CN111507640B - Zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas - Google Patents
Zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas Download PDFInfo
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Abstract
The invention relates to a zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas, and belongs to the technical field of coal mine safety. The method comprises the steps of firstly, carrying out macro prevention and control and regional prevention and control on the structure and gas in a coal body before mining, and effectively analyzing the structure field distribution of the coal body in front and the standard reaching effect of regional gas extraction so as to control a gas overrun dangerous source; then, system prevention and control and dynamic prevention and control are carried out aiming at the gas in the mining space, and the ventilation wind flow field distribution, the ventilation reliability and the gas emission change dynamic of a working face are effectively analyzed, so that the gas overrun danger is avoided; then, performing pressure control on the gas in the mined out space, and effectively analyzing the pressure storm in the mined out space to prevent the gas in the mined out space from flowing into a mining space; then, gas over-limit treatment equipment is prevented and controlled, and normal operation of the equipment is guaranteed; and finally, according to the time-space evolution process of the working face mining, multidimensional prevention and control are combined and advanced continuously, and the gas over-limit influence factors in the working face mining period are controlled comprehensively, so that zero gas over-limit is realized.
Description
Technical Field
The invention belongs to the technical field of coal mine safety, and relates to a zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas.
Background
The method has the advantages of strengthening gas control, realizing zero gas overrun, and being the most main way for restraining coal mine gas disaster accidents from the source and guaranteeing coal mine safety production. The regulations and the regulation requirements such as coal mine safety regulation, enhanced coal mine gas control ten regulations and the like need to establish a gas zero-overrun target management system, improve the technology and equipment level of gas overrun control, and establish the safety concept and the target that the gas overrun is an accident.
Most coal seams have large gas content, complex geological structures, various and complex inducing factors of gas over-limit, and are related to various factors in the aspects of technologies, management and equipment, such as occurrence and control conditions of geological structures, standard reaching effect of regional gas extraction, wind network operation reliability of ventilation systems, abnormal gas emission timely monitoring and processing conditions, gas extraction and roof pressure of goafs, operation conditions of related ventilation and extraction equipment and the like, so that the gas over-limit prevention and control technology has high requirements, multiple related works and high management difficulty, and the problem of gas zero over-limit cannot be effectively solved by a single prevention and control technology and means only by mutual cooperation and cooperation of various technologies and management works in coal mine geology, ventilation, extraction, production, monitoring and the like. However, many coal mine technologies and management forces in China are weak, and in the face of various prevention and control requirements and complicated work of gas zero-overrun, key points are easy to be held, analysis is incomplete, a system is not formed, and the coal mine gas zero-overrun is difficult to effectively realize.
Therefore, a coal mine gas zero-overrun multi-dimensional dynamic prevention and control method is needed, which surrounds main technical work and flow of gas disaster prevention and control according to the mining spatio-temporal evolution relation of a working face, and performs gas zero-overrun multi-dimensional dynamic prevention and control to enhance the mine gas zero-overrun prevention and control capability and realize gas overrun joint prevention and control and controllable prevention and control
Disclosure of Invention
In view of the above, the invention aims to provide a zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas, which is implemented by taking the time of 'before mining, during mining and after mining' of a coal mine working face and the spatial association and evolution relation of 'in the front coal body, the mining space and the rear goaf' into consideration, starting from a multi-aspect and full-dimensional effective prevention and control angle, firstly performing macroscopic prevention and control and regional prevention and control on the structure and gas in the coal body before mining, and effectively analyzing the structure field distribution of the front coal body and the standard reaching effect of regional gas extraction so as to control a gas overrun hazard source; then, system prevention and control and dynamic prevention and control are carried out on the gas in the mining space, the ventilation wind flow field distribution, the ventilation reliability and the gas emission change dynamics of the working face are effectively analyzed, and the gas overrun danger is effectively avoided as far as possible; then, performing pressure control on the gas in the mined out space, and effectively analyzing the pressure storm in the mined out space to prevent the gas in the mined out space from flowing into a mining space; then, aiming at the operation conditions of the gas treatment equipment before, during and after mining, equipment prevention and control are carried out, and the normal and stable operation of the gas treatment equipment is ensured; and finally, according to the spatio-temporal evolution process of 'before mining-in-mining-after mining' of the working face, multi-dimensional prevention and control are organically combined and continuously promoted, and the gas over-limit influence factors in the mining period of the working face are comprehensively and dynamically controlled, so that a method and support are provided for gas zero over-limit prevention and control in a coal mine field, and the purposes of gas over-limit prevention, controllability and gas zero over-limit are achieved.
In order to achieve the purpose, the invention provides the following technical scheme:
a coal mine gas zero-overrun multi-dimensional dynamic prevention and control method considers the time of coal mine working face before mining, during mining and after mining and the association and evolution relation of the space of the coal in front, mining space and rear goaf, and comprises the following steps:
s1: aiming at the internal structure and gas prevention and control of the coal body before mining, performing macro prevention and control aiming at a macro geological structure and regional prevention and control aiming at regional gas extraction standard, and controlling and analyzing the structural field distribution of the coal body in front of a working face and the regional gas extraction standard-reaching conditions:
s2: aiming at the gas in the mining space, continuous system prevention and control and dynamic prevention and control are carried out, and the ventilation wind flow field distribution, the abnormal condition of a ventilation network and the dynamic characteristic of gas emission of a working face are controlled and analyzed;
s3: performing pressure control aiming at gas in the mined-out goaf, and controlling and analyzing the pressure storm in the mined-out goaf;
s4: aiming at the gas treatment equipment before, during and after mining, equipment prevention and control are carried out, and the running states of the gas over-limit prevention and control equipment of the coal gas extraction equipment before mining, the ventilation facility and equipment and the goaf low-negative-pressure extraction equipment are controlled and analyzed;
s5: according to the time, space evolution sequence and process of working face mining, the multidimensional prevention and control before mining, during mining and after mining are organically combined and continuously promoted, zero-overrun multidimensional three-dimensional dynamic prevention and control of gas in the working face mining period is carried out, and the working face gas overrun influence factors are comprehensively controlled and analyzed.
Optionally, the S1 specifically includes:
aiming at fundamental prevention and control work in the aspects of geological structure detection and gas extraction before mining, a comprehensive detection method in a geophysical prospecting, drilling, three-dimensional earthquake or mining disclosure mode is utilized from a macroscopic prevention and control angle to master the structural field distribution in a coal body in front of a working face, and the safety distance from the working face to a geological structure abnormal area is controlled in advance; comprehensively analyzing the extraction monitoring and extraction detection information from the aspect of regional prevention and control, and performing unit-by-unit control and analysis on the distribution of a gas extraction field and the standard reaching effect of the gas extraction by jointly calculating the extraction time difference coefficient, the total coal seam gas storage capacity, the accumulated gas extraction capacity and the residual coal seam gas content of an evaluation region, so that the standard reaching evaluation result of the gas extraction reaches the temporary standard reaching rule of the coal mine gas extraction or the actually specified evaluation standard of a coal mine; the method is used for guaranteeing the accurate control of the geological structure and the standard gas extraction effect on the basis of the source and the region, and controlling and eliminating the coal body gas overrun dangerous source in advance.
Optionally, the S2 specifically includes:
aiming at key prevention and control work in the aspects of mine ventilation and gas emission analysis in mining, the ventilation monitoring and information of a mining space are comprehensively analyzed from the perspective of system prevention and control, and the abnormal conditions in the aspects of short circuit of wind flow, circulating wind, insufficient wind quantity or wind speed and overlarge wind speed existing in ventilation wind flow field distribution and a ventilation network are continuously controlled and analyzed; from the aspect of dynamic prevention and control, deeply analyzing gas monitoring information, and continuously calculating and analyzing gas emission abnormal conditions in all aspects according to calculation indexes and abnormal analysis models which represent the aspects of the desorbable gas quantity, gas desorption, gas fluctuation and gas development trend of a coal body of a working surface; the ventilation is reliable, abnormal gas emission conditions are found in advance, and the occurrence or development of gas overrun risks is avoided.
Optionally, the S3 specifically includes:
aiming at the key prevention and control work in the aspect of roof pressure monitoring after mining, the monitoring and detection information of the mine pressure of the working face is comprehensively analyzed from the pressure prevention and control angle, the mine pressure display characteristics of the working face and the periodic pressure dynamic state of the roof of the goaf are controlled and analyzed, the abnormal time of the mine pressure is predicted in advance, and the over-limit risk caused by the fact that a large amount of gas in the goaf instantly flows into the working face is prevented.
Optionally, the S4 specifically includes:
aiming at the operation guarantee of the gas over-limit equipment before, during and after mining, the operation states of the arrangement position, the start-stop state, the operation time and the load degree of the gas extraction pipeline and the extraction equipment, the ventilation facility and equipment on the working face and the low-negative-pressure extraction equipment in the goaf are controlled and analyzed according to the operation monitoring information of the equipment, and the unsafe conditions of unreasonable arrangement position, operation without starting, overlong operation time and overlarge operation load of the equipment are reminded and warned according to the operation and installation requirements of the equipment so as to ensure the normal and safe operation of the equipment and ensure that the gas before, during and after mining is extracted and discharged.
Optionally, the S5 specifically includes:
the combination, pushing prevention and control of the pre-mining, the middle mining and the post-mining are specifically as follows:
according to the time and space evolution sequence and process of the working face including pre-mining, in-mining and post-mining, the method organically combines and continuously advances macro prevention and control, area prevention and control, system prevention and control, dynamic prevention and control, pressure prevention and control and equipment prevention and control, and carries out multi-factor, whole-process and dynamic joint prevention and control on the aspects of the geological structure influence of gas overrun, the working face gas extraction standard reaching effect, the ventilation network reliability, the gas emission change characteristic, the goaf roof pressure storm, the ventilation facility equipment, the working face gas extraction equipment and the operation condition of the goaf low-negative pressure extraction equipment, so that zero overrun multi-dimensional dynamic gas prevention and control is realized.
The invention has the beneficial effects that:
the invention is based on the fact that the number of gas mines is large, the distribution is wide, the gas disaster is serious, the influence factors are complex, a single technique can not be effectively prevented and controlled, the problems of multiple technologies and works, high technical requirements, large management difficulty and the like related to the gas disaster prevention and control are solved, the main technical work and process of the gas disaster prevention and control are tightly surrounded, the system considers the combination and change relation of the mining space and time of the working face, the zero-overrun multi-dimensional dynamic prevention and control of the gas aiming at the coal body structure and the gas before mining, the gas of the mining space during mining and the gas of the goaf after mining can be utilized, the geological structure influence, the standard reaching effect of the gas extraction of the working face, the reliability of a ventilation network, the gas emission change characteristics, the coming pressure storm of the goaf roof board, the operation conditions of ventilation facilities, the gas extraction equipment of the working face, the low-negative-pressure extraction equipment and the like can be controlled and analyzed by multiple factors, therefore, the over-limit dangerous source is controlled and eliminated from the source, the process and the guarantee, the over-limit danger of gas is timely discovered and avoided, the gas in the goaf is prevented from instantly flowing into a working surface and the stable operation of related treatment equipment in a large quantity, the gas over-limit is effectively controlled, a method and a support are provided for the zero-over-limit prevention and control of the gas in a coal mine site, and the aim of preventing, controlling and fundamentally restraining the gas over-limit is fulfilled.
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 objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas provided by the invention;
FIG. 2 is a diagram showing the elements of the zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas provided by the invention;
fig. 3 is a time-space sequence diagram of a zero-overrun multi-dimensional prevention and control method for coal mine gas provided by the invention.
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the invention, shown in the drawings are schematic representations and not in the form of actual drawings; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood 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 numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Fig. 1 is a flow chart of a zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas provided by the invention, in the zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas in the embodiment, the system considers the time of coal mine working face before mining, during mining and after mining and the spatial association and evolution relation of front coal body, mining space and rear goaf, and proceeds from the multi-aspect and full-three-dimensional effective prevention and control angle according to the following steps:
s1: aiming at the structure and gas in the coal body before mining, macro prevention and control and regional prevention and control are carried out, and the structure field distribution of the coal body in front of the working face and the regional gas extraction standard reaching effect are effectively controlled and analyzed:
s2: aiming at the gas in the mining space, continuous system prevention and control and dynamic prevention and control are carried out, and the ventilation wind flow field distribution, the abnormal condition of a ventilation network and the dynamic gas emission characteristic of a working face are effectively controlled and analyzed;
s3: the pressure coming prevention and control are carried out aiming at the gas in the mined-out goaf, and the pressure coming storm in the mined-out goaf is effectively controlled and analyzed;
s4: aiming at gas treatment equipment before, during and after mining, equipment prevention and control are carried out, and the running states of gas over-limit prevention and control equipment such as coal gas extraction equipment before mining, ventilation facilities and equipment, goaf low-negative pressure extraction equipment and the like are effectively controlled and analyzed;
s5: according to the time, space evolution sequence and process of working face mining, the multidimensional prevention and control before mining, during mining and after mining are organically combined and continuously promoted, zero-overrun multidimensional three-dimensional dynamic prevention and control of gas in the working face mining period is carried out, and the working face gas overrun influence factors are comprehensively controlled and analyzed.
Fig. 2 and fig. 3 are a component diagram and a time-space sequence diagram of a zero-overrun multi-dimensional dynamic prevention and control method for coal mine gas provided by the invention. Before the mining of the working face, in view of the high gas overrun danger of the geological structure and the fact that the regional gas pre-pumping is a fundamental source governing measure, the gas overrun prevention and control are carried out from the two aspects of macroscopic prevention and control and regional prevention and control aiming at the front internal structure of the coal body and the gas. For macroscopic prevention and control, firstly, the detection information such as geophysical prospecting, drilling, three-dimensional earthquake, mining disclosure and the like is integrated, and then information interpretation is carried out, so that the structural field distribution in the coal body in front of a working face is accurately mastered, the space distances between the current position of the working face and different geological structures are accurately calculated, and the safety distance between the working face and an abnormal region of the geological structures is controlled in advance; for regional prevention and control, according to information such as coal seam gas occurrence, extraction monitoring, extraction detection and extraction time, the unit-by-unit detailed calculation and analysis of the gas storage quantity, extraction uniformity, accumulated extraction quantity and residual gas quantity of the extraction unit of the working face are carried out, the extraction standard reaching evaluation standard is compared, and the gas extraction field distribution and the gas extraction standard reaching effect are accurately controlled and analyzed. By adopting pre-mining prevention and control, the effects of controlling and eliminating the coal gas overrun dangerous source are achieved.
In the process of working face development, in view of the fact that mine ventilation and gas emission dynamic analysis are daily key prevention and control work, gas overrun prevention and control are conducted from the two aspects of system prevention and control and dynamic prevention and control. For system prevention and control, parameters such as wind speed and component of a whole mine ventilation network are automatically solved according to ventilation monitoring, ventilation detection and tunnel friction resistance parameters of a mining space, mine ventilation wind flow field distribution is accurately mastered, and related standards and requirements are compared on the basis, so that ventilation network abnormalities such as wind flow short circuit, circulating wind, insufficient wind quantity or wind speed, overlarge wind speed and the like are controlled and analyzed, and reliable mine ventilation is guaranteed; for dynamic prevention and control, firstly, deeply analyzing gas monitoring information, automatically calculating gas emission characteristic index values representing aspects of the desorbable gas quantity, gas desorption, gas fluctuation and the like of a working face, contrasting an abnormity identification mark, and automatically analyzing and identifying the convenient gas emission abnormal change conditions of overlarge desorbable gas quantity, too fast gas desorption, unstable gas fluctuation, abnormal gas trend and the like. Through adopting well prevention and control, reach from the in-process and avoid gas transfinite risk to take place or develop, from in time discovering and handling the gas transfinite abnormal conditions fast.
After mining, the gas overrun prevention and control is carried out by the system prevention and control angle because the periodic pressure coming prevention and control of the working face top plate is the key prevention and control work. The mine pressure monitoring and detecting information of the working face is comprehensively analyzed, the overall mine pressure display characteristics of the working face are analyzed, the periodic coming pressure pace and characteristics of the working face are mastered, and the coming pressure abnormal time is pre-judged in advance. Through the control of postmining prevention and control, the situation that the gas is over-limited instantly due to the fact that the goaf presses a storm and a large amount of gas rushes into a working face is prevented from happening in the later period of protection.
The prevention and control of the gas treatment equipment before, during and after mining mainly comprises a working face gas extraction pipeline and extraction equipment before mining, working face ventilation facilities and equipment during mining, goaf low-negative pressure gas extraction equipment after mining and the like, and the running states of the equipment such as arrangement position, start-stop state, running time, load degree and the like are continuously analyzed according to running and start-stop monitoring information of various equipment, so that the equipment is ensured to run reasonably, normally and safely, and the gas before, during and after mining is extracted and discharged.
On the basis of pre-mining, mid-mining, post-mining and equipment prevention and control, according to the time and space evolution sequence and process of the working face from pre-mining to mid-mining to post-mining, the geological structure influence of gas overrun, the working face gas extraction standard reaching effect, the reliability of a ventilation network, the gas emission change characteristic, the goaf roof pressure storm, ventilation facility equipment, the working face gas extraction equipment and the goaf low-negative pressure extraction equipment are organically combined and continuously promoted, the multi-factor, whole process and dynamic joint prevention and control in the aspects of the running condition of the working face gas extraction equipment, the working face gas extraction goaf equipment and the low-negative pressure extraction equipment are carried out, and the zero-overrun multi-dimensional dynamic prevention and control of the gas is realized.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (3)
1. A coal mine gas zero-overrun multi-dimensional dynamic prevention and control method is characterized by comprising the following steps: the method takes the time of 'before mining-in mining-after mining' of a coal mine working face and the spatial association and evolution relation of 'in front coal body-mining space-rear goaf' into consideration, and comprises the following steps:
s1: aiming at the internal structure and gas prevention and control of the coal body before mining, performing macro prevention and control aiming at a macro geological structure and regional prevention and control aiming at regional gas extraction standard, and controlling and analyzing the structural field distribution of the coal body in front of a working face and the regional gas extraction standard-reaching conditions:
s2: aiming at the gas in the mining space, continuous system prevention and control and dynamic prevention and control are carried out, and the ventilation wind flow field distribution, the abnormal condition of a ventilation network and the dynamic characteristic of gas emission of a working face are controlled and analyzed;
s3: performing pressure control aiming at gas in the mined-out goaf, and controlling and analyzing the pressure storm in the mined-out goaf;
s4: aiming at gas treatment equipment before, during and after mining, equipment prevention and control are carried out, and the running states of gas over-limit prevention and control equipment of coal gas extraction equipment before mining, ventilation facilities and equipment and low negative pressure extraction equipment in a goaf are controlled and analyzed;
s5: according to the time, spatial evolution sequence and process of working face mining, the multidimensional prevention and control before mining, during mining and after mining are organically combined and continuously promoted, zero-overrun multidimensional three-dimensional dynamic prevention and control of gas in the working face mining period is carried out, and the working face gas overrun influence factors are comprehensively controlled and analyzed;
the S1 specifically includes:
aiming at the fundamental prevention and control work in the aspects of geological structure detection and gas extraction before mining, a comprehensive detection method in the modes of geophysical prospecting, drilling, three-dimensional earthquake or mining is utilized from the perspective of macroscopic prevention and control, the structural field distribution in the coal body in front of a working face is mastered, and the safe distance from the working face to a geological structure abnormal area is controlled in advance; comprehensively analyzing the extraction monitoring and extraction detection information from the aspect of regional prevention and control, and performing unit-by-unit control and analysis on the distribution of a gas extraction field and the standard reaching effect of the gas extraction by jointly calculating the extraction time difference coefficient, the total coal seam gas storage capacity, the accumulated gas extraction capacity and the residual coal seam gas content of an evaluation region, so that the standard reaching evaluation result of the gas extraction reaches the temporary standard reaching rule of the coal mine gas extraction or the evaluation standard actually specified by the coal mine; the method has the advantages that accurate control of geological structures and standard gas extraction effect are guaranteed on the basis of sources and regions, and coal body gas overrun dangerous sources are controlled and eliminated in advance;
the S2 specifically includes:
aiming at key prevention and control work in the aspects of mine ventilation and gas emission analysis in mining, the ventilation monitoring and information of a mining space are comprehensively analyzed from the perspective of system prevention and control, and the abnormal conditions in the aspects of short circuit of wind flow, circulating wind, insufficient wind quantity or wind speed and overlarge wind speed existing in ventilation wind flow field distribution and a ventilation network are continuously controlled and analyzed; from the aspect of dynamic prevention and control, deeply analyzing gas monitoring information, and continuously calculating and analyzing gas emission abnormal conditions in all aspects according to calculation indexes and abnormal analysis models which represent the aspects of the desorbable gas quantity, gas desorption, gas fluctuation and gas development trend of a coal body of a working surface; the ventilation reliability is guaranteed in the aspects of system and precursor monitoring, abnormal gas emission conditions are found in advance, and the occurrence or development of gas overrun risks is avoided;
the S3 specifically includes:
aiming at the key prevention and control work in the aspect of roof pressure monitoring after mining, the mine pressure monitoring and detection information of the working face is comprehensively analyzed from the pressure prevention and control angle, the mine pressure display characteristic of the working face and the periodic coming pressure dynamic state of the roof of the goaf are controlled and analyzed, the coming pressure abnormal time is judged in advance, and the gas in the goaf is prevented from instantly flowing into the working face in a large amount to cause the transfinite risk.
2. The coal mine gas zero-overrun multi-dimensional dynamic prevention and control method as claimed in claim 1, characterized in that: the S4 specifically includes:
aiming at the operation guarantee of the gas over-limit equipment before, during and after mining, the operation states of the arrangement position, the start-stop state, the operation time and the load degree of the gas extraction pipeline and the extraction equipment, the ventilation facility and equipment on the working face and the low-negative-pressure extraction equipment in the goaf are controlled and analyzed according to the operation monitoring information of the equipment, and the unsafe conditions of unreasonable arrangement position, operation without starting, overlong operation time and overlarge operation load of the equipment are reminded and warned according to the operation and installation requirements of the equipment so as to ensure the normal and safe operation of the equipment and ensure that the gas before, during and after mining is extracted and discharged.
3. The coal mine gas zero-overrun multi-dimensional dynamic prevention and control method as claimed in claim 1, characterized in that: the S5 specifically includes:
the combination, pushing prevention and control of the pre-mining, the middle mining and the post-mining are specifically as follows:
according to the time and space evolution sequence and process of the working face including pre-mining, in-mining and post-mining, the method organically combines and continuously advances macro prevention and control, area prevention and control, system prevention and control, dynamic prevention and control, pressure prevention and control and equipment prevention and control, and carries out multi-factor, whole-process and dynamic joint prevention and control on the aspects of the geological structure influence of gas overrun, the working face gas extraction standard reaching effect, the ventilation network reliability, the gas emission change characteristic, the goaf roof pressure storm, the ventilation facility equipment, the working face gas extraction equipment and the operation condition of the goaf low-negative pressure extraction equipment, so that zero overrun multi-dimensional dynamic gas prevention and control is realized.
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