WO2018095012A1 - 一种可扩展的扩孔自锚式锚杆及支护方法 - Google Patents
一种可扩展的扩孔自锚式锚杆及支护方法 Download PDFInfo
- Publication number
- WO2018095012A1 WO2018095012A1 PCT/CN2017/087492 CN2017087492W WO2018095012A1 WO 2018095012 A1 WO2018095012 A1 WO 2018095012A1 CN 2017087492 W CN2017087492 W CN 2017087492W WO 2018095012 A1 WO2018095012 A1 WO 2018095012A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drilling
- section
- anchor
- rod body
- connecting portion
- Prior art date
Links
- 238000004873 anchoring Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008093 supporting effect Effects 0.000 title abstract description 10
- 238000005553 drilling Methods 0.000 claims abstract description 100
- 230000008569 process Effects 0.000 claims abstract description 12
- 230000005641 tunneling Effects 0.000 claims abstract description 4
- 239000003245 coal Substances 0.000 claims description 45
- 238000009434 installation Methods 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000005065 mining Methods 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 239000011440 grout Substances 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 3
- 238000004901 spalling Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007600 charging Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Definitions
- Patent (CN1054433150A) proposes a self-drilling anchor for rapid installation of grouting support. Due to the narrow chip removal passage, it is impossible to discharge a large amount of debris generated by the high-speed rotary drilling bit in time, and the structure is complicated and the manufacturing cost is high.
- Gao patent (CN1548659A) proposes a self-drilling bolt to support soft soil layer.
- the large spiral structure on the anchor body is coupled with the coal body by the self-stabilization process of the rock mass, which produces the working anchoring force based on the embedded force and the friction force, and is fully fastened again.
- the nut of the device allows the tray to be squeezed against the coal wall, so that the large spiral structure of the rod body interacts with the slab-like crack of the coal wall to inhibit the expansion of the crack.
- the reaming self-anchoring is realized by the large spiral structure of the rod body.
- the self-stabilization process of the rock mass is embedded in the coal body, and the working anchoring force is formed by the intercalation force generated by the coupling of the spiral rod body and the coal body, which replaces the resin anchoring agent, and the adaptability for controlling the deformation of the coal lane gang is obviously improved.
- the side of the drilling section rod body 3 is provided with a plurality of grouting holes 7 communicating with the internal through holes, and the inside of the connecting sleeve 5 a connecting sleeve through hole 17, as shown in Figure 4, the inner side of the connecting sleeve 5 is provided with a six-sided connecting portion 16 matching the hexagonal connecting portion 4 of the drilling section rod 3;
- the large spiral structure 2 on the anchor body is coupled with the coal body by the self-stabilization process of the rock mass, and the working anchoring force mainly based on the embedded force and the friction force is generated.
- the nut 10 of the solid device allows the tray 9 to be squeezed against the coal wall, so that the large spiral structure of the rod body interacts radially with the plate-like crack of the coal wall to inhibit the expansion of the crack.
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)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Description
图1为本发明的锚杆结构示意图
Claims (6)
- 一种可扩展的扩孔自锚式锚杆,其特征在于:它包括简易钻头(1)、锚杆体,和预紧装置;其中锚杆体包括多根钻进段杆体(3),多个连接套(5)和设加长段杆体(6),多根钻进段杆体(3)通过多个连接套(5)相互连接,并在尾部通过连接套(5)连接加长段杆体(6),所述钻进段杆体(3)内部设有轴向通孔,外侧设有大螺旋结构(2),钻进段杆体(3)头部外侧设有顶端螺纹(11),尾部设有六棱连接部(4),钻进段杆体(3)侧面设有多个与内部通孔连通的注浆孔(7),所述连接套(5)内部设有连接套通孔(17),连接套(5)一端内侧设有与钻进段杆体(3)六棱连接部(4)相匹配的六面连接部(16),另一端内侧设有与加长段杆体(6)的顶端螺纹(12)相匹配的螺纹连接部(18);所述预紧装置为顺序设置在加长段杆体的锚固螺纹(12)上的止浆塞(8)、托盘(9)和螺母(10)。
- 根据权利要求1所述的可扩展的扩孔自锚式锚杆,其特征在于:所述的简易钻头(1)为钢材加工的一次性钻头,钢材的强度超过钻进岩体强度的1.2倍,其外径小于螺旋杆体外径2mm-10mm。
- 根据权利要求1所述的可扩展的扩孔自锚式锚杆,其特征在于:所述连接套(5)外径小于螺旋结构外径,包括六面连接部(16)、连接套通孔(17)、螺纹连接部(18)。
- 根据权利要求1所述的可扩展的扩孔自锚式锚杆,其特征在于:所述多根加长段(3)的长度在800mm-1500mm之间,所述的加长段杆体在600mm-1200mm之间。
- 一种使用权利要求1所述可扩展的扩孔自锚式锚杆的可扩展的扩孔自锚式锚杆支护方法,其特征在于步骤如下:a.巷道掘进支护时,在需要加长支护的区域设计支护位置,先将简易钻头(1)装配在第一根钻进段杆体(3)上,第一根钻进段杆体(3)的尾部六棱连接部(4)直接与机载或者单体锚杆钻机的六方连接套连接,启动锚杆钻机后,利用简易钻头(1)在锚杆钻机的驱使下一次扩孔破煤钻进,由于简易钻头(1)的外径小于大螺旋杆体的外径,大螺旋结构(2)在钻进过程中二次扩孔自锚;b.当第一段钻进段(3)钻入煤壁只尾部剩余200mm露在煤壁时停止,根据地质条件设计锚固长度,需要利用多根钻进段(3)时,将锚杆钻机从第一段钻进段(3)尾部拆下,利用连接套(5)的六面连接部(16)与第一段钻进段杆体(3)六棱连接部(4)匹配,把第二个钻进段(3)通过顶端螺纹(11)与连接套(5)的螺纹连接部(18)连接后,将锚杆钻机安装在第二个钻进段(3)尾部,启动锚杆钻机,使第二段钻进段杆体钻入煤壁,其余钻进段(3)依次类推设置;c,完成钻进段安装后,用连接套(5)的六面连接部(16)与钻进段(3)尾部的六棱连接部(4)匹配,螺纹连接部(18)与加长段杆体(6)顶部螺纹(12)连接,在加长段杆体(6)的锚固螺纹上安装预紧装置,并用加长段杆体(6)的杆尾六棱段(14)与锚杆钻机连接,启动钻机钻进,当托盘(9)与煤壁紧密接触,停止钻进完成加长段杆体(6)的安装,重复上述步骤完成巷道掘进支护;d.支护完成24h-48h之后,锚杆体上的大螺旋结构(2)利用岩体自稳过程与煤体嵌固耦合,产生以嵌固力和摩擦力为主的工作锚固力,再次充分紧固装置的螺母(10),让托盘(9)挤压煤壁,使杆体大螺旋结构径向与煤壁板状裂隙相互作用,抑制裂隙扩展发育。e.当巷道结构松软或存在裂隙发育,则利用锚杆体的通孔(15)及注浆孔(7)滞后掘进迎头10~30m间隔注浆;e.巷道投入使用后,受采动影响,根据矿压显现实际,进行补充注浆加固。
- 根据权利要求4所述的可扩展的扩孔自锚式锚杆支护方法,其特征在于:所述大螺旋结构(2)沿钻进段杆体(3)和加长段杆体(6)全长布置;螺旋方向为右旋,螺旋角度在10°-60°之间;螺旋螺距在20mm-100mm之间,牙高在10mm-30mm之间,螺旋牙厚在2mm-20mm。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US15/751,808 US10767480B2 (en) | 2016-11-25 | 2017-06-07 | Extensible reaming self-anchoring anchor rod and supporting method thereof |
CA2994061A CA2994061C (en) | 2016-11-25 | 2017-06-07 | Supporting method of an extensible reaming self-anchoring anchor rod |
AU2017301079A AU2017301079B2 (en) | 2016-11-25 | 2017-06-07 | Supporting Method of An Extensible Reaming Self-Anchoring Anchor Rod |
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CN201611059159.6A CN106437801B (zh) | 2016-11-25 | 2016-11-25 | 一种可扩展的扩孔自锚式锚杆及支护方法 |
CN201611059159.6 | 2016-11-25 |
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WO2018095012A1 true WO2018095012A1 (zh) | 2018-05-31 |
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PCT/CN2017/087492 WO2018095012A1 (zh) | 2016-11-25 | 2017-06-07 | 一种可扩展的扩孔自锚式锚杆及支护方法 |
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US (1) | US10767480B2 (zh) |
CN (1) | CN106437801B (zh) |
AU (1) | AU2017301079B2 (zh) |
WO (1) | WO2018095012A1 (zh) |
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CN114412524A (zh) * | 2022-01-07 | 2022-04-29 | 中国矿业大学 | 一种动态注浆的本安型锚注加固-瓦斯抽采增效两用系统 |
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CN116498359A (zh) * | 2023-06-28 | 2023-07-28 | 吉林铁道职业技术学院 | 一种土木工程锚杆施工装置 |
CN116498359B (zh) * | 2023-06-28 | 2023-12-05 | 吉林铁道职业技术学院 | 一种土木工程锚杆施工装置 |
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US10767480B2 (en) | 2020-09-08 |
CN106437801A (zh) | 2017-02-22 |
US20200217201A1 (en) | 2020-07-09 |
CN106437801B (zh) | 2018-04-13 |
AU2017301079A1 (en) | 2018-06-14 |
AU2017301079B2 (en) | 2019-07-11 |
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