CN103821538B - J-type horizontal assistant branched hole surface advance grouting paste-making method - Google Patents
J-type horizontal assistant branched hole surface advance grouting paste-making method Download PDFInfo
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Abstract
The invention discloses a kind of J-type horizontal assistant branched hole surface advance grouting paste-making method, step 1: first, according to weak coal-face overlying wind oxidation basement rock band position and size need to be reinforced, determine J-type main injected hole position, quantity and adjacent J-type main injected hole spacing thereof；Step 2: secondly, drills the main injected hole of J-type, and the main injected hole of this J-type includes straight hole section, inclination section and horizontal segment；Step 3: according to horizontal grouting segment length, is arranged around 2～4 assistant branched holes at the main injected hole of each J-type；Step 4: assistant branched hole horizontal to J-type uses protrusive grouting mode to carry out slip casting.The J-type horizontal assistant branched hole surface advance grouting paste-making method of the present invention, has and can be effectively improved the pre-pouring grout consolidation effect on coal-face overlying wind oxidation basement rock band stratum, prevent the accident such as coal-face pressure rack from occurring, improve the advantage such as security reliability of coal work.
Description
Technical field
The invention belongs to mine construction field, relate to a kind of J-type horizontal assistant branched hole pre grouting from the surface side
Method.
Background technology
Slurry injection technique, generally with grouting pump as power source, utilizes the pressure that grouting pump provides, by prepare, tool
There are the slurries filling bonding capacity, are injected into aqueous or weak loose rock (native) by grout pipe line and injected hole
In Ceng, make slurries be diffused in the crack on above-mentioned stratum, hole or cavity with the form such as filling or infiltration, wait to starch
Liquid blocks crack, isolation water route, consolidation loose rock (native) body, filling cavity after condensing, thus plays water blockoff
Or reinforcement effect.Slurry injection technique in construction of coal mine by slip casting purpose classify, can be divided into vertical pre grouting from the surface,
Vertical shaft working surface pre-pouring grout and inclined shaft (lane), roadhead pre-pouring grout.
Under the conditions of wind oxidized zone thin bedrock is without key stratum, during this type of coal-face back production, along with working face
Continuing back production, after top board 3-4 the minor cycle of experience, rock movement has influence on top high position rock movement, can go out
The most disrumpent feelings, move integrally (large period), circulation law so and general overlying strata condition
Working face movement rule is different.When the minor cycle presses, working surface hydraulic support is the most permissible
Bear, but when generation large period is pressed, the most disrumpent feelings rock stratum globality moves produced load will be by cash
Stone and hydraulic support shared, when the excessive bearing capacity beyond hydraulic support of overlying rock load, seriously
Meeting cause pressure rack accident.
In order to when alleviating working face extraction to greatest extent overlying rock large period to press ore deposit pressure manifest severe degree,
Avoid pressure rack accident, can use grouting method that working face overlying wind oxidation basement rock band is carried out slip casting and add
Gu, in face roof rock stratum, i.e. manually construct one layer of main key stratum, to prevent coal-face pressure rack accident
Occur.Conventional grouting method is to use tunnel pre grouting from the working face, when driving is to water-bearing layer or fault belt
(reserved certain thickness), stops driving, by the reserved rock plug of design requirement or construction wall for grouting, then
From working face bored grouting, after carrying out water blockoff or reinforcing, sinking and drifting can be recovered again.But tunnel grouting is executed
Work slip casting section is less, takies tunnel duration, limited space.And working face overlying wind oxidation basement rock band scope is relatively big,
The inapplicable this geological state of tunnel pre grouting from the working face.
Vertical pre grouting from the surface is generally before Shaft Excavation, from ground drilling hole to aqueous and broken rock in advance
Carrying out slip casting, pre grouting from the surface can be carried out at construction preparatory stage, and operating condition is good, safety.
Basement rock band is aoxidized for the overlying wind above coal-face with larger area, and in order to take full advantage of
The advantage of pre grouting from the surface, just reinforces wind oxidized zone thin bedrock on ground, and the present invention proposes a kind of J
The injected hole arrangement of type horizontal assistant branched hole, in conjunction with directional drilling technique and horizontal pre-pouring grout technology, enters
The pre grouting from the surface construction of row coal-face top board wind oxidation basement rock band.Appearance due to helicoid hydraulic motor, it is ensured that
J-type horizontal assistant branched hole hole quality, is effectively improved coal-face overlying wind oxidation basement rock band stratum
Pre-pouring grout consolidation effect.After boring arrives predetermined hole depth, holing in the horizontal direction, it vertically cuts open
Face is J-type, and level is distributed in assistant shape to boring.This is a kind of relatively new pre grouting from the surface hole layout side
Formula, the advantage combining pre grouting from the surface, it is effectively improved coal-face overlying wind oxidation basement rock band stratum
Pre-pouring grout consolidation effect.
The present invention uses J-type horizontal assistant branched hole pattern, and coal-face overlying wind is aoxidized basement rock band
Stratum carries out pre grouting from the surface, and straight hole section boring amount can be greatly decreased, and grouting pressure is high, slurries diffusion away from
Away from from, it is effectively improved coal-face overlying wind oxidation basement rock band stratum pre-pouring grout consolidation effect.
It addition, along with the continuous increase of mine Exploitation Depth, complex geologic conditions, the weakness such as tomography, crushed zone
Bad ground connects the security threat of chamber group and main haulage roadway surrounding rock stability and support system all the more to deep-well
Seriously, in order to improve mechanical character of surrounding rock, use J-type horizontal assistant branched hole surface advance grouting paste-making method to shaft bottom
Parking lot large section roadway, such as ingate and relevant chamber group, central pump house, central substation and crosspoint
At V-belt, weak broken wall rock carries out pre grouting from the surface reinforcing, it can be ensured that deep-well connects chamber group and main haulage roadway
Construction safety.
Summary of the invention
The present invention is for avoiding weak point present in above-mentioned prior art, it is provided that a kind of horizontal assistant of J-type
Branched hole surface advance grouting paste-making method, with improve coal-face overlying wind oxidation basement rock band pre-pouring grout consolidation effect,
Improve the security reliability of coal work.
Before the present invention implements, being first sampled coal-face overlying wind oxidation basement rock band stratum, test is each
The physical and mechanical parameter of layer rock sample, specifically includes that porosity, moisture content, density, resistance to compression and tensile strength etc.,
To determine grouting parameter and injecting paste material.After the present invention implements, at coal-face air return way 8, adhesive tape
Machine crossheading 10 and cut at eye, upwards core-drilling, rock physics mechanical property after test slip casting, evaluate and mine
Working face 9 overlying wind oxidation basement rock band stratum slip casting effect and stability thereof.
J-type of the present invention horizontal assistant branched hole surface advance grouting paste-making method, comprises the following steps:
Step 1: first, foundation need to reinforce weak coal-face overlying wind oxidation basement rock band position and area is big
Little, determine the position of the main injected hole of J-type, quantity and the pitch of holes of adjacent main slip casting thereof；The main slip casting of described J-type
Hole position of opening and distance L of flat spot of hole take 200～300m, and quantity 2～3, spacing a are generally
20～30m；
Step 2: secondly, drills the main injected hole of J-type at earth's surface, the main injected hole of this J-type include straight hole section,
Inclination section and horizontal segment；
Step 3: according to horizontal grouting segment length, 2～4 plumages are set in the both sides of the main injected hole of each J-type
Wing branched hole；
Step 4: assistant branched hole horizontal to J-type uses protrusive grouting mode to carry out slip casting.
The feature of J-type of the present invention horizontal assistant branched hole surface advance grouting paste-making method lies also in:
In described step 1, distance L of described J-type main injected hole position of opening and flat spot of having holed is
200～300m, quantity 2～3, spacing a are generally 20～30m.
In described step 1, spacing c of the assistant branched hole that each two is adjacent is about 40m.
In described step 4, the straight hole section (3) of the main injected hole of J-type and inclination section (4) setting of casing knot of cementing the well
Shu Hou, construction 30m horizontal drilling is as open-hole slip casting horizontal segment (5), and at the deflecting of the main injected hole of J-type
Stop grouting plug is installed in section (4) bottom, carries out pre grouting from the surface, after reaching grouting design requirement, takes out inclination section
(4) bottom stop grouting plug, carries out cleaning bottom of hole to aforementioned 30m open-hole slip casting section horizontal drilling, and construct 30m further along
Horizontal drilling is as open-hole slip casting section, and installs stop grouting plug bottom aforementioned inclination section, carries out pre grouting from the surface,
So the most repeatedly, until whole needing slip casting region to reach predetermined requirement.
Compared with the prior art, the present invention has the beneficial effect that:
The J-type horizontal assistant branched hole surface advance grouting paste-making method of the present invention, utilizes directional drilling technique, in combination
The advantage of face pre-pouring grout carries out pre-pouring grout to horizontal direction weathered rocks band, solves tunnel pre grouting from the working face note
Slurry section is less, takies the tunnel duration, the problem of limited space.
The present invention can be additionally used in shaft station large section roadway, such as ingate and relevant chamber group, central authorities' water pump
At room, central substation and V-belt, crosspoint, weak broken wall rock pre grouting from the surface is reinforced.
The J-type horizontal assistant branched hole surface advance grouting paste-making method of the present invention, has and can be effectively improved coal work
The pre-pouring grout consolidation effect on face overlying wind oxidation basement rock band stratum, prevent the accidents such as coal-face pressure rack from occurring,
The advantages such as the security reliability of raising coal work.
Accompanying drawing explanation
Fig. 1 is the vertical cross section schematic diagram of the main injected hole of J-type horizontal assistant branched hole；
Fig. 2 is the horizontal layout schematic diagram of the main injected hole of J-type horizontal assistant branched hole；
Fig. 3 is detailed description of the invention vertical cross section schematic diagram；
Fig. 4 is detailed description of the invention horizontal layout schematic diagram；
In figure, label is described as follows:
1 first main injected hole, 2 second main injected holes, 3 straight hole sections, 4 inclination sections, 5 horizontal segments, 6 earth's surfaces,
7 weathered rocks sections, 8 air return way, 9 working faces, 10 sealing-tape machine crossheadings.
Figure marks implication as follows:
The spacing of a adjacent main injected hole, b wind oxidation basement rock bandwidth, c assistant branched hole spacing, d
The axial length of branched hole, the h injected hole straight hole degree of depth, s wind oxidized zone basement rock length, the main slip casting of L
Hole (1,2) position of opening and the distance of flat spot of having holed
Detailed description of the invention
For a certain exploiting field, certain ore deposit, use J-type horizontal assistant branched hole surface advance grouting paste-making method, see accompanying drawing 1～
Fig. 2, it comprises the following steps:
1, first, according to reinforcing weak coal-face overlying wind oxidation basement rock band position and area b ' s,
Determine J-type main injected hole position, quantity and adjacent main injected hole spacing；Described J-type main injected hole position of opening
Being 240m with distance L of flat spot of having holed, quantity 2, spacing a are 30m
2, drilling the main injected hole of J-type at earth's surface 6, the main injected hole of this J-type includes straight hole section 200m, deflecting
Section 240m and horizontal segment 200m；As it is shown on figure 3, the main injected hole of J-type includes the first main injected hole 1 and
Two main injected holes 2, utilize Technology of Directional Drilling to construct, and lateral aperture is positioned at needs slip casting region；
Step 3: according to horizontal grouting segment length, 3 assistants that are arranged around at the main injected hole of each J-type divide
Zhi Kong；As it is shown on figure 3, the interval c between the adjacent assistant branched hole of each two is 40m；
Step 4: assistant branched hole horizontal to J-type uses protrusive grouting mode to carry out slip casting.Injecting paste material and
Parameter determines according to physical-mechanical properties of rock.Here single liquid cement mortar, ratio of mud 1:1 are used.The main note of J-type
After the straight hole section 3 in slurry hole and inclination section 4 setting of casing well cementation terminate, construction 30m horizontal drilling is as open-hole
Slip casting horizontal segment 5, and stop grouting plug is installed bottom the inclination section 4 of the main injected hole of J-type, carry out pre grouting from the surface,
After reaching grouting design requirement, take out stop grouting plug bottom inclination section 4, to aforementioned 30m open-hole slip casting section level
Boring carries out cleaning bottom of hole, and construction 30m horizontal drilling is as open-hole slip casting section further along, and at the bottom of aforementioned inclination section
Stop grouting plug is installed in portion, carries out pre grouting from the surface, the most repeatedly, needs slip casting region to reach predetermined wanting until whole
Ask.
Embodiment described above is only to be described the preferred embodiment of the present invention, not to the present invention
Scope be defined, on the premise of designing spirit without departing from the present invention, those of ordinary skill in the art to this
The various deformation made of technical scheme of invention and improvement, all should fall into the protection that claims of the present invention determines
In the range of.
Claims (5)
1.J type horizontal assistant branched hole surface advance grouting paste-making method, is characterized in that, comprise the following steps:
Step 1: first, foundation need to reinforce weak coal-face overlying wind oxidation basement rock band position and area is big
Little, determine J-type main injected hole (1,2) position, quantity and adjacent J-type main injected hole spacing thereof；
Step 2: secondly, at earth's surface (6) the place probing main injected hole of J-type (1,2), the main injected hole of this J-type
(1,2) includes straight hole section (3), inclination section (4) and horizontal segment (5)；The main injected hole of described J-type includes
First main injected hole (1) and the second main injected hole (2), utilize Technology of Directional Drilling to construct, described J
The described horizontal segment of the main injected hole of type is positioned at and needs slip casting region；
Step 3: according to horizontal grouting segment length, is arranged around 2～4 plumages at the main injected hole of each J-type
Wing branched hole；
Step 4: assistant branched hole horizontal to J-type uses protrusive grouting mode to carry out slip casting；Injecting paste material and
Parameter determines according to physical-mechanical properties of rock；The physical and mechanical parameter of each layer rock sample, specifically include that porosity,
Moisture content, density, resistance to compression and tensile strength；Using single liquid cement mortar at bedrock weathering zone, the ratio of mud exists
1:0.8～1:1.2.
J-type the most according to claim 1 horizontal assistant branched hole surface advance grouting paste-making method, is characterized in that,
In described step 1, distance L of described J-type main injected hole (1,2) position of opening and flat spot of having holed is
200～300m, quantity 2～3, spacing a are 20～30m.
J-type the most according to claim 1 horizontal assistant branched hole surface advance grouting paste-making method, is characterized in that,
In described step 3, the interval c between the assistant branched hole that each two is adjacent is about 40m.
J-type the most according to claim 1 horizontal assistant branched hole surface advance grouting paste-making method, is characterized in that,
In described step 4, after the straight hole section (3) of the main injected hole of J-type and inclination section (4) setting of casing well cementation terminate,
Construction 30m horizontal drilling is as open-hole slip casting horizontal segment (5), and at the inclination section (4) of the main injected hole of J-type
Stop grouting plug is installed in bottom, carries out pre grouting from the surface, after reaching grouting design requirement, takes out inclination section (4) end
Portion's stop grouting plug, carries out cleaning bottom of hole to aforementioned 30m open-hole slip casting section horizontal drilling, and construction 30m level is bored further along
Hole is as open-hole slip casting section, and installs stop grouting plug bottom aforementioned inclination section, carries out pre grouting from the surface, the most instead
Multiple, need slip casting region to reach predetermined requirement until whole.
J-type the most according to claim 1 horizontal assistant branched hole surface advance grouting paste-making method, is characterized in that,
Before described J-type horizontal assistant branched hole surface advance grouting paste-making method is implemented, first to needing slip casting stratum to take
Sample, tests the physical and mechanical parameter of each layer rock sample, specifically include that porosity, moisture content, density, resistance to compression and
Tensile strength, in order to determine grouting parameter and injecting paste material；Described J-type horizontal assistant branched hole surface advance grouting
After paste-making method is implemented, rock physics mechanical property after the upwards core-drilling of slip casting stratum, test slip casting, evaluate
Stratum slip casting effect and stability thereof.
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| CN104179511A (en) * | 2014-08-13 | 2014-12-03 | 淮南矿业(集团)有限责任公司 | Novel hole arrangement grouting method for enabling ground pre-grouting reinforcing roadway to penetrate through surrounding rocks at fault fracture zone |
| CN105888549B (en) * | 2015-06-26 | 2018-01-19 | 山东科技大学 | A kind of boring BHA of km depth L-type pre grouting from the surface and bore process |
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| CN106869934B (en) * | 2017-04-06 | 2018-08-31 | 安徽理工大学 | A kind of slip casting recovery method suitable for inclined seam |
| CN108798717A (en) * | 2018-07-09 | 2018-11-13 | 山东省煤田地质局第四勘探队 | A kind of borehole design method that tunnel vault wall rock grouting under urban road is reinforced |
| CN109899089A (en) * | 2019-03-07 | 2019-06-18 | 中煤科工集团西安研究院有限公司 | Goaf grouting method based on pinniform horizontal branch directional drilling technique |
| CN110645002A (en) * | 2019-09-29 | 2020-01-03 | 淮北工业建筑设计院有限责任公司 | Support method for coal mine tunnel |
| CN110671148B (en) * | 2019-11-12 | 2020-10-27 | 中煤能源研究院有限责任公司 | One-hole multi-open ground grouting filling method above coal pillar |
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Inventor after: Tang Yongzhi Inventor after: Li Shihui Inventor after: Cai Haibing Inventor after: Song Haiqing Inventor after: Wang Xiaojian Inventor after: Zheng Tenglong Inventor after: Cheng Hua Inventor after: Cao Haishan Inventor after: Rong Chuanxin Inventor after: Zhang Dunxi Inventor after: Li Mingjing Inventor after: Qian Tongao Inventor after: Yao Zhishu Inventor after: Tang Bin Inventor before: Rong Chuanxin Inventor before: Cheng Hua Inventor before: Tang Yongzhi Inventor before: Yao Zhishu Inventor before: Cai Haibing Inventor before: Song Haiqing Inventor before: Wang Xiaojian Inventor before: Zheng Tenglong |
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Effective date of registration: 20180227 Address after: 232001 Anhui Province, Huainan city tianjia'an district Mountain Road No. 1 Co-patentee after: Anhui University Of Science And Technology Patentee after: Huainan Mining (Group) Co., Ltd. Address before: 232001 Anhui Province, Huainan city Shungeng Road No. 168 Patentee before: Anhui University Of Science And Technology |