JPH0660553B2 - Drilling method and device - Google Patents
Drilling method and deviceInfo
- Publication number
- JPH0660553B2 JPH0660553B2 JP1050984A JP5098489A JPH0660553B2 JP H0660553 B2 JPH0660553 B2 JP H0660553B2 JP 1050984 A JP1050984 A JP 1050984A JP 5098489 A JP5098489 A JP 5098489A JP H0660553 B2 JPH0660553 B2 JP H0660553B2
- Authority
- JP
- Japan
- Prior art keywords
- compressed air
- air supply
- supply source
- bubble
- bubbles
- 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.)
- Expired - Lifetime
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- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Description
本発明は、削岩機を使用して、火薬装填孔、ロックボル
ト孔あるいはアンカーボルト孔等を穿孔する方法とその
装置に関する。The present invention relates to a method and a device for boring a powder charge hole, a lock bolt hole, an anchor bolt hole, etc. using a rock drill.
従来、削岩機によって行っている上記各種の孔の穿孔作
業において、くり粉を孔外に円滑に排出し、かつ粉塵の
発生を防止するために、大量の水を使用している。すな
わち、当該削岩機の先端部のウォータースイーベルから
送給した水を、ロッドの送水孔を通じビット先端から噴
出させ、これによって、くり粉を孔外に流出するととも
に、粉塵が立ち込めるのを防止しているものである。 一般のドリフターで、上記における水の使用量は毎分３
０〜６０（水圧約３kg/cm2）に達しているとともに、
この大量の水を使用できるのは、亀裂が少なく、かつ、
水によって汚泥化しない地山性質のところに限られる等
の問題があり、大量の水を使ってする穿孔法はいずれに
しても欠点が多い。 この欠点を避けるために、水に代えて圧縮空気を使用す
ると、今度は粉塵が多くなり穿孔作業環境を悪化する。
特に、それは坑内作業であるとき顕著である。また、圧
縮空気のみで穿孔する場合、ビットの温度が上昇しその
寿命を縮める。 発明者らは、これらの欠点を解決すべく鋭意研究の結
果、上記圧縮空気に気泡を混入することによって、くり
粉をスラリー状にして排出でき、水あるいは圧縮空気を
単独で使用したときの上記諸々の欠点を全て解消できる
との知見を得た。 しかしながら、一般に、当該工事現場で種々の作業機械
のために用意されているコンプレッサー等圧縮空気供給
源から送気管によって送気される圧縮空気の圧力（例え
ば８kg/cm2）は、削岩機のビット尖端ではかなりの程度
（例えば２kg/cm2）に減圧しているものである。 そのため、例えば送気管の途中に気泡発生装置を直列に
接続して、その圧縮空気に気泡を混入させようとする
と、上記ビット尖端における圧力は該気泡発生装置中の
抵抗分だけさらに低下し、噴出空気量も少なくなる。 穿孔しようとする地山が硬岩の場合は、穿孔速度が遅い
ので単位時間当たりのくり粉量が少なく、したがって、
噴出空気量の減少は必ずしも差支えとならないが、軟岩
の場合には、穿孔速度が速いため噴出空気量が少ない
と、くり粉の排出を十分に行えなくなり、穿孔作業の妨
げとなる。 また、気泡発生装置中の抵抗による圧力低下を見込み、
削岩機のビット尖端で所定の圧力を得られる元圧の圧縮
空気供給源を別途用意するとなると、極めて不経済であ
る。 そこで、本発明は、当該工事現場で種々の作業機械のた
めに用意されているコンプレッサー等の圧縮空気供給源
から供給する圧縮空気の圧力及び空気量を、少なくても
気泡発生装置の接続使用に起因して減少させることな
く、当該圧縮空気に所要の気泡を混入し、所期の効果を
挙げようとするものである。Conventionally, in the drilling work of the above various holes performed by a rock drilling machine, a large amount of water is used in order to smoothly discharge the dust and to prevent the generation of dust. That is, the water sent from the water swivel at the tip of the rock drill is ejected from the tip of the bit through the water feed hole of the rod, which allows the dust to flow out of the hole and prevent dust from entering. It is what In a general drifter, the amount of water used in the above is 3 per minute.
While reaching 0-60 (water pressure of about 3 kg / cm 2 ),
This large amount of water can be used because there are few cracks and
There are problems such as being limited to natural rocks that do not become sludge by water, and the drilling method using a large amount of water has many drawbacks in any case. If compressed air is used instead of water in order to avoid this drawback, a large amount of dust will be produced, and the drilling work environment will be deteriorated.
Especially when it is underground work. Also, when drilling only with compressed air, the temperature of the bit rises, shortening its life. As a result of earnest research to solve these drawbacks, the inventors of the present invention were able to discharge the starch powder in the form of slurry by mixing bubbles in the compressed air, and to remove the above-mentioned when water or compressed air was used alone. We have obtained the knowledge that all the drawbacks can be resolved. However, in general, the pressure of compressed air (for example, 8 kg / cm 2 ) sent from a compressed air supply source such as a compressor prepared for various working machines at the construction site by an air supply pipe is At the tip of the bit, the pressure is reduced to a considerable degree (for example, 2 kg / cm 2 ). Therefore, if, for example, a bubble generator is connected in series in the middle of the air supply pipe and it is attempted to mix bubbles in the compressed air, the pressure at the tip of the bit is further reduced by the resistance in the bubble generator, and jetting is performed. The amount of air also decreases. When the rock to be drilled is hard rock, the drilling speed is slow and the amount of boll powder per unit time is small.
Although the decrease in the amount of air blown out is not necessarily a hindrance, in the case of soft rock, if the amount of air blown out is small because the drilling speed is high, it is not possible to discharge the dust powder sufficiently, which hinders the drilling work. In addition, we anticipate a pressure drop due to resistance in the bubble generator,
It is extremely uneconomical to separately prepare a source of compressed air at a source pressure that can obtain a predetermined pressure at the tip of a rock drill bit. Therefore, the present invention is to use the pressure and the amount of compressed air supplied from a compressed air supply source such as a compressor, which is prepared for various work machines at the construction site, to connect and use a bubble generator at least. It is intended to mix desired air bubbles into the compressed air without reducing the amount, and to achieve the desired effect.
上記目的を達成するために採用した本発明の構成は、次
のとおりである。 本発明穿孔方法は、圧縮空気供給源１から削岩機ａへ送
給中の圧縮空気に気泡発生装置ｂから送出する気泡を混
入し、その気泡混入圧縮空気を削岩機ａのビット１２か
ら噴出させ、気泡によりくり粉をスラリー状にして排出
しながら削孔するものである。 請求項２記載の本発明穿孔装置は、削岩機ａのスイーベ
ルジョイント３と圧縮空気供給源１とを接続する送気管
２の途中に気泡発生装置ｂの吐出口４を接続してなり、
上記送気管２において送給中の圧縮空気に気泡を混入す
るようにしたものである。 請求項３記載の本発明穿孔装置は、上記請求項２記載の
本発明穿孔装置の気泡発生装置ｂの起泡剤溶液送込口８
に起泡剤溶液供給源９を、また、該気泡発生装置ｂの圧
縮空気送込口６に上記圧縮空気供給源１より高圧の他の
圧縮空気供給源７をそれぞれ配管接続したものである。 ところで、一般に、起泡剤溶液の濃度を上げることによ
って、気泡を発生させるのに必要な圧縮空気の量を減少
させることができる。 しかし、起泡剤溶液の濃度や量はノミ下がりにあまり影
響しない。ただ起泡剤溶液の使用量を0.2／minより少
ない例えば0.1／minに減らすと粉塵が発生し始める。 このため、起泡剤溶液の量は、0.2／min程度が、経済
性、粉塵の出方、地盤の汚泥軟弱化等の点からみて好適
と認められる。 起泡剤溶液の使用量0.2／minは、従来の水の使用量３
０〜６０／minの１５０分の１〜２００分の１と少な
く、特に泥土化しやすい地山を穿孔する場合において
も、路盤を軟弱化することが少ない。 気泡は、それによってくり粉の流動性を高めスラリー化
して、それを孔壁に生じている亀裂に流入させるととも
に、余分なものを孔外に排出させ、その際に粉塵が発生
することのないことをもって足るから、あまり持続性の
あるものであることを要しない。The configuration of the present invention adopted to achieve the above object is as follows. In the drilling method of the present invention, the bubbles sent from the bubble generating device b are mixed into the compressed air being fed from the compressed air supply source 1 to the rock drill a, and the compressed air mixed with the bubbles is supplied from the bit 12 of the rock drill a. A hole is formed by ejecting the foam and forming a slurry of the starch powder by the air bubbles and discharging it. In the drilling device of the present invention according to claim 2, the discharge port 4 of the bubble generating device b is connected in the middle of the air supply pipe 2 that connects the swivel joint 3 of the rock drill a and the compressed air supply source 1.
Air bubbles are mixed in the compressed air being fed in the air feeding pipe 2. The punching device of the present invention according to claim 3 is the foaming agent solution feed port 8 of the bubble generating device b of the punching device of the present invention according to claim 2.
The foaming agent solution supply source 9 is connected to the compressed air supply port 6 of the bubble generating device b, and another compressed air supply source 7 having a higher pressure than the compressed air supply source 1 is connected by piping. By the way, generally, by increasing the concentration of the foaming agent solution, the amount of compressed air required to generate bubbles can be reduced. However, the concentration and the amount of the foaming agent solution do not affect the fleas reduction. However, if the amount of the foaming agent solution used is reduced to less than 0.2 / min, for example, 0.1 / min, dust starts to be generated. Therefore, it is considered that the amount of the foaming agent solution of about 0.2 / min is suitable from the viewpoints of economy, dust generation, weakening of sludge in the ground, and the like. The usage of foaming agent solution 0.2 / min is 3
It is as small as 1/150 to 1/200 of 0 to 60 / min, and even in the case of boring a ground that is likely to be mud, the roadbed is rarely weakened. The air bubbles thereby increase the fluidity of the powder and make it into a slurry that flows into the cracks that have formed in the hole wall and also discharges the surplus out of the hole, at which time no dust is generated. It doesn't have to be very sustainable, because it does.
当該工事現場で種々の作業機械のために設置しているコ
ンプレッサー等の圧縮空気供給源から削岩機に供給され
る圧縮空気の圧力及び空気量を、少なくても気泡発生装
置の接続使用に起因して減少させることなく、当該圧縮
空気に気泡を混入し、それをビットから噴出させること
により、削孔にともなって発生するくり粉を気泡でスラ
リー状にし、孔外へ的確に排出する。The pressure and amount of compressed air supplied to the rock drill from a compressed air supply source such as a compressor installed for various work machines at the construction site is at least due to the connection and use of a bubble generator. Then, air bubbles are mixed into the compressed air without being reduced, and the compressed air is ejected from the bit to make the chippings generated by the drilling into a slurry with the air bubbles and accurately discharge it out of the holes.
以下図示の実施例について詳しく述べる。 ａは削岩機、１は当該工事現場で種々の作業機械のため
に用意されているコンプレッサー等の圧縮空気供給源
で、基端をその圧縮空気供給源１に接続した送気管２の
先端を、削岩機ａのスイーベルジョイント３に接続して
いる。 ｂは気泡発生装置で、それは、吐出口４を気泡送出管５
を介し上記送気管２の途中に接続している。 ７は上記圧縮空気供給源１より若干高圧の他の圧縮空気
供給源で、それは、小型コンプレッサー等をもってあて
られ、上記気泡発生装置ｂの圧縮空気送込口６に配管接
続されている。 ９は起泡剤溶液供給源で、それは気泡発生装置ｂの起泡
剤溶液送込口８に配管接続されている。 １０は先端にビット１２を有するロッド、１１はロッド
１０に穿設の通孔で、それは、スイーベルジョイント３
とビット１２に穿設された複数の噴出孔１３に連続して
いる。 上記構成の穿孔装置による穿孔は、次のようにして行わ
れる。 圧縮空気供給源１から送られた圧縮空気が、送気管２、
スイーベルジョイント３、ロッド１０の通孔１１を通っ
てビット１２の噴出孔１３から噴出されるものである
が、このとき同時に、気泡発生装置ｂに、その起泡剤溶
液送込口８から起泡剤溶液を、また圧縮空気送込口６か
ら圧縮空気供給源７の圧縮空気をそれぞれ送り込み、該
気泡発生装置ｂに気泡を発生させて、その気泡を、気泡
送出管５を介して、送気管２に圧入する。 したがって、上記噴出孔１３から噴出する圧縮空気は気
泡を混入し、ビット１２から地山ｃに穿孔する所望の
孔、例えば、火薬装填孔１４の穿孔において、くり粉は
気泡と混合してスラリー１５となり、地山ｃに亀裂１６
がある場合には、その亀裂１６に入り込むとともに、余
分なスラリー１５は後続の気泡混入圧縮空気のフラッシ
ング作用によって火薬装填孔１４外へ排出され、気泡は
比較的短時間内に消失する。 上記実施例では、気泡発生装置ｂへ供給する気泡発生用
の圧縮空気を供給するのに専用の圧縮空気供給源７を設
置したが、くり粉排出用の圧縮空気を供給する上記圧縮
空気供給源１を共用し、気泡発生用の圧縮空気を得るこ
ともできる。 その場合は、圧縮空気供給源１と気泡発生装置ｂを結ぶ
配管中に所要の圧力調整装置を設置することにより所要
の高圧力を得るとか、あるいはまた、送気管２と気泡送
出管５とを所要の空気エゼクタを介して接続するとかす
るものである。The illustrated embodiment will be described in detail below. a is a rock drilling machine, 1 is a compressed air supply source such as a compressor prepared for various work machines at the construction site, and a tip of an air supply pipe 2 whose base end is connected to the compressed air supply source 1 is , Connected to the swivel joint 3 of the rock drill a. b is a bubble generator, which has a discharge port 4 and a bubble delivery pipe 5
It is connected in the middle of the air supply pipe 2 via. Reference numeral 7 is another compressed air supply source having a pressure slightly higher than that of the compressed air supply source 1, which is provided with a small compressor or the like and is connected to the compressed air inlet 6 of the bubble generating device b by piping. A foaming agent solution supply source 9 is connected to the foaming agent solution inlet 8 of the bubble generating device b by piping. Reference numeral 10 is a rod having a bit 12 at its tip, 11 is a through hole formed in the rod 10, which is a swivel joint 3
And the plurality of ejection holes 13 formed in the bit 12 are continuous. The punching by the punching device having the above configuration is performed as follows. Compressed air sent from the compressed air supply source 1
Although it is ejected from the ejection hole 13 of the bit 12 through the swivel joint 3 and the through hole 11 of the rod 10, at the same time, foam is generated from the foaming agent solution inlet 8 to the bubble generator b. The agent solution and the compressed air from the compressed air supply source 7 are respectively fed from the compressed air feed port 6 to generate bubbles in the bubble generating device b, and the bubbles are fed through the bubble feeding pipe 5 to the air feeding pipe. Press into 2. Therefore, the compressed air ejected from the ejection hole 13 mixes air bubbles, and in the desired hole for boring from the bit 12 to the ground c, for example, the gunpowder loading hole 14, the dust powder is mixed with the air bubbles to form the slurry 15 Next, crack 16 in natural ground c
If any, the extra slurry 15 is discharged out of the explosive loading hole 14 by the subsequent flushing action of the bubble-containing compressed air, and the bubbles disappear within a relatively short period of time while entering the cracks 16. In the above-mentioned embodiment, the dedicated compressed air supply source 7 is installed to supply the compressed air for bubble generation to be supplied to the bubble generator b. It is also possible to share 1 to obtain compressed air for bubble generation. In that case, a required high pressure is obtained by installing a required pressure adjusting device in the pipe connecting the compressed air supply source 1 and the bubble generating device b, or alternatively, the air supply pipe 2 and the bubble delivery pipe 5 are connected. The connection is made through a required air ejector.
以上述べたところから明らかなように、本発明によれ
ば、次の効果がある。 くり粉を気泡によってスラリー化し、そのスラリーを
後続の気泡混入圧縮空気のフラッシング作用によって孔
外へ排出でき、かつ、該気泡は比較的短時間内に消失
し、粉塵を発生させない。 削岩機のビットは、気泡によって冷却され、圧縮空気
だけを使用して穿孔する場合のように、ビットが過熱し
その寿命を縮めるというようなことがない。 気泡の圧縮空気への混入は、圧縮空気供給源から削岩
機へ送給中のくり粉排出用の圧縮空気に対し行うので、
換言すると、削岩機のスイーベルジョイントと上記圧縮
空気供給源とを接続する送気管の途中に気泡発生装置の
吐出口を接続しておいて行うので、そのくり粉排出用の
圧縮空気の圧力が、気泡発生装置をその圧縮空気の供給
経路に直列に接続する場合のように、気泡発生装置の抵
抗によって、低下することはない。 上記に加え、請求項３記載の発明は、上記気泡発生装
置の圧縮空気送込口に送り込む気泡発生用の圧縮空気の
供給源を、削岩機のビットに送給するくり粉排出用の圧
縮空気の供給源より高圧の他の圧縮空気供給源としたの
て、上記送気管において送給中の圧縮空気に対する気泡
の混入を一層確実に行うことができる。 前述のように、例えば、上記送気管の途中に気泡発生
装置を直列に接続しておき、その送気管で送給されてい
るくり粉排出用の圧縮空気に気泡を混入させようとする
と、削岩機のビット尖端における空気圧力は該気泡発生
装置中の抵抗分だけ低下し、噴出空気量も少なくなり、
特に、軟岩に対する穿孔速度のようにそれが速いために
多くの噴出空気量を必要とする場合には、くり粉の排出
を十分に行えなくなり、穿孔作業の妨げものであるが、
本発明はこのような欠点を解消できる。As is clear from the above description, the present invention has the following effects. The ground powder is slurried by bubbles, and the slurry can be discharged to the outside of the holes by the subsequent flushing action of the bubble-containing compressed air, and the bubbles disappear within a relatively short period of time, and dust is not generated. Rock drill bits are cooled by air bubbles and do not overheat and shorten their life as they would when drilling using compressed air alone. Since air bubbles are mixed into the compressed air, compressed air for discharging the dust powder that is being fed from the compressed air supply source to the rock drill is used.
In other words, since the discharge port of the bubble generating device is connected in the middle of the air supply pipe that connects the swivel joint of the rock drill and the compressed air supply source, the pressure of the compressed air for discharging the starch powder is increased. As in the case where the bubble generator is connected in series to the compressed air supply path, the resistance does not decrease due to the resistance of the bubble generator. In addition to the above, the invention as set forth in claim 3 is a compression for discharging chipped powder, which supplies a source of compressed air for generating bubbles to the compressed air inlet of the bubble generator to a bit of a rock drill. Since another compressed air supply source having a higher pressure than the air supply source is used, it is possible to more reliably mix bubbles in the compressed air being supplied in the air supply pipe. As described above, for example, if an air bubble generator is connected in series in the middle of the air supply pipe and air bubbles are mixed in the compressed air for discharging the dust powder fed by the air supply pipe, the The air pressure at the tip of the rock drill bit is reduced by the amount of resistance in the bubble generator, and the amount of jet air is also reduced.
In particular, when a large amount of jet air is required because it is fast like the drilling speed for soft rock, it is not possible to sufficiently discharge the dust powder, which hinders the drilling work,
The present invention can eliminate such drawbacks.
図面は本発明の実施例を示すもので、第１図は装置の概
略側面図、第２図は穿孔状態の要部断面図、第３図は穿
孔の縦断面図である。 ａ……削岩機、ｂ……気泡発生装置、１……圧縮空気発
生装置、２……送気管、３……スイーベルジョイント、
４……吐出口、６……圧縮空気送込口、７……圧縮空気
供給源、８……起泡剤溶液送込口、９……起泡剤溶液供
給源。The drawings show an embodiment of the present invention. FIG. 1 is a schematic side view of the apparatus, FIG. 2 is a sectional view of an essential part in a perforated state, and FIG. 3 is a longitudinal sectional view of the perforated. a: rock drill, b: bubble generator, 1 compressed air generator, 2 air supply pipe, 3 swivel joint,
4 ... Discharge port, 6 ... Compressed air feed port, 7 ... Compressed air supply source, 8 ... Foaming agent solution feed port, 9 ... Foaming agent solution supply source.
Claims (3)
空気に気泡発生装置から送出する気泡を混入し、その気
泡混入圧縮空気を削岩機のビットから噴出させ、気泡に
よりくり粉をスラリー状にして排出しながら削孔するこ
とを特徴とする穿孔方法。1. A bubble blown from a bubble generator is mixed with compressed air being fed from a compressed air supply source to a rock drill, and the compressed air mixed with the bubble is ejected from a bit of the rock drill to generate a bubble. A perforating method, characterized in that the powder is slurried and discharged while drilling.
供給源とを接続する送気管の途中に気泡発生装置の吐出
口を接続してなり、上記送気管において送給中の圧縮空
気に気泡を混入するようにしたことを特徴とする穿孔装
置。2. A discharge port of a bubble generating device is connected in the middle of an air supply pipe connecting a swivel joint of a rock drill and a compressed air supply source, and air bubbles are added to compressed air being supplied in the air supply pipe. A punching device characterized by being mixed.
供給源とを接続する送気管の途中に気泡発生装置の吐出
口を接続するとともに、その気泡発生装置の起泡剤溶液
送込口に起泡剤溶液供給源を、また、該気泡発生装置の
圧縮空気送込口に上記圧縮空気供給源より高圧の他の圧
縮空気供給源をそれぞれ配管接続してなり、上記送気管
において送給中の圧縮空気に気泡を混入するようにした
ことを特徴とする穿孔装置。3. A discharge port of a bubble generating device is connected in the middle of an air supply pipe connecting a swivel joint of a rock drilling machine and a compressed air supply source, and the discharge port of the foam generating agent of the bubble generating device is connected to the discharge port. A foaming agent solution supply source, and another compressed air supply source having a higher pressure than the compressed air supply source are connected to the compressed air supply port of the bubble generating device by piping, respectively. A punching device characterized in that bubbles are mixed into compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050984A JPH0660553B2 (en) | 1989-03-04 | 1989-03-04 | Drilling method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050984A JPH0660553B2 (en) | 1989-03-04 | 1989-03-04 | Drilling method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02232496A JPH02232496A (en) | 1990-09-14 |
| JPH0660553B2 true JPH0660553B2 (en) | 1994-08-10 |
Family
ID=12874061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1050984A Expired - Lifetime JPH0660553B2 (en) | 1989-03-04 | 1989-03-04 | Drilling method and device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0660553B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014114570A (en) * | 2012-12-07 | 2014-06-26 | Furukawa Rock Drill Co Ltd | Feeding device for flushing medium for boring |
-
1989
- 1989-03-04 JP JP1050984A patent/JPH0660553B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014114570A (en) * | 2012-12-07 | 2014-06-26 | Furukawa Rock Drill Co Ltd | Feeding device for flushing medium for boring |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02232496A (en) | 1990-09-14 |
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