Mine multi-source solid waste filling material precise dispensing method and system

Abstract

The application discloses a kind of mine multi-source solid waste filling material precision dispensing method and system, it is related to mine intelligent solid filling technical field.The information of coal mining speed, working face backfill gangue demand, present stage gangue conveying speed is obtained in real time by installing belt scale, speed sensor in each coal and material belt conveyor, each sensor real-time feedback information to control center server, control center server decides each source gangue conveying capacity according to each information, and the conveying speed and the amount of material of corresponding belt conveyor and feeder are automatically regulated by PLC.The method can realize the precise dispensing of multi-source solid waste filling material in the process of mine filling mining, so that the actual filling mining ratio reaches the preset value, ensures the filling quality, and effectively solves the problem of low filling material conveying precision and poor filling mining ratio control in mine solid filling mining.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of mine multi-source solid waste filling material precision dispensing method and system, belong to mine intelligent solid filling technical field. BACKGROUND

[0002] Comprehensive mechanized solid filling mining is to transport gangue, fly ash, loess, aeolian sand, construction waste and other solid waste to the goaf after coal mining for filling, to control the bending subsidence and breakage of overburden, so as to achieve the effect of reducing surface subsidence, protecting aquifer and ensuring safety in production while treating gangue and other solid waste, but the prerequisite for filling mining to achieve the above effects is to have a certain filling-mining ratio, and the filling-mining ratio is an important factor affecting the filling effect.

[0003] In actual production process, the thickness of coal seam is often variable, so the supply amount of filling material also needs to change to ensure that the designed filling-mining ratio is reached. When the traditional mine carries out filling mining, the control of filling-mining ratio is mostly fuzzy, and the filling material conveying amount is mainly adjusted by artificial observation and judgment. This judgment has the subjectivity of workers, and it is impossible to achieve precise supply of filling material, which may cause large difference between actual filling-mining ratio and designed value, and the allocation of filling material from different sources also mainly relies on artificial judgment, which is low in allocation efficiency. In view of the above problems, no effective solution has been proposed so far. SUMMARY

[0004] In view of the deficiencies of the prior art, a mine multi-source solid waste filling material precision dispensing method and system are provided to realize precise and automatic control of the conveying amount of solid waste from each source in the filling mining process, so as to make the actual filling-mining ratio close to the designed filling-mining ratio and ensure the filling effect.

[0005] SUMMARY: To achieve the above technical purpose, the mine multi-source solid waste filling material precision dispensing method of the present application acquires the information of coal mining speed, working face backfilling gangue demand and current gangue conveying speed in real time by installing belt scale and speed sensor on each coal conveying and material conveying belt conveyor, the sensors feed back the information to the control center server in real time, the control center server decides the gangue conveying amount from each source according to the information, and automatically controls the conveying speed and feeding amount of the corresponding belt conveyor and feeder through PLC,

[0006] The specific steps are as follows:

[0007] a. According to the actual backfilling demand, set the filling-mining mass ratio γ of goaf backfilling in the control center;

[0008] b. Monitor and acquire the information of unit time raw coal production M of working face, and transmit the information to the control center server to determine the coal mining speed of working face;

[0009] c、The control center calculates the total mass of filling material Q required by the working face per unit time by the raw coal production M per unit time, and the calculation method is as formula (1):

[0010] Q=Mγ (1)

[0011] In the formula: Q represents the total mass of filling material required by the working face, with the unit of t / h; M represents the raw coal production per unit time of the working face, with the unit of t / h; γ represents the preset filling and mining mass ratio.

[0012] d, Install a conveyor at the backfill of the bottom gangue bin of the feeding shaft, install a conveyor at the backfill of the underground washing site, install a conveyor at the backfill of the rock roadway excavation site, install a conveyor at the backfill of the rock roadway repair site, and monitor the real-time conveying speeds Q1, Q2, Q3, Q4 of the above four conveyors, which are transmitted to the control center server in real time;

[0013] e, Use the total mass of filling material required by the working face Q to check the actual total conveying speed Q' of each conveyor, and adjust the power P of each belt conveyor in real time to regulate the conveying speed Q of each source of solid waste filling material i , So as to meet the relationship shown in formula (2), and the power of each conveyor cannot exceed its upper limit after adjustment; In order to not affect the underground production, there are four sources of gangue for backfill, and the priority conveying order of the four sources of gangue conveying back to the working face is: underground washing gangue, rock roadway excavation gangue, rock roadway repair gangue, and ground gangue hill gangue.

[0014]

[0015] In the formula: Q represents the total mass of filling material required by the working face, with the unit of t / h; Q1 represents the conveying amount of underground washing gangue, with the unit of t / h; Q2 represents the conveying amount of rock roadway excavation gangue, with the unit of t / h; Q3 represents the conveying amount of rock roadway repair gangue, with the unit of t / h; Q4 represents the conveying amount of ground gangue hill gangue, with the unit of t / h;

[0016] By adjusting the power of each conveyor to change the conveying amount of each source of gangue, the relationship between the gangue conveying amount Q of the conveyor per unit time and the power P of the conveyor is shown in formula (3):

[0017]

[0018] In the formula, P is the total power of the conveyor, unit w; Q is the unit time gangue transportation quantity of the conveyor, unit kg / s; L is the total length of the conveyor, unit m; g is the gravity coefficient, taking 9.8 N / kg; μ is the load resistance coefficient of the conveyor; ω is the power loss coefficient of the conveyor; wherein, the load resistance coefficient μ of the conveyor represents the increase of the running resistance of the conveyor per unit load; the power loss coefficient ω of the conveyor represents the power loss of the conveyor due to its own structure, motor itself energy consumption, etc., generally 0.7-0.9.

[0019] Further, the setting of the filling-mining mass ratio γ needs to be determined according to the actual filling-mining production requirements of the mine, when the filling purpose is mainly to treat gangue and other solid wastes, the filling-mining mass ratio can be determined according to the solid waste output, and there is no fixed value; when the filling purpose is to control surface subsidence or water conservation mining, etc., the filling-mining mass ratio γ needs to be determined according to the requirements of surface subsidence control or water conservation, and the filling-mining mass ratio γ is greater than 0.8.

[0020] Further, the various monitoring information is transmitted to the control center through optical fibers or industrial internet.

[0021] Further, the unit time raw coal production M of the working face and the unit time gangue conveying speed of each conveyor can be obtained by installing a belt scale on the coal belt conveyor and each source solid waste filling material belt conveyor.

[0022] A control system of a mine multi-source solid waste filling material precise distribution method is arranged in a control center server, and includes a first control unit, a second control unit and a third control unit connected with each other;

[0023] The first control unit is used to calculate the total filling material mass Q required by the working face per unit time according to the unit time raw coal production M;

[0024] The second control unit is used to check the actual total conveying speed Q' of each conveyor through the total filling material mass Q required by the working face, and to feed back and adjust the power of each belt conveyor in real time, so as to control the conveying speed of each source solid waste filling material, so as to meet: Wherein, Q1 represents the conveying amount of underground washed gangue, Q2 represents the conveying amount of rock roadway tunneling gangue, Q3 represents the conveying amount of rock roadway repairing gangue, and Q4 represents the conveying amount of ground gangue mountain gangue; wherein, the conveying priority of the gangue backfilled into the working face is: underground washed gangue, rock roadway tunneling gangue, rock roadway repairing gangue, and ground gangue mountain gangue, and the conveying amount of each source of gangue cannot exceed the maximum power of each gangue conveyor;

[0025] The third control unit is used to adjust the power of each conveyor according to the demand of the gangue, and the relationship between the unit time gangue transportation quantity Q of the conveyor and the power P of the conveyor meets

[0026] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for precise distribution of backfill materials for multi-source solid waste in mines as described in any one of claims 1-4.

[0027] A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for precise distribution of backfill materials for multi-source solid waste in mines as described in any one of claims 1-4.

[0028] Beneficial Effects: This method precisely regulates the delivery volume of multi-source backfilling materials in real time based on coal production, ensuring the actual backfilling-to-production ratio is close to the design ratio, guaranteeing backfilling effectiveness, improving the efficiency of backfilling material allocation, and making material supply more efficient and rational. It is highly practical and has significant beneficial effects, enriching green mining theory, expanding the application scope and effectiveness of backfilling mining, promoting the automation and intelligence of fully mechanized solid backfilling, facilitating the widespread application of backfilling mining technology, and driving the development of green and intelligent mining. Attached Figure Description

[0029] Figure 1 This is a flowchart of the method for precise allocation of backfill materials for multi-source solid waste in mines according to the present invention; Detailed Implementation

[0030] The embodiments of this application will be further described below with reference to the accompanying drawings:

[0031] To protect surface buildings and structures, reduce surface subsidence caused by coal mining, and handle the accumulated gangue from the gangue pile, a certain mine decided to implement integrated mechanized solid backfill mining. To achieve gangue not being brought to the surface, the mine established a washing and sorting system underground, using a jigging method to perform preliminary sorting of raw coal. The resulting gangue is directly used for backfilling underground. The backfilling materials used in the mine mainly come from three sources: gangue from the surface gangue pile, gangue washed underground, and gangue from rock tunnel excavation. Among them, the gangue from the surface gangue pile is mixed with a certain proportion of loess, aeolian sand, and other solid wastes and transported underground through the feeding well.

[0032] like Figure 1 As shown, the present invention provides a method for precise distribution of backfill materials for multi-source solid waste in mines, the specific steps of which are as follows:

[0033] (a) The mine has a high output of gangue, and considering the goals of reducing surface subsidence and protecting surface buildings, the filling-mining mass ratio γ is set to 1;

[0034] (b) By installing an electronic belt scale on the coal conveyor belt at the bottom of the backfilling mining face, the raw coal output M per unit time of the working face is obtained in real time. Taking a certain moment t as an example, M = 268 t / h is measured, and the data is transmitted to the ground control center through the industrial Internet. The mine control center is located at the ground gangue station.

[0035] (c) Based on the preset filling-mining mass ratio and the real-time raw coal production per unit time of the working face obtained in (b), the ground control center calculates the total mass of filling material required for the working face filling using formula (1) as Q = M * 1 = 268 t / h;

[0036] (d) Install a gangue transport belt conveyor under the gangue bin at the bottom of the feeding shaft, under the gangue washing bin, and at the rock tunnel excavation site. Set up weighing points and belt scales at the gangue transport connecting roadway under the gangue bin at the bottom of the shaft, the gangue transport connecting roadway under the gangue washing bin, and the gangue transport roadway in the rock tunnel excavation site. Real-time acquisition of the transport speeds Q1, Q2, and Q3 of the gangue and other filling materials from various sources. At time t, the measured transport speeds are Q1 = 151 t / h, Q2 = 62 t / h, and Q3 = 43 t / h, respectively. Transmit the data to the ground control center via the industrial internet.

[0037] (e) The control center determines whether the current actual total conveying speed of the filling material is equal to the theoretical demand Q (Q = M). At time t, the actual total conveying speed is 256 t / h, which is less than the theoretical demand of 268 t / h. To ensure that underground coal mining, washing, and tunneling operations are not affected, the gangue from each source is processed in the following priority order: underground washed gangue, gangue from rock tunneling, and surface gangue-based materials. The conveying speed of each source of gangue is determined and adjusted according to this principle, and it satisfies the following formula:

[0038] Q = M = Q1 + Q2 + Q3 (4)

[0039] Where: Q—total mass of filling material required for working face filling, t / h;

[0040] M—Raw coal production per unit time at the working face, t / h;

[0041] Q1—Surface gangue-based material conveying speed, t / h;

[0042] Q2—Downhole gangue washing and conveying speed, t / h;

[0043] Q3—Speed ​​of conveying gangue during rock tunnel excavation, t / h;

[0044] The underground washing and sorting gangue conveying capacity is increased preferentially, and 12 t / h is needed to be increased. After adjustment, the gangue conveying speed of the underground washing and sorting gangue bin lower conveyor is 74 t / h (20.6 kg / s), which is less than the maximum conveying capacity 110 t / h. According to the measurement, the length L of the underground washing and sorting belt conveyor used in the mine is 800 m, the power loss coefficient ω is 0.8, and the load resistance coefficient μ is 0.3. Then the conveyor power can be adjusted to 60.1 kw in real time according to formula (5).

[0045]

[0046] In the formula, P is the total power of the conveyor, w; Q is the gangue transportation capacity of the conveyor per unit time, kg / s, which is 20.6 kg / s here; L is the total length of the conveyor, m, which is 800 m here; g is the gravity coefficient, which is 9.8 N / kg; μ is the load resistance coefficient of the conveyor, which is 0.3 here; ω i is the corresponding conveyor power loss coefficient (i = 1, 2, 3), which is 0.8 here.

Claims

1. A method for precise dosing of mine multi-source solid waste filling material, characterized in that: By installing belt scale and speed sensor on each coal and material belt conveyor, the information of coal mining speed, working face backfilling gangue demand, and current gangue conveying speed is obtained in real time. Each sensor feeds back the information to the control center server in real time. The control center server decides the gangue conveying amount of each source according to the information, and automatically controls the conveying speed and feeding amount of the corresponding belt conveyor and feeder through PLC. The specific steps are as follows: a. According to the actual backfilling demand, set the backfilling mining quality ratio γ in the control center; b. Monitor and obtain the information of unit time raw coal production M of the working face, and transmit the information to the control center server to determine the coal mining speed of the working face; c. The control center calculates the total quality Q of the filling material required by the working face per unit time according to the unit time raw coal production M, and the calculation method is as formula (1): （1）， In the formula, Q represents the total quality of the filling material required by the working face, with the unit of t / h; M represents the unit time raw coal production of the working face, with the unit of t / h; γ represents the preset mining quality ratio; d. Install conveyors at the gangue bin at the bottom of the feeding shaft, at the backfilling place of the underground washing place, at the backfilling place of the rock roadway driving place, and at the backfilling place of the rock roadway repairing place, and monitor and obtain the real-time conveying speeds Q1, Q2, Q3, and Q4 of the above four conveyors. The monitoring value is transmitted to the control center server in real time; e、Using the total mass of filling material required by the working face Q to check the actual total conveying speed Q' of each conveyor, and real-time feedback adjusting the power P of each belt conveyor, so as to regulate the conveying speed of solid waste filling material from each source , so that it satisfies the relationship as shown in formula (2), and the power of each conveyor after adjustment cannot exceed its upper limit. In order to not affect the underground production, there are four sources of gangue for backfilling, and the conveying sequence of the four sources of gangue conveying to the backfilling working face is: underground washing gangue, rock roadway driving gangue, rock roadway repairing gangue, and ground gangue mountain gangue; （2）， In the formula, Q represents the total quality of the filling material required by the working face, with the unit of t / h; Q1 represents the conveying amount of the underground washing gangue, with the unit of t / h; Q2 represents the conveying amount of the rock roadway driving gangue, with the unit of t / h; Q3 represents the conveying amount of the rock roadway repairing gangue, with the unit of t / h; Q4 represents the conveying amount of the ground gangue mountain gangue, with the unit of t / h; The conveying amount of each source of gangue is changed by adjusting the power of each conveyor, and the relationship between the unit time gangue conveying amount Q of the conveyor and the power P of the conveyor is shown in formula (3): （3）， In the formula, P is the total power of the conveyor, with the unit of w; Q is the unit time gangue conveying amount of the conveyor, with the unit of kg / s; L is the total length of the conveyor, with the unit of m; g is the gravity coefficient, which is 9.8 N / kg; μ is the load resistance coefficient of the conveyor; ω is the power loss coefficient of the conveyor; wherein, the load resistance coefficient μ of the conveyor represents the increase of the running resistance of the conveyor per unit load; the power loss coefficient ω of the conveyor represents the power loss of the conveyor due to its own structure and the energy consumption of the motor, which is 0.7-0.

9.

2. The method according to claim 1, characterized in that: The setting of the mining quality ratio γ needs to be determined according to the actual filling mining production demand of the mine. When the filling purpose is to treat gangue and other solid waste, the mining quality ratio can be determined according to the solid waste output, and there is no specific value. When the filling purpose is to control surface subsidence or water preservation mining, the mining quality ratio γ needs to be determined according to the requirements of surface subsidence control or water preservation, and the mining quality ratio γ is greater than 0.

8.

3. The method according to claim 1, characterized in that: The monitoring information is transmitted to the control center through optical fiber or industrial internet.

4. The method according to claim 1, characterized in that: The raw coal output per unit time M of the working face and the gangue conveying speed per unit time of each conveyor are obtained by installing belt scales on the coal belt conveyor and the solid waste filling material belt conveyor of each source.

5. A control system for implementing the method of claim 2 for precise dosing of mine multi-source solid waste filling material, characterized in that: The first control unit, the second control unit and the third control unit are connected with each other. The first control unit is used to calculate the total mass Q of the filling material required by the working face per unit time according to the raw coal output per unit time M. The second control unit is used to check the actual total conveying speed Q' of each conveyor by the total mass Q of the required filling material of the working face, to feed back and adjust the power of each belt conveyor in real time, so as to control the conveying speed of the solid waste filling material from each source, so as to meet: Wherein Q1 represents the conveying amount of the underground washed gangue, Q2 represents the conveying amount of the rock roadway tunneling gangue, Q3 represents the conveying amount of the rock roadway repairing gangue, and Q4 represents the conveying amount of the ground gangue dump gangue; wherein the conveying priority of the gangue backfilled into the working face is: underground washed gangue, rock roadway tunneling gangue, rock roadway repairing gangue, and ground gangue dump gangue, and the conveying amount of the gangue from each source cannot exceed the maximum power of the gangue conveyor. The third control unit is used to adjust the power of each conveyor according to the demand quantity of the gangue, and the relationship between the gangue transportation quantity Q of the conveyor per unit time and the power P of the conveyor satisfies .

6. An electronic device, comprising: The program is executed by the processor to realize the mine multi-source solid waste filling material accurate allocation method according to any one of claims 1-4.

7. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to realize the mine multi-source solid waste filling material accurate allocation method according to any one of claims 1-4.

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