CN103244122A - Trinity coupling support stability control method for gob-side entry-driving coal pillar - Google Patents

Trinity coupling support stability control method for gob-side entry-driving coal pillar Download PDF

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Publication number
CN103244122A
CN103244122A CN2013101733325A CN201310173332A CN103244122A CN 103244122 A CN103244122 A CN 103244122A CN 2013101733325 A CN2013101733325 A CN 2013101733325A CN 201310173332 A CN201310173332 A CN 201310173332A CN 103244122 A CN103244122 A CN 103244122A
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China
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gob
coal
entry
coal column
coal pillar
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CN2013101733325A
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Chinese (zh)
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CN103244122B (en
Inventor
张源
万志军
裴松
李付臣
国峰
李华
周长冰
程敬义
赵永亮
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中国矿业大学
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Publication of CN103244122B publication Critical patent/CN103244122B/en

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Abstract

The invention provides a trinity coupling support stability control method for a gob-side entry-driving coal pillar, which is particularly suitable for a large-deformation gob-side roadway with an unstable overlying rock. A pre-stress threaded steel anchor rod is used on the gob-side entry-driving coal pillar on an upper zone roadway coal pillar side to tension a coal pillar goaf-side coal body; a short anchor rod on a lower zone gob-side entry-driving coal pillar side is used for controlling the integrity of a whole displacement region of a coal pillar roadway side; and meanwhile, a long grouting anchor cable is matched to reinforce an anchoring point so as to limit the development of an inner separation layer in the whole displacement region. A range of generating a crushed region of the coal pillar under the effect of lateral supporting pressure can be relieved under the expression of a haling effect of the pre-stress threaded steel anchor rod, so as to prevent an instability state of the coal pillar from worsening; and 'controlling by the short rod and grouting by the long rod' of the short anchor rod and the long grouting anchor cable are given into fully play so as to prevent a coal pillar support structure from losing effect and re-achieve the supporting capability of a remained anchoring structure in the coal pillar, so that coupling support with alternative anchor net support and anchor grouting support is formed between the gob-side entry-driving coal pillar side and a goaf side.

Description

Gob side entry driving coal column stability Trinity coupling supporting control method
Technical field
The present invention relates to a kind of coal column stability control method, especially a kind ofly be applicable under the coal mine gob side entry driving coal column of large deformation stability Trinity coupling supporting control method under the unstable overlying rock.
Background technology
The basis that the gob side entry driving technology is developed rapidly is the Surrounding Rock Control Technology of gob side entry driving, be the key of gob side entry driving Surrounding Rock Control and keep the stable of narrow coal column, the research of the narrow coal column stability of relevant gob side entry driving control technology at present focus mostly on before the pick lane coal pillar width and dig the aspects such as support technology of coal column later on, lane, also not the unified consideration of the roadway surrounding rock control measure during the roadway support of upper curtate, gob side entry driving and this work plane mining influence overall process, comprehensively determine gob side entry coal column stability techniques.And this type of research all is based upon on the basic condition, namely the driving along empty side tunnel is to carry out after upper curtate goaf overlying rock is stablized or be basicly stable, by contrast, owing to be subjected to the restriction of field trial condition, at the research of gob side entry driving Surrounding Rock Control Technology under the unstable overlying strata still seldom.Especially, nervous situation is taken in order to alleviate to produce in some collieries in recent years, as yet under the fully unstable situation, namely establishes the driving that narrow coal column carries out lower curtate working face extraction tunnel by staying along the goaf at upper curtate work plane goaf overlying rock.This situation is called as gob side entry driving under the unstable overlying strata.The upper curtate goaf is under the abundant unstable condition of overlying rock, goaf side does not also form stable remaining bearing pressure in coal body, the ore deposit is pressed and is manifested instability still, this moment, significantly distortion generally namely appearred in the gob side entry along the goaf driving during tunneling, and during this working face mining, influenced by leading bearing pressure, roadway deformation destroys even more serious, even need to expand group and could satisfy production requirement, gently then increase cost of production, heavy then bring potential safety hazard.Gob side entry driving, the gob side entry driving coal column stability control under the especially unstable overlying strata is the key of gob side entry driving Surrounding Rock Control under this condition, needs new approaches to instruct down and adopts new technical scheme just can reach target.
Summary of the invention
Technical problem: purpose of the present invention in the prior art problem, the surrouding rock deformation of a kind of effective control gob side entry driving and narrow coal column stability are provided, guarantee the gob side entry driving coal column stability Trinity coupling supporting control method that downhole safety is produced, this method is primarily aimed at gob side entry driving.
Technical scheme: gob side entry driving coal column stability Trinity coupling supporting control method of the present invention comprises above step:
A, in upper curtate stope drift active workings drivings and supporting construction process, at upper curtate work plane goaf overlying rock as yet under the fully unstable situation, in upper curtate stope drift active workings coal column one side many prestressing force twisted steel anchor rods are installed, are utilized prestressing force twisted steel anchor rod anchorage effect tension coal column tunnel side coal body;
B, in lower curtate gob side entry driving process, carry out lower curtate work plane gob side entry driving, at the short anchor pole of lower curtate gob side entry coal column one side prestressed, adopt to lengthen anchorage style;
C, in lower curtate work plane gob side entry driving process, when the short anchor pole of gob side entry driving coal column side prestressing force is installed, grouting cable anchor is installed on lower curtate gob side entry coal column one side, utilize grouting cable anchor that coal column is implemented slip casting, the anchor point of grouting cable anchor is deep in the motionless district of coal column, coal column tunnel side coal body, coal column goaf side coal body displacement field and the motionless district of coal column are reinforced.
Beneficial effect: the present invention tunnels the roadway support of upper curtate so that the unified consideration of the roadway surrounding rock control measure during the work plane mining influence overall process to gob side entry, determine comprehensive gob side entry coal column stability control technology scheme, by " hale, short control, the long notes " Trinity coupling supporting control, be specially: during (1) upper curtate tunnelling, adopt high-strength prestressed twisted steel anchor rod tension coal column goaf side coal body in the coal column side.The performance of the high-strength prestressed twisted steel anchor rod of the upper curtate chain pillar side effect of " haling " can slow down coal column produces fracture area under the effect of lateral-supporting pressure scope, prevent the deterioration of coal column instability status, avoid anchor pole pallet and the body of rod occur drawing bad, problem such as break, bringing into play again for anchor pole behind the gob side entry driving that anchorage effect provides may.(2) during the lower curtate gob side entry driving, adopt the integrality of the whole displacement field of short anchor pole control coal column tunnel side in the chain pillar side.(3) during the lower curtate gob side entry driving, adopt long grouting cable anchor to reinforce anchor point in the chain pillar side, limit the growth of the interior absciss layer of whole displacement field.Short anchor pole and long grouting cable anchor " short control, the long notes " act on gives full play to the inefficacy that can effectively avoid coal column supporting and protection structure, brings into play the support capacity of leaving over anchor structure in the coal column again, to reach the common effect of safeguarding coal column stability.The present invention not only can effectively avoid the inefficacy of coal column supporting and protection structure, and in coal column, leave over the support capacity of anchor structure upper curtate roadway support can be brought into play again the time, has important directive significance for the maintenance of gob side entry driving coal column stability and roadway surrounding rock control, this method construction technology is easy, support material economy, supporting effect is remarkable, has practicality widely.
Description of drawings
Fig. 1 is principle schematic of the present invention.
Among the figure: 1-long grouting cable anchor, the short anchor pole of 2-prestressing force, 3-lower curtate work plane, 4-lower curtate gob side entry, 5-coal column tunnel side coal body, the motionless district of 6-coal column, 7-coal column goaf side coal body, 8-prestressing force twisted steel anchor rod, 9-upper curtate stope drift active workings, 10-upper curtate work plane goaf.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
1) in upper curtate stope drift active workings driving and supporting construction process, at upper curtate work plane goaf 10 overlying rocks as yet under the fully unstable situation, large deformation is carried out " haling, lack control, the long notes " Trinitarian coupling supporting along empty side chain pillar side, prestressing force twisted steel anchor rod 8 is installed on upper curtate stope drift active workings 9 coal columns one side; Utilize prestressing force twisted steel anchor rod 8 anchorage effects tension coal column tunnel side coal body 5;
2) in lower curtate gob side entry driving process, can carry out lower curtate work plane 3 gob side entry drivings under the abundant unstable situation as yet at upper curtate work plane goaf 10 overlying rocks, the short anchor pole 2 of prestressing force is installed on lower curtate gob side entry 4 coal columns one side, adopt and lengthen anchorage style, the stability of coal column is by motionless district 6 controls of gob side entry driving coal column, be that horizontal movement changes very small region in the gob side entry driving coal column, its coal body integrality all needs to be guaranteed, and no longer produces big absciss layer;
3) in lower curtate work plane 3 gob side entry driving processes, when the short anchor pole of gob side entry driving coal column side prestressing force 2 is installed, long grouting cable anchor 1 is installed on lower curtate gob side entry 4 coal columns one side, utilize 1 pair of coal column of long grouting cable anchor to implement slip casting, its anchor point should be deep in the motionless district 6 of coal column, so that coal column tunnel side coal body 5, coal column goaf side coal body 7 displacement fields and the motionless district 6 of coal column are reinforced; Make the coupling supporting that formation bolting with wire mesh and bolt-grouting support replace between lower curtate gob side entry driving coal column tunnel side and the goaf side by being used of the short anchor pole 2 of prestressing force twisted steel anchor rod 8, prestressing force and long grouting cable anchor 1, finish at lower curtate gob side entry driving and lower curtate working face extraction.

Claims (1)

1. a gob side entry driving coal column stability Trinity coupling supporting control method is characterized in that comprising the steps:
A, in upper curtate stope drift active workings drivings and supporting construction process, at upper curtate work plane goaf (10) overlying rock as yet under the fully unstable situation, in upper curtate stope drift active workings (9) coal column one side many prestressing force twisted steel anchor rods (8) are installed, are utilized prestressing force twisted steel anchor rod (8) anchorage effect tension coal column tunnel side coal body (5);
B, in lower curtate gob side entry driving process, carry out lower curtate work plane (3) gob side entry driving, at the short anchor pole (2) of lower curtate gob side entry (4) coal column one side prestressed, adopt to lengthen anchorage style;
C, in lower curtate work plane (3) gob side entry driving process, when the gob side entry driving coal column side short anchor pole of prestressing force (2) is installed, grouting cable anchor (1) is installed on lower curtate gob side entry (4) coal column one side, utilize grouting cable anchor (1) that coal column is implemented slip casting, the anchor point of grouting cable anchor (1) is deep in the motionless district of coal column (6), coal column tunnel side coal body (5), coal column goaf side coal body (7) displacement field and the motionless district of coal column (6) are reinforced.
CN201310173332.5A 2013-05-13 2013-05-13 Trinity coupling support stability control method for gob-side entry-driving coal pillar CN103244122B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899342A (en) * 2014-04-15 2014-07-02 中国矿业大学(北京) Gob-side entrydriving coal pillar anchor cable through reinforcing method
CN104533482A (en) * 2014-10-28 2015-04-22 淮浙煤电有限责任公司顾北煤矿分公司 Reinforcing method for improving stability of gob-side entry driving small coal pillar
CN104712348A (en) * 2014-12-11 2015-06-17 山东科技大学 Large-mining-height working face gob-side small pillar roadway supporting method under hard immediate roof
CN105422128A (en) * 2015-12-14 2016-03-23 山东科技大学 Method for preventing goaf gas leakage in deep shaft gob-side entry driving
CN108049899A (en) * 2017-12-06 2018-05-18 中国矿业大学(北京) A kind of gob side entry driving thin coal pillar breaking surrounding rock reinforcement means
CN108060921A (en) * 2017-11-30 2018-05-22 山西工程技术学院 The high seam gob side entry ground coal recovery method of distension effect is caused based on thin coal pillar
WO2018133492A1 (en) * 2017-01-23 2018-07-26 山东科技大学 Non-uniform support structure for gob-side entry driving under deep unstable overburden rock and construction method
CN108757022A (en) * 2018-05-29 2018-11-06 中国煤炭地质总局勘查研究总院 The restorative procedure of mined-out region
CN111365021A (en) * 2020-03-26 2020-07-03 中国矿业大学(北京) Pre-grouting solidification method for narrow coal pillars of fully mechanized caving coal roadway
CN111364995A (en) * 2020-03-26 2020-07-03 中国矿业大学(北京) Construction method of fully mechanized caving coal roadway stable roof-coal pillar structure

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CN101122235A (en) * 2007-10-31 2008-02-13 中国矿业大学 Method for controlling wall rock of fully mechanized coal face goaf side coalbed laneway

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899342A (en) * 2014-04-15 2014-07-02 中国矿业大学(北京) Gob-side entrydriving coal pillar anchor cable through reinforcing method
CN104533482A (en) * 2014-10-28 2015-04-22 淮浙煤电有限责任公司顾北煤矿分公司 Reinforcing method for improving stability of gob-side entry driving small coal pillar
CN104712348A (en) * 2014-12-11 2015-06-17 山东科技大学 Large-mining-height working face gob-side small pillar roadway supporting method under hard immediate roof
CN104712348B (en) * 2014-12-11 2019-03-29 山东科技大学 Large-mining-height working surface is along empty fender laneway support method under the hard direct top of one kind
CN105422128A (en) * 2015-12-14 2016-03-23 山东科技大学 Method for preventing goaf gas leakage in deep shaft gob-side entry driving
WO2018133492A1 (en) * 2017-01-23 2018-07-26 山东科技大学 Non-uniform support structure for gob-side entry driving under deep unstable overburden rock and construction method
US10443380B2 (en) 2017-01-23 2019-10-15 Shandong University Of Science And Technology Asymmetric support structure of entry driven along gob-side under unstable roof in deep mines and construction method thereof
CN108060921A (en) * 2017-11-30 2018-05-22 山西工程技术学院 The high seam gob side entry ground coal recovery method of distension effect is caused based on thin coal pillar
CN108060921B (en) * 2017-11-30 2020-11-24 山西工程技术学院 Thick coal seam gob-side roadway bottom coal recovery method based on narrow coal pillar heave effect
CN108049899A (en) * 2017-12-06 2018-05-18 中国矿业大学(北京) A kind of gob side entry driving thin coal pillar breaking surrounding rock reinforcement means
CN108757022A (en) * 2018-05-29 2018-11-06 中国煤炭地质总局勘查研究总院 The restorative procedure of mined-out region
CN111364995A (en) * 2020-03-26 2020-07-03 中国矿业大学(北京) Construction method of fully mechanized caving coal roadway stable roof-coal pillar structure
CN111365021A (en) * 2020-03-26 2020-07-03 中国矿业大学(北京) Pre-grouting solidification method for narrow coal pillars of fully mechanized caving coal roadway
CN111364995B (en) * 2020-03-26 2021-02-12 中国矿业大学(北京) Construction method of fully mechanized caving coal roadway stable roof-coal pillar structure

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