CN111379562A - Water-controlled coal mining method and device under composite water body - Google Patents
Water-controlled coal mining method and device under composite water body Download PDFInfo
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Abstract
The embodiment of the invention provides a water-control coal mining method and a device under a composite water body, wherein the method comprises the following steps: acquiring composite water occurrence characteristic information and coal seam mining overburden rock damage height prediction information, and obtaining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overburden rock damage height prediction information; and determining a water control mining scheme according to the water-rich subarea, the fracture safety subarea and the inrush water area. By detecting the water body and the rock mass, the water inflow amount and the water inflow form of a working face are technically controlled by combining top water mining with drainage or drainage mining, firstly draining and then mining with side mining and drainage, draining or drainage and stoping drainage or drainage, overburden rock control and aquifer drainage degree, the artificial water diversion channel hidden danger caused by excessive drainage and drilling is reduced, the drilling engineering quantity and the drainage cost are reduced, and the safe, efficient and green mining of the composite water body downward pressing and covering coal resources is realized.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a water-control coal mining method and device under a composite water body.
Background
Coal accounts for more than 60% in the primary energy production and consumption structure of China for a long time, 37.5 million tons of coal are produced in 2019 by co-production, and the method has an important effect on economic development of China. The geological mining conditions and the hydrogeological conditions of coal mines in China are different, complicated and changeable, the types of water bodies are thousands of states, and the current situation of coal pressing of the water bodies is complicated. According to incomplete statistics, the coal reserves threatened by water damage in China account for about 27 percent of the proven reserves, the coal reserves threatened by water in key coal mines in China account for about 250 hundred million tons, and the coal reserves pressed under a water body account for about one hundred billion tons. Experts and scholars at home and abroad successfully mine coal under various water bodies such as oceans, rivers, lakes, reservoirs, loose aquifers, bedrock aquifers, karsts and the like, and a set of actual theory and safe mining technology and measures which accord with the coal mine in China are gradually formed. Aiming at different types of water bodies, the safe mining of different mining processes under the conditions of retaining waterproof, sand-proof and anti-collapse coal pillars and the like is successfully realized; aiming at the water damage prevention and control technology, the water damage control technologies such as roof water drainage depressurization, bottom plate limestone water grouting transformation and reinforcement are formed by mainly starting from the aspects of detection, monitoring, prediction, treatment, mine water reclamation, comprehensive utilization and the like. In recent years, coal mine water damage accidents generally fall, but large water damage accidents still rise, and casualties and property loss are caused by insufficient drainage capacity of disastrous water inrush. The reservation of the waterproof coal rock pillar causes a great loss of coal resources, and excessive drainage of water increases the water inflow and drainage cost of a mine, so that the underground water level is greatly reduced, and the ecological environment of a mining area is seriously damaged.
Along with the increase of the development strength of a coal base, the coal mining depth, thickness and scale are gradually increased, the mining technology such as high-intensity mining technology with large mining height, rapid propulsion and comprehensive caving is developed, the mining damage degree is obviously increased, and the water damage threat of the coal resource development is gradually developed into multiple composite water bodies such as a surface water body, a loose aquifer water body, a bedrock aquifer water body and the like from a single surface water body or an underground aquifer. Meanwhile, with the continuous progress of the scientific and technical level of coal, the continuous development of coal mining equipment, the revolution of mining technology and the importance of society on ecological environment protection, the combination of the water prevention and control technology needs, the development changes of coal mining methods and various related technologies thereof and the requirements of modern safety production is more compact. Therefore, it is urgently needed to develop a coal mining method under the condition of multiple water damage threats, and safe, efficient and green mining of coal resources covered under the composite water body is realized.
Disclosure of Invention
The embodiment of the invention provides a water-control coal mining method and device under a composite water body, which are used for solving the technical problems in the background technology or at least partially solving the technical problems in the background technology.
In a first aspect, an embodiment of the present invention provides a water-control coal mining method under a composite water body, including:
acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information, and obtaining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information;
and determining a water control mining scheme according to the water-rich subarea, the fracture safety subarea and the inrush water area.
More specifically, the step of determining a water control mining scheme according to the water-rich zone, the collapse safety zone and the gushing water zone specifically comprises:
determining the position relation between the water control main mining coal seam and the water body according to the water-rich subarea, the collapse safety subarea and the gushing water area;
and if the distance between the main coal mining layer and the water body is greater than the collapse safety partition, performing a top water mining scheme.
More specifically, after the step of determining the position relationship between the water-control main coal mining seam and the water body according to the water-rich zone, the collapse safety zone and the gushing water zone, the method further comprises the following steps:
and if the distance between the main coal mining layer and the water-rich subarea is less than or equal to the fracture safety subarea, carrying out a first dredging and second mining scheme.
More specifically, if the distance between the main coal mining layer and the water-rich zone is less than or equal to the fracture safety zone, the method further comprises:
and leading the water body in the water-rich subarea and the water body in the crack safety subarea to enter the water body through a water diversion crack zone upper micro-crack area in a recovery mode, realizing dredging and lowering of the water body, and simultaneously carrying out a scheme of dredging and mining while dredging.
More specifically, the top water mining scheme is that the water body is directly mined in the main mining coal bed without any treatment.
More specifically, the first dredging and second collecting scheme specifically means that the size of a hydrophobic hole is determined according to water layer pressure information and water volume information of a water-rich partition;
and after the water body in the water-rich subarea is drilled and dredged, coal mining is carried out.
More specifically, the scheme of dredging while mining specifically means that a water-bearing layer which is dredged and lowered by drilling and a water-bearing layer which is located in the range of the micro cracking zone of the water guide crack zone control different water guide crack zone zones to enter the range of the water-bearing layer through a mining process, and the water-bearing layer is gradually dredged and lowered by means of the water conductivity difference of the mining crack;
and carrying out simultaneous dredging and simultaneous mining on the water body in the water-rich subarea.
In a second aspect, an embodiment of the present invention provides a water-control coal mining device under a composite water body, including:
the acquisition module is used for acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information so as to obtain a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information;
and the coal mining module is used for determining a water control mining scheme according to the water-rich subarea, the collapse safety subarea and the gushing water area.
In a third aspect, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the program to implement the steps of the water-control coal mining method under the composite water body according to the first aspect.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the water-control coal mining method under a composite water body according to the first aspect.
The water-controlled coal mining method and device under the composite water body provided by the embodiment of the invention acquire the spatial relationship between different water bodies and a main mining coal layer by detecting the water body and rock mass, comprehensively consider the double factors of coal mine safety and economic rationality based on the overburden failure rule and the water-rich characteristic of a water-bearing stratum, combine specific geological mining conditions and corresponding coal mining processes, combine top water mining with drainage or drainage and mining with drainage and drainage after drilling, combine drilling drainage and mining with drainage at the same time, combine drilling drainage or drainage with drainage or drainage, combine overburden rock control with drainage and drainage degree of the water-bearing stratum, take water on a working face as a balance point without forming disasters, control the water inflow size and water burst form of the working face, realize safe, efficient and green mining of coal resources covered under the water body, and greatly reduce artificial water diversion channels caused by excessive drainage and drilling, reducing the drilling work amount and the drainage cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a water-control coal mining method under a composite water body according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a downhole hydrophobic borehole arrangement according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the dredging drawdown according to an embodiment of the present invention;
FIG. 4 is a flow chart of a water-controlled coal mining design as described in another embodiment of the present invention;
FIG. 5 is a schematic structural view of a water-control coal mining device under a composite water body according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a water-control coal mining method under a composite water body in an embodiment of the invention, as shown in fig. 1, including:
step S1, acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information, and obtaining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information;
and step S2, determining a water control mining scheme according to the water-rich subarea, the collapse safety subarea and the gushing water area.
Specifically, the occurrence characteristic information of the composite water body described in the embodiment of the invention specifically refers to the occurrence characteristic, thickness and water-rich hydrogeological parameters of the aquifer of the main coal mining layer roof are probed by adopting comprehensive probing means such as drilling, geophysical prospecting and chemical prospecting, and the occurrence characteristic information of the composite water body is obtained based on probing results and the collected drilling columnar data and the comprehensive analysis of the mine geological and hydrogeological conditions.
The prediction information of the coal seam overlying strata damage height described in the embodiment of the invention mainly takes the existing actual measurement data of the mine as the main data to predict a new mining area. If the mine is not actually measured, the method of theoretical calculation, numerical simulation and similar simulation is comprehensively adopted. The theoretical calculation is based on empirical formula and analogy method. If the thickness of the coal seam of the mine or the mining process meets the layered mining of the thin, medium and thick coal seams, the damage of the overlying strata is estimated to be calculated by a formula of building, water body, railway and main roadway coal pillar reservation and coal pressing mining specification; if the thickness of the coal seam of the mine is a thick coal seam, the mining process is to mine full height or caving coal at one time, the overburden failure height is estimated by mainly using an analog method, and the fracture ratio (the ratio of the height of the water-guiding fracture zone to the mining thickness) is determined by comparing similar mines at the periphery, so that the overburden failure height is calculated. Meanwhile, the overburden rock damage law is researched by matching with numerical simulation and similar simulation means.
And determining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the coal bed, roof aquifer, water-resisting layer and surface water distribution information in the composite water occurrence characteristic information, the high-accuracy prediction based on the overlying rock damage of the main mining coal bed and the water filling rule evaluation of the aquifer.
And if the distance between the main coal mining layer and the water body is greater than the collapse safety subarea, performing a top water mining scheme, and if the distance between the main coal mining layer and the water-rich subarea is less than or equal to the collapse safety subarea, performing a first dredging and then mining scheme or a side mining and side dredging scheme.
The mining scheme in the embodiment of the invention can be a scheme combining top water mining with drainage or drainage mining, combining drilling drainage first and then mining with drainage while mining, combining drilling drainage or drainage with recovery drainage or drainage, and combining overburden rock control with aquifer drainage degree.
The embodiment of the invention obtains the spatial relationship between different water bodies and the main coal mining layer by detecting the water bodies and the rock masses, comprehensively considers the dual factors of coal mine safety and economy and reasonableness based on the overburden rock destruction rule and the water-rich characteristic of the aquifer, combines the specific geological mining conditions and the corresponding coal mining process, by combining top water mining with drainage or drainage mining, combining drilling with side mining and drainage after drainage, combining drilling with drainage while drainage, combining drilling with drainage or drainage and drainage or drainage with recovery, and combining overburden control with aquifer drainage degree, the technology allows the water on the working face to be discharged without forming disasters as balance points, controls the water inflow amount and the water inflow form of the working face, realizes safe, efficient and green mining of coal resources covered under water, greatly reduces the artificial water diversion channel hidden danger caused by excessive drainage drilling, and reduces the drilling engineering quantity and the drainage cost.
On the basis of the above embodiment, the step of determining a water control mining scheme according to the water-rich zone, the collapse safety zone and the inrush water zone specifically includes:
determining the position relation between the water control main mining coal seam and the water body according to the water-rich subarea, the collapse safety subarea and the gushing water area;
and if the distance between the main coal mining layer and the water body is greater than the collapse safety partition, performing a top water mining scheme.
Specifically, the top water mining described in the embodiment of the invention refers to a top water mining scheme without any treatment on a water body.
On the basis of the above embodiment, after the step of determining the position relationship between the water-control main coal mining seam and the water body according to the water-rich zone, the collapse safety zone and the gushing water zone, the method further includes:
and if the distance between the main coal mining layer and the water-rich subarea is less than or equal to the fracture safety subarea, carrying out a first dredging and second mining scheme.
Specifically, fig. 2 is a schematic diagram of an arrangement of downhole hydrophobic boreholes according to an embodiment of the present invention, as shown in fig. 2, including a loose aquifer, a water-conducting fracture zone peak, a bedrock aquifer, a caving zone peak, a coal seam, and a hydrophobic borehole.
The first dredging and second mining design described in the embodiment of the invention means that for a strong water-bearing body which is close to a main mining coal seam (located in the range of a caving zone and a water guide crack zone), first dredging and second mining are carried out on the water body, and the purpose is to adopt a hydrophobic drilling hole to pre-drain the static reserve volume of the water-bearing layer, reduce the water-bearing layer pressure and the instantaneous water volume at the initial stage of stoping, avoid the instantaneous water inflow volume of a working face from exceeding the limit and limit the water inflow volume of the working face in a bearable range.
On the basis of the above embodiment, the method further includes:
if the distance between the main coal mining layer and the water-rich subarea is less than or equal to the fracture safety subarea,
and leading the water body in the water-rich subarea and the water body in the crack safety subarea into the inverted crack zone subarea in a recovery mode, so as to realize dredging and lowering of the water body and coal mining.
Specifically, fig. 3 is a schematic diagram of the mining dredging and descending process according to an embodiment of the present invention, as shown in fig. 3, the water-guiding fractured zone is divided into a collapse zone, a severe fracture zone, a general fracture zone and a micro-fracture zone from bottom to top, and the micro-fracture zone can perform double functions of achieving safe mining and limiting the water inflow. For the aquifer dredged by drilling and the aquifer positioned in the range of the micro-cracking zone of the water-guiding crack zone, the different water-guiding crack zone partitions are controlled to enter the range of the aquifer through the stoping process, the gradual dredging of the aquifer is realized by means of the difference of the water conductivity of the stoping crack, and the water inflow amount and the water inflow form are controlled.
On the basis of the embodiment, the first drainage and second drainage scheme specifically means that the depth, the interval and the number of the drainage drill holes are determined according to water layer pressure information and water volume information in the water-rich subarea;
and after the water body in the water-rich subarea is drilled and dredged, coal mining is carried out.
Specifically, the drainage hole design described in the embodiment of the invention is to form dredging funnels right above the working surface and in the goaf at the rear, so that the drainage funnels have a dredging effect on the water level of the aquifer and are controlled within a safe water quantity range.
The embodiment of the invention can also be used. The method can adopt the comprehensive methods of an up-and-down drilling water injection test, a drilling peeping technical method, a geophysical prospecting method, microseismic monitoring and the like to realize the design of an automatic water body monitoring system and the observation design of the overlying rock damage height. Different water bodies in the mining influence range are monitored by arranging an underground automatic monitoring system, so that the mining influence degree of the water bodies is monitored. The content comprises hydrological information such as surface water level, flow velocity and the like; water level, water quantity, water pressure, water temperature, water quality and the like of the aquifer.
Fig. 4 is a flow chart of a water-controlled coal mining design according to another embodiment of the present invention, as shown in fig. 4, including: collecting mine geological data, hydrogeological data and mining data, and determining occurrence characteristic information of the composite water body by combining drilling, geophysical exploration and three-dimensional geological modeling; determining the prediction information of the overburden rock damage height of the main mining coal bed through field actual measurement, an empirical formula or a crack ratio method; carrying out accurate evaluation and zoning on the threat of the composite water body according to the occurrence characteristic information of the composite water body and the damage height prediction information of the overlying strata of the main mining coal seam, and determining a water-rich zone, a collapse safety zone and a burst water zone; thereby obtaining a composite water body underground water control mining scheme; adopting top water mining for water bodies outside the range of the water guide crack zone, and adopting a scheme of first dredging and then mining or dredging and mining simultaneously for water bodies in the range of the water guide crack zone; meanwhile, dynamic monitoring is carried out on the whole mining process, the information of surface water and aquifer is monitored in real time, and meanwhile, the damage of overlying strata is monitored highly in real time, so that safe, efficient and green mining of coal resources pressed by the composite water body is finally realized.
Fig. 5 is a schematic structural view of a water-control coal mining device under a composite water body according to an embodiment of the present invention, as shown in fig. 5, including: an acquisition module 510 and a coal mining module 520; the acquiring module 510 is configured to acquire composite water occurrence characteristic information and coal seam overlying strata damage height prediction information, so as to obtain a water-rich partition, a collapse safety partition and a gushing water partition according to the composite water occurrence characteristic information and the coal seam overlying strata damage height prediction information; the coal mining module 520 is used for determining a water control mining scheme according to the water-rich subarea, the collapse safety subarea and the gush water area.
The apparatus provided in the embodiment of the present invention is used for executing the above method embodiments, and for details of the process and the details, reference is made to the above embodiments, which are not described herein again.
The embodiment of the invention obtains the spatial relationship between different water bodies and the main coal mining layer by detecting the water bodies and the rock masses, comprehensively considers the dual factors of coal mine safety and economy and reasonableness based on the overburden rock destruction rule and the water-rich characteristic of the aquifer, combines the specific geological mining conditions and the corresponding coal mining process, by combining top water mining with drainage or drainage mining, combining drilling with side mining and drainage after drainage, combining drilling with drainage while drainage, combining drilling with drainage or drainage and drainage or drainage with recovery, and combining overburden control with aquifer drainage degree, the technology allows the water on the working face to be discharged without forming disasters as balance points, controls the water inflow amount and the water inflow form of the working face, realizes safe, efficient and green mining of coal resources covered under water, greatly reduces the artificial water diversion channel hidden danger caused by excessive drainage drilling, and reduces the drilling engineering quantity and the drainage cost.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 6, the electronic device may include: a processor (processor)610, a communication Interface (Communications Interface)620, a memory (memory)630 and a communication bus 640, wherein the processor 610, the communication Interface 620 and the memory 630 communicate with each other via the communication bus 640. The processor 610 may call logic instructions in the memory 630 to perform the following method: acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information, and obtaining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information; and determining a water control mining scheme according to the water-rich subarea, the fracture safety subarea and the inrush water area.
In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information, and obtaining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information; and determining a water control mining scheme according to the water-rich subarea, the fracture safety subarea and the inrush water area.
Embodiments of the present invention provide a non-transitory computer-readable storage medium storing server instructions, where the server instructions cause a computer to execute the method provided in the foregoing embodiments, for example, the method includes: acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information, and obtaining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information; and determining a water control mining scheme according to the water-rich subarea, the fracture safety subarea and the inrush water area.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A water-control coal mining method under a composite water body is characterized by comprising the following steps:
acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information, and obtaining a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information;
and determining a water control mining scheme according to the water-rich subarea, the fracture safety subarea and the inrush water area.
2. The water-control coal mining method under the composite water body according to claim 1, wherein the step of determining a water-control mining scheme according to the water-rich subarea, the collapse safety subarea and the gush water subarea specifically comprises:
determining the position relation between the water control main mining coal seam and the water body according to the water-rich subarea, the collapse safety subarea and the gushing water area;
and if the distance between the main coal mining layer and the water body is greater than the collapse safety partition, performing a top water mining scheme.
3. The method for controlled water coal mining under a composite water body according to claim 2, wherein after the step of determining the positional relationship between the water-controlled main coal mining seam and the water body according to the water-rich zone, the collapse safety zone and the gushing water zone, the method further comprises:
and if the distance between the main coal mining layer and the water-rich subarea is less than or equal to the fracture safety subarea, carrying out a first dredging and second mining scheme.
4. A method of controlled water coal mining under a composite body of water according to claim 3, further comprising:
if the distance between the main coal mining layer and the water-rich subarea is less than or equal to the fracture safety subarea;
and (3) enabling the water body in the water-rich subarea and the water body in the crack safety subarea to enter a water body from a micro crack area at the upper part of the water guide crack belt in a recovery mode, so as to realize gradual dredging and lowering of the water body and carry out a scheme of dredging and mining while dredging.
5. The water-control coal mining method under the composite water body according to claim 2, wherein the top water mining scheme is that the mining is directly carried out on the main mining coal bed without any treatment on the water body.
6. The water-control coal mining method under the composite water body according to claim 3, wherein the first dredging and second mining scheme specifically means that the depth, the interval and the number of the drainage drill holes are determined according to water layer pressure information and water body water amount information in the water-rich subarea;
and (3) carrying out drilling and dredging or draining on the water body in the water-rich subarea, and then carrying out coal mining.
7. The water-control coal mining method under the composite water body according to claim 4, wherein the scheme of dredging while dredging specifically means that for the aquifer which has been dredged and fallen through drilling and the aquifer which is located in the range of the micro-cracking zone of the water-guide crack zone, different water-guide crack zone partitions are controlled to enter the range of the aquifer through the stoping process, and the gradual dredging and falling of the aquifer is realized by means of the difference of the water conductivity of the stoping crack;
and carrying out simultaneous dredging and simultaneous mining on the water body in the water-rich subarea.
8. The utility model provides a accuse water coal mining device under compound water which characterized in that includes:
the acquisition module is used for acquiring composite water occurrence characteristic information and coal seam overlying rock damage height prediction information so as to obtain a water-rich subarea, a collapse safety subarea and a gushing water subarea according to the composite water occurrence characteristic information and the coal seam overlying rock damage height prediction information;
and the coal mining module is used for determining a water control mining scheme according to the water-rich subarea, the collapse safety subarea and the gushing water area.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of the method of water-controlled coal mining under a composite body of water of any of claims 1 to 6.
10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the method for water-controlled coal mining under a composite body of water according to any of claims 1 to 6.
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