CN117738715A - Method for adjusting air supply quantity of air points for mines according to needs - Google Patents
Method for adjusting air supply quantity of air points for mines according to needs Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims abstract description 51
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 56
- 239000007789 gas Substances 0.000 claims description 31
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 28
- 239000001569 carbon dioxide Substances 0.000 claims description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 26
- 238000009423 ventilation Methods 0.000 claims description 16
- 230000005641 tunneling Effects 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 150000002431 hydrogen Chemical class 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Abstract
The invention relates to a method for adjusting air supply quantity of an air point for a mine as required, which belongs to the technical field of mine operation and comprises the following steps: s1: making a mine wind point environment monitoring scheme, and installing monitoring equipment according to the wind point type; s2: calculating the real-time air quantity required by the wind point according to the wind point environment monitoring data; s3: acquiring the real-time air supply quantity monitored by the air consumption point, comparing the real-time air supply quantity with the real-time air demand quantity, and calculating the real-time air quantity regulating quantity of the air consumption point; s4: checking the adjustment redundancy and the number of the wind flow adjustment devices; s5: judging whether the air quantity adjustment meets the standard according to the air quantity monitoring equipment at the air consumption site; s6: and if the air quantity adjustment does not reach the standard, repeating the steps S3 to S5 until the air quantity adjustment reaches the standard.
Description
Technical Field
The invention belongs to the technical field of mine operation, and relates to a method for adjusting air supply quantity of an air point for a mine as required.
Background
In mine mining, it is necessary to supply a certain amount of fresh air into the mine in order to ensure ventilation of the air in the mine and to provide sufficient oxygen. The mine ventilation system is an important component link of mine safety production, and the efficient and reliable ventilation system can play key roles of providing fresh airflow for underground operators, adjusting working environment temperature, diluting and removing toxic and harmful gases and the like; at present, mine ventilation is generally extraction type ventilation, one or more main ventilators provide power by utilizing negative pressure, and various wind control devices are installed in underground roadways to promote fresh wind flow to each wind using place of a mine so as to achieve a preset ventilation effect; however, since the ventilation system is a variable system, the original fixed air volume ventilation mode cannot meet the state of the existing ventilation system, and the conditions of all air consumption places of a mine are different, so that ventilation hidden dangers such as insufficient air supply and accumulation of toxic and harmful gases can be generated in local areas, the existing ventilation system cannot be accurately adjusted according to actual requirements, flexibility is lacking, dynamic adjustment cannot be carried out according to environmental parameters monitored in real time, and potential hidden dangers are brought to the safety of miners.
Disclosure of Invention
Accordingly, the invention aims to provide a method for adjusting the air supply quantity of the air point for the mine according to the requirement
In order to achieve the above purpose, the present invention provides the following technical solutions:
the method for adjusting the air supply quantity of the air points for the mine according to the requirement comprises the following steps:
s1: making a mine wind point environment monitoring scheme, and installing monitoring equipment according to the wind point type;
s2: calculating the real-time air quantity required by the wind point according to the wind point environment monitoring data;
s3: acquiring the real-time air supply quantity monitored by the air consumption point, comparing the real-time air supply quantity with the real-time air demand quantity, and calculating the real-time air quantity regulating quantity of the air consumption point;
s4: checking the adjustment redundancy and the number of the wind flow adjustment devices;
s5: judging whether the air quantity adjustment meets the standard according to the air quantity monitoring equipment at the air consumption site;
s6: and if the air quantity adjustment does not reach the standard, repeating the steps S3 to S5 until the air quantity adjustment reaches the standard.
Further, the wind-using place type in the step S1 comprises a coal face, a tunneling face and a chamber; the monitoring equipment comprises a wind speed sensor, a methane sensor, a carbon dioxide sensor, a carbon monoxide sensor, a temperature sensor, a hydrogen sensor and a personnel positioning device.
Further, in step S2, the calculating the real-time air volume required by the wind spot according to the wind spot environment monitoring data specifically includes the following steps:
s21: when the wind point type is a coal face, the calculation formula is as follows:
according to meteorological conditions, calculating:
Q cf ＝60×70％×v cf ×S cf ×k ch ×k cl
wherein: v cf Represents the wind speed measured by a wind speed sensor S cf Represents the average effective cross-sectional area, k ch Represents the height-adjustment coefficient, k cl Representing a length adjustment coefficient;
calculated according to the gas emission amount:
Q cf ＝100×q cg ×k cg
wherein: q cg The average absolute gas emission in the air flow of the air return tunnel is represented, and the average absolute gas emission is obtained according to the monitoring values of a methane sensor and an air speed sensor; k (k) cg A standby air volume coefficient for indicating uneven gas emission;
calculated as carbon dioxide emission:
Q hf ＝67×q hc ×k hc
wherein: q hc The average absolute carbon dioxide emission quantity in the return air flow is represented, and is obtained according to monitoring values of a carbon dioxide sensor and a wind speed sensor; k (k) hc A standby wind coefficient indicating non-uniform carbon dioxide flooding;
according to the number of workers
Q cf ≥4N cf
Wherein: n (N) cf The maximum number of people working simultaneously is represented, and the number of people is monitored through a personnel positioning device;
s22: when the wind point type is a tunneling working face, the calculation formula is as follows:
according to the gas emission quantity
Q hf ＝100×q hg ×k hg
Wherein: q hg The average absolute gas emission quantity in the return air flow is represented, and is obtained according to monitoring values of a methane sensor and a wind speed sensor; k (k) hg A standby air volume coefficient for indicating uneven gas emission of a tunneling working face;
calculated as carbon dioxide emission:
Q hf ＝67×q hc ×k hc
q hc the average absolute carbon dioxide emission quantity in the return air flow is represented, and is obtained according to monitoring values of a carbon dioxide sensor and a wind speed sensor; k (k) hc A standby wind coefficient indicating non-uniform carbon dioxide flooding;
according to the number of workers:
Q af ≥4N hf
wherein: n (N) hf The maximum number of people working simultaneously on the tunneling working face is represented, and the number of people is monitored through a personnel positioning device;
s23: when the wind point type is a chamber, the calculation formula is as follows:
calculating according to the required air volume of the charging chamber
Q er ＝200q hy
Wherein: q (Q) er Indicating the required air quantity of the charging chamber; q hy The method comprises the steps of representing the hydrogen quantity generated by a charging chamber during charging, and obtaining a monitoring value of a hydrogen sensor;
calculating according to the heating value of the chamber:
wherein: q (Q) mr Indicating the required air quantity of the electromechanical room; Σw represents the total power of the motor or transformer operating in the electromechanical chamber; θ represents the heating coefficient of the electromechanical pillbox; ρ represents the air density; c (C) p The constant pressure specific heat of air is represented; delta t represents the temperature difference of the inlet and return air flows of the electromechanical code chamber and is obtained according to the monitoring value of the temperature sensor;
s24: when the wind point type is a wind roadway: the calculation formula is as follows:
according to the gas emission quantity
Q rl ＝133q rg ×k rg
Wherein: q rg The average absolute gas emission quantity is represented, and is obtained according to monitoring values of a methane sensor and a wind speed sensor; k (k) rg A standby air volume coefficient indicating non-uniformity of gas;
according to the number of workers:
Q cf ≥4N cf
wherein: n (N) cf The maximum number of people who work simultaneously on the coal face is represented, and the number of people is monitored through a personnel positioning device;
real-time air quantity of air consumption place
Q Is required to ＝Max{Q cf ，Q hf ，Q af ，Q er ，Q mr ，，Q rl }
Q Is required to And the maximum value is obtained after the required air quantity is calculated according to each condition.
In step S3, the supply and demand difference is calculated according to the real-time monitoring data, and the calculation formula is as follows:
Q difference of supply and demand ＝|Q Is required to -Q Feed device |
Wherein Q is Feed device The air quantity is supplied by the air point.
Further, the step S4 specifically includes the following steps:
s41: the redundancy of wind flow ventilation facilities and equipment, namely the adjustable quantity of wind quantity, can be adjusted near the wind using place;
s42: if the adjustable quantity is larger than the required adjustable quantity, adjusting the equipment and regulating the air quantity; and if the adjustable quantity is smaller than the required adjustable quantity, adjusting the adjustable equipment at the upper stage of the equipment, wherein the final level is the mine main ventilator.
Further, in step S5, whether the air volume adjustment meets the standard is determined by calculating the air volume at the place according to the wind speed monitoring sensor at the place of the air consumption, and the calculation formula is as follows:
Q feed device ＝60*V*S
Wherein V is the monitored wind speed; s is the cross-sectional area;
judgment of Q Feed device If the air quantity reaches the preset air quantity, if the error between the monitored air quantity and the real-time air quantity value is not more than 5%, the air quantity is regulated to reach the standard.
The invention has the beneficial effects that: the method is based on the environmental monitoring of the mine wind-using place, the real-time wind volume demand of the mine is calculated, and the parallel wind volume regulation facility equipment is used for optimizing the wind supply mode aiming at the environmental change, so that the wind flow stability and reliability of the wind-using place are ensured, and the purposes of disaster reduction and synergy are achieved; and data support is provided for the optimized regulation of the air quantity of the ventilation system in the normal period, and effective control means is provided for ventilation supply and demand linkage.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for adjusting air supply quantity of a mine air point according to requirements;
FIG. 2 is a flow chart of the calculation of the required air volume;
FIG. 3 is a flow diagram of a wind flow regulation facility verification;
FIG. 4 is a diagram of a hierarchical architecture of a wind flow regulating facility.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1:
as shown in fig. 1, the method for adjusting the wind point for mine ventilation according to the requirement comprises the following steps:
s1: making a mine wind spot environment monitoring scheme and installing monitoring equipment;
s2: calculating the real-time air quantity required by the wind point according to the wind point environment monitoring data;
s3: acquiring the real-time air supply quantity monitored by the air consumption point, comparing the real-time air supply quantity with the real-time air demand quantity, and calculating the real-time air quantity regulating quantity of the air consumption point;
s4: checking the adjustment redundancy of the air flow adjustment implementation equipment and checking the quantity of the adjustment equipment;
s5: judging whether the air quantity adjustment meets the standard according to the air quantity monitoring equipment at the air consumption site;
s6: and (5) when the air quantity adjustment does not reach the standard, repeating the steps S3-S5, and ending when the air quantity adjustment reaches the standard.
Further describing, the installation monitoring device in step S1 is identified as: according to the type of the mine wind point, the non-communication monitoring equipment is installed; (1) the type is coal face, and a methane sensor, a wind speed sensor, a personnel positioning device, a temperature sensor and a carbon dioxide sensor are arranged; (2) the type is a tunneling working face, and a methane sensor, a wind speed sensor, a personnel positioning device, a temperature sensor and a carbon dioxide sensor are arranged; (3) the type is a chamber, and a hydrogen sensor, a temperature sensor and a wind speed sensor are installed; (4) the type is a roadway, an armored alkane sensor, a wind speed sensor and a personnel positioning device.
Further describing, in step S4, the device adjusts redundancy, which is identified as: the device adjusts the wind flow to the maximum working efficiency.
Further, in step S6, the air volume adjustment does not reach the standard and the steps are repeated, which are identified as follows: and after judging that the air quantity regulation does not reach the standard, recalculating the air quantity regulation quantity, and controlling the air flow regulation facility equipment in a linkage way.
Example 2:
(1) As shown in fig. 2, the wind volume adjustment calculation at the wind site comprises the following steps: confirming the type of the wind quantity of the wind site; and calculating the wind quantity required by the wind consumption site according to the environment monitoring data. When the wind point type is a coal face, the calculation formula is as follows:
(1) according to meteorological conditions, calculating:
Q cf ＝60×70％×v cf ×S cf ×k ch ×k cl
wherein:
v cf : and the wind speed, m/s, is obtained according to the monitoring value of the wind speed sensor.
S cf : average effective cross-sectional area, m 2 ；
k ch : collecting a height adjustment coefficient;
k cl : and (5) a length adjustment coefficient.
(2) Calculated according to the gas emission amount:
Q cf ＝100×q cg ×k cg
wherein:
q cg : average absolute gas emission in air flow of return tunnel, m 3 And/min, obtaining according to the monitoring value of the methane sensor and the wind speed sensor.
k cg : and (5) a standby air volume coefficient of uneven gas emission.
(3) Calculated as carbon dioxide emission:
Q hf ＝67×q hc ×k hc
wherein:
q hc : average absolute carbon dioxide emission in return air flow, m 3 And/min, acquiring according to the monitoring value of the carbon dioxide sensor and the wind speed sensor.
k hc : carbon dioxide gushes out of the non-uniform backup wind coefficient.
(4) According to the number of workers
Q cf ≥4N cf
Wherein:
N cf : the maximum number of people working simultaneously, the number of people monitored by the personnel positioning device is obtained;
(2) When the wind point type is a tunneling working face, the calculation formula is as follows:
(1) according to the gas emission quantity
Q hf ＝100×q hg ×k hg
Wherein:
q hg : average absolute gas emission amount m in return air flow 3 And/min, acquiring according to the monitoring value of the methane sensor and the wind speed sensor.
k hg : the gas emission of the tunneling working face is uneven, and the standby air quantity coefficient is equal.
(2) Calculated as carbon dioxide emission:
Q hf ＝67×q hc ×k hc
q hc : average absolute carbon dioxide emission in return air flow, m 3 And/min, acquiring according to the monitoring value of the carbon dioxide sensor and the wind speed sensor.
k hc : and the carbon dioxide gushes out of the uneven standby air coefficient, and under normal production conditions.
(3) According to the number of workers:
Q af ≥4N hf
wherein:
N hf : the maximum number of people working simultaneously on the tunneling working face is obtained, and the number of people monitored by the personnel positioning device is obtained;
(3) When the wind point type is a chamber, the calculation formula is as follows:
(1) calculating according to the required air volume of the charging chamber
Q er ＝200q hy
Wherein:
Q er : the charging chamber needs air quantity m 3 /min；
q hy : the hydrogen quantity m generated by the charging chamber during charging 3 A/min, obtaining a monitoring value of a hydrogen sensor;
(2) calculating according to the heating value of the chamber:
wherein:
Q mr : required air quantity of electromechanical room, m 3 /min；
Σw: the total power (calculated as the maximum value throughout the year) of the motor (or transformer) operating in the electromechanical room, kW;
θ: the heating coefficient of the electromechanical pillbox and the numerical value are shown in Table 4;
ρ: air density is generally taken as ρ=1.20 kg/m 3 ；
C p : the specific heat of air at constant pressure is generally c p ＝1.0006kJ/(kg·K)；
Δt: and the temperature difference between the inlet air flow and the return air flow of the electromechanical code chamber is obtained according to the monitoring value of the temperature sensor.
(4) When the wind point type is a wind roadway, the calculation formula is as follows:
(1) according to the gas emission quantity
Q rl ＝133q rg ×k rg
Wherein:
q rg : average absolute gas emission amount m 3 And/min, obtaining according to the monitoring value of the methane sensor and the wind speed sensor.
k rg : the standby air volume coefficient of the uneven gas is 1.2 to 1.3;
(2) according to the number of workers:
Q cf ≥4N cf
wherein:
N cf : coal face simultaneous coal faceThe maximum number of people in work is obtained, and the number of people monitored by the personnel positioning device is obtained;
finally:
real-time air quantity Q of air consumption place Is required to ＝Max{Q cf ，Q hf ，Q af ，Q er ，Q mr ，，Q rl }
Q Is required to And the maximum value is obtained after the required air quantity is calculated according to each condition.
In step S3, the method for acquiring the real-time air supply quantity of the air point monitors the real-time air supply quantity, compares the real-time air supply quantity with the real-time air demand quantity, and calculates the real-time air quantity adjustment quantity of the air point comprises the following steps: the supply and demand difference is calculated according to the real-time monitoring data, and the calculation formula is as follows:
Q difference of supply and demand ＝|Q Is required to -Q Feed device |
Wherein Q is Feed device The air quantity is supplied by the air point.
S3, judging whether the air quantity is required to be regulated or not, wherein the judging conditions are as follows: q (Q) Difference of supply and demand Greater than Q Feed device 5% of (C).
S4 if S3 results in yes, the adjustment amount is determined to be Q Difference of supply and demand 。
Example 3:
as shown in fig. 3 and 4, the method for checking the adjustment redundancy of the air flow adjustment implementation device and checking the number of the adjustment devices is as follows:
according to the wind flow regulating quantity determined by the wind using place, (1) judging whether the maximum regulating quantity is larger than the wind quantity required by the wind using place or not; (2) if the maximum regulating quantity is larger than the air quantity required by the wind application place, regulating the current level regulating and controlling facilities; (3) and if the maximum regulating quantity is smaller than the air quantity required by the wind-using place, the wind flow regulating and controlling facilities of the upper stage are regulated upwards until the main ventilator regulates and controls (one stage). According to the wind speed monitoring sensor of the wind consumption place, the wind supply quantity of the place is calculated, and the calculation formula is as follows: q (Q) Feed device =60×v×s, where V is the monitored wind speed and S is the cross-sectional area. Judgment of Q Feed device If the air quantity reaches the preset air quantity, if the error between the monitored air quantity and the real-time air quantity value is not more than 5%, the air quantity is regulated to reach the standard.
Those of ordinary skill in the art will appreciate that all or some of the steps in the methods of the above embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, where the program may be executed to implement the steps of the method, where the storage medium includes: ROM/RAM, magnetic disks, optical disks, etc.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (6)
1. The method for adjusting the air supply quantity of the air points for the mine according to the requirement is characterized by comprising the following steps of: the method comprises the following steps:
s1: making a mine wind point environment monitoring scheme, and installing monitoring equipment according to the wind point type;
s2: calculating the real-time air quantity required by the wind point according to the wind point environment monitoring data;
s3: acquiring the real-time air supply quantity monitored by the air consumption point, comparing the real-time air supply quantity with the real-time air demand quantity, and calculating the real-time air quantity regulating quantity of the air consumption point;
s4: checking the adjustment redundancy and the number of the wind flow adjustment devices;
s5: judging whether the air quantity adjustment meets the standard according to the air quantity monitoring equipment at the air consumption site;
s6: and if the air quantity adjustment does not reach the standard, repeating the steps S3 to S5 until the air quantity adjustment reaches the standard.
2. The method for on-demand adjustment of air supply quantity of air points for mines according to claim 1, wherein the method comprises the following steps: the wind-using place type comprises a coal face, a tunneling face and a chamber in the step S1; the monitoring equipment comprises a wind speed sensor, a methane sensor, a carbon dioxide sensor, a carbon monoxide sensor, a temperature sensor, a hydrogen sensor and a personnel positioning device.
3. The method for on-demand adjustment of air supply quantity of air points for mines according to claim 1, wherein the method comprises the following steps: the step S2 of calculating the real-time wind demand of the wind point according to the wind point environment monitoring data specifically comprises the following steps:
s21: when the wind point type is a coal face, the calculation formula is as follows:
according to meteorological conditions, calculating:
Q cf ＝60×70％×v cf ×S cf ×k ch ×k cl
wherein: v cf Represents the wind speed measured by a wind speed sensor S cf Represents the average effective cross-sectional area, k ch Represents the height-adjustment coefficient, k cl Representing a length adjustment coefficient;
calculated according to the gas emission amount:
Q cf ＝100×q cg ×k cg
wherein: q cg The average absolute gas emission in the air flow of the air return tunnel is represented, and the average absolute gas emission is obtained according to the monitoring values of a methane sensor and an air speed sensor; k (k) cg A standby air volume coefficient for indicating uneven gas emission;
calculated as carbon dioxide emission:
Q hf ＝67×q hc ×k hc
wherein: q hc The average absolute carbon dioxide emission quantity in the return air flow is represented, and is obtained according to monitoring values of a carbon dioxide sensor and a wind speed sensor; k (k) hc A standby wind coefficient indicating non-uniform carbon dioxide flooding;
according to the number of workers
Q cf ≥4N cf
Wherein: n (N) cf The maximum number of people working simultaneously is represented, and the number of people is monitored through a personnel positioning device;
s22: when the wind point type is a tunneling working face, the calculation formula is as follows:
according to the gas emission quantity
Q hf ＝100×q hg ×k hg
Wherein: q hg The average absolute gas emission quantity in the return air flow is represented, and is obtained according to monitoring values of a methane sensor and a wind speed sensor; k (k) hg A standby air volume coefficient for indicating uneven gas emission of a tunneling working face;
calculated as carbon dioxide emission:
Q hf ＝67×q hc ×k hc
q hc the average absolute carbon dioxide emission quantity in the return air flow is represented, and is obtained according to monitoring values of a carbon dioxide sensor and a wind speed sensor; k (k) hc A standby wind coefficient indicating non-uniform carbon dioxide flooding;
according to the number of workers:
Q af ≥4N hf
wherein: n (N) hf The maximum number of people working simultaneously on the tunneling working face is represented, and the number of people is monitored through a personnel positioning device;
s23: when the wind point type is a chamber, the calculation formula is as follows:
calculating according to the required air volume of the charging chamber
Q er ＝200q hy
Wherein: q (Q) er Indicating the required air quantity of the charging chamber; q hy The method comprises the steps of representing the hydrogen quantity generated by a charging chamber during charging, and obtaining a monitoring value of a hydrogen sensor;
calculating according to the heating value of the chamber:
wherein: q (Q) mr Indicating the required air quantity of the electromechanical room; Σw represents the total power of the motor or transformer operating in the electromechanical chamber; θ represents the heating coefficient of the electromechanical pillbox; ρ represents the air density; c (C) p The constant pressure specific heat of air is represented; delta t represents the temperature difference of the inlet and return air flows of the electromechanical code chamber and is obtained according to the monitoring value of the temperature sensor;
s24: when the wind point type is a wind roadway: the calculation formula is as follows:
according to the gas emission quantity
Q rl ＝133q rg ×k rg
Wherein: q rg The average absolute gas emission quantity is represented, and is obtained according to monitoring values of a methane sensor and a wind speed sensor; k (k) rg A standby air volume coefficient indicating non-uniformity of gas;
according to the number of workers:
Q cf ≥4N cf
wherein: n (N) cf The maximum number of people who work simultaneously on the coal face is represented, and the number of people is monitored through a personnel positioning device;
real-time air quantity of air consumption place
Q Is required to ＝Max{Q cf ，Q hf ，Q af ，Q er ，Q mr ，，Q rl }
Q Is required to And the maximum value is obtained after the required air quantity is calculated according to each condition.
4. The method for on-demand adjustment of air supply quantity of air points for mines according to claim 1, wherein the method comprises the following steps: in step S3, the supply-demand difference is calculated according to the real-time monitoring data, and the calculation formula is as follows:
Q difference of supply and demand ＝|Q Is required to -Q Feed device |
Wherein Q is Feed device The air quantity is supplied by the air point.
5. The method for on-demand adjustment of air supply quantity of air points for mines according to claim 1, wherein the method comprises the following steps: the step S4 specifically includes the following steps:
s41: the redundancy of wind flow ventilation facilities and equipment, namely the adjustable quantity of wind quantity, can be adjusted near the wind using place;
s42: if the adjustable quantity is larger than the required adjustable quantity, adjusting the equipment and regulating the air quantity; and if the adjustable quantity is smaller than the required adjustable quantity, adjusting the adjustable equipment at the upper stage of the equipment, wherein the final level is the mine main ventilator.
6. The method for on-demand adjustment of air supply quantity of air points for mines according to claim 1, wherein the method comprises the following steps: in the step S5, whether the air volume adjustment meets the standard is judged by calculating the air volume of the place according to the wind speed monitoring sensor of the place where the air is used, and the calculation formula is as follows:
Q feed device ＝60*V*S
Wherein V is the monitored wind speed; s is the cross-sectional area;
judgment of Q Feed device If the air quantity reaches the preset air quantity, if the error between the monitored air quantity and the real-time air quantity value is not more than 5%, the air quantity is regulated to reach the standard.
Priority Applications (1)
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| CN202311690170.2A CN117738715A (en) | 2023-12-11 | 2023-12-11 | Method for adjusting air supply quantity of air points for mines according to needs |
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