining the side guide bar 7 bearing against the plate 8, the support 2 is advanced, FIG. 4, to its forward position, FIG. 5. The next operation of the support 2 is to be reset to the roof, and when a required roof-supporting pressure has been attained, the side guide bar 7 is retracted, FIG.
  • each support has a plurality of hydraulic props 9, FIG. 7, said frame 3, an advancing hydraulic jack 10, said hydraulicjacks 5, 6 and said guide bar 7.
  • Such a support will usually have a main control valve 11 which is usually controlled by two handles, one which rotates a disc valve 12 for extending and retracting the hydraulic props 9, and the other of which rotates a disc valve 13 for extending and contracting the advancing hydraulic jack which is for connection to a conveyor 14, FIG. 2.
  • part 15 of the valve II which embodies the disc valves l2, 13 together with the handles, can be removed and replaced by alternative control means for pilot fluid control or solenoid valve control, from adjacent supports or from a remote location, in desired sequential manner, substantially as disclosed in our Pat. No. (application No. 38088165) to which reference is directed for full details.
  • the support is released from the roof a few inches by moving one of the handles to rotate the valve disc 12 and to depress a dead mans handle button 16 usually employed in the valve.
  • This provides for pressure fluid to pass from the feed 18, FIG. 9 through a valve 19 opened by the button 16 and through a duct 20 in the disc valve 12 to a line L1 which leads to the annulus ends of the hydraulic props 9 for their release from the roof.
  • This release can be halted by moving the valve handle to a neutral position, FIG. 7, where the disc valve 12 cuts off the feed to the hydraulic props.
  • the support is then advanced by moving the other valve handle to rotate the disc valve 13 into a posi tion FIG.
  • control valve 11 For use in steep seams, as hereinbefore described with reference to FIGS. 1 to 6, the control valve 11 has associated with it a sequence control valve 23, FIGS. 7 to 9.
  • This valve has a throughway passage 24 controlled by a spring pressed conical valve 25, 25a, and a transverse passage 26 controlled by a nonreturn ball valve 27 controlled by a piston 28.
  • the passage 24 is connected by the aforesaid line L1 to the control valve 11, the other end of the passage 24 is connected by line L2 to the annulus end of the hydraulic jacks 9, one end of the transverse passage 26 is connected by line L3 to the control valve 11 and is also connected by line L4 to the annulus ends of the hydraulic jacks 5, 6, and the other end of the transverse passage 26 is connected by line L5 to the piston ends of the hydraulic jacks 5, 6.
  • the line L2 is also connected by a return line L6 to the control valve 11.
  • the conical valve 25 When a desired stabilizing pressure is attained, for example of the order of 750 p.s.i., the conical valve 25 will be opened by the fluid thereby allowing fluid to pass via the line L2 to the line L6 whereby a piston 29 of the main control valve is operated to open a nonreturn ball valve 30 whereby the piston ends of the hydraulic props 9 are opened to a return passage 31 of the main control valve.
  • Pressure fluid in the line L2 will also pass to the annulus ends of the hydraulic props 9 which will consequently contract to release the support from the roof. Pressure may fall in the passage 24 of the sequence valve but pressure will be held in the hydraulicjacks 5, 6 by virtue of the nonreturn ball valve 27.
  • the pressure fluid passing to the piston ends of the hydraulic props 9 is also fed to the annulus ends of the hydraulic jacks 5, 6 via the lines L3 and L4, but the hydraulic jacks S, 6 will remain extended until a desired pressure is built up in the hydraulic props 9, sufficient to hold the support positively thrust against the roof, by virtue of the fact that the ball valve 27 temporarily prevents return to fluid from the piston ends of the hydraulic jacks S, 6.
  • a self-advancing hydraulic mine longwall and roof sup port system in combination with a conveyor comprising a plurality of interconnected and laterally spaced self-advancing piston and cylinder roof support assemblies, each having a sidewall piston and cylinder lateral side guiding devices carried by said piston and cylinder roof support assemblies, hydraulic spacing devices including a main hydraulic means between each of two adjacent roof-support assemblies and consisting of two cylinder-piston units at two spaced points on the sidewalls of one roof support assembly, auxiliary hydraulic means for operating said side guide devices acting in lengthwise direction of the longwall face, a slide rail attached to the pistons and bearing against the facing sidewall of the adjacent roof support assembly, main control valve means in said main hydraulic means operably associated with said piston and cylinder roof support assemblies for controlling the advance and resetting of each roof support assembly in respect of their setting, release and advancement, a sequence control valve in said auxiliary hydraulic means comprising a valve block and a right angle communicating throughway passage for operative connection between the main hydraulic means, said main control valve means and said support

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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)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Tents Or Canopies (AREA)
  • Fluid-Pressure Circuits (AREA)
US872684A 1968-11-02 1969-10-30 Mine roof-supporting means Expired - Lifetime US3631681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5203468 1968-11-02

Publications (1)

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US3631681A true US3631681A (en) 1972-01-04

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US872684A Expired - Lifetime US3631681A (en) 1968-11-02 1969-10-30 Mine roof-supporting means

Country Status (7)

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US (1) US3631681A (enrdf_load_stackoverflow)
JP (1) JPS4931162B1 (enrdf_load_stackoverflow)
AT (1) AT293310B (enrdf_load_stackoverflow)
DE (1) DE1954645A1 (enrdf_load_stackoverflow)
ES (1) ES373046A1 (enrdf_load_stackoverflow)
FR (1) FR2022469A1 (enrdf_load_stackoverflow)
GB (1) GB1289299A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220424A (en) * 1977-12-13 1980-09-02 Bochumer Eisenhutte Heintzmann Gmbh & Co. Valve arrangement for a walking mine roof support
US4586851A (en) * 1983-06-28 1986-05-06 Kloeckner-Becorit Gmbh Levelling ram for roof-shield mine support systems
US4679856A (en) * 1983-09-21 1987-07-14 Klockner-Becorit Gmbh Mine self-advancing roof support and method of relocating a mine winning face equipped with self-advancing roof support
US5584611A (en) * 1994-11-22 1996-12-17 Long-Airdox Roof support for underground excavations
US6422962B1 (en) * 2000-04-11 2002-07-23 Litens Automotive Partnership Timing belt tensioner with a backstop device with controlled one-way mechanism
US20060267395A1 (en) * 2002-12-17 2006-11-30 Willi Kussel Coal face support in a mine
CN103557015A (zh) * 2013-08-06 2014-02-05 四川华蓥山广能集团嘉华机械有限责任公司 多伸缩液压支架立柱

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164987A (en) * 1984-09-26 1986-04-03 Dowty Mining Equipment Ltd Mine roof supports

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1364412A (fr) * 1963-07-24 1964-06-19 Gewerk Eisenhuette Westfalia Soutènement hydraulique mobile utilisable au fond dans les mines
GB1079202A (en) * 1964-10-02 1967-08-16 Wild A G & Co Ltd Improvements in or relating to roof support units for mines and the like
US3362169A (en) * 1963-12-21 1968-01-09 Karl Maria Groetschel Roof supporting systems for mine workings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1364412A (fr) * 1963-07-24 1964-06-19 Gewerk Eisenhuette Westfalia Soutènement hydraulique mobile utilisable au fond dans les mines
US3362169A (en) * 1963-12-21 1968-01-09 Karl Maria Groetschel Roof supporting systems for mine workings
GB1079202A (en) * 1964-10-02 1967-08-16 Wild A G & Co Ltd Improvements in or relating to roof support units for mines and the like

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220424A (en) * 1977-12-13 1980-09-02 Bochumer Eisenhutte Heintzmann Gmbh & Co. Valve arrangement for a walking mine roof support
US4586851A (en) * 1983-06-28 1986-05-06 Kloeckner-Becorit Gmbh Levelling ram for roof-shield mine support systems
US4679856A (en) * 1983-09-21 1987-07-14 Klockner-Becorit Gmbh Mine self-advancing roof support and method of relocating a mine winning face equipped with self-advancing roof support
US5584611A (en) * 1994-11-22 1996-12-17 Long-Airdox Roof support for underground excavations
US6422962B1 (en) * 2000-04-11 2002-07-23 Litens Automotive Partnership Timing belt tensioner with a backstop device with controlled one-way mechanism
US20060267395A1 (en) * 2002-12-17 2006-11-30 Willi Kussel Coal face support in a mine
US7494190B2 (en) * 2002-12-17 2009-02-24 Tiefenbach Control Systems Gmbh Coal face support in a mine
CN103557015A (zh) * 2013-08-06 2014-02-05 四川华蓥山广能集团嘉华机械有限责任公司 多伸缩液压支架立柱

Also Published As

Publication number Publication date
ES373046A1 (es) 1971-12-01
AT293310B (de) 1971-10-11
GB1289299A (enrdf_load_stackoverflow) 1972-09-13
DE1954645A1 (de) 1970-05-06
JPS4931162B1 (enrdf_load_stackoverflow) 1974-08-20
FR2022469A1 (enrdf_load_stackoverflow) 1970-07-31

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