CN101899987B - Coal mine roadway deep support construction method - Google Patents

Coal mine roadway deep support construction method Download PDF

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Publication number
CN101899987B
CN101899987B CN2010102472210A CN201010247221A CN101899987B CN 101899987 B CN101899987 B CN 101899987B CN 2010102472210 A CN2010102472210 A CN 2010102472210A CN 201010247221 A CN201010247221 A CN 201010247221A CN 101899987 B CN101899987 B CN 101899987B
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CN
China
Prior art keywords
plane
hole
boss
strip
steel
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CN2010102472210A
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Chinese (zh)
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CN101899987A (en
Inventor
孔令增
孔祥清
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孔祥清
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Priority to CN201010300679.8 priority
Application filed by 孔祥清 filed Critical 孔祥清
Priority to CN2010102472210A priority patent/CN101899987B/en
Publication of CN101899987A publication Critical patent/CN101899987A/en
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Publication of CN101899987B publication Critical patent/CN101899987B/en

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Abstract

The invention discloses a coal mine roadway deep support construction method, which comprises the following steps: 1, drilling 4 to 6 holes on the top part of a roadway which is 5 meters wide and 2.9 meters high; 2, filling an anchoring agent in the deep holes; 3, inserting one end of each of left-handed steel strands into each hole, and using a jumbolter to drive the steel strands to rotate rightward to allow the steel strands to be mixed with the anchoring agent fully, wherein the steel strands which advance by rotating rightward make the anchoring agent firmly coated on and stuck to the left-handed steel strands; 4, making conical through holes in a long steel strip, filling 3 arc-shaped locking blocks into the conical through holes and placing the other end of each of the steel strands in each cavity to lock each steel strand tightly; and 5, adhering the long steel strip on the top part of the roadway, so that the pressure applied by a coal layer or a rock layer can be transferred by the steel strands in a whole anchoring section to the whole long steel strip to make the long steel strip from an arc-shaped support under stress. The method is suitable for deep support; the formed arch shape bears an applied force and distributes and relieves direct vertical pressure and impact applied onto a top plate to prevent pucking; and thus, the problem of the prior art is solved.

Description

A kind of coal mine roadway deep support construction method

Technical field

The present invention relates to colliery tunnel support, is a kind of coal mine roadway deep support construction method.

Background technology

The supporting quality of coal mine roadway is the important assurance of Safety of Coal Mine Production.Existing coal mine roadway all adopts steel band and bolt support, because top board height restriction rock-bolt length can not be used for deep support, for this reason, the applicant studied a kind of device of deep support that is used in order to substitute anchor pole, through using proving effect better in 2006.But, though the improvement of suspension device structure have many good qualities, yet, when exploiting with the big machinery extractive equipment, span length increases, and head-room is generally about 2.8 meters, soft rock, soft seam are in the colliery deep again at this moment, use existing construction method for supporting seldom to arrive high strength support.For this reason, this area adopts fallaway type to arrange that anchor cable monomer construction method for supporting is used to gain in strength.The deficiency of this method is: disjunctor supporting intensity roof stability is not difficult improves, under back production and dynamic pressure influence, the two ends supporting that fallaway type is arranged makes roof break, base plate heave inefficacy easily, cause back production supporting difficulty bigger, the back production fltting speed is reduced, sometimes need to install 2-3 temporary lining and planted agent, under time-consuming prerequisite of taking a lot of work, safety in production is more difficult to get guarantee.

Summary of the invention

The purpose of this invention is to provide a kind of coal mine roadway deep support construction method, it is applicable to deep support, and the carrying of the arch of formation is stressed, can disperse to alleviate directly top board pressure at right angle, impact force and causes pucking, thereby solve the problem that prior art exists.

The present invention is achieved through the following technical solutions for achieving the above object: a kind of coal mine roadway deep support construction method may further comprise the steps:

1. be 5 meters, highly be that 4-6 hole bored at 2.9 meters top, tunnel at width, the degree of depth 4-6 rice in hole, apart from being 0.8-1.2 rice, the diameter in hole is the 25-28 millimeter between per two holes;

2. the anchoring agent is inserted in the hole;

3. get length and be 4.5-6.5 rice, diameter and be the left-handed steel hinge line of 18 millimeters or 22 millimeters, steel strand one end is squeezed in the hole, adopting jumbolter to drive steel strand dextrorotation rotates, itself and anchoring agent are fully stirred, the steel strand that dextrorotation advances firmly bond the anchoring agent and adhere on the left-handed steel strand, anchoring agent and steel hinge line coherence length are anchoring section, and anchoring section length is 2.0-4.0 rice, and the bottom of anchoring section length is more than 2 meters far from top, tunnel distance;

4. get the strip steel band, on steel band, offer conical through-hole, with 3 the arcuation latch segments of packing in the conical through-hole, each latch segment external surface is the inclined-plane, inner surface is to be faced directly, and screw thread all is set on the inner surface of each latch segment, and 3 arcuation latch segments surround the truncated cone, truncated cone middle part is a cavity, and steel hinge line one end is inserted in this cavity and is locked;

5. the strip steel band is attached to the top, tunnel, coal seam or rock pressure are delivered on the whole anchoring section steel strand, pass to the strip steel band on the whole by steel strand, force-bearing situation forms arch support body.

4. described strip steel band middle part is provided with boss in the step, boss runs through the whole length of strip steel band, boss two bottoms are connected with the highest point of first inclined-plane with second inclined-plane respectively, at least offer 2 strip grooves on the length direction at the boss back side, two openends of strip groove are connected with first plane and second plane are inner respectively, the outward extending gradually outer end edges in the outer end on first plane and first inclined-plane is along intersecting, the outward extending gradually outer end edges in the outer end on second plane and second inclined-plane is along intersecting, be provided with one between per two strip grooves and support entity, the plane of support entity and first plane and second plane are in the same plane, or the plane of supporting entity is lower than first plane and second plane, or the plane of supporting entity is higher than first plane and second plane, support on the entity and offer through hole, supporting entity is that arcuation is connected with strip groove connection.Conical through-hole is opened in and supports on the entity, and the outside diameter of conical through-hole is positioned at place, boss plane.The length L that supports entity is the 60-120 millimeter.The height of each latch segment is the 40-49.5 millimeter, and the cavity diameter at truncated cone middle part is the 16.5-23.5 millimeter.Be in the back production construction in the tunnel, at the boss place of strip steel band individual prop be installed, the individual prop end face is offered groove, and groove is stuck on boss 1 outer wall.The height H 3 of boss is 21-40 millimeters, and the thickness H2 of the boss of strip groove is the 6-12 millimeter.

Good effect of the present invention is embodied in following several respects: the roadway deep support of finishing with this job practices, coal seam or rock pressure are delivered on the whole anchoring section steel strand, and pass to the strip steel band on the whole by steel hinge line, its force-bearing situation can form arch support body, pressure is outwards disperseed along arch, can stop, disperse dynamic pressure influence and destruction, supporting intensity is improved a lot, and the method very convenient, of the present invention of constructing is the unique safe and reliable method of rousing supporting at present at soft rock, cherry coal, the anti-base plate of dark mine.

When job practices of the present invention can make the whole supporting intensity of deep support significantly improve, the problem that the supporting of the tunnel two ends when having avoided back production was lost efficacy, and make prior art back timber need be installed when back production, set up for canopy, dismounting for all method abolishes such as canopies, the present invention directly is installed in individual prop the strip steel band when back production boss place gets final product, thereby the back production construction speed has been improved about 90%, cost has been reduced about 60%.

Description of drawings

Accompanying drawing 1 is the strip steel band structural representation that uses in the job practices of the present invention; Accompanying drawing 2 is A-A sectional structure schematic diagrames in the accompanying drawing 1; Accompanying drawing 3 is B-B section structure for amplifying schematic diagrames in the accompanying drawing 2; Accompanying drawing 4 is that C-C analyses and observe the structure for amplifying schematic diagram in the accompanying drawing 2; Accompanying drawing 5 is steel strand and strip steel band assembling schematic diagrames in the job practices of the present invention; Accompanying drawing 6 be in the accompanying drawing 5 D to the structure for amplifying schematic diagram; Accompanying drawing 7 is individual prop scheme of installations during back production in the job practices of the present invention; Accompanying drawing 8 be in the accompanying drawing 7 E to the structure for amplifying schematic diagram; Accompanying drawing 9 is deep-well supporting arch bearing capacity schematic diagrames that job practices of the present invention forms.

The specific embodiment

Job practices of the present invention may further comprise the steps:

1. be 5 meters, highly be that 4-6 hole bored at 2.9 meters top, tunnel at width, the degree of depth 4-6 rice in hole, apart from being 0.8-1.2 rice, the diameter in hole is the 25-28 millimeter between per two holes;

2. the anchoring agent is inserted in the hole;

3. get length and be 4.5-6.5 rice, diameter and be the left-handed steel hinge line of 18 millimeters or 22 millimeters, steel strand one end is squeezed in the hole, adopt jumbolter drive steel strand and anchoring agent fully to stir, the steel strand that dextrorotation advances firmly bond the anchoring agent and adhere on the left-handed steel strand, anchoring agent and steel hinge line adhesion highly are anchoring section, anchoring section length is 2.0-4.0 rice, and the bottom of anchoring section length is more than 2 meters far from top, tunnel distance;

4. get the strip steel band, on steel band, open conical through-hole, with 3 the arcuation latch segments 9 of packing in the conical through-hole, each latch segment 9 external surface is the inclined-plane, inner surface is to be faced directly, 11,3 arcuation latch segments 9 of screw thread all is set on the inner surface of each latch segment 9 surrounds the truncated cone, truncated cone middle part is a cavity, and steel hinge line 10 other ends are inserted in this cavity and are locked;

5. the strip steel band is attached to the top, tunnel, coal seam or rock pressure are delivered on the whole anchoring section steel strand, pass to the strip steel band on the whole by steel strand, force-bearing situation forms arch support body.The deep-well supporting that forms according to the inventive method construction back is the distribution of arch bearing capacity, as shown in Figure 9.It has replaced bolt support and has made coal (rock) carrying enlarged in thickness, has produced an arch from anti-donor, can stop, disperse to alleviate to top board pressure at right angle and impact, avoids the generation of wall caving and pucking phenomenon.The advantage of the latch segment that uses in the job practices of the present invention is outstanding, supporting intensity is further increased, because latch segment can closely be attached in the taper hole that supports entity 5, also can wrap steel strand simultaneously, form stable support, steel hinge line is advanced with the anchoring agent in greater than the deep hole more than 2 meters in rock stratum or coal seam fully to be stirred in minimum gap, after making the anchoring agent firmly bond steel hinge line, the other end of steel strand can be locked fast, and piece is tight highly locks, and bearing capacity is passed to the support entity, and then bearing capacity is distributed on the strip steel band.Job practices of the present invention is when stope drift active workings tunnel, individual prop is supported on the boss position of strip steel band, article one, 4-6 individual prop is installed on the boss of strip steel band to be supported, move towards into hundred individual props during back production and be arranged as 2-3 row, general every row supports 2-4 row individual prop, after coal face progressively advances, will back row's individual prop lay down and move forward a row again and be supported on the strip steel band, its concrete job practices is in tunnel back production construction, individual prop 12 is installed at boss 1 place at the strip steel band, individual prop 12 end faces are offered groove 13, and groove 13 is stuck on boss 1 outer wall.Job practices of the present invention is melted the construction of the supporting at top, tunnel and stope drift active workings and is a kind of method, and the colliery driving speed is increased substantially.This structure can be used in when substituting in the prior art back production, back timber is installed, is set up for canopy and dismounting are extremely loaded down with trivial details for canopy etc., labour intensity big, the technical scheme of construction large contingent, under the high prerequisite of safety, cost of production is reduced significantly, construction speed is significantly accelerated.

Because crackle appears in existing steel band in supporting, boss is torn and phenomenon such as steel band fracture, so, in the job practices of the present invention the steel band structure is improved, in order to reach better supporting effect, the steel band structure of using in job practices is: strip steel band middle part is provided with boss 1, boss 1 runs through the whole length of strip steel band, 1 liang of bottom of boss is connected with the highest point on first inclined-plane 3 and second inclined-plane 2 respectively, at least offer 2 strip grooves 4 on the length direction at boss 1 back side, 4 two openends of strip groove are connected with first plane 7 and 8 the inners, second plane respectively, the outward extending gradually outer end edges in the outer end on first plane 7 and first inclined-plane 3 is along intersecting, the outward extending gradually outer end edges in the outer end on second plane 8 and second inclined-plane 2 is along intersecting, be provided with one between per two strip grooves 4 and support entity 5, the plane of support entity 5 and first plane 7 and second plane 8 are in the same plane, or the plane of supporting entity 5 is lower than first plane 7 and second plane 8, or the plane of supporting entity 5 is higher than first plane 7 and second plane 8, support on the entity 5 and offer through hole 6, supporting entity 5 is that arcuation is connected with strip groove 4 connections.The steel band of this structure can make steel band crackle, boss not occur in supporting in the job practices of the present invention and back production phenomenon not occur tearing, phenomenon of rupture does not appear in steel band yet, and kept simultaneously the steel band boss elasticity, cushion bearing capacity and be close to the various performances of top board.

The further scheme of the present invention is as follows: for the ease of the locking steel strand, increase supporting intensity, conical through-hole is opened in supports on the entity 5, the outside diameter of conical through-hole is positioned at place, boss 1 plane.

Further studies show that, the length L that supports entity 5 is the 60-120 millimeter, be that to be used for deep support safe, in light weight, the key element that strip steel band bulk strength is equated substantially, when it can realize carrying top pressure, pressure is passed on the whole strip steel band by supporting entity, makes the strip steel band whole stressed even.

The height of each latch segment 9 of the present invention is the 40-49.5 millimeter, and the cavity diameter at the truncated cone middle part that 3 latch segments surround is the 16.5-23.5 millimeter, and this is the best key element that further guarantees high security, reaches supporting effect.

The height H 3 of boss 1 of the present invention is 21-40 millimeters, and the thickness H2 of the boss 1 at strip groove 4 places is 6-12 millimeters, and this size factor can further satisfy the matching structure that bearing capacity is 330-570KN.H1 is the height of strip steel band among the figure.

Claims (7)

1. coal mine roadway deep support construction method is characterized in that: may further comprise the steps:
1. be 5 meters, highly be that 4-6 hole bored at 2.9 meters top, tunnel at width, the degree of depth 4-6 rice in hole, apart from being 0.8-1.2 rice, the diameter in hole is the 25-28 millimeter between per two holes;
2. the anchoring agent is inserted in the hole;
3. get length and be 4.5-6.5 rice, diameter and be the left-handed steel hinge line of 18 millimeters or 22 millimeters, steel strand one end is squeezed in the hole, adopting jumbolter to drive steel strand dextrorotation rotates, itself and anchoring agent are fully stirred, the steel strand that dextrorotation advances firmly bond the anchoring agent and adhere on the left-handed steel strand, anchoring agent and steel hinge line coherence length are anchoring section, and anchoring section length is 2.0-4.0 rice, and the bottom of anchoring section length is more than 2 meters far from top, tunnel distance;
4. get the strip steel band, on steel band, offer conical through-hole, with 3 the arcuation latch segments (9) of packing in the conical through-hole, each latch segment (9) external surface is the inclined-plane, inner surface is to be faced directly, and screw thread (11) all is set on the inner surface of each latch segment (9), and 3 arcuation latch segments (9) surround the truncated cone, truncated cone middle part is a cavity, and steel hinge line (10) one ends are inserted in this cavity and are locked;
5. the strip steel band is attached to the top, tunnel, coal seam or rock pressure are delivered on the whole anchoring section steel strand, pass to the strip steel band on the whole by steel strand, force-bearing situation forms arch support body.
2. a kind of coal mine roadway deep support construction method according to claim 1, it is characterized in that: 4. described strip steel band middle part is provided with boss (1) in the step, boss (1) runs through the whole length of strip steel band, boss (1) two bottom is connected with first inclined-plane (3) highest point with second inclined-plane (2) respectively, at least offer 2 strip grooves (4) on the length direction at boss (1) back side, (4) two openends of strip groove are connected with first plane (7) and second plane (8) are inner respectively, the outward extending gradually outer end edges in the outer end on first plane (7) and first inclined-plane (3) is along intersecting, the outward extending gradually outer end edges in the outer end on second plane (8) and second inclined-plane (2) is along intersecting, be provided with one between per two strip grooves (4) and support entity (5), plane and first plane (7) and second plane (8) of supporting entity (5) are in the same plane, or the plane of supporting entity (5) is lower than first plane (7) and second plane (8), or the plane of supporting entity (5) is higher than first plane (7) and second plane (8), support on the entity (5) and offer through hole (6), supporting entity (5) is that arcuation is connected with strip groove (4) connection.
3. a kind of coal mine roadway deep support construction method according to claim 2 is characterized in that: conical through-hole is opened in and supports on the entity (5), and the outside diameter of conical through-hole is positioned at place, boss (1) plane.
4. a kind of coal mine roadway deep support construction method according to claim 2 is characterized in that: the length L that supports entity (5) is the 60-120 millimeter.
5. a kind of coal mine roadway deep support construction method according to claim 1 is characterized in that: the height of each latch segment (9) is the 40-49.5 millimeter, and the cavity diameter at truncated cone middle part is the 16.5-23.5 millimeter.
6. a kind of coal mine roadway deep support construction method according to claim 2, it is characterized in that: be in the back production construction in the tunnel, boss (1) at the strip steel band locates to install individual prop (12), individual prop (12) end face is offered groove (13), and groove (13) is stuck on boss (1) outer wall.
7. a kind of coal mine roadway deep support construction method according to claim 2 is characterized in that: the height H 3 of boss (1) is 21-40 millimeters, and the thickness H2 of the boss (1) that strip groove (4) is located is the 6-12 millimeter.
CN2010102472210A 2010-01-25 2010-08-06 Coal mine roadway deep support construction method CN101899987B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201010300679 2010-01-25
CN201010300679.8 2010-01-25
CN2010102472210A CN101899987B (en) 2010-01-25 2010-08-06 Coal mine roadway deep support construction method

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Application Number Priority Date Filing Date Title
CN2010102472210A CN101899987B (en) 2010-01-25 2010-08-06 Coal mine roadway deep support construction method

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CN101899987B true CN101899987B (en) 2011-11-30

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182483A (en) * 2011-04-26 2011-09-14 山东大学 Semi-rigid abnormal beam anchor cable truss roadway supporting system
CN103216244B (en) * 2013-03-19 2014-11-19 中国矿业大学 Roadway soft and weak top plate anchoring beam-arch combined structure support system and support method
CN103321655B (en) * 2013-06-27 2015-05-13 辽宁工程技术大学 Roadway floor reinforcement method with functions of horizontal yielding and energy absorption
CN104790991B (en) * 2015-04-28 2016-11-23 河南理工大学 A kind of surrounding rock of actual mining roadway long top anchoring process by force

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1594834A (en) * 2004-07-12 2005-03-16 中国矿业大学 Truss supporting technology for ingredient top slope deformation control
CN2729315Y (en) * 2004-08-04 2005-09-28 成都四海岩土工程有限公司 Pressure dispersed cable
KR100638645B1 (en) * 2005-11-04 2006-10-31 심석래 A rock anchor for multistage grouting
CN1888326A (en) * 2006-07-26 2007-01-03 中冶沈勘工程技术有限公司 Two-purpose boring bar and hole-protecting casing soil anchor bolt boring technology
CN201050303Y (en) * 2007-04-04 2008-04-23 沈阳中建东设岩土工程有限公司 Self-dumping cone type spiral anchor drill bit
KR20090026867A (en) * 2007-09-11 2009-03-16 주식회사 상명스틸 Rock bolt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1594834A (en) * 2004-07-12 2005-03-16 中国矿业大学 Truss supporting technology for ingredient top slope deformation control
CN2729315Y (en) * 2004-08-04 2005-09-28 成都四海岩土工程有限公司 Pressure dispersed cable
KR100638645B1 (en) * 2005-11-04 2006-10-31 심석래 A rock anchor for multistage grouting
CN1888326A (en) * 2006-07-26 2007-01-03 中冶沈勘工程技术有限公司 Two-purpose boring bar and hole-protecting casing soil anchor bolt boring technology
CN201050303Y (en) * 2007-04-04 2008-04-23 沈阳中建东设岩土工程有限公司 Self-dumping cone type spiral anchor drill bit
KR20090026867A (en) * 2007-09-11 2009-03-16 주식회사 상명스틸 Rock bolt

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