Coal seam gas pressure underground rapid measuring device and method

Abstract

The invention provides a coal seam gas pressure underground rapid measuring device and method, and relates to the technical field of coal mine gas control. A first connector is arranged at the open end of a flexible bag; the one-way valve is arranged in the flexible bag, and an air inlet of the one-way valve is communicated with the outside of the flexible bag; the pressure sensor is arranged on the inner wall of the flexible bag; the sealing rod is used for plugging a drill hole; a second interface is formed in the inner end of the sealing rod; one end of the support rod is connected with the inner end of the sealing rod; the supporting rod extends into the flexible bag from the first connector, and the first connector is connected with the second connector. And the data acquisition and transmission unit is in signal connection with the pressure sensor through a signal cable and is used for acquiring and transmitting the pressure data uploaded by the pressure sensor. According to the device and the method, the measurement process is convenient to operate, the coal seam gas pressure can be rapidly and accurately measured in an underground field, the test result is traceable, the measurement device can be used repeatedly, and the test efficiency and precision are far higher than those of a traditional sampling analysis test.

Description

Technical Field

[0001] This invention relates to the field of coal mine gas control technology, specifically to a rapid underground measurement device and method for coal seam gas pressure. Background Technology

[0002] Coal mine gas disasters are one of the five major hazards in coal mines, and they have long plagued the safe production of major coal mining enterprises. Gas disaster management is the most important safety control work in mines. During coal mining, gas exceedances and gas accumulation occur frequently, and in some mines, gas explosions even occur. Gas problems in mines constantly threaten the lives of workers. Therefore, researchers are increasing their efforts in the prevention and control of coal mine gas disasters to ensure the safe and stable development of coal mining enterprises.

[0003] Coal seam gas pressure is a crucial parameter for assessing the risk of gas hazards in coal mines. Currently, the determination of coal mine gas pressure mainly relies on traditional sampling and analysis methods. These methods typically require lengthy waiting times and complex operational procedures, failing to meet the need for rapid data acquisition and impacting mine safety management and production efficiency. Therefore, it is essential to develop a technology capable of rapidly and accurately determining coal seam gas pressure. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid underground measurement device and method for coal seam gas pressure, so as to quickly and accurately measure coal seam gas pressure in the underground field.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A rapid downhole measurement device for coal seam gas pressure includes: A flexible bag is configured as a bag-shaped structure and made of flexible material, with a first interface at the open end of the flexible bag; A one-way valve is located inside the flexible bag, and the air inlet of the one-way valve is connected to the outside of the flexible bag. A pressure sensor is installed on the inner wall of the flexible bag; A sealing rod is used to seal drill holes, and a second interface is provided at the inner end of the sealing rod; A support rod, one end of which is connected to the inner end of a sealing rod; The support rod extends into the interior of the flexible bag from the first interface, and the first interface is connected to the second interface. The data acquisition and transmission unit is connected to the pressure sensor via a signal cable and is used to acquire and transmit the pressure data uploaded by the pressure sensor.

[0006] Furthermore, the pressure sensor is configured as a plurality of sensors, which are arranged at intervals on the inner wall of the flexible bag.

[0007] Furthermore, the signal cable is located inside the support rod.

[0008] Furthermore, the support rods are configured as multiple rods, with adjacent support rods connected end to end, and the last support rod connected to the inner end of the sealing rod.

[0009] Furthermore, the signal cable on the first support rod is connected to the pressure sensor; A support rod has a first signal connector and a second signal connector at both ends, and the two ends of a signal cable are connected to the first signal connector and the second signal connector, respectively. The two adjacent support rods are connected by a first signal connector and a second signal connector. The inner end of the sealing rod is provided with a third signal connector, which is connected to the data acquisition and transmission unit via a signal cable; The second and third signal connectors of the last support rod are connected.

[0010] Furthermore, the data acquisition and transmission unit includes a controller, a storage module, and a data transmission module. The controller is connected to the pressure sensor, the storage module, and the data transmission module via signal cables. The pressure sensor uploads pressure data to the controller and stores it in the storage module. The data transmission module is used to transmit the pressure data to the data receiving terminal.

[0011] Furthermore, the data acquisition and transmission unit is located inside the sealing rod.

[0012] A rapid downhole measurement method for coal seam gas pressure, using the aforementioned rapid downhole measurement device for coal seam gas pressure, comprises the following steps: S1. Drilling boreholes in coal seams for gas pressure measurement; S2. Insert the first support rod into the interior of the flexible bag from the first interface. The first support rod pulls the flexible bag into the drill hole. Then connect the subsequent support rods in sequence and insert them into the interior of the flexible bag. Each subsequent support rod pulls the flexible bag into the drill hole in turn. The last support rod is connected to the inner end of the sealing rod, and the first interface is connected to the second interface. At the opening of the drill hole, seal the circumferential sidewall of the sealing rod with sealing material or a sealing device. S3. Gas from the borehole enters the flexible bag through the inlet of the one-way valve. The pressure sensor on the inner wall of the flexible bag senses the gas pressure, and the data acquisition and transmission unit collects and transmits the pressure data to the data receiving terminal.

[0013] The beneficial technical effects of this invention are: The coal seam gas pressure rapid underground measurement device and method of the present invention are convenient to operate, can quickly and accurately measure coal seam gas pressure on the ground, the test results are traceable, the measuring device can be used multiple times, and the testing efficiency and accuracy are far higher than traditional sampling and analysis tests. Attached Figure Description

[0014] Figure 1 This is a partial structural diagram of the rapid underground coal seam gas pressure measuring device according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a partial structural diagram of the rapid underground coal seam gas pressure measuring device according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the field application of the rapid underground coal seam gas pressure measuring device according to an embodiment of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. Certain embodiments of the invention will be described more fully below with reference to the accompanying drawings, and some, but not all, of these embodiments will be shown. In fact, various embodiments of the invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to enable the invention to meet applicable legal requirements.

[0016] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In this embodiment of the invention, a rapid downhole measurement device and method for coal seam gas pressure are provided. Please refer to [link / reference]. Figures 1 to 3 As shown.

[0018] A rapid downhole measurement device for coal seam gas pressure includes a flexible bag 1, a one-way valve 2, a pressure sensor 3, a sealing rod 4, a support rod 5, and a data acquisition and transmission unit 6.

[0019] The flexible bag 1 is a bag-shaped structure made of flexible material with a certain strength and is airtight. The open end of the flexible bag 1 is provided with a first interface 11.

[0020] One-way valve 2 is located at the end inside the flexible bag 1, and the air inlet of one-way valve 2 is connected to the outside of the flexible bag 1. Gas outside the flexible bag 1 can enter the flexible bag 1 through one-way valve 2, but gas inside the flexible bag 1 cannot escape through one-way valve 2.

[0021] Pressure sensors 3 are disposed on the inner wall of the flexible bag 1. Multiple pressure sensors 3 are arranged at intervals on the inner wall of the flexible bag 1. Gas pressure is sensed by multiple pressure sensors 3, and mutual calibration is performed between the pressure sensors 3 to avoid test errors caused by the failure of a single pressure sensor 3.

[0022] Placing the pressure sensor 3 inside the flexible bag 1 can prevent external interference and achieve accurate sensing of gas pressure.

[0023] The sealing rod 4 is a cylindrical structure. The sealing rod 4 is used to seal the opening of the drill hole 7. The inner end of the sealing rod 4 is provided with a second interface 41.

[0024] One end of the support rod 5 is connected to the inner end of the sealing rod 4. The support rod 5 extends into the interior of the flexible bag 1 from the first interface 11 and supports the flexible bag 1. The first interface 11 is connected to the second interface 41.

[0025] The data acquisition and transmission unit 6 is connected to the pressure sensor 3 via the signal cable 8, and is used to acquire and transmit the pressure data uploaded by the pressure sensor 3.

[0026] The signal cable 8 is located inside the support rod 5 and the sealing rod 4 to protect the signal cable 8 and prevent it from being exposed and damaged by impacts inside the drill hole 7.

[0027] The support rod 5 is configured as multiple rods. Two adjacent support rods 5 are connected end to end by a snap or thread, and the last support rod 5 is connected to the inner end of the sealing rod 4 by a snap or thread.

[0028] One end of the signal cable 8 passing through the inside of the first support rod 5 is connected to the pressure sensor 3; the two ends of the support rod 5 are respectively provided with a first signal connector and a second signal connector, and the two ends of the signal cable 8 are respectively connected to the first signal connector and the second signal connector; the two adjacent support rods 5 are connected by the first signal connector and the second signal connector; the inner end of the sealing rod 4 is provided with a third signal connector, and the third signal connector is connected to the data acquisition and transmission unit 6 via the signal cable 8; the second signal connector and the third signal connector of the last support rod 5 are connected by signal.

[0029] Thus, a signal cable 8 is installed inside each support rod 5 and the sealing rod 4. During the assembly and connection between the support rods 5 and between the support rod 5 and the sealing rod, signal connection is achieved between the data acquisition and transmission unit 6 and the pressure sensor 3 through the signal connection between the first signal connector and the second signal connector, and between the second signal connector and the third signal connector.

[0030] The data acquisition and transmission unit 6 is located inside the sealing rod 4 to protect the data acquisition and transmission unit 6.

[0031] The data acquisition and transmission unit 6 includes a controller 61, a storage module 62, and a data transmission module 63. The controller 61 is connected to the pressure sensor 3, the storage module 62, and the data transmission module 63 via signal cables. The pressure sensor 3 uploads pressure data to the controller 61 and stores it in the storage module 62. The data transmission module 63 transmits the pressure data to the data receiving terminal. Specifically, the data transmission module 63 is a Bluetooth wireless transmission module, and the data receiving terminal is an explosion-proof smartphone. The data transmission module 63 communicates with the explosion-proof smartphone via Bluetooth to transmit the pressure data.

[0032] The sealing rod 4 also houses a battery 60, which powers the data acquisition and transmission unit 6 and the pressure sensor 3.

[0033] A rapid downhole method for measuring coal seam gas pressure, using the rapid downhole measurement device for coal seam gas pressure described in this embodiment, comprises the following steps: S1. Drilling borehole 7 in the coal seam for gas pressure measurement.

[0034] S2. Insert the first support rod 5 into the interior of the flexible bag 1 through the first interface 11. The first support rod 5 drives the flexible bag 1 to extend into the drill hole 7. Then connect the subsequent support rods 5 in sequence and insert them into the interior of the flexible bag 1. Each subsequent support rod 5 drives the flexible bag 1 to extend into the drill hole 7. The last support rod 5 is connected to the inner end of the sealing rod 4. Connect the first interface 11 to the second interface 41. At the opening of the drill hole 7, seal the circumferential sidewall of the sealing rod 4 with the sealing material 9 or the sealing device.

[0035] S3. Gas from borehole 7 enters the flexible bag 1 through the inlet of one-way valve 2. The flexible bag 1 expands, and the pressure sensor 3 on the inner wall of the flexible bag 1 senses the gas pressure. The data acquisition and transmission unit 6 collects and transmits the pressure data to the data receiving terminal. When the adsorption and desorption of gas in the coal seam surrounding borehole 7 reaches equilibrium, the gas pressure sensed by the pressure sensor 3 in the flexible bag 1 reaches its maximum, and the flexible bag 1 no longer deforms. The pressure at this time is the coal seam gas pressure.

[0036] The present invention has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the rapid underground coal seam gas pressure measurement device and method of the present invention. The rapid underground coal seam gas pressure measurement device and method of the present invention is convenient to operate, can quickly and accurately measure coal seam gas pressure on-site underground, the test results are traceable, the measuring device can be used multiple times, and the testing efficiency and accuracy are far higher than those of traditional sampling and analysis tests.

[0037] Of course, the specific embodiments described above further illustrate the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rapid downhole measuring device for coal seam gas pressure, characterized in that, include: A flexible bag is configured as a bag-shaped structure and made of flexible material, with a first interface at the open end of the flexible bag; A one-way valve is located inside the flexible bag, and the air inlet of the one-way valve is connected to the outside of the flexible bag. A pressure sensor is installed on the inner wall of the flexible bag; A sealing rod is used to seal drill holes, and a second interface is provided at the inner end of the sealing rod; A support rod, one end of which is connected to the inner end of a sealing rod; The support rod extends into the interior of the flexible bag from the first interface, and the first interface is connected to the second interface. The data acquisition and transmission unit is connected to the pressure sensor via a signal cable and is used to acquire and transmit the pressure data uploaded by the pressure sensor.

2. The rapid underground coal seam gas pressure measuring device according to claim 1, characterized in that: The pressure sensors are configured as multiple sensors, which are arranged at intervals on the inner wall of the flexible bag.

3. The rapid underground coal seam gas pressure measuring device according to claim 1, characterized in that: The signal cable is located inside the support rod.

4. A rapid underground coal seam gas pressure measuring device according to claim 1 or 3, characterized in that: The support rods are configured as multiple rods, with adjacent support rods connected end to end, and the last support rod connected to the inner end of the sealing rod.

5. The rapid downhole measurement device for coal seam gas pressure according to claim 4, characterized in that: The signal cable on the first support rod is connected to the pressure sensor; A support rod has a first signal connector and a second signal connector at both ends, and the two ends of a signal cable are connected to the first signal connector and the second signal connector, respectively. The two adjacent support rods are connected by a first signal connector and a second signal connector. The inner end of the sealing rod is provided with a third signal connector, which is connected to the data acquisition and transmission unit via a signal cable; The second and third signal connectors of the last support rod are connected.

6. The rapid underground coal seam gas pressure measuring device according to claim 1, characterized in that: The data acquisition and transmission unit includes a controller, a storage module, and a data transmission module. The controller is connected to the pressure sensor, the storage module, and the data transmission module via signal cables. The pressure sensor uploads pressure data to the controller and stores it in the storage module. The data transmission module is used to transmit the pressure data to the data receiving terminal.

7. A rapid underground coal seam gas pressure measuring device according to claim 1 or 6, characterized in that: The data acquisition and transmission unit is located inside the sealing rod.

8. A method for rapid underground measurement of coal seam gas pressure, using the rapid underground measurement device for coal seam gas pressure as described in any one of claims 1 to 7, characterized in that, The method steps are as follows: S1. Drilling boreholes in coal seams for gas pressure measurement; S2. Insert the first support rod into the interior of the flexible bag from the first interface. The first support rod pulls the flexible bag into the drill hole. Then connect the subsequent support rods in sequence and insert them into the interior of the flexible bag. Each subsequent support rod pulls the flexible bag into the drill hole in turn. The last support rod is connected to the inner end of the sealing rod, and the first interface is connected to the second interface. At the opening of the drill hole, seal the circumferential sidewall of the sealing rod with sealing material or a sealing device. S3. Gas from the borehole enters the flexible bag through the inlet of the one-way valve. The pressure sensor on the inner wall of the flexible bag senses the gas pressure, and the data acquisition and transmission unit collects and transmits the pressure data to the data receiving terminal.

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