Working face corner gas prevention and control method and device under high-strength mining condition

Abstract

The embodiment of the invention provides a working face corner gas prevention and control method and device under the high-strength mining condition. The method comprises the steps that working face corner gas concentration data of a working face, the running state of a coal mining machine, internal and external spraying parameters of the coal mining machine and the air volume of the working face are obtained; constructing a working face corner gas concentration prediction model based on the working face corner gas concentration data, the operation state of the coal mining machine, the internal and external spraying parameters of the coal mining machine and the working face air volume; processing the working face corner gas concentration data, and predicting a corner gas concentration change trend based on a working face corner gas concentration prediction model to obtain a prediction result; and correspondingly adjusting the running state of the coal mining machine, the internal and external spraying parameters of the coal mining machine and the working face air volume based on the prediction result to obtain a corner gas prevention and control result.

Description

Technical Field

[0001] The present invention relates to the technical field of mine corner gas prevention and control, and in particular to but not limited to a method and device for preventing and controlling gas in a working face corner under high-intensity mining conditions. Background Art

[0002] Coal is the main energy source in my country and plays the role of "ballast stone" and "stabilizer" in my country's energy security. In recent years, with the gradual development of mining technology and the increase in demand for coal for economic development, the intensity of mine mining has gradually increased. Many low-gas mines have gradually transformed into high-gas mines, and high-gas mines are facing more severe gas control situations. Under high-intensity mining conditions, the intensity of gas outburst in the working face is high, the amount of gas outburst surges, local gas accumulation, return air flow, abnormal or even over-limit gas concentration in the upper corner, etc., which seriously affect the safe production of coal mines. Therefore, solving the problems of abnormal gas outburst in the fully-mechanized working face and excessive gas concentration in the upper corner is crucial to ensure safe and efficient production in coal mines.

[0003] The existing corner gas prevention and control technology has the following shortcomings: 1) The traditional perlite and crushed coal slag are used to block the corners, which takes a long time to block, the labor intensity of workers is high, and the work efficiency is low. It is not suitable for high-intensity mining in large mines. 2) During the gas extraction process, as the mining intensity increases, the gas outflow of the working face, the gas concentration in the goaf and the upper corner are in a dynamic change process. The existing prevention and control means are relatively single and lack comprehensive prevention and control methods. 3) The existing gas extraction system parameter adjustment and coal mining machine operation status adjustment mostly require manual adjustment, which increases the labor intensity of workers. It is a passive adjustment and cannot adjust the real-time status of each system in time. 4) The existing coal mining machine operation status adjustment is mostly passively adjusted based on the gas concentration data of the working face corner, and it is impossible to realize the interaction between the gas concentration information of the working face corner and the operating status of the coal mining machine, the corresponding parameters of the internal and external spray, and the working face air volume. It is impossible to adjust the coal mining machine back to the operating status, the corresponding parameters of the internal and external spray, and the working face air volume in real time according to the development trend of the gas concentration in the working face corner. Summary of the invention

[0004] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a method and device for preventing and controlling gas in the corners of a working face under high-intensity mining conditions.

[0005] The technical method of the embodiment of the present invention is implemented as follows:

[0006] In a first aspect, an embodiment of the present invention provides a method for preventing and controlling gas in corners of a working face under high-intensity mining conditions, the method comprising:

[0007] Obtain the working face corner gas concentration data, coal mining machine operation status, coal mining machine internal and external spray parameters, and working face air volume;

[0008] Based on the working face corner gas concentration data, the coal mining machine operating status, the coal mining machine internal and external spray parameters, and the working face air volume, a working face corner gas concentration prediction model is constructed;

[0009] Processing the working face corner gas concentration data, and predicting the corner gas concentration change trend based on the working face corner gas concentration prediction model to obtain a prediction result;

[0010] Based on the prediction results, the operating state of the coal mining machine, the internal and external spray parameters of the coal mining machine and the working face air volume are adjusted accordingly to obtain corner gas prevention and control results.

[0011] In a second aspect, an embodiment of the present invention provides a gas prevention and control device for a working face corner under high-intensity mining conditions, the device comprising:

[0012] An acquisition module is used to obtain the gas concentration data of the working face corners, the operating status of the coal mining machine, the internal and external spray parameters of the coal mining machine, and the air volume of the working face;

[0013] A construction module is used to construct a working face corner gas concentration prediction model based on the working face corner gas concentration data, the coal mining machine operation status, the coal mining machine internal and external spray parameters, and the working face air volume;

[0014] A prediction module, used to process the gas concentration data of the working surface corners, and predict the changing trend of the gas concentration of the corners based on the working surface corner gas concentration prediction model to obtain a prediction result;

[0015] An adjustment module is used to make corresponding adjustments to the operating state of the coal mining machine, the internal and external spray parameters of the coal mining machine, and the working face air volume based on the prediction results to obtain corner gas prevention and control results.

[0016] In some embodiments, the construction module is also used to take the operating status of the coal mining machine, the internal and external spray parameters of the coal mining machine and the working face air volume as influencing factors, and the working face corner gas concentration as the target prediction value, to construct a corner gas concentration prediction training data set; use the range normalization method to standardize the training data set to obtain a standardized training data set; divide the standardized training data set to obtain a training set and a verification set; train the prediction model of the training set through a preset algorithm, and compare the prediction error and fitting accuracy in the verification set to obtain the working face corner gas concentration prediction model.

[0017] In some embodiments, the adjustment module is also used to adjust the internal and external spray parameters of the coal mining machine when the prediction result meets the first preset condition; to adjust the internal and external spray parameters of the coal mining machine and the working face air volume when the prediction result meets the second preset condition; and to adjust the operating speed of the coal mining machine in the operating state, the internal and external spray parameters of the coal mining machine and the working face air volume when the prediction result meets the third preset condition.

[0018] In some embodiments, the working surface corner gas prevention and control method is applied to a corner gas prevention and control system, the system at least includes a corner rapid blocking airbag; the corner rapid blocking airbag is arranged at the working surface corner; the corner rapid blocking airbag includes an airbag body, an inflation tube, a connecting tube, a pressure gauge, a safety valve and a pressure relief valve; a telescopic skeleton is provided in the airbag body so that the two relative surfaces of the airbag body can adapt to the corner section, the airbag body includes an inner liner, an outer liner and a sponge filling body filled between the inner liner and the outer liner; the outer liner and the inner liner are made of retractable double-anti-coated cloth; a reinforcement layer made of anti-static and flame-retardant soft PVC material is provided on the outer liner; the inflation tube passes through the outer liner and is connected to the inner liner, and the safety valve, the pressure relief valve and the pressure gauge are provided on the inflation tube, the connecting tube is connected to the inflation tube, and fills the internal space of the airbag body so that it adapts to the corner section to form an air wall seal.

[0019] In some embodiments, the system also includes: a corner gas concentration monitoring component, and the corner gas concentration detection component is arranged at the corner of the working face; the corner gas concentration monitoring component includes a gas concentration sensor, an underground substation, and a ground monitoring platform; the gas concentration sensor collects the gas concentration data of the working face corner and generates a gas concentration signal; the gas concentration signal is transmitted to the underground substation; after the underground substation processes the gas data of the working face corner and predicts the trend of the change of the corner gas concentration, it adjusts the operating status of the coal mining machine, the internal and external spray parameters of the coal mining machine, and the working face air volume to obtain adjusted real-time data; the adjusted real-time data is transmitted to the ground monitoring platform; the ground monitoring platform is used to display the real-time corner gas concentration data, the trend and prediction results of the corner gas concentration change, the operating status of the coal mining machine, and the internal and external spray parameters of the coal mining machine.

[0020] In some embodiments, the system also includes: a coal mining machine component; the coal mining machine component includes a coal mining machine drum and internal and external spray of the coal mining machine; the data feedback from the gas concentration sensor is received through the corner gas concentration monitoring component; and the trend of changes in the corner gas concentration is predicted, and a command signal is output to the coal mining machine control unit; the coal mining machine control unit receives the command signal, and optimizes and adjusts the operating status of the coal mining machine and the internal and external spray parameters of the coal mining machine to ensure that the corner gas concentration is not exceeded and maximizes the production efficiency of the working face.

[0021] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory for storing executable instructions; and a processor for executing the executable instructions stored in the memory to implement the above-mentioned method for gas prevention and control in corners of a working face under high-intensity mining conditions.

[0022] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium that stores executable instructions for causing a processor to execute the executable instructions to implement the above-mentioned method for gas prevention and control in the corners of a working face under high-intensity mining conditions.

[0023] The embodiment of the present invention provides a method and device for preventing and controlling gas in the corners of a working face under high-intensity mining conditions, which obtains data on gas concentration in the corners of the working face, the operating status of a coal mining machine, internal and external spray parameters of the coal mining machine, and the air volume of the working face; a prediction model for gas concentration in the corners of the working face is constructed based on the gas concentration data in the corners of the working face, the operating status of the coal mining machine, internal and external spray parameters of the coal mining machine, and the air volume of the working face; the gas concentration data in the corners of the working face is processed, and based on the prediction model for gas concentration in the corners of the working face, a prediction trend of gas concentration in the corners is predicted to obtain a prediction result; based on the prediction result, the operating status of the coal mining machine, internal and external spray parameters of the coal mining machine, and the air volume of the working face are adjusted accordingly to obtain a result of preventing and controlling gas in the corners. Thus, compared with the prior art, the method provided by the present invention, on the one hand, improves the compactness of corner sealing by sealing the corners with corner air bags, reduces the gas outburst in the goaf and the engineering workload of corner sealing operations; on the other hand, by constructing a corner gas concentration prediction model, it realizes the dynamic prediction of the development trend of corner gas concentration in the coal mine production process, and reduces the accident rate of excessive corner gas concentration in the mine; thirdly, by constructing a gas concentration prediction model, it solves the problem of single prevention and control measures in the previous production process, and dynamically and linkage-controls the operating status of the coal mining machine, the spray parameters inside and outside the coal mining machine, and the working face air volume, so as to achieve a dynamic balance between maximizing coal mining efficiency and corner gas prevention and control.

[0024] In addition, the prevention and control method provided by the present invention can link prevention and control to reduce the concentration of corner gas, improve the intelligence level of corner gas prevention and control, and promote the development of corner gas prevention and control in comprehensive mining working faces from "few people" to "unmanned", thereby reducing the labor intensity of workers and maximizing the coal mining efficiency of mines, thereby providing technical guarantee for the safe and efficient production of coal mining enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of a method for preventing and controlling gas in corners of a working face under high-intensity mining conditions provided by an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of a working face corner gas concentration prediction model provided by an embodiment of the present invention;

[0027] Figure 3 It is a flow chart of a method for preventing and controlling gas in a corner of a fully mechanized mining face provided by an embodiment of the present invention;

[0028] Figure 4 It is a structural schematic diagram of a working face corner gas linkage control system provided by an embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the composition structure of a gas prevention and control device for a working face corner under high-intensity mining conditions provided by an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the composition structure of the working face corner gas prevention and control equipment under high-intensity mining conditions provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0032] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. Unless otherwise defined, all technical and scientific terms used in the embodiments of the present invention have the same meaning as those commonly understood by those skilled in the art to which the embodiments of the present invention pertain. The terms used in the embodiments of the present invention are only for the purpose of describing the embodiments of the present invention and are not intended to limit the present invention.

[0033] The following describes an exemplary application of the gas prevention and control equipment for working face corners under high-intensity mining conditions in an embodiment of the present invention. The gas prevention and control equipment for working face corners under high-intensity mining conditions provided by the embodiment of the present invention can be implemented as a terminal or a server. In one implementation, the gas prevention and control equipment for working face corners under high-intensity mining conditions provided by the embodiment of the present invention can be implemented as various types of terminals such as laptops, tablet computers, desktop computers, and mobile devices; in another implementation, the gas prevention and control equipment for working face corners under high-intensity mining conditions provided by the embodiment of the present invention can also be implemented as a server, wherein the server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution networks (CD N, Content Delivery Network), and big data and artificial intelligence platforms. The terminal and the server can be directly or indirectly connected via wired or wireless communication, which is not limited in the embodiment of the present invention. The following describes an exemplary application of the gas prevention and control equipment for working face corners under high-intensity mining conditions when it is implemented as a server.

[0034] The embodiment of the present invention provides a method for preventing and controlling gas in corners of a working face under high-intensity mining conditions. Figure 1 , Figure 1 This is a flow chart of a method for preventing and controlling gas in corners of a working face under high-intensity mining conditions provided by an embodiment of the present invention. Figure 1 The steps shown are explained.

[0035] Step S110, obtaining the working face corner gas concentration data, the coal mining machine operation status, the coal mining machine internal and external spray parameters, and the working face air volume.

[0036] It should be noted that high-intensity mining refers to the process in which a large amount of gas is generated in the working face due to factors such as high mining intensity, thick coal seams or fast mining speed, which increases the difficulty of gas prevention and control. In the working face, corners usually refer to the corners of the working face. Due to the influence of factors such as wind flow and gas release, gas accumulation is prone to occur in this area.

[0037] In some embodiments, the working face corner gas concentration data refers to the gas content in the working face corner area during coal mining.

[0038] In some embodiments, the operating status of the coal mining machine refers to various parameters of the coal mining machine during operation, such as operating speed, cutting depth, motor power, etc. These parameters directly affect the coal mining efficiency and gas release.

[0039] In some embodiments, the coal mining machine is usually equipped with an internal and external spray system to reduce the dust and gas concentration generated during the coal mining process. The internal spray is directed to spray water inside the cutting drum, and the external spray is directed to spray water outside the drum and the surrounding space. The spray parameters include spray pressure, flow rate, etc.

[0040] In some embodiments, the work surface air volume refers to the air flow rate passing through the work surface.

[0041] Step S120, constructing a working face corner gas concentration prediction model based on the working face corner gas concentration data, the coal mining machine operating status, the coal mining machine internal and external spray parameters, and the working face air volume.

[0042] In an embodiment of the present invention, based on the above acquired data, a prediction model for gas concentration in the corner of the working face is constructed using a machine learning or deep learning algorithm. The model can comprehensively consider the impact of the coal mining machine operating state, spray parameters and working face air volume on gas concentration, and predict the changing trend of corner gas concentration in the future.

[0043] Step S130, processing the working surface corner gas concentration data, and predicting the corner gas concentration change trend based on the working surface corner gas concentration prediction model to obtain a prediction result.

[0044] Step S140, based on the prediction result, the operating state of the coal mining machine, the internal and external spray parameters of the coal mining machine and the working face air volume are adjusted accordingly to obtain corner gas prevention and control results.

[0045] In the present invention, it is determined whether the operating state of the coal mining machine, the internal and external spray parameters or the working face air volume need to be adjusted according to the prediction results. If the prediction results show that the gas concentration has an upward trend, the gas concentration can be reduced by reducing the speed of the coal mining machine, increasing the spray pressure or flow, and increasing the working face air volume. By adjusting these parameters in real time, effective prevention and control of corner gas concentration can be achieved to ensure safe production in the mine.

[0046] The embodiment of the present invention provides a method and device for preventing and controlling gas in the corners of a working face under high-intensity mining conditions, which obtains data on gas concentration in the corners of the working face, the operating status of a coal mining machine, internal and external spray parameters of the coal mining machine, and the air volume of the working face; a prediction model for gas concentration in the corners of the working face is constructed based on the gas concentration data in the corners of the working face, the operating status of the coal mining machine, internal and external spray parameters of the coal mining machine, and the air volume of the working face; the gas concentration data in the corners of the working face is processed, and based on the prediction model for gas concentration in the corners of the working face, a prediction trend of gas concentration in the corners is predicted to obtain a prediction result; based on the prediction result, the operating status of the coal mining machine, internal and external spray parameters of the coal mining machine, and the air volume of the working face are adjusted accordingly to obtain a result of preventing and controlling gas in the corners. Thus, compared with the prior art, the method provided by the present invention, on the one hand, improves the compactness of corner sealing by sealing the corners with corner air bags, reduces the gas outburst in the goaf and the engineering workload of corner sealing operations; on the other hand, by constructing a corner gas concentration prediction model, it realizes the dynamic prediction of the development trend of corner gas concentration in the coal mine production process, and reduces the accident rate of excessive corner gas concentration in the mine; thirdly, by constructing a gas concentration prediction model, it solves the problem of single prevention and control measures in the previous production process, and dynamically and linkage-controls the operating status of the coal mining machine, the spray parameters inside and outside the coal mining machine, and the working face air volume, so as to achieve a dynamic balance between maximizing coal mining efficiency and corner gas prevention and control.

[0047] In addition, the prevention and control method provided by the present invention can link prevention and control to reduce the concentration of corner gas, improve the intelligence level of corner gas prevention and control, and promote the development of corner gas prevention and control in comprehensive mining working faces from "few people" to "unmanned", thereby reducing the labor intensity of workers and maximizing the coal mining efficiency of mines, thereby providing technical guarantee for the safe and efficient production of coal mining enterprises.

[0048] In some embodiments, the above step S120 can be implemented by following the steps S121 to S124:

[0049] Step S121, taking the coal mining machine operating state, the internal and external spray parameters of the coal mining machine and the working face air volume as influencing factors, and the working face corner gas concentration as the target prediction value, to construct a corner gas concentration prediction training data set.

[0050] Step S122, using a range normalization method to normalize the training data set to obtain a standardized training data set.

[0051] Step S123, dividing the standardized training data set to obtain a training set and a validation set.

[0052] Step S124, training the prediction model of the training set by using a preset algorithm, and comparing the prediction error and fitting accuracy in the validation set to obtain the working face corner gas concentration prediction model.

[0053] In some embodiments, the above step S140 can be implemented by the following steps S141 to S143:

[0054] Step S141, when the prediction result meets the first preset condition, the internal and external spray parameters of the coal mining machine are adjusted.

[0055] Step S142, when the prediction result meets the second preset condition, the internal and external spray parameters of the coal mining machine and the working face air volume are adjusted.

[0056] Step S143, when the prediction result meets the third preset condition, the operating speed of the coal mining machine in the operating state, the internal and external spray parameters of the coal mining machine and the working face air volume are adjusted.

[0057] In some embodiments, the specific working conditions of each adjustment method are determined according to the "Coal Mine Safety Regulations", industry standards, regulations of coal mine enterprises at all levels, and actual experience in the production process. In this application, the first preset condition refers to when the corner gas concentration is greater than 0.2% after 30 minutes, the adjustment is made through the internal and external spray parameters of the coal mining machine; the second preset condition refers to when the corner gas concentration is between 0.2% and 0.5% after 30 minutes, the adjustment is made through the internal and external spray parameters of the coal mining machine and the working face air volume; the third preset condition refers to when the corner gas concentration is greater than 0.5% after 30 minutes, the adjustment is made through the internal and external spray parameters of the coal mining machine, the working face air volume and the coal mining machine running speed.

[0058] In some embodiments, the working face corner gas prevention and control method is applied to a corner gas prevention and control system, the system comprising at least a corner rapid plugging airbag;

[0059] The corner quick-sealing airbag is arranged at the corner of the working surface; the corner quick-sealing airbag comprises an airbag body, an inflation pipe, a connecting pipe, a pressure gauge, a safety valve and a pressure relief valve;

[0060] The airbag body is provided with a telescopic skeleton so that the two opposite surfaces of the airbag body can adapt to the corner section. The airbag body comprises an inner liner, an outer liner and a sponge filling body filled between the inner liner and the outer liner; the outer liner and the inner liner are made of telescopic double-anti-static coated cloth; the outer liner is provided with a reinforcing layer made of antistatic and flame-retardant soft PVC material;

[0061] The inflation tube passes through the outer liner and is connected to the inner liner, and the safety valve, the pressure relief valve and the pressure gauge are arranged on the inflation tube. The connecting tube is connected to the inflation tube to fill the internal space of the airbag body so that it adapts to the corner section to form an air wall seal.

[0062] In some embodiments, the system further comprises: a corner gas concentration monitoring component, and the corner gas concentration detection component is arranged at the corner of the working surface;

[0063] The corner gas concentration monitoring component includes a gas concentration sensor, an underground substation, and a ground monitoring platform;

[0064] The gas concentration sensor collects the gas concentration data of the working face corners and generates a gas concentration signal; the gas concentration signal is transmitted to the underground substation; after the underground substation processes the gas data of the working face corners and predicts the trend of the gas concentration change in the corners, it adjusts the operating status of the coal mining machine, the internal and external spray parameters of the coal mining machine, and the working face air volume to obtain adjusted real-time data; the adjusted real-time data is transmitted to the ground monitoring platform; the ground monitoring platform is used to display the real-time gas concentration data of the corners, the trend of the gas concentration change in the corners and the prediction results, the operating status of the coal mining machine, and the internal and external spray parameters of the coal mining machine.

[0065] In some embodiments, the system further comprises: a coal mining machine assembly;

[0066] The shearer assembly includes a shearer drum and a shearer internal and external spray;

[0067] The corner gas concentration monitoring component receives the data fed back by the gas concentration sensor; predicts the trend of the corner gas concentration change, and outputs a command signal to the coal mining machine control unit;

[0068] The coal mining machine control unit receives the command signal and optimizes and adjusts the coal mining machine operating state and the internal and external spray parameters of the coal mining machine to ensure that the corner gas concentration is not exceeded and maximize the production efficiency of the working face.

[0069] The following describes an exemplary application of an embodiment of the present invention in a practical application scenario.

[0070] The present embodiment provides another method for preventing and controlling gas in corners under high-intensity mining conditions, including corner rapid sealing airbags, corner gas concentration monitoring and data feedback processing components, coal mining machine components (coal mining machine operating status, coal mining machine internal and external spray parameters), working face air volume adjustment components and other components. The corner rapid sealing airbags are arranged at the corners of the working face; the corner gas concentration monitoring components are arranged at the corners of the working face; the coal mining machine is arranged on the working face; the working face air volume is adjusted by the mine ventilator.

[0071] The corner quick-sealing airbag includes an airbag body, an inflation tube, a connecting tube, a pressure gauge, a safety valve and a pressure relief valve; a telescopic skeleton is arranged in the airbag body so that the two opposite surfaces of the airbag body can adapt to the corner section, and the airbag body includes an inner liner and an outer liner and a sponge filling body filled between the inner liner and the outer liner; the outer liner and the inner liner are made of retractable double-anti-coated cloth; a reinforcement layer made of anti-static and flame-retardant soft PVC material is arranged on the outer liner; the inflation tube passes through the outer liner and is connected to the inner liner, and an inflation valve, a pressure relief valve and a pressure gauge are arranged on the inflation tube, and the connecting tube is connected to the inflation tube to fill the internal space of the airbag body so that it can adapt to the corner section to form an air wall to seal.

[0072] The corner gas concentration monitoring and data feedback processing component mainly includes a gas concentration sensor, an underground substation, and a ground monitoring platform. The gas concentration sensor collects the gas concentration data of the working face corners and generates a gas concentration signal, and then transmits the data to the underground substation through optical fiber. After the underground substation processes the working face corner gas data, it predicts the trend of changes in the corner gas concentration, and then adjusts the coal mining machine operating status, coal mining machine internal and external spray parameters, and working face air volume, and transmits real-time data to the ground monitoring platform. The ground monitoring platform is used to display real-time corner gas concentration data, corner gas concentration change trends and prediction results, coal mining machine operating status, coal mining machine internal and external spray corresponding parameters and other data.

[0073] The underground substation performs feedback processing on the gas concentration in the corners of the working face, and predicts the gas concentration in the corners of the working face based on the gas concentration prediction model of the working face, and adjusts the operating status of the coal mining machine, the spray parameters inside and outside the coal mining machine, and the air volume of the working face according to the prediction results and the gas concentration safety threshold (this threshold is set according to the "Coal Mine Safety Regulations", relevant industry standards and requirements, and the previous production experience and actual conditions of the mine). The specific adjustment method should be made on the premise of ensuring that the gas concentration in the corners does not exceed the limit and the coal mining efficiency is maximized, combined with the actual situation of the mine. In accordance with actual production conditions and relevant regulations and requirements (air volume adjustment needs to consider factors such as working face wind speed, working face gas outburst volume, working face oxygen concentration, etc., and excessive or insufficient air volume will affect normal coal mining work), first adjust the internal and external spray parameters of the coal mining machine, then adjust the ventilation volume of the working face (i.e., adjustment of internal and external spray parameters of the coal mining machine + adjustment of working face air volume), and finally adjust the operating speed of the coal mining machine (i.e., adjustment of internal and external spray parameters of the coal mining machine + adjustment of working face air volume + adjustment of coal mining machine operating speed). The three work together to prevent and control corner gas concentration.

[0074] The working face corner gas concentration prediction model is as follows: the real-time data of normal mining of the underground working face is collected at a certain sampling interval, the operating status of the coal mining machine, the spray parameters inside and outside the coal mining machine, and the ventilation volume of the working face are used as influencing factors, and the corner gas concentration is used as the target prediction value to construct a corner gas concentration prediction training data set. The above data are divided and preprocessed, and the "min-max" method is used to standardize the data to eliminate the influence of different data dimensions. The data set is divided into a training set and a validation set at a ratio of 70%-30%. The prediction model is trained on the data in the above training set through an algorithm, and the prediction error and fitting accuracy in the validation set are compared to verify the accuracy of the model, and further obtain the working face corner gas concentration prediction model.

[0075] The shearer assembly mainly includes a shearer drum and internal and external sprays. During the production process, the working corner gas concentration monitoring assembly receives and processes the feedback data from the gas concentration sensor and predicts the trend of the gas concentration change in the working face corner, and then outputs a command signal to the shearer control unit. The shearer control unit receives the command signal to optimize and adjust the shearer drum operating state and internal and external spray parameters. Under the condition of ensuring that the gas concentration in the upper corner does not exceed the limit, the production efficiency of the working face is maximized.

[0076] The working face air volume is adjusted through the mine ventilator, which is similar to the above-mentioned coal mining machine component parameter optimization. The working face air volume is adjusted through the prediction results of the working face corner gas concentration prediction model to maximize the production efficiency of the working face while ensuring that the upper corner gas concentration does not exceed the limit.

[0077] The present invention also provides a method for controlling gas in the corner of a fully mechanized mining face under high-intensity mining conditions. Figure 3 As shown, the following steps are included:

[0078] Step 1: Arrange the corner quick-sealing airbag assembly at the corner of the mine working surface, and install and inflate it;

[0079] Step 2: Prepare the gas inhibitor solution and connect it to the spray pipes inside and outside the coal mining machine;

[0080] Step 3: When the working face is mined, the corner gas concentration information is monitored according to the working face corner gas monitoring component, and the corner gas concentration prediction model is used to adjust the coal mining machine operation status, internal and external spray parameters, working face air volume and other parameters in real time;

[0081] Step 4: As the mining work is completed, remove the corner airbag and move it to the next corner;

[0082] Step 5: Repeat steps 1 to 4 accordingly.

[0083] Figure 4 It is a structural schematic diagram of the working face corner gas linkage control system provided by an embodiment of the present invention, wherein the numbers are 1-ground monitoring platform; 2-underground substation; 3-mine intrinsically safe base station I; 4-gas concentration sensor I; 5-mine intrinsically safe base station II.

[0084] Figure 5 : is a schematic diagram of the composition structure of a gas prevention and control device for a working face corner under high-intensity mining conditions provided by an embodiment of the present invention, such as Figure 5 As shown, the working face corner gas control device 500 under high-intensity mining conditions includes: an acquisition module 501, which is used to obtain the working face corner gas concentration data, the coal mining machine operating status, the coal mining machine internal and external spray parameters, and the working face air volume; a construction module 502, which is used to construct a working face corner gas concentration prediction model based on the working face corner gas concentration data, the coal mining machine operating status, the coal mining machine internal and external spray parameters, and the working face air volume; a prediction module 503, which is used to process the working face corner gas concentration data, and based on the working face corner gas concentration prediction model, predict the corner gas concentration change trend to obtain a prediction result; an adjustment module 504, which is used to adjust the coal mining machine operating status, the coal mining machine internal and external spray parameters and the working face air volume accordingly based on the prediction result to obtain a corner gas control result.

[0085] In some embodiments, the construction module 502 is also used to take the operating status of the coal mining machine, the internal and external spray parameters of the coal mining machine and the working face air volume as influencing factors, and the working face corner gas concentration as the target prediction value, to construct a corner gas concentration prediction training data set; use the range normalization method to standardize the training data set to obtain a standardized training data set; divide the standardized training data set to obtain a training set and a verification set; train the prediction model of the training set through a preset algorithm, and compare the prediction error and fitting accuracy in the verification set to obtain the working face corner gas concentration prediction model.

[0086] In some embodiments, the adjustment module 504 is also used to adjust the internal and external spray parameters of the coal mining machine when the prediction result meets the first preset condition; to adjust the internal and external spray parameters of the coal mining machine and the working face air volume when the prediction result meets the second preset condition; and to adjust the operating speed of the coal mining machine in the operating state, the internal and external spray parameters of the coal mining machine and the working face air volume when the prediction result meets the third preset condition.

[0087] In some embodiments, the working surface corner gas prevention and control method is applied to a corner gas prevention and control system, the system at least includes a corner rapid blocking airbag; the corner rapid blocking airbag is arranged at the working surface corner; the corner rapid blocking airbag includes an airbag body, an inflation tube, a connecting tube, a pressure gauge, a safety valve and a pressure relief valve; a telescopic skeleton is provided in the airbag body so that the two relative surfaces of the airbag body can adapt to the corner section, the airbag body includes an inner liner, an outer liner and a sponge filling body filled between the inner liner and the outer liner; the outer liner and the inner liner are made of retractable double-anti-coated cloth; a reinforcement layer made of anti-static and flame-retardant soft PVC material is provided on the outer liner; the inflation tube passes through the outer liner and is connected to the inner liner, and the safety valve, the pressure relief valve and the pressure gauge are provided on the inflation tube, the connecting tube is connected to the inflation tube, and fills the internal space of the airbag body so that it adapts to the corner section to form an air wall seal.

[0088] In some embodiments, the system also includes: a corner gas concentration monitoring component, and the corner gas concentration detection component is arranged at the corner of the working face; the corner gas concentration monitoring component includes a gas concentration sensor, an underground substation, and a ground monitoring platform; the gas concentration sensor collects the gas concentration data of the working face corner and generates a gas concentration signal; the gas concentration signal is transmitted to the underground substation; after the underground substation processes the gas data of the working face corner and predicts the trend of the change of the corner gas concentration, it adjusts the operating status of the coal mining machine, the internal and external spray parameters of the coal mining machine, and the working face air volume to obtain adjusted real-time data; the adjusted real-time data is transmitted to the ground monitoring platform; the ground monitoring platform is used to display the real-time corner gas concentration data, the trend and prediction results of the corner gas concentration change, the operating status of the coal mining machine, and the internal and external spray parameters of the coal mining machine.

[0089] In some embodiments, the system also includes: a coal mining machine component; the coal mining machine component includes a coal mining machine drum and internal and external spray of the coal mining machine; the data feedback from the gas concentration sensor is received through the corner gas concentration monitoring component; and the trend of changes in the corner gas concentration is predicted, and a command signal is output to the coal mining machine control unit; the coal mining machine control unit receives the command signal, and optimizes and adjusts the operating status of the coal mining machine and the internal and external spray parameters of the coal mining machine to ensure that the corner gas concentration is not exceeded and maximizes the production efficiency of the working face.

[0090] It should be noted that the description of the device of the embodiment of the present invention is similar to the description of the above method embodiment, and has similar beneficial effects as the same method embodiment, so it will not be repeated. For technical details not disclosed in the embodiment of the device, please refer to the description of the method embodiment of the present invention for understanding.

[0091] It should be noted that, in the embodiment of the present invention, if the above-mentioned method for preventing and controlling gas in the corner of the working face under high-intensity mining conditions is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions for enabling a terminal to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiment of the present invention is not limited to any specific combination of hardware and software.

[0092] Correspondingly, an embodiment of the present invention provides a gas prevention and control device for corners of a working face under high-intensity mining conditions. Figure 6 Schematic diagram of the composition structure of the working face corner gas prevention and control equipment under high-intensity mining conditions provided by an embodiment of the present invention, such as Figure 6 As shown, the working face corner gas prevention and control device 600 under high-intensity mining conditions at least includes: a processor 601 and a computer-readable storage medium 602 configured to store executable instructions, wherein the processor 601 generally controls the overall operation of the working face corner gas prevention and control device 600 under high-intensity mining conditions. The computer-readable storage medium 602 is configured to store instructions and applications executable by the processor 601, and can also cache data to be processed or processed by each module in the processor 601 and the working face corner gas prevention and control device 600 under high-intensity mining conditions, which can be implemented through flash memory (FLASH) or random access memory (RAM, Random Access Memory).

[0093] An embodiment of the present invention provides a storage medium storing executable instructions, wherein the executable instructions are stored. When the executable instructions are executed by a processor, the processor will be caused to execute the method provided by the embodiment of the present invention, for example, Figure 1 The method shown.

[0094] In some embodiments, the storage medium can be a computer-readable storage medium, for example, a ferroelectric random access memory (FRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a magnetic surface memory, an optical disk, or a compact disk read-only memory (CD-ROM), etc.; it can also be various devices including one or any combination of the above memories.

[0095] In some embodiments, executable instructions may be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine or other unit suitable for use in a computing environment.

[0096] As an example, executable instructions may, but need not necessarily, correspond to a file in a file system, may be stored as part of a file storing other programs or data, for example, in one or more scripts in a Hyper Text Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions). As an example, executable instructions may be deployed to be executed on one electronic device, or on multiple electronic devices located at one location, or on multiple electronic devices distributed at multiple locations and interconnected by a communication network.

[0097] The above description is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement and improvement made within the spirit and scope of the present invention are included in the protection scope of the present invention.

[0098] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present invention, the size of the serial number 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 embodiment of the present invention. The serial numbers of the above-mentioned embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0099] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of further restrictions, an element defined by the statement "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely 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 can be integrated into another system, or some features can be ignored, or not executed.

[0100] 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 gas in corners of a working face under high-intensity mining conditions, characterized in that: The method comprises: Obtain the working face corner gas concentration data, coal mining machine operation status, coal mining machine internal and external spray parameters, and working face air volume; Based on the working face corner gas concentration data, the coal mining machine operating status, the coal mining machine internal and external spray parameters, and the working face air volume, a working face corner gas concentration prediction model is constructed; Processing the gas concentration data of the working face corners, and predicting the changing trend of the gas concentration in the corners based on the working face corner gas concentration prediction model to obtain a prediction result; Based on the prediction results, the operating state of the coal mining machine, the internal and external spray parameters of the coal mining machine and the working face air volume are adjusted accordingly to obtain corner gas prevention and control results.

2. The method according to claim 1, characterized in that The method of constructing a working face corner gas concentration prediction model based on the working face corner gas concentration data, the coal mining machine operation status, the coal mining machine internal and external spray parameters, and the working face air volume includes: Taking the coal mining machine operation state, the internal and external spray parameters of the coal mining machine and the working face air volume as influencing factors, and the working face corner gas concentration as the target prediction value, a corner gas concentration prediction training data set is constructed; The training data set is standardized by using a range standardization method to obtain a standardized training data set; Dividing the standardized training data set to obtain a training set and a validation set; The prediction model of the training set is trained by a preset algorithm, and the prediction error and fitting accuracy in the verification set are compared to obtain the working face corner gas concentration prediction model.

3. The method according to claim 1, characterized in that Based on the prediction result, the operation state of the coal mining machine, the internal and external spray parameters of the coal mining machine and the air volume of the working face are adjusted accordingly to obtain the corner gas prevention and control results, including: When the prediction result meets the first preset condition, adjusting the internal and external spray parameters of the coal mining machine; When the prediction result meets the second preset condition, the internal and external spray parameters of the coal mining machine and the air volume of the working face are adjusted; When the prediction result meets the third preset condition, the operating speed of the coal mining machine in the operating state, the internal and external spray parameters of the coal mining machine and the working face air volume are adjusted.

4. The method according to claim 1, characterized in that: The working face corner gas prevention and control method is applied to a corner gas prevention and control system, and the system at least includes a corner rapid blocking airbag; The corner quick-sealing airbag is arranged at the corner of the working surface; the corner quick-sealing airbag comprises an airbag body, an inflation pipe, a connecting pipe, a pressure gauge, a safety valve and a pressure relief valve; The airbag body is provided with a telescopic skeleton so that the two opposite surfaces of the airbag body can adapt to the corner section. The airbag body comprises an inner liner, an outer liner and a sponge filling body filled between the inner liner and the outer liner; the outer liner and the inner liner are made of telescopic double-anti-static coated cloth; the outer liner is provided with a reinforcing layer made of antistatic and flame-retardant soft PVC material; The inflation tube passes through the outer liner and is connected to the inner liner, and the safety valve, the pressure relief valve and the pressure gauge are arranged on the inflation tube. The connecting tube is connected to the inflation tube to fill the internal space of the airbag body so that it adapts to the corner section to form an air wall seal.

5. The method according to claim 4, characterized in that The system further comprises: a corner gas concentration monitoring component, and the corner gas concentration detection component is arranged at the corner of the working surface; The corner gas concentration monitoring component includes a gas concentration sensor, an underground substation, and a ground monitoring platform; The gas concentration sensor collects the gas concentration data of the working surface corners and generates a gas concentration signal; Transmitting the gas concentration signal to the underground substation; After the underground substation processes the gas data of the corner of the working face and predicts the trend of the change of the gas concentration in the corner, it adjusts the operation state of the coal mining machine, the spray parameters inside and outside the coal mining machine, and the air volume of the working face to obtain the adjusted real-time data; The adjusted real-time data is transmitted to the ground monitoring platform; the ground monitoring platform is used to display the real-time corner gas concentration data, the corner gas concentration change trend and prediction results, the coal mining machine operating status, and the internal and external spray parameters of the coal mining machine.

6. The method according to claim 5, characterized in that The system also includes: a coal mining machine assembly; The shearer assembly includes a shearer drum and a shearer internal and external spray; The corner gas concentration monitoring component receives the data fed back by the gas concentration sensor; predicts the trend of the corner gas concentration change, and outputs a command signal to the coal mining machine control unit; The coal mining machine control unit receives the command signal and optimizes and adjusts the coal mining machine operating state and the internal and external spray parameters of the coal mining machine to ensure that the corner gas concentration is not exceeded and maximize the production efficiency of the working face.

7. A gas prevention and control device for working face corners under high-intensity mining conditions, characterized in that: The device comprises: An acquisition module is used to obtain the gas concentration data of the working face corners, the operating status of the coal mining machine, the internal and external spray parameters of the coal mining machine, and the air volume of the working face; A construction module is used to construct a working face corner gas concentration prediction model based on the working face corner gas concentration data, the coal mining machine operation status, the coal mining machine internal and external spray parameters, and the working face air volume; A prediction module, used to process the gas concentration data of the working surface corners, and predict the changing trend of the gas concentration of the corners based on the working surface corner gas concentration prediction model to obtain a prediction result; An adjustment module is used to make corresponding adjustments to the operating state of the coal mining machine, the internal and external spray parameters of the coal mining machine, and the working face air volume based on the prediction results to obtain corner gas prevention and control results.

8. An electronic device, characterized in that: include: A memory for storing executable instructions; The processor is used to implement the method for preventing and controlling gas in corners of a working face under high-intensity mining conditions as described in any one of claims 1 to 6 when executing the executable instructions stored in the memory.

9. A computer-readable storage medium storing executable instructions for causing a processor to execute the executable instructions to implement the method for preventing and controlling gas in corners of a working face under high-intensity mining conditions as described in any one of claims 1 to 6.

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