Blasting smoke prevention and control method and system for large-section underground petroleum reserve cave depot

Abstract

The invention discloses a blasting smoke dust prevention and control method and system for a large-section underground petroleum reserve cave depot, and relates to the technical field of blasting smoke dust prevention and control. The method comprises the steps that smoke dust parameter sensors are arranged in a plurality of preset monitoring areas between a charging trolley and a tunnel face in a blasting area; based on a smoke parameter sensor, smoke parameters of the multiple preset monitoring areas after blasting are obtained; on the basis of the smoke dust parameters, the time-air transportation rule of tunneling blasting dust and smoke in the blasting area is determined; and on the basis of a time-air transportation rule, determining an effective area and an injection path which need to be covered by mist spray for treating smoke dust. The technical problem that in the prior art, the dust falling efficiency is low is solved.

Description

Technical Field

[0001] The invention relates to the technical field of blasting smoke prevention and control, in particular to a method and system for preventing and controlling blasting smoke from a large-section underground petroleum storage cavern. Background Art

[0002] During the construction of underground oil storage caverns, a large number of engineering blasting links are involved. The blasting construction area is mainly between the charging trolley and the face. The blasting in this area will bring a lot of smoke and dust, which seriously affects the health of the construction workers in this area. Therefore, it is necessary to conduct safety monitoring of the area between the charging trolley and the face, determine the spatial distribution of dust and toxic and harmful gases in this area, and carry out targeted dust removal and prevention.

[0003] At present, the main method for preventing and controlling smoke and dust during underground cavern blasting construction is dust reduction by water sprinkler trucks. Due to the limited space in the cavern construction area, the traditional method can only reduce dust in local areas. The dust reduction effect and dust reduction area are limited by the size of the construction space, and it is impossible to avoid complete isolation of personnel during the dust reduction process. Since the distribution of smoke and dust generated after blasting changes over time, the traditional method can only reduce dust in the main area where the smoke and dust are initially generated, and cannot achieve real-time monitoring and control of dust reduction efficiency. Summary of the invention

[0004] In order to solve the above technical problems existing in the prior art, the embodiment of the present invention provides a method and system for preventing and controlling blasting smoke and dust in a large-section underground petroleum storage cavern. The technical solution is as follows:

[0005] On the one hand, a method for preventing and controlling blasting smoke and dust in a large-section underground oil storage cavern is provided, which is applied to the blasting area in the large-section underground oil storage cavern; the method comprises: setting smoke and dust parameter sensors in multiple preset monitoring areas between the charging trolley and the face in the blasting area; based on the smoke and dust parameter sensors, obtaining the smoke and dust parameters of the multiple preset monitoring areas after blasting; based on the smoke and dust parameters, determining the spatiotemporal migration law of excavation blasting dust and smoke in the blasting area; based on the spatiotemporal migration law, determining the effective area and injection path that need to be covered by the spray for controlling smoke and dust.

[0006] Further, the preset monitoring area includes: taking four equal points on a straight line at a preset height above the bottom edge of the arched part of the tunnel face, taking eight equal points on the arc edge after the tunnel face is divided by the straight line, and taking interval points as the center of the circle to divide the circular range; calculating the initial radius of the circular range based on the initial radius calculation formula; wherein the initial radius calculation formula includes:

[0007]

[0008] Wherein, R is the radius of the tunnel face, and r is the initial radius; if the initial radius is less than or equal to the maximum monitoring radius of the smoke parameter sensor, the center of the circular range is used as the monitoring point and the circular range is used as the preset monitoring area; if the initial radius is greater than the maximum monitoring radius of the smoke parameter sensor, the circular range is further divided into circular sub-ranges by using the sensor equilateral triangle arrangement method within the circular range until the radius of the circular sub-range is less than or equal to the maximum detection radius of the smoke parameter sensor, and the circular sub-range is used as the preset monitoring area.

[0009] Furthermore, the smoke parameter sensor includes a dust monitoring sensor, a toxic and harmful gas monitoring sensor, and a wind speed monitoring sensor; the smoke parameters include: dust concentration and dust particle size, toxic and harmful gas concentration, toxic and harmful gas type, and wind speed data in each preset monitoring area.

[0010] Furthermore, based on the smoke parameters, the spatiotemporal migration law of excavation blasting dust and smoke in the blasting area is determined, including: based on the smoke parameters, establishing a real-time monitoring model for the spatiotemporal changes in dust and smoke concentration in the three-dimensional space between the face and the charging trolley; based on the smoke parameters, constructing multiple monitoring indicators; the monitoring indicators include wind speed, dust concentration, dust particle size, and toxic and harmful gas concentration; recording the time variation curve of the monitoring indicators of each preset monitoring area, analyzing the time variation law of the monitoring indicators of different preset monitoring areas, and obtaining the spatiotemporal migration law.

[0011] Furthermore, based on the temporal and spatial migration law, the effective area and injection path that need to be covered by the smoke control spray are determined, including: determining the preset monitoring area where the monitoring index exceeds the preset safety threshold as the effective area that needs to be covered by the smoke control spray; approximating the tunnel cross-section of the large-section underground oil storage cavern as an arch, approximating the space covered by the spray from the nozzle at one position to the heading as a cone, approximating the range covered by the spray on the tunnel cross-section in the middle as a circle, and calculating the minimum coverage radius of the cross-section where the spray reaches the effective area; determining the number of nozzles required to cover the entire tunnel cross-section and the coverage position coordinates on the tunnel cross-section according to the equilateral triangle rule.

[0012] Furthermore, the calculation formula for the minimum coverage radius of the cross section of the effective area reached by the spray includes:

[0013] r 1min =d1tanβ

[0014] Among them, r 1minis the minimum coverage radius of the cross section of the spray reaching the effective area; d1 is the distance between the charging trolley and the closest cross section reaching the effective area; β is the maximum elevation angle of the nozzle to generate the spray.

[0015] Furthermore, the method also includes: controlling the spray device to spray smoke control spray into the blasting area based on the effective area and the spray path.

[0016] Furthermore, the calculation formula for the nozzle water supply pressure of the spray device includes:

[0017]

[0018] Among them, d2 is the farthest distance from the nozzle to the tunnel section covered by the spray; r2 is the maximum coverage radius of the spray to the effective area section to be covered; c 2max To obtain the maximum concentration within the coverage range of each nozzle on different tunnel sections based on the monitoring data of the preset monitoring area; d0 is the average value of the dust particle size in the preset monitoring area; η is the spray dust removal efficiency; t0 is the total time of spray dust removal; t is the instantaneous time of spray dust removal; K is the shape coefficient of the nozzle mouth; p is the water supply pressure of the nozzle; v0 is the flow rate at the nozzle mouth.

[0019] On the other hand, a large-section underground oil reserve cavern blasting smoke and dust prevention system is also provided, which is applied to the blasting area in the large-section underground oil reserve cavern; it comprises: a smoke and dust parameter sensor, a data monitoring module and a spray device; wherein the smoke and dust parameter sensor is arranged in a plurality of preset monitoring areas between the charging trolley and the face in the blasting area, and the spray device is arranged on the charging trolley to form a spray-charging integrated trolley; the smoke and dust parameter sensor is used to obtain the smoke and dust parameters of the plurality of preset monitoring areas after blasting; the data monitoring module is used to determine the spatiotemporal migration law of the excavation blasting dust and smoke in the blasting area based on the smoke and dust parameters; the data monitoring module is also used to determine the effective area and injection path that the smoke and dust control spray needs to cover based on the spatiotemporal migration law; the spray device is used to spray the smoke and dust control spray into the blasting area based on the effective area and injection path.

[0020] Furthermore, the nozzle direction, nozzle position and number of nozzles of the spray device are determined based on the effective area and the injection path; including: arranging nozzles at equal distances and heights on both sides of the charging trolley and the middle support frame according to the number of nozzles required to cover the entire tunnel section of the large-section underground oil storage cave, so that each spray coverage range on the tunnel section corresponds one-to-one to the nearest nozzle on the charging trolley, and each spray coverage range is responsible for each corresponding nozzle to form a spray system; according to the effective area to be covered by the spray, the spray coverage range involved is determined, and only the corresponding nozzle is started; the injection direction of each nozzle is calculated according to the corresponding coverage position coordinates on the tunnel section; the water supply pressure of each nozzle is calculated according to the monitoring data of the preset monitoring area, and the start-up and pressure supply of the nozzle are automatically controlled in real time to form a pressure system.

[0021] The embodiment of the present invention provides a method and system for preventing and controlling smoke and dust from blasting a large-section underground petroleum storage cavern. The method and system can determine the temporal and spatial migration patterns of smoke and dust based on monitoring data, and adjust the nozzle spray path and pressure in a linked manner to achieve timely control of smoke and dust, thereby laying a foundation for preventing and controlling smoke and dust from blasting a large-section underground petroleum storage cavern and alleviating the technical problem of low dust reduction efficiency in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a flow chart of a method for preventing and controlling blasting smoke and dust in a large-section underground petroleum storage cavern provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of setting a preset monitoring area provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of determining the number of nozzles required to cover the tunnel interface using an equilateral triangle rule provided by an embodiment of the present invention;

[0026] Figure 4 The present invention is a schematic diagram of a large-section underground petroleum storage cavern blasting smoke and dust prevention system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is described below in conjunction with the accompanying drawings.

[0028] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either of the two.

[0029] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0030] Embodiment 1

[0031] Figure 1 The flowchart of a method for preventing and controlling blasting smoke and dust in a large-section underground oil storage cavern is provided according to an embodiment of the present invention. The method is applied to the blasting area in a large-section underground oil storage cavern. Figure 1 As shown, the method specifically comprises the following steps:

[0032] Step S102, smoke parameter sensors are set in a plurality of preset monitoring areas between the charging trolley and the tunnel face in the blasting area.

[0033] Step S104, based on the smoke parameter sensor, obtaining smoke parameters of multiple preset monitoring areas after blasting.

[0034] Step S106, based on the smoke parameters, determining the temporal and spatial migration patterns of the excavation blasting dust and smoke in the blasting area.

[0035] Step S108, based on the temporal and spatial migration law, determine the effective area and injection path that the smoke control spray needs to cover.

[0036] Preferably, the smoke parameter sensor is provided with a fixed support and a protective device. The fixed support device is designed to be arranged at different positions, and the smoke parameter sensor is prevented from being damaged during blasting by installing the protective device.

[0037] Figure 2 FIG. 1 is a schematic diagram of a preset monitoring area setting according to an embodiment of the present invention. Figure 2 As shown, the tunnel face is approximated as a combination of an arch and a rectangle; the preset monitoring area includes: taking four equal points on a straight line at a preset height (e.g., 1.5 m) above the bottom edge of the arched part of the tunnel face, taking eight equal points on the arc edge after the tunnel face is divided by the straight line, and taking interval points as the center of the circle to divide the circular range; the initial radius of the circular range is calculated based on the initial radius calculation formula; wherein the initial radius calculation formula includes:

[0038]

[0039] Where R is the radius of the tunnel face and r is the initial radius.

[0040] like Figure 2 As shown, two circular ranges are drawn with r as the radius, respectively passing through the equal division points of the straight edge of the tunnel face, so that the tunnel face is fully covered by the eight circular ranges formed.

[0041] If the initial radius is less than or equal to the maximum monitoring radius of the smoke parameter sensor, the center of the circular range is used as the monitoring point and the circular range is used as the preset monitoring area.

[0042] If the initial radius is larger than the maximum monitoring radius of the smoke parameter sensor, the circular sub-range is further divided within the circular range using the sensor equilateral triangle arrangement method until the radius of the circular sub-range is less than or equal to the maximum detection radius of the smoke parameter sensor, and the circular sub-range is used as the preset monitoring area.

[0043] Specifically, the uncovered area after division is further divided into circles using the equilateral triangle arrangement rule of sensors, and this step is repeated until the radius of the divided circular range is less than or equal to the maximum monitoring radius of the smoke parameter sensor; the circular area is divided in the rectangular part of the tunnel face using the equilateral triangle arrangement rule of sensors; the center of each divided circular range is used as the placement point of the smoke parameter sensor; a group of smoke parameter sensors is placed at every 5m horizontal distance between the charging trolley and the tunnel face according to the arrangement scheme; additional smoke parameter sensors are placed in areas where construction personnel gather and stay.

[0044] The sensor equilateral triangle layout rule is to divide the preset monitoring area into equilateral triangles and arrange the smoke parameter sensors at the three vertices of the equilateral triangle. The side length of the equilateral triangle is Where r0 is the monitoring range radius of the smoke parameter sensor.

[0045] Specifically, Figure 2 As shown, in the embodiment of the present invention, the total height of the underground oil cavern is 20m, the bottom width is 20m, the radius R of the arched part of the face is 10m, and there are 14 circular areas with a radius of 4.44m.

[0046] Furthermore, the smoke parameter sensors in each preset monitoring area are connected to a real-time data transmission system, which transmits the dust concentration and particle size, toxic and harmful gas concentration, type and wind speed data in different preset monitoring areas and the sensor location coordinate information in the area to the monitoring system in real time.

[0047] Preferably, the smoke parameter sensor includes a dust monitoring sensor, a toxic and harmful gas monitoring sensor, and a wind speed monitoring sensor; the smoke parameters include: dust concentration and dust particle size, toxic and harmful gas concentration, toxic and harmful gas type, and wind speed data in each preset monitoring area.

[0048] Specifically, step S106 also includes the following steps:

[0049] Step S1061, based on the smoke parameters, a real-time monitoring model for the spatiotemporal changes of dust and smoke concentrations in the three-dimensional space between the tunnel face and the charging trolley is established.

[0050] Step S1062, constructing multiple monitoring indicators based on smoke parameters; the monitoring indicators include wind speed, dust concentration, dust particle size, and toxic and harmful gas concentration.

[0051] Step S1063, recording the time variation curve of the monitoring indicators of each preset monitoring area, analyzing the time variation law of the monitoring indicators of different preset monitoring areas, and obtaining the time-space migration law.

[0052] Specifically, step S108 also includes the following steps:

[0053] Step S1081, determining the preset monitoring area where the monitoring index exceeds the preset safety threshold as the effective area that needs to be covered by the smoke control spray.

[0054] Specifically, safety values ​​of dust and harmful gas concentrations are set in different preset monitoring areas, and areas above the safety values ​​are determined based on monitoring indicators as effective areas to be covered by the spray for smoke control.

[0055] Step S1082, approximate the tunnel section of the large-section underground oil storage cavern as an arch, approximate the space covered by the spray from the nozzle at one position to the face as a cone, approximate the range covered by the spray in the middle of the tunnel section as a circle, and calculate the minimum coverage radius of the section where the spray reaches the effective area.

[0056] The calculation formula for the minimum coverage radius of the cross section where the spray reaches the effective area includes:

[0057] r 1min =d1tanβ

[0058] Among them, r 1min is the minimum coverage radius of the cross section of the spray reaching the effective area; d1 is the distance between the charging trolley and the closest cross section to the effective area; β is the maximum elevation angle of the nozzle to generate the spray.

[0059] Step S1083, determining the number of nozzles required to cover the entire tunnel cross section and the coverage position coordinates on the tunnel cross section according to the equilateral triangle rule.

[0060] Figure 3 FIG. 1 is a schematic diagram of determining the number of nozzles required to cover the tunnel interface using an equilateral triangle rule provided by an embodiment of the present invention. Figure 3 As shown, let the minimum coverage radius r 1max =3m, then the number of nozzles required is determined to be 16.

[0061] After step S108, the method provided by the embodiment of the present invention further includes: controlling the spray device to spray smoke control spray into the blasting area based on the effective area and the spray path.

[0062] Among them, the calculation formula for the nozzle water supply pressure of the spray device includes:

[0063]

[0064] Among them, d2 is the farthest distance from the nozzle to the tunnel section covered by the spray; r2 is the maximum coverage radius of the spray to the effective area section to be covered; c 2max To obtain the maximum concentration within the coverage range of each nozzle on different tunnel sections based on the monitoring data of the preset monitoring area; d0 is the average value of the dust particle size in the preset monitoring area; η is the spray dust removal efficiency; t0 is the total time of spray dust removal; t is the instantaneous time of spray dust removal; K is the shape coefficient of the nozzle mouth; p is the water supply pressure of the nozzle; v0 is the flow rate at the nozzle mouth.

[0065] Embodiment 2

[0066] Figure 4 Schematic diagram of a large-section underground oil storage cavern blasting smoke and dust prevention system provided according to an embodiment of the present invention, the system is applied to the blasting area in the large-section underground oil storage cavern. Figure 4 As shown, the system includes: a smoke parameter sensor 10, a data monitoring module 20 and a spray device 30. The smoke parameter sensor 10 is arranged in a plurality of preset monitoring areas between the charging trolley and the tunnel face in the blasting area, and the spray device 30 is arranged on the charging trolley to form a spray charging integrated trolley.

[0067] Specifically, the smoke parameter sensor 10 is used to obtain smoke parameters of multiple preset monitoring areas after blasting;

[0068] The data monitoring module 20 is used to determine the temporal and spatial migration law of excavation blasting dust and smoke in the blasting area based on smoke parameters;

[0069] The data monitoring module 20 is also used to determine the effective area and spray path that the smoke control spray needs to cover based on the temporal and spatial migration law;

[0070] The spray device 30 is used to spray smoke and dust control spray into the blasting area based on the effective area and the spray path.

[0071] Specifically, the nozzle direction, nozzle position and nozzle quantity of the spray device 30 are determined based on the effective area and the spray path; including:

[0072] According to the number of nozzles required to cover the entire tunnel section of the large-section underground oil storage cavern, nozzles are arranged at equal distances and heights on both sides of the charging trolley and the middle support frame, so that each spray coverage area on the tunnel section corresponds to the nozzle closest to the charging trolley one by one, and each corresponding nozzle is responsible for each spray coverage area, forming a spray system;

[0073] Determine the spray coverage range involved according to the effective area to be covered by the spray, and only activate the corresponding nozzles;

[0074] The spray direction of each nozzle is calculated according to the corresponding coverage position coordinates on the tunnel section;

[0075] The water supply pressure of each nozzle is calculated based on the monitoring data of the preset monitoring area, and the start-up and pressure supply of the nozzle are automatically controlled in real time to form a pressure system.

[0076] From the above description, it can be seen that the embodiment of the present invention provides a method and system for preventing and controlling smoke and dust from blasting in a large-section underground oil storage cavern. Dust, toxic and harmful gas and wind speed monitoring sensors are arranged at different spatial positions between the charging trolley and the face by a specific method, the spatiotemporal distribution data related to dust is obtained, and the nozzle spray path and pressure are adjusted in a linked manner to achieve full coverage and high-efficiency smoke and dust prevention. The method and system also realize the integration of the smoke and dust prevention nozzle and the charging trolley, laying a foundation for preventing and controlling smoke and dust from blasting in a large-section underground oil storage cavern.

[0077] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0078] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0079] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described equipment, devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0080] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0081] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0082] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0083] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for preventing and controlling blasting smoke and dust from a large-section underground petroleum storage cavern, characterized in that: Applied to the blasting area in a large-section underground petroleum storage cavern; the method comprises: Smoke parameter sensors are arranged in a plurality of preset monitoring areas between the charging trolley and the tunnel face in the blasting area; Based on the smoke parameter sensor, obtaining smoke parameters of the plurality of preset monitoring areas after blasting; Based on the smoke parameters, determining the temporal and spatial migration patterns of excavation blasting dust and smoke in the blasting area; Based on the temporal and spatial migration law, the effective area and injection path that the smoke control spray needs to cover are determined.

2. The method according to claim 1, characterized in that The preset monitoring area includes: taking four equal points on a straight line at a preset height above the bottom edge of the arched part of the tunnel face, taking eight equal points on the arc edge after the tunnel face is divided by the straight line, and taking points at intervals as the center of the circle to divide the circular range; calculating the initial radius of the circular range based on an initial radius calculation formula; wherein the initial radius calculation formula includes: Wherein, R is the radius of the tunnel face, r is the initial radius; If the initial radius is less than or equal to the maximum monitoring radius of the smoke parameter sensor, the center of the circular range is used as the monitoring point and the circular range is used as the preset monitoring area; If the initial radius is larger than the maximum monitoring radius of the smoke parameter sensor, the circular range is further divided into circular sub-ranges by using an equilateral triangle arrangement of sensors until the radius of the circular sub-range is less than or equal to the maximum detection radius of the smoke parameter sensor, and the circular sub-range is used as the preset monitoring area.

3. The method according to claim 1, characterized in that The smoke parameter sensors include dust monitoring sensors, toxic and harmful gas monitoring sensors, and wind speed monitoring sensors; The smoke parameters include: dust concentration and dust particle size, toxic and harmful gas concentration, toxic and harmful gas types, and wind speed data in each preset monitoring area.

4. The method according to claim 3, characterized in that Based on the smoke parameters, determining the temporal and spatial migration law of the excavation blasting dust and smoke in the blasting area includes: Based on the smoke parameters, a real-time monitoring model for the spatiotemporal changes of dust and smoke concentrations in the three-dimensional space between the tunnel face and the charging trolley is established; Based on the smoke parameters, multiple monitoring indicators are constructed; the monitoring indicators include wind speed, dust concentration, dust particle size, and toxic and harmful gas concentration; The monitoring index variation curve of each preset monitoring area is recorded, and the time variation law of the monitoring index of different preset monitoring areas is analyzed to obtain the said spatiotemporal migration law.

5. The method according to claim 4, characterized in that Based on the temporal and spatial migration law, the effective area and injection path that the smoke control spray needs to cover are determined, including: Determine the preset monitoring area where the monitoring index exceeds the preset safety threshold as the effective area that needs to be covered by the smoke and dust control spray; The tunnel section of the large-section underground oil storage cavern is approximated as an arch, the space covered by the spray from a nozzle at one position to the tunnel face is approximated as a cone, the range covered by the spray in the middle of the tunnel section is approximated as a circle, and the minimum coverage radius of the cross section of the spray reaching the effective area is calculated; According to the equilateral triangle rule, the number of nozzles required to cover the entire tunnel section and the coverage position coordinates on the tunnel section are determined.

6. The method according to claim 5, characterized in that The calculation formula for the minimum coverage radius of the cross section of the effective area reached by the spray includes: r 1min sd1tanβ Among them, r 1min is the minimum coverage radius of the cross section of the spray reaching the effective area; d1 is the distance between the charging trolley and the closest cross section reaching the effective area; β is the maximum elevation angle of the nozzle to generate the spray.

7. The method according to claim 1, characterized in that The method further includes: controlling a spray device to spray smoke control spray toward the blasting area based on the effective area and the spray path.

8. The method according to claim 7, characterized in that The calculation formula for the nozzle water supply pressure of the spray device includes: Among them, d2 is the farthest distance from the nozzle to the tunnel section covered by the spray; r2 is the maximum coverage radius of the spray to the effective area section to be covered; c 2max To obtain the maximum concentration within the coverage range of each nozzle on different tunnel sections based on the monitoring data of the preset monitoring area; d0 is the average value of the dust particle size in the preset monitoring area; η is the spray dust removal efficiency; t0 is the total time of spray dust removal; t is the instantaneous time of spray dust removal; K is the shape coefficient of the nozzle mouth; p is the water supply pressure of the nozzle; v0 is the flow rate at the nozzle mouth.

9. A large-section underground petroleum storage cavern blasting smoke and dust prevention system, characterized in that: Applicable to the blasting area in the underground oil storage cavern with a large cross section; comprising: a smoke parameter sensor, a data monitoring module and a spray device; wherein the smoke parameter sensor is arranged in a plurality of preset monitoring areas between the charging trolley and the tunnel face in the blasting area, and the spray device is arranged on the charging trolley to form a spray charging integrated trolley; The smoke parameter sensor is used to obtain the smoke parameters of the plurality of preset monitoring areas after blasting; The data monitoring module is used to determine the temporal and spatial migration law of excavation blasting dust and smoke in the blasting area based on the smoke parameters; The data monitoring module is further used to determine the effective area and spray path that the smoke control spray needs to cover based on the spatiotemporal migration law; The spray device is used to spray smoke and dust control spray into the blasting area based on the effective area and the spray path.

10. The system according to claim 9, characterized in that The nozzle direction, nozzle position and nozzle quantity of the spray device are determined based on the effective area and the spray path; including: According to the number of nozzles required to cover the entire tunnel section of the large-section underground oil storage cavern, nozzles are arranged at equal distances and heights on both sides of the charging trolley and the middle support frame, so that each spray coverage area on the tunnel section corresponds to the nozzle closest to the charging trolley one by one, and each spray coverage area is covered by each corresponding nozzle, forming a spray system; Determine the spray coverage range involved according to the effective area to be covered by the spray, and only activate the corresponding nozzles; The spray direction of each nozzle is calculated according to the corresponding coverage position coordinates on the tunnel section; The water supply pressure of each nozzle is calculated based on the monitoring data of the preset monitoring area, and the startup and pressure supply of the nozzle are automatically controlled in real time to form a pressure system.

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