CN103470289A - Contiguous coal seam mining support method - Google Patents
Contiguous coal seam mining support method Download PDFInfo
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- CN103470289A CN103470289A CN2013104409751A CN201310440975A CN103470289A CN 103470289 A CN103470289 A CN 103470289A CN 2013104409751 A CN2013104409751 A CN 2013104409751A CN 201310440975 A CN201310440975 A CN 201310440975A CN 103470289 A CN103470289 A CN 103470289A
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Abstract
The invention relates to a coal mine underground roadway support method, in particular to a contiguous coal seam mining support method, which comprises the steps of roof supporting and two side supporting, wherein the roof supporting is divided into supporting for coal seam distance which is 2.0-3.0m and supporting for coal seam distance which is smaller than 2.0m; when the coal seam distance is 2.0-3.0m, steel strips and steel beams with supporting holes are horizontally fixed at intervals along the length direction on a roadway roof through anchor rods and anchor cables, and the distance between adjacent steel strip and steel beam on the roof is 1000mm; when the coal seam distance is smaller than 2.0m, the steel strips and the steel beams with the supporting holes are horizontally fixed at intervals along the length direction on the roadway roof through the anchor rods and the anchor cables, and the distance between adjacent steel strip and steel beam on the roof is 800mm; during two side supporting, wood supporting plates with supporting holes are vertically fixed at intervals on the two sides of a roadway through the anchor rods. The coal mine underground roadway support method provided by the invention solves the problems that accidents of roof falling and roof collapse with cavity are very apt to happen in working faces when the existing support method is used for the supporting of lower-position coal seams.
Description
Technical field
The present invention relates to the coal mine down-hole tunnel supporting method, be specially point blank seam mining supporting method.
Background technology
In recent years, coal seam group mining more and more causes the attention on mining circle in China, and reason has two aspects, is at first that China multiple seam composes that to deposit and exploit proportion very large, and all there is the problem of multiple seam exploitation in mining area mostly; Next is that exploitation has for many years made the coal seam reserves of part mining area occurrence condition " superior " fewer and feweri.Continuous increase along with coal mining intensity, fast-developing high-yield and high-efficiency technology in recent years particularly, oneself,, through making the coal seam that most of mining area exploitation condition is good approach exhaustion in the shorter length of service, impels the mining problem of coal seam group to enter rapidly people's the visual field, and attracts great attention.
For coal seam group mining, when the coal seam interfloor distance is larger, the mining effect degree to the next coal seam after upper seam mining is very little, and its ore deposit presses Strata Behavior, exploitation method not affected by upper seam mining, basic identical with common single coal bed exploitation.But, along with the coal seam spacing reduces, that between upper and lower coal seam, exploits influences each other and can increase gradually, particularly when the coal seam spacing is very near, the integrated degree of the next seam mining front top plate has been subject to superjacent exploitation damage influence, overstock again the spoil that has upper seam mining to be caving on top board, thereby make the next seam mining compare and many new mine pressure phenomenons occur with the single coal bed exploitation, each side such as manifesting degree is pressed in the mechanics, rack bearing feature, pressure transfer law and the ore deposit that are mainly manifested in top board.And experience and the theory of existing single coal bed exploitation and short range seam mining face roof CONTROL OF STRATA MOVEMENT can not be pressed phenomenon and mechanism in this ore deposit of well explain, make in the process of point blank seam mining, there are many technical barriers.Practice shows, during the next seam mining, work plane very easily occurs that top board emits, the leakage accident, and then cause with upper coal seam goaf and link up, work plane leaks out, having a strong impact on the performance of mine normal production and production capacity, in the process of point blank seam mining, is technical barrier urgently to be resolved hurrily.
Summary of the invention
When the present invention carries out supporting with existing supporting method to the next coal seam in order to solve, work plane very easily occurs that top board emits, the problem of leakage accident, and point blank seam mining supporting method is provided.
The present invention adopts following technical scheme to realize: point blank seam mining supporting method, comprise that roof timbering and two helps supporting, and roof timbering comprises the following steps: when the coal seam spacing is 2.0 ~ 3.0m,
Steel band with an eyeshield is fixing between two parties by anchor pole and anchor cable horizontal interval along its length on back, the specification of steel band is 3150 * 150 * 3mm, the array pitch of steel band is 2000mm, spacing on steel band between an eyeshield is 850mm, an eyeshield at steel band two ends and end distance are respectively 300mm, anchor pole vertically is inserted in an eyeshield at steel band middle part, anchor cable inserts in two lateral walls in the eyeshield by the steel band two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used is φ 16 * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable is φ 16mm * 3000mm, the Anchor Agent of fixing anchor bar and anchor cable is two resin explosive rolls, specification is MSK-2230 and MSK2360,
Girder steel with an eyeshield is fixing between two parties by anchor pole and anchor cable horizontal interval along its length on back, the specification of girder steel is 3150 * 150 * 3mm, the array pitch of girder steel is 2000mm, spacing on girder steel between an eyeshield is 850mm, an eyeshield at girder steel two ends and end distance are respectively 300mm, anchor pole vertically is inserted in an eyeshield at girder steel middle part, anchor cable inserts in two lateral walls in the eyeshield by the girder steel two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used is φ 16 * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable is φ 16mm * 3000mm, the Anchor Agent of fixing anchor bar and anchor cable is two resin explosive rolls, specification is MSK-2230 and MSK2360, spacing on top board between adjacent girder steel and steel band is 1000mm,
When the coal seam spacing is less than 2.0m,
Steel band with an eyeshield is fixing between two parties by anchor pole and anchor cable horizontal interval along its length on back, the specification of steel band is 3150 * 150 * 3mm, the array pitch of steel band is 1600mm, spacing on steel band between an eyeshield is 850mm, an eyeshield at steel band two ends and end distance are respectively 300mm, anchor pole vertically is inserted in an eyeshield at steel band middle part, anchor cable inserts in two lateral walls in the eyeshield by the steel band two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used is φ 16mm * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable is φ 16 * 2000mm, the Anchor Agent of fixing anchor bar and anchor cable is two resin explosive rolls, specification is MSK-2230 and MSK2360,
Girder steel with an eyeshield is fixing between two parties by anchor pole and anchor cable horizontal interval along its length on back, the specification of girder steel is 3150 * 150 * 3mm, the array pitch of girder steel is 1600mm, spacing on girder steel between an eyeshield is 850mm, an eyeshield at girder steel two ends and end distance are respectively 300mm, anchor pole vertically is inserted in an eyeshield at girder steel middle part, anchor cable inserts in two lateral walls in the eyeshield by the girder steel two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used is φ 16mm * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable is φ 16 * 2000mm, the Anchor Agent of fixing anchor bar and anchor cable is two resin explosive rolls, specification is MSK-2230 and MSK2360, spacing on top board between adjacent girder steel and steel band is 800mm,
Two help supporting to comprise the following steps: the wooden supporting plate with an eyeshield is fixing between two parties by the anchor pole vertical spacing along its length on roadway's sides, the specification of wooden supporting plate is 200 * 350 * 50mm, fixedly the anchoring agent is cement-roll, the powder stick specification is φ 25 * 400mm, spacing on wooden supporting plate between an eyeshield is 600mm, the array pitch of wooden supporting plate is 10000mm, and anchor pole is φ 20mm * 2000mm left hand thread steel anchor rod.
When the coal seam spacing is different, roof timbering mode difference, two help support pattern identical.
The present invention is according to the coal seam spacing, determine different supporting schemes, better adapt to the supporting situation of different coal spacing, anchor pole used in supporting, the specification of anchor cable, steel band, the spacing of an eyeshield on girder steel and wooden supporting plate, the array pitch of steel band, the array pitch of girder steel, and the parameters such as spacing between steel band and girder steel be by the supporting personnel repeatedly supporting test draw, particularly anchor cable tiltedly is inserted in two lateral walls with the angle with 45 ~ 55 ° of top board angles by an eyeshield at steel band and girder steel two ends, anchor cable can be anchored on the reserved coal wall in goaf, top board upper strata, increased the contact area of anchor cable, particularly anchor cable inserts with the angle with 45 ~ 55 ° of top board angles, take full advantage of the reserved coal wall in goaf, more strengthened supporting effect, work plane is not easy to occur top board and emits, the leakage accident.
The invention provides a kind of point blank seam mining supporting method, when having solved existing supporting method supporting being carried out in the next coal seam, work plane very easily occurs that top board emits, the problem of leakage accident.
The accompanying drawing explanation
Schematic diagram when Fig. 1 is the back supporting.
The upward view that Fig. 2 is Fig. 1.
In figure: the 1-back, the 2-steel band, the 3-anchor cable, the 4-anchor pole, the 5-girder steel, 6-props up eyeshield.
The specific embodiment
The supporting of point blank seam mining, comprise that roof timbering and two helps supporting, and roof timbering comprises the following steps: when the coal seam spacing is 2.0 ~ 3.0m,
When the coal seam spacing is less than 2.0m,
Two help supporting to comprise the following steps: the wooden supporting plate with an eyeshield is fixing between two parties by the anchor pole vertical spacing along its length on roadway's sides, the specification of wooden supporting plate is 200 * 350 * 50mm, fixedly the anchoring agent is cement-roll, the powder stick specification is φ 25 * 400mm, spacing on wooden supporting plate between an eyeshield is 600mm, the array pitch of wooden supporting plate is 10000mm, and anchor pole is φ 20mm * 2000mm left hand thread steel anchor rod.
Claims (1)
1. point blank seam mining supporting method, is characterized in that comprising that roof timbering and two helps supporting, and roof timbering comprises the following steps: when the coal seam spacing is 2.0 ~ 3.0m,
Steel band (2) with an eyeshield (6) is fixing between two parties by anchor pole (4) and anchor cable (3) horizontal interval along its length on back (1), the specification of steel band (2) is 3150 * 150 * 3mm, the array pitch of steel band (2) is 2000mm, spacing between the upper eyeshield (6) of steel band (2) is 850mm, an eyeshield (6) at steel band (2) two ends and end distance are respectively 300mm, anchor pole (4) vertically is inserted in an eyeshield (6) at steel band (2) middle part, anchor cable (3) inserts in two lateral walls in the eyeshield by steel band (2) two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used (4) is φ 16 * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable (3) is φ 16mm * 3000mm, the Anchor Agent of fixing anchor bar (4) and anchor cable (3) is two resin explosive rolls, specification is MSK-2230 and MSK2360,
Girder steel (5) with an eyeshield (6) is fixing between two parties by anchor pole (4) and anchor cable (3) horizontal interval along its length on back (1), the specification of girder steel (5) is 3150 * 150 * 3mm, the array pitch of girder steel (5) is 2000mm, spacing between the upper eyeshield (6) of girder steel (5) is 850mm, an eyeshield (6) at girder steel (5) two ends and end distance are respectively 300mm, anchor pole (4) vertically is inserted in an eyeshield (6) at girder steel middle part, anchor cable (3) inserts in two lateral walls in the eyeshield (6) by girder steel (5) two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used (4) is φ 16 * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable (3) is φ 16mm * 3000mm, the Anchor Agent of fixing anchor bar (4) and anchor cable (3) is two resin explosive rolls, specification is MSK-2230 and MSK2360, spacing on top board between adjacent girder steel and steel band is 1000mm,
When the coal seam spacing is less than 2.0m,
Steel band (2) with an eyeshield (6) is fixing between two parties by anchor pole (4) and anchor cable (3) horizontal interval along its length on back, the specification of steel band (2) is 3150 * 150 * 3mm, the array pitch of steel band (2) is 1600mm, spacing between the upper eyeshield (6) of steel band (2) is 850mm, an eyeshield (6) at steel band (2) two ends and end distance are respectively 300mm, anchor pole (4) vertically is inserted in an eyeshield (6) at steel band (2) middle part, anchor cable (3) inserts in two lateral walls in the eyeshield by steel band (2) two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used (4) is φ 16mm * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable (3) is φ 16 * 2000mm, the Anchor Agent of fixing anchor bar (4) and anchor cable (3) is two resin explosive rolls, specification is MSK-2230 and MSK2360,
Girder steel (5) with an eyeshield (6) is fixing between two parties by anchor pole and anchor cable horizontal interval along its length on back, the specification of girder steel (5) is 3150 * 150 * 3mm, the array pitch of girder steel (5) is 1600mm, spacing between the upper eyeshield of girder steel (5) is 850mm, an eyeshield (6) at girder steel (5) two ends and end distance are respectively 300mm, anchor pole (4) vertically is inserted in an eyeshield (6) at girder steel (5) middle part, anchor cable (3) inserts in two lateral walls in the eyeshield by the girder steel two ends with the angle with 45 ~ 55 ° of top board angles, anchor pole used (4) is φ 16mm * 1700mm left hand thread steel anchor rod, the steel strand that anchor cable (3) is φ 16 * 2000mm, the Anchor Agent of fixing anchor bar (4) and anchor cable (3) is two resin explosive rolls, specification is MSK-2230 and MSK2360, spacing on top board between adjacent girder steel and steel band is 800mm,
Two help supporting to comprise the following steps: the wooden supporting plate with an eyeshield is fixing between two parties by the anchor pole vertical spacing along its length on roadway's sides, the specification of wooden supporting plate is 200 * 350 * 50mm, fixedly the anchoring agent is cement-roll, the powder stick specification is φ 25 * 400mm, spacing on wooden supporting plate between an eyeshield is 600mm, the array pitch of wooden supporting plate is 10000mm, and anchor pole is φ 20mm * 2000mm left hand thread steel anchor rod.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103670470A (en) * | 2013-12-31 | 2014-03-26 | 大同煤矿集团有限责任公司 | Full coal roadway safe and speedy drivage supporting method |
| CN104453960A (en) * | 2014-10-01 | 2015-03-25 | 西安科技大学 | Supporting method for external staggering slipping deformation roadway of thick coal seam with soft dirt band layer |
| CN105825018A (en) * | 2016-03-18 | 2016-08-03 | 山东科技大学 | Design method for close-distance coal roadway supporting structure and supporting parameters below coal mine goaf |
| 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 |
| CN109488353A (en) * | 2018-10-23 | 2019-03-19 | 新汶矿业集团有限责任公司 | A kind of stope advance support system and method |
| CN110029994A (en) * | 2019-04-15 | 2019-07-19 | 中国矿业大学 | A kind of contiguous seams are to adopting to pick mining induced stress control method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670470A (en) * | 2013-12-31 | 2014-03-26 | 大同煤矿集团有限责任公司 | Full coal roadway safe and speedy drivage supporting method |
| CN104453960A (en) * | 2014-10-01 | 2015-03-25 | 西安科技大学 | Supporting method for external staggering slipping deformation roadway of thick coal seam with soft dirt band layer |
| CN105825018A (en) * | 2016-03-18 | 2016-08-03 | 山东科技大学 | Design method for close-distance coal roadway supporting structure and supporting parameters below coal mine goaf |
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| 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 |
| CN109488353A (en) * | 2018-10-23 | 2019-03-19 | 新汶矿业集团有限责任公司 | A kind of stope advance support system and method |
| CN110029994A (en) * | 2019-04-15 | 2019-07-19 | 中国矿业大学 | A kind of contiguous seams are to adopting to pick mining induced stress control method |
| CN110029994B (en) * | 2019-04-15 | 2020-02-21 | 中国矿业大学 | Opposite-mining opposite-excavation mining stress control method for close-distance coal seam |
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