Blowout prevention and extraction increasing system and method for gas drilling

Abstract

The invention discloses a gas drilling blowout prevention and extraction increasing system and method, and relates to the technical field of coal mine gas enhanced extraction and permeability increasing. The system comprises an analysis unit, a database, a concentration module, a positioning module, a pressure module, a translation device and a mobile terminal, a port of the analysis unit is in data connection with the database, the pressure module, the translation device and the mobile terminal, and an output end of the concentration module is connected with an input end of the analysis unit. The output end of the positioning module is connected with the input end of the analysis unit, the pressure module is arranged at an orifice of a gas blowout prevention drill hole, the gas blowout prevention drill hole is a horizontal drill hole, the translation device is installed at the top of the pressure module, and the telescopic tail end of the translation device penetrates through the pressure module and extends into the gas blowout prevention drill hole. According to the method, the gas distribution condition is analyzed based on the flow model, and the permeability-increasing extraction can be matched with the gas distribution environment by continuously generating the newly-added vacancy coordinates and the closed vacancy coordinates.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine gas enhanced extraction and permeability enhancement, and in particular to a gas drilling blowout prevention and enhanced extraction system and method. Background Art

[0002] Coalbed methane (Methane) is an associated gas formed during coal mining. It is insoluble in water, does not support combustion and cannot sustain breathing. When it reaches a certain concentration, it can cause people to suffocate due to lack of oxygen. When the gas is mixed with air to a certain concentration, it can burn and explode when encountering fire. During the coal mining process, due to the influence of stress reduction, the gas stored in the coal seam will be released. With the deepening of coal mining, the amount of gas outburst is also increasing, which increases the incidence of safety accidents such as gas explosions, and poses a serious threat to coal mine safety production.

[0003] Coal seam extraction technology was proposed along with the mining of blowout-proof coal mines. The main hydraulic measures include hydraulic fracturing, hydraulic cutting, and high-pressure water jet drilling technology. Hydraulic fracturing is to inject high-pressure water into the coal seam to open, expand, and extend the primary coal cracks until they are interconnected, converting adsorbed gas into free gas, improving gas flow efficiency, and achieving gas extraction with increased permeability. Mine gas extraction is carried out according to standard procedures, and the working face environment of the mine is complex and the extraction conditions are different. The existing extraction equipment and extraction methods are not suitable for all mine working faces. Therefore, designing a gas extraction method that can be applied to different mine environments is a technical problem that technical personnel in this field need to solve. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a gas drilling blowout prevention and extraction enhancement system and method, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a gas drilling blowout prevention and extraction system, comprising an analysis unit, a database, a concentration module, a positioning module, a pressure module, a translation device and a mobile terminal, wherein the ports of the analysis unit respectively establish data connections with the database, the pressure module, the translation device and the mobile terminal, the output end of the concentration module is connected to the input end of the analysis unit, and the output end of the positioning module is connected to the input end of the analysis unit;

[0006] The pressure module is arranged at the orifice of the gas blowout prevention drilling hole, which is a horizontal drilling hole. The translation device is installed on the top of the pressure module. The retractable end of the translation device passes through the pressure module and extends into the gas blowout prevention drilling hole. The analysis unit sends a pressure instruction to the pressure module. The pressure unit changes the water pressure in the gas blowout prevention drilling hole according to the pressure instruction. The positioning module is installed on the side of the pressure module. The positioning module obtains the position information of the gas blowout prevention drilling hole where the pressure module is located and transmits it to the analysis unit. The concentration module is fixed on the retractable end of the translation device located inside the gas blowout prevention drilling hole. The concentration module obtains the gas concentration inside the gas blowout prevention drilling hole and transmits it to the analysis unit.

[0007] The mobile terminal is used to upload the drilling direction and drilling depth of each gas blowout prevention drilling hole to the analysis unit, and the mobile terminal is used to download the coordinates of the newly added hole positions and the closed hole positions from the analysis unit. The fixed length of the translation device is l1, and the length range of the retractable end of the translation device is [0, l2]. The length of l2 is less than or equal to l1. When the length of the retractable end is 0, it means that the retractable end can be safely retracted into the fixed length l1.

[0008] The gas drilling blowout prevention and extraction method is implemented based on an analysis unit, a database, a concentration module, a positioning module, a pressure module, a translation device and a mobile terminal, and specifically includes the following steps:

[0009] Step 1: Establish a digital model. The positioning module transmits the position information to the analysis unit. The operator uses a mobile terminal to transmit the opening direction and opening depth of each gas blowout prevention drilling hole to the analysis unit. The analysis unit executes a spatial positioning program according to the position information to establish a digital model. The digital model includes a spatial coordinate system, coordinate points and line segments. The spatial coordinate system includes an x-axis, a y-axis and a z-axis. The sum of the fixed length l1 of the translation device and the maximum length l2 of the retractable end is less than the length of the opening depth. The analysis unit transfers the digital model to a database for easy reading during subsequent processing and analysis.

[0010] Step 2: Establishing a flow model. The analysis unit executes a flow analysis program to establish a flow model. The analysis unit transfers the flow model to a database for easy reading during subsequent processing and analysis. The gas distribution is analyzed based on the flow model. By establishing a digital model and a flow model, the gas distribution in the blowout prevention borehole of the mine working face can be quantified, which is convenient for viewing and analysis, and provides data reference for the increase and decrease feedback program;

[0011] Step 3: Analyze the increase and decrease of the hole positions. The analysis unit generates the coordinates of the newly added hole positions and the coordinates of the closed hole positions by executing the increase and decrease feedback program according to the flow model in a loop. The coordinates of the newly added hole positions include the location information of the newly added hole positions, the opening direction of the newly added hole positions, and the opening depth of the newly added hole positions. By continuously generating the coordinates of the newly added vacant positions and the closed vacant positions, the permeability enhancement and drainage can be matched with the gas distribution environment, thereby expanding the scope of application of the permeability enhancement and drainage of gas;

[0012] Step 4: Construction and adjustment of the gas blowout prevention borehole. The analysis unit transmits the coordinates of the newly added borehole position and the closed borehole position to the mobile terminal for the operator to view. The operator opens a new borehole according to the coordinates of the newly added borehole position, installs a pressure module, a translation device and a positioning module in the new borehole, and the operator closes the corresponding gas blowout prevention borehole according to the closed borehole position coordinates, and disassembles the corresponding pressure module, translation device and positioning module on the closed gas blowout prevention borehole;

[0013] The flow analysis procedure specifically comprises the following steps:

[0014] Step 21: the analysis unit randomly sends a pressure instruction to any one of the pressure modules, and the pressure module increases the water pressure in the corresponding gas blowout prevention borehole. The analysis unit marks the gas blowout prevention borehole with increased water pressure as a pressure point in the digital model;

[0015] Step 22: The analysis unit sends a telescopic instruction to all translation devices except the pressure point, and the telescopic end of the translation device moves horizontally back and forth at a moving speed v1 inside the gas blowout prevention drilling hole, and the telescopic end drives the corresponding concentration module to move horizontally back and forth synchronously inside the gas blowout prevention drilling hole. The concentration module obtains the gas concentration inside the gas blowout prevention drilling hole once every standard time t1 and transmits it to the analysis unit;

[0016] Step 23: Analyze the cells according to the formula The number of collection points p of gas concentration inside each gas blowout prevention borehole is calculated. The analysis unit marks the collection points on the corresponding line segment in the digital model according to the number of each collection point p. The analysis unit starts with the coordinate point and marks the number j of the collection points in sequence according to the positive integer order. The range of j is 0<j≤p. When the concentration module translates through the collection point, it obtains the gas concentration once and transmits it to the analysis unit together with the collection point length jl. The collection point length is expressed as

[0017]

[0018] Step 24: the analysis unit assigns the gas concentration to the corresponding line segment in the digital model according to the received gas concentration and the acquisition point length jl;

[0019] Step 25: The analysis unit repeats the assignment operation of step 24 until all the collection points of all gas blowout prevention boreholes have completed the gas concentration collection, and the gas concentrations obtained by the concentration module are synchronously assigned to the line segments of the digital model;

[0020] Step 26: the analysis unit reads the digital model from the database, and the analysis unit subtracts the gas concentration difference between adjacent collection points on the same line segment in the digital model to obtain the gas concentration difference between each collection point. The analysis unit marks the first flow arrow according to the gas concentration difference between the collection points. When the gas concentration difference is greater than or equal to zero, the first flow arrow points from the subtrahend to the minuend, and when the gas concentration difference is less than zero, the first flow arrow points from the minuend to the subtrahend;

[0021] Step 27: the analysis unit adds the gas concentrations of all the acquisition points on the same line segment in the digital model to obtain the coordinate concentration of each line segment, and subtracts the coordinate concentrations of the line segments with similar distances in the digital model to obtain the coordinate concentration difference. The analysis unit marks the second flow arrow according to the coordinate concentration difference between the line segments. When the coordinate concentration difference is greater than or equal to zero, the second flow arrow points from the subtrahend to the minuend, and when the coordinate concentration difference is less than zero, the second flow arrow points from the minuend to the subtrahend;

[0022] Step 28: The analysis unit inputs the first flow arrow and the second flow arrow into the digital model to obtain a flow model.

[0023] Furthermore, the spatial positioning program specifically includes the following steps:

[0024] Step 101: the analysis unit splits all the position information into coordinate values ​​in three directions: x-axis, y-axis and z-axis. The analysis unit adds up all the x-axis coordinate values ​​and divides them by the number of positioning modules to obtain the average coordinate value of the x-axis. The analysis unit adds up all the y-axis coordinate values ​​and divides them by the number of positioning modules to obtain the average coordinate value of the y-axis. The analysis unit adds up all the z-axis coordinate values ​​and divides them by the number of positioning modules to obtain the average coordinate value of the z-axis. The analysis unit combines the average coordinate value of the x-axis, the average coordinate value of the y-axis and the average coordinate value of the z-axis into an origin, and the analysis unit establishes a spatial coordinate system based on the origin.

[0025] Step 102: The analysis unit inputs the location information of all gas blowout prevention holes into the spatial coordinate system to obtain the coordinate point corresponding to each gas blowout prevention hole. The analysis unit draws a line segment in the spatial coordinate system with the coordinate point as the starting point according to the hole opening direction uploaded by the mobile terminal. The analysis unit determines the length of the line segment according to the hole opening depth uploaded by the mobile terminal. The analysis unit summarizes the spatial coordinate system, the coordinate points corresponding to all gas blowout prevention holes, and the line segments corresponding to all gas blowout prevention holes to obtain a digital model.

[0026] Furthermore, the moving speed v1 and the standard time t1 are obtained by the following steps:

[0027] Step 221: The operator counts the number q of gas blowout prevention drilling holes in the mine, and the operator measures the area s1 of the mine working surface where the gas blowout prevention drilling holes are located by using a measuring tool. The operator uploads the number q and the area s1 to the analysis unit through a mobile terminal;

[0028] Step 222: The analysis unit calculates the distance d1 between the pressure point and each coordinate point according to the formula The moving speed v1 of the retractable end of the translation device is calculated;

[0029] Step 223: the analysis unit obtains the pressure value Pr1 of the pressure module at the pressure point, obtains the pressure values ​​Pr2 of the pressure modules at all coordinate points except the pressure point, calculates the average value Pr3 of all the pressure values ​​Pr2, and calculates the pressure difference Pr4 between the pressure value Pr1 at the pressure point and the average value Pr3;

[0030] Step 224: Analyze the unit according to the formula The standard time t1 is obtained by calculation.

[0031] Furthermore, the increase / decrease feedback procedure specifically includes the following steps:

[0032] Step 31: the analysis unit reads the flow model from the database, and the analysis unit calculates the x-axis angle An1 between the first flow arrow and the second flow arrow in the flow model and the spatial coordinate system, calculates the y-axis angle An2 between the first flow arrow and the second flow arrow in the flow model and the spatial coordinate system, and calculates the z-axis angle An3 between the first flow arrow and the second flow arrow in the flow model and the spatial coordinate system;

[0033] Step 32: The analysis unit classifies the first flow arrow and the second flow arrow according to the angles An1, An2 and An3. When An1<0, An2<0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the first direction. When An1<0, An2<0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the second direction. When An1<0, An2>0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the third direction. When An1<0, An2>0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the third direction. The first flow arrow and the second flow arrow are marked as a fourth direction, when An1>0, An2<0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as a fifth direction, when An1>0, An2<0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as a sixth direction, when An1>0, An2>0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as a seventh direction, and when An1>0, An2>0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as an eighth direction;

[0034] Step 33: the analysis unit counts the number of the first flow arrows and the second flow arrows in the first direction and marks them as a1 and b1 respectively, the analysis unit counts the number of the first flow arrows and the second flow arrows in the second direction and marks them as a2 and b2 respectively, the analysis unit counts the number of the first flow arrows and the second flow arrows in the third direction and marks them as a3 and b3 respectively, the analysis unit counts the number of the first flow arrows and the second flow arrows in the fourth direction and marks them as a4 and b4 respectively, the analysis unit counts the number of the first flow arrows and the second flow arrows in the fifth direction and marks them as a5 and b5 respectively, the analysis unit counts the number of the first flow arrows and the second flow arrows in the sixth direction and marks them as a6 and b6 respectively, the analysis unit counts the number of the first flow arrows and the second flow arrows in the seventh direction and marks them as a7 and b7 respectively, the analysis unit counts the number of the first flow arrows and the second flow arrows in the seventh direction and marks them as a8 and b8 respectively;

[0035] Step 34: The analysis unit presets and initializes the weight value of the first flow arrow to w1, and the initial value of the weight value w1 is 0.02. The analysis unit presets and initializes the weight value of the second flow arrow to w2, and the initial value of the weight value w2 is

[0036] Step 35: The analysis unit calculates the flow index k of the flow model according to the formula

[0037] The magnitude of the flow index k can reflect the gas flow efficiency in the flow model. The analysis unit inputs the flow index k into the formula to obtain the adjusted coordinates Pr, where r is a random number generated by the analysis unit, and the value range of the random number r is 0.1 < r < 0.9. Here, Prx is the x-axis value of the adjusted coordinates, Pry is the y-axis value of the adjusted coordinates, and Prz is the z-axis value of the adjusted coordinates. When the flow index k is greater than or equal to 10, the analysis unit marks the adjusted coordinates Pr as the coordinates of the newly added hole. When the flow index k is less than 10, the analysis unit marks the gas blowout prevention borehole closest to the adjusted coordinates Pr as the coordinates of the closed hole;

[0038] Step 36: The analysis unit uses the gas blowout prevention borehole closest to the adjusted coordinates Pr as the construction reference, and makes the opening direction and opening depth of the coordinates of the newly added hole consistent with the construction reference. When the adjusted coordinates Pr are marked as the coordinates of the newly added hole, the value of the weight w1 decreases by 0.012, and the value of the weight w2 increases by 0.15. When the adjusted coordinates Pr are marked as the coordinates of the closed hole, the value of the weight w1 increases by 0.015, and the value of the weight w2 decreases by 0.12. By repeatedly executing the increase and decrease feedback program, the values of the weights w1 and w2 can be continuously adjusted.

[0039] The present invention has the following beneficial effects:

[0040] 1. Based on the analysis of the gas distribution in the flow model, by continuously generating the coordinates of newly added empty holes and closed empty holes, it is possible to match the permeability enhancement extraction with the gas distribution environment, and expand the applicable range of gas permeability enhancement extraction.

[0041] 2. By establishing a digital model and a flow model, the gas distribution in the gas blowout prevention boreholes of the mine working face can be quantified, which is convenient for viewing and analysis, and provides data reference for the increase and decrease feedback program.

[0042] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0044] Figure 1 This is a block diagram of the gas drilling blowout prevention and extraction enhancement system of the present invention;

[0045] Figure 2 The present invention is a flow chart of the method for preventing gas blowout and increasing extraction through gas drilling. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1 , the present invention provides a technical solution: a gas drilling blowout prevention and extraction system, comprising an analysis unit, a database, a concentration module, a positioning module, a pressure module, a translation device and a mobile terminal, the ports of the analysis unit respectively establish data connections with the database, the pressure module, the translation device and the mobile terminal, the output end of the concentration module is connected to the input end of the analysis unit, and the output end of the positioning module is connected to the input end of the analysis unit;

[0048] The pressure module is arranged at the orifice of the gas blowout prevention drilling hole, which is a horizontal drilling hole. The translation device is installed on the top of the pressure module. The retractable end of the translation device passes through the pressure module and extends into the gas blowout prevention drilling hole. The analysis unit sends a pressure instruction to the pressure module. The pressure unit changes the water pressure in the gas blowout prevention drilling hole according to the pressure instruction. The positioning module is installed on the side of the pressure module. The positioning module obtains the position information of the gas blowout prevention drilling hole where the pressure module is located and transmits it to the analysis unit. The concentration module is fixed on the retractable end of the translation device located inside the gas blowout prevention drilling hole. The concentration module obtains the gas concentration inside the gas blowout prevention drilling hole and transmits it to the analysis unit.

[0049] The mobile terminal is used to upload the drilling direction and drilling depth of each gas blowout prevention drilling hole to the analysis unit. The mobile terminal is used to download the coordinates of the newly added hole positions and the closed hole positions from the analysis unit. The fixed length of the translation device is l1, and the length range of the retractable end of the translation device is [0, l2]. The length of l2 is less than or equal to l1. When the length of the retractable end is 0, it means that the retractable end is safely retracted into the fixed length l1.

[0050] like Figure 2 As shown, the method for preventing gas blowout and increasing gas extraction in gas drilling is implemented based on an analysis unit, a database, a concentration module, a positioning module, a pressure module, a translation device and a mobile terminal, and specifically includes the following steps:

[0051] Step 1: Establish a digital model. The positioning module transmits the position information to the analysis unit. The operator uses a mobile terminal to transmit the opening direction and opening depth of each gas blowout prevention drilling hole to the analysis unit. The analysis unit executes a spatial positioning program according to the position information to establish a digital model. The digital model includes a spatial coordinate system, coordinate points and line segments. The spatial coordinate system includes an x-axis, a y-axis and a z-axis. The sum of the fixed length l1 of the translation device and the maximum length l2 of the retractable end is less than the length of the opening depth. The analysis unit transfers the digital model to a database for easy reading during subsequent processing and analysis.

[0052] Step 2: Establishing a flow model. The analysis unit executes the flow analysis program to establish the flow model. The analysis unit transfers the flow model to the database for easy reading in subsequent processing and analysis.

[0053] Step 3: Analyze the increase and decrease of hole positions. The analysis unit generates the coordinates of the newly added hole positions and the coordinates of the closed hole positions by executing the increase and decrease feedback program cyclically according to the flow model. The coordinates of the newly added hole positions include the position information of the newly added hole positions, the opening direction of the newly added hole positions, and the opening depth of the newly added hole positions.

[0054] Step 4: Construction and adjustment of the gas blowout prevention borehole. The analysis unit transmits the coordinates of the newly added borehole position and the closed borehole position to the mobile terminal for the operator to view. The operator opens a new borehole according to the coordinates of the newly added borehole position, installs a pressure module, a translation device and a positioning module in the new borehole, and the operator closes the corresponding gas blowout prevention borehole according to the closed borehole position coordinates, and disassembles the corresponding pressure module, translation device and positioning module on the closed gas blowout prevention borehole;

[0055] The flow analysis procedure specifically includes the following steps:

[0056] Step 21: The analysis unit randomly sends a pressure instruction to any one of the pressure modules, and the pressure module increases the water pressure in the corresponding gas blowout prevention borehole. The analysis unit marks the gas blowout prevention borehole with increased water pressure as a pressure point in the digital model;

[0057] Step 22: The analysis unit sends a telescopic instruction to all translation devices except the pressure point. The telescopic end of the translation device moves horizontally back and forth at a moving speed v1 inside the gas blowout prevention drilling hole. The telescopic end drives the corresponding concentration module to move horizontally back and forth synchronously inside the gas blowout prevention drilling hole. The concentration module obtains the gas concentration inside the gas blowout prevention drilling hole once every standard time t1 and transmits it to the analysis unit.

[0058] Step 23: Analyze the cells according to the formula The number of collection points p of gas concentration inside each gas blowout prevention borehole is calculated. The analysis unit marks the collection points on the corresponding line segment in the digital model according to the number of each collection point p. The analysis unit starts with the coordinate point and marks the number j of the collection points in order of positive integers. The range of j is 0<j≤p. When the concentration module moves through the collection point, it obtains the gas concentration once and transmits it to the analysis unit together with the collection point length jl. The collection point length is expressed as

[0059]

[0060] Step 24: the analysis unit assigns the gas concentration to the corresponding line segment in the digital model according to the received gas concentration and the acquisition point length jl;

[0061] Step 25: The analysis unit repeats the assignment operation of step 24 until all the collection points of all gas blowout prevention boreholes have completed the gas concentration collection, and the gas concentrations obtained by the concentration module are synchronously assigned to the line segments of the digital model;

[0062] Step 26: The analysis unit subtracts the gas concentration difference between adjacent collection points on the same line segment in the digital model to obtain the gas concentration difference between each collection point. The analysis unit marks the first flow arrow according to the gas concentration difference between the collection points. When the gas concentration difference is greater than or equal to zero, the first flow arrow points from the subtrahend to the minuend. When the gas concentration difference is less than zero, the first flow arrow points from the minuend to the subtrahend.

[0063] Step 27: the analysis unit adds the gas concentrations of all the acquisition points on the same line segment in the digital model to obtain the coordinate concentration of each line segment, and subtracts the coordinate concentrations of the line segments with similar distances in the digital model to obtain the coordinate concentration difference. The analysis unit marks the second flow arrow according to the coordinate concentration difference between the line segments. When the coordinate concentration difference is greater than or equal to zero, the second flow arrow points from the subtrahend to the minuend, and when the coordinate concentration difference is less than zero, the second flow arrow points from the minuend to the subtrahend;

[0064] Step 28: The analysis unit inputs the first flow arrow and the second flow arrow into the digital model to obtain a flow model.

[0065] The spatial positioning procedure specifically includes the following steps:

[0066] Step 101: the analysis unit splits all the position information into coordinate values ​​in three directions: x-axis, y-axis and z-axis. The analysis unit adds all the x-axis coordinate values ​​and divides them by the number of positioning modules to obtain the average coordinate value of the x-axis. The analysis unit adds all the y-axis coordinate values ​​and divides them by the number of positioning modules to obtain the average coordinate value of the y-axis. The analysis unit adds all the z-axis coordinate values ​​and divides them by the number of positioning modules to obtain the average coordinate value of the z-axis. The analysis unit combines the average coordinate value of the x-axis, the average coordinate value of the y-axis and the average coordinate value of the z-axis into an origin, and the analysis unit establishes a spatial coordinate system based on the origin.

[0067] Step 102: The analysis unit inputs the location information of all gas blowout prevention holes into the spatial coordinate system to obtain the coordinate point corresponding to each gas blowout prevention hole. The analysis unit draws a line segment in the spatial coordinate system with the coordinate point as the starting point according to the hole opening direction uploaded by the mobile terminal. The analysis unit determines the length of the line segment according to the hole opening depth uploaded by the mobile terminal. The analysis unit summarizes the spatial coordinate system, the coordinate points corresponding to all gas blowout prevention holes, and the line segments corresponding to all gas blowout prevention holes to obtain a digital model.

[0068] The moving speed v1 and the standard time t1 are obtained by the following steps:

[0069] Step 221: The operator counts the number q of gas blowout prevention drilling holes in the mine, and the operator measures the area s1 of the mine working surface where the gas blowout prevention drilling holes are located by using a measuring tool. The operator uploads the number q and the area s1 to the analysis unit through a mobile terminal;

[0070] Step 222: The analysis unit calculates the distance d1 between the pressure point and each coordinate point. The analysis unit calculates the distance d1 between the pressure point and each coordinate point according to the formula The moving speed v1 of the retractable end of the translation device is calculated;

[0071] Step 223: the analysis unit obtains the pressure value Pr1 of the pressure module at the pressure point, obtains the pressure values ​​Pr2 of the pressure modules at all coordinate points except the pressure point, calculates the average value Pr3 of all the pressure values ​​Pr2, and calculates the pressure difference Pr4 between the pressure value Pr1 at the pressure point and the average value Pr3;

[0072] Step 224: Analyze the unit according to the formula The standard time t1 is obtained by calculation.

[0073] The increase and decrease feedback procedure specifically includes the following steps:

[0074] Step 31: the analysis unit calculates the x-axis angle An1 between the first flow arrow and the second flow arrow in the flow model and the spatial coordinate system, calculates the y-axis angle An2 between the first flow arrow and the second flow arrow in the flow model and the spatial coordinate system, and calculates the z-axis angle An3 between the first flow arrow and the second flow arrow in the flow model and the spatial coordinate system;

[0075] Step 32: The analysis unit classifies the first flow arrow and the second flow arrow according to the angles An1, An2 and An3. When An1<0, An2<0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the first direction. When An1<0, An2<0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the second direction. When An1<0, An2>0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the third direction. When An1<0, An2>0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as the third direction. The first flow arrow and the second flow arrow are marked as a fourth direction, when An1>0, An2<0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as a fifth direction, when An1>0, An2<0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as a sixth direction, when An1>0, An2>0, and An3<0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as a seventh direction, and when An1>0, An2>0, and An3>0 of the first flow arrow and the second flow arrow, the analysis unit marks the corresponding first flow arrow and the second flow arrow as an eighth direction;

[0076] Step 33: The analysis unit counts the number of the first flow arrows and the second flow arrows in the first direction and marks them as a1 and b1 respectively, counts the number of the first flow arrows and the second flow arrows in the second direction and marks them as a2 and b2 respectively, counts the number of the first flow arrows and the second flow arrows in the third direction and marks them as a3 and b3 respectively, counts the number of the first flow arrows and the second flow arrows in the fourth direction and marks them as a4 and b4 respectively, counts the number of the first flow arrows and the second flow arrows in the fifth direction and marks them as a5 and b5 respectively, counts the number of the first flow arrows and the second flow arrows in the sixth direction and marks them as a6 and b6 respectively, counts the number of the first flow arrows and the second flow arrows in the seventh direction and marks them as a7 and b7 respectively, counts the number of the first flow arrows and the second flow arrows in the seventh direction and marks them as a8 and b8 respectively;

[0077] Step 34: The analysis unit presets the weight value of the first flow arrow as w1 and initializes it. The initial value of the weight value w1 is 0.02. The analysis unit presets the weight value of the second flow arrow as w2 and initializes it. The initial value of the weight value w2 is

[0078] Step 35: The analysis unit calculates the flow index k of the flow model according to the formula

[0079] The analysis unit inputs the flow index k into the formula to obtain the adjusted coordinate Pr, where r is a random number generated by the analysis unit, and the value range of the random number r is 0.1 < r < 0.9. Prx is the x-axis value of the adjusted coordinate, Pry is the y-axis value of the adjusted coordinate, and Prz is the z-axis value of the adjusted coordinate. When the flow index k is greater than or equal to 10, the analysis unit marks the adjusted coordinate Pr as the new hole position coordinate. When the flow index k is less than 10, the analysis unit marks the gas blowout prevention drilling hole closest to the adjusted coordinate Pr as the closed hole position coordinate;

[0080] Step 36: The analysis unit uses the gas blowout prevention drilling hole closest to the adjusted coordinate Pr as the construction reference, and makes the opening direction and opening depth of the new hole position coordinate consistent with the construction reference. When the adjusted coordinate Pr is marked as the new hole position coordinate, the value of the weight value w1 decreases by 0.012, and the value of the weight value w2 increases by 0.15. When the adjusted coordinate Pr is marked as the closed hole position coordinate, the value of the weight value w1 increases by 0.015, and the value of the weight value w2 decreases by 0.12. By repeatedly executing the increase and decrease feedback program, the values of the weight value w1 and the weight value w2 can be continuously adjusted.

[0081] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Gas drilling blowout prevention and extraction system, characterized by: It includes an analysis unit, a database, a concentration module, a positioning module, a pressure module, a translation device and a mobile terminal, wherein the ports of the analysis unit respectively establish data connections with the database, the pressure module, the translation device and the mobile terminal, the output end of the concentration module is connected to the input end of the analysis unit, and the output end of the positioning module is connected to the input end of the analysis unit; The pressure module is arranged at the orifice of the gas blowout prevention drilling hole, which is a horizontal drilling hole. The translation device is installed on the top of the pressure module. The retractable end of the translation device passes through the pressure module and extends into the gas blowout prevention drilling hole. The analysis unit sends a pressure instruction to the pressure module. The pressure unit changes the water pressure in the gas blowout prevention drilling hole according to the pressure instruction. The positioning module is installed on the side of the pressure module. The positioning module obtains the position information of the gas blowout prevention drilling hole where the pressure module is located and transmits it to the analysis unit. The concentration module is fixed on the retractable end of the translation device located inside the gas blowout prevention drilling hole. The concentration module obtains the gas concentration inside the gas blowout prevention drilling hole and transmits it to the analysis unit. The mobile terminal is used to upload the drilling direction and drilling depth of each gas blowout prevention drilling hole to the analysis unit, and the mobile terminal is used to download the coordinates of the newly added hole positions and the closed hole positions from the analysis unit. The fixed length of the translation device is l1, and the length range of the retractable end of the translation device is [0, l2], and the length of l2 is less than or equal to l1.

2. A method for preventing gas blowout and increasing gas extraction by drilling a gas hole, characterized in that: The gas drilling blowout prevention and extraction enhancement system applied to claim 1 comprises the following steps: Step 1: The positioning module transmits the position information to the analysis unit. The operator uses a mobile terminal to transmit the drilling direction and drilling depth of each gas blowout prevention drilling hole to the analysis unit. The digital model is established by executing a spatial positioning program according to the position information. The digital model includes a spatial coordinate system, coordinate points and line segments. The spatial coordinate system includes an x-axis, a y-axis and a z-axis. The sum of the fixed length l1 of the translation device and the maximum length l2 of the retractable end is less than the length of the drilling depth. The digital model is transferred to the database. Step 2: The analysis unit executes a flow analysis program to establish a flow model, and transfers the flow model to a database; Step 3: According to the flow model, the increase and decrease feedback program is cyclically executed to generate the coordinates of the newly added hole positions and the coordinates of the closed hole positions. The coordinates of the newly added hole positions include the position information, the opening direction and the opening depth of the newly added hole positions; Step 4: The coordinates of the newly added hole positions and the closed hole positions are transmitted to the mobile terminal for the operator to view. The operator opens a new borehole according to the coordinates of the newly added hole positions, installs a pressure module, a translation device and a positioning module in the new borehole, and the operator closes the corresponding gas blowout prevention borehole according to the coordinates of the closed hole positions, and disassembles the corresponding pressure module, translation device and positioning module; The flow analysis procedure specifically includes the following steps: Step 21: randomly sending a pressure instruction to any one of the pressure modules, the pressure module increases the water pressure in the corresponding gas blowout prevention borehole, and marks the gas blowout prevention borehole with increased water pressure as a pressure point in the digital model; Step 22: The analysis unit sends a telescopic instruction to all translation devices except the pressure point. The telescopic end of the translation device moves horizontally back and forth at a moving speed v1 inside the gas blowout prevention drilling hole. The telescopic end drives the concentration module to move horizontally back and forth synchronously. The concentration module obtains the gas concentration inside the gas blowout prevention drilling hole once every standard time t1 and transmits it to the analysis unit. Step 23: According to the formula Calculate the number of collection points p of gas concentration inside each gas blowout prevention borehole, mark the collection points on the corresponding line segment in the digital model according to the number of each collection point p, and the analysis unit starts with the coordinate point and marks the number j of the collection points in sequence according to the positive integer order, and the range of j is 0<j≤p. When the concentration module translates through the collection point, it obtains the gas concentration once and transmits it to the analysis unit together with the collection point length jl. The collection point length is expressed as Step 24: assigning the gas concentration to the corresponding line segment in the digital model according to the received gas concentration and the acquisition point length jl; Step 25: The analysis unit repeats the assignment operation of step 24 until all the collection points of all gas blowout prevention boreholes have completed the gas concentration collection, and the gas concentrations obtained by the concentration module are synchronously assigned to the line segments of the digital model; Step 26: Subtract the gas concentration difference between adjacent collection points on the same line segment in the digital model to obtain the gas concentration difference between each collection point, and mark the first flow arrow according to the gas concentration difference between the collection points. When the gas concentration difference is greater than or equal to zero, the first flow arrow points from the subtrahend to the minuend, and when the gas concentration difference is less than zero, the first flow arrow points from the minuend to the subtrahend; Step 27: Add the gas concentrations of all the collection points on the same line segment in the digital model to obtain the coordinate concentration of each line segment, subtract the coordinate concentrations of the line segments with similar distances in the digital model to obtain the coordinate concentration difference, and mark the second flow arrow according to the coordinate concentration difference between the line segments. When the coordinate concentration difference is greater than or equal to zero, the second flow arrow points from the subtrahend to the minuend, and when the coordinate concentration difference is less than zero, the second flow arrow points from the minuend to the subtrahend; Step 28: Input the first flow arrow and the second flow arrow into the digital model to obtain a flow model.

3. The method for preventing gas blowout and increasing gas extraction from gas drilling holes according to claim 2, characterized in that: The spatial positioning procedure specifically includes the following steps: Step 101: split all position information into coordinate values ​​in three directions: x-axis, y-axis and z-axis; add all x-axis coordinate values ​​and divide them by the number of positioning modules to obtain the average coordinate value of the x-axis; add all y-axis coordinate values ​​and divide them by the number of positioning modules to obtain the average coordinate value of the y-axis; add all z-axis coordinate values ​​and divide them by the number of positioning modules to obtain the average coordinate value of the z-axis; combine the average coordinate value of the x-axis, the average coordinate value of the y-axis and the average coordinate value of the z-axis into an origin; and the analysis unit establishes a spatial coordinate system based on the origin; Step 102: All position information is input into the spatial coordinate system to obtain the coordinate point corresponding to each gas blowout prevention drilling hole, and a line segment is drawn in the spatial coordinate system with the coordinate point as the starting point according to the drilling direction, and the length of the line segment is determined according to the drilling depth. The spatial coordinate system, all coordinate points and all line segments are summarized to obtain a digital model.

4. The method for preventing gas blowout and increasing gas extraction from gas drilling holes according to claim 2, characterized in that: The moving speed v1 and the standard time t1 are obtained by the following steps: Step 221: The operator counts the number q of gas blowout prevention drilling holes in the mine, and the operator measures the area s1 of the mine working surface where the gas blowout prevention drilling holes are located by using a measuring tool. The operator uploads the number q and the area s1 to the analysis unit through a mobile terminal; Step 222: The analysis unit calculates the distance d1 between the pressure point and each coordinate point according to the formula The moving speed v1 of the retractable end of the translation device is calculated; Step 223: Obtain the pressure value Pr1 of the pressure module at the pressure point, the analysis unit obtains the pressure values ​​Pr2 of the pressure modules of all coordinate points except the pressure point, the analysis unit calculates the average value Pr3 of all the pressure values ​​Pr2, and calculates the pressure difference Pr4 between the pressure value Pr1 of the pressure point and the average value Pr3; Step 224: According to the formula The standard time t1 is obtained by calculation.

5. The method for preventing gas blowout and increasing gas extraction from gas drilling holes according to claim 2, characterized in that: The increase and decrease feedback procedure specifically includes the following steps: Step 31: the analysis unit calculates the x-axis angle An1 between the first flow arrow and the second flow arrow and the spatial coordinate system, calculates the y-axis angle An2 between the first flow arrow and the second flow arrow and the spatial coordinate system, and calculates the z-axis angle An3 between the first flow arrow and the second flow arrow and the spatial coordinate system; Step 32: classify the first flow arrow and the second flow arrow according to the angles An1, An2 and An3, and when An1<0, An2<0, and An3<0 of the first flow arrow and the second flow arrow, mark the corresponding first flow arrow and the second flow arrow as the first direction; when An1<0, An2<0, and An3>0, mark them as the second direction; when An1<0, An2>0, and An3<0, mark them as the third direction; when An1<0, An2>0, and An3>0, mark them as the fourth direction; when An1>0, An2<0, and An3<0, mark them as the fifth direction; when An1>0, An2<0, and An3<0, mark them as the sixth direction; when An1>0, An2>0, and An3<0, mark them as the seventh direction; when An1>0, An2>0, and An3>0, mark them as the eighth direction; Step 33: Count the number of the first flow arrows and the second flow arrows in the first direction and mark them as a1 and b1 respectively, count the number of the first flow arrows and the second flow arrows in the second direction and mark them as a2 and b2 respectively, count the number of the first flow arrows and the second flow arrows in the third direction and mark them as a3 and b3 respectively, count the number of the first flow arrows and the second flow arrows in the fourth direction and mark them as a4 and b4 respectively, count the number of the first flow arrows and the second flow arrows in the fifth direction and mark them as a5 and b5 respectively, count the number of the first flow arrows and the second flow arrows in the sixth direction and mark them as a6 and b6 respectively, count the number of the first flow arrows and the second flow arrows in the seventh direction and mark them as a7 and b7 respectively, count the number of the first flow arrows and the second flow arrows in the seventh direction and mark them as a8 and b8 respectively; Step 34: The analysis unit presets and initializes the weight value of the first flow arrow to w1, and the initial value of the weight value w1 is 0.

02. The analysis unit presets and initializes the weight value of the second flow arrow to w2, and the initial value of the weight value w2 is Step 35: According to the formula Calculate the flow index k of the flow model and input the flow index k into the formula Obtain the adjusted coordinates Pr, where r is a random number generated by the analysis unit, and the value range of the random number r is 0.1 < r < 0.

9. Here, Prx is the x-axis value of the adjusted coordinates, Pry is the y-axis value of the adjusted coordinates, and Prz is the z-axis value of the adjusted coordinates. When the flow index k is greater than or equal to 10, mark the adjusted coordinates Pr as the coordinates of the newly added hole. When the flow index k is less than 10, mark the gas blowout prevention drilling hole closest to the adjusted coordinates Pr as the coordinates of the closed hole; Step 36: The analysis unit uses the gas blowout prevention drilling hole closest to the adjustment coordinate Pr as a construction reference, and keeps the drilling direction and drilling depth of the newly added hole coordinates consistent with the construction reference. When the adjustment coordinate Pr is marked as the newly added hole coordinate, the weight value w1 is reduced by 0.012, and the weight value w2 is increased by 0.

15. When the adjustment coordinate Pr is marked as the closed hole coordinate, the weight value w1 is increased by 0.015, and the weight value w2 is reduced by 0.12.

Images