A control system for coal unloading by layer-penetrating drilling and hydraulic punching
By introducing pressure and flow sensors and processing modules into the punching system for automated control, the problem of relying on experience to determine punching results in existing technologies has been solved, enabling efficient and precise adjustment of punching parameters and optimization of construction.
Patent Information
- Application Number
- CN202521979742.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-15
AI Technical Summary
In existing technologies, the punching pressure and punching effect are judged based on experience, resulting in low extraction efficiency, low punching coal volume, and poor punching efficiency. Furthermore, it is impossible to achieve remote data transmission and real-time analysis, which affects construction safety and efficiency.
Pressure and flow sensors are used to monitor punching parameters, and the processing module controls the pressurization and shutdown of the water pump. Combined with the timing module, automated control is achieved to ensure precise adjustment of punching pressure, flow rate and time.
It enables continuous, real-time monitoring of drilling pressure and flow, improving monitoring accuracy and construction efficiency, reducing manual intervention, lowering construction costs, and optimizing drilling technology.
Smart Images
Figure CN224682564U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of punching coal unloading control, and in particular relates to a hydraulic punching coal unloading control system for through-layer drilling. Background Technology
[0002] During drilling, punching pressure is a critical parameter that directly affects drilling quality and construction safety. Traditional methods for monitoring punching pressure mainly rely on manual reading using mechanical pressure gauges, which has several limitations:
[0003] First, manual reading is inefficient and makes continuous monitoring difficult.
[0004] Second, mechanical pressure gauges have limited accuracy and cannot meet the needs of high-precision monitoring.
[0005] Third, in the harsh environment of coal mines, mechanical pressure gauges are prone to malfunction, affecting the reliability of monitoring results. Furthermore, traditional methods cannot achieve remote data transmission and real-time analysis, making it difficult to provide timely support for decision-making.
[0006] In a certain coal mine, the No. 2-2 mining area has no protective layer for mining and only the No. 3 coal seam is mined. In order to ensure safe production, the bottom plate through-layer drilling is used to pre-extract the gas from the coal seam in the section, and the hydraulic flushing pressure relief and permeability enhancement process is combined to enhance the extraction effect. The pressure, flow rate, time and other parameters of hydraulic flushing have a key impact on the extraction efficiency, the amount of coal punched, and the punching efficiency.
[0007] In existing technologies, the punching pressure and punching effect are judged by experience and human eye readings, which leads to problems such as low extraction efficiency, low punching coal volume, and poor punching efficiency. Utility Model Content
[0008] The purpose of this invention is to provide a hydraulic punching and coal unloading control system for through-layer drilling, in order to solve the problem that the punching pressure and punching effect in the existing technology rely on experience to judge, which leads to low extraction efficiency, small punched coal volume and poor punching efficiency.
[0009] This utility model adopts the following technical solution: a hydraulic flushing and coal unloading control system for cross-layer drilling, comprising:
[0010] A hydraulic perforating pipe, one end of which is connected to the drill rod inside the borehole, and the other end of which is connected to a water pump;
[0011] A pressure sensor, installed on the hydraulic perforation pipe, is used to detect the pressure in the hydraulic perforation pipe;
[0012] A flow sensor, installed on a hydraulically perforated pipe, is used to detect the flow rate inside the hydraulically perforated pipe;
[0013] The processing module contains preset pressure and flow rates; it receives the detected pressure from the pressure sensor and the detected flow rate from the flow sensor.
[0014] The processing module is used for:
[0015] When the detected pressure is less than the preset pressure value or the detected flow rate is less than the preset flow rate value, a booster signal is sent to the water pump, causing the water pump to increase the pressure and thus increase the pressure and flow rate of the hydraulic perforation pipe.
[0016] The beneficial effects of this utility model are:
[0017] This invention, by setting up a processing module, can send a booster signal to the water pump based on the pressure detected by the pressure sensor and the flow detected by the flow sensor, thereby increasing the pressure of the water pump and thus increasing the pressure and flow of the hydraulic perforated pipe.
[0018] This utility model can also receive the timing signal from the processing module and start timing by setting a timing module. When the time threshold is reached, a stop signal is sent to the water pump, thereby causing the water pump to stop working and complete the punching.
[0019] This invention can adjust the water pump pressure, thereby changing the punching pressure and flow rate. It can also automatically time and stop the water pump. Therefore, this invention can solve the problem that the punching pressure and punching effect in the prior art rely on experience to judge, which will result in low extraction efficiency, small amount of punched coal, and poor punching efficiency.
[0020] This invention enables continuous and real-time monitoring of punching pressure and flow rate, greatly improving monitoring efficiency; secondly, it has high monitoring accuracy, accurately capturing changes in pressure and flow rate; and it can control drilling and punching time.
[0021] This invention optimizes the drilling process, reduces the frequency of telephone reports during drilling operations, and also reduces the workload of personnel in the video monitoring room and on-site construction. It also reduces drilling costs, and is expected to save 340,000 yuan based on 10,000 boreholes per year. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model.
[0023] The components include: 10. Pressure sensor; 11. Flow sensor; 12. Processing module; 13. Timing module; and 14. Water pump. Detailed Implementation
[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0025] This utility model discloses a hydraulic flushing control system for coal unloading in cross-layer drilling, such as... Figure 1As shown, it includes: a hydraulic perforated pipe, a pressure sensor 10, a flow sensor 11, and a processing module 12.
[0026] One end of the hydraulic punching pipe is connected to the drill rod inside the borehole, and the other end of the hydraulic punching pipe is connected to the water pump 14; a pressure sensor 10 is installed on the hydraulic punching pipe and is used to detect the pressure of the hydraulic punching pipe; a flow sensor 11 is installed on the hydraulic punching pipe and is used to detect the flow rate inside the hydraulic punching pipe.
[0027] The processing module 12 is equipped with a pressure preset value and a flow preset value. The processing module 12 is used to receive the detected pressure from the pressure sensor 10 and the detected flow from the flow sensor 11. The processing module 12 is used to send a booster signal to the water pump 14 when the detected pressure is less than the pressure preset value or the detected flow is less than the flow preset value, so that the water pump 14 increases the pressure and thus increases the pressure and flow of the hydraulic perforation pipe.
[0028] The processing module 12 is also used to send a timing signal when the detected pressure is greater than or equal to the preset pressure value and the detected flow rate is greater than or equal to the preset flow rate value. Therefore, the present invention also includes a timing module 13, which is provided with a time threshold. The timing module 13 is used to receive the timing signal from the processing module 12 and start timing. When the time threshold is reached, it sends a stop signal to the water pump 14, thereby causing the water pump 14 to stop working and complete the punching.
[0029] The preset pressure value is 13 MPa. The preset flow rate value is 5 m³ / s. 3 / h. The time threshold is 15min.
[0030] Example
[0031] The drilling operation was carried out using a ZDY4500LP tracked fully hydraulic drilling rig for coal mines, with φ73mm drill rods and φ113mm drill bits.
[0032] The hydraulic drilling system uses a complete set of equipment with integrated drilling and reaming technology. It mainly consists of an integrated drilling and reaming drill bit, a high-pressure drill rod, a high-pressure rotary tailpipe, a high-pressure water pump (BQWL200 / 31.5-XQ200 / 10), a water storage tank, a high-pressure hose, and a high-pressure gate valve.
[0033] Operators adjust the perforation pressure and flow rate in a timely manner based on the data displayed on the underground control panel, while the surface equipment room monitors the perforation data in real time. Ventilation, dust control, and gas prevention technicians are assigned to the site to track the hydraulic perforation process, recording the perforation pressure, flow rate, perforation time, and amount of coal per meter of coal seam. Based on the coal seam firmness coefficient, equipment configuration, and actual site conditions in the 2-2 mining area of Xiayukou Coal Mine, observation points are set up in the 22306 intake roadway, middle roadway, and return roadway to ensure the reliability of the observation results. During the observation, the perforation pressure must not be less than 10 MPa, and the perforation flow rate must not be less than 5 m³ / h. 3 The punching time should be no less than 10 min / m, and the punching parameters should be continuously adjusted according to the punching situation on site.
[0034] From April 8th to 15th, 2025, a total of 7 boreholes were investigated and tested in the bottom plate roadways of the 22306 inlet, middle and return sections. Among them, there were 3 bottom plate roadways of the 22306 inlet, 1 bottom plate roadway of the 22306 middle section, and 3 bottom plate roadways of the 22306 return section. During the test of borehole No. 4-42-2 of the 22306 inlet, the investigation was not completed due to factors such as damage to the reamer and insufficient water pressure. The investigation of the remaining boreholes is shown in Table 1.
[0035] Table 1. On-site Inspection Report
[0036]
[0037]
[0038] During the on-site investigation, the punching pressure during drilling and punching of hole 8-1 was 12-15 MPa, and the punching flow rate was 3-4 m³ / h. 3 / h, average drilling time per meter of coal hole is 20 minutes, and coal output per meter of coal hole is 0.48m³. 3 When drilling 12-106-2, the punching pressure is 12-15 MPa and the punching flow rate is 3-4 m³ / h. 3 / h, average drilling time per meter of coal hole is 18 minutes, and coal output per meter of coal hole is 0.40m³. 3 When drilling 4-41-13, the punching pressure is 12-15 MPa and the punching flow rate is 2-3 m³ / h. 3 / h, average flushing time per meter of coal hole is 18 minutes, and coal output per meter of coal hole is 0.31m³. 3 The above three boreholes generally have low perforation flow rates, resulting in less coal output. Comparing boreholes 8-1 and 12-106-2, when the perforation pressure and flow rate are the same, the longer the perforation time, the more coal is extracted. Comparing boreholes 12-106-2 and 4-41-13, when the perforation pressure and time are the same, the higher the perforation flow rate, the more coal is extracted.
[0039] For drilling B2-6 and patching 8-11, the punching pressure, punching flow rate, and punching time are 13-15 MPa and 5-6 m, respectively. 3 The coal output per meter of coal hole was 1.0 m³ / h and 15 min, respectively. 3 1.1m 3 The drilling pressure, flow rate, and time for 4-86-5 drilling are 10-11 MPa and 6-7 m, respectively. 3 At 20 minutes and 1 hour, the coal seam in this area is soft, and the amount of coal ejected per meter of coal hole is 1.5 m³. 3 .
[0040] Analysis of on-site investigation data revealed that the first three groups of boreholes had lower coal yields due to insufficient water supply; the latter three groups of boreholes all produced coal yields greater than or equal to 1.0 m. 3 / m, meeting the requirement that the amount of coal ejected per meter of coal hole is not less than 0.7m. 3 Requirements.
[0041] Therefore, to ensure drilling efficiency and coal volume, and to achieve efficient and safe gas extraction, the drilling pressure for cross-layer drilling in mining area 2-2 should not be less than 13 MPa, and the drilling flow rate should not be less than 5 m³ / h. 3 / h, punching time not less than 15min.
[0042] This utility model can significantly reduce drilling construction costs, reduce costs and increase efficiency. The cost of this utility model is 40,000 yuan. Xiayukou Mine plans to drill 10,000 holes per year. On average, one mechanical pressure gauge is used for every 3 holes. The mechanical pressure gauge has a single unit price of 200 yuan. Therefore, 10,000 / 3*200-40,000*8=346,000 yuan. Thus, using this utility model can save 346,000 yuan per year.
[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hydraulic flushing control system for coal unloading in cross-layer drilling, characterized in that, include: A hydraulic perforating pipe, one end of which is connected to the drill rod inside the borehole, and the other end of which is connected to the water pump (14); A pressure sensor (10) is installed on the hydraulic perforation pipe to detect the pressure of the hydraulic perforation pipe; A flow sensor (11) is installed on the hydraulic perforated pipe to detect the flow rate inside the hydraulic perforated pipe; The processing module (12) has a pressure preset value and a flow preset value; it is used to receive the detected pressure from the pressure sensor (10) and the detected flow from the flow sensor (11). The processing module (12) is used for: When the detected pressure is less than the preset pressure value or the detected flow rate is less than the preset flow rate value, a booster signal is sent to the water pump (14) to increase the pressure of the water pump (14) and thus increase the pressure and flow rate of the hydraulic perforation pipe.
2. The hydraulic flushing and coal unloading control system for cross-layer drilling according to claim 1, characterized in that, The processing module (12) is also used for: When the detected pressure is greater than or equal to the preset pressure value and the detected flow rate is greater than or equal to the preset flow rate value, a timing signal is sent. Also includes: The timing module (13) is equipped with a time threshold, which is used to receive the timing signal from the processing module (12) and start timing. When the time threshold is reached, a pump stop signal is sent to the water pump (14), thereby causing the water pump (14) to stop working and complete the punching.
3. The hydraulic flushing and coal unloading control system for cross-layer drilling according to claim 1, characterized in that, The preset pressure value is 13 MPa.
4. A hydraulic flushing and coal unloading control system for cross-layer drilling according to claim 1, characterized in that, The preset flow rate is 5m. 3 / h.
5. A hydraulic flushing and coal unloading control system for cross-layer drilling according to claim 2, characterized in that, The time threshold is 15 minutes.