US2062686A - Rolled section for framing in mines and supporting structure for utilizing same - Google Patents
Rolled section for framing in mines and supporting structure for utilizing same Download PDFInfo
- Publication number
- US2062686A US2062686A US652523A US65252333A US2062686A US 2062686 A US2062686 A US 2062686A US 652523 A US652523 A US 652523A US 65252333 A US65252333 A US 65252333A US 2062686 A US2062686 A US 2062686A
- Authority
- US
- United States
- Prior art keywords
- section
- framing
- flanges
- rolled
- mines
- Prior art date
- 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
Links
- 238000009432 framing Methods 0.000 title description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 229910052742 iron Inorganic materials 0.000 description 14
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 235000000396 iron Nutrition 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002089 crippling effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/20—Special cross- sections, e.g. corrugated
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/183—Supporting means for arch members, not provided for in E21D11/22
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/28—Longitudinal struts, i.e. longitudinal connections between adjoining arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
Definitions
- the object of the invention is an open channel-shaped rolled section for iron framing in mines and also the supporting structure for its use.
- the invention is based on the knowledge that in pit workings, in contrast to superstructures, the supporting members are frequently stressed beyond their elastic limit and therefore the question of bending out of shape must be taken into account. Moreover, as in mining it is often not only a question of purely vertical pressures but of lateral pressure components acting at the same time, the stress acts in all directions of the cross-section of the section iron, so that not only the resistance of the supporting member against vertical pressure but also the lateral moments of resistance and moments of inertia are of importance.
- the sections used heretofore in pit framing often collapse for the reasons stated about the weak yy axis shown on the drawings forming part of this application. This is a considerable drawback, because it renders it difiicult to adopt the usual methods of re-straightening the sections.
- the pit framing section the form of a trough iron.
- the section according to the invention is given resisting moments and moments of inertia which are equal or approximately equal with respect to both axes.
- the rolled section according to the invention may be of such a profile that the moment of resistance and inertia according to the y-y axis is even greater than the moment of resistance and moment of inertia with reference to the :n-a: axis shown on the drawings, this being obtainable by but a slight extra expenditure of material.
- the rolled section according to the invention is so proportioned that the cross-sectional areas of the flanges or booms are equal or approximately equal, so that the neutral axis of the section lies in the centeror approximately in the center between the two flanges.
- the two bottom flange surfaces which, in order to obtain the maximum of resisting moment with the smallest amount of material must be half as long and of the same thickness as the top flange, may be shorter and thicker but equal or approximately equal in area to the top flange.
- the profile according to the invention is so pro"- portioned that the sum of the bottom flange faces is greater than the upper flange area.
- the entire profile can be 50' extended that the moment of resistance and inertia with reference to the 11-11 axis is many times the moment of resistance and inertia with reference to the :cm axis, this being easily attainable by a slight extra expenditure of material in the flanges.
- the corner curves where the webs run into the flanges are of gradual shape and are preferably in the form or substantially in the form of a cubic parabola.
- the form of the cubic parabola is determined for example by the bounding lines of the moment areas which would result from loading the various portions of the profile (flanges and webs) after the manner of a beam fixed at one end.
- the straight webs of the section are at an angle just slightly in excess of degrees, with respect to the flanges.
- the resistance to bending may be increased by stiffening the section at various places in its open side by fiat irons, plates or similar members imparting rigidity.
- trough-irons and similar channel-shaped rolled sections may be used for any purpose in pit framing, such as lagging, cap or cornice pieces, stretchers, props, stanchions, polygonal and arched roof supports.
- pit framing such as lagging, cap or cornice pieces, stretchers, props, stanchions, polygonal and arched roof supports.
- the advantages of the invention are felt in connection with circular structures, horse-shoe shaped arches and polygonal framing.
- arched framing two ends of the sections are joined together by fitting one over the other.
- the invention also contemplates the provision of various forms of pit framing whereby the advantages of the section according to the invention can be utilized to the full.
- the invention proposes to reinforce the supporting structure by fitting special reinforcing members over the frame profile.
- the advantages of the section according to the invention may be effectively increased still further by arranging tension members between the ends of the arched cap or inside the arched frame, so that the resistance in vertical direction is multiplied.
- These tension members may consist of fiat irons, round sections, hoop iron or sections of any profile and may be adjustable in length. Preferably, their length is such that they only come into effect after the roofing material has experienced a certain deflection.
- Figures 1 to 6 show some forms of trough iron sections such as are used according to the proposal of the present invention for pit roof supports, whilst Figs. 7 to 13 illustrate various practical examples of the applications of the rolled section according to the invention.
- Figure 1 shows a trough-iron section with arched webs I while in Figs. 2 to 6, the webs are straight.
- the bottom flanges 2 are equal in total length and in area to the top flange or bridge-work area 3, so that the resisting moment with reference to the a::c axis is a maximum with regard to the vertical stress.
- the bottom flanges 2 are shorter and thicker but the area is equal to that of the upper flange or bridge-work area 3.
- the flanges 2 and 3 form with respect to the straight webs I, angles on and B which are just slightly greater than 90 degrees. This reduces the amount of leverage a, so that the section is able to offer a greater resistance to expanding or spreading.
- the corner curves between the flanges 2 and 3 and the webs I run out gradually preferably according to a cubic parabola.
- Figure 5 shows a section which is highly suited for taking up lateral stresses.
- Fig. 6 shows the union of two trough-iron sections 4 and 5 to form a box girder.
- Figures '7 and 8 show the use of the rolled section in gallery framing.
- the open channel of the cap or cornice 6, which in Fig. 8 has an arched shape there are fixed transverse members I which limit the thrust of the props 8.
- abutment members 9 whereby the cap 6 is firmly wedged against the wall-face.
- This abutment 9 may consist of section iron, double T-iron, U-iron or trough-iron.
- ] are arranged inside the ring [9- at places of highest pressure.
- These tension members 28 may function at the same time as compression struts by making them of suitable section iron. The idea may likewise be applied to horse-shoe arches.
- Figs. 10 to 12 show the application of the rolled section according to the invention to arched pit framing.
- the arch 2! is reinforced at the points of intense pressure by providing special members 22.
- the tying of the arch is brought about either by fitting a channel-shaped. section member 23 over it, or as shown in Fig. 11, by pushing the two adjacent ends 24 and 25 of the section over each other.
- the section-iron may be arranged either with the channel towards the inside of the gallery, as shown at the left-hand side, or with the channel outside, as indicated at the right-hand side.
- the right-hand construction has the advantage that it offers small resistance to the air draught.
- 21 and 28 denote fiat bars and plates respectively which are inserted in the section and serve for stiffening.
- the flat bars 21 and plates 28 may be inserted individually or jointly in the section, according to conditions or to the desired degree of stiffening, Fig. 12 showing both members applied to a single section.
- these stiffening means are applicable to all examples previously shown and described.
- 29 denotes a stay which may rest either directly on the lower flanges of the section or, as shown at the right-hand side, may rest on specially fitted parts 3! to reinforce the frames relative to one another.
- Fig. 13 illustrates an example of the application of the invention to polygonal framing.
- denotes the polygon stempel.
- the long stempel 32 is provided with a tension member 33 which, in conjunction with the section iron 34 acts as a strut frame just as in the example according to Fig. 9.
- a rolled ferrous mine frame-member comprising a symmetrical body portion, trough-like in cross-section, provided with laterally extending flanges, said flanges being equal in cross-sectional area and having a total cross-sectional area equal to that of the bridge-work area.
- a rolled ferrous mine frame-member comprising a symmetrical body portion, trough-like in cross-section, provided with laterally extending flanges, said flanges being thicker than and their cross-sectional length less than that of said body portion, but their total cross-sectional area equal to that of the body portion.
- a rolled ferrous mine frame-member for forming self-contained circular and archedmine frames comprising a symmetrical body portion, trough-like or U-shaped in cross-section, provided with laterally extending flanges, said frames being formed of a plurality of said members having body portions of equivalent static values and forming butt-joints with their ends, said joints being bridged and reinforced by anequivalent section member possessing a trough-like or U- shaped cross-section and adhering with its sides to the sides of the members embraced by it.
- a rolled ferrous mine frame-member comprising a symmetrical body portion, trough-like in cross-section, provided with lateral flanges, said flanges being equal in cross-sectional area and having a total cross-sectional area greater than that of the bridge-work area.
- a rolled ferrous mine frame-member comprising a symmetrical body portion, trough-like in cross-section, provided with laterally extending flanges, said flanges being equal in crosssectional area and having a total cross-sectional area at least equal to that of the bridgework, the sides of said body portion forming webs running into the bridge-work and said lateral flanges in curved corners shaped like a cubic parabola and increasing in thickness approximately from the center of the webs towards the bridgework and the lateral flanges.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Description
Dw 1936. H. ToussAlN 2,062,686
. ROLLED SECTION FOR FRAMING INES AND SUPPORTING STRUC E FOR ING SAME Filed 2 Sheets-Sheet l UTI 1 n. 19, 1935 Dec. 1, 1936. H; ToussAlN'i' ROLLED SECTION FOR FRAMING IN MINES AND Filed Jan. 19, 1933 M4 fm Patented Dec. 1, 1936 UNITED STATES ROLLED SECTION FOR FRAIVIING IN MINES AND SUPPORTING STRUCTURE FOR UTI- LIZlING SAME Heinrich Toussaint, Berlin-Lankwitz, Germany Application January 19, 1933, Serial No. 652,523 In Germany January 22, 1932 5 Claims.
The object of the invention is an open channel-shaped rolled section for iron framing in mines and also the supporting structure for its use.
The invention is based on the knowledge that in pit workings, in contrast to superstructures, the supporting members are frequently stressed beyond their elastic limit and therefore the question of bending out of shape must be taken into account. Moreover, as in mining it is often not only a question of purely vertical pressures but of lateral pressure components acting at the same time, the stress acts in all directions of the cross-section of the section iron, so that not only the resistance of the supporting member against vertical pressure but also the lateral moments of resistance and moments of inertia are of importance. The sections used heretofore in pit framing often collapse for the reasons stated about the weak yy axis shown on the drawings forming part of this application. This is a considerable drawback, because it renders it difiicult to adopt the usual methods of re-straightening the sections.
According to the present invention, these drawbacks are overcome by giving the pit framing section the form of a trough iron. In order to insure a large resistance in the vertical direction and at the same time a large resistance to vertical crippling, the section according to the invention is given resisting moments and moments of inertia which are equal or approximately equal with respect to both axes. In order to preclude the tendency to laterally collapse which, as already mentioned, makes the straightening of the section much more difficult, the rolled section according to the invention may be of such a profile that the moment of resistance and inertia according to the y-y axis is even greater than the moment of resistance and moment of inertia with reference to the :n-a: axis shown on the drawings, this being obtainable by but a slight extra expenditure of material. Specifically, the rolled section according to the invention is so proportioned that the cross-sectional areas of the flanges or booms are equal or approximately equal, so that the neutral axis of the section lies in the centeror approximately in the center between the two flanges. On the other hand, the two bottom flange surfaces which, in order to obtain the maximum of resisting moment with the smallest amount of material must be half as long and of the same thickness as the top flange, may be shorter and thicker but equal or approximately equal in area to the top flange. Thus, restraightening and in fact the bending of the section at all into an arched or curved shape becomes considerably easier. In cases like arched framings and curved cap pieces where, in order to obtain the most favorable arched shape from a static point of view, a higher moment of inertia is desirable towards the side, the profile according to the invention is so pro"- portioned that the sum of the bottom flange faces is greater than the upper flange area. Further the entire profile can be 50' extended that the moment of resistance and inertia with reference to the 11-11 axis is many times the moment of resistance and inertia with reference to the :cm axis, this being easily attainable by a slight extra expenditure of material in the flanges. In order to impart to the section a greater resistance to bending and to spreading apart, according to the invention the corner curves where the webs run into the flanges are of gradual shape and are preferably in the form or substantially in the form of a cubic parabola. The form of the cubic parabola is determined for example by the bounding lines of the moment areas which would result from loading the various portions of the profile (flanges and webs) after the manner of a beam fixed at one end. Preferably, the straight webs of the section are at an angle just slightly in excess of degrees, with respect to the flanges. Further, the resistance to bending may be increased by stiffening the section at various places in its open side by fiat irons, plates or similar members imparting rigidity.
According to the invention, trough-irons and similar channel-shaped rolled sections may be used for any purpose in pit framing, such as lagging, cap or cornice pieces, stretchers, props, stanchions, polygonal and arched roof supports. In particular, the advantages of the invention are felt in connection with circular structures, horse-shoe shaped arches and polygonal framing. In arched framing two ends of the sections are joined together by fitting one over the other.
The invention also contemplates the provision of various forms of pit framing whereby the advantages of the section according to the invention can be utilized to the full. Thus for example, the invention proposes to reinforce the supporting structure by fitting special reinforcing members over the frame profile. The advantages of the section according to the invention may be effectively increased still further by arranging tension members between the ends of the arched cap or inside the arched frame, so that the resistance in vertical direction is multiplied. These tension members may consist of fiat irons, round sections, hoop iron or sections of any profile and may be adjustable in length. Preferably, their length is such that they only come into effect after the roofing material has experienced a certain deflection. Thus the increase of stability produced by the tension members only comes into effect when the pressure of the earth has commenced to act to a certain extent upon the roof. Finally, the invention provides various other structures for supporting pit roofs, and these will be clearer by referring to the accompanying drawings in conjunction with the explanatory text.
In the drawings, Figures 1 to 6 show some forms of trough iron sections such as are used according to the proposal of the present invention for pit roof supports, whilst Figs. 7 to 13 illustrate various practical examples of the applications of the rolled section according to the invention.
Figure 1 shows a trough-iron section with arched webs I while in Figs. 2 to 6, the webs are straight.
In the shape according to Figs. 1 and 2, the bottom flanges 2 are equal in total length and in area to the top flange or bridge-work area 3, so that the resisting moment with reference to the a::c axis is a maximum with regard to the vertical stress.
In the shape according to Fig. 3, the bottom flanges 2 are shorter and thicker but the area is equal to that of the upper flange or bridge-work area 3.
As will be seen from the shapes according to Figs. 4 and 5, the flanges 2 and 3 form with respect to the straight webs I, angles on and B which are just slightly greater than 90 degrees. This reduces the amount of leverage a, so that the section is able to offer a greater resistance to expanding or spreading. At the same time the corner curves between the flanges 2 and 3 and the webs I run out gradually preferably according to a cubic parabola. Figure 5 shows a section which is highly suited for taking up lateral stresses.
Fig. 6 shows the union of two trough-iron sections 4 and 5 to form a box girder.
Figures '7 and 8 show the use of the rolled section in gallery framing. In the open channel of the cap or cornice 6, which in Fig. 8 has an arched shape, there are fixed transverse members I which limit the thrust of the props 8. In Fig. 8, there are shown abutment members 9 whereby the cap 6 is firmly wedged against the wall-face. This abutment 9 may consist of section iron, double T-iron, U-iron or trough-iron.
In Fig. 9, the tension members 2|] are arranged inside the ring [9- at places of highest pressure. These tension members 28 may function at the same time as compression struts by making them of suitable section iron. The idea may likewise be applied to horse-shoe arches.
Figs. 10 to 12 show the application of the rolled section according to the invention to arched pit framing. The arch 2! is reinforced at the points of intense pressure by providing special members 22. The tying of the arch is brought about either by fitting a channel-shaped. section member 23 over it, or as shown in Fig. 11, by pushing the two adjacent ends 24 and 25 of the section over each other.
As illustrated in Fig. 12, the section-iron may be arranged either with the channel towards the inside of the gallery, as shown at the left-hand side, or with the channel outside, as indicated at the right-hand side. As indicated by the line 26 representing the air current, the right-hand construction has the advantage that it offers small resistance to the air draught. 21 and 28 denote fiat bars and plates respectively which are inserted in the section and serve for stiffening. The flat bars 21 and plates 28 may be inserted individually or jointly in the section, according to conditions or to the desired degree of stiffening, Fig. 12 showing both members applied to a single section. Of course, these stiffening means are applicable to all examples previously shown and described. 29 denotes a stay which may rest either directly on the lower flanges of the section or, as shown at the right-hand side, may rest on specially fitted parts 3!! to reinforce the frames relative to one another.
Fig. 13 illustrates an example of the application of the invention to polygonal framing. 3| denotes the polygon stempel. The long stempel 32 is provided with a tension member 33 which, in conjunction with the section iron 34 acts as a strut frame just as in the example according to Fig. 9.
I claim:
1. A rolled ferrous mine frame-member, comprising a symmetrical body portion, trough-like in cross-section, provided with laterally extending flanges, said flanges being equal in cross-sectional area and having a total cross-sectional area equal to that of the bridge-work area.
2. A rolled ferrous mine frame-member, comprising a symmetrical body portion, trough-like in cross-section, provided with laterally extending flanges, said flanges being thicker than and their cross-sectional length less than that of said body portion, but their total cross-sectional area equal to that of the body portion.
3. A rolled ferrous mine frame-member for forming self-contained circular and archedmine frames, comprising a symmetrical body portion, trough-like or U-shaped in cross-section, provided with laterally extending flanges, said frames being formed of a plurality of said members having body portions of equivalent static values and forming butt-joints with their ends, said joints being bridged and reinforced by anequivalent section member possessing a trough-like or U- shaped cross-section and adhering with its sides to the sides of the members embraced by it.
4. A rolled ferrous mine frame-member, comprising a symmetrical body portion, trough-like in cross-section, provided with lateral flanges, said flanges being equal in cross-sectional area and having a total cross-sectional area greater than that of the bridge-work area.
5. A rolled ferrous mine frame-member, comprising a symmetrical body portion, trough-like in cross-section, provided with laterally extending flanges, said flanges being equal in crosssectional area and having a total cross-sectional area at least equal to that of the bridgework, the sides of said body portion forming webs running into the bridge-work and said lateral flanges in curved corners shaped like a cubic parabola and increasing in thickness approximately from the center of the webs towards the bridgework and the lateral flanges.
HEINRICH TOUSSAINT.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2062686X | 1932-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2062686A true US2062686A (en) | 1936-12-01 |
Family
ID=7983160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US652523A Expired - Lifetime US2062686A (en) | 1932-01-22 | 1933-01-19 | Rolled section for framing in mines and supporting structure for utilizing same |
Country Status (3)
Country | Link |
---|---|
US (1) | US2062686A (en) |
BE (1) | BE391990A (en) |
FR (1) | FR744767A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741147C (en) * | 1939-01-29 | 1943-11-05 | Karl Leh | Iron beam for hiking pillar |
US2713774A (en) * | 1948-08-24 | 1955-07-26 | Bochumer Eisen Heintzmann | Supporting frame, especially mine supports |
US3022028A (en) * | 1954-06-11 | 1962-02-20 | Tumpane Company Of Georgia Inc | Knockdown platform |
US3067844A (en) * | 1953-03-31 | 1962-12-11 | Hunnebeck Emil Mauritz | Network of single rods welded together at their junctions |
US3108663A (en) * | 1959-09-10 | 1963-10-29 | Reynolds Metals Co | Extrusion construction |
US3312034A (en) * | 1964-03-06 | 1967-04-04 | Pollak Steel Company | Sign support post |
DE3017428A1 (en) * | 1980-05-07 | 1981-11-12 | Gesteins- Und Tiefbau Gmbh, 4350 Recklinghausen | Mine gallery or tunnel composite support system - has stretched filled textile support tubes lying full face against steel segments |
FR2509786A1 (en) * | 1981-07-14 | 1983-01-21 | Bochumer Eisen Heintzmann | ELEMENT FOR THE SUPPORT OF UNDERGROUND GALLERIES |
EP0439198A1 (en) * | 1990-01-25 | 1991-07-31 | British Steel plc | Underground support arch |
US6524722B2 (en) | 2001-03-15 | 2003-02-25 | Contech Technologies, Inc. | Corrugated structural metal plate |
CN106930779A (en) * | 2017-03-15 | 2017-07-07 | 河南理工大学 | A kind of special-shaped canopy method for protecting support of micro- arch of high-dipping three soft coal layer re-exploration laneway battered leg |
CN113530569A (en) * | 2021-06-23 | 2021-10-22 | 中交二公局第四工程有限公司 | Construction method for two linings of horn mouth of underground excavation tunnel |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE745114C (en) * | 1938-09-16 | 1944-02-26 | Georg Bachmann | Iron mine support |
DE964403C (en) * | 1950-07-15 | 1957-06-06 | Rheinpreussen Ag | Expansion of mining routes by breaking out the height of the route |
-
1932
- 1932-10-29 FR FR744767D patent/FR744767A/fr not_active Expired
- 1932-10-31 BE BE391990A patent/BE391990A/fr unknown
-
1933
- 1933-01-19 US US652523A patent/US2062686A/en not_active Expired - Lifetime
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741147C (en) * | 1939-01-29 | 1943-11-05 | Karl Leh | Iron beam for hiking pillar |
US2713774A (en) * | 1948-08-24 | 1955-07-26 | Bochumer Eisen Heintzmann | Supporting frame, especially mine supports |
US3067844A (en) * | 1953-03-31 | 1962-12-11 | Hunnebeck Emil Mauritz | Network of single rods welded together at their junctions |
US3022028A (en) * | 1954-06-11 | 1962-02-20 | Tumpane Company Of Georgia Inc | Knockdown platform |
US3108663A (en) * | 1959-09-10 | 1963-10-29 | Reynolds Metals Co | Extrusion construction |
US3312034A (en) * | 1964-03-06 | 1967-04-04 | Pollak Steel Company | Sign support post |
DE3017428A1 (en) * | 1980-05-07 | 1981-11-12 | Gesteins- Und Tiefbau Gmbh, 4350 Recklinghausen | Mine gallery or tunnel composite support system - has stretched filled textile support tubes lying full face against steel segments |
FR2509786A1 (en) * | 1981-07-14 | 1983-01-21 | Bochumer Eisen Heintzmann | ELEMENT FOR THE SUPPORT OF UNDERGROUND GALLERIES |
US4465404A (en) * | 1981-07-14 | 1984-08-14 | Bochumer Eisenhuette Heintzmann Gmbh & Co Kg | Wall element for an underground gallery |
EP0439198A1 (en) * | 1990-01-25 | 1991-07-31 | British Steel plc | Underground support arch |
US6524722B2 (en) | 2001-03-15 | 2003-02-25 | Contech Technologies, Inc. | Corrugated structural metal plate |
CN106930779A (en) * | 2017-03-15 | 2017-07-07 | 河南理工大学 | A kind of special-shaped canopy method for protecting support of micro- arch of high-dipping three soft coal layer re-exploration laneway battered leg |
CN106930779B (en) * | 2017-03-15 | 2019-07-30 | 河南理工大学 | A kind of special-shaped canopy method for protecting support of the micro- arch of high-dipping three soft coal layer re-exploration laneway battered leg |
CN113530569A (en) * | 2021-06-23 | 2021-10-22 | 中交二公局第四工程有限公司 | Construction method for two linings of horn mouth of underground excavation tunnel |
Also Published As
Publication number | Publication date |
---|---|
BE391990A (en) | 1932-11-30 |
FR744767A (en) | 1933-04-26 |
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