Flexible air bag interval charging device in blast hole based on intelligent rock stratum self-adaption

Abstract

The utility model relates to a flexible air bag interval charging device in a blast hole based on intelligent rock stratum self-adaption, and belongs to the technical field of mine blasting. Comprising a flexible air bag body, a sensor module, a control unit and a pneumatic execution system, and the control unit is electrically connected with the pneumatic execution system and used for controlling the inflation and deflation states of the air bag according to signals of the sensor module. By means of sensing-decision-execution closed-loop control, the problem that traditional fixed interval explosive loading cannot adapt to complex rock stratums is solved, damage of blasting to slopes is remarkably reduced, and blasting efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of mine blasting technology, especially to a blast hole in-hole flexible air bag interval charging device based on intelligent rock stratum self adaptation. BACKGROUND

[0002] In open pit blasting operation, the traditional fixed interval charging mode cannot be dynamically adjusted according to the change of rock stratum, resulting in unsatisfactory blasting effect, and even possible damage to the slope stability. In the prior art, although there are some interval charging devices, they have single function and cannot realize intelligent rock stratum sensing and dynamic adjustment, which is difficult to meet the blasting demand under complex geological conditions.

[0003] Therefore, an interval charging device based on intelligent rock stratum self adaptation is urgently needed to improve the blasting effect and reduce the damage to the slope. UTILITY MODEL CONTENT

[0004] The utility model provides a blast hole in-hole flexible air bag interval charging device based on intelligent rock stratum self adaptation adopts the following technical scheme: comprising:

[0005] The flexible air bag body is made of high-elastic rubber material and has a built-in multi-layer folding structure, and the length adjustment range is 0.5-3.0 m;

[0006] The sensor module contains a thin film pressure sensor, a hardness detection probe and an air pressure sensor, the thin film pressure sensor is uniformly distributed on the outer surface of the flexible air bag body, the hardness detection probe is arranged at one end of the flexible air bag body, and the air pressure sensor is located inside the flexible air bag body;

[0007] The control unit is built-in embedded chip and is electrically connected with the sensor module;

[0008] The pneumatic execution system includes a micro air pump and a solenoid valve, the micro air pump is connected with the solenoid valve, and the pneumatic execution system is communicated with the flexible air bag body;

[0009] The control unit is electrically connected with the pneumatic execution system and is used for controlling the inflation and deflation state of the flexible air bag body according to the signal of the sensor module.

[0010] Further, the high-elastic rubber material of the flexible air bag body is nitrile rubber.

[0011] Further, the hardness detection probe includes a micro pressure head, the micro pressure head is perpendicular to the blast hole wall and is in contact with the rock mass surface.

[0012] Further, the thin film pressure sensor is uniformly arranged in 4-8 along the circumferential direction of the flexible air bag body.

[0013] Further, the embedded chip in the control unit is ARM Cortex-M4.

[0014] Further, the flexible air bag body adopts a multi-layer tear-resistant structure.

[0015] Further, the sensor module and the control unit are connected through a wired cable.

[0016] Further, an air filtering device is arranged at the inlet of the micro air pump.

[0017] Further, the micro air pump has a single charging and discharging energy consumption ≤5W·h, and supports solar cell power supply.

[0018] Further, the thin film pressure sensor is externally covered with a flexible protective layer.

[0019] In summary, the utility model has the following beneficial technical effects:

[0020] 1. The thin film pressure sensor, hardness detection probe and air pressure sensor in the sensor module collect rock hardness, hole wall lateral pressure and air bag internal air pressure data in real time, the control unit analyzes the rock state based on the dynamic algorithm of the embedded chip, and drives the pneumatic execution system to adjust the charging and discharging amount of the flexible air bag body, so that the real-time dynamic adjustment of the charging interval is realized, the blasting energy distribution is optimized, the explosive energy utilization rate is improved, and the misfire rate is reduced.

[0021] 2. The thin film pressure sensor is uniformly distributed along the cylindrical outer surface of the flexible air bag body, forming a full circumferential pressure monitoring network, and combining with the multi-dimensional data analysis of the control unit, the balance of the contact pressure of the air bag and the hole wall is ensured, local stress concentration is avoided, and the precision and reliability of the charging interval adjustment under complex rock conditions are significantly improved.

[0022] 3. The flexible air bag body is made of nitrile rubber material, and combines a multi-layer tear-resistant folding structure design, which can still maintain structural integrity under the working condition of blasting shock wave pressure ≤100MPa, effectively resist the scratching and impact wave repeated action of rock fragments, and prolong the service life of the device.

[0023] 4. The pneumatic execution system cooperates with the micro air pump and the electromagnetic valve, and the response time is ≤50ms, which can quickly adjust the air bag inflation amount during the blasting stress wave propagation process, offset the influence of dynamic rock pressure change on the charging interval, and realize millimeter-level interval precision control.

[0024] 5. The variable buffer isolation belt is formed by the intelligent expansion and contraction of the flexible air bag body, and is suitable for the heterogeneous rock mass such as soft and hard interbed, fault interlayer, etc., can adaptively adjust the shock wave transmission path, disperse the direct force of the explosion energy on the hole wall, reduce the crack propagation risk of the slope rock mass, and improve the slope stability. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of the utility model;

[0026] Figure 2 is a sensor module schematic diagram of the utility model;

[0027] Figure 3 is a sensor module schematic diagram of the utility model;

[0028] Figure 4 is a pneumatic execution system schematic diagram of the utility model;

[0029] Figure 5 is a charge structure diagram of the utility model not unfolded in the blast hole;

[0030] Figure 6 is a charge structure diagram of the utility model after unfolding.

[0031] The figure mark explanation: 1, control unit;2, propellant column;3, cable;4, flexible air bag body;5, sensor module;6, pneumatic execution system;7, blast hole plug;51, thin film pressure sensor;52, hardness detection probe;53, air pressure sensor;61, micro air pump;62, electromagnetic valve;63, air filter device. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail in combination with the drawings.

[0033] As Figures 1-4 shown in a specific embodiment of a blast hole flexible air bag interval charge device based on intelligent rock stratum self-adaption, including: flexible air bag body 4, adopt high elasticity rubber material to make, built-in multilayer folding structure, length adjustment range is 0.5-3.0m;

[0034] Sensor module 5 includes thin film pressure sensor 51, hardness detection probe 52 and air pressure sensor 53, the thin film pressure sensor 51 is evenly distributed on the outer surface of flexible air bag body 4, and the range of thin film pressure sensor 51 is 0-60Mpa, which is used to monitor the lateral pressure of the hole wall surrounding rock in real time;The hardness detection probe 52 is arranged at one end of the flexible air bag body 4, and is used to measure the rebound hardness of the rock mass;The air pressure sensor is located inside the flexible air bag body 4, and is used to detect the internal air pressure of the flexible air bag body 4;

[0035] The control unit 1 is electrically connected with the sensor module 5, receives the signal of the sensor module 5 and outputs control instructions.

[0036] Specifically, the embedded chip in the control unit 1 is ARM Cortex-M4.

[0037] The pneumatic execution system 6 includes a micro air pump 61 and a solenoid valve 62, and the response time is less than or equal to 50 ms. The micro air pump 61 is connected with the solenoid valve 62, and the pneumatic execution system 6 is in communication with the flexible air bag body 4, and is used for adjusting the inflation and deflation state of the air bag according to the instruction of the control unit.

[0038] The control unit 1 is electrically connected with the pneumatic execution system 6, and is used for controlling the inflation and deflation state of the air bag according to the signal of the sensor module 5.

[0039] Specifically, in use, first, the flexible air bag body 4 is lowered with the charge column to a predetermined position in the blast hole. The sensor module 5 measures the hardness of the rock mass through the hardness detection probe 52. If the hardness is less than or equal to 30 MPa (soft interlayer), the control unit 1 triggers the inflation instruction, the pneumatic execution system 6 inflates the flexible air bag body 4, and the length of the flexible air bag body 4 is expanded from 0.5 m to 3.0 m to form a buffer isolation zone. If the hardness is greater than or equal to 80 MPa (hard rock), the control unit 1 triggers the deflation instruction, and the flexible air bag body 4 is contracted to 0.5 m to concentrate the blasting energy. During the blasting process, the diaphragm type pressure sensor 51 continuously monitors the impact of the explosion stress wave on the hole wall. If the detected stress peak value exceeds 50 MPa, the control unit 1 immediately inflates again to further extend the interval to attenuate the energy.

[0040] Specifically, when the flexible air bag body 4 is automatically extended, the control logic is as follows:

[0041] Rock stratum state sensing: after the drilling is completed, the flexible air bag body 4 module is lowered with the charge column to a predetermined position, the hardness detection probe 52 obtains hardness data, and if the hardness is less than or equal to 30 MPa (soft interlayer), the inflation instruction is triggered; if the hardness is greater than or equal to 80 MPa (hard rock), the deflation instruction is triggered to shorten the interval; at the same time, the diaphragm type pressure sensor 51 measures the lateral pressure of the hole wall to verify the integrity of the rock stratum;

[0042] Inflation mode (extend interval): the control unit 1 sends an instruction to the micro air pump 61, injects compressed gas with a pressure of 0.5-1.0 MPa, the flexible air bag body 4 folds the layers to expand, and the air pressure sensor 53 monitors the air pressure value in the air bag. When the preset threshold value is reached, the inflation is stopped.

[0043] Deflation mode (shorten interval): the solenoid valve 62 is opened, and the air bag is contracted under the external rock pressure.

[0044] Dynamic feedback adjustment: during the blasting process, the diaphragm pressure sensor 51 monitors the impact of the blasting stress wave on the hole wall. If the stress peak value exceeds the threshold value (such as 50MPa), secondary inflation is immediately performed; if the rock mass suddenly collapses the hole (the pressure drops to near 0MPa), emergency deflation is performed.

[0045] In other preferred embodiments, the high-elasticity rubber material of the flexible airbag body 4 is nitrile rubber.

[0046] In other preferred embodiments, the hardness detection probe 52 includes a micro indenter that is perpendicular to the blast hole wall and in contact with the rock mass surface.

[0047] Specifically, the hardness detection probe 52 is located at one end of the flexible airbag body 4, and the micro indenter protrudes from the surface of the flexible airbag body 4. The micro indenter is perpendicular to the blast hole wall and maintains appropriate contact with the blast hole wall. The rock mass rebound hardness is measured by the micro indenter, and the travel of the micro indenter into the rock mass surface during measurement is 5-10mm.

[0048] In other preferred embodiments, the diaphragm pressure sensor 51 is uniformly arranged in a circumferential direction of the outer surface of the flexible airbag body 4, and there are 4-8 diaphragm pressure sensors, which ensure omnidirectional monitoring of the contact pressure between the airbag and the blast hole wall.

[0049] In other preferred embodiments, the flexible airbag body 4 adopts a multi-layer anti-tear structure and can withstand a blasting shock wave pressure of ≤100MPa.

[0050] In other preferred embodiments, the sensor module 5 and the control unit 1 are connected through a wired cable 3.

[0051] In other preferred embodiments, the micro air pump 61 is provided with an air filtering device 63 at the inlet thereof. The micro air pump 61 can directly extract gas from the air, inject the gas into the airbag after removing dust and moisture through the air filtering device 63, or be externally connected to a gas source through a pipeline.

[0052] In other preferred embodiments, the energy consumption of the micro air pump 61 during a single inflation and deflation process is ≤5W·h, and the micro air pump 61 is powered by a solar cell.

[0053] In other preferred embodiments, the diaphragm pressure sensor 51 is externally covered with a flexible protective layer to prevent mechanical damage to the diaphragm pressure sensor 51 during the inflation and deflation process of the airbag.

[0054] As shown in Figure 5 the charging structure diagram of the flexible airbag body 4 in the blast hole, the flexible airbag body 4 is in an uninflated state, the length is about 0.5m, the cartridge 2 is placed in a spaced manner with the airbag body 1, the sensor module 5 and the control unit 1 are located at both ends of the airbag body 1, and the pneumatic execution system 6 is in a standby state.

[0055] As Figure 6 shown in the charging structure diagram after unfolding, the flexible air bag body 4 has been inflated and expanded, the length reaches 3.0m, forms a buffer isolation belt, the interval between the propellant column 2 increases, the sensor module 5 and the control unit 1 continuously monitor the rock stratum state, and the pneumatic execution system 6 keeps the stable inflation state of the air bag.

[0056] The utility model discloses through intelligent rock stratum perception and dynamic adjustment, has realized the accurate control of charging interval, is applicable to the blasting operation under the complex geological condition, has remarkable engineering practicality and innovativeness.

[0057] The above are preferable embodiments of the utility model, and not limit the protection scope of the utility model accordingly, so: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A flexible gasbag interval charging device based on intelligent rock bed self-adaptation, characterized in that, The utility model relates to a flexible airbag body (4) is made of high elasticity rubber material, and multiple layer folding structure is built-in, and length adjustment range is 0.5-3.0m; Sensor module (5) contains film type pressure sensor (51), hardness detection probe (52) and air pressure sensor (53), the film type pressure sensor (51) is evenly distributed in the outer surface of flexible airbag body (4);Hardness detection probe (52) is arranged in one end of flexible airbag body (4);Air pressure sensor (53) is located in the inside of flexible airbag body (4); Control unit (1) is built-in embedded chip, and is electrically connected with sensor module (5); Pneumatic execution system (6) includes micro air pump (61) and electromagnetic valve (62), the micro air pump (61) is connected with electromagnetic valve (62), and the pneumatic execution system (6) is communicated with flexible airbag body (4); Wherein, the control unit (1) is electrically connected with pneumatic execution system (6), is used for controlling the inflation and deflation state of flexible airbag body (4) according to the signal of sensor module (5). The high elasticity rubber material of the flexible airbag body (4) is nitrile rubber.

2. The intelligent formation adaptive based borehole in-hole flexible airbag spacer charge device of claim 1, wherein The hardness detection probe (52) includes a micro pressure head that is perpendicular to the borehole wall and in contact with the rock surface.

3. The intelligent formation adaptive based borehole in-hole flexible airbag spacer charge device of claim 1, wherein, The film type pressure sensor (51) is evenly arranged in 4-8 along the circumferential direction of the flexible airbag body (4).

4. The intelligent formation adaptive based borehole in-hole flexible airbag spacer charge device of claim 1, wherein, The embedded chip in the control unit (1) is an ARM Cortex-M4.

5. The intelligent formation adaptive based borehole in-hole flexible airbag spacer charge device of claim 1, wherein, The flexible airbag body (4) adopts a multi-layer tear-resistant structure.

6. The intelligent formation adaptive based borehole in-hole flexible airbag spacer charge device of claim 1, wherein, The sensor module (5) and the control unit (1) are connected by a wired cable (3).

7. The intelligent formation adaptive based borehole in-hole flexible bung spacer charge device of claim 1, wherein, The micro air pump (61) is provided with an air filter device (63) at the inlet.

8. The intelligent formation adaptive based borehole in-hole flexible airbag spacer charge device of claim 1, wherein, The micro air pump (61) has an energy consumption of less than or equal to 5W·h for single inflation and deflation, and is powered by a solar cell.

9. The intelligent formation adaptive based borehole in-hole flexible bung spacer charge device of claim 1, wherein, The film type pressure sensor (51) is covered with a flexible protective layer.

10. The intelligent formation adaptive based borehole in-hole flexible airbag spacer charge device of claim 1, wherein, ​

Images