CN-121976855-A - Intelligent inspection method and system for underground coal mine gas safety

Abstract

The invention relates to the technical field of gas detection, in particular to a coal mine underground gas safety intelligent inspection method and system, comprising the following steps: collecting the position coordinates of an inlet return airway connecting port of a mining working face at the intersection roadway of a mine roadway, identifying a ventilation flow direction change section according to the airflow direction angles of adjacent nodes, intersecting the adjacent area of a gas extraction pipeline and the return airway in a roof area, and checking the reading time of a methane sensor and the arrival time of inspection equipment according to the numbers of detection points to identify and detect the execution state. According to the invention, the ventilation flow direction change section is identified and the position of the inspection detection point is determined by constructing the association relation between the roadway ventilation nodes and the airflow direction, meanwhile, the inspection arrival behavior and the reading time of the sensor are sequentially checked to form the detection execution state tracking logic, the non-occurrence detection record position is additionally checked, the corresponding relation between the inspection behavior and the detection data is established, and the inspection capability and the inspection result discrimination reliability of the gas inspection process are improved.

Inventors

• Pan Lunzhang
• HU WENYI
• ZHANG BO

Assignees

• 四川蜀能矿山开发技术咨询有限公司

Dates

Publication Date

20260505

Application Date

20260408

Claims (10)

1. 1. The underground coal mine gas safety intelligent inspection method is characterized by comprising the following steps of: S1, acquiring position coordinates of a crossing roadway, an excavating working face inlet and a return air roadway connector in a mine roadway plan, acquiring and checking an air flow direction angle and a roadway axis direction, and connecting the air flow direction to obtain a roadway ventilation direction node sequence; S2, extracting air flow direction angles of adjacent nodes based on the roadway ventilation direction node sequence, checking air flow steering changes, and positioning positions corresponding to roadway sections to obtain a ventilation flow direction change section sequence; S3, reading a tunnel roof area, a gas extraction pipeline adjacent area and a return airway intersection area based on the ventilation flow direction change section sequence, and checking a gas inspection detection position and corresponding node numbers to obtain a gas inspection detection point sequence; S4, based on the gas inspection detection point sequence, calling the time of the detection point number corresponding to the reading time of the methane sensor, accessing inspection equipment to the detection point time, identifying the gas inspection execution condition, associating the detection point number to identify the inspection execution state, and obtaining a gas inspection detection execution state sequence; s5, checking the detection execution state along the detection point number based on the gas inspection detection execution state sequence, and analyzing the inspection arrival condition and the reading condition to obtain a gas inspection detection completion state sequence.
2. 2. The underground coal mine gas safety intelligent inspection method according to claim 1, wherein the roadway ventilation direction node sequence comprises a node number, a node space coordinate, a roadway axis direction, a gas flow direction angle, a gas flow speed and a gas flow direction relation, the ventilation flow direction change section sequence comprises a section starting node, a section ending node, a gas flow steering type, a steering change frequency, a roadway section length and a section space range, the gas inspection detection point sequence comprises a detection point number, a detection point coordinate position, a roadway section to which the gas inspection point coordinate position belongs, a region type, an inspection position distribution and a detection point spacing, the gas inspection execution state sequence comprises a detection point number, a sensor reading time, an inspection arrival time, a reading precedence relation, an inspection residence condition and an inspection execution condition, and the gas inspection completion state sequence comprises a detection point number, an inspection completion condition, an incomplete condition, an inspection arrival condition, a field reading condition and an inspection state classification.
3. 3. The underground coal mine gas safety intelligent inspection method according to claim 1, wherein the joint gas flow direction refers to continuous connection of gas flow direction angles measured at nodes according to the serial number sequence of roadway nodes, so that a complete ventilation gas flow direction relation is formed; The airflow steering change refers to ventilation flow direction change generated by deflection of airflow direction angles between adjacent roadway nodes.
4. 4. The method for intelligent inspection of underground coal mine gas safety according to claim 1, wherein the corresponding roadway section position refers to a roadway section range positioned in a mine roadway space according to a gas flow steering and direction changing node; The gas extraction pipeline adjacent area refers to a patrol important area in which gas leakage and accumulation occur within a preset distance threshold range from the gas extraction pipeline in a mine tunnel.
5. 5. The underground coal mine gas safety intelligent inspection method according to claim 1, wherein the specific steps of S1 are as follows: S101, acquiring position coordinates of a mine tunnel plan intersection, position coordinates of an excavation working face inlet and position coordinates of an air return tunnel connecting port, endowing node numbers and associating corresponding ventilation instrument numbers, and calling the ventilation instrument to acquire an air flow direction angle and an air flow speed value to obtain a tunnel node coordinate number set; s102, extracting adjacent node coordinates based on the roadway node coordinate number set, analyzing coordinate vector direction angles, comparing air flow direction angles with roadway axis direction angles, reading comparison results, checking directions by referring to preset direction deviation reference values, and calibrating node air flow direction angles to obtain a node air flow direction vector set; And S103, extracting a node number sequence and a corresponding air flow direction angle based on the node air flow direction vector set, executing direction pointing engagement on the air flow direction angles of adjacent nodes, providing an air flow direction pointing relation sequence according to the node number continuous relation, and connecting the node air flow direction pointing relation sequence in series to obtain a roadway ventilation direction node sequence.
6. 6. The underground coal mine gas safety intelligent inspection method according to claim 1, wherein the specific steps of S2 are as follows: S201, based on the roadway ventilation direction node sequence, extracting adjacent node airflow direction angles along a node numbering sequence, reading front node airflow direction angles and rear node airflow direction angles, comparing the angles, referring to a preset steering identification reference angle, extracting the node numbers corresponding to the occurrence direction deflection nodes and associating roadway position coordinates, and obtaining an airflow steering node set; S202, based on the airflow steering node set, extracting a node numbering sequence and calling corresponding roadway position coordinates, analyzing continuity between adjacent nodes of continuous node numbers, reading a node number difference value and judging a preset continuous number reference value, and tracking a continuous node section to obtain a steering section positioning information set; S203, based on the steering section positioning information set, extracting a section start node number and a section extension node number, calling a corresponding node airflow direction angle, tracking section direction change along a node number sequence, identifying a node airflow direction angle continuous section, associating roadway position coordinates, mapping a section node set sequence, and obtaining a ventilation flow direction change section sequence.
7. 7. The underground coal mine gas safety intelligent inspection method according to claim 1, wherein the specific steps of S3 are as follows: S301, extracting a zone starting node number and an extension node number based on the ventilation flow direction change zone sequence, calling node coordinate information to search corresponding tunnel roof region position coordinates, gas extraction pipeline adjacent region position coordinates and return air tunnel intersection region position coordinates, and performing correlation check on the region position coordinate node numbers to obtain a region node distribution set; S302, based on the regional node distribution set, node coordinates and node numbers are extracted, the node coordinate positions are verified along the roadway direction, the top plate regional height value, the extraction pipeline adjacent distance value and the return air roadway intersection angle value are read, and node adaptation judgment is performed by referring to a preset inspection position reference, so that an inspection position node list is obtained; S303, calling a node number and a corresponding roadway position coordinate, corresponding to the node number of the node inspection position, associating the node number with the inspection position sequence and connecting the nodes along the node number sequence based on the inspection position node list to obtain a gas inspection detection point sequence.
8. 8. The underground coal mine gas safety intelligent inspection method according to claim 1, wherein the specific steps of S4 are as follows: S401, extracting a detection point number and calling a methane sensor time log based on the gas inspection detection point sequence, searching the reading time of the methane sensor corresponding to the detection point number, checking the detection point number and the reading time, and sequentially matching the reading time items associated with the same detection point number to obtain a detection point reading time sequence; S402, based on the detection point reading time sequence, extracting a detection point number and a reading time, collecting the detection point arrival time of the inspection equipment, correspondingly checking the detection point number, comparing the reading time with the arrival time sequence, comparing the reading time position with the arrival time position sequence, and marking the sequence to obtain a detection point action sequence; S403, based on the detection point action sequence, extracting the detection point number and the corresponding action sequence information, collecting the stay time of the inspection personnel, checking the stay time corresponding to the detection point number, and judging the stay time and the action sequence information state to obtain a gas inspection execution state sequence.
9. 9. The underground coal mine gas safety intelligent inspection method according to claim 1, wherein the specific steps of S5 are as follows: S501, extracting a detection point number and a detection execution state based on the gas inspection detection execution state sequence, checking detection execution state identifiers item by item along the sequence of the detection point numbers, extracting the detection point numbers of the detection execution records and executing corresponding identifier processing with the detection execution state to obtain a detection execution state identifier set; S502, extracting numbers of detection points of detection execution records which do not appear based on the detection execution state identification set, collecting time of arrival of inspection equipment at the detection points and on-site methane reading time, recording default missing time marks of a system corresponding to the numbers of the detection points of the detection execution records which do not appear, and analyzing a sequence relation between inspection arrival actions and reading actions to obtain an inspection supplementary inspection record set; S503, extracting a detection point number, a patrol arrival condition and a reading condition based on the patrol supplementary check record set, classifying the detection point numbers with the patrol arrival record and the reading record into a finished class, classifying the detection point numbers with the patrol arrival record and the reading record into an unfinished class, and obtaining a gas patrol detection finished state sequence.
10. 10. An intelligent inspection system for underground coal mine gas safety, which is used for realizing the intelligent inspection method for underground coal mine gas safety according to any one of claims 1-9, and comprises the following steps: The ventilation node identification module acquires position coordinates of a mine tunnel intersection, a mining working face inlet and a return air tunnel connecting port, detects airflow direction angles and airflow speeds of ventilation meters at the nodes, compares the airflow direction angles with tunnel axis direction angles, and connects airflow direction directions according to node numbers to obtain a tunnel ventilation direction node sequence; The flow direction section identification module extracts the air flow direction angles of adjacent nodes based on the roadway ventilation direction node sequence, compares the air flow directions of front nodes and rear nodes, identifies the number range of the direction change nodes, and locates the position of the corresponding mine roadway section to obtain a ventilation flow direction change section sequence; the inspection point position determining module reads the position of the roadway section based on the ventilation flow direction change section sequence, detects the position coordinates of a roadway top plate installation area, a gas extraction pipeline adjacent area and a return air roadway intersection area, and obtains a gas inspection point sequence; the inspection execution recognition module detects the reading time of the serial number of the detection point corresponding to the methane sensor based on the gas inspection detection point sequence, monitors the time of the inspection equipment reaching the detection point in the mine roadway inspection path, and compares the reading time with the reaching time to obtain a gas inspection execution state sequence; And the inspection completion judging module reads the detection point number and the detection execution state based on the gas inspection detection execution state sequence, compares the detection execution state with the detection execution state, and analyzes the detection point number of the detection execution state which does not appear to obtain the gas inspection detection completion state sequence.

Description

Intelligent inspection method and system for underground coal mine gas safety Technical Field The invention relates to the technical field of gas detection, in particular to an intelligent inspection method and system for underground coal mine gas safety. Background The technical field of gas detection mainly relates to related technical matters for measuring and checking the concentration of combustible gas such as methane in underground air of a coal mine, and the core content of the technical matters comprises a gas concentration sampling mode, a detection point arrangement mode, a gas concentration measuring device use mode, a detection data recording and inspection flow and the like, and the detection positions are set in mine roadways, mining working faces, return air roadways and equipment areas to detect and record the concentration of the gas in the air at regular time, and meanwhile, different areas in the underground are checked sequentially according to a set inspection route to form an inspection method for periodically detecting and recording the condition of the gas in the mine. The traditional underground coal mine gas safety intelligent inspection method is an inspection mode for inspecting gas concentration in underground coal mine tunnels and mining areas by means of pointers, the technical matters aimed at are that the gas concentration at different underground detection positions is inspected and recorded, inspection staff sequentially reach all detection points along a preset tunnel inspection route, a handheld gas detector is used for measuring the methane concentration in the air at the detection positions, the detection time detection positions and detection values are filled in the detection positions, meanwhile, a fixed gas detection device arranged on the wall surface of the tunnel is inspected on site, the gas concentration values in a display device are read and recorded, the state power connection condition and the signal transmission line condition of the shell of the detection device are inspected, and then the underground gas inspection process is finished by continuing to the next detection position according to the preset inspection sequence. The existing underground coal mine gas inspection relies on a point-by-point detection and manual recording mode of a given route, inspection positions are arranged according to experiences, the change of a mine roadway ventilation structure is difficult to reflect, the problem that the relation between the distribution of detection points and the air flow is disjoint due to insufficient identification of an air flow steering area and a gas easy-gathering area, the arrival time of inspection personnel and the reading time of a sensor lack a unified checking mechanism, the corresponding relation between the on-site detection behavior and recorded information is fuzzy, the change of an inspection path and the detection execution condition lack continuous tracking basis, and the detection completion state is difficult to form a systematic discrimination result and influences the safety inspection management reliability and the inspection process traceability of the mine gas. Disclosure of Invention In order to solve the technical problems in the prior art, the embodiment of the invention provides a coal mine underground gas safety intelligent inspection method; in order to achieve the purpose, the invention adopts the following technical scheme that the underground coal mine gas safety intelligent inspection method comprises the following steps: S1, acquiring position coordinates of a crossing roadway, an excavating working face inlet and a return air roadway connector in a mine roadway plan, acquiring and checking an air flow direction angle and a roadway axis direction, and connecting the air flow direction to obtain a roadway ventilation direction node sequence; S2, extracting air flow direction angles of adjacent nodes based on the roadway ventilation direction node sequence, checking air flow steering changes, and positioning positions corresponding to roadway sections to obtain a ventilation flow direction change section sequence; S3, reading a tunnel roof area, a gas extraction pipeline adjacent area and a return airway intersection area based on the ventilation flow direction change section sequence, and checking a gas inspection detection position and corresponding node numbers to obtain a gas inspection detection point sequence; S4, based on the gas inspection detection point sequence, calling the time of the detection point number corresponding to the reading time of the methane sensor, accessing inspection equipment to the detection point time, identifying the gas inspection execution condition, associating the detection point number to identify the inspection execution state, and obtaining a gas inspection detection execution state sequence; s5, checking the detection execution state along the detection point number based o