CN110318792B - Supporting method for controlling deformation of roadway roof - Google Patents

Supporting method for controlling deformation of roadway roof Download PDF

Info

Publication number
CN110318792B
CN110318792B CN201910624884.0A CN201910624884A CN110318792B CN 110318792 B CN110318792 B CN 110318792B CN 201910624884 A CN201910624884 A CN 201910624884A CN 110318792 B CN110318792 B CN 110318792B
Authority
CN
China
Prior art keywords
roadway
drilling
drill hole
anchor rope
terminal
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.)
Active
Application number
CN201910624884.0A
Other languages
Chinese (zh)
Other versions
CN110318792A (en
Inventor
徐营
孙峰
周谢康
柏建彪
王朝阳
常庆粮
江澎
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.)
China University of Mining and Technology CUMT
Original Assignee
China University of Mining and Technology CUMT
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 China University of Mining and Technology CUMT filed Critical China University of Mining and Technology CUMT
Priority to CN201910624884.0A priority Critical patent/CN110318792B/en
Publication of CN110318792A publication Critical patent/CN110318792A/en
Application granted granted Critical
Publication of CN110318792B publication Critical patent/CN110318792B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

The invention discloses a supporting method for controlling deformation of a roadway roof, which comprises the steps of firstly selecting any one of two sides of a roadway as an initial side on the roadway roof supported by anchor ropes, drilling a drill hole I on upward surrounding rock of the roadway roof 100-300 mm away from the side, drilling a drill hole II on the other side along the horizontal direction at the terminal of the drill hole I, and then drilling a drill hole III on the roadway roof at the terminal of the drill hole II until the terminal of the drill hole III penetrates out of the roadway roof; sequentially penetrating an anchor rope through a drill hole I, a drill hole II and a drill hole III, and fixing the anchor rope and a roadway top plate at the starting end of the drill hole I and the terminal of the drill hole III by using anchor rope rigging to complete a group of anchor rope support; then repeating the steps to complete the anchor rope support of the roadway section; and then carrying out anchor rope support on the section of the next roadway, and finally carrying out anchor rope support on each section of the roadway to complete anchor rope support of the whole roadway. The invention can improve the surrounding rock stress state above the roadway roof, thereby effectively controlling the deformation condition of the roadway roof.

Description

Supporting method for controlling deformation of roadway roof
Technical Field
The invention relates to a supporting method, in particular to a supporting method for controlling deformation of a roadway roof.
Background
With the increasing reduction of shallow resource reserves, many mines at home and abroad enter deep mining, the deepest mining depth of south Africa gold mine and Indian gold mine exceeds 4000m, the deepest mining depth of Russian metal mine exceeds 2000m, the coal mining depth of China is increased at the speed of 8-12 m per year, and the coal mining depth of partial mining areas such as Xuzhou, flat-topped mountain, Kai 28390, New Wen and the like is over 1000 m.
After the coal mine enters deep mining, the engineering rock mechanics problem completely different from that of shallow mining is faced by the influence of a complex stress field of a deep stratum. The engineering rock body is changed from the linear rock mechanical behavior of a shallow part to the deep nonlinear rock mechanical behavior, so that the engineering disasters generated by a deep mine are increased day by day. Under high stress at the deep part, the rock is converted from brittleness under low confining pressure to ductility under high confining pressure, so that the tunnel surrounding rock has large deformation and high deformation speed; after entering the deep part, even if the tunnel surrounding rock with medium strength is used, the stress state of the tunnel surrounding rock reaches or approaches the long-term strength of the rock, the rock body shows continuous strong rheological property, and finally, the accident of tunnel deformation and tunnel collapse occurs along with the accelerated creep of the rock.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a supporting method for controlling the deformation of a roadway roof, which can improve the stress state of surrounding rocks above the roadway roof, thereby effectively controlling the deformation condition of the roadway roof.
In order to achieve the purpose, the invention adopts the technical scheme that: a supporting method for controlling deformation of a roadway roof comprises the following specific steps:
A. selecting any one of two sides of a roadway as an initial side on a roadway top plate supported by an anchor rope, and drilling a borehole I on upward surrounding rock of the roadway top plate 100-300 mm away from the side, wherein the included angle between the drilling direction of the borehole I and the vertical direction of the roadway top plate is 5-15 degrees, and the length of the borehole I is 2-6 m;
B. drilling a drill hole II along the horizontal direction at the terminal of the drill hole I to the other side, wherein the length of the drill hole II is 600-1500 mm, then drilling a drill hole III at the terminal of the drill hole II to the roadway top plate until the terminal of the drill hole III penetrates out of the roadway top plate, and the included angle between the drilling direction of the drill hole III and the vertical direction of the roadway top plate is 5-15 degrees;
C. sequentially penetrating an anchor rope through a drill hole I, a drill hole II and a drill hole III, and fixing the anchor rope and a roadway top plate at the starting end of the drill hole I and the terminal of the drill hole III by using anchor rope rigging to complete a group of anchor rope support;
D. repeating the steps A to C to the position 600-1500 mm away from the terminal of the drill hole III on the other side of the roadway, and completing a group of anchor rope support again; the anchor ropes of two adjacent groups of supports are connected through the anchor ropes which are horizontally arranged, and the process is repeated until the last group of anchor rope supports reach the other side of the roadway, and the anchor rope supports of the cross section of the roadway are completed;
E. d, when the last group of anchor rope supports in the step D reach the other side of the roadway, two conditions exist;
one of the groups reaches the other side of the roadway after the drilling hole I is drilled, a drilling hole II is drilled at the terminal of the drilling hole I along the direction of the roadway at the moment, the length of the drilling hole II is 600-1500 mm, then a drilling hole III is drilled at the terminal of the drilling hole II to the roadway top plate until the terminal of the drilling hole III penetrates out of the roadway top plate, and an included angle between the drilling direction of the drilling hole III and the vertical direction of the roadway top plate is 5-15 degrees; after the completion, the group of drill holes III are positioned on the next roadway section, and then the steps A to D are repeated on the roadway section to complete the anchor rope support of the roadway section;
the other is that the group reaches the other side of the roadway after the drill hole III is drilled, the position 600-1500 mm away from the terminal of the drill hole III along the trend of the roadway is the starting end of the drill hole of the next group of anchor rope supports, the position is positioned at the section of the next roadway, and then the steps A to D are repeated on the section of the roadway to complete the anchor rope support of the section of the roadway;
F. and E, repeating the step E on each section of the roadway until the anchor rope support of the whole roadway is completed.
Compared with the prior art, the invention adopts a mode of combining and fixing a plurality of groups of drilling holes and anchor ropes, and has the following advantages:
(1) the anchor rope has strong tensile capacity and can effectively control the separation of the roadway top plate; the anchor rope provides a certain restraining force for the surface of the roadway top plate, the stress state of the roadway surrounding rock is improved, and the post-peak strength of the rock is improved; the anchor rope can anchor a deep stable rock stratum above the top plate through the drill hole I, the drill hole II and the drill hole III and has a suspension effect on a shallow loose rock stratum; the anchor rope support is formed into an integral support by continuously connecting a plurality of anchor ropes, and loose rock stratums in the area form a combination in the mode, so that the self-bearing capacity of the surrounding rock is fully exerted. Through the above effects, the deformation of the top plate of the deep tunnel can be effectively controlled;
(2) compared with an anchor rod and an anchor cable, the anchor cable has lower cost;
(3) the invention has simple construction and convenient operation, can support the tunnel roof with larger area only by the anchor rope, and can reduce the working strength of workers because the weight of the anchor rope is light.
Drawings
FIG. 1 is a schematic structural view after the practice of the present invention;
fig. 2 is a top view of fig. 1.
In the figure: 1. roadway, 2, anchor rope rigging, 3, anchor rope, 4, drilling I, 5, drilling II, 6, drilling III.
Detailed Description
The present invention will be further explained below.
As shown in the figure, the method comprises the following specific steps:
A. selecting any one of two sides of a roadway 1 as an initial side on a top plate of the roadway 1 supported by anchor ropes, and drilling a borehole I4 in upward surrounding rock of the roadway top plate 100-300 mm away from the side, wherein the included angle between the drilling direction of the borehole I4 and the vertical direction of the roadway top plate is 5-15 degrees, and the length of the borehole I4 is 2-6 m;
B. drilling a drill hole II 5 at the terminal of the drill hole I4 to the other side along the horizontal direction, wherein the length of the drill hole II 5 is 600-1500 mm, then drilling a drill hole III 6 at the terminal of the drill hole II 5 to the roadway roof until the terminal of the drill hole III 6 penetrates out of the roadway roof, and the included angle between the drilling direction of the drill hole III 6 and the vertical direction of the roadway roof is 5-15 degrees;
C. sequentially penetrating an anchor rope 3 through a drill hole I4, a drill hole II 5 and a drill hole III 6, and fixing the anchor rope with a roadway top plate by adopting an anchor rope rigging 2 at the starting end of the drill hole I4 and the terminal end of the drill hole III 6 to complete a group of anchor rope support;
D. repeating the steps A to C to the position 600-1500 mm away from the terminal of the drill hole III 6 on the other side of the roadway 1, and completing a group of anchor rope support again; the anchor ropes 3 of two adjacent groups of supports are connected through the anchor ropes 3 which are horizontally arranged, and the process is repeated until the last group of anchor rope supports reach the other side of the roadway 1, and the anchor rope supports of the section of the roadway 1 are completed; the anchor rope 3 is a high-quality rope with high tensile strength, high shearing resistance and high elongation;
E. d, when the last group of anchor rope supports in the step D reach the other side of the roadway 1, two conditions exist;
one of the groups reaches the other side of the roadway after a drill hole I4 is drilled, a drill hole II 5 is drilled at the terminal of the drill hole I4 along the direction of the roadway 1, the length of the drill hole II 5 is 600-1500 mm, then a drill hole III 6 is drilled at the terminal of the drill hole II 5 to the roadway top plate until the terminal of the drill hole III 6 penetrates out of the roadway top plate, and an included angle between the drilling direction of the drill hole III 6 and the vertical direction of the roadway top plate is 5-15 degrees; after the completion, the group of drill holes III 6 are positioned on the section of the next roadway 1, and then the steps A to D are repeated on the section of the roadway 1 to complete the anchor rope support of the section of the roadway 1;
the other is that the group reaches the other side of the roadway 1 after the drill hole III 6 is drilled, the position 600-1500 mm away from the terminal of the drill hole III 6 along the trend of the roadway 1 is the drilling starting end of the next group of anchor rope supports, the position is positioned at the section of the next roadway, and then the steps A-D are repeated on the section of the roadway to complete the anchor rope support of the section of the roadway;
F. and E, repeating the step E on each section of the roadway 1 until the anchor rope support of the whole roadway 1 is completed.

Claims (1)

1. A supporting method for controlling deformation of a roadway roof is characterized by comprising the following specific steps:
A. selecting any one of two sides of a roadway as an initial side on a roadway top plate supported by anchor ropes, and drilling a borehole I on upward surrounding rock of the roadway top plate 100-300 mm away from the side, wherein an included angle between the drilling direction of the borehole I and the vertical direction of the roadway top plate is 5o～15oThe length of the drill hole I is 2-6 m;
B. drilling a hole II along the horizontal direction at the terminal of the drilling I to another side, wherein the length of the drilling II is 600-1500 mm, then drilling a hole III at the terminal of the drilling II to the roadway roof until the terminal of the drilling III penetrates out of the roadway roof, and an included angle between the drilling direction of the drilling III and the vertical direction of the roadway roof is 5o～15o；
C. Sequentially penetrating an anchor rope through a drill hole I, a drill hole II and a drill hole III, and fixing the anchor rope and a roadway top plate at the starting end of the drill hole I and the terminal of the drill hole III by using anchor rope rigging to complete a group of anchor rope support;
D. repeating the steps A to C to the position 600-1500 mm away from the terminal of the drill hole III on the other side of the roadway, and completing a group of anchor rope support again; the anchor ropes of two adjacent groups of supports are connected through the anchor ropes which are horizontally arranged, and the process is repeated until the last group of anchor rope supports reach the other side of the roadway, and the anchor rope support of the section of the roadway is completed;
E. d, when the last group of anchor rope supports in the step D reach the other side of the roadway, two conditions exist;
one of them reaches another group in tunnel for this group after establishing drilling I, at this moment in drilling I terminal along the tunnel trend beat establish drilling II, the length of drilling II is 600 ~ 1500mm, then in drilling II terminal to the tunnel roof beat establish drilling III, wear out the tunnel roof until drilling III terminal, drilling III's drilling direction and the vertical direction contained angle of tunnel roof are 5o～15o(ii) a After the completion, the group of drill holes III are positioned on the next roadway section, and then the steps A to D are repeated on the roadway section to complete the anchor rope support of the roadway section;
the other is that the group reaches the other side of the roadway after the drill hole III is drilled, the position 600-1500 mm away from the terminal of the drill hole III along the trend of the roadway is the starting end of the drill hole of the next group of anchor rope supports, the position is positioned at the section of the next roadway, and then the steps A to D are repeated on the section of the roadway to complete the anchor rope support of the section of the roadway;
F. and E, repeating the step E on each section of the roadway until the anchor rope support of the whole roadway is completed.
CN201910624884.0A 2019-07-11 2019-07-11 Supporting method for controlling deformation of roadway roof Active CN110318792B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910624884.0A CN110318792B (en) 2019-07-11 2019-07-11 Supporting method for controlling deformation of roadway roof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910624884.0A CN110318792B (en) 2019-07-11 2019-07-11 Supporting method for controlling deformation of roadway roof

Publications (2)

Publication Number Publication Date
CN110318792A CN110318792A (en) 2019-10-11
CN110318792B true CN110318792B (en) 2020-08-21

Family

ID=68121953

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910624884.0A Active CN110318792B (en) 2019-07-11 2019-07-11 Supporting method for controlling deformation of roadway roof

Country Status (1)

Country Link
CN (1) CN110318792B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113036A (en) * 1976-04-09 1978-09-12 Stout Daniel W Laser drilling method and system of fossil fuel recovery
CN2911184Y (en) * 2006-04-15 2007-06-13 中国矿业大学 Shed type supporting stable conjunction mechanism
CN101333813B (en) * 2007-06-27 2011-09-28 柳州欧维姆机械股份有限公司 U-shaped anchorage cable
CN101603431B (en) * 2009-07-14 2011-05-11 中国矿业大学 Method for reinforcing outburst-prone coal seam cross-cut coal uncovering

Also Published As

Publication number Publication date
CN110318792A (en) 2019-10-11

Similar Documents

Publication Publication Date Title
CN106150503B (en) A kind of method that tight roof is administered in hydraulic fracturing
CN101705821B (en) Method for controlling roof caving under condition of hardroof in coal mining
CN205189893U (en) Be used for a lane coal column to wearing reinforced (rfd) supporting construction
EP2801697A1 (en) Longwall working face, non-pillared mining method
CN102966354A (en) Non-pillar mining method for hard roof coal wall of thick coal seam
CN108868833A (en) A method of it carries out cutting gob side entry retaining in the relieving roadway of top in U-shaped steel supported laneway
CN113417638A (en) Advanced roof cutting pressure relief and surrounding rock control method for hard roof of gob-side roadway
CN102778182A (en) Beside-roadway escribing pressure relief method of roadway driving along gob of small coal pillar influenced by dynamic pressure
CN109751067B (en) Method for improving pre-pulling force of anchor rod
CN107725052A (en) One kind, which is adopted, stays integration exploitation gob side entry top plate constant-resistance anchor body beam method for protecting support
CN106247876A (en) High working face cuts greatly a blasting method for fully-mechanized mining working tight roof overhead caving
CN111271061A (en) Fully mechanized mining end mining rack removing method
CN110318792B (en) Supporting method for controlling deformation of roadway roof
CN109958454A (en) Stope drift active workings pucking control system and its control method
CN104265294B (en) Coal pillar-free mining method for blasting mining face of steeply dipping seam
CN106761742B (en) A kind of deep island working face gob side entry driving surrounding rock stability control method
CN104790991A (en) Mining roadway surrounding rock strong and long top anchoring technology
CN102155248A (en) Method for supporting laneway below coal pillar
CN108316925B (en) Simple gob-side entry retaining method for drilling and roof breaking of working face with three-soft coal layer thickness direct roof
Qin et al. Stability and control of retracement channels in thin seam working faces with soft roof
CN108952715B (en) Gob-side entry driving top coal supporting and reinforcing method for inclined thick/extra-thick coal seam entry top
CN105626109B (en) It is a kind of that there is the method for repeating to apply prestressed cable bolting
CN105201510A (en) Preventing and controlling method for creep-induced rock burst
CN113653506B (en) Control method for high-stress soft rock tunnel bottom plate
CN205477694U (en) Adjustable flexible support

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant