Monitoring system and method for coal mining paste filling material conveying

Abstract

The invention discloses a monitoring system and method for coal mining paste filling material conveying, and relates to the technical field of coal mining. Comprising a data calling module, a preliminary analysis module, a conveying prediction module, a comprehensive regulation and control module and a safety monitoring module. The data calling module is used for obtaining historical monitoring data of paste filling material conveying and data of paste filling materials needing to be conveyed in the future. According to the technical key points, historical monitoring data of the coal mining paste filling materials are obtained, the historical monitoring data are analyzed, pressure needed for conveying the paste filling materials in the future is predicted in combination with data of the paste filling materials needing to be conveyed in the future, a conveying scheme can be reasonably formulated, and the paste filling material conveying cost is reduced; meanwhile, the situation that the paste filling material blocks the pipeline is effectively reduced, the using effect is good, and the good using prospect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining, in particular to a monitoring system and method for conveying paste filling materials in coal mining. Background Art

[0002] Backfill mining refers to a mining method that uses backfill materials to fill the goaf during ore dropping, transportation and other operations. The purpose of backfilling is to support the rocks on both sides of the goaf and to form a base for continued stratified mining above.

[0003] Paste filling technology creatively reuses solid waste such as tailings and waste rock into paste to fill the goaf, eliminating the tailings pond and managing the goaf at the same time, which can better solve the serious geological disaster risks brought by the tailings pond and the goaf.

[0004] Paste filling improves the local and regional stability of the ore body, and disposes of related waste slag appropriately and economically, reducing pollution and negative impacts on the surrounding environment; the filling body can be used as a secondary ground support column to improve the stability of mine mining, help prevent roof collapse, and increase the recovery rate and productivity of the ore pillars; the paste filling body has little free water, which avoids the need for drainage during maintenance and shortens the mining cycle time.

[0005] The existing application publication number is CN114544071A, and the invention patent named "An online monitoring system for the conveying status of paste filling materials" records that it includes a batching bin, a main conveying pipeline and an online monitoring device. The batching bin stores the paste filling material that has been stirred evenly, and the online monitoring device is bypassed and arranged on the main conveying pipeline. The main conveying pipeline and the online monitoring device respectively import the paste filling material from the batching bin, and the online monitoring device collects the conveying parameters of the imported paste filling material and then guides the paste filling material to the main conveying pipeline. The present invention can realize online monitoring of the conveying resistance loss, viscosity and flow state of the paste filling material, and is connected in parallel with the main conveying pipeline, which does not affect the operation of the main conveying system, can prevent pipe blockage accidents, and is easy to debug and maintain, which is of great value in underground coal filling and mining operations.

[0006] However, according to the above contents and in combination with the prior art, the core solution of the solution described in the above patent is mainly to detect the parameters of the paste filling material when the paste filling material is configured and transported to the designated location.

[0007] However, the above scheme has great defects when used. In actual use, the technology in this area is relatively mature, and there are many technologies for detecting this. The difficulty in the process of conveying paste filling materials lies in how to set it up so that the paste filling materials can be delivered to the place at low cost, how to find the blockage position in time and deal with it in time to avoid the situation where the pipeline ruptures and the paste filling materials flow everywhere, and the pipeline is blocked and the pipeline pressure is too high, causing damage to the pumping equipment. The above scheme is not comprehensive enough for the detection of paste filling materials in the process of conveying, there are certain risks, and it does not meet people's use requirements. For this reason, we have developed a monitoring system and method for conveying paste filling materials in coal mining. Summary of the invention

[0008] 1. Technical issues to be solved

[0009] In view of the shortcomings of the prior art, the present invention provides a monitoring system and method for conveying paste filling materials in coal mining, which obtains historical monitoring data of paste filling materials in coal mining, analyzes the historical monitoring data, and predicts the pressure required for conveying paste filling materials in the future in combination with the data of paste filling materials that need to be conveyed in the future. The system and method can reasonably formulate a conveying plan and reduce the cost of conveying paste filling materials. At the same time, it can effectively reduce the situation of paste filling materials clogging pipelines. The system and method have good use effect and good use prospects.

[0010] (II) Technical solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0012] A monitoring system for conveying paste filling materials in coal mining, including a data retrieval module, a preliminary analysis module, a conveying prediction module, a comprehensive control module and a safety monitoring module:

[0013] Data retrieval module: obtains historical monitoring data of paste filling material delivery and data of paste filling materials that need to be delivered in the future;

[0014] Preliminary analysis module: Based on the historical monitoring data of the paste filling material transportation, calculate the resistance of the pipeline to the flow of the paste filling material and the change rate of the pipeline resistance to the flow of the paste filling material over time during the transportation process;

[0015] Transportation prediction module: obtain the resistance of the pipeline to the flow of paste filling materials and the rate of change of the resistance of the pipeline to the flow of paste filling materials over time during transportation, formulate a transportation plan, and implement it according to the transportation plan;

[0016] Comprehensive control module: including data acquisition unit, monitoring and analysis unit and real-time adjustment unit;

[0017] The data acquisition unit obtains the monitoring data generated during the implementation of the transportation plan, and transmits the monitoring data to the monitoring and analysis unit for analysis and processing, determines the pipeline transportation state value, and compares the transportation state value with the set blockage interval to determine the pipeline blockage degree. The real-time adjustment unit executes the corresponding adjustment strategy according to the pipeline blockage degree;

[0018] Safety monitoring module: used to obtain pipeline data after the paste filling material is transported, calculate the pipeline risk factor Glfx based on the pipeline data, and determine whether the pipeline needs to be replaced based on the pipeline risk factor.

[0019] Preferably, the types of data monitored during the transportation of paste filling materials include pipeline transportation flow, pressure data at different positions of the pipeline, resistivity of paste filling materials at different positions and vibration data of the pipeline. The data of paste filling materials include average aggregate particle size, slurry density and particle density. The pipeline data include ultrasonic flaw detection data at the stress position of the pipeline elbow and the friction coefficient of the pipeline.

[0020] Preferably, the calculation formula of the resistance of the pipeline to the flow of the paste filling material is as follows:

[0021]

[0022] In the formula, ZL 管道 is the resistance of the pipeline to the flow of paste filling materials, n is the number of selected historical monitoring data, β is the impact data of the characteristics of the paste filling materials to be transported in the future on the resistance, is the total resistance of all horizontal pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all downward sloping pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all vertical pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all elbows in the i-th group of data to the flow of paste filling materials, α i is the influence data of the properties of the paste filling material transported on the resistance in the i-th group of data, K is the error ratio caused by pipeline loss, 0≤K≤8%;

[0023] Among them, the calculation formula for the total flow resistance of all horizontal pipes to the paste filling material is as follows:

[0024]

[0025] In the formula, ZL 水平 is the total resistance of the horizontal pipeline to the flow of paste filling materials, a is the number of horizontal pipelines in the paste filling material delivery pipeline, △P i水平 is the pressure difference between the two ends of the i-th horizontal pipe, ρ is the density of the paste filling material, and g is the gravitational acceleration;

[0026] The calculation formula for the total flow resistance of all downward inclined pipes to paste filling materials is as follows:

[0027]

[0028] In the formula, ZL 斜下 is the total resistance of the downward inclined pipeline to the flow of the paste filling material, b is the number of downward inclined pipelines in the paste filling material delivery pipeline, L i斜下 is the length of the i-th group of downward inclined pipes, θ i is the slope of the i-th group of downward sloping pipes, △P i斜下 is the pressure difference between the two ends of the i-th downward sloping pipe;

[0029] The calculation formula of the total resistance of all vertical pipes to the flow of paste filling materials is as follows:

[0030]

[0031] In the formula, ZL 竖直 is the total resistance of the vertical pipeline to the flow of the paste filling material, c is the number of vertical pipelines in the paste filling material delivery pipeline, L i竖直 is the length of the i-th group of vertical pipes, △P i竖直 is the pressure difference between the two ends of the i-th vertical pipe;

[0032] The calculation formula of the total resistance of all elbows to the flow of paste filling materials is as follows:

[0033]

[0034] In the formula, ZL 弯管 is the total resistance of all elbows to the flow of paste filling materials, d is the number of elbows in the paste filling material delivery pipeline, △P i弯管 is the pressure difference at both ends of the ith elbow, and △H is the height difference between the center points at both ends of the ith elbow.

[0035] Preferably, the calculation formula for the influence of the properties of the paste filling material to be transported in the future on the resistance is as follows:

[0036]

[0037] Where r is the average particle size of aggregate in the paste filling material, v is the movement speed of the paste filling material, and D is the diameter of the pipe.

[0038] Preferably, the formula for calculating the rate of change of the resistance of the pipeline to the flow of the paste filling material at the kth time point during the transportation process is as follows:

[0039]

[0040] In the formula, BHL i is the change rate of the resistance of the pipeline to the flow of the paste filling material at the i-th time point during the transportation process, ZL k管道 is the resistance of the pipeline to the flow of paste filling material at the kth time point.

[0041] Preferably, formulating a delivery plan includes formulating a pump pressure and a pump speed of a pumping device, wherein the pump speed of the pumping device is set according to the speed v of the paste filling material movement, and the pressure YL required for the paste filling material to flow at different time points is calculated according to the resistance of the pipeline to the flow of the paste filling material and the rate of change of the resistance of the pipeline to the flow of the paste filling material over time during transportation. i , the specific calculation formula is as follows;

[0042] YL i =ZL 管道 ×BHL i +AY

[0043] Where AY is the error pressure data.

[0044] Preferably, the pipeline transportation state value includes a bend pipe transportation state value and other pipeline transportation state values;

[0045] The calculation formulas for other pipeline transport status values ​​are as follows:

[0046]

[0047] In the formula, To monitor the average pressure data of the pipeline, is the predicted average pipeline pressure data;

[0048] The calculation formula of the elbow conveying state value is as follows:

[0049]

[0050] In the formula, Zd JC is the monitored pipeline vibration data, Zd bz To set the standard vibration data of the pipeline when conveying paste filling materials.

[0051] Preferably, the congestion interval includes a normal transport interval (0, m], a suspected congestion interval (m, 2m], and a serious congestion interval (2m, +∞);

[0052] When judging the degree of pipeline blockage, the calculated pipeline transportation state value is compared with the blockage interval, and the pipeline blockage is judged according to the corresponding interval of the pipeline transportation state value;

[0053] When all pipeline transport status values ​​are within the normal transport interval (0, m], no adjustment is made;

[0054] When some pipeline transport status values ​​are in the suspected blockage interval and other pipeline transport status values ​​are in the normal transport interval, increase the pump pressure. The adjusted pump pressure is pressure YL i 1-1.2 times;

[0055] When the transport status values ​​of some pipelines are in the blocked interval, an alarm is issued and the pipelines whose transport status values ​​are in the blocked interval are marked;

[0056] The data acquisition unit also collects the resistivity of the paste filling material at the beginning and the end of the delivery pipeline, and calculates the resistivity change rate, which is resistivity change rate = (resistivity of the paste filling material at the beginning of the delivery pipeline - resistance of the paste filling material at the end of the delivery pipeline) / resistivity of the paste filling material at the beginning of the delivery pipeline × 100%. When the resistivity change rate exceeds 10%, the pump speed is adjusted. After adjustment, the pump speed = pump speed × (1 + resistivity change rate).

[0057] Preferably, the calculation formula of the pipeline risk factor Glfx is as follows:

[0058]

[0059] Where h is the number of pipe wear areas, ms i is the defect signal value monitored in the i-th wear area, mj i is the area of ​​the i-th wear region. When the pipeline risk factor Glfx reaches the set replacement value, all pipelines are replaced.

[0060] Preferably, a monitoring method for conveying coal mining paste filling materials comprises the following steps:

[0061] Obtain historical monitoring data of paste filling material delivery and data of paste filling materials that need to be delivered in the future;

[0062] Based on the historical monitoring data of the transportation of the paste filling material, the resistance of the pipeline to the flow of the paste filling material and the rate of change of the resistance of the pipeline to the flow of the paste filling material over time during the transportation process are calculated;

[0063] Obtain the resistance of the pipeline to the flow of the paste filling material and the rate of change of the resistance of the pipeline to the flow of the paste filling material over time during transportation, and formulate a transportation plan;

[0064] Convey the paste filling material according to the conveying plan, collect the monitoring data generated during the conveying process, analyze and process the monitoring data, determine the pipeline conveying state value, and compare the conveying state value with the set blockage interval to determine the pipeline blockage degree. The real-time adjustment unit executes the corresponding adjustment strategy according to the pipeline blockage degree;

[0065] The pipeline data after the paste filling material is transported is obtained, and the pipeline risk factor Glfx is calculated according to the pipeline data, and it is determined whether the pipeline risk factor Glfx reaches the preset safety value. When the set replacement value is reached, all the conveying pipelines are replaced.

[0066] (III) Beneficial effects

[0067] The present invention provides a monitoring system and method for conveying paste filling materials in coal mining, which has the following beneficial effects:

[0068] 1. The present invention records a monitoring system for conveying paste filling materials in coal mining, which obtains historical monitoring data of paste filling materials in coal mining, analyzes the historical monitoring data, and predicts the pressure required for conveying paste filling materials in the future in combination with the data of paste filling materials that need to be conveyed in the future. It can reasonably formulate a conveying plan, reduce the cost of conveying paste filling materials, and effectively reduce the situation of paste filling materials clogging pipelines. It has good use effect and good use prospects.

[0069] 2. The present invention records a monitoring system for conveying paste filling materials in coal mining, which monitors the paste filling material conveying pipeline, can help relevant technical personnel quickly and clearly understand the transportation status of the paste filling materials, and automatically execute corresponding adjustment strategies in the early stage of blockage, can eliminate most of the blockages, and stop running when serious blockage occurs, effectively reducing risks. At the same time, it can help relevant technical personnel understand the location of the blockage, can help relevant technical personnel to deal with it in time, and can automatically adjust the speed for paste filling materials that are easy to settle, reduce the impact of sedimentation on the conveying of paste filling materials, so that the entire coal mining paste filling material conveying efficiency is higher, the use effect is good, and it has a good prospect of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a flow chart of a monitoring system for conveying paste filling materials in coal mining according to the present invention;

[0071] Figure 2 This is a usage status diagram of a monitoring system for conveying paste filling materials in coal mining according to the present invention;

[0072] Figure 3 The present invention is a flow chart of a monitoring system for conveying paste filling materials in coal mining. DETAILED DESCRIPTION

[0073] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0074] Research reasons

[0075] The existing monitoring system for conveying paste filling materials in coal mining detects the parameters of the paste filling materials when the paste filling materials are configured and conveyed to a designated location.

[0076] However, in actual use, the configuration technology of pastes is relatively mature, and there are many technologies for detecting this point, so there is no need for further improvement in this aspect. The difficulty in the transportation process of paste filling materials lies in how to set it up so that the paste filling materials can be delivered to the place at low cost, how to find the blockage position in time and deal with it in time to avoid the blockage of materials in the pipeline causing pipeline rupture, paste filling materials flowing everywhere, and pipeline blockage causing excessive pipeline pressure and causing damage to pumping equipment. Therefore, the above scheme is not comprehensive enough for the detection of paste filling materials during transportation, and there are certain risks.

[0077] Design ideas

[0078] Most of the existing systems collect paste filling materials at the distribution points and the final location. During transportation, in order to avoid paste clogging, the pumping equipment is usually operated at high power to ensure the conveying pressure and conveying speed of the paste filling materials. However, when using this method, the pumping equipment runs at high power, which requires a relatively high cost. In addition, due to the high pump pressure and fast pump speed provided by the pumping equipment, the impact force generated during the transportation of the paste filling materials will be large, which will cause rapid wear of the pipeline and make the pipeline vibrate greatly during transportation, affecting the connection effect between the pipelines and causing the pipelines to separate easily.

[0079] Therefore, during the research and development process, the initial idea was to find the original data, find the conveying data of paste filling materials with similar particle size and density, and then adaptively fine-tune the conveying data to generate a new paste filling material conveying plan.

[0080] However, in actual use, it was found that this method requires multiple versions to be iterated in the mid-term and cannot be adjusted in place at one time. It takes a relatively long time and is therefore not very applicable. In addition, further research found that the composition of paste filling materials used in different periods is different, and there will still be certain differences in the transportation of previous paste filling material data, which does not meet people's usage requirements.

[0081] Therefore, in the middle of the research and development, we changed our thinking and studied new solutions. After research, we invented a method to calculate the resistance of the pipeline to paste filling materials. This method can directly calculate the change in resistance of paste filling materials during the transportation process, thereby formulating a more stable transportation plan.

[0082] However, in actual use, it was found that using a more stable conveying solution can greatly reduce the number of blockages. However, during use, blockages may still occur due to aggregate sedimentation in the paste filling material and other factors, which can easily lead to safety accidents.

[0083] Therefore, in the later stage of research and development, the previous solutions were fully combined to strictly monitor the transportation of paste filling materials, and implement corresponding strategies when blockage occurs, so as to effectively reduce the risks during the transportation of paste filling materials.

[0084] Study plan

[0085] Example 1

[0086] like Figure 1-2 As shown, a monitoring system for conveying paste filling materials in coal mining is composed of a hardware part and a software part.

[0087] The hardware part mainly consists of monitoring equipment installed on the conveying pipeline, which includes resistivity sensors installed at the head end and near the end of the pipeline. The model of the resistivity sensor is HEST-200, which is used to measure the resistivity and distribution of the paste filling material inside the pipeline; pressure sensors installed at both ends of the straight pipeline constituting the conveying pipeline. The pressure sensor adopts the PT111 series and is used to measure the pressure of the paste filling material inside the pipeline; ultrasonic flaw detection sensors (using metal pipe phased array ultrasonic flaw detection sensor probes) and vibration sensors (using vibration sensors with model RV971A) installed on the stress-bearing surfaces of the straight pipe bends constituting the conveying pipeline are used to monitor the wear of the pipeline and the vibration data of the pipeline during transportation.

[0088] The signals collected and transmitted during use are transmitted to the control device of the original monitoring system, without the need to add a separate control device.

[0089] The software part includes data retrieval module, preliminary analysis module, transportation prediction module, comprehensive control module and safety monitoring module:

[0090] In order for all systems to run accurately when in use, they must have sufficient data as a basis. Therefore, it is necessary to obtain historical monitoring data from the database. The acquisition of historical monitoring data is based on the data retrieval module.

[0091] Data retrieval module: obtains historical monitoring data of paste filling material transportation and data of paste filling materials that need to be transported in the future. The data of paste filling materials that need to be transported in the future can be directly sent to the filling site for acquisition or collected on-site;

[0092] The types of data monitored during the transportation of paste filling materials include pipeline transportation flow, pressure data at different positions of the pipeline, resistivity of paste filling materials at different positions and pipeline vibration data. The data of paste filling materials include average aggregate particle size, slurry density and particle density.

[0093] After obtaining the historical monitoring data, it is necessary to further analyze the historical monitoring data to extract the required data, and this process is based on the preliminary analysis module.

[0094] Preliminary analysis module: Based on the historical monitoring data of the paste filling material transportation, calculate the resistance of the pipeline to the flow of the paste filling material and the change rate of the pipeline resistance to the flow of the paste filling material over time during the transportation process;

[0095] The calculation formula of the pipeline resistance to the flow of paste filling material is as follows:

[0096]

[0097] In the formula, ZL 管道 is the resistance of the pipeline to the flow of paste filling materials, n is the number of selected historical monitoring data, β is the impact data of the characteristics of the paste filling materials to be transported in the future on the resistance, is the total resistance of all horizontal pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all downward sloping pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all vertical pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all elbows in the i-th group of data to the flow of paste filling materials, α i is the influence data of the properties of the paste filling material transported on the resistance in the i-th group of data, K is the error ratio caused by pipeline loss, 0≤K≤8%;

[0098] The calculation result is the total resistance in the i-th group of monitoring data without considering the influence of paste fillings. In order to obtain accurate data, n groups of data (more accurate data after screening) are used. After the data are summarized, since the data used are from the same group of fixed pipelines, they can be directly divided by n to get the average, and then multiplied by β to consider the influence of the paste filling materials that need to be transported in the future on the resistance. Further taking into account the calculation error, the resistance of the pipeline to the flow of paste filling materials can be obtained. When the resistance is obtained, it can help the staff understand the minimum pump pressure required for the transportation of paste filling materials, so that the relevant staff can reasonably formulate corresponding transportation plans.

[0099] This patent is based on the existing reasonably laid out pipeline scenario, so there is no upward pipeline and there is no need to calculate the upward resistance.

[0100] Among them, the calculation formula for the total flow resistance of all horizontal pipes to the paste filling material is as follows:

[0101]

[0102] In the formula, ZL 水平 is the total resistance of the horizontal pipeline to the flow of paste filling materials, a is the number of horizontal pipelines in the paste filling material delivery pipeline, △P i水平 is the pressure difference between the two ends of the i-th horizontal pipe, ρ is the density of the paste filling material, and g is the gravitational acceleration;

[0103] This formula is derived from the Bernoulli equation converted and combined with computer simulation.

[0104] The calculation formula for the total flow resistance of all downward inclined pipes to paste filling materials is as follows:

[0105]

[0106] In the formula, ZL 斜下 is the total resistance of the downward inclined pipeline to the flow of the paste filling material, b is the number of downward inclined pipelines in the paste filling material delivery pipeline, L i斜下 is the length of the i-th group of downward inclined pipes, θ i is the slope of the i-th group of downward sloping pipes, △P i斜下 is the pressure difference between the two ends of the i-th downward sloping pipe;

[0107] This formula is derived from the Bernoulli equation converted and combined with computer simulation.

[0108] The calculation formula of the total resistance of all vertical pipes to the flow of paste filling materials is as follows:

[0109]

[0110] In the formula, ZL 竖直 is the total resistance of the vertical pipeline to the flow of the paste filling material, c is the number of vertical pipelines in the paste filling material delivery pipeline, L i竖直 is the length of the i-th group of vertical pipes, △P i竖直 is the pressure difference between the two ends of the i-th vertical pipe;

[0111] This formula is derived from the Bernoulli equation converted and combined with computer simulation.

[0112] The calculation formula of the total resistance of all elbows to the flow of paste filling materials is as follows:

[0113]

[0114] In the formula, ZL 弯管 is the total resistance of all elbows to the flow of paste filling materials, d is the number of elbows in the paste filling material delivery pipeline, △P i弯管 is the pressure difference at both ends of the ith elbow, and △H is the height difference between the center points at both ends of the ith elbow.

[0115] The elbow is the place that is most prone to clogging and wear. Therefore, when calculating the resistance of this part, it is necessary to combine the wear data of the elbow. The result calculated in this way is more accurate.

[0116] This formula is derived from the Bernoulli equation converted and combined with computer simulation.

[0117] The calculation formula for the influence of the properties of the paste filling material to be transported in the future on the resistance is as follows:

[0118]

[0119] Where r is the average particle size of aggregate in the paste filling material, v is the movement speed of the paste filling material, and D is the diameter of the pipe.

[0120] During transportation, the paste filling material is basically in a state of customization, because if the speed is too fast, the paste filling material will impact the elbow, and if the speed is too slow, the paste filling material will settle. Therefore, the paste filling material is basically in a constant state (the normal conveying aggregate particle size difference is small, so the conveying plan is usually formulated based on the default conveying speed).

[0121] The formula for calculating the rate of change of the pipeline resistance to the flow of paste filling materials at the kth time point during transportation is as follows:

[0122]

[0123] In the formula, BHL iis the change rate of the resistance of the pipeline to the flow of the paste filling material at the i-th time point during the transportation process, ZL k管道 is the resistance of the pipeline to the flow of paste filling material at the kth time point.

[0124] is the rate of change of the resistance of the pipeline to the flow of paste filling material in the i-th group of data.

[0125] During the transportation process, it is inevitable that the paste filling material will adhere to the surface of the pipe. When this happens, it will lead to increased resistance. Therefore, it is necessary to consider the time factor and formulate a more reasonable and scientific plan for good use effect.

[0126] After analyzing the historical monitoring data and extracting the required data, the extracted data needs to be further processed to formulate a scientific transportation plan, and the formulation of the transportation plan is based on the transportation prediction module.

[0127] Transportation prediction module: obtain the resistance of the pipeline to the flow of paste filling materials and the rate of change of the resistance of the pipeline to the flow of paste filling materials over time during transportation, formulate a transportation plan, and implement it according to the transportation plan;

[0128] Formulating a transportation plan includes formulating the pump pressure and pump speed of the pumping equipment. The pump speed of the pumping equipment is set according to the speed v of the paste filling material movement. The pressure YL required for the paste filling material to flow at different time points is calculated based on the pipeline's resistance to the flow of the paste filling material and the rate of change of the pipeline's resistance to the flow of the paste filling material over time during transportation. i , the specific calculation formula is as follows;

[0129] YL i =ZL 管道 ×BHL i +AY

[0130] Where AY is the error pressure data. Generally,

[0131] Transporting according to the above scheme can greatly reduce the possibility of blockage.

[0132] After formulating a scientific transportation plan, it is also necessary to monitor the transportation of paste filling materials to avoid dangerous situations caused by pipeline blockage due to abnormal conditions. The monitoring of the transportation of paste filling materials is based on the comprehensive control module.

[0133] The comprehensive control module includes a data acquisition unit, a monitoring and analysis unit, and a real-time adjustment unit;

[0134] The data acquisition unit obtains the monitoring data generated during the implementation of the transportation plan, and transmits the monitoring data to the monitoring and analysis unit for analysis and processing, determines the pipeline transportation state value, and compares the transportation state value with the set blockage interval to determine the pipeline blockage degree. The real-time adjustment unit executes the corresponding adjustment strategy according to the pipeline blockage degree;

[0135] The pipeline transportation state value includes the elbow transportation state value and other pipeline transportation state values;

[0136] The calculation formulas for other pipeline transport status values ​​are as follows:

[0137]

[0138] In the formula, To monitor the average pressure data of the pipeline, is the predicted average pipeline pressure data;

[0139] The pressure at the beginning and end of the monitored pipeline is different, so the average pressure is used for calculation to calculate the transportation status value of each section of the pipeline separately.

[0140] The preliminary analysis module can predict the pressure of each section of the pipeline during transportation. Combined with the pump pressure, it can directly calculate the pressure at both ends of the pipeline and then calculate

[0141] Other pipes are straight pipes, including horizontal pipes and downward sloping pipes.

[0142] Since the elbow is usually short, the pressure change is not big, but it is impacted, so the vibration data changes obviously. Therefore, the conveying state value of the elbow is analyzed and calculated through the vibration data.

[0143] The calculation formula of the elbow conveying state value is as follows:

[0144]

[0145] In the formula, Zd JC is the monitored pipeline vibration data, Zd bz To set the standard vibration data of the pipeline when conveying paste filling materials.

[0146] For example, in general, the vibration data of elbow pipe is 1-3mm, so Zd bz Take 2mm. If you need to improve the accuracy, you can combine it with pressure. The higher the pressure, the better. bz The larger the value, the lower the pressure. bz The smaller.

[0147] The congestion interval includes the normal transport interval (0, m], the suspected congestion interval (m, 2m], and the serious congestion interval (2m, +∞);

[0148] The suspected blockage interval (m, 2m] is mainly caused by a significant increase in pressure or aggravated vibration due to blockage. Treatment at this time can eliminate the blockage.

[0149] In the severe blockage section (2m, +∞), conventional means of pressurization and acceleration can no longer solve the problem. In order to avoid serious harm caused by blockage, the pump speed equipment needs to be stopped and the blockage location needs to be marked to facilitate rapid processing by relevant technical personnel.

[0150] When judging the degree of pipeline blockage, the calculated pipeline transportation state value is compared with the blockage interval, and the pipeline blockage is judged according to the corresponding interval of the pipeline transportation state value;

[0151] When all pipeline transport status values ​​are within the normal transport interval (0, m], no adjustment is made;

[0152] When some pipeline transport status values ​​are in the suspected blockage interval and other pipeline transport status values ​​are in the normal transport interval, increase the pump pressure. The adjusted pump pressure is pressure YL i 1-1.2 times;

[0153] For example, the original pump pressure is 100MPa, and after adjustment, the pump pressure is 110-120MPa.

[0154] When the transport status values ​​of some pipelines are in the blocked interval, an alarm is issued and the pipelines whose transport status values ​​are in the blocked interval are marked;

[0155] The data acquisition unit also collects the resistivity of the paste filling material at the beginning and the end of the delivery pipeline, and calculates the resistivity change rate, which is resistivity change rate = (resistivity of the paste filling material at the beginning of the delivery pipeline - resistance of the paste filling material at the end of the delivery pipeline) / resistivity of the paste filling material at the beginning of the delivery pipeline × 100%. When the resistivity change rate exceeds 10%, the pump speed is adjusted. After adjustment, the pump speed = pump speed × (1 + resistivity change rate).

[0156] When settlement occurs, the aggregate in the upper layer decreases, and the resistivity changes. The greater the settlement, the more obvious the resistivity change. In order to reduce the risk of blockage caused by settlement, the speed needs to be increased.

[0157] Safety monitoring module: used to obtain pipeline data after the paste filling material is transported, calculate the pipeline risk factor Glfx based on the pipeline data, and determine whether the pipeline needs to be replaced based on the pipeline risk factor.

[0158] The pipeline data includes the ultrasonic flaw detection data of the stress position of the pipeline elbow and the friction coefficient of the pipeline.

[0159] The calculation formula of pipeline risk factor Glfx is as follows:

[0160]

[0161] Where h is the number of pipe wear areas, ms i is the defect signal value monitored in the i-th wear area, mj i is the area of ​​the i-th wear region. When the pipeline risk factor Glfx reaches the set replacement value, all pipelines are replaced.

[0162] ms i and mj i It can be obtained by analyzing the ultrasonic flaw detection data. This technology is the basic technology of pipeline flaw detection. This patent is the basic application of this technology and has not improved it, so no excessive description will be made.

[0163] During the normal transportation of paste filling materials, when the elbow loss reaches the set value, ordinary pipelines are also close to damage. For safety reasons, it is generally chosen to replace all transportation pipelines (underground pipelines are troublesome to replace and cannot be replaced at any time like above-ground pipelines. To avoid accidents, therefore, pipelines need to be replaced when they are damaged to a certain extent).

[0164] It is also possible to detect whether other pipes need to be replaced when replacing the elbow.

[0165] The security monitoring module can also be set to work when data is retrieved.

[0166] Example 2

[0167] like Figure 3 As shown, based on Example 1, this embodiment also provides a monitoring method for conveying coal mining paste filling materials, including the following steps:

[0168] Obtain historical monitoring data of paste filling material delivery and data of paste filling materials that need to be delivered in the future;

[0169] Based on the historical monitoring data of the transportation of the paste filling material, the resistance of the pipeline to the flow of the paste filling material and the rate of change of the resistance of the pipeline to the flow of the paste filling material over time during the transportation process are calculated;

[0170] Obtain the resistance of the pipeline to the flow of the paste filling material and the rate of change of the resistance of the pipeline to the flow of the paste filling material over time during transportation, and formulate a transportation plan;

[0171] Convey the paste filling material according to the conveying plan, collect the monitoring data generated during the conveying process, analyze and process the monitoring data, determine the pipeline conveying state value, and compare the conveying state value with the set blockage interval to determine the pipeline blockage degree. The real-time adjustment unit executes the corresponding adjustment strategy according to the pipeline blockage degree;

[0172] The pipeline data after the paste filling material is transported is obtained, and the pipeline risk factor Glfx is calculated according to the pipeline data, and it is determined whether the pipeline risk factor Glfx reaches the preset safety value. When the set replacement value is reached, all the conveying pipelines are replaced.

[0173] The above formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0174] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. A person of ordinary skill in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution.

[0175] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0176] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A monitoring system for conveying paste filling materials in coal mining, characterized in that: include: Data retrieval module: obtains historical monitoring data of paste filling material delivery and data of paste filling materials that need to be delivered in the future; Preliminary analysis module: Based on the historical monitoring data of the paste filling material transportation, calculate the resistance of the pipeline to the flow of the paste filling material and the change rate of the pipeline resistance to the flow of the paste filling material over time during the transportation process; Transportation prediction module: obtain the resistance of the pipeline to the flow of paste filling materials and the rate of change of the resistance of the pipeline to the flow of paste filling materials over time during transportation, formulate a transportation plan, and implement it according to the transportation plan; Comprehensive control module: including data acquisition unit, monitoring and analysis unit and real-time adjustment unit; The data acquisition unit obtains the monitoring data generated during the implementation of the transportation plan, and transmits the monitoring data to the monitoring and analysis unit for analysis and processing, determines the pipeline transportation state value, and compares the transportation state value with the set blockage interval to determine the pipeline blockage degree. The real-time adjustment unit executes the corresponding adjustment strategy according to the pipeline blockage degree; Safety monitoring module: used to obtain pipeline data after the paste filling material is transported, calculate the pipeline risk factor Glfx based on the pipeline data, and determine whether the pipeline needs to be replaced based on the pipeline risk factor.

2. A monitoring system for coal mining paste filling material transportation according to claim 1, characterized in that: The types of data monitored during the transportation of paste filling materials include pipeline transportation flow, pressure data at different positions of the pipeline, resistivity of paste filling materials at different positions and pipeline vibration data. The data of paste filling materials include average aggregate particle size, slurry density and particle density. The pipeline data includes ultrasonic flaw detection data at the stress position of the pipeline elbow and the friction coefficient of the pipeline.

3. A monitoring system for coal mining paste filling material transportation according to claim 2, characterized in that: The calculation formula of the pipeline resistance to the flow of paste filling material is as follows: In the formula, ZL 管道 is the resistance of the pipeline to the flow of paste filling materials, K is the error ratio caused by pipeline loss, 0≤K≤8%, n is the number of selected historical monitoring data, β is the impact data of the characteristics of the paste filling materials to be transported in the future on the resistance, is the total resistance of all horizontal pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all downward sloping pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all vertical pipes in the i-th group of data to the flow of paste filling materials, is the total resistance of all elbows in the i-th group of data to the flow of paste filling materials, α i The data on the influence of the properties of the paste filling material conveyed on the resistance in the i-th group of data; Among them, the calculation formula for the total flow resistance of all horizontal pipes to the paste filling material is as follows: In the formula, ZL 水平 is the total resistance of the horizontal pipeline to the flow of paste filling materials, a is the number of horizontal pipelines in the paste filling material delivery pipeline, △P i水平 is the pressure difference between the two ends of the i-th horizontal pipe, ρ is the density of the paste filling material, and g is the gravitational acceleration; The calculation formula for the total flow resistance of all downward inclined pipes to paste filling materials is as follows: In the formula, ZL 斜下 is the total resistance of the downward inclined pipeline to the flow of the paste filling material, b is the number of downward inclined pipelines in the paste filling material delivery pipeline, L i斜下 is the length of the i-th group of downward inclined pipes, θ i is the slope of the i-th group of downward sloping pipes, △P i斜下 is the pressure difference between the two ends of the i-th downward sloping pipe; The calculation formula of the total resistance of all vertical pipes to the flow of paste filling materials is as follows: In the formula, ZL 竖直 is the total resistance of the vertical pipeline to the flow of the paste filling material, c is the number of vertical pipelines in the paste filling material delivery pipeline, L i竖直 is the length of the i-th group of vertical pipes, △P i竖直 is the pressure difference between the two ends of the i-th vertical pipe; The calculation formula of the total resistance of all elbows to the flow of paste filling materials is as follows: In the formula, ZL 弯管 is the total resistance of all elbows to the flow of paste filling materials, d is the number of elbows in the paste filling material delivery pipeline, △P i弯管 is the pressure difference at both ends of the ith elbow, and △H is the height difference between the center points at both ends of the ith elbow.

4. A monitoring system for conveying coal mining paste filling materials according to claim 3, characterized in that: The calculation formula for the influence of the properties of the paste filling material to be transported in the future on the resistance is as follows: Where r is the average particle size of aggregate in the paste filling material, v is the movement speed of the paste filling material, and D is the diameter of the pipe.

5. A monitoring system for conveying coal mining paste filling materials according to claim 4, characterized in that: The formula for calculating the rate of change of the pipeline resistance to the flow of paste filling materials at the kth time point during transportation is as follows: In the formula, BHL i is the change rate of the resistance of the pipeline to the flow of the paste filling material at the i-th time point during the transportation process, ZL k管道 is the resistance of the pipeline to the flow of paste filling material at the kth time point.

6. A monitoring system for conveying coal mining paste filling materials according to claim 5, characterized in that: Formulating a transportation plan includes formulating the pump pressure and pump speed of the pumping equipment. The pump speed of the pumping equipment is set according to the speed v of the paste filling material movement. The pressure YL required for the paste filling material to flow at different time points is calculated based on the pipeline's resistance to the flow of the paste filling material and the rate of change of the pipeline's resistance to the flow of the paste filling material over time during transportation. i , the specific calculation formula is as follows; Y.L. i =ZL 管道 ×BHL i +YES Where AY is the error pressure data.

7. A monitoring system for conveying coal mining paste filling materials according to claim 6, characterized in that: The pipeline transportation state value includes the elbow transportation state value and other pipeline transportation state values; The calculation formulas for other pipeline transport status values ​​are as follows: In the formula, To monitor the average pressure data of the pipeline, is the predicted average pipeline pressure data; The calculation formula of the elbow conveying state value is as follows: In the formula, Zd JC is the monitored pipeline vibration data, Zd bz To set the standard vibration data of the pipeline when conveying paste filling materials.

8. A monitoring system for conveying coal mining paste filling materials according to claim 7, characterized in that: The congestion interval includes the normal transport interval (0, m], the suspected congestion interval (m, 2m], and the serious congestion interval (2m, +∞); When judging the degree of pipeline blockage, the calculated pipeline transportation state value is compared with the blockage interval, and the pipeline blockage is judged according to the corresponding interval of the pipeline transportation state value; When all pipeline transport status values ​​are within the normal transport interval (0, m], no adjustment is made; When some pipeline transport status values ​​are in the suspected blockage interval and other pipeline transport status values ​​are in the normal transport interval, increase the pump pressure. The adjusted pump pressure is pressure YL i 1-1.2 times; When the transport status values ​​of some pipelines are in the blocked interval, an alarm is issued and the pipelines whose transport status values ​​are in the blocked interval are marked; The data acquisition unit also collects the resistivity of the paste filling material at the beginning and the end of the delivery pipeline, and calculates the resistivity change rate, which is resistivity change rate = (resistivity of the paste filling material at the beginning of the delivery pipeline - resistance of the paste filling material at the end of the delivery pipeline) / resistivity of the paste filling material at the beginning of the delivery pipeline × 100%. When the resistivity change rate exceeds 10%, the pump speed is adjusted. After adjustment, the pump speed = pump speed × (1 + resistivity change rate).

9. A monitoring system for conveying coal mining paste filling materials according to claim 8, characterized in that: The calculation formula of pipeline risk factor Glfx is as follows: Where h is the number of pipe wear areas, ms i is the defect signal value monitored in the i-th wear area, mj i is the area of ​​the i-th wear region. When the pipeline risk factor Glfx reaches the set replacement value, all pipelines are replaced.

10. A method for monitoring the transportation of coal mining paste filling materials, using any system as claimed in any one of claims 1 to 9, characterized in that: The steps include: Obtain historical monitoring data of paste filling material delivery and data of paste filling materials that need to be delivered in the future; Based on the historical monitoring data of the transportation of the paste filling material, the resistance of the pipeline to the flow of the paste filling material and the rate of change of the resistance of the pipeline to the flow of the paste filling material over time during the transportation process are calculated; Obtain the resistance of the pipeline to the flow of the paste filling material and the rate of change of the resistance of the pipeline to the flow of the paste filling material over time during transportation, and formulate a transportation plan; Convey the paste filling material according to the conveying plan, collect the monitoring data generated during the conveying process, analyze and process the monitoring data, determine the pipeline conveying state value, and compare the conveying state value with the set blockage interval to determine the pipeline blockage degree. The real-time adjustment unit executes the corresponding adjustment strategy according to the pipeline blockage degree; The pipeline data after the paste filling material is transported is obtained, and the pipeline risk factor Glfx is calculated according to the pipeline data, and it is determined whether the pipeline risk factor Glfx reaches the preset safety value. When the set replacement value is reached, all the conveying pipelines are replaced.

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