CN-122014325-A - Comprehensive digging surface submerged foam regulating system based on real-time dust concentration monitoring

CN122014325ACN 122014325 ACN122014325 ACN 122014325ACN-122014325-A

Abstract

The invention provides a comprehensive digging surface submerged foam regulating system based on real-time dust concentration monitoring, belongs to the technical field of comprehensive digging flour dust treatment in coal mines, and aims to solve the problems of monitoring one side, lag in regulation, poor parameter adaptability and unstable dust settling effect of the conventional comprehensive digging surface foam dust settling system. The system comprises a global dust concentration monitoring module, a submerged foam generation injection module, a multi-parameter cooperative regulation module and a main control module, dust distribution data is obtained through full-section monitoring, the main control module generates regulation instructions in combination with working conditions, the multi-parameter cooperative regulation module synchronously regulates foam related parameters, the injection module forms a full-section submerged foam barrier, and the full-section submerged foam barrier is matched with closed-loop feedback and fault redundancy protection to realize accurate dust treatment. The full working condition of the fully-mechanized coal mining machine is adapted, the stability of the dust fall effect is improved, the resource consumption is reduced, the reliability of the system is enhanced, and the underground operation environment is improved.

Inventors

LU ZHONGLIANG
JIA JINZHANG
JIA TINGGUI
Yao Zegang
WEI HONGYIN

Assignees

河南理工大学

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (10)

1. Comprehensive face submerged foam adjusting system based on real-time dust concentration monitoring, which is characterized by comprising a global dust concentration monitoring module, a submerged foam generation injection module, a multi-parameter cooperative adjusting module and a main control module, wherein: the full-area dust concentration monitoring module is arranged at full-section measuring points of the fully-mechanized coal mining face and is used for collecting full-dust concentration and respiratory dust concentration data of different areas of the fully-mechanized coal mining face in real time and transmitting the collected concentration data to the main control module in real time; the main control module is respectively and electrically connected with the global dust concentration monitoring module and the multi-parameter cooperative adjustment module, and is used for receiving concentration data, generating a multi-parameter adjustment instruction by combining a preset dust concentration threshold value and comprehensive tunneling working condition data, and transmitting the adjustment instruction to the multi-parameter cooperative adjustment module; The multi-parameter cooperative adjusting module is connected with the pipeline and the control of the submerged foam generating and spraying module and is used for receiving an adjusting instruction of the main control module and synchronously adjusting the foaming wind pressure, the liquid supply flow, the proportioning concentration of the foaming agent and the spraying coverage parameter of the submerged foam generating and spraying module; The submerged foam generation injection module is arranged at the tunneling end of the fully-mechanized coal mining machine and the periphery of the full-section of the fully-mechanized coal mining surface, and is used for receiving the adjustment output of the multi-parameter cooperative adjustment module, generating submerged foam with corresponding parameters, and injecting the submerged foam to the dust-producing area of the fully-mechanized coal mining surface to form the full-section submerged dust-settling barrier.
2. The comprehensive dust concentration monitoring system based on real-time dust concentration monitoring is characterized by comprising a plurality of groups of laser dust detection substations, a data acquisition and transmission unit and a working condition linkage calibration unit, wherein the groups of laser dust detection substations are respectively arranged at preset measuring points of the end of a cutting part of the comprehensive excavator, the operating position of a driver of the comprehensive excavator, an upper air opening on the return air side of the comprehensive excavator, a lower air opening on the return air side of the comprehensive excavator and two sides of a roadway of the comprehensive excavator, the data acquisition and transmission unit is used for respectively acquiring the total dust and respiratory dust concentration data of a dust production source, a personnel operating area and a roadway diffusion area, the data acquisition and transmission unit is used for transmitting the concentration data of the substations to a main control module after time synchronization, and the working condition linkage calibration unit is used for acquiring the running current and running speed data of a cutting motor of the comprehensive excavator, dynamically calibrating the concentration data and eliminating the interference of operation vibration on the detection precision.
3. The comprehensive tunneling surface submerged foam adjusting system based on real-time dust concentration monitoring, which is disclosed by claim 1, is characterized in that a dust concentration grading adjusting and controlling unit and a working condition matching unit are arranged in the main control module, a plurality of groups of dust concentration threshold intervals which are gradually increased are preset in the dust concentration grading adjusting and controlling unit, corresponding foam adjusting and controlling parameter sets are matched for different concentration threshold intervals, the working condition matching unit is connected to a control system of the comprehensive tunneling machine, working condition data of cutting, walking, stopping and spraying operation of the comprehensive tunneling machine are obtained in real time, an adjusting instruction is dynamically corrected by combining the concentration data, foam covering strength is improved when the comprehensive tunneling machine cuts, and foam output parameters are adjusted to a standby threshold when the comprehensive tunneling machine stops.
4. The comprehensive digging surface submerged foam adjusting system based on real-time dust concentration monitoring according to claim 1 is characterized in that the multi-parameter cooperative adjusting module comprises a wind pressure adjusting unit, a liquid supply adjusting unit, a foaming agent proportion adjusting unit and an injection gesture adjusting unit, wherein the wind pressure adjusting unit is connected with a gas source pipeline of the submerged foam generating injection module and used for adjusting output pressure and flow of a foaming gas source, the liquid supply adjusting unit is connected with a liquid supply pipeline of the submerged foam generating injection module and used for adjusting output flow of foaming base liquid, the foaming agent proportion adjusting unit is connected in series with the front end of the liquid supply pipeline and used for adjusting mixing proportion of foaming agent and clear water, and the injection gesture adjusting unit is connected with an injection assembly of the submerged foam generating injection module and used for adjusting injection angle, swing amplitude and injection range of the injection assembly.
5. The comprehensive tunneling surface submerged foam adjusting system based on real-time dust concentration monitoring according to claim 1 is characterized in that the submerged foam generating and injecting module comprises a plurality of foam generating units, an annular injection frame and a plurality of groups of directional injection assemblies, wherein the annular injection frame is fixed at the rear end of a cutting part of the comprehensive tunneling machine and is distributed around the cutting arm, the input end of the multi-channel foam generating unit is respectively connected with an air source and a liquid supply pipeline of the multi-parameter cooperative adjusting module, the output end of the multi-channel foam generating unit is respectively communicated with the annular injection frame and each directional injection assembly, the groups of directional injection assemblies are respectively distributed at the positions of two sides, a top plate and a bottom plate of a comprehensive tunneling surface roadway and are matched with the annular injection frame to form a foam injection network covering the full section of the comprehensive tunneling surface tunneling end, and the generated submerged foam fills the full section space of the comprehensive tunneling surface tunneling end to form a closed barrier for blocking dust diffusion.
6. The fully-mechanized coal mining face submerged foam adjusting system based on real-time dust concentration monitoring according to claim 1, wherein the main control module is further internally provided with a closed loop feedback adjusting unit, the closed loop feedback adjusting unit receives concentration data of the global dust concentration monitoring module in real time, compares a concentration measured value after foam adjustment with a preset target concentration value, adjusts foam output parameters step by step when the measured value is higher than the target concentration value, and adjusts the foam output parameters step by step when the measured value is lower than a lower limit threshold of the target concentration value, so that a full-closed loop real-time adjusting link is formed.
7. The fully-mechanized coal mining face submerged foam adjusting system based on real-time dust concentration monitoring according to claim 4, wherein the foaming agent proportioning adjusting unit is internally provided with a concentration closed-loop control subunit, the concentration closed-loop control subunit detects the actual mixing concentration of the foaming agent in the liquid supply pipeline in real time, the output frequency of a foaming agent metering pump is automatically adjusted according to the target proportioning concentration issued by the main control module, the accurate closed-loop adjustment of the concentration of the foaming agent is realized, the metering pump output is synchronously adjusted when the liquid supply flow is changed, and the stability of the proportioning concentration is ensured.
8. The fully-mechanized coal mining face submerged foam adjustment system based on real-time dust concentration monitoring according to claim 1, further comprising a fault self-diagnosis redundant protection module, wherein the fault self-diagnosis redundant protection module is electrically connected with the main control module, the multi-parameter cooperative adjustment module and the submerged foam generation injection module respectively, monitors air source pressure, liquid supply pressure, pipeline flow, foaming agent liquid level and the running state of the injection assembly in real time, automatically switches to a standby pipeline when the blockage or abnormal liquid supply of the single-way injection assembly is detected, simultaneously adjusts down the output parameters of a fault loop, adjusts up the foam output parameters of an adjacent loop, and ensures the continuity of the full-section submerged dust fall barrier.
9. The fully-mechanized coal mining face submerged foam regulation system based on real-time dust concentration monitoring according to claim 2, wherein each laser dust detection substation of the full-range dust concentration monitoring module is provided with an intrinsic safety type explosion-proof structure, the sampling frequency is not lower than 10Hz, the acquired data of each substation are synchronized in millisecond level through a time synchronization protocol, the main control module builds a real-time distribution model of a fully-mechanized coal mining face dust concentration field based on the synchronized multi-measuring-point concentration data, positions a high-concentration dust production area based on the distribution model, and directionally adjusts foam output parameters of a corresponding area injection assembly.
10. The fully-mechanized coal mining face submerged foam adjusting system based on real-time dust concentration monitoring according to claim 4, wherein the jet attitude adjusting unit is internally provided with a swing control subunit, and the swing control subunit controls the swing frequency and the swing angle of the annular jet frame and the directional jet assembly according to an adjusting instruction issued by the main control module, and when the cutting part of the fully-mechanized coal mining machine moves transversely, the jet direction is synchronously adjusted along the moving track of the cutting part, so that the foam always covers the cutting dust source head, and meanwhile, the swing amplitude is adjusted in the dust diffusion area, the foam coverage area is enlarged, and the submerged dust reducing effect is enhanced.

Description

Comprehensive digging surface submerged foam regulating system based on real-time dust concentration monitoring Technical Field The invention relates to the technical field of comprehensive digging flour dust treatment in coal mines, in particular to a comprehensive digging face submerged foam adjusting system based on real-time dust concentration monitoring. Background In the comprehensive digging operation process of the underground coal mine, a large amount of dust is generated by cutting coal and rock, so that the physical health of underground operators is endangered, the potential safety hazard of dust explosion exists, and the underground coal mine is an important management and control object for underground coal mine safety production and occupational health protection. The conventional dust falling means of the fully-mechanized excavating face mainly comprise spray dust falling and conventional foam dust falling, and the problems that the conventional dust falling means cannot adapt to the field operation requirements exist in practical application. The existing foam dust settling system mostly adopts a foaming and spraying mode with fixed parameters, and cannot adjust operation parameters according to dynamic changes of on-site dust concentration, or causes waste of foaming agent and hydroelectric resources under a low-concentration dust-producing working condition, or has insufficient dust settling capacity under a high-concentration dust-producing working condition, and cannot adapt to real-time fluctuation of dust production in the tunneling process of a fully-mechanized coal face. Most of the existing dust monitoring means are single-point fixed type monitoring, concentration data of single point positions can be obtained only, dust distribution conditions of full sections of fully-mechanized coal mining faces cannot be completely reflected, and the full-flow change from generation to diffusion of dust is difficult to accurately capture, so that the adjustment action lacks comprehensive data support, and the problems of adjustment lag and pertinence are solved. Meanwhile, the existing foam adjustment is mostly independent adjustment of single parameters, only the liquid supply flow or the foaming wind pressure can be independently adjusted, the dust settling effect, the stability and the coverage of the foam are jointly determined by a plurality of parameters such as wind pressure, liquid supply flow, foaming agent proportion and spraying posture, the single parameter adjustment cannot adapt the foam performance to the actual requirements of the scene, and the problems that the foam foaming effect is poor, the coverage is incomplete, the stability time is short and the like are easy to occur. The existing foam injection structure is mainly arranged at fixed points and in fixed directions, cannot dynamically adjust the injection range along with the working condition of the fully-mechanized coal mining machine, easily solves the problem that the dust source head cannot cover in place when the cutting head of the fully-mechanized coal mining machine moves for operation, is difficult to form a continuous blocking barrier of a full section, and is easy to diffuse outwards from a covering blind area, and the dust settling effect is not stable enough. In addition, most of the existing dust settling systems are in an open-loop control mode, a complete closed-loop feedback regulation link is not formed, regulation parameters cannot be dynamically corrected according to actual concentration changes after dust settling, and when the on-site working conditions and roadway environmental conditions change, the suitability of the system is poor, and stable dust settling effects cannot be maintained for a long time. Meanwhile, the existing system lacks a perfect fault self-diagnosis and redundancy protection mechanism, the dust fall capacity of the whole system is greatly reduced when a single part breaks down, and the system is difficult to adapt to the complex and severe underground operation environment. Therefore, a comprehensive digging surface submerged foam adjusting system based on real-time dust concentration monitoring is provided. Disclosure of Invention The invention aims to solve the problems in the background art, and provides a comprehensive digging surface submerged foam adjusting system based on real-time dust concentration monitoring. The specific technical scheme is as follows: The utility model provides a combine face submerged foam governing system based on real-time dust concentration monitoring, includes that whole domain dust concentration monitoring module, submerged foam take place injection module, multiparameter are regulation module and main control module in coordination, wherein: the full-area dust concentration monitoring module is arranged at full-section measuring points of the fully-mechanized coal mining face and is used for collecting full-dust concentration and respirat