CN102505949A - Support method for coal seam roadway to cross gob - Google Patents

Support method for coal seam roadway to cross gob Download PDF

Info

Publication number
CN102505949A
CN102505949A CN2011103617940A CN201110361794A CN102505949A CN 102505949 A CN102505949 A CN 102505949A CN 2011103617940 A CN2011103617940 A CN 2011103617940A CN 201110361794 A CN201110361794 A CN 201110361794A CN 102505949 A CN102505949 A CN 102505949A
Authority
CN
China
Prior art keywords
goaf
heading
support
ductule
gob
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.)
Granted
Application number
CN2011103617940A
Other languages
Chinese (zh)
Other versions
CN102505949B (en
Inventor
于喜东
李风珍
王东
贾存华
陈军胜
孙春伟
郑铜镖
韩浩
孔金龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Science & Technology Research Co Ltd Of Shanxi Coal Transportation & Sales Group
Original Assignee
Science & Technology Research Co Ltd Of Shanxi Coal Transportation & Sales Group
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Science & Technology Research Co Ltd Of Shanxi Coal Transportation & Sales Group filed Critical Science & Technology Research Co Ltd Of Shanxi Coal Transportation & Sales Group
Priority to CN 201110361794 priority Critical patent/CN102505949B/en
Publication of CN102505949A publication Critical patent/CN102505949A/en
Application granted granted Critical
Publication of CN102505949B publication Critical patent/CN102505949B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

A support method for a coal seam roadway to cross a gob belongs to the technical field of roadway supporting for coal measure strata and utilizes combination of temporary support and permanent support. The support method is characterized in that the temporary support includes applying an alternating-current field after double-slurry is grouted into small ducts, increasing scattering radius of the slurry under electric effect of electro-osmosis and electrophoresis, filling the double-slurry into holes and slits inside regenerated surrounding rock of the gob sufficiently so as to reinforce of the regenerated surrounding rock of the gob again, and finally forming the integrated surrounding rock. The support method aims to increase integral strength, stability and self-bearing capacity of the regenerated surrounding rock of the gob. The integral strength of the regenerated surrounding rock of the gob is increased by at least 230% by using the support method as compared with the existing support method for the coal seam roadway to cross the gob.

Description

A kind of heading is crossed the supporting method in goaf
Technical field
A kind of heading of the present invention is crossed the supporting method in goaf; The technological category that belongs to coal measure strata roadway support; Specifically be a kind ofly to add under the AC field effect method of the heading of crossing the goaf being carried out temporary lining and permanent support, purpose is to improve goaf regenerate country rock bulk strength, stability and self-bearing capacity.
Background technology
Along with the day by day increase of national economy to coal demand, coal production rises year by year, and coal mining intensity continues to increase.When coal resources are integrated; A merging and reorganization mine often is made up of several small coal mines; These little kilns do not fill owing to only adopting when cutting coal resource, selection of mining is improper, the goaf is handled untimely and destroy reason such as safety pillar, have stayed a large amount of goafs.The time that little kiln exploitation forms the dead zone is generally more remote; Distortion and migration have taken place in the goaf overlying rock, and institute's spacing is in the state of filling up basically, but unlike such firm the enriching of protolith; There are big metering-orifice, crack; The local location that is not filled with that also exists, goaf country rock demonstrate that soft broken, stability and less robust, stress are concentrated, underground water guide gushing water passage is many and characteristics such as supporting capacity is weak, and this brings very big difficulty for roadway support of merging and reorganization mine.Therefore, heading is crossed the goaf supporting also just becomes the major issue that the merging and reorganization mine is faced.
Little kiln has destroyed the protolith equipoise after primary recovery, make the goaf stress of primary rock change; And for equilibrium establishment redistributes, when reaching critical condition, surrounding rock failure will take place and move; Along with the coal mining scope constantly enlarges, country rock is further destroyed and is moved, and causes the rock mass avalanche; Cause accidents such as large tracts of land roof collapse and country rock move, brought serious potential safety hazard to the colliery safety in production.The essence of goaf supporting is to shift surrouding rock stress to concentrate the position, relaxes stress concentration degree, makes stress reach new relative equilibrium, presses with control and management ground, guarantees Safety of Coal Mine Production.Existing heading supporting method is mainly high strength frame, concrete anti-arch, stone cornering arch, the spray supporting of anchor net and slip casting sealing and reinforcing etc.To the influence of goaf overlying rock caving zone, slit band and integrally bending band to the goaf surrounding rock stability; When, dynamic pressure serious when goaf surrouding rock deformation displacement concentrated, above-mentioned support pattern can not satisfy the surrounding rock stability requirement that heading is crossed the goaf.
Summary of the invention
A kind of heading of the present invention is crossed the supporting method in goaf; Purpose is to overcome the deficiency and the defective of prior art; Propose heading under a kind of AC field effect and cross the supporting method in goaf, thereby improve goaf regeneration country rock bulk strength, stability and self-bearing capacity.
A kind of heading of the present invention is crossed the supporting method in goaf; It is characterized in that it being a kind ofly the heading of crossing the goaf to be carried out the method that temporary lining and permanent support combine adding under the AC field effect; This method is crossed the goaf with heading exactly and is carried out temporary lining earlier, in the after-applied AC field of ductule two fluid grouting, under the effect of electric osmose and electrophoresis electrokinesis; Increase grout spreading range; Carry out permanent support again, mode is spray of anchor net or stone cornering arch, and concrete step is:
I, elder generation carry out temporary lining to the regeneration country rock 1 of the goaf beyond heading 2 outline lines, and being 10 °~30 ° according to outer limb is that 600~1200mm squeezes into ductule 3 in advance with circumferential distance, and ductule length is 1600~2600mm;
II, build the AC field filling system, the critical piece of this system comprises goaf regeneration country rock 1, heading 2, ductule 3, biliquid slurry 4 and AC field 5;
III, in ductule 3, inject biliquid slurry 4, add AC field 5, voltage is 660~1140V, and adulterant is acidic electrolyte bath Na 2SiO 3, Na 2SO 4, NaCl, Na 3PO 4, concentration is 0~410gl -1
IV, when grout spreading range during greater than 2m, stop the AC field effect, again goaf regeneration country rock 1 is carried out permanent support, mode is spray of anchor net or stone cornering arch.
The supporting method that heading is crossed the goaf under a kind of AC field effect of the present invention is compared with existing heading supporting method, has following outstanding substantive distinguishing features and significant effect:
1, heading is crossed the supporting method in goaf under a kind of AC field effect of the present invention; Be the supporting method that a kind of temporary lining and permanent support combine, it is characterized in that temporary lining is in the after-applied AC field of ductule two fluid grouting, under the effect of electrokinesises such as electric osmose and electrophoresis; Increase grout spreading range; Make biliquid starch inner hole, the crack of abundant bashing regeneration country rock, goaf regeneration country rock is reinforced again, make it form the supporting method of whole country rock;
2, heading is crossed the supporting method in goaf under a kind of AC field effect of the present invention, and under the AC field effect, grout spreading range is greater than 2m behind the two fluid grouting, and goaf regeneration country rock bulk strength improves more than 230%;
3, heading is crossed the supporting method in goaf under a kind of AC field effect of the present invention, is widely used in aspects such as shaft construction in the coal mine mining operation, development work construction, preparatory working construction, Chamber Construction.
Description of drawings
Fig. 1 crosses the AC field arrangement in the supporting of goaf for heading.
Among the figure: goaf regeneration country rock 1, heading 2, ductule 3, biliquid slurry 4 and AC field 5, be designated the ductule 3 of a and a end of AC field 5 and be connected, be designated the ductule 3 of b and the b end of AC field 5 and be connected.Fig. 1 (a) is that the AC field that heading is crossed in the supporting of goaf is arranged elevation; Fig. 1 (b) is that the AC field that heading is crossed in the supporting of goaf is arranged lateral view.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Embodiment 1:
The supporting method of being crossed the goaf by heading under the AC field effect of the present invention carries out supporting to the shaft station of crossing the goaf.The supporting process is:
I, elder generation are to certain ore deposit 15 #Goaf regeneration country rock beyond the outline line of shaft station, coal seam carries out temporary lining, and being 15 ° according to outer limb is that 600mm squeezes into ductule in advance with circumferential distance, and ductule length is 1600mm;
II, build the AC field filling system, the critical piece of this system comprises goaf regeneration country rock, shaft station, ductule, cement paste and AC field;
III, in ductule, inject cement paste, add AC field, voltage is 660V, and adulterant is acidic electrolyte bath Na 2SiO 3, concentration is 32gl -1
IV, when grout spreading range during greater than 2.5m, stop the AC field effect, again goaf regeneration country rock is carried out permanent support, support pattern is a stone cornering arch.
Goaf regeneration country rock bulk strength improves 260%.
Embodiment 2: cross AC field arrangement in the supporting of goaf to certain ore deposit 15 according to heading shown in Figure 1 #Temporary lining is carried out in assistant conveyance lane, exploiting field, coal seam, and the outer limb of ductule is 10 °, and ductule length is 2000mm, and permanent support is anchor net spray supporting, and goaf regeneration country rock bulk strength improves 350%.Other is with embodiment 1.
Embodiment 3: cross AC field arrangement in the supporting of goaf to certain ore deposit 15 according to heading shown in Figure 1 #Exploiting field, coal seam return airway carries out temporary lining, and ductule length is 2200mm, and permanent support is a bolting with wire mesh, and goaf regeneration country rock bulk strength improves 280%.Other is with embodiment 1.

Claims (1)

1. a heading is crossed the supporting method in goaf, it is characterized in that it being a kind ofly the heading of crossing the goaf to be carried out the method that temporary lining and permanent support combine adding under the AC field effect, and this method is crossed the goaf with heading exactly and carried out temporary lining earlier; In the after-applied AC field of ductule two fluid grouting; Under the effect of electric osmose and electrophoresis electrokinesis, increase grout spreading range, carry out permanent support again; Mode is spray of anchor net or stone cornering arch, and concrete step is:
I, elder generation carry out temporary lining to the regeneration country rock 1 of the goaf beyond heading 2 outline lines, and being 10 °~30 ° according to outer limb is that 600~1200mm squeezes into ductule 3 in advance with circumferential distance, and ductule length is 1600~2600mm;
II, build the AC field filling system, the critical piece of this system comprises goaf regeneration country rock 1, heading 2, ductule 3, biliquid slurry 4 and AC field 5;
III, in ductule 3, inject biliquid slurry 4, add AC field 5, voltage is 660~1140V, and adulterant is acidic electrolyte bath Na 2SiO 3, Na 2SO 4, NaCl, Na 3PO 4, concentration is 0~410gl -1
IV, when grout spreading range during greater than 2m, stop the AC field effect, again goaf regeneration country rock 1 is carried out permanent support, mode is spray of anchor net or stone cornering arch.
CN 201110361794 2011-11-12 2011-11-12 Support method for coal seam roadway to cross gob Active CN102505949B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110361794 CN102505949B (en) 2011-11-12 2011-11-12 Support method for coal seam roadway to cross gob

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110361794 CN102505949B (en) 2011-11-12 2011-11-12 Support method for coal seam roadway to cross gob

Publications (2)

Publication Number Publication Date
CN102505949A true CN102505949A (en) 2012-06-20
CN102505949B CN102505949B (en) 2013-10-30

Family

ID=46218077

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201110361794 Active CN102505949B (en) 2011-11-12 2011-11-12 Support method for coal seam roadway to cross gob

Country Status (1)

Country Link
CN (1) CN102505949B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103485808A (en) * 2013-10-12 2014-01-01 山东科技大学 Electro-osmosis home position modified roadway anchoring method of underground swelling soft rock
CN104314583A (en) * 2014-09-03 2015-01-28 山西煤炭运销集团晋城有限公司 Support method of coal seam roadway empty area
CN105927243A (en) * 2016-06-21 2016-09-07 山东科技大学 Device and method for supporting downhole surrounding rock faults
CN109184752A (en) * 2018-09-29 2019-01-11 陕西陕煤黄陵矿业有限公司 A kind of coal mine supporting construction and its method for protecting support for passing through old kiln goaf

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03262818A (en) * 1990-03-13 1991-11-22 Mitsui Fudousan Kensetsu Kk Electro-osmosis dewatering method
CN102071940A (en) * 2010-12-31 2011-05-25 大同煤矿集团有限责任公司 Construction method for mine shaft through multilayer goaf
CN102155249A (en) * 2011-03-11 2011-08-17 中国矿业大学 Method for supporting tunnel roof below mined-out area
CN102182471A (en) * 2011-03-23 2011-09-14 彬县水帘洞煤炭有限责任公司 Advance support method for coal mine tunnel high-risk area
CN102182174A (en) * 2011-04-02 2011-09-14 河海大学 Construction method for treating soft soil foundation by combining chemical solution injection electro-osmosis method and gravel pile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03262818A (en) * 1990-03-13 1991-11-22 Mitsui Fudousan Kensetsu Kk Electro-osmosis dewatering method
CN102071940A (en) * 2010-12-31 2011-05-25 大同煤矿集团有限责任公司 Construction method for mine shaft through multilayer goaf
CN102155249A (en) * 2011-03-11 2011-08-17 中国矿业大学 Method for supporting tunnel roof below mined-out area
CN102182471A (en) * 2011-03-23 2011-09-14 彬县水帘洞煤炭有限责任公司 Advance support method for coal mine tunnel high-risk area
CN102182174A (en) * 2011-04-02 2011-09-14 河海大学 Construction method for treating soft soil foundation by combining chemical solution injection electro-osmosis method and gravel pile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103485808A (en) * 2013-10-12 2014-01-01 山东科技大学 Electro-osmosis home position modified roadway anchoring method of underground swelling soft rock
CN103485808B (en) * 2013-10-12 2015-07-01 山东科技大学 Electro-osmosis home position modified roadway anchoring method of underground swelling soft rock
CN104314583A (en) * 2014-09-03 2015-01-28 山西煤炭运销集团晋城有限公司 Support method of coal seam roadway empty area
CN105927243A (en) * 2016-06-21 2016-09-07 山东科技大学 Device and method for supporting downhole surrounding rock faults
CN105927243B (en) * 2016-06-21 2018-06-22 山东科技大学 A kind of underground country rock tomography suspension device and method for protecting support
CN109184752A (en) * 2018-09-29 2019-01-11 陕西陕煤黄陵矿业有限公司 A kind of coal mine supporting construction and its method for protecting support for passing through old kiln goaf

Also Published As

Publication number Publication date
CN102505949B (en) 2013-10-30

Similar Documents

Publication Publication Date Title
CN103410515B (en) It is a kind of that three-soft seam is reciprocating combines mining method without coal column
CN103615285B (en) A kind of stope route arrangement and method being beneficial to Tight filling
CN103161480B (en) Initiatively support the method for roadside packing gob side entry retaining
AU2013354613B2 (en) Method of local filling to control surface subsidence in worked-out area
CN103244123B (en) High-dipping medium thick ore body mining method
CN103742148A (en) Gangue-filling coal mining method for sharp inclined coal seam under flexible shield support
CN101749020A (en) Forward coal mining by filling method
CN108222938B (en) Combined grouting filling mining method for large-inclination-angle coal seam goaf
CN104775819A (en) Deep inclined coal seam mining roadway mine pressure control mining method
CN103758567B (en) A kind of breaking roof Collapsed zone grouting filling method
CN104500070B (en) Continuous coal mining machine paste filling mining method
CN107725052B (en) One kind, which is adopted, stays integration exploitation gob side entry top plate constant-resistance anchor body beam method for protecting support
CN104481540A (en) Method for controlling multiple coal mining hazards by high level borehole grouting
CN102505949B (en) Support method for coal seam roadway to cross gob
CN103953345B (en) A kind of small section entry retaining along gob side exploitation method
CN108756882A (en) A kind of district sublevel entry adopts recovery method without the short length of filling of driving formula
CN102720498A (en) Gob-side entry retaining mining process for coal face
CN104061001A (en) Gob-side entry retaining mining support process method
CN105332710A (en) Construction method suitable for up-down overlapped tunnel with small clear space and long distance under weak geological condition
CN107829742A (en) A kind of avalanche fills barnyard avalanche mining methods
CN102287211A (en) Gob roadway end part hydraulic support frame and gob roadway coal mining method thereof
CN104533415A (en) Mining method coupling forced block caving method with spontaneous caving method
CN104453900A (en) Filling mining method of near-horizontal ore body
CN105240012A (en) F-type section coal-mining method allowing commingled mining of coal pillars
CN103410550B (en) A kind of coal mine underground airbridge construction method

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model