CN110295923B - Supporting device and supporting method for stoping of underground pillar filling method of metal mine - Google Patents
Supporting device and supporting method for stoping of underground pillar filling method of metal mine Download PDFInfo
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- CN110295923B CN110295923B CN201910747035.4A CN201910747035A CN110295923B CN 110295923 B CN110295923 B CN 110295923B CN 201910747035 A CN201910747035 A CN 201910747035A CN 110295923 B CN110295923 B CN 110295923B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/34—Joints between vertical props and horizontal top bars
Abstract
The invention discloses a supporting device and a supporting method for stoping of a pillar filling method under a metal mine. The supporting device comprises a transverse steel beam, two sections of vertical long steel beams which are respectively connected below the left end and the right end of the transverse steel beam through short bolts, two sections of vertical short steel beams which are respectively connected to the inner side surfaces of the lower parts of the two sections of vertical long steel beams through short bolts, and two inclined steel beams which are connected between the transverse steel beam and the two vertical long steel beams. The method of supporting includes the steps of preparing the supporting material and transporting the prepared supporting material to the stope for lapping. The invention can realize the rapid and effective support of the goaf roof, greatly improves the safety and efficiency of the stud extraction operation, and has wide application prospect. The invention has the advantages of convenient disassembly and assembly, good supporting effect, high construction efficiency, adjustable length and strong adaptability of ore body thickness, and can meet the requirement of safe recovery of the upward filling method of the remained ore pillar among the tailing filling bodies in the metal mine.
Description
Technical Field
The invention relates to the field of metal mine pillar stoping support, in particular to a support device and a support method for metal mine underground pillar filling stoping.
Background
In China, many metal mines have been mined for more than 30 years. The empty field method and the ore retention method which are commonly adopted in the past and are extracted in two steps leave ore pillars, and the filling method which is widely applied in recent years also leaves ore pillars in the exploitation of thick and large ore bodies. Mines such as these, which use two steps of stoping, have problems with pillar stoping to varying degrees. One important link in the pillar extraction process is stope supporting work, and whether the supporting process is good or bad and the supporting efficiency is high or not is related to the safety and the high efficiency of pillar extraction. The quick, convenient, safe and effective supporting mode can ensure the safety of workers on the working face in the mining process of the ore pillar, and can also improve the mining efficiency of the ore pillar, thereby contributing to improving the economic benefit of mines.
In a general mine, for example, a limited company of gold mining in a red-peak bupleurum hurdle, a shallow hole ore retention method is used in the past for mining in the third to sixth middle sections of No. 2 wells in a north mining area of a mining area, so that some top and bottom ore pillars and ore room pillar ore resources with higher grade are left, and when the part of high-grade ore pillar resources are mined by an upward horizontal layered filling mining method in the later stage, the supporting working procedures of an anchor rod penetrating supporting mode commonly used in the mine are complicated, and the safety of a mining operation space of the ore pillar is difficult to ensure. Therefore, there is a need in the prior art for a removable roof support device for stoping of a pillar filling method under a metal mine, so as to realize rapid and effective support of a goaf roof and ensure operation safety of subsequent stoping procedures such as ore removal under a stope roof.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a supporting device for stoping of a pillar filling method under a metal mine, so that a goaf roof can be quickly and effectively supported, the safety of workers on a working face is ensured, and the working efficiency is improved.
The first object of the invention is achieved by the following technical scheme: the utility model provides a strutting arrangement for pillar filling method stope under metal mine, includes by left and right sides horizontal girder steel and the horizontal girder steel that constitutes of middle part horizontal girder steel between these left and right sides horizontal girder steel through short bolt connection, through short bolt respectively connect in two sections perpendicular girder steel of the left and right sides below of horizontal girder steel, connect respectively in two sections perpendicular short girder steel of two sections perpendicular girder steel lower part medial surfaces and connect two oblique girder steel between horizontal girder steel and two perpendicular girder steel through short bolt, the lower tip of oblique girder steel support in on the perpendicular short girder steel, the lower tip of oblique girder steel with perpendicular girder steel passes through long bolt and nut connection, the horizontal girder steel of side is provided with vertical girder steel connecting hole, and the pole portion of a long bolt passes girder steel connecting hole downwardly extending to the below of side horizontal girder steel, the upper end overlap joint of oblique girder steel is in the pole portion of this long bolt, and the pole portion of this long bolt is connected with the nut in the below of oblique girder steel and this long bolt contact position.
The side transverse steel beam is uniformly provided with a plurality of steel beam connecting holes for penetrating long bolts.
The top of the vertical long steel beam is fixedly provided with a transverse steel beam end long welding lug, the steel beam end long welding lug extends outwards from the top of the vertical long steel beam, one end of the side horizontal steel beam is located above the vertical long steel beam and the steel beam end long welding lug, the side horizontal steel beam is connected with the steel beam end long welding lug through a short bolt and a nut, the end of the side horizontal steel beam is fixedly provided with an upright steel beam end long welding lug, the steel beam end long welding lug extends downwards to the side face of the vertical long steel beam, and the steel beam end long welding lug is connected with the vertical long steel beam through a short bolt and a nut.
The left and right ends of the middle horizontal steel beam are provided with a plurality of steel beam connecting holes, one end of the side horizontal steel beam is provided with a plurality of steel beam connecting holes, and a short bolt penetrates through the steel beam connecting holes of the middle horizontal steel beam and the steel beam connecting holes of the side horizontal steel beam to be connected with nuts.
The top of the vertical short steel beam is provided with a steel beam end short soldering lug, and the lower end of the inclined steel beam is supported on the steel beam end short soldering lug.
The invention aims to overcome the defects of the prior art, and provides a supporting method for stoping of a pillar filling method under a metal mine, so that a goaf roof can be quickly and effectively supported, the safety of workers on a working face is ensured, and the working efficiency is improved.
The second object of the invention is achieved by the following technical scheme: a supporting method for stoping of a pillar filling method under a metal mine comprises the following steps:
a. the following support materials were prepared at the surface: a middle transverse steel beam section with steel beam connecting holes at two ends; one end of the side transverse steel beam is provided with a steel beam connecting hole, the other end of the side transverse steel beam is provided with a steel beam end long welding lug, and the steel beam end long welding lug is provided with a welding lug connecting hole; two inclined steel beam sections with steel beam connecting holes at one end; one end of the vertical long steel beam is welded with a long welding lug at the end of the steel beam, the long welding lug at the end of the steel beam is provided with a welding lug connecting hole, and the other end of the vertical long steel beam is provided with a steel beam connecting hole; two sections of vertical short steel beams with steel beam connecting holes and one end welded with a short welding tab at the end of the steel beam; a plurality of long bolts, matched nuts and washers; a plurality of short bolts, matched nuts, nuts and washers;
b. conveying the prepared support material to a stope for lap joint; the horizontal girder is formed by connecting a middle horizontal girder and left and right sections of side horizontal girders through a beam adjustable connecting structure, wherein the left and right ends of the middle horizontal girder are respectively provided with a plurality of girder connecting holes, one end of the side horizontal girder is provided with a plurality of girder connecting holes, the length of the horizontal girder is adjusted according to the thickness of a mineral body, short bolts penetrate into the corresponding girder connecting holes of the middle horizontal girder and the side horizontal girders, and the left and right sections of side horizontal girders are respectively connected to the left and right ends of the middle horizontal girder;
c. the transverse steel beam is connected with the two vertical long steel beams by adopting a fixed beam lap joint structure, the transverse steel beam is lapped on the upper end part of the vertical long steel beam and is vertical to the vertical long steel beam, one end part of the side transverse steel beam is positioned above the vertical long steel beam and the long welding pieces at the end parts of the steel beams, the side transverse steel beam is connected with the long welding pieces at the end parts of the steel beams by using short bolts and nuts, the long welding pieces at the end parts of the side transverse steel beam are fixedly provided with the long welding pieces at the end parts of the vertical steel beam, the long welding pieces at the end parts of the steel beam extend downwards to the side surface of the vertical long steel beam, and the long welding pieces at the end parts of the steel beam are connected with the vertical long steel beam by using the short bolts and nuts;
d. the two oblique steel beams are connected with the two vertical long steel beams by adopting a pillar end lap joint structure, the vertical short steel beams are fixedly connected to the inner side surface of the lower part of the vertical long steel beams by using short bolts and nuts, the lower end parts of the oblique steel beams are supported on the vertical short steel beams, and the lower end parts of the oblique steel beams are connected and fastened with the vertical long steel beams by using long bolts;
e. the horizontal girder steel is connected with two oblique girder steel through adjustable hank connection structure, and the girder steel connecting hole downwardly extending to the below of horizontal girder steel of side is passed to the pole portion of a stock, and the upper end overlap joint of oblique girder steel is in the pole portion of this stock, and the pole portion of this stock is in the below of oblique girder steel and this stock contact position is connected with the nut, and the horizontal girder steel of side evenly is provided with a plurality of girder steel connecting holes that are used for wearing to establish the stock for adjust the support length size.
The beneficial effects of the invention are as follows: the prepared support material is transported to the stope where it is lapped on site as required. The invention can realize the rapid and effective support of the goaf roof, greatly improves the safety and efficiency of the stud extraction operation, and has wide application prospect. The invention has the advantages of convenient disassembly and assembly, good supporting effect, high construction efficiency, adjustable length and strong adaptability of ore body thickness, and can meet the requirement of safe recovery of the upward filling method of the remained ore pillar among the tailing filling bodies in the metal mine.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the present invention in use;
FIG. 3 is a schematic view of the structure of the portion A of FIG. 1;
FIG. 4 is a schematic top view of the structure of FIG. 3;
fig. 5 is a schematic structural view of a portion B of fig. 1;
FIG. 6 is a schematic top view of the structure of FIG. 5;
fig. 7 is a schematic structural view of the portion C of fig. 1;
fig. 8 is a schematic structural view of a portion D of fig. 1;
FIG. 9 is a schematic view of the structure of a transverse steel beam;
FIG. 10 is a schematic view of the structure of a vertical steel girder;
FIG. 11 is a schematic top view of the structure of FIG. 8;
fig. 12 is a schematic top view of fig. 10.
In the figure: a-the adjustable connecting structure of the crossbeam; b-an adjustable twist connection; c-pillar end lap joint structure; d-a fixed beam lap joint structure; 1-a filled ore room; 2-stoping layering; 3-stope roof ore bodies; 4-caving ore; 5-transverse steel beams; 5 a-side transverse steel beams; 5 b-middle transverse steel beam; 6-steel beam connecting holes; 7-a nut; 8-screw heads; 9-a gasket; 10-oblique steel beams; 11-long bolts; 12-vertical long steel beams; 13-a long welding lug at the end part of the steel beam; 14-soldering lug connection holes; 15-erecting short steel beams; 16-short welding pieces at the end parts of the steel beams; 17-short bolts.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 2, the two sides of the stud are shallow hole reserved ore and then filled in the ore room 1, the stud is stoped by an upward horizontal layered filling mining method, each layered mining height is 1.5m, a top control distance of 0.5m is reserved, a goaf with a height of 2m is formed, each layered is operated on the stoped layered 2 filling body, after the current stoping layered ore is dropped, the stope roof ore body 3 is supported by the device of the invention, and then ore removal operation of the current layered caving ore 4 is carried out. The supporting device is manufactured in a lap joint mode in a stope, and each supporting material is ready to be sent to the stope on the ground surface.
As shown in fig. 1, 5 and 7, the support device for the extraction of the underground metal shaft column comprises a transverse steel beam 5 consisting of left and right sections of transverse steel beams 5a and a middle transverse steel beam 5b connected between the left and right sections of transverse steel beams 5a through short bolts 17, two sections of vertical long steel beams 12 respectively connected below the left and right ends of the transverse steel beam 5 through short bolts 17, two sections of vertical short steel beams 15 respectively connected to the lower inner side surfaces of the two sections of vertical long steel beams 12 through short bolts 17, and two oblique steel beams 10 connected between the transverse steel beams 5 and the two vertical long steel beams 12, wherein the lower end parts of the oblique steel beams 10 are supported on the vertical short steel beams 15, the lower end parts of the oblique steel beams 10 are connected with the vertical long steel beams 12 through long bolts 11 and nuts 7, the side transverse steel beams 5a are provided with longitudinal steel beam connecting holes 6, the rod parts of one long steel beam 11 extend downwards below the side transverse steel beams 5a through the connecting holes 6, the upper end parts of the oblique steel beams 10 are overlapped with the rod parts of the long steel beams 11, and the lower end parts of the oblique steel beams 10 are connected with the nuts 7 at the lower parts of the oblique steel beams 11.
As shown in fig. 6, the side cross steel beams 5a are uniformly provided with a plurality of steel beam connection holes 6 for penetrating the long bolts 11.
As shown in fig. 8 to 12, the top of the vertical long steel beam 12 is fixedly provided with a transverse steel beam end long welding tab 13, the steel beam end long welding tab 13 extends outwards from the top of the vertical long steel beam 12, one end of the side transverse steel beam 5a is positioned above the vertical long steel beam 12 and the steel beam end long welding tab 13, the side transverse steel beam 5a is connected with the steel beam end long welding tab 13 through a short bolt 17 and a nut 7, the end of the side transverse steel beam 5a is fixedly provided with an upright steel beam end long welding tab 13, the steel beam end long welding tab 13 extends downwards to the side face of the vertical long steel beam 12, and the steel beam end long welding tab 13 is connected with the vertical long steel beam 12 through a short bolt 17 and the nut 7.
As shown in fig. 3 and 4, a plurality of steel beam connecting holes 6 are formed in both left and right end portions of the middle transverse steel beam 5b, a plurality of steel beam connecting holes 6 are formed in one end of the side transverse steel beam 5a, and a short bolt 17 passes through the steel beam connecting holes 6 of the middle transverse steel beam 5b and the steel beam connecting holes 6 of the side transverse steel beam 5a to be connected with nuts 7.
As shown in fig. 7, the top of the vertical short steel beam 15 is provided with a steel beam end short tab 16, and the lower end of the diagonal steel beam 10 is supported on the steel beam end short tab 16.
Washers 9 are also arranged below the screw heads 8 of the long bolts 11 and the screw heads 8 of the short bolts 17.
As shown in fig. 1-12, a support method for mining of a pillar filling method under a metal mine comprises the following steps:
a. the following support materials were prepared at the surface: a middle section of transverse steel beam 5b with steel beam connecting holes 6 at two ends; two sections of lateral transverse steel beams 5a are provided with steel beam connecting holes 6 at one end and steel beam end long welding lugs 13 at the other end, and the steel beam end long welding lugs 13 are provided with welding lug connecting holes 14; two sections of inclined steel beams 10 with steel beam connecting holes 6 at one end; two sections of vertical long steel beams 12 with one end welded with a long welding lug 13 at the end of the steel beam and the long welding lug 13 at the end of the steel beam provided with a welding lug connecting hole 14 and the other end provided with a steel beam connecting hole 6; two sections of vertical short steel beams 15 with steel beam connecting holes 6 and steel beam end short welding lugs 16 welded at one end; a plurality of long bolts 11, matched nuts 7 and washers 9; a plurality of short bolts 17, matched nuts 7, nuts and washers 9;
b. conveying the prepared support material to a stope for lap joint; the transverse steel beam 5 is formed by connecting a middle transverse steel beam 5b with left and right section side transverse steel beams 5a through a beam adjustable connecting structure A, wherein a plurality of steel beam connecting holes 6 are formed in the left and right end parts of the middle transverse steel beam 5b, a plurality of steel beam connecting holes 6 are formed in one end of the side transverse steel beam 5a, the length of the transverse steel beam 5 is adjusted according to the thickness of a ore body, short bolts 17 penetrate into the corresponding steel beam connecting holes 6 of the middle transverse steel beam 5b and the side transverse steel beam 5a, and the left and right section side transverse steel beams 5a are respectively connected to the left and right ends of the middle transverse steel beam 5 b;
c. the transverse steel beam 5 is connected with two vertical long steel beams 12 by adopting a fixed beam lap joint structure D, the transverse steel beam 5 is lapped on the upper end part of the vertical long steel beam 12 and is vertical to the vertical long steel beam 12, one end part of the side transverse steel beam 5a is positioned above the vertical long steel beam 12 and the long welding piece 13 at the end part of the steel beam, the side transverse steel beam 5a is connected with the long welding piece 13 at the end part of the steel beam by using a short bolt 17 and a nut 7, the long welding piece 13 at the end part of the side transverse steel beam 5a is fixedly provided with the long welding piece 13 at the end part of the vertical steel beam, the long welding piece 13 at the end part of the steel beam extends downwards to the side surface of the vertical long steel beam 12, and the long welding piece 13 at the end part of the steel beam is connected with the vertical long steel beam 12 by using the short bolt 17 and the nut 7;
d. the two oblique steel beams 10 are connected with the two vertical long steel beams 12 by adopting a pillar end lap joint structure C, a vertical short steel beam 15 is fixedly connected to the inner side surface of the lower part of the vertical long steel beam 12 by using a short bolt 17 and a nut 7, the lower end part of the oblique steel beam 10 is supported on the vertical short steel beam 15, and the lower end part of the oblique steel beam 10 is connected and fastened with the vertical long steel beam 12 by using a long bolt 11;
e. the horizontal girder 5 is connected with two oblique girders 10 through adjustable hank connection structure B, and the girder steel connecting hole 6 that the girder steel connecting hole 6 of a stock 11 passed the horizontal girder steel 5a of side downwardly extending to the below of the horizontal girder steel 5a of side, and the upper end overlap joint of oblique girder steel 10 is in the pole portion of this stock 11, and the pole portion of this stock 11 is connected with nut 7 in the below of the girder steel 10 and this stock 11 contact position, and the horizontal girder steel 5a of side evenly is provided with a plurality of girder steel connecting holes 6 that are used for wearing to establish stock 11 for adjust the support length size.
The adjustable winch connection structure B, the pillar end lap joint structure C and the fixed beam lap joint structure D form a stable triangle shape together, so that the stability of the supporting device is improved, and the bearing effect of the supporting device is ensured.
In practical application, the thickness of the top and bottom ore pillars and the thickness of the intermediate pillar ore bodies of the No. 2 well three to six middle sections of the Chifeng chaihu fence gold mining company limited are 3-5m, so that the supporting device supports the intermediate pillar in full section by increasing and reducing the number of the middle transverse steel beams 5b and the positions of the adjusting bolts in different steel beam connecting holes 6. The convenient and quick manufacturing mode provided by the invention does not need to carry out conventional welding in a stope, and is replaced by a screw lap joint mode, and after the lap joint of the supporting device is finished, the portal frame with a triangular stable structure is formed, so that the safety and the efficiency of supporting work are ensured. The invention has the advantages of convenient disassembly and assembly, good supporting effect, high construction efficiency, adjustable length and strong adaptability of ore body thickness, and can meet the requirement of safe recovery of the upward filling method of the remained ore pillar among the tailing filling bodies in the metal mine.
Finally, it should be noted that the above description is only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and that the simple modification and equivalent substitution of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present invention.
Claims (1)
1. The supporting method for the recovery of the underground pillar filling method of the metal mine is characterized by comprising the following steps of:
a. the following support materials were prepared at the surface: a middle transverse steel beam section with steel beam connecting holes at two ends; one end of the side transverse steel beam is provided with a steel beam connecting hole, the other end of the side transverse steel beam is provided with a steel beam end long welding lug, and the steel beam end long welding lug is provided with a welding lug connecting hole; two inclined steel beam sections with steel beam connecting holes at one end; one end of the vertical long steel beam is welded with a long welding lug at the end of the steel beam, the long welding lug at the end of the steel beam is provided with a welding lug connecting hole, and the other end of the vertical long steel beam is provided with a steel beam connecting hole; two sections of vertical short steel beams with steel beam connecting holes and one end welded with a short welding tab at the end of the steel beam; a plurality of long bolts, matched nuts and washers; a plurality of short bolts, matched nuts, nuts and washers;
b. conveying the prepared support material to a stope for lap joint; the horizontal girder is formed by connecting a middle horizontal girder and left and right sections of side horizontal girders through a beam adjustable connecting structure, wherein the left and right ends of the middle horizontal girder are respectively provided with a plurality of girder connecting holes, one end of the side horizontal girder is provided with a plurality of girder connecting holes, the length of the horizontal girder is adjusted according to the thickness of a mineral body, short bolts penetrate into the corresponding girder connecting holes of the middle horizontal girder and the side horizontal girders, and the left and right sections of side horizontal girders are respectively connected to the left and right ends of the middle horizontal girder;
c. the transverse steel beam is connected with the two vertical long steel beams by adopting a fixed beam lap joint structure, the transverse steel beam is lapped on the upper end part of the vertical long steel beam and is vertical to the vertical long steel beam, one end part of the side transverse steel beam is positioned above the vertical long steel beam and the long welding pieces at the end parts of the steel beams, the side transverse steel beam is connected with the long welding pieces at the end parts of the steel beams by using short bolts and nuts, the long welding pieces at the end parts of the side transverse steel beam are fixedly provided with the long welding pieces at the end parts of the vertical steel beam, the long welding pieces at the end parts of the steel beam extend downwards to the side surface of the vertical long steel beam, and the long welding pieces at the end parts of the steel beam are connected with the vertical long steel beam by using the short bolts and nuts;
d. the two oblique steel beams are connected with the two vertical long steel beams by adopting a pillar end lap joint structure, the vertical short steel beams are fixedly connected to the inner side surface of the lower part of the vertical long steel beams by using short bolts and nuts, the lower end parts of the oblique steel beams are supported on the vertical short steel beams, and the lower end parts of the oblique steel beams are connected and fastened with the vertical long steel beams by using long bolts;
e. the horizontal girder steel is connected with two oblique girder steel through adjustable hank connection structure, and the girder steel connecting hole downwardly extending to the below of horizontal girder steel of side is passed to the pole portion of a stock, and the upper end overlap joint of oblique girder steel is in the pole portion of this stock, and the pole portion of this stock is in the below of oblique girder steel and this stock contact position is connected with the nut, and the horizontal girder steel of side evenly is provided with a plurality of girder steel connecting holes that are used for wearing to establish the stock for adjust the support length size.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910747035.4A CN110295923B (en) | 2019-08-14 | 2019-08-14 | Supporting device and supporting method for stoping of underground pillar filling method of metal mine |
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| CN201910747035.4A CN110295923B (en) | 2019-08-14 | 2019-08-14 | Supporting device and supporting method for stoping of underground pillar filling method of metal mine |
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| CN110295923B true CN110295923B (en) | 2023-08-22 |
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| GB338175A (en) * | 1929-06-17 | 1930-11-17 | Darlington Rolling Mills Compa | Improvements in or relating to foot attachments for pit props or steel arches employed as colliery or mining roof supports |
| GB449967A (en) * | 1934-08-29 | 1936-07-08 | Stewarts & Lloyds Ltd | Improved means for supporting roofs of mines and other underground roadways |
| CN103046936A (en) * | 2012-12-09 | 2013-04-17 | 山西鑫源机械制造有限公司 | 25U-type steel arch hoop |
| CN104533422A (en) * | 2014-12-18 | 2015-04-22 | 招金矿业股份有限公司夏甸金矿 | Noble metal mine pillar recovery method and timbering framework |
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| CN107448223A (en) * | 2016-06-01 | 2017-12-08 | 陕西彬长文家坡矿业有限公司 | Underground coal mine rectangular shaped roadways branch protecting assembly |
| CN108590649A (en) * | 2017-12-19 | 2018-09-28 | 赤峰柴胡栏子黄金矿业有限公司 | A kind of broken narrow vein medium-length hole recovery method of low-angle dip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894833B (en) * | 2017-01-23 | 2018-04-06 | 山东科技大学 | Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep |
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2019
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB338175A (en) * | 1929-06-17 | 1930-11-17 | Darlington Rolling Mills Compa | Improvements in or relating to foot attachments for pit props or steel arches employed as colliery or mining roof supports |
| GB449967A (en) * | 1934-08-29 | 1936-07-08 | Stewarts & Lloyds Ltd | Improved means for supporting roofs of mines and other underground roadways |
| CN103046936A (en) * | 2012-12-09 | 2013-04-17 | 山西鑫源机械制造有限公司 | 25U-type steel arch hoop |
| CN104533422A (en) * | 2014-12-18 | 2015-04-22 | 招金矿业股份有限公司夏甸金矿 | Noble metal mine pillar recovery method and timbering framework |
| CN107448223A (en) * | 2016-06-01 | 2017-12-08 | 陕西彬长文家坡矿业有限公司 | Underground coal mine rectangular shaped roadways branch protecting assembly |
| CN205936657U (en) * | 2016-08-27 | 2017-02-08 | 赤峰柴胡栏子黄金矿业有限公司 | Scalable removal of whole hydraulic pressure lining car |
| CN108590649A (en) * | 2017-12-19 | 2018-09-28 | 赤峰柴胡栏子黄金矿业有限公司 | A kind of broken narrow vein medium-length hole recovery method of low-angle dip |
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| Publication number | Publication date |
|---|---|
| CN110295923A (en) | 2019-10-01 |
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