CN111103221A - Detection method and detection system for dust space-time distribution of fully mechanized coal mining face of coal mine - Google Patents
Detection method and detection system for dust space-time distribution of fully mechanized coal mining face of coal mine Download PDFInfo
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- 239000000428 dust Substances 0.000 title claims abstract description 225
- 238000005065 mining Methods 0.000 title claims abstract description 180
- 239000003245 coal Substances 0.000 title claims abstract description 68
- 238000001514 detection method Methods 0.000 title claims abstract description 21
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Abstract
The invention provides a detection method and a detection system for the time-space distribution of dust on a fully mechanized coal mining face, wherein the method comprises the following steps: setting a mine dust sampler at each measuring point, starting the mine dust sampler at the most upstream measuring point to collect the dust of the measuring point according to the wind direction in the fully mechanized mining surface after the sampling is started, and starting the mine dust samplers at subsequent measuring points in sequence according to the wind direction in the fully mechanized mining surface to collect the dust of the measuring point; after sampling is finished, taking out the filter membrane in each mining dust sampling device, obtaining the current quality of each filter membrane, and obtaining the quality change value of each filter membrane according to the current quality and the initial quality of each filter membrane; further obtaining the corresponding relation between the dust concentration and the time of each measuring point in the current sampling period; and repeating the steps to obtain the relation of the dust concentration of each measuring point along with the change of time, and further obtaining the dust space-time distribution result of the fully mechanized coal mining face. By the scheme, the evolution rule of the dust concentration at any position in the fully mechanized coal mining face along with time can be obtained.
Description
Technical Field
The invention relates to the technical field of dust concentration detection, in particular to a method and a system for detecting the time-space distribution of dust on a fully mechanized coal mining face of a coal mine.
Background
Coal resources are important energy sources of all countries all the time, particularly the only strategic energy sources which can be relied on and controlled in China at present, the mechanization degree of coal mining is higher and higher, the amount of generated dust is increased, and particularly, a comprehensive mechanical coal mining surface, referred to as a fully mechanized coal mining surface, is one of main sources of coal mine dust. On one hand, the working environment polluted by coal dust seriously harms the physical health of workers, and long-term dust inhalation can cause lung lesion to cause pneumoconiosis; on the other hand, the safety performance of the coal mining machinery is affected by the over-high concentration of the dust, and a large amount of suspended dust is also one of the main causes of dust explosion of the coal mine. With the continuous expansion of the production scale of coal mines in China, the problems of potential dust safety hazards and occupational health become more serious. The environment under the mine is complicated, and there is huge difficulty in developing of dust fall work, through accurately surveying the comprehensive face dust concentration of adopting, helps realizing carrying out comprehensive grasp to the comprehensive face dust concentration distribution of adopting. And then, the particle size and the spray amount of the dust fall spray are determined by analyzing the generation and migration rules of the coal dust on the fully mechanized coal mining face, and the optimal spray position is found, so that the purpose of high-efficiency dust fall is achieved, the life health of workers is ensured, and the occurrence of accidents is prevented.
According to the requirements of the latest edition of national coal mine safety regulations, measuring dust in the air of a working place: the detection of the coal dust concentration of the fully mechanized mining surface is to utilize a dust concentration sampler to sample and measure the dust concentration at a position 10m-15m away from the return air side of the fully mechanized mining surface coal mining machine, a driver working place, a transfer point return air lane 5m-10m away from the return air side of the fully mechanized mining surface coal mining machine, and a position 15m-20m away from the working surface end of the return air lane. The sampling method can reflect the dust concentration condition of a sampling point, but cannot reflect the migration evolution law of dust on the fully mechanized mining surface, the characteristics of time-space uneven distribution of the dust on the fully mechanized mining surface are difficult to judge, and the inventor finds that the problems are mainly caused by the following reasons in the process of realizing the invention:
(1) the existing sampling is the arrangement of selecting a sampling point on a cross section along the wind flow direction, and the characteristic of non-uniformity of dust on the cross section in space is difficult to reflect;
(2) along the wind flow direction, the data acquired by sampling points with different distances are not in space-time correlation, and the acquired sampling data only reflect the average concentration of dust at the measuring position and cannot reflect the diffusion evolution condition of the dust along with the wind flow in the fully mechanized mining working face.
Therefore, the dust concentration data of the fully mechanized mining face obtained according to the existing measuring method has considerable limitation, and can only help workers to know the dust concentration at a specific position of the fully mechanized mining face at a specific time to a certain extent, the time-space distribution condition of dust on the fully mechanized mining face cannot be reflected, and the diffusion, derivation and migration rules of dust on the fully mechanized mining face under the actions of gravity, wind current and the like cannot be inverted. Based on this, there is a need for improvement of the dust monitoring method in the prior art.
Disclosure of Invention
The invention aims to provide a method and a system for detecting the time-space distribution of dust on a fully mechanized mining surface of a coal mine, which solve the technical problem that the dust detection method in the prior art has limitation.
Therefore, the invention provides a method for detecting the dust space-time distribution of a fully mechanized mining surface of a coal mine, which comprises the following steps:
a: selecting a plurality of filter membranes to obtain the initial mass of each filter membrane, and respectively arranging each filter membrane in different dust samplers after configuring a specific number to obtain a plurality of mining dust samplers;
b: selecting a plurality of measuring points along the length direction of the fully mechanized mining surface, arranging a mining dust sampler at each measuring point, and recording the corresponding relation between the specific number of each filter membrane and the measuring point where the filter membrane is located;
c: after sampling is started, according to the wind direction in the fully mechanized mining surface, firstly starting a mine dust sampler at the most upstream measuring point to collect the dust of the measuring point, and then starting mine dust samplers at subsequent measuring points in sequence according to the wind direction of the fully mechanized mining surface to collect the dust of the measuring point;
d: after sampling is finished, taking out the filter membrane in each mining dust sampling device, obtaining the current quality of each filter membrane, and obtaining the quality change value of each filter membrane according to the current quality and the initial quality of each filter membrane;
e: obtaining the corresponding relation between the dust concentration and the time of each measuring point in the current sampling period according to the sampling duration, the corresponding relation between the specific number of each filter membrane and the measuring point where the filter membrane is located and the mass change value of each filter membrane;
f: and repeating the steps A-E to obtain the relation of the dust concentration of each measuring point along with the change of time, and further obtaining the dust space-time distribution result of the fully mechanized coal mining face.
Optionally, in the method for detecting the time-space distribution of the dust on the fully mechanized coal mining face of the coal mine, the method comprises the following steps:
in step B: the device comprises a fully mechanized mining face crusher, at least one group of mining dust samplers and at least one group of mining dust samplers, wherein the at least one group of mining dust samplers are arranged at a transfer point of the fully mechanized mining face crusher;
in step C: firstly, a mining dust sampler positioned at the transfer point of the fully mechanized face crusher is started.
Optionally, in the method for detecting the time-space distribution of the dust on the fully mechanized coal mining face of the coal mine, the method comprises the following steps:
in step B: at least one group of mining dust samplers are arranged at the position 5m-10m away from the return air side of a transfer point of the fully-mechanized face crusher, at least two groups of mining dust samplers are arranged in front of the fully-mechanized face coal mining machine, at least two groups of mining dust samplers are arranged behind the fully-mechanized face coal mining machine, and at least one group of mining dust samplers are arranged at the position 15m-20m away from the end of a fully-mechanized face return air roadway from a working face; the spacing distances between the mining dust samplers positioned in front of and behind the fully mechanized face coal mining machine are equal.
Optionally, in the method for detecting the time-space distribution of the dust on the fully mechanized coal mining face of the coal mine, the method comprises the following steps:
in step C: and determining the starting time intervals of different mining dust samplers according to the fully mechanized mining surface wind speed and the distances among different measuring points, and sequentially starting the mining dust samplers at the subsequent measuring points according to the starting time intervals to collect the dust of the measuring points.
Optionally, in the method for detecting the time-space distribution of the dust on the fully mechanized coal mining face of the coal mine, the method comprises the following steps:
starting interval t between adjacent mine dust samplersni＝lniV, n ═ 1,2,3 …; wherein t isniThe time interval between the opening time of the nth mining dust sampler and the opening time of the ith mining dust sampler is obtained; lniThe spacing distance between the nth mining dust sampler and the ith mining dust sampler is shown, and v is the wind speed of the fully mechanized mining face.
Optionally, in the method for detecting the time-space distribution of the dust on the fully mechanized coal mining face of the coal mine, the method comprises the following steps:
in step a: the filter membrane selected is a blank filter membrane in a clean state.
Optionally, in the method for detecting the time-space distribution of the dust on the fully mechanized coal mining face of the coal mine, the method comprises the following steps:
and F, obtaining the relation between the dust concentration and the wind speed and distance according to the relation of the dust concentration of each measuring point along with the change of time, and further obtaining the relation of the dust concentration of any position of the fully mechanized mining surface along with the change of time to form a dust space-time distribution result of the fully mechanized mining surface.
The invention also provides a detection system for realizing the method for detecting the dust space-time distribution of the fully mechanized mining surface of the coal mine, which comprises a dust sampler, a balance, a filter membrane, an anemometer, a ranging rod and a controller; wherein:
the filter membrane is arranged in the dust sampler to obtain a mining dust sampler;
the balance is used for measuring the initial mass and the current mass of the filter membrane;
the anemometer is used for measuring the wind speed of the fully mechanized mining surface;
the ranging rod is used for measuring the distance between different mining dust samplers;
the controller is used for receiving the wind speed of the fully mechanized mining face and the distance between different mine dust samplers, and sequentially starting the mine dust samplers on different measuring points according to a preset sampling period;
the controller is also used for receiving the dust concentration change relation of each measuring point along with the time to generate a fully mechanized mining surface dust concentration space-time distribution graph.
Optionally, in the above detection system, the dust sampler includes a telescopic rod and a sampling portion, wherein:
the telescopic rod comprises a plurality of sections of tube bodies which are connected in a nested manner, and an elastic clamping part is arranged between every two adjacent tube bodies;
the sampling portion set up in the top of telescopic link, the sampling portion includes the filter membrane holder, the filter membrane holder includes relative first frame and the second frame that sets up, and connects through the elastic component between first frame and the second frame, the filter membrane set up in first frame with obtain between the second frame mining dust sampler.
Optionally, in the above detection system, the sampling unit further includes:
the shell is used for packaging the filter membrane clamping part and the filter membrane in the shell; the shell is provided with an electric control opening and closing part, the controlled end of the electric control opening and closing part is connected with the output end of the controller, and when the controller controls the electric control opening and closing part to be opened, the filter membrane is exposed outside, and then the mining dust sampler starts sampling.
Compared with the prior art, the technical scheme provided by the invention at least has the following beneficial effects:
the coal mine fully-mechanized mining surface dust spatial-temporal distribution detection method and the detection system provided by the invention can measure the dust concentrations which are temporally and spatially related at different positions on a section perpendicular to the wind flow direction on the fully-mechanized mining surface and at different positions along with the wind flow direction, can reflect the spatial-temporal evolution rule of dust diffusion on the whole fully-mechanized mining surface, and can obtain the rule of dust concentration evolution along with time at any position by combining three-dimensional numerical simulation. Therefore, scientific and reliable data support is provided for knowing and mastering the generation rule, the transportation rule, the sedimentation rule and the distribution rule of the dust on the fully mechanized coal mining face, namely the space-time distribution of the dust on the fully mechanized coal mining face.
Drawings
FIG. 1 is a flow chart of a method for detecting the spatial-temporal distribution of dust on a fully mechanized coal mining face of a coal mine according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a mining sampler according to an embodiment of the present invention.
Wherein the reference numerals have the meanings indicated:
1-plug, 2-antiskid handle, 3-telescopic rod, 4-rod sleeve, 5-connector and 6-sampling part.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment provides a method for detecting the dust space-time distribution of a fully mechanized coal mining face, as shown in fig. 1, the method comprises the following steps:
a: selecting a plurality of filter membranes to obtain the initial mass of each filter membrane, and respectively arranging each filter membrane in different dust samplers after configuring a specific number to obtain a plurality of mining dust samplers; preferably, the filter membrane can be selected as a completely new blank filter membrane, and the number of the filter membranes can be selected to be 6 or more. Wherein, the specific number is not specially limited, and can be selected from numbers, letters and the like, such as: a. b, c, d, e, f … ….
B: selecting a plurality of measuring points along the length direction of the fully mechanized mining surface, arranging a mining dust sampler at each measuring point, and recording the corresponding relation between the specific number of each filter membrane and the measuring point where the filter membrane is located; where the position of the measuring point needs to cover a number of points on a plane perpendicular to the direction of the wind flow. For example, a plurality of measuring point regions may be selected along the wind flow direction, each measuring point region is a plane perpendicular to the wind flow direction, and a plurality of measuring points may be selected in each measuring point region.
C: after sampling is started, according to the wind direction in the fully mechanized mining surface, firstly starting a mine dust sampler at the most upstream measuring point to collect the dust of the measuring point, and then starting mine dust samplers at subsequent measuring points in sequence according to the wind direction of the fully mechanized mining surface to collect the dust of the measuring point; under normal conditions, dust can diffuse along the wind direction along with wind flow, so the approximate position to which the dust diffuses can be estimated according to data such as wind speed and distance, and when the estimated dust diffusion position is close to a certain mining dust sampler, the mining dust sampler can be started to collect the dust concentration of a measuring point.
D: after sampling is finished, taking out the filter membrane in each mining dust sampling device, obtaining the current quality of each filter membrane, and obtaining the quality change value of each filter membrane according to the current quality and the initial quality of each filter membrane; since the filter membrane is already coated with dust during the sampling process, the difference between the mass of the filter membrane at this time and the initial mass of the filter membrane can be regarded as the mass of dust collected during the sampling process.
E: and obtaining the corresponding relation between the dust concentration and the time of each measuring point in the current sampling period according to the sampling duration, the corresponding relation between the specific number of each filter membrane and the measuring point where the filter membrane is located and the mass change value of each filter membrane. Since the setting position of each filter membrane is determined, the number of each filter membrane is determined, and the quality of the collected dust of each filter membrane is also determined, the dust amount in the sampling period at each measuring point can be further determined, preferably, if a more accurate result is obtained, the dust concentration can be further determined by combining the area of the filter membrane, that is, the plane distribution of the dust on the surface of the filter membrane can be determined by dividing the dust amount adsorbed on the filter membrane by the area of the filter membrane.
F: and repeating the steps A-E to obtain the relation of the dust concentration of each measuring point along with the change of time, and further obtaining the dust space-time distribution result of the fully mechanized coal mining face.
The steps A-E can be set as a mode of measuring the dust concentration of the measuring points in one sampling period, so that the steps are repeated in each sampling period, the change rule of the dust concentration value of each measuring point along with the lapse of time can be obtained, the distribution condition of dust at each position in the fully mechanized coal mining surface can be further deduced, and the dust space-time distribution result of the fully mechanized coal mining surface is also obtained.
By adopting the scheme of the embodiment, the spatial distribution condition of the dust on the fully mechanized mining surface and the change condition of the dust concentration at different positions on the fully mechanized mining surface along with time can be obtained, the distribution rule, the diffusion rule and the evolution migration rule of the dust on the fully mechanized mining surface can be comprehensively mastered, and the method has higher safety and reliability in operation.
In the above scheme, in step B: the device comprises a fully mechanized mining face crusher, at least one group of mining dust samplers and at least one group of mining dust samplers, wherein the at least one group of mining dust samplers are arranged at a transfer point of the fully mechanized mining face crusher; in step C: firstly, a mining dust sampler positioned at the transfer point of the fully mechanized face crusher is started. According to the requirements of the latest edition of national coal mine safety regulations, measuring dust in the air of a working place: the detection of the coal dust concentration of the fully mechanized mining surface is to utilize a dust concentration sampler to sample and measure the dust concentration at a position 10m-15m away from the return air side of the fully mechanized mining surface coal mining machine, a driver working place, a transfer point return air lane 5m-10m away from the return air side of the fully mechanized mining surface coal mining machine, and a position 15m-20m away from the working surface end of the return air lane. Therefore, preferably, at least one group of mining dust samplers is arranged at the position 5m-10m away from the return air side of the transfer point of the fully-mechanized face crusher, at least two groups of mining dust samplers are arranged in front of the fully-mechanized face coal mining machine, at least two groups of mining dust samplers are arranged behind the fully-mechanized face coal mining machine, and at least one group of mining dust samplers is arranged at the position 15m-20m away from the end of the fully-mechanized face return air tunnel from the working face; the mining dust samplers positioned in front of and behind the fully mechanized face coal mining machine are equal in spacing distance, and if the fully mechanized face is long, the spacing between the front mining dust sampler and the rear mining dust sampler in the wind direction is 50 m. So that the measured result meets the actual requirement.
Further, in the above scheme, in step C: and determining the starting time intervals of different mining dust samplers according to the fully mechanized mining surface wind speed and the distances among different measuring points, and sequentially starting the mining dust samplers at the subsequent measuring points according to the starting time intervals to collect the dust of the measuring points. Specifically, the opening time intervals of different mining dust samplers are determined as follows, wherein:
starting interval t between adjacent mine dust samplersni＝lniV, n ═ 1,2,3 …; wherein t isniThe time interval between the opening time of the nth mining dust sampler and the opening time of the ith mining dust sampler is obtained; lniThe spacing distance between the nth mining dust sampler and the ith mining dust sampler is shown, and v is the wind speed of the fully mechanized mining face.
Through the scheme of this embodiment, can not only obtain the dust concentration of a certain point department on the full face hydraulic support passageway through measuring, can also invert the dust evolution law of whole space on the full face according to measured data.
Example 2
The embodiment also provides a detection system for realizing the method for detecting the dust space-time distribution of the fully mechanized mining face of the coal mine in any scheme of the embodiment 1, and the detection system comprises a dust sampler, a balance, a filter membrane, an anemometer, a ranging rod and a controller. The filter membrane is arranged in the dust sampler to obtain a mining dust sampler; the balance is used for measuring the initial mass and the current mass of the filter membrane; the anemometer is used for measuring the wind speed of the fully mechanized mining surface; the ranging rod is used for measuring the distance between different mining dust samplers; the controller is used for receiving the wind speed of the fully mechanized mining face and the distance between different mine dust samplers, and sequentially starting the mine dust samplers on different measuring points according to a preset sampling period; the controller is also used for receiving the dust concentration change relation of each measuring point along with the time to generate a fully mechanized mining surface dust concentration space-time distribution graph.
Further, as shown in fig. 2, the dust sampler comprises a telescopic rod and a sampling portion, wherein the telescopic rod 3 comprises a plurality of sections of tube bodies which are connected in a nested manner, and an elastic clamping portion is arranged between two adjacent rod sleeves 4; the sampling portion 6 set up in the top of telescopic link 3, sampling portion 3 includes the filter membrane holder, the filter membrane holder includes relative first frame and the second frame that sets up, and connects through the elastic component between first frame and the second frame, the filter membrane set up in first frame with obtain between the second frame mining dust sampler.
Preferably, the dust sampler in the above scheme further comprises a connector 5, and the sampler fixing device fixes the sampling part 6; secondly, the telescopic rod 3 is connected with the sampling part 6 by a connector 5; then, according to the dust test environment condition, extending the telescopic rod 3, and fixing the telescopic rod 3 by using a rod sleeve 4; and finally, setting sampling parameters of the sampling part, controlling the telescopic rod body 3, and placing the sampling part 6 in a spatial position point to be sampled by holding the anti-slip handle 2 for sampling.
The mining dust sampler can realize the sampling of the sampling part 6 on different spatial positions of the sampling environment, and has the advantages of small volume, simple and convenient operation, and convenient carrying and use by users. The technical scheme is as follows: the end part of the telescopic rod 3 is provided with a sampling part 6, and the device is convenient for the function control of the sampling part 6 and the filter membrane replacement of the sampling part 6 and is connected with the telescopic rod 3 through a connector 5. The telescopic rod 3 is formed by nesting a plurality of pipe bodies (more than or equal to 2 sections) with certain length, different diameters, light weight and high strength, and the pipe bodies with different diameters are connected by the rod sleeve 4. The rod sleeve 4 can prevent the small-diameter pipe body from being directly drawn out from the front end, so that the telescopic rod 3 can be fixed at any length, and can be switched between an extension state and a contraction state. The anti-slip handle 2 is arranged at the rear half part outside the telescopic rod 3 at the outermost side, so that a user can conveniently hold and prevent slipping. The rear end of the telescopic rod 3 at the outermost side is provided with a detachable plug 1 to seal the tube body, so that the inner small-diameter tube body is prevented from sliding off, and the integral consistency and attractiveness of the telescopic rod 3 are maintained. Through the length of pole cover 4 control and fixed telescopic link 3, the user can extend sampling portion 6 safely to the sampling space position that measurement personnel used to hold in the past and can't reach with the hand with this device and carry out dust sample collection.
Further preferably, in the above scheme, the sampling part 6 further comprises a housing, and the housing is used for packaging the filter membrane clamping part and the filter membrane inside; the shell is provided with an electric control opening and closing part, the controlled end of the electric control opening and closing part is connected with the output end of the controller, and when the controller controls the electric control opening and closing part to be opened, the filter membrane is exposed outside, and then the mining dust sampler starts sampling. The automatically controlled portion of opening and shutting can adopt the roll up curtain design, the upper end and the lower extreme of roll up the curtain all are fixed with the body of rod, the both ends of the body of rod on the top and the body of rod on the lower extreme all dispose gear portion, gear portion through the gear rack toothing connection upper end body of rod and the lower extreme body of rod, the gear portion of the lower extreme body of rod can with driving motor's output shaft, driving motor's output shaft rotates and can drive lower extreme body of rod gear revolve, lower extreme body of rod gear revolve can drive the rack and rotate and then drive the upper end body of rod and rotate, can realize from this that to roll up the curtain and remove the top. Whether the driving motor is turned on or not and the rotation direction of the driving motor may be controlled by the controller.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for detecting the dust space-time distribution of a fully mechanized mining surface of a coal mine is characterized by comprising the following steps:
a: selecting a plurality of filter membranes to obtain the initial mass of each filter membrane, and respectively arranging each filter membrane in different dust samplers after configuring a specific number to obtain a plurality of mining dust samplers;
b: selecting a plurality of measuring points along the length direction of the fully mechanized mining surface, arranging a mining dust sampler at each measuring point, and recording the corresponding relation between the specific number of each filter membrane and the measuring point where the filter membrane is located;
c: after sampling is started, according to the wind direction in the fully mechanized mining surface, firstly starting a mine dust sampler at the most upstream measuring point to collect the dust of the measuring point, and then starting mine dust samplers at subsequent measuring points in sequence according to the wind direction of the fully mechanized mining surface to collect the dust of the measuring point;
d: after sampling is finished, taking out the filter membrane in each mining dust sampling device, obtaining the current quality of each filter membrane, and obtaining the quality change value of each filter membrane according to the current quality and the initial quality of each filter membrane;
e: obtaining the corresponding relation between the dust concentration and the time of each measuring point in the current sampling period according to the sampling duration, the corresponding relation between the specific number of each filter membrane and the measuring point where the filter membrane is located and the mass change value of each filter membrane;
f: and repeating the steps A-E to obtain the relation of the dust concentration of each measuring point along with the change of time, and further obtaining the dust space-time distribution result of the fully mechanized coal mining face.
2. The method for detecting the dust space-time distribution of the fully mechanized mining face of the coal mine according to claim 1, wherein:
in step B: the device comprises a fully mechanized mining face crusher, at least one group of mining dust samplers and at least one group of mining dust samplers, wherein the at least one group of mining dust samplers are arranged at a transfer point of the fully mechanized mining face crusher;
in step C: firstly, a mining dust sampler positioned at the transfer point of the fully mechanized face crusher is started.
3. The method for detecting the dust space-time distribution of the fully mechanized mining face of the coal mine according to claim 2, wherein:
in step B: at least one group of mining dust samplers are arranged at the position 5m-10m away from the return air side of a transfer point of the fully-mechanized face crusher, at least two groups of mining dust samplers are arranged in front of the fully-mechanized face coal mining machine, at least two groups of mining dust samplers are arranged behind the fully-mechanized face coal mining machine, and at least one group of mining dust samplers are arranged at the position 15m-20m away from the end of a fully-mechanized face return air roadway from a working face; the spacing distances between the mining dust samplers positioned in front of and behind the fully mechanized face coal mining machine are equal.
4. The method for detecting the dust space-time distribution of the fully mechanized mining face of the coal mine according to claim 3, wherein:
in step C: and determining the starting time intervals of different mining dust samplers according to the fully mechanized mining surface wind speed and the distances among different measuring points, and sequentially starting the mining dust samplers at the subsequent measuring points according to the starting time intervals to collect the dust of the measuring points.
5. The method for detecting the dust space-time distribution of the fully mechanized mining face of the coal mine according to claim 4, wherein:
starting interval t between adjacent mine dust samplersni＝lniV, n ═ 1,2,3 …; wherein t isniThe time interval between the opening time of the nth mining dust sampler and the opening time of the ith mining dust sampler is obtained; lniThe spacing distance between the nth mining dust sampler and the ith mining dust sampler is shown, and v is the wind speed of the fully mechanized mining face.
6. The method for detecting the dust spatial-temporal distribution of the fully mechanized mining surfaces of the coal mines according to any one of claims 1 to 5, wherein:
in step a: the filter membrane selected is a blank filter membrane in a clean state.
7. The method for detecting the dust spatial-temporal distribution of the fully mechanized mining surfaces of the coal mines according to any one of claims 1 to 5, wherein:
and F, obtaining the relation between the dust concentration and the wind speed and distance according to the relation of the dust concentration of each measuring point along with the change of time, and further obtaining the relation of the dust concentration of any position of the fully mechanized mining surface along with the change of time to form a dust space-time distribution result of the fully mechanized mining surface.
8. A detection system for realizing the detection method of the dust space-time distribution of the fully mechanized mining face of the coal mine according to any one of claims 1 to 7 is characterized by comprising a dust sampler, a balance, a filter membrane, an anemometer and a ranging rod and a controller; wherein:
the filter membrane is arranged in the dust sampler to obtain a mining dust sampler;
the balance is used for measuring the initial mass and the current mass of the filter membrane;
the anemometer is used for measuring the wind speed of the fully mechanized mining surface;
the ranging rod is used for measuring the distance between different mining dust samplers;
the controller is used for receiving the wind speed of the fully mechanized mining face and the distance between different mine dust samplers, and sequentially starting the mine dust samplers on different measuring points according to a preset sampling period;
the controller is also used for receiving the dust concentration change relation of each measuring point along with the time to generate a fully mechanized mining surface dust concentration space-time distribution graph.
9. The detection system of claim 8, wherein the dust sampler comprises a telescoping rod and a sampling portion, wherein:
the telescopic rod comprises a plurality of sections of tube bodies which are connected in a nested manner, and an elastic clamping part is arranged between every two adjacent tube bodies;
the sampling portion set up in the top of telescopic link, the sampling portion includes the filter membrane holder, the filter membrane holder includes relative first frame and the second frame that sets up, and connects through the elastic component between first frame and the second frame, the filter membrane set up in first frame with obtain between the second frame mining dust sampler.
10. The detection system of claim 9, wherein the sampling portion further comprises:
the shell is used for packaging the filter membrane clamping part and the filter membrane in the shell; the shell is provided with an electric control opening and closing part, the controlled end of the electric control opening and closing part is connected with the output end of the controller, and when the controller controls the electric control opening and closing part to be opened, the filter membrane is exposed outside, and then the mining dust sampler starts sampling.
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