EP3339568B1 - Tool and method for breaking up rock - Google Patents

Description

The present invention relates to a demolition tool and a method for demolishing rock. Rock in the sense of the invention is both natural rock and artificial rock, such as concrete.

Various methods for rock demolition are known from the prior art. Rocks are currently usually mined by blasting, using a hydraulic hammer or using the drilling and splitting technique. In the drilling-splitting technique, holes are drilled in rows in the rock to be mined, into which wedge-shaped splitting tools are subsequently inserted in order to split the rock.

The EP 2 489 823 B1 describes an apparatus and a method for splitting solid materials such as rock and concrete using the drilling-splitting technique. The device comprises a mount with a working head which can be moved transversely on the mount along a first axis and which can be rotated about a second axis in relation to the mount. A drilling device and a splitting device are attached to the working head, which can alternately be brought into the working position.

The DE 10 2013 206 565 B4 shows a hydraulically operated splitting device in the form of a wedge lance, which uses the drilling-splitting method to mine rock.

From the US 1,424,114 A a mining machine is known. This mining machine includes means for making horizontal slots in the material being mined, means for producing a vertical slot which cuts the horizontal slots to form columns and picking means which are arranged between the means for producing the horizontal slots to cut off sections from the column.

It is also known to mine rock with the help of excavator cultivators. In the EP 2 324 158 B1 Such an excavator cultivator is described.

The known rock demolition methods have various advantages and disadvantages. Blasting is currently the most effective method, but is becoming increasingly restricted due to its dangerous nature and the high levels of vibration in the environment. In cases where blasting or drilling is not permitted or possible, the demolition is currently usually carried out using a hydraulic hammer. Hydraulic hammers allow demolition with less environmental pollution, but are far from being as effective as blasting or drilling-gap technology. When blasting or demolition with a hydraulic hammer, large fragments are created in an uncontrolled manner. The fragments usually have to be shredded so that they can then be fed to a crusher. The production performance of excavator attachment cutters essentially depends on the uniaxial compressive strength of the rock to be processed. Demolition with excavator attachments is only economical and sensible up to a uniaxial compressive strength of the rock of 60 MPa. Excavator cultivators are therefore mainly used to mine soft and medium-hard rock, such as limestone or gypsum.

The object of the present invention is therefore a demolition tool and a method for demolishing rock to make available, which enables a more effective rock demolition and at the same time works with low vibration. Slipping of the demolition tool during breaking should be avoided effectively. The piece size of the broken fragments should be controllable in order to be able to adapt them in particular to the size of a crusher. The demolition point should nevertheless have a largely flat surface, if possible without further finishing.

A demolition tool according to the attached claim 1 and a method according to the attached independent claim 13 serve to achieve the object according to the invention.

The demolition tool according to the invention serves to demolish rock. For this purpose, several slots are worked into the rock, between which material to be broken off remains. Preferably two or more slots of a predetermined depth and a predetermined distance from one another are introduced which run essentially parallel to one another. The slots can also run at an angle to one another if this is advantageous at the point of demolition. The demolition tool can be inserted into one of the slots in order to break the rock between the slots by building up transverse forces acting essentially perpendicular to the slot planes. The demolition tool has a base body with a first free end area and an opposite second end area. The second end region is designed to exert a compressive force on a second wall section of the slot. The second wall section extends from an beginning of the slot opposite the floor. The base body is fixedly connected at its second end region to a mounting bracket for mounting the demolition tool on a movable support arm of a construction machine, in particular an excavator. The Demolition tools can preferably be attached to the same construction machine to which a cutting wheel used to mill the slots can also be attached, in exchange for this. The construction machine is preferably equipped with an automatic quick-change device for quick and effortless conversion between the cutting wheel and the demolition tool according to the invention. The support arm of the construction machine or excavator exerts the necessary forces to move the demolition tool into the desired position and to move it into the slots in the rock.

At least one scribing tool is arranged on the first end region of the base body and is used to introduce a scribe running parallel to the bottom of the slot into the first, lower-lying wall section of the slot. The incision extends only over a defined depth into the wall section, preferably less than half the thickness of the wall section. The scratch does not cut through the rock completely, so that the wall section initially remains. There is no cutting through of the rock in the area of the first wall section into the adjacent slots. This saves cutting performance and enables the targeted breaking off of the material at the desired time. A compressive force is exerted on the second wall section of the slot via the second end area, which then causes the material to break off in the area of the scratch.

The demolition tool according to the invention has several advantages compared to the previously known demolition tools. In this way, large amounts of rock can be efficiently broken with the demolition tool according to the invention. In addition, the demolition takes place with little vibration. This is an essential advantage compared to blowing up. A scratch is created by the scratch generated by the scratching tool, which ensures a controlled breaking of the rock. A relatively smooth fracture surface is created at the bottom of the slot.

According to an advantageous embodiment, the demolition tool comprises several scoring tools. Several scribing tools enable quick and even scribing.

An advantageous embodiment uses a demolition tool with a cylindrical base body, each of which has an elliptical cross-sectional expansion in the first and the second end region. Two opposite first cross-sectional areas of the elliptical cross-sectional extension have a larger diameter than two opposite second cross-sectional areas of the elliptical cross-sectional expansion. The at least one scoring tool arranged in the first end region is arranged on one of the first cross-sectional regions.

A preferred further developed embodiment uses several scoring tools in each of the first two cross-sectional areas. The diameter of the second cross-sectional areas corresponds approximately to the width of the slots, the diameter being selected to be slightly smaller in order to be able to insert the demolition tool into the slot. The demolition tool can be inserted into the slot either from above or from the side. The demolition tool inserted into the slot is subsequently rotated, the at least one scoring tool coming into contact with the first wall section and producing the scoring. At the same time, a pressure force is exerted on the second wall section through the second end region in order to break the material between the slots. This embodiment of the demolition tool is particularly suitable for compact and hard rock.

According to an alternative embodiment, the demolition tool has a base body with a convexly curved longitudinal side. The base body has a cross section increasing from the first end region to the second end region, i. H. the width of the demolition tool increases from a tip at the first end towards the opposite end. The side opposite the convex long side is preferably concavely curved, but can also be essentially straight. The first end region of the base body is preferably equipped with a plurality of scribing tools, which preferably extend from the first end region as an extension of the first end region. The first end region of the demolition tool has a slightly larger width than the slot. The demolition tool designed in this way is inserted laterally into the slot with its first end region and moved linearly through the slot. The scoring tools come into contact with the first wall section and produce the scoring. At the same time, the rock between the slots is broken by the compressive force exerted by the second wall section. This pressure force acts due to the increasing cross section of the base body in the longitudinal direction of the base body. This embodiment can preferably be used in medium-hard or fissured material.

According to a further developed embodiment, the second end area, which is closer to the mounting bracket than the first end area, has a breaking tool for exerting a compressive force on the second, less deep wall section of the slot. The due to the in the longitudinal direction of the base body increasing cross-section of the base body on the second wall section compressive force is reinforced by the crushing tool arranged in the second end region of the base body. This embodiment has the advantage that the demolition tool can effectively be prevented from slipping through the slot by the cross-section of the base body which widens in the longitudinal direction and by the pressure force exerted by means of the breaking tool.

Various implementations are available for the crushing tool. A preferred embodiment uses a breaking tool designed as a breaking wedge. The breaking wedge is partially wider than the base body. It has proven to be expedient to make the broad side of the crushing wedge about 30% to 40% wider than the base body, with no restriction to the range of values mentioned, wider or narrower crushing wedges are quite possible. The crushing wedge can preferably be driven hydraulically by the construction machine, for example by a bucket cylinder of the excavator. The pressure force exerted by means of a crushing wedge acts in addition to the pressure force generated by the base body and ensures that the rock is broken and completely removed from a quarrying wall. The crushing wedge is preferably equipped on its outer circumference with a plurality of plates which serve for stiffening and are preferably replaceable as wearing parts. Versions with four plates, which extend on both sides from the breaking wedge tip in the direction of the base body, have proven to be favorable.

An alternative embodiment uses a breaking tool designed as a hydraulic hammer. The hydraulic hammer comprises an impact mechanism and a chisel, which is preferably extends perpendicular to the longitudinal axis of the demolition tool. The chisel is driven into the rock with the help of the striking mechanism, creates a notch and removes it from the bond.

According to a further advantageous embodiment, the breaking tool can be an eccentric hammer mechanism. Eccentric striking mechanism and hydraulic hammer are preferably used when the rock to be crushed has a uniaxial compressive strength greater than 60 MPa. With a lower uniaxial compressive strength, the crushing wedge is preferably used. The crushing wedge, hydraulic hammer and eccentric hammer mechanism are preferably detachably connected to the base body and are used depending on the type of rock.

The base body of the demolition tool can be constructed in several parts. The first end region carrying the at least one scoring tool is preferably designed as a separate component which is preferably detachably connected to the base body. If the scoring tool is worn out, the component carrying the scoring tool can be replaced with little effort. The base body can further comprise a plurality of plates arranged on its outer circumference, which serve to stiffen the base body and thus improve its stability. These plates are preferably designed as replaceable wear parts. In the embodiments which use a base body with a convexly curved longitudinal side, the base body preferably has a plurality of plates which are convexly curved in the longitudinal direction and are firmly connected to one another.

In the embodiments with a crushing tool, it has proven to be advantageous to equip the base body with a base plate arranged in the second end region. The breaking tool is preferably releasably attached to the base plate. Breaking tool and base plate can also be firmly connected to one another and releasably connected to the base body as a structural unit.

The method according to the invention for rock demolition comprises the steps described below. First, at least two slots that run parallel to each other are milled into the rock. The slots can be made both horizontally and vertically in the rock. They have a predetermined depth, a predetermined width and a predetermined distance from one another. The depth and width of the slots to be selected and the respective distance between the slots depend on the nature of the material to be broken. Influencing factors here are the rock hardness and the rock structure of the material to be crushed. In addition, depth, width and distance influence the grain size of the end product. The parameters of the slots are also dependent on the dimensioning of the demolition tool used in the subsequent process step. The depth of the slots should preferably correspond to the length, ie the depth of penetration of the demolition tool. The width of the slots must also be adapted to the width of the demolition tool. The slots are preferably introduced with the aid of a cutting wheel equipped with suitable milling tools. For example, cutting wheels equipped with hard metal tools are suitable for milling rock. The hard metal tools can be designed as round shank chisels. The cutting wheel is preferably driven hydraulically or by means of the drive shaft of a construction vehicle, for example a tractor shaft. Cutting wheels designed as attachments have proven to be cheap, which are suitable for mounting on a movable support arm of a construction machine, such as an excavator, backhoe loader or tractor. By means of The rock is relieved of space and can then be broken efficiently.

After the slits have been made, a slit running parallel to a bottom of the slit is produced in a first wall section of one of the slits with the aid of the scribing tool. It must be ensured here that the slot in which the scratch is produced is located at least adjacent to another slot, preferably between two of the other slots, since the material is to be broken between two slots according to the method. The scratch created only extends to a defined depth in the rock material and does not cut through the wall section. During the generation of the scratch or immediately afterwards, the material located between the slots is broken at the same time. This is done by exerting a compressive force on a second wall section of the slot. The second wall portion of the slot extends from a bottom of the slot opposite the bottom. The pressure force is generated by the base body. In the designs with a breaking tool, the compressive force acting on the second wall section is additionally increased by the breaking tool arranged on the base body.

The method according to the invention has the advantage, among other things, that the piece size of the broken rock can be adapted to the dimensions of a crusher subsequently used for comminution. For this purpose, the depth or width of the slots or the spacing of the slots from one another are varied accordingly. On the other hand, demolition using a hydraulic hammer or blasting delivers uncontrolled large fragments, which usually have to be shredded in order to be able to feed them to the crusher. When demolition of reinforced Concrete reinforcement bars present in the concrete can be cut using the tool used to create the slots.

The process has been successfully tested with slot depths from 500 mm to 1000 mm. However, there should be no restriction to the slot depths mentioned. Other slot depths are quite possible.

Fig. 1:

eine perspektivische Teildarstellung einer ersten Ausführungsform eines erfindungsgemäßen Abbruchwerkzeuges;

Fig. 2:

eine Prinzipdarstellung zum Fräsen eines Schlitzes in ein Gestein;

Fig. 3:

eine Schnittansicht des in dem Schlitz eingebrachten Abbruchwerkzeuges gemäß Fig. 1;

Fig. 4:

ein Detail A aus Fig. 3;

Fig. 5:

eine Schnittansicht im Moment des Brechens des Gesteins mittels des Abbruchwerkzeuges gemäß Fig. 1;

Fig. 6:

ein Detail B aus Fig. 5;

Fig. 7:

eine perspektivische Darstellung einer zweiten Ausführungsform des erfindungsgemäßen Abbruchwerkzeuges;

Fig. 8:

eine Schnittansicht im Moment des Brechens des Gesteins mittels des Abbruchwerkzeuges gemäß Fig. 7.

Fig. 9:

eine erste perspektivische Darstellung einer dritten Ausführungsform des erfindungsgemäßen Abbruchwerkzeuges;

Fig. 10:

eine zweite perspektivische Darstellung der dritten Ausführungsform des Abbruchwerkzeuges;

Fig. 11:

ein Detail A aus Fig. 10;

Fig. 12:

eine perspektivische Darstellung einer vierten Ausführungsform des Abbruchwerkzeuges;

Fig. 13:

ein Detail B aus Fig. 12;

Fig. 14:

eine perspektivische Darstellung einer fünften Ausführungsform des Abbruchwerkzeuges;

Fig. 15:

ein Detail C aus Fig. 14;

Fig. 16:

eine Schnittansicht des in einem Schlitz in einem Gestein eingebrachten Abbruchwerkzeuges gemäß Fig. 9.

Preferred embodiments of the invention and their advantages and details are explained in more detail below with reference to the attached figures. Show it:

Fig. 1:

a partial perspective view of a first embodiment of a demolition tool according to the invention;

Fig. 2:

a schematic diagram for milling a slot in a rock;

Fig. 3:

a sectional view of the demolition tool inserted into the slot Fig. 1 ;

Fig. 4:

a detail A from Fig. 3 ;

Fig. 5:

a sectional view at the moment of breaking the rock by means of the demolition tool Fig. 1 ;

Fig. 6:

a detail B. Fig. 5 ;

Fig. 7:

a perspective view of a second embodiment of the demolition tool according to the invention;

Fig. 8:

a sectional view at the moment of breaking the rock by means of the demolition tool Fig. 7 .

Fig. 9:

a first perspective view of a third embodiment of the demolition tool according to the invention;

Fig. 10:

a second perspective view of the third embodiment of the demolition tool;

Fig. 11:

a detail A from Fig. 10 ;

Fig. 12:

a perspective view of a fourth embodiment of the demolition tool;

Fig. 13:

a detail B. Fig. 12 ;

Fig. 14:

a perspective view of a fifth embodiment of the demolition tool;

Fig. 15:

a detail C. Fig. 14 ;

Fig. 16:

a sectional view of the demolition tool inserted in a slot in a rock according to Fig. 9 .

Fig. 1 shows a partial perspective view of a first embodiment of a demolition tool 01 according to the invention. The demolition tool 01 according to the invention comprises a cylindrical base body 02 does not expand the cross section of the end region in a rotationally symmetrical manner. Two opposite first cross-sectional areas of the elliptical cross-sectional expansion have a larger diameter than two opposite second cross-sectional areas of the elliptical cross-sectional expansion. At first In cross-sectional areas, three scribing tools 05 are arranged. In modified embodiments, more than three or fewer than three scribing tools 05 can also be used. There is also the possibility that only one of the first two cross-sectional areas is equipped with scribing tools 05. An attachment bracket 07 is fixedly connected to the second end region 04 of the base body 02 and is used to fasten the demolition tool 01 to a movable support arm of a construction machine.

In the following, the Figures 2 to 6 the method according to the invention for rock demolition will be explained in more detail. In the first method step, at least two, preferably three slots 08 running parallel to one another are milled into the rock 09. In Fig. 2 the milling of one of the slots 08 is shown. The slot 08 is introduced using a known cutting wheel 10. The cutting wheel 10 is designed as an attachment for a construction machine 12. There is a firm, detachable connection between construction machine 12 and cutting wheel 10. The cutting wheel 10 is equipped with numerous milling tools 13, which in the embodiment shown are designed as round shank chisels. Construction machine 12 may be an excavator, backhoe loader, or tractor. The cutting wheel 10 is driven hydraulically by the construction machine or with the aid of a working shaft. According to the method, at least two, preferably three slots 08 of identical dimensions are made in the rock 09.

After the slots 08 have been introduced, the demolition tool 01 is preferably inserted into the middle of the three slots 08. Fig. 3 shows the demolition tool 01 arranged within the slot 08. The demolition tool 01 can be inserted into the slot 08 from above or from the side. The diameter The second cross-sectional areas of the elliptical cross-sectional expansion of the base body 02 of the demolition tool 01 is preferably slightly smaller than the width of the slots 08 in order to be able to insert the demolition tool 01 into the slot 08 without any problems.

The in Fig. 4 It can be seen from the detailed illustration shown that the scribing tools 05 in this positioning of the demolition tool 01, that is to say when they are inserted into the slot 08, are not yet in contact with a first wall section 14 of the slot 08. The first wall section 14 extends directly from a floor 15 of the slot 08. Likewise, there is no contact between the second end region 04 of the demolition tool 01 and a second wall section 17 of the slot 08. The second wall section 17 extends from a beginning 18 opposite the floor 15 the slot 08.

After the demolition tool 01 is positioned in the slot, the demolition tool 01 is set in rotation. Here, the scribing tools 05 come into contact with the first wall section 14 and produce a scribe in the first wall section 14 of the slot 08. Simultaneously or by an angular offset, the second end region 04 exerts a compressive force on the second wall section 17 of the slot 08. As a result of this compressive force, the rock 09 breaks between the slots 08. The scratch generated serves as a predetermined breaking point and ensures a controlled breaking of the rock, a relatively smooth fracture surface being created at the bottom of the slot 08. Fig. 5 illustrates the breaking of rock 09 while Fig. 6 which shows the scribing tools 05 in contact with the first wall section 14 of the slot 08.

Fig. 7 shows a perspective view of a second embodiment of the demolition tool 01 according to the invention. The base body 02 of this embodiment is designed in the form of a fang, which is convexly curved on one side in the longitudinal direction. The first end region 03 of the base body 02 is equipped with three scribing tools 05, which extend in the extension of the base body 02. The first end region 03 has a greater width than the slot 08. The demolition tool 01 can be attached to the movable support arm of the construction machine 12 via the attachment bracket 07 (see Fig. 2 ) are grown. The base body 02 has a cross section which increases from the first end region 03 to the axially opposite second end region 04.

The demolition tool 01 according to the second embodiment is inserted laterally with its narrower side into the slot 08 and moved linearly through the slot 08. During this linear movement, the scribing tools 05 contact the first wall section 14 of the slot and produce a scribe running parallel to the bottom 15 of the slot 08. In the meantime, due to the increasing cross section of the base body 02 in the longitudinal direction of the base body 02, a compressive force acts on the second wall section 17 of the slot 08, as a result of which the rock 09 is broken between the slots 08. Fig. 8 illustrates the breaking of stone 09.

The Figures 9 and 10 show perspective representations of a third embodiment of the demolition tool 01 according to the invention Figure 7 shown embodiment, the base body 02 is again in the form of a fang. In the embodiment shown, the base body 02 consists of a plurality of first plates 19 which are fixed to one another are connected. On the outer circumference of the base body 02, in particular on the side surfaces which are exposed to the compressive forces from the side walls in the slot, a plurality of second plates 20 are arranged which serve to stiffen the base body 02 and to protect against wear. The second plates 20 can be made of hard metal and can be interchangeably attached to the first plates 19.

In the embodiment shown, the first end region 03 forming the tip of the fang is designed as a separate component connected to the base body 02. The base body 02 and the first end region 03 can alternatively also be formed in one piece. At the first end region 03, two scribing tools 05 are arranged at the distal end, which extend in the extension of the base body 02. In modified embodiments, more than two scribing tools 05 or only one scribing tool 05 can also be used.

At the second end region 04 of the base body 02, a breaking tool designed as a breaking wedge 22 is arranged, which in Fig. 11 is shown in detail. The crushing wedge 22 is detachably connected to the base body 02 via a base plate 23. The outer circumference, in particular the side surfaces of the breaking wedge 22, which are brought into contact with the side walls in the slot in the rock, is equipped with four third plates 24, which extend on both sides from the breaking wedge tip in the direction of the base body 02 and for stiffening and protection against Wear the breaking wedge 22 serve. On its broad side, which faces the base body 02, the breaking wedge 22 is about 30% to 40% wider than the base body 02. The breaking wedge 22 can be driven by the construction machine, for example with the aid of a spoon cylinder. The from the scribing tools 05 at the bottom of the slot and the Breaking wedge 22 executed movement or the resulting force when breaking the rock is indicated by arrows in the Figures 9 and 10 indicated.

Fig. 12 shows a fourth embodiment of the demolition tool 01. In contrast to that in the Figures 9 to 11 In the embodiment shown, the breaking tool is designed here as a hydraulic hammer 25, which in detail in Fig. 13 is shown. The hydraulic hammer 25 comprises an impact mechanism 26 and a crushing tool 27, which is arranged in a housing 28. With the help of the striking mechanism 26, the crushing chisel 27 is driven into the rock, creates a notch and removes it from the composite. The chisel 27 extends perpendicular to the longitudinal axis of the demolition tool 01. The direction of impact of the striking mechanism 26 should always correspond to the working direction of the demolition tool 01. The impact force thus acts in the direction of the slot. The direction of movement of the demolition tool 01 and the direction of impact of the impact mechanism 26 and the forces resulting therefrom are indicated by arrows in Fig. 12 indicated.

A fifth embodiment of the demolition tool 01 can Fig. 14 be removed. This embodiment also differs from the embodiments according to FIG Figures 9 to 13 only by the breaking tool used. The breaking tool is designed here as an eccentric striking mechanism 29, which is shown in detail in FIG Fig. 15 is shown. The movement exerted by the eccentric striking mechanism 29 is directed in the direction of the mounting bracket 07 and is indicated by a simple arrow. The impact force generated by the eccentric impact mechanism 29, which in turn is directed in the working direction of the demolition tool 01, is shown as a broad arrow in FIG Fig. 14 shown.

Eccentric striking mechanism 29 and hydraulic hammer 25 are preferably used with a uniaxial compressive strength of the rock to be broken greater than 60 MPa. With a lower uniaxial compressive strength, the breaking wedge 22 is preferably used.

Breaking wedge 22, hydraulic hammer 25 and eccentric striking mechanism 29 can optionally be attached to the base body 02. As a result, the demolition tool 01 can be adapted to the respective type of rock with little effort.

In the following, the Figure 16 In particular, the peculiarities are explained which arise for the method according to the invention by using the demolition tool equipped with the breaking tool according to Figures 9 to 15 surrender.

After the slots 08 have been introduced, the demolition tool 01 is preferably inserted into a central one between two adjacent slots 08. Since the demolition tool 01 is wider than the milled slot 08, a breaking edge is always required to insert the demolition tool 01, from which the demolition tool 01 is inserted. The demolition tool 01 is inserted into the slot 08 with its first end region 03, which carries the scribing tools 05, and is moved linearly through the slot 08. During this linear movement, the scribing tools 05 contact the first, lower-lying wall section of the slot 08 and produce a scribe running parallel to the bottom of the slot 08. In the meantime, a pressure force is exerted on the second, less deep wall section of the slot 08, as a result of which the rock 09 is broken between the slots 08. This pressure force is generated on the one hand by the cross section of the main body 02 increasing in the longitudinal direction of the main body 02 and on the other hand by the breaking tool designed as a breaking wedge 22, hydraulic hammer 25 or eccentric hammer mechanism 29. The rock 09 is pre-broken by the action of the base body 02. The crushing tool ensures that the rock 09 is completely detached. Fig. 16 illustrates the breaking of the rock 09, which is pressed simultaneously into the two adjacent slots 08.

Reference list

01 -

Demolition tool

02 -

Basic body

03 -

first end region of the base body

04 -

second end region of the base body

05 -

Scoring tool

06 -

-

07 -

Mounting bracket

08 -

slot

09 -

rock

10 -

Cutting wheel

11 -

-

12 -

Construction machine

13 -

Milling tools

14 -

first wall section

15 -

Bottom of the slot

16 -

-

17 -

second wall section

18 -

Beginning of the slot

19 -

first records

20 -

second plates

21 -

-

22 -

Crowbar

23 -

Base plate

24 -

third plates

25 -

Hydraulic hammer

26 -

Percussion

27 -

Crushing chisels

28 -

casing

29 -

Eccentric striking mechanism

Claims (15)

1. A demolition tool (01) for the demolition of rock (09), wherein slots (08) with a predetermined depth and at a predetermined distance to each other are introduced into the rock (09), wherein the demolition tool (01) can be respectively inserted into one of the slots (08) in order to break the rock (09) between the slots (08), wherein the demolition tool (01) comprises the following components:

   - a base body (02) with

   ▪ a first end region (03), which comprises at least one scribing tool (05) for creating a score that runs parallel to a bottom (15) of the slot (08) into a first wall section (14) of the slot (08), wherein the first wall section (14) immediately extends from the bottom (15) of the slot (08) and the score does not severe the wall section, and

   ▪ a second end region (04), which is designed to exert a compressive force onto a second wall section (17) of the slot (08), wherein the second wall section (17) extends from a beginning of the slot (08) opposite to the bottom (15);

   - a fitting bracket (07) firmly connected to the base body (02) on the second end region (04) for attaching the demolition tool (01) to a moveable carrier arm of a construction machine (12).
2. The demolition tool (01) according to Claim 1, characterized in that the base body (02) of the demolition tool (01) is cylindrical and has an elliptical cross-sectional extension each in the first and the second end region (03, 04), and that at least said one scribing tool (05) arranged in the first end region (03) is arranged on the cross-sectional extension.
3. The demolition tool (01) according to Claim 2, characterized in that it has a plurality of scribing tools (05).
4. The demolition tool (01) according to Claim 1, characterized in that the base body (02) of the demolition tool (01) has a convex curved longitudinal side and a cross-section increasing from the first end region (03) to the second end region (04).
5. The demolition tool (01) according to Claim 4, characterized in that the second end region (04) has a crushing tool for applying the compressive force to the second wall section (17).
6. The demolition tool (01) according to Claim 5, characterized in that the crushing tool is detachably connected to the base body (02).
7. The demolition tool (01) according to Claim 5 or 6, characterized in that the crushing tool is a crushing wedge (22), wherein the crushing wedge (22) is formed at its wide side wider than the base body (02).
8. The demolition tool (01) according to Claim 7, characterized in that the crushing wedge (22) on its wide side is 30% to 40% wider than the base body (02).
9. The demolition tool (01) according to Claim 7 or 8, characterized in that the crushing wedge (22) can be hydraulically driven by the construction machine (12).
10. The demolition tool (01) according to Claim 5 or 6, characterized in that the crushing tool is a hydraulic hammer (25), wherein the hydraulic hammer (25) comprises a striking mechanism (26) and a crushing chisel (27).
11. The demolition tool (01) according to Claim 5 or 6, characterized in that the crushing tool is an eccentric striking mechanism (29).
12. The demolition tool (01) according to any one of Claims 4 to 11, characterized in that it has a plurality of scribing tools (05) which extend into the extension of the base body (02).
13. A method for the demolition of rock (08) by means of a demolition tool (01) according to one of Claims 1 to 12 with the following steps:

    - milling of at least two parallel slots (08) into the rock (09), wherein the slots (08) have a predetermined depth, a predetermined width and a predetermined distance away from each other;

    - creating a score running parallel to a bottom (15) of the slot (08) using the scribing tool (05) associated with the demolition tool (01) in a first wall section (14), starting from one of the slots (08) and not severing the wall section, wherein the first section of the wall (14) extends directly from the floor (15) of the slot (08); and

    - breaking off the rock (09) between the slots (08) by applying a compressive force during the creation of the score on a second wall section (17) of the slot (08), wherein the second wall section (17) extends from a beginning of the slot (08) that is opposite to the ground (15).
14. The method according to Claim 13, characterized in that the distance between the slots (08) and/or the depth and/or the width of the slots (08) are adjustable in order to vary the size of the broken rock pieces, and that the score is created thereby being at a depth of less than half the thickness of the wall section.
15. The method according to Claim 13 or 14, characterized in that the slots (08) are introduced vertically or horizontally into the rock (09).

Images