Coal mine coal face hard rock chiseling-splitting-mining integrated unit and method

Abstract

The invention discloses a coal mine coal face hard rock chiseling-splitting-mining integrated unit and method, and belongs to the technical field of mine safety production. The unit comprises a chiseling main body and a coal mining machine main body, wherein the chiseling main body comprises a punching device group and a splitting device group which are arranged in front of the coal mining machine main body side by side; a walking mechanism of the coal mining machine main body is connected with the chiseling main body through a driving connecting plate, and the chiseling main body is driven to horizontally move in a gear-pin rail manner, so that the coal mining machine main body cuts and crushes the rock after the punching device group and the splitting device group continuously punch and split the hard rock. Hydraulic pressure and power are provided by the shearer body. According to the method, the coal mining machine drives the chiseling and splitting platform to move and adjust the position, continuous circulation of punching, splitting, cutting, transporting and supporting is achieved, the hydraulic drilling static splitting technology and the fully-mechanized coal mining technology are combined, continuous and cooperative forcible entry of hard rocks on the coal mining working face of the coal mine is achieved, the safety production efficiency is remarkably improved, and the comprehensive cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of mine safety production technology, specifically relating to an integrated unit and method for drilling, splitting and mining hard rock in coal mining faces. Background Technology

[0002] Currently, coal production is mainly based on underground and open-pit mining, with underground mining accounting for over 90%. Underground coal mines generally employ fully mechanized mining technology (referred to as "fully mechanized mining"). This technology uses complete sets of mechanized equipment to achieve full mechanization of five major processes in the coal mining face: coal breaking, coal loading, coal transportation, support, and goaf treatment. Relying on hydraulic supports, double-drum coal mining machines, scraper conveyors, and other equipment operating in coordination, it provides important support for the safe and efficient production of coal in my country. However, due to complex geological conditions, coal seam mining often encounters geological structures such as faults, collapse columns, and folds. These structures are often accompanied by hard rock masses, making it difficult for the coal mining machine's cutting teeth to effectively cut hard rock. This not only severely restricts production efficiency but also easily leads to excessive wear of the cutting teeth, increasing maintenance costs.

[0003] Existing rock-breaking technologies, such as mechanical cutting, hydraulic fracturing, and explosive blasting, suffer from limitations including low efficiency, complex operation, high safety risks, and significant disturbance. Mechanical cutting relies on the cutting teeth on the coal mining machine drum to directly cut the rock, but the high compressive strength of hard rock leads to rapid wear of the cutting teeth, requiring frequent replacements that not only increase costs but also disrupt production continuity. Hydraulic fracturing uses high-pressure water injected into rock fissures to achieve fracturing, but it requires large amounts of water resources, and the high-pressure equipment is complex to operate in the strictly explosion-proof environment underground, easily leading to water hazard risks. While explosive blasting achieves significant fracturing effects, it generates strong vibrations, flyrock, dust, and toxic gases, damaging the working face support structure, increasing safety hazards such as gas explosions, and requiring ventilation and smoke removal after blasting, severely impacting operational efficiency. Given that coal mining faces are typically 100-300m long and 2-6m high, the length of hard rock in the advancing direction can reach several meters to tens of meters, making existing rock-breaking technologies unsuitable for large-scale continuous operations.

[0004] Hydraulic drilling and splitting technology is a non-explosive rock breaking method. Its core principle is to use hydraulic power to drive a splitter within a pre-formed hole, generating static expansion force. This causes tensile stress on the surrounding rock, which, due to its much lower tensile strength compared to compressive and shear strength, is more prone to fracturing, forming large-scale cracks and even loosening and collapsing. During drilling and splitting, the hydraulic pressure provides a static breaking process, offering advantages over mechanical cutting, blasting, and hydraulic rock breaking techniques, including less vibration, lower noise, easier operation, no harmful byproducts, and higher efficiency. However, directly applying conventional drilling and splitting devices to large-scale hard rock breaking in coal mining faces presents several significant challenges: First, large-scale splitting equipment cannot meet the stringent explosion-proof requirements underground; second, due to the spatial layout limitations of coal mining processes, installation and operation often require the dismantling of existing fully mechanized mining equipment, severely impacting production continuity. Furthermore, existing small-scale equipment has a low degree of automation and relies on manual handling and operation, which poses both personal safety risks and low operational efficiency, making it difficult to meet the high-efficiency demolition requirements of large-scale hard rock operations. It also cannot form a coordinated and continuous demolition operation process with the coal mining technology. When facing hard rock, existing fully mechanized mining equipment mainly relies on direct cutting by the coal mining machine, but this results in severe wear of the cutting teeth and low efficiency, and cannot achieve pre-weakening treatment of hard rock. Summary of the Invention

[0005] In view of this, the purpose of this invention is to solve the above problems and to propose an integrated unit and method for drilling, splitting and mining hard rock in coal mining faces.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An integrated rock chiseling-splitting-mining unit for hard rock in a coal mining face includes a chiseling and splitting main body and a coal mining machine main body. The chiseling and splitting main body includes a drilling device group and a splitting device group arranged side by side in front of the coal mining machine main body. The traveling mechanism of the coal mining machine main body is connected to the chiseling and splitting main body through a drive connecting plate. The traveling mechanism of the coal mining machine main body adopts a gear-pin rail type, which drives the chiseling and splitting main body to move horizontally. After the drilling device group and the splitting device group perform chiseling and splitting operations on the hard rock in front of the coal mining machine main body, the coal mining machine main body cuts and breaks the rock.

[0007] Furthermore, the splitting body also includes a splitting platform, which is connected to the drive connecting plate; the drilling device group and the splitting device group are disposed on the splitting platform, and the drilling device group is located between the splitting device group and the coal mining machine body; the drilling device group and the splitting device group move under the drive of the coal mining machine body to realize continuous drilling and splitting of hard rock.

[0008] Furthermore, the splitting platform is equipped with a horizontal moving drive mechanism and a horizontal traction platform. The drilling device group and the splitting device group are respectively mounted on a horizontal traction platform. The horizontal traction platform is slidably mounted on the splitting platform. The horizontal moving drive mechanism is connected to the horizontal traction platform and drives the drilling device group and the splitting device to move horizontally on the splitting platform to adapt to the formation of a free surface in the hard rock area.

[0009] Furthermore, the horizontal movement drive mechanism includes a drive motor and a ball screw, which simultaneously drive the two horizontal traction platforms to move through the cooperation of the drive motor and the ball screw.

[0010] Furthermore, each of the horizontal traction platforms is equipped with a lifting platform, and the drilling device group and the splitting device group are respectively located on the lifting platform. The height of the drilling device group and the splitting device group can be adjusted through the lifting platform to meet the needs of hard rock demolition at different heights.

[0011] Furthermore, the lifting platform includes four hydraulic supports, and the height of the drilling device group and the splitting device group can be adjusted by extending and retracting the hydraulic supports.

[0012] Furthermore, the lifting platform is provided with multiple compartments from top to bottom, the drilling device group includes multiple drilling mechanisms, and the splitting device group includes multiple splitting mechanisms. Each compartment is provided with a corresponding drilling mechanism or splitting mechanism, forming multiple units operating simultaneously along the vertical direction to achieve demolition covering the height of the coal mining face.

[0013] Furthermore, the drilling mechanism includes a rotary mechanism, a drill rod, a guide rail, and a drive motor. The drive motor drives a slider connected to the rotary mechanism to move the drill rod back and forth, and the rotary mechanism drives the drill rod to rotate to complete the drilling.

[0014] Furthermore, the splitting mechanism includes a drive motor, a slider, a hydraulic cylinder, and a splitting head. The drive motor drives the slider connected to the hydraulic cylinder to move back and forth, and hydraulic oil is injected into the hydraulic cylinder to expand the splitting head, thereby achieving borehole splitting.

[0015] Furthermore, the hydraulic and electrical power for the drilling device assembly and the splitting device assembly is provided by the main body of the coal mining machine.

[0016] Furthermore, the main body of the coal mining machine includes a drum, cutting teeth, rocker arm, baffle and scraper conveyor. The height position of the drum is adjusted by the rocker arm. The rotation of the drum drives the cutting teeth to cut loose rocks. The cut rocks fall to the scraper conveyor for transportation. The baffle prevents rocks from falling onto the main body of the coal mining machine.

[0017] A method for integrated drilling, splitting, and mining in hard rock at a coal mining face, employing the integrated drilling, splitting, and mining unit as described above, includes the following steps: The main body of the coal mining machine moves the splitting platform to the side of the hard rock area and adjusts its horizontal position to form a free face; the drilling device group drills holes simultaneously to form multiple holes. After the drilled hole is formed, the main body of the coal mining machine continues to move horizontally, so that the splitting head of the splitting device group is aligned with the drilled hole. The splitting head is put into the drilled hole by the drive motor, and hydraulic oil is injected to complete the splitting, thereby realizing the development and crushing of rock fissures. After splitting, the main body of the coal mining machine moves to the splitting area and cuts the loose rock with the rollers and cutting teeth. At the same time, the drilling device group moves to the new position to continue drilling. After cutting is completed, the rock falls onto a scraper conveyor for transport, and the hydraulic support moves with the scraper conveyor to provide support.

[0018] Furthermore, by adjusting the horizontal traction platform and the lifting platform, the horizontal and vertical adaptability to hard rock under different working conditions can be achieved, thus expanding the demolition range.

[0019] The beneficial effects of this invention are as follows: This invention integrates hydraulic drilling static fracturing technology with fully mechanized mining technology to achieve continuous and coordinated fracturing of hard rock in coal mining faces, significantly improving safety and production efficiency while reducing overall costs. The drilling fracturing technology belongs to the category of hydraulic static fracturing technology. Based on the low tensile strength of rock, this technology applies static expansion force to the borehole to achieve safe and efficient rock fracturing, effectively overcoming the problems of severe wear and low efficiency associated with mechanical cutting of hard rock. The fracturing process is free of explosive vibrations, does not damage the working face support facilities, and does not produce flying rocks, dust, or toxic gases. The operational safety boundary is small, posing minimal threat to workers and the surrounding environment. This technology is simple to operate, has lower requirements for operating conditions compared to hydraulic rock breaking technologies, and the process is simple and reliable.

[0020] This invention, based on the continuous operation of fully mechanized mining, designs a chisel-splitting platform that moves with the coal mining machine. This platform comprises a drilling device group and a splitting device group, with multiple drilling and splitting devices operating simultaneously. These devices can cover the entire coal face height without interfering with each other, solving the problems of low efficiency of traditional small drilling and splitting devices and the difficulty of using large splitting devices on the coal face. This enables large-scale hard rock breaking and demolition in coal mining. The designed chisel-splitting platform can form a continuous process with the coal mining machine. The drilling device group drills holes, the splitting device splits the holes, and the coal mining machine cuts the split rock mass, allowing for reuse of the coal mining machine and reducing wear on the cutting teeth.

[0021] This invention is adapted to fully mechanized mining technology, enabling continuous operations of hard rock breaking, splitting, cutting, transporting, supporting, and moving at the coal face, greatly improving the efficiency of hard rock breaking. The coal mining machine itself has sufficient electric and hydraulic power sources, which can directly provide the energy required for splitting operations, eliminating the need for additional independent hydraulic power systems and power supply devices, thereby further optimizing the equipment's spatial layout.

[0022] The present invention's splitting platform is designed with a horizontal moving platform for splitting devices. Each horizontal moving platform is designed with a hydraulic lifting platform, which can be adjusted in the horizontal direction and height according to different working conditions. Each splitting device on the lifting platform has a forward and backward movement adjustment function, which can realize demolition under different working conditions.

[0023] This invention overcomes the limitations of existing rock-breaking technologies, such as high safety risks and significant disturbances. It achieves rock fracturing through static expansion force, reducing the impact of vibration on support and improving the safety of underground operations. Simultaneously, the design of multiple devices operating simultaneously significantly improves breaking efficiency, adapting to the needs of large-scale hard rock operations in coal mining faces, reducing manual intervention, and lowering personal safety risks. The entire unit is seamlessly integrated with existing fully mechanized mining equipment, requiring no dismantling of existing equipment, maintaining production continuity, optimizing spatial layout, and being suitable for confined underground environments. By fully utilizing the power of the coal mining machine, it reduces additional costs and achieves an economical and efficient hard rock treatment path.

[0024] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the integrated rock drilling-splitting-mining unit for coal mining faces in this embodiment.

[0026] Figure 2 This is a perspective view of the integrated rock drilling-splitting-mining unit for coal mining faces in this embodiment.

[0027] Figure 3 This is a top view of the chisel-splitting body in this embodiment.

[0028] Figure 4 This is a side view of the chisel-split body in this embodiment.

[0029] Figure 5 This is a schematic diagram of the drilling mechanism in this embodiment.

[0030] Figure 6 This is a schematic diagram of the splitting mechanism in this embodiment.

[0031] Figure 7 This is a three-dimensional view of the main body of the chisel in this embodiment.

[0032] Reference numerals: 1-rocker arm; 2-roller; 3-traveling mechanism; 4-baffle; 5-drive connecting plate; 6-splitting platform; 7-lifting platform; 8-drilling device assembly; 9-splitting device assembly; 10-horizontal traction platform of splitting device assembly; 11-horizontal traction platform of drilling device assembly; 12-horizontal movement drive motor; 13-ball screw; 14-hydraulic support. Detailed Implementation

[0033] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] Example 1 like Figures 1-7As shown, this is an integrated rock chiseling-splitting-mining unit for hard rock in a coal mining face. It includes a chiseling and splitting main body and a coal mining machine main body. The chiseling and splitting main body includes a drilling device group 8 and a splitting device group 9 arranged side by side in front of the coal mining machine main body. The traveling mechanism 3 of the coal mining machine main body is connected to the chiseling and splitting main body through a drive connecting plate 5. The traveling mechanism 3 of the coal mining machine main body adopts a gear-pin rail type, which drives the chiseling and splitting main body to move in the horizontal direction. After the drilling device group 8 and the splitting device group 9 perform chiseling and splitting operations on the hard rock in front of the coal mining machine main body, the coal mining machine main body cuts and breaks the rock.

[0037] The splitting body also includes a splitting platform 6, which is connected to a drive connecting plate 5; a drilling device group 8 and a splitting device group 9 are installed on the splitting platform 6, and the drilling device group 8 is located between the splitting device group 9 and the main body of the coal mining machine; the drilling device group 8 and the splitting device group 9 move under the drive of the main body of the coal mining machine to realize continuous drilling and splitting of hard rock.

[0038] The splitting platform 6 is equipped with a horizontal movement drive mechanism and a horizontal traction platform. The drilling device group 8 and the splitting device group 9 are respectively mounted on the horizontal traction platform 11 of the drilling device group and the horizontal traction platform 12 of the splitting device group. The horizontal traction platforms 11 and 12 of the drilling device group and the splitting device group are slidably mounted on the splitting platform 6. The horizontal movement drive mechanism is connected to the horizontal traction platforms 11 and 12 of the drilling device group and the splitting device group, driving the drilling device group 8 and the splitting device to move horizontally on the splitting platform 6 to adapt to the formation of a free face in the hard rock area. The horizontal movement drive mechanism includes a horizontal movement drive motor 12 and a ball screw 13, which simultaneously drive the two horizontal traction platforms to move through the cooperation of the horizontal movement drive motor 12 and the ball screw 13.

[0039] Both the horizontal traction platform 11 of the drilling device group and the horizontal traction platform 12 of the splitting device group are equipped with lifting platforms 7. The drilling device group 8 and the splitting device group 9 are respectively located on the lifting platforms 7. The height of the drilling device group 8 and the splitting device group 9 can be adjusted through the lifting platforms 7 to meet the needs of hard rock demolition at different heights. The lifting platform 7 includes four hydraulic supports 14. The height position of the drilling device group 8 and the splitting device group 9 can be adjusted by extending and retracting the hydraulic supports 14. The lifting platform 7 is arranged with multiple compartments from top to bottom. The drilling device group 8 includes multiple drilling mechanisms, and the splitting device group 9 includes multiple splitting mechanisms. Each compartment is equipped with one drilling mechanism or one splitting mechanism, forming multiple units operating simultaneously in the vertical direction to achieve demolition covering the height of the coal mining face.

[0040] The drilling mechanism includes a rotary mechanism, a drill rod, a guide rail, and a drive motor. The drive motor drives a slider connected to the rotary mechanism to move the drill rod back and forth. The rotary mechanism drives the drill rod to rotate, completing the drilling. The splitting mechanism includes a drive motor, a slider, a hydraulic cylinder, and a splitting head. The drive motor drives a slider connected to the hydraulic cylinder to move back and forth. Hydraulic oil is injected into the hydraulic cylinder to expand the splitting head, thus splitting the drilled hole. The hydraulic and electrical power for the drilling device group 8 and the splitting device group 9 is provided by the main body of the coal mining machine.

[0041] The main body of the coal mining machine includes a drum 2, cutting teeth, rocker arm 1, baffle 4 and scraper conveyor. The height position of the drum 2 is adjusted by the rocker arm 1. The rotation of the drum 2 drives the cutting teeth to cut loose rocks. The cut rocks fall to the scraper conveyor for transportation. The baffle 4 prevents rocks from falling onto the main body of the coal mining machine.

[0042] When used in underground coal mining faces, this unit is suitable for coal mining faces with a length of 100-300m and a height of 2-6m, where the length of the hard rock in the advancing direction is several meters to tens of meters. The drilling device group 8 and the splitting device group 9 operate simultaneously through the hydraulic and electric power provided by the main body of the coal mining machine, realizing a continuous cycle of drilling, splitting, cutting, transportation, and support. The entire process does not require an additional power supply, and is automatically adjusted only by the hydraulic and electric power of the main body of the coal mining machine, which facilitates stable operation in complex underground environments.

[0043] Example 2 This embodiment is a method based on the integrated rock drilling-splitting-mining unit in coal mining face of embodiment 1. The method specifically includes the following steps: When the unit is started at the coal mining face in the underground coal mine, the walking mechanism 3 of the main body of the coal mining machine drives the splitting platform 6 to move to the side of the hard rock range through the drive connecting plate 5. The horizontal position is adjusted by the horizontal movement drive motor 12 and ball screw 13 to form a free face; the drilling device group 8 drills holes at the same time to form multiple drill holes.

[0044] After the borehole is formed, the main body of the coal mining machine continues to move horizontally, so that the splitting head of the splitting device group 9 is aligned with the borehole. The splitting head is put into the borehole by the drive motor, and hydraulic oil is injected to complete the splitting, thereby realizing the development and crushing of rock fissures.

[0045] After splitting, the main body of the coal mining machine moves to the splitting range and cuts the loose rock through the drum 2 and cutting teeth. At the same time, the drilling device group 8 moves to the new position to continue drilling.

[0046] After cutting is completed, the rock falls onto a scraper conveyor for transport. The hydraulic support moves with the scraper conveyor to provide support.

[0047] By adjusting the horizontal traction platform and the lifting platform 7, the horizontal and height of hard rock under different working conditions can be adapted to expand the demolition range. After completing the demolition of hard rock of one splitting head length, the main body of the chisel and the main body of the coal mining machine are moved to a new horizontal position and moved forward with the scraper conveyor to start a new round of hard rock demolition cycle.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An integrated drilling-splitting-mining unit for hard rock in coal mining faces, characterized in that, The system includes a splitting body and a coal mining machine body. The splitting body includes a drilling device group and a splitting device group arranged side by side in front of the coal mining machine body. The traveling mechanism of the coal mining machine body is connected to the splitting body through a drive connecting plate. The traveling mechanism of the coal mining machine body adopts a gear-pin rail type, which drives the splitting body to move in the horizontal direction. After the drilling device group and the splitting device group split the hard rock in front of the coal mining machine body, the coal mining machine body cuts and breaks the rock.

2. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 1, characterized in that, The splitting body also includes a splitting platform, which is connected to the drive connecting plate; the drilling device group and the splitting device group are located on the splitting platform, and the drilling device group is located between the splitting device group and the coal mining machine body; the drilling device group and the splitting device group move under the drive of the coal mining machine body to realize continuous drilling and splitting of hard rock.

3. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 2, characterized in that, The splitting platform is equipped with a horizontal moving drive mechanism and a horizontal traction platform. The drilling device group and the splitting device group are respectively located on a horizontal traction platform. The horizontal traction platform is slidably located on the splitting platform. The horizontal moving drive mechanism is connected to the horizontal traction platform and drives the drilling device group and the splitting device to move horizontally on the splitting platform to adapt to the formation of a free face in the hard rock area.

4. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 3, characterized in that, The horizontal movement drive mechanism includes a drive motor and a ball screw, which work together to drive two horizontal traction platforms to move simultaneously.

5. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 3, characterized in that, Each of the horizontal traction platforms is equipped with a lifting platform. The drilling device group and the splitting device group are respectively located on the lifting platform. The height of the drilling device group and the splitting device group can be adjusted through the lifting platform to meet the needs of hard rock demolition at different heights.

6. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 5, characterized in that, The lifting platform includes four hydraulic supports, and the height of the drilling device group and the splitting device group can be adjusted by extending and retracting the hydraulic supports.

7. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 5, characterized in that, The lifting platform has multiple compartments from top to bottom. The drilling device group includes multiple drilling mechanisms, and the splitting device group includes multiple splitting mechanisms. Each compartment is equipped with a corresponding drilling mechanism or splitting mechanism, forming multiple units operating simultaneously along the vertical direction to achieve demolition covering the height of the coal mining face.

8. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 7, characterized in that, The drilling mechanism includes a rotary mechanism, a drill rod, a guide rail, and a drive motor. The drive motor drives a slider connected to the rotary mechanism to move the drill rod back and forth. The rotary mechanism drives the drill rod to rotate to complete the drilling.

9. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 7, characterized in that, The splitting mechanism includes a drive motor, a slider, a hydraulic cylinder, and a splitting head. The drive motor drives the slider connected to the hydraulic cylinder to move back and forth. Hydraulic oil is injected into the hydraulic cylinder to expand the splitting head, thereby splitting the drilled hole.

10. The integrated rock drilling-splitting-mining unit for hard rock coal mining faces according to claim 1, characterized in that, The hydraulic and electrical power for the drilling device assembly and the splitting device assembly is supplied by the main body of the coal mining machine.

11. The integrated rock drilling-splitting-mining unit for coal mining faces according to claim 1, characterized in that, The main body of the coal mining machine includes a drum, cutting teeth, rocker arm, baffle and scraper conveyor. The height of the drum is adjusted by the rocker arm. The rotation of the drum drives the cutting teeth to cut loose rocks. The cut rocks fall to the scraper conveyor for transportation. The baffle prevents rocks from falling onto the main body of the coal mining machine.

12. An integrated method for drilling, splitting, and mining hard rock in a coal mining face, characterized in that, The method of using the integrated drilling-splitting-mining unit as described in any one of claims 1 to 11 includes the following steps: The main body of the coal mining machine moves the splitting platform to the side of the hard rock area and adjusts its horizontal position to form a free face; the drilling device group drills holes simultaneously to form multiple holes. After the drilled hole is formed, the main body of the coal mining machine continues to move horizontally, so that the splitting head of the splitting device group is aligned with the drilled hole. The splitting head is put into the drilled hole by the drive motor, and hydraulic oil is injected to complete the splitting, thereby realizing the development and crushing of rock fissures. After splitting, the main body of the coal mining machine moves to the splitting area and cuts the loose rock with the rollers and cutting teeth. At the same time, the drilling device group moves to the new position to continue drilling. After cutting is completed, the rock falls onto a scraper conveyor for transport, and the hydraulic support moves with the scraper conveyor to provide support.

13. The integrated method for drilling, splitting, and mining hard rock in a coal mining face according to claim 12, characterized in that, By adjusting the horizontal traction platform and the lifting platform, the horizontal and vertical adaptability to hard rock under different working conditions can be achieved, thus expanding the demolition range.

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