CN205422761U - Lower closely coal road supporting construction of coal mine goaf - Google Patents
Lower closely coal road supporting construction of coal mine goaf Download PDFInfo
- Publication number
- CN205422761U CN205422761U CN201620213959.8U CN201620213959U CN205422761U CN 205422761 U CN205422761 U CN 205422761U CN 201620213959 U CN201620213959 U CN 201620213959U CN 205422761 U CN205422761 U CN 205422761U
- Authority
- CN
- China
- Prior art keywords
- coal
- anchor
- strength
- anchor pole
- roof
- 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 - Fee Related
Links
Landscapes
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The utility model discloses a lower closely coal road supporting construction of coal mine goaf, the roof of coal road and two help to adopt stock class supporting construction, the stock adopts the high pretightning force stock that excels in, and high pretightning force stock becomes a complete combination beam with top of roadway coal and roof rock improvement through excelling in, every still arranges horizontal joist and the anchor rope more than two on strutting sectional roof at the coal road, and is taut with the joist through the anchor rope to to consolidate the combination beam that forms by the high pretightning force stock that excels in suspends in midair. The utility model discloses anchor bolt support can prevent the loose inbreak in roof rock stratum effectively, can receive that the exploitation influence of upper portion coal seam, integrality receive the upper portion coal seam of certain destruction degree or the stress -released zone rock improvement that falls for collapsing after the exploitation of coal seam becomes a complete combination beam with oneself, and rethread anchor rope steel channel beam's the effect of suspending in midair, it is less to make lower part coal seam exploitation in -process roof structure change, avoids appearing great rock pressure, the integrality of assurance lower part heading.
Description
Technical field
This utility model relates to mining technique field, especially underground goaf supporting construction..
Background technology
Difference due to condition of coal seam occurrence, the minable coal seam number of plies in different coalfields also can differ greatly from one layer to tens of layers, interfloor distance size, the general interfloor distance referred to as contiguous seams less than 6 meters, the difference of coal seam interlamellar spacing, mutual mining effect degree difference is the biggest.When the interlamellar spacing in coal seam is bigger, the least to the mining effect degree of underlying seam after superjacent exploitation, the recovery method in coal seam, its underpart and strata behaviors rule are general not by the mining effect of superjacent.But the reduction along with coal seam spacing, between coal seam, the degree of influencing each other of exploitation can be gradually increased up and down, particularly when coal seam spacing is close, underlying seam exploitation before its top board oneself by superjacent exploitation damage influence and integrity by a certain degree of destruction, superjacent now or for the rock (stress relaxed area) being caving after seam mining or for the section coal pillar (area of stress concentration) of residual, top board structure and ambient stress generation great change in underlying seam recovery process can be caused, so that underlying seam recovery process occurs in that complex mine pressure and strata behaviors feature compared with conventional single coal bed exploitation situation.Certain difficulty is brought for the roadways layout of closely underlying seam and the selection of drift support type.
And existing single coal bed or the roof strata control theory of big spacing seam mining and experience, it is impossible to explain the ore deposit pressure phenomena principles under the conditions of contiguous seams and control mechanism well.At present, China's coal roadway support major part uses anchor pole or anchor net or anchor band support technology, but above-mentioned anchor pole class supporting construction, supporting parameter etc. each depend on geological mining condition.Owing under nearly goaf, butt entry roof state has particularity, during ultra close distance coal seam is exploited, the existing method for protecting support of underlying seam coal road, it is difficult to ensure that the integrity in tunnel, is the most all subject to destruction in various degree, and impact is normal to be produced.
Utility model content
The purpose of this utility model is for the closely top board structure of coal road, ambient stress and strata behaviors feature under coal mine gob, designs a kind of new supporting construction.
Closely coal roadway support structure under a kind of coal mine gob, the top board of coal road and two is helped to use anchor pole class supporting construction, it is characterized in that, the anchor pole of described anchor pole class supporting construction uses high-strength high pretightening force anchor pole, by high-strength high pretightening force anchor pole, roadway roof coal and roof strata is reinforced into a complete combination beam；The top board of coal road each supporting section there also is provided horizontal joist and the anchor cable of more than two, by anchor cable, joist strained, thus will be suspended in midair by the combination beam of high-strength high pretightening force bolt anchorage.
Above-mentioned high-strength high pretightening force rockbolt installation, when top board, uses the mining high-strength screw-thread steel of diameter 20mm, and rock-bolt length is at least above base plate lesion depths hσAdding the length of two pieces of resin anchoring agents, and be not less than 2400mm, it is desirable to its yield strength ＞ 500MPa, tensile strength ＞ 650MPa, anchor pole applies more than pretightning force 60KN；Above-mentioned high-strength high pretightening force rockbolt installation is when two help, using the mining high-strength screw-thread steel of diameter 180mm, rock-bolt length is more than 2000mm, it is desirable to its yield strength ＞ 500MPa, tensile strength ＞ 650MPa, anchor pole applies more than pretightning force 40KN；Require that anchor spacing and array pitch are 800-1000mm；Above-mentioned anchor cable uses mining cage modle anchor cable, anchor cable diameter 17-18mm, and anchor cable fitting depth should be near the bottom in superjacent goaf, and at least 4500mm, maximum Fracture Force ＞ 353KN；Above-mentioned joist uses 11# channel-section steel, length 2200mm；Require that joist arranges one every two row's anchor poles.
According to traditional rockbolt installation method, using two pieces of water proof type resin anchoring agents at the bottom of hole, anchor pole aperture uses the high-strength arch shaped trays of 300 × 300 × 12mm；Install and at the bottom of anchor cable hole when, use four pieces of water proof type resin anchoring agents, the anchor cable pallet on joist to use the flat pallet of 100 × 100 × 10mm.
The good effect of this high-strength pretightning force anchor pole+anchor cable steel channel beam supporting construction is, existence due to goaf, top, using long anchor cable sus-pension is impossible under this special geologic condition, therefore, use high pretightening force anchor pole can be effectively improved the residual strength of country rock, give full play to the bearing capacity of country rock self, anchoring body in the range of anchor pole anchors with it constitutes a kind of anchoring support body, under the constraint and shearing resistance effect of anchor pole, the coal and rock being prone to loosening after making plastic failure is formed to be had certain bearing capacity and is suitable for the anchor pole balanced arch of surrouding rock deformation, thus improve the globality of top board, prevent the loose inbreak of top board.From tunnel longitudinally, the anchoring balanced arch that suspension roof support is formed be above driving face empty top zone top board from steady basis.Therefore, high pretightening force high strength anchor bar supporting is used can effectively to stop the loose inbreak of roof strata, oneself can be become a complete combination beam by superjacent mining effect, integrity by the superjacent of certain destructiveness or the stress relaxed area rock improvement for being caving after seam mining, again by the suspension function of anchor cable steel channel beam, make top board structure change in underlying seam recovery process less, avoid the occurrence of bigger mine pressure, it is ensured that the integrity in underlying seam tunnel.
Accompanying drawing explanation
Fig. 1 is the supporting construction sectional drawing of embodiment；
Fig. 2 is the roof support structure plane graph of embodiment.
Marginal data, 1-two helps anchor pole, 2-side portion's steel band, 3-joist, 4-roll bolt, 5-anchor cable, 6-top steel band, the high-strength arch shaped trays of 7-.
Detailed description of the invention
As shown in Figure 1 and Figure 2, closely coal roadway support structure under a kind of coal mine gob, the top board of coal road and two is helped to use anchor pole class supporting construction；Wherein, the anchor pole of described anchor pole class supporting construction uses high-strength high pretightening force anchor pole, helps anchor pole 1 and roll bolt 4 including two, by the roll bolt 4 of high-strength high pretightening force, roadway roof coal and roof strata is reinforced into a complete combination beam；The top board of coal road each supporting section there also is provided horizontal joist 3 and the anchor cable 5 of more than two, by anchor cable 5, joist 3 is strained, thus the combination beam that roll bolt 4 is reinforced is suspended in midair；When above-mentioned roll bolt 4 is installed, using diameter 20mm, the mining high-strength screw-thread steel of length 2400mm, it is desirable to its yield strength ＞ 15.7t, tensile strength ＞ 19.7t, anchor pole applies more than pretightning force 6t；When above-mentioned two help anchor pole 1 to install, using diameter 180mm, the mining high-strength screw-thread steel of length 2200mm, it is desirable to its yield strength ＞ 12.7t, tensile strength ＞ 18t, anchor pole applies more than pretightning force 4t；Require that anchor spacing value a and array pitch value b are 800-1000mm；Above-mentioned anchor cable 5 uses mining cage modle anchor cable, and anchor cable diameter 17-18mm, length are more than 4500mm, maximum Fracture Force ＞ 36t；Above-mentioned joist 3 uses 11# channel-section steel, length 2200mm；Require that joist arranges one every two row's anchor poles 4.
According to traditional rockbolt installation method, using two pieces of water proof type resin anchoring agents at the bottom of hole, anchor pole aperture uses the high-strength arch shaped trays of 300 × 300 × 12mm 7；Install and at the bottom of anchor cable hole when, use four pieces of water proof type resin anchoring agents, the anchor cable pallet on joist 3 to use the flat pallet of 100 × 100 × 10mm.
Also showing in figure that the anchor pole class supporting of embodiment uses anchor band supporting, two help to be provided with side portion's steel band 2, and top is provided with top steel band 6.
Claims (2)
1. closely coal roadway support structure under a coal mine gob, the top board of coal road and two is helped to use anchor pole class supporting construction, it is characterized in that, the anchor pole of described anchor pole class supporting construction uses high-strength high pretightening force anchor pole, by high-strength high pretightening force anchor pole, roadway roof coal and roof strata is reinforced into a complete combination beam；The top board of coal road each supporting section there also is provided horizontal joist and the anchor cable of more than two, by anchor cable, joist is strained, thus will be suspended in midair by the combination beam of high-strength high pretightening force bolt anchorage.
2. closely coal roadway support structure under coal mine gob as claimed in claim 1, it is characterised in that
Described high-strength high pretightening force rockbolt installation, when top board, uses the mining high-strength screw-thread steel of diameter 20mm, and rock-bolt length is at least above base plate lesion depths hσAdding the length of two pieces of resin anchoring agents, and be not less than 2400mm, it is desirable to its yield strength ＞ 500MPa, tensile strength ＞ 650MPa, anchor pole applies more than pretightning force 60KN；
Described high-strength high pretightening force rockbolt installation is when two help, using the mining high-strength screw-thread steel of diameter 180mm, rock-bolt length is more than 2000mm, it is desirable to its yield strength ＞ 500MPa, tensile strength ＞ 650MPa, anchor pole applies more than pretightning force 40KN；Require that anchor spacing and array pitch are 800-1000mm；
Described anchor cable uses mining cage modle anchor cable, anchor cable diameter 17-18mm, and anchor cable fitting depth should be near the bottom in superjacent goaf, and at least 4500mm, maximum Fracture Force ＞ 353KN；
Described joist uses 11# channel-section steel, length 2200mm；Require that joist arranges one every two row's anchor poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620213959.8U CN205422761U (en) | 2016-03-18 | 2016-03-18 | Lower closely coal road supporting construction of coal mine goaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620213959.8U CN205422761U (en) | 2016-03-18 | 2016-03-18 | Lower closely coal road supporting construction of coal mine goaf |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205422761U true CN205422761U (en) | 2016-08-03 |
Family
ID=56520563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620213959.8U Expired - Fee Related CN205422761U (en) | 2016-03-18 | 2016-03-18 | Lower closely coal road supporting construction of coal mine goaf |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205422761U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218069A (en) * | 2017-07-18 | 2017-09-29 | 陕西陕煤黄陵矿业有限公司 | A kind of back suspension device and method for protecting support |
| CN108222984A (en) * | 2018-01-04 | 2018-06-29 | 晋城煤炭规划设计院 | The advance support structure of the loose coal road of breaking roof |
| CN108625889A (en) * | 2018-08-08 | 2018-10-09 | 霍州煤电集团有限责任公司 | A kind of combined anchor anchor cable support apparatus |
| CN113236321A (en) * | 2021-06-29 | 2021-08-10 | 招金矿业股份有限公司 | Anchor rod supporting method |
| CN117685028A (en) * | 2024-02-01 | 2024-03-12 | 中国矿业大学(北京) | Roadway surrounding rock internal and external coupling shearing-resistant locking control system and monitoring method |
-
2016
- 2016-03-18 CN CN201620213959.8U patent/CN205422761U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218069A (en) * | 2017-07-18 | 2017-09-29 | 陕西陕煤黄陵矿业有限公司 | A kind of back suspension device and method for protecting support |
| CN108222984A (en) * | 2018-01-04 | 2018-06-29 | 晋城煤炭规划设计院 | The advance support structure of the loose coal road of breaking roof |
| CN108625889A (en) * | 2018-08-08 | 2018-10-09 | 霍州煤电集团有限责任公司 | A kind of combined anchor anchor cable support apparatus |
| CN113236321A (en) * | 2021-06-29 | 2021-08-10 | 招金矿业股份有限公司 | Anchor rod supporting method |
| CN113236321B (en) * | 2021-06-29 | 2022-05-24 | 招金矿业股份有限公司 | Anchor rod supporting method |
| CN117685028A (en) * | 2024-02-01 | 2024-03-12 | 中国矿业大学(北京) | Roadway surrounding rock internal and external coupling shearing-resistant locking control system and monitoring method |
| CN117685028B (en) * | 2024-02-01 | 2024-04-12 | 中国矿业大学(北京) | Roadway surrounding rock internal and external coupling shearing-resistant locking control system and monitoring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205422761U (en) | Lower closely coal road supporting construction of coal mine goaf | |
| CN105825018B (en) | Short distance roadway support parameter design method under coal mine gob | |
| US10989051B2 (en) | Multi-section non-pillar staggered protected roadway for deep inclined thick coal seam and method for coal pillar filling between sections | |
| CN110374600B (en) | Non-offset arrangement method for mining roadway of extremely-close coal seam group | |
| CN104358572B (en) | Non-pillar mining technology by spontaneous caving filling roadway at large inclined angle steeply inclined seam | |
| CN103244122B (en) | Trinity coupling support stability control method for gob-side entry-driving coal pillar | |
| CN109826667A (en) | The I-shaped checkdam of coal mine underground reservoir | |
| CN102839984B (en) | Oversized-section underground supporting structure | |
| CN107725052B (en) | One kind, which is adopted, stays integration exploitation gob side entry top plate constant-resistance anchor body beam method for protecting support | |
| CN113914862B (en) | Roof-cutting pressure-relief coal-pillar-free self-entry mining design and evaluation method | |
| CN104612729B (en) | A kind of asymmetric anchor beam structure and its method for protecting support for gob side entry top plate | |
| CN108150206A (en) | A kind of method by fully-mechanized mining working crossheading caving place | |
| CN102635377A (en) | Tensile reinforcement concrete spray body supporting method for deep soft roadway | |
| CN104453944A (en) | Coal-pillar-impacting-preventing roadway protecting method | |
| AU2020202743B2 (en) | Strip support method by using filler and residual coal pillar in irregular goaf | |
| CN103195443A (en) | Deep mining method capable of optimizing support parameters and preventing roadway delaying water gushing | |
| CN105927243A (en) | Device and method for supporting downhole surrounding rock faults | |
| CN112267898A (en) | Internal and external interactive supporting structure and supporting method for tunnel portal with large span | |
| CN113605893B (en) | Control method for pre-filling full gob-side entry driving surrounding rock | |
| CN208310825U (en) | Gob side entry driving fender erosion control release anchors integral structure to drawing | |
| CN110566238A (en) | Mud rock roof small coal pillar gob-side roadway supporting structure and method thereof | |
| CN104265294A (en) | Coal pillar-free mining technology for blasting mining face of steeply dipping seam | |
| CN104790991A (en) | Mining roadway surrounding rock strong and long top anchoring technology | |
| CN114087016B (en) | Caving-to-filling mining isolation top column pre-control supporting method | |
| CN102758629A (en) | Method for enabling fully mechanized face to directly pass through collapse pillar by drilling weakened rock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20170318 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |