Auxiliary directional long drill hole gas extraction system

Abstract

The utility model relates to the technical field of gas extraction, in particular to an auxiliary directional long drill hole gas extraction system which comprises a processor electrically connected with a gas extraction pump and a sensor arranged on the whole hole section of a drill hole and electrically connected with the processor. The processor comprises a processor main board, and an abnormity judging unit, a distance measuring unit, a pressurizing unit and an early warning unit which are electrically connected with the processor main board respectively, and the sensor is electrically connected with the abnormity judging unit and the distance measuring unit respectively. According to the auxiliary directional long drill hole gas extraction system, the matching degree of gas extraction negative pressure and the depth of the long drill hole is improved, the problem of pressure loss of the middle and rear sections of the long drill hole is solved, the economic applicability of the auxiliary directional long drill hole gas extraction system is high, and the unfavorable conditions of high cost and low return are avoided.

Description

[Technical field]

[0001] The utility model relates to the technical field of gas extraction, in particular to an auxiliary directional long-hole gas extraction system. [Background technology]

[0002] Focusing on the coal field, with the consumption of surface or near-ground coal resources, people have to turn their attention to the mining of medium and deep coal resources. However, with the increase in mining depth, the gas content and gas pressure also increase, and the danger of coal seam outburst becomes more and more serious, so gas control is particularly important. Commonly used gas control measures include protective layer mining and pre-extraction of coal seam gas. When the conditions for mining the protective layer are not met, pre-extraction of coal seam gas becomes the main prevention and control measure; pre-extraction of coal seam gas mainly uses drilling along the layer or through the layer to extract gas. With the improvement of mine mining mechanization technology, the vigorous development of drilling rigs, drill rods and drilling technology, there are already drilling rigs that can drill more than 1000m, and the length of gas extraction boreholes has also increased. However, as the length of the borehole increases, it also brings many problems, among which solving the matching of drilling depth and extraction negative pressure has become a key link.

[0003] At present, the research results of scholars at home and abroad on mine gas extraction theory are mostly aimed at shallow boreholes of tens of meters, and basically do not consider the pressure drop problem in the middle and late stages of long boreholes. This is somewhat blind for the construction site of long boreholes, and it is impossible to control the pressure and gas concentration of gas extraction. The degree of intelligence is low, and manual control is required, and the safety of the entire mining process is difficult to ensure. [Contents of the utility model]

[0004] The purpose of the utility model is to provide an auxiliary directional long borehole gas extraction system, which improves the matching degree between the gas extraction negative pressure and the long borehole depth, solves the pressure loss problem in the middle and rear sections of the long borehole, has high economic applicability, and avoids the unfavorable situation of high cost and low return.

[0005] The present application is implemented through the following technical solutions: an auxiliary directional long-hole gas extraction system, including a processor electrically connected to the gas extraction pump, and a sensor installed in the entire borehole section and electrically connected to the processor, the processor including an abnormality judgment unit, a distance measurement unit, a boost unit and an early warning unit integrated with the processor mainboard, and the sensor is electrically connected to the abnormality judgment unit and the distance measurement unit respectively.

[0006] In the auxiliary directional long-hole gas extraction system as described above, the abnormality judgment unit, the distance measuring unit and the boosting unit are electrically connected in sequence, the early warning unit and the abnormality judgment unit are electrically connected to the processor mainboard respectively, the boosting unit is electrically connected to the boosting device, the sensor transmits the detection signal to the abnormality judgment unit, the abnormality judgment unit processes the detection signal and transmits the judgment signal to the distance measuring unit, the distance measuring unit responds to the judgment signal and sends a distance signal to the boosting unit, the boosting unit processes the distance signal and controls the boosting pump to perform boosting operations on the borehole.

[0007] In the auxiliary directional long-borehole gas extraction system as described above, the sensor is integrated with a pressure detection module and a gas concentration detection module.

[0008] In the auxiliary directional long-hole gas extraction system as described above, the pressure detection module is electrically connected to the abnormality judgment unit, the gas concentration detection module is electrically connected to the processor mainboard, the pressure detection module detects the drilling pressure and transmits the detection signal to the abnormality judgment unit, and the gas concentration detection module transmits the detected concentration signal to the processor mainboard.

[0009] In the auxiliary directional long-hole gas extraction system as described above, the boosting unit is electrically connected to the boosting device and the distance measuring unit respectively, the distance measuring unit judges the abnormal data sent back by the sensor and outputs a distance signal to the boosting unit, and the boosting unit analyzes the distance signal and outputs a control signal to the boosting device to control the boosting rate of the boosting device.

[0010] In the auxiliary directional long-hole gas extraction system as described above, the boosting unit includes a primary boosting module and a secondary boosting module. The primary boosting module is electrically connected to the distance measuring unit through the processor mainboard, and the secondary boosting unit is electrically connected to the sensor at the bottom of the borehole through the processor mainboard.

[0011] The auxiliary directional long-borehole gas extraction system as described above further includes an economic applicability judgment unit electrically connected to the processor mainboard.

[0012] In the auxiliary directional long-borehole gas extraction system as described above, the economic applicability unit is electrically connected to the gas concentration detection module and the gas extraction pump respectively through the processor mainboard.

[0013] Compared with the prior art, this application has the following advantages:

[0014] The utility model discloses an auxiliary directional long borehole gas extraction system, comprising a processor electrically connected to the gas extraction pump, and a sensor installed in the entire borehole section and electrically connected to the processor, the processor comprising an abnormality judgment unit, a distance measurement unit, a boost unit and an early warning unit integrated with the processor mainboard, and the sensor is electrically connected to the abnormality judgment unit and the distance measurement unit respectively, which improves the matching degree between the gas extraction negative pressure and the long borehole depth, solves the problem of pressure loss in the middle and rear sections of the long borehole, has high economic applicability, and avoids the unfavorable situation of high cost and low return.

Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a flow chart of the auxiliary directional long-hole gas extraction method according to an embodiment of the present application.

[0017] Figure 2 This is a schematic diagram of the auxiliary directional long-borehole gas extraction system of an embodiment of the present application. [Specific implementation method]

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] like Figure 1-2As shown, the embodiment of the present application proposes an auxiliary directional long borehole gas extraction system, including a processor 1 electrically connected to the gas extraction pump, and a sensor 2 installed in the full borehole section of the borehole and electrically connected to the processor 1, the processor 1 includes an abnormality judgment unit 12, a distance measurement unit 13, a boosting unit 14 and an early warning unit 15 connected to a processor main board 11, and integrated on the processor main body 11, the sensor 2 is electrically connected to the abnormality judgment unit 12 and the distance measurement unit 13, the abnormality judgment unit 12, the distance measurement unit 13 and the boosting unit 14 are electrically connected in sequence, the early warning unit 15 and the abnormality judgment unit 12 are electrically connected to the processor main board 11, the boosting unit 13 is electrically connected to the boosting unit 14, and the early warning unit 15 and the abnormality judgment unit 12 are electrically connected to the processor main board 11. 4 is electrically connected to the boosting device, the sensor 2 transmits the detection signal to the abnormality judgment unit 12, the abnormality judgment unit 12 processes the detection signal and transmits the judgment signal to the distance measurement unit 13, the distance measurement unit 13 responds to the judgment signal and sends a distance signal to the boosting unit 14, the boosting unit 14 processes the distance signal and controls the boosting pump to boost the borehole, through the abnormality judgment unit 12 and the distance measurement unit 13, the matching of the gas extraction negative pressure and the long borehole depth is ensured, to a certain extent, the pressure loss problem of the long borehole in the middle and rear sections is solved, and the added early warning unit 15 can help the supervision and management of the actual gas extraction work; the sensor 2 is integrated with A pressure detection module 21 and a gas concentration detection module 22, wherein the pressure detection module 21 is electrically connected to the abnormality judgment unit 12, and the gas concentration detection module 22 is electrically connected to the processor mainboard 11. The pressure detection module 21 detects the drilling pressure and transmits the detection signal to the abnormality judgment unit 12, and the gas concentration detection module 22 transmits the detected concentration signal to the processor mainboard 11; the boosting unit 14 is electrically connected to the boosting device and the distance measuring unit 13 respectively, and the distance measuring unit 13 judges the abnormal data sent back by the sensor 2 and outputs a distance signal to the boosting unit 14, and the boosting unit 14 analyzes the distance signal and outputs a control signal to the boosting device , to control the boosting rate of the boosting device, the boosting unit 14 includes a primary boosting module 141 and a secondary boosting module 142, the primary boosting module 141 is electrically connected to the distance measuring unit 13 through the processor motherboard 11, and the secondary boosting unit 142 is electrically connected to the sensor 2 at the bottom of the borehole through the processor motherboard 11, the full hole section should be divided into three equal parts according to the actual on-site drilling depth, namely the near section, the middle section and the far section, the primary boosting module 141 controls the gas extraction pump to boost the borehole according to the position of the sensor 2, wherein when the sensor closest to the borehole is located in the near section, the interval of 0.5KPa is used for boosting; when the sensor closest to the borehole is located in the middle section, the interval of 0.When the sensor closest to the borehole is located at the far end, the pressure is increased at an interval of 0.1KPa. When the gas extraction pump is increasing the pressure, the sensor 2 at the bottom of the borehole detects the pressure. The re-pressurization module 142 determines the re-pressurization rate according to the pressure data of the sensor 2 at the bottom of the borehole compared with the critical value and the zero scale value. When the negative pressure of the extraction changes from positive pressure to negative pressure, the pressure is stopped. Different pressurization schemes and multiple pressurization rate judgment units can ensure the accuracy of the pressurization results to a certain extent and avoid blindly increasing the pressure. The gas extraction system also includes an economic applicability judgment unit 16 electrically connected to the processor motherboard 11. The economic applicability unit 16 is electrically connected to the gas concentration detection module 22 and the gas extraction pump through the processor motherboard 11, which can ensure that all pressurization behaviors are within the economic capacity of the mine and avoid the unfavorable situation of high cost and low return. .

[0020] A gas extraction platform is constructed according to the coal seam geological data and occurrence conditions of the actual mine, and the sensors 2 are arranged in the entire borehole section and numbered in order from the bottom of the borehole to the borehole mouth. The abnormal conditions reported back by the sensors 2 are detected and judged by the abnormal judgment unit 12, wherein the abnormal conditions of the sensors 2 should be comprehensively judged according to the pressure size and the number of sensors. If the pressure of the sensors 2 starting from a certain sensor 2 and located thereafter are all positive pressures and gradually increase, it is considered that the abnormality is caused by the drilling depth; if only the pressure of individual sensors is abnormal, the work should be stopped and the system or equipment should be checked to see if it is normal. At the same time, the distance measurement unit 13 determines the sensor 2 closest to the borehole mouth according to the number of the sensor 2 and the spacing of each sensor 2, and judges its position in the entire borehole section, wherein the entire borehole section should be divided into three equal parts according to the actual on-site drilling depth. They are respectively the near section, the middle section and the far section. The initial pressurization module 141 controls the gas extraction pump to pressurize the borehole according to the position of the sensor 2. When the sensor closest to the borehole is located in the near section, the pressurization is performed at intervals of 0.5 KPa; when the sensor closest to the borehole is located in the middle section, the pressurization is performed at intervals of 0.3 KPa; when the sensor closest to the borehole is located in the far section, the pressurization is performed at intervals of 0.1 KPa. When the gas extraction pump is pressurizing, the sensor 2 at the bottom of the borehole detects the pressure. The secondary pressurization module 142 determines the rate of secondary pressurization based on the pressure data of the sensor 2 at the bottom of the borehole compared with the critical value and the zero scale value. When the extraction negative pressure changes from positive pressure to negative pressure, the pressurization is stopped. The economic applicability judgment unit 16 is configured to determine whether the pressurization is economical or not based on the comparison of the economic cost consumed by the adjusted gas extraction pump with the economic cost allocated by the mine plan.

[0021] An auxiliary directional long borehole gas extraction method, the method comprising the following steps:

[0022] Step S1: Assemble a gas extraction pump, an abnormality judgment unit, a distance measurement unit, a booster unit, an early warning unit, and an economic applicability judgment unit to construct a directional long-hole gas extraction platform, and install sensors in the entire borehole section and number them to obtain the extraction pressure and gas concentration of the entire borehole section;

[0023] Step S2: The abnormality determination unit determines whether the sensor in step S1 returns abnormal data;

[0024] If yes, proceed to step S3, otherwise proceed to step S8;

[0025] Step S3: The abnormality judgment unit judges whether the abnormality is caused by the mining depth according to the actual sensor situation of the abnormal data returned in step S2;

[0026] If yes, proceed to step S4; otherwise, the early warning unit sends an alarm signal to the terminal and performs maintenance. When the gas extraction platform resumes normal operation, return to step S1;

[0027] Step S4: Among the one or more sensors that transmit abnormal data in step S3, the distance measuring unit determines the abnormal sensor closest to the borehole opening and determines its location in the borehole, and the boosting unit boosts the pressure at a corresponding rate according to its location in the borehole, and monitors in real time whether the pressure at the bottom of the borehole is decreasing;

[0028] If yes, then go to step S5, otherwise the early warning unit sends an alarm signal to the terminal and performs maintenance, and when the gas extraction platform resumes normal operation, returns to step S1;

[0029] Step S5: The abnormality determination unit determines whether the pressure detected by the sensor at the bottom of the borehole is close to 1 KPa;

[0030] If yes, the boost rate is reduced and the process goes to step S6; otherwise, the boost rate is increased and the process goes back to step S4;

[0031] Step S6: the abnormality determination unit determines whether the pressure detected by the sensor at the bottom of the borehole is negative pressure;

[0032] If yes, then stop the pressurization and go to step S7, otherwise send a signal to the terminal to remind the technician to check;

[0033] Step S7: the economic applicability judgment unit judges whether the actual on-site gas extraction pump is within the economic operation threshold;

[0034] If yes, then go to step S8, otherwise the early warning unit sends an alarm signal to the terminal and resets the extraction plan;

[0035] Step S8: Normal operation.

[0036] The abnormal data in step S2 should be comprehensively judged based on the pressure and the number of sensors; in step S3, the steps to determine whether the abnormality is caused by the mining depth are as follows: Step S31: If the sensor pressure starting from a certain sensor and located at its position toward the bottom of the borehole is positive pressure and gradually increases, it is considered that the abnormality is caused by the drilling depth; otherwise, only the pressure of individual sensors is abnormal, then the gas extraction platform should be stopped and checked for normal operation; the position of the sensor in the full hole section in step S4 should be based on The on-site drilling depth is divided into three equal parts, namely the near section, the middle section and the far section; when the abnormal sensor is located in the near section, the pressure is increased at intervals of 0.5KPa; when the abnormal sensor is located in the middle section, the pressure is increased at intervals of 0.3KPa; when the abnormal sensor is located in the far section, the pressure is increased at intervals of 0.1KPa; the basis for determining the economic operation threshold of on-site gas extraction in step S7 includes: the cost consumed by the gas extraction pump during operation is within the range of the economic burden of the mineral, and the operating efficiency of the gas extraction pump is not less than 60%.

[0037] In summary, this application has but is not limited to the following beneficial effects:

[0038] The utility model provides an auxiliary directional long borehole gas extraction system, comprising a processor 1 electrically connected to the gas extraction pump, and a sensor 2 installed in the full borehole section of the borehole and electrically connected to the processor 1, the processor 1 comprising an abnormality judgment unit 12, a distance measurement unit 13, a booster unit 14 and an early warning unit 15 electrically connected to the processor mainboard 11, and respectively to the processor mainboard 11, the sensor 2 is electrically connected to the abnormality judgment unit 12 and the distance measurement unit 13, respectively, through the abnormality judgment unit 12 and the distance measurement unit 13, ensure that the gas extraction load The matching of the pressure and the depth of the long borehole can solve the problem of pressure loss in the middle and rear sections of the long borehole to a certain extent, and the added early warning unit 15 can help the supervision and management of the actual gas extraction work; the sensor 2 is integrated with a pressure detection module 21 and a gas concentration detection module 22; the boosting unit 14 includes a primary boosting module 141 and a secondary boosting module 142, the primary boosting module 141 is electrically connected to the distance measuring unit 13 through the processor motherboard 11, and the secondary boosting unit 142 is electrically connected to the sensor at the bottom of the borehole through the processor motherboard 11 2 electrical connection, the whole hole section should be divided into three equal parts according to the actual drilling depth, namely the near section, the middle section and the far section. The initial pressurization module 141 controls the gas extraction pump to pressurize the borehole according to the position of the sensor 2. When the sensor closest to the borehole is in the near section, the pressurization is performed at intervals of 0.5 KPa; when the sensor closest to the borehole is in the middle section, the pressurization is performed at intervals of 0.3 KPa; when the sensor closest to the borehole is in the far section, the pressurization is performed at intervals of 0.1 KPa. When the gas extraction pump is pressurizing, the sensor at the bottom of the borehole is pressed. The sensor 2 detects the pressure, and the re-pressurization module 142 determines the re-pressurization rate based on the pressure data of the sensor 2 at the bottom of the borehole compared with the critical value and the zero scale value. When the extraction negative pressure changes from positive pressure to negative pressure, the pressurization is stopped. Different pressurization schemes and multiple pressurization rate judgment units can ensure the accuracy of the pressurization results to a certain extent and avoid blindly increasing the pressure. The gas extraction system also includes an economic applicability judgment unit 16 electrically connected to the processor motherboard 11, which can ensure that all pressurization behaviors are within the economic capacity of the mine and avoid the unfavorable situation of high cost and low return.

[0039] It should be understood that the terms "first", "second", etc. are used in this application to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0040] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of this application is not limited to these descriptions. Any similarity or similarity with the method, structure, etc. of this application, or some technical deductions or replacements made based on the concept of this application should be considered as the protection scope of this application.

Claims

1. An auxiliary directional long borehole gas extraction system, characterized in that: The invention comprises a processor (1) electrically connected to a gas extraction pump, and a sensor (2) installed in a full borehole section and electrically connected to the processor (1); the processor (1) comprises an abnormality judgment unit (12), a distance measurement unit (13), a pressure boosting unit (14) and an early warning unit (15) connected to a processor mainboard (11) and integrated on the processor mainboard (11); the sensor (2) is electrically connected to the abnormality judgment unit (12) and the distance measurement unit (13), respectively; a pressure detection module (21) and a gas concentration detection module (22) are integrated on the sensor (2); the abnormality judgment unit (12), the distance measurement unit (13) and the pressure boosting unit (14) are electrically connected in sequence; the early warning unit (15) and the abnormality judgment unit (12) are electrically connected to the processor mainboard (11), respectively; the pressure boosting unit (14) The sensor (2) is electrically connected to the boosting device, transmitting a detection signal to the abnormality judgment unit (12), the abnormality judgment unit (12) processes the detection signal and transmits the judgment signal to the distance measurement unit (13), the distance measurement unit (13) responds to the judgment signal and sends a distance signal to the boosting unit (14), and the boosting unit (14) processes the distance signal and controls the boosting pump to perform a boosting operation on the borehole; The pressure detection module (21) is electrically connected to the abnormality judgment unit (12), and the gas concentration detection module (22) is electrically connected to the processor mainboard (11). The pressure detection module (21) detects the drilling pressure and transmits the detection signal to the abnormality judgment unit (12), and the gas concentration detection module (22) transmits the detected concentration signal to the processor mainboard (11); The boost unit (14) is electrically connected to the boost device and the distance measuring unit (13) respectively; the distance measuring unit (13) judges the abnormal data sent back by the sensor (2) and outputs a distance signal to the boost unit (14); the boost unit (14) analyzes the distance signal and outputs a control signal to the boost device to control the boost rate of the boost device.

2. The auxiliary directional long borehole gas extraction system according to claim 1, characterized in that: The boosting unit (14) comprises a primary boosting module (141) and a secondary boosting module (142); the primary boosting module (141) is electrically connected to the distance measuring unit (13) via the processor mainboard (11); and the secondary boosting module (142) is electrically connected to the sensor (2) at the bottom of the borehole via the processor mainboard (11).

3. The auxiliary directional long borehole gas extraction system according to claim 1, characterized in that: The gas extraction system further comprises an economic applicability determination unit (16) electrically connected to the processor mainboard (11).

4. The auxiliary directional long borehole gas extraction system according to claim 3, characterized in that: The economic applicability determination unit (16) is electrically connected to the gas concentration detection module (22) and the gas extraction pump respectively through the processor mainboard (11).

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