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CN-121998424-A - Coal rock mechanism correction system

CN121998424ACN 121998424 ACN121998424 ACN 121998424ACN-121998424-A

Abstract

The invention discloses a coal-rock mechanism correction system, and relates to the technical field of coal mine underground gas extraction drilling monitoring; the system comprises a data acquisition module, a coal and rock uniformity dynamic evaluation module, a depth-quantity double-reckoning module, a multi-threshold linkage risk early warning and cooperative control module and a display storage module. The system comprises a data acquisition module, a coal and rock uniformity dynamic evaluation module, a depth-quantity double-reckoning module, a multi-threshold linkage risk early warning and cooperative control module and a multi-dimensional data setting module, wherein the data acquisition module acquires and transmits pressure data, the coal and rock uniformity dynamic evaluation module constructs a two-dimensional evaluation standard through pressure gradient calculation and time entropy extraction, and outputs uniformity grading results, the depth-quantity double reckoning module introduces uniformity correction coefficients and reckons the quantity of drill pipes and the coal and rock depth by combining a drill pipe mechanical model, and the multi-threshold linkage risk early warning and cooperative control module integrates multi-dimensional data to set linkage thresholds to execute grading early warning and cross-system cooperative control. The system realizes closed-loop control from characteristic evaluation to risk prevention and control of the coal-rock structure, improves recognition accuracy, calculation accuracy and early warning timeliness, and adapts to underground operation requirements.

Inventors

  • ZHU KUNFEI
  • HU MINGHAO

Assignees

  • 安徽佐阳电子科技有限公司

Dates

Publication Date
20260508
Application Date
20260127

Claims (9)

  1. 1. The coal rock mechanism correction system is characterized by comprising a data acquisition module, a coal rock uniformity dynamic evaluation module, a depth-quantity double calculation module and a multi-threshold linkage risk early warning and cooperative control module, wherein the data acquisition module acquires drilling machine propulsion pressure data and rotation pressure data and transmits the data to the coal rock uniformity dynamic evaluation module, the coal rock uniformity dynamic evaluation module carries out pressure gradient calculation and time entropy extraction on the pressure data, a two-dimensional evaluation standard is built to output extremely uniform, nonuniform and extremely nonuniform four-level coal rock uniformity grading results and synchronizes to the depth-quantity double calculation module, the depth-quantity double calculation module takes the uniformity grading results as correction parameters, uniformity correction coefficients are introduced, the drill rod quantity and coal rock depth are calculated by combining the drill rod mechanical model and the time sequence characteristic extraction results, the multi-threshold linkage risk early warning and cooperative control module integrates the uniformity grading results, the drill rod quantity, the coal rock depth and the pressure data, and the multi-dimensional linkage threshold value is set based on the pressure gradient, the time entropy, the uniformity grading results, the drill rod quantity and the coal rock depth, and the cross-system cooperative control is executed.
  2. 2. The system for correcting the coal-rock mechanism according to claim 1, wherein the data acquisition module comprises a pressure sensing unit, a data preprocessing unit and a transmission unit, the pressure sensing unit is provided with two paths and is respectively arranged on a drilling machine pushing oil pipe and a rotating oil pipe to acquire a pushing pressure analog quantity signal and a rotating pressure analog quantity signal, the data preprocessing unit converts the analog quantity signal and eliminates interference data, and the transmission unit transmits the processed pressure data to the dynamic evaluation module for the uniformity of the coal-rock through an industrial Ethernet.
  3. 3. The system for correcting the coal rock mechanism according to claim 1, wherein the dynamic coal rock uniformity evaluation module comprises a pressure gradient calculation unit, a time entropy extraction unit and a uniformity classification unit, wherein the pressure gradient calculation unit respectively carries out first derivative operation on propulsion pressure data and rotation pressure data based on sampling time intervals to obtain the change rate of pressure along with time, the time entropy extraction unit adopts a sample entropy algorithm to process a pressure curve, the disorder of pressure fluctuation is quantified, the uniformity classification unit constructs a two-dimensional evaluation standard according to the pressure gradient and the time entropy, and a four-level uniformity classification result of extremely uniformity, non-uniformity and extremely non-uniformity is output.
  4. 4. The system for correcting the coal rock organization according to claim 1, wherein the depth-quantity double-calculation module comprises a mechanical model construction unit, a time sequence feature extraction unit and a calculation correction unit, wherein the mechanical model construction unit establishes a correlation model of different uniformity grading results, pressure and propulsion speed, the time sequence feature extraction unit identifies pressure time sequence fragments corresponding to each drill rod through a sliding window algorithm, the calculation correction unit calculates the total depth in combination with the length accumulation of the single drill rod, the uniformity correction coefficient is introduced to correct the calculation result, and the number of drill rods and layered bit coal rock depth data are synchronously output.
  5. 5. The system for correcting the coal-rock organization is characterized in that the multi-threshold linkage risk early warning and cooperative control module comprises a threshold setting unit, an early warning executing unit and a cooperative control unit, wherein the threshold setting unit sets a stuck risk threshold, a collapse risk threshold and a drill rod overload risk threshold based on pressure gradient, time entropy, uniformity grading results, the number of drill rods and coal-rock depth, the early warning executing unit executes primary, secondary and tertiary early warning according to triggered threshold levels, and the cooperative control unit is in linkage with a drilling machine control system, a downhole gas extraction system and a ground monitoring center through an industrial Ethernet and gives control instructions.
  6. 6. The coal rock mechanism correcting system according to claim 5, wherein the primary early warning of the early warning executing unit carries out on-site prompt through a host loudspeaker and an LED warning lamp, early warning information is synchronously pushed to a ground monitoring center, the secondary early warning sends a speed reducing instruction to a drilling machine control system, the tertiary early warning automatically triggers the drilling machine to stop, and the underground gas extraction system is linked to adjust extraction intensity and send warning information to the ground scheduling center.
  7. 7. The system for correcting a coal-rock organization according to claim 1, further comprising a display storage module, wherein the display storage module receives output data of the coal-rock uniformity dynamic evaluation module, the depth-quantity double calculation module and the multi-threshold linkage risk early warning and cooperative control module, the display storage module comprises a touch display unit and a data storage unit, the touch display unit displays a pressure curve, a uniformity grading result, the number of drill rods, the coal-rock depth and early warning information in real time, and the data storage unit stores collected original data, processed intermediate data and final result data and supports historical data retrieval and playback.
  8. 8. The system for correcting the coal-rock mechanism according to claim 1, wherein the system adopts a mining flameproof and intrinsically safe structural design, and comprises a flameproof box and an intrinsically safe box, wherein a high-frequency transformer and an intrinsically safe power circuit board are arranged in the flameproof box, the flameproof box An Xiangan is arranged on the upper part of the flameproof box, a main control board, a display screen, an LED warning lamp and a loudspeaker are arranged in the flameproof box, and a wiring horn mouth is arranged in the flameproof box and is used for connecting a power cable, a signal cable and a network cable.
  9. 9. The system for correcting the coal and rock organization according to claim 1, wherein the cooperative control unit of the multi-threshold linkage risk early warning and cooperative control module is connected with an underground looped network exchanger by adopting a TCP/IP communication protocol, and data interaction and instruction transmission with a drilling machine control system, an underground gas extraction system and a ground monitoring center are realized through the underground looped network exchanger, so that real-time synchronization of control instructions and early warning information multi-terminal is ensured.

Description

Coal rock mechanism correction system Technical Field The invention relates to the technical field of coal mine underground gas extraction drilling monitoring, in particular to a coal-rock mechanism correction system. Background The underground coal mine gas extraction drilling operation is a key link for guaranteeing the safe production of the coal mine, and the operation efficiency and the safety of the underground coal mine gas extraction drilling operation directly depend on the accurate grasp of the structural parameters of the coal and rock. In the prior art, although basic parameters such as the pushing pressure and the rotating pressure of a drilling machine can be acquired by the mining monitoring equipment, the coal seam and the rock stratum can be primarily distinguished only through the pressure amplitude, the uniformity difference of the coal and the rock in the same horizon can not be accurately identified, and local abnormal structures such as gangue clamping areas and loose areas are difficult to position. The rough recognition mode causes lack of targeted basis for optimization of the drilling process, is easy to cause problems of drill rod vibration, drilling deflection and the like due to abrupt change of coal and rock characteristics, and influences gas extraction effect. Meanwhile, the calculation of the number of drill rods and the depth of the coal rock in the prior art depends on manual measurement or simple pressure time sequence judgment, error correction is not carried out by combining internal uniformity characteristics of the coal rock, so that calculation result errors are large, reliable data support cannot be provided for mining progress management and control, risk early warning is triggered only by a single pressure threshold value, multidimensional data such as uniformity, depth and the like are not integrated, complex risks such as drilling sticking and hole collapse are difficult to accurately pre-judge, passive response is often carried out after accidents occur, and safety and stable operation of equipment of underground operators are seriously threatened. In view of this, the present application has been made. Disclosure of Invention The invention aims to provide a coal rock mechanism correction system for solving the problems in the background art. In order to solve the technical problems, the invention provides a coal-rock mechanism correction system, which comprises a data acquisition module, a coal-rock uniformity dynamic evaluation module, a depth-quantity double calculation module and a multi-threshold linkage risk early warning and cooperative control module, wherein the data acquisition module acquires drilling machine propulsion pressure data and rotation pressure data and transmits the data to the coal-rock uniformity dynamic evaluation module, the coal-rock uniformity dynamic evaluation module carries out pressure gradient calculation and time entropy extraction on the pressure data, a two-dimensional evaluation standard is constructed to output extremely uniform, nonuniform and extremely nonuniform four-level coal-rock uniformity classification result and synchronizes to a depth-quantity double calculation module, the depth-quantity double calculation module takes the uniformity classification result as a correction parameter, a uniformity correction coefficient is introduced, the drill rod mechanical model and the time sequence feature extraction result are combined to calculate the quantity and the coal-rock depth, the multi-threshold linkage risk early warning and cooperative control module integrates the uniformity classification result, the drill rod quantity, the coal-rock depth and the pressure data, and the multi-dimensional linkage threshold are set based on the pressure gradient, the time entropy and the uniformity classification result, the drill rod quantity and the coal-depth, and the coal-depth are controlled in a cooperative manner; through the cooperation of multiple modules, the closed-loop control from characteristic evaluation to parameter calculation to risk prevention and control of the coal-rock structure is realized, the limitation of the existing single pressure data monitoring is broken through, the coal-rock identification precision, the depth calculation accuracy and the risk early warning timeliness are obviously improved, and the requirements of gas extraction drilling operation under a coal mine are comprehensively adapted. The data acquisition module comprises a pressure sensing unit, a data preprocessing unit and a transmission unit, wherein the pressure sensing unit is provided with two paths and is respectively arranged on a drilling machine pushing oil pipe and a rotating oil pipe, pushing pressure analog quantity signals and rotating pressure analog quantity signals are acquired, the data preprocessing unit converts the analog quantity signals and eliminates interference data, the transmission unit transmits the processe