Rock mass crushing device

Abstract

The utility model discloses a rock mass crushing device which comprises a vehicle body, and a crushing hammer device, a water jet cutter device and two mechanical arms are carried on the vehicle body. A hammer head of a breaking hammer device is installed at the movable end of one mechanical arm, and a nozzle of a water jet cutter device is installed at the movable end of the other mechanical arm. Through cooperative operation of the breaking hammer device and the water jet cutter device, a dual-action mechanism of physical impact breaking and water jet cutting can be realized. After the hammer head primarily crushes a rock mass, the water jet cutter device can immediately cool and secondarily cut a crushed surface, water flow ejected from the nozzle can erode the surface of the rock mass and enter the rock mass, expansion and development of micro-cracks in the rock mass are accelerated, a water wedge effect is formed, generation of crack grids is promoted, and the crack formation rate is increased. Therefore, the internal temperature of the rock mass can be effectively reduced, energy accumulation in the rock mass caused by too high temperature is avoided, and the rock burst triggering condition is fundamentally inhibited.

Description

Technical Field

[0001] This utility model mainly relates to the field of engineering machinery technology, and in particular to a rock crushing device. Background Technology

[0002] Rockburst is a sudden fracturing and bursting phenomenon in rock mass caused by the sudden release of underground pressure or the rapid redistribution of internal stress. It is one of the major safety hazards faced by deep mines. Rockbursts are common in deep underground engineering projects, such as tunnel excavation and mining, especially in hard rock areas. High ground stress and strong disturbances during excavation can easily trigger rockbursts, posing significant dangers and challenges to construction and personnel safety. In high-stress hard rock environments, the reaction of the rock mass after blasting is difficult to predict, making blasting unsuitable for mining operations.

[0003] For rock masses prone to rockbursts, existing technologies typically employ mechanical cutting to break up the rock. However, traditional mechanical cutters can easily cause localized overheating of the rock mass during the cutting process. When the energy inside the rock mass accumulates to a certain level, it can easily trigger a rockburst, potentially leading to a safety accident.

[0004] For the reasons mentioned above, it is necessary to design a rock breaking device with relatively stronger safety. Utility Model Content

[0005] The technical problem this invention aims to solve is how to reduce the probability of rockbursts and improve the safety of rock breaking devices.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A rock breaking device includes a vehicle body on which a hydraulic breaker, a water jet device, and two robotic arms are mounted. One robotic arm has a hammer head mounted on its movable end, and the other robotic arm has a nozzle mounted on its movable end. Through the coordinated operation of the hydraulic breaker and the water jet device, a dual mechanism of physical impact breaking and water jet cutting can be achieved. After the hammer head initially breaks the rock mass, the water jet device immediately cools and performs secondary cutting on the broken surface. The water jet from the nozzle erodes the surface of the rock mass and penetrates into the rock mass, accelerating the expansion and development of micro-fractures within the rock, forming a water wedge effect, and promoting the generation of a fracture network. This effectively reduces the internal temperature of the rock mass, preventing energy accumulation due to excessive temperature and fundamentally suppressing the triggering conditions for rockbursts. The independent operation design of the two robotic arms allows the two devices to be used together or independently, adapting to the breaking requirements of different rock hardnesses.

[0008] As a further improvement to the above technical solution:

[0009] The water jet device also includes a water pump and a water tank fixed on the vehicle body, and the nozzle is connected to the water pump and the water pump is connected to the water tank via water pipes.

[0010] The water pump and water tank provide a stable supply of high-pressure water to the waterjet unit, ensuring that the nozzles can continuously output high-pressure water for cutting and cooling. Connecting the water pump to the power source via a power supply line guarantees the energy supply to the waterjet unit during long-term operation, preventing a decrease in cutting and cooling efficiency due to insufficient or interrupted water pressure.

[0011] The water jet device generates a water pressure range of 270MPa-280MPa. By precisely controlling the pressure parameters of the high-pressure water jet, it can ensure effective cutting and cooling of the rock mass while avoiding sudden stress changes within the rock mass caused by excessive pressure. Experiments show that this pressure range allows the water to simultaneously penetrate into the micro-fractures of the rock mass during cutting, releasing potential stress in advance through the "water wedge effect" and reducing the probability of rock bursts.

[0012] The water jet device generates water with a temperature range of 28℃-46℃. By controlling this temperature range, excessively high local temperatures in the rock mass can be effectively avoided. The low-temperature water jet removes heat from the rock surface during cutting, preventing energy accumulation within the rock mass and significantly reducing the likelihood of rock bursts, thus further enhancing operational safety.

[0013] The robotic arm comprises a first arm segment, a second arm segment, and a third arm segment connected in sequence. One end of the first arm segment is vertically hinged to the vehicle body. The second arm segment is telescopically fitted onto the other end of the first arm segment. The third arm segment is laterally hinged to the end of the second arm segment opposite to the first arm segment. A hammer or nozzle is mounted on the end of the third arm segment opposite to the second arm segment. This three-stage linkage robotic arm structure achieves precise six-degree-of-freedom positioning, allowing the hammer and nozzle to flexibly adjust their working angle and distance to adapt to the rock breaking needs of different shapes and locations. This avoids localized over-breaking or cooling blind spots caused by limited robotic arm movement, ensuring that the breaker hammer and water jet device can accurately act on the target area.

[0014] The rock breaking device also includes a power source for powering the hydraulic breaker and water jet device. The power source is fixed to the vehicle body and connected to the hydraulic breaker and water jet device respectively via power supply lines. The power source can be a battery. This integrated power source design ensures a stable and continuous power output for both the hydraulic breaker and water jet device, avoiding problems such as decreased breaking efficiency or untimely cooling due to power fluctuations. It also ensures the synchronization and reliability of their coordinated operation, effectively controlling energy input and heat generation during rock breaking and preventing abnormal temperature accumulation in the rock mass caused by unstable equipment operation.

[0015] The rock breaking device also includes a semi-enclosed protective shell fixed to the vehicle body. This shell encloses at least one of the following: the breaker hammer, the water jet device, the robotic arm, and the power source. The semi-enclosed protective shell provides physical protection for the core operating components, reducing impact damage to the equipment from flying rock fragments or debris during the breaking process. It also prevents malfunctions in the breaking or cooling functions due to equipment failure, thereby preventing uneven rock breaking and temperature control imbalances caused by abnormal equipment operation. This reduces the risk of rockbursts from a structural safety perspective and provides a relatively stable working environment for the equipment, indirectly improving temperature control performance.

[0016] The rock crushing device also includes a chute for guiding the crushed rock to the center of the vehicle's bottom. The upper end of the chute is located directly below the hammer, and the lower end is located in the center of the vehicle's bottom. The chute design concentrates the crushed rock at the center of the vehicle's bottom, facilitating subsequent transportation or cleanup. This structure prevents the crushed rock from scattering in the surrounding area, reducing cleanup difficulty, and minimizing the impact on vehicle movement caused by debris accumulating in the wheel or track areas.

[0017] The rock breaking device also includes a sensor for collecting rock temperature. This sensor is located on the front of the vehicle body, directly facing the working area of ​​the hammer, and is connected to an external host unit. The temperature sensor can monitor the rock temperature in the hammer's working area in real time, transmitting the temperature data to the external host unit via signal connection. This enables dynamic tracking of rock temperature changes during the breaking process, providing direct data support for determining the energy accumulation state within the rock mass. This allows operators or the control system to promptly detect abnormal temperature increases and take preventative measures such as adjusting cooling intensity or suspending operations, thus preventing rockburst accidents from a monitoring and early warning perspective.

[0018] The rock breaking device also includes an alarm that issues warning signals based on rock mass temperature. The alarm is mounted on the vehicle body and connected to an external host unit. The alarm is linked to a temperature sensor; when the rock mass temperature reaches a preset threshold, it immediately issues an alarm signal, alerting on-site personnel or the remote control system to the risk of energy accumulation in the rock mass. This facilitates rapid response and targeted measures (such as increasing water jet cooling flow or adjusting the operating frequency of the rock breaker), intervening before the energy inside the rock mass accumulates to a critical state that could trigger a rockburst. This transforms passive protection into proactive early warning, significantly improving the device's safety in high-risk environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the rock mass breaking device;

[0020] Figure 2 This is a cross-sectional schematic diagram of a rock breaking device.

[0021] The labels in the diagram represent: 1. Vehicle body; 2. Hydraulic breaker device; 21. Hammer head; 3. Water jet device; 31. Nozzle; 4. Robotic arm; 41. First arm segment; 42. Second arm segment; 43. Third arm segment; 5. Protective shell; 6. Slide. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The rock breaking device described in this embodiment is mainly used for safe breaking operations in high-stress hard rock environments, and is especially suitable for deep mines or tunnel projects where rock bursts are prone to occur.

[0024] like Figure 1 and Figure 2 As shown, the rock breaking device includes a vehicle body 1, with a tracked walking mechanism at the bottom for autonomous movement. The vehicle body 1 is equipped with a hydraulic breaker 2, a water jet device 3, and two identical robotic arms 4. The two robotic arms 4 are symmetrically arranged on both sides of the front of the vehicle body 1. The movable end of one robotic arm 4 is fitted with the hammer head 21 of the hydraulic breaker 2, and the movable end of the other robotic arm 4 is fitted with the nozzle 31 of the water jet device 3.

[0025] The water jet device 3 further includes a water pump and a water tank fixed to the rear of the vehicle body 1. The water tank is connected to the water pump inlet via a water pipe, and the water pump outlet is connected to the nozzle 31 via a high-pressure hose. The water pump is motor-driven and can boost the water pressure to 270-280 MPa to meet the cutting requirements of rocks of different hardness. In actual operation, by adjusting the diameter of the nozzle 31 and the water pressure parameters, the cutting depth of the water jet can be precisely controlled, thereby avoiding over-digging or under-digging.

[0026] The robotic arm 4 is composed of a first arm segment 41, a second arm segment 42, and a third arm segment 43 connected sequentially. One end of the first arm segment 41 is connected to the vehicle body 1 via a vertical hinge shaft, allowing for vertical swinging. The second arm segment 42 is mounted on the other end of the first arm segment 41 and extends and retracts via a hydraulic cylinder. The third arm segment 43 is connected to the second arm segment 42 via a horizontal hinge shaft, allowing for horizontal swinging. A hammer head 21 or a nozzle 31 is installed at the end of the third arm segment 43. Through the coordinated action of multiple joints, the crushing or cutting angle can be flexibly adjusted. For example, the hammer head 21 of the hydraulic breaker device 2 can impact the rock surface in multiple directions, while the nozzle 31 of the water jet device 3 can move precisely along a preset cutting path.

[0027] The top of the vehicle body 1 is equipped with a semi-enclosed protective shell 5, which is made of arc-shaped explosion-proof steel plate and houses the hydraulic breaker 2, water jet device 3, robotic arm 4, and power source. The front of the protective shell 5 is open to allow the hydraulic breaker 2 and water jet device 3 to extend out for operation.

[0028] A chute 6 is installed on the vehicle body 1 directly below the hammer 21. The upper opening of the chute 6 receives the crushed rock fragments, and the lower end extends to the middle of the bottom of the vehicle body 1. The rock fragments are concentrated and guided to the collection area through the chute 6 to avoid accumulating in the track area and affecting the movement of the vehicle.

[0029] An infrared temperature sensor is also installed on the front of the vehicle body 1, with its probe facing the working area of ​​the hammer head 21, for real-time monitoring of the rock surface temperature. The sensor is connected to the control host inside the vehicle body 1. When an abnormal temperature rise is detected (exceeding a preset threshold), the control host triggers an alarm to issue an audible and visual alarm, prompting the operator to stop work and evacuate the danger zone.

[0030] It should be noted that the hydraulic breaker device 2, water jet device 3, sensor, and alarm are all commercially available products, and their structure, connection method, and working principle are existing technologies, which will not be elaborated here.

[0031] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A rock breaking device, comprising a vehicle body (1), characterized in that: The vehicle body (1) is equipped with a rock breaker device (2), a water jet device (3) and two robotic arms (4); the movable end of one of the robotic arms (4) is equipped with the hammer head (21) of the rock breaker device (2), and the movable end of the other robotic arm (4) is equipped with the nozzle (31) of the water jet device (3); the rock breaking device also includes a chute (6) for guiding the broken rock to the middle position of the bottom of the vehicle body (1), the upper end of the chute (6) is located directly below the hammer head (21), and its lower end is located at the middle position of the bottom of the vehicle body (1).

2. The rock mass crushing device according to claim 1, characterized in that: The water jet device (3) also includes a water pump and a water tank fixed on the vehicle body (1), and the nozzle (31) is connected to the water pump and the water pump and the water tank via water pipes.

3. The rock mass crushing device according to claim 1, characterized in that: The robotic arm (4) includes a first arm segment (41), a second arm segment (42), and a third arm segment (43) connected in sequence. One end of the first arm segment (41) is vertically hinged to the vehicle body (1). The second arm segment (42) is telescopically fitted onto the other end of the first arm segment (41). The third arm segment (43) is horizontally hinged to the end of the second arm segment (42) away from the first arm segment (41). A hammer (21) or a nozzle (31) is installed on the end of the third arm segment (43) away from the second arm segment (42).

4. The rock mass crushing device according to claim 1, characterized in that: The rock breaking device also includes a power source for providing power to the breaker hammer device (2) and the water jet device (3). The power source is fixed on the vehicle body (1) and connected to the breaker hammer device (2) and the water jet device (3) respectively via power supply lines.

5. The rock mass crushing device according to claim 4, characterized in that: The rock breaking device also includes a semi-enclosed protective shell (5) fixed on the vehicle body (1), which encloses at least one of the following: the rock breaking hammer device (2), the water jet device (3), the robotic arm (4), and the power source.

6. The rock mass crushing device according to claim 1, characterized in that: The rock breaking device also includes a sensor for collecting rock temperature. The sensor is located on the front side of the vehicle body (1), facing the working area of ​​the hammer (21), and is connected to the external host signal.

7. The rock mass crushing device according to claim 1, characterized in that: The rock breaking device also includes an alarm for issuing an alarm signal based on the rock temperature. The alarm is mounted on the vehicle body (1) and is connected to an external host signal.

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