CN113449890A - Efficient utilization and optimized allocation method for coal mine water area - Google Patents
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Abstract
The invention discloses a method for efficiently utilizing and optimally allocating coal mine water areas, which relates to the technical field of unconventional water resource management and comprises the following steps: acquiring the water demand of each water user in the region, wherein the water user comprises production, life and ecology; acquiring the water supply amount and water quality of each water supply source in the region, wherein the water supply sources comprise surface water, underground water, coal mine water and other unconventional water resources; according to the water supply quantity and the water quality of each water supply source and the water demand of different water consumers, a regional water resource optimization configuration model is constructed, and the model is solved to obtain the configuration scheme of each water supply source; and acquiring the water transmission and distribution capacity, the water drainage capacity, the pipe network connectivity and the possibility of water transmission and distribution for each water user in the area, and combining the configuration scheme to obtain the optimal configuration scheme of the coal mine water. The invention brings coal mine water into regional water resource allocation to form a regional production and ecological allocation method, and solves the double problems that the coal mine water in regions is abundant and cannot be fully utilized, and the ecological environment needs to be protected urgently.
Description
Technical Field
The invention relates to the technical field of unconventional water resource management, in particular to a method for efficiently utilizing and optimizing allocation of a coal mine water area.
Background
In areas rich in coal and little water, development of coal mines causes a great deal of deep groundwater to be extracted. In Shanmeng area, the water gushing amount of coal mine is large, the utilization mode is mostly internal consumption of a mining area, and redundant coal mine water is discharged after reaching the standard. At present, coal mine enterprises do not have a complete interconnected pipe network system, which may cause the disordered discharge of coal mine water, on one hand, the environment is polluted, and on the other hand, precious underground water resources are wasted. Therefore, the coal mine water is required to be brought into the regional water resource unified allocation range.
Many experts and scholars propose development and utilization schemes of coal mine water, such as reconstruction of underground reservoirs, use of the coal mine water as backup water sources, use of the coal mine water as peripheral production water, underground power generation, greening water, incorporation of the water into city pipe networks after advanced treatment and the like, so as to ensure that unconventional water sources such as drainage water, reclaimed water and the like are fully and efficiently utilized, and therefore, the utilization of unconventional water such as coal mine water and the like needs to be enhanced in water shortage areas, and in cities with coal mine water resources, local development planning, circular economy development planning and the like refer to full utilization of the coal mine water resources (namely mine drainage water). Due to the fact that the quality of coal mine water in various regions is different and the condition difference of conventional water resources in the regions is obvious, the comprehensive utilization and optimal configuration mode of the coal mine water need to be considered according to actual conditions. Therefore, how to bring coal mine water into regional water resources for uniform configuration and fully utilize unconventional water resources such as coal mine water according to actual conditions is a problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a method for efficiently utilizing and optimally blending coal mine water areas, which makes full use of coal mine water resources, widens the utilization ways of coal mine water in the areas, and provides available stable water sources for water users of regional water ecological systems and the like.
In order to achieve the above purpose, the invention provides the following technical scheme:
a coal mine water area efficient utilization and optimized allocation method comprises the following steps:
step one, acquiring water demand of each water user in an area; the water consumers comprise production, life and ecology, and the water demands comprise water demand and water quality;
step two, acquiring the water supply amount and the water quality of each water supply source in the region; the water supply source comprises surface water, underground water, coal mine water and other unconventional water resources;
step three, according to the water supply quantity and the water quality of each water supply source and the water demand of different water consumers, a regional water resource optimization configuration model is constructed, and the model is solved to obtain the configuration scheme of each water supply source;
and step four, acquiring the water transporting and distributing capacity, the water discharging capacity, the pipe network connectivity and the possibility of transporting and distributing water to each water user in the area, and combining the configuration scheme to obtain the optimal configuration scheme of the coal mine water.
Further, the method for acquiring the water supply amount of the surface water and the underground water in the step two comprises the following steps:
adopting regional water resource evaluation results; if no result is obtained, the following steps:
the surface water resource amount is calculated by adopting hydrological observation data with the series length of more than 20a, including rich, flat and dry years, and the surface runoff is calculated by directly utilizing the data; calculating the short-term observation data with the series length smaller than 20a after carrying out related interpolation extension or rainfall interpolation extension on the measured runoff series; according to different utilization conditions, the available typical annual runoff is determined by statistically calculating the annual average flow frequency of the river and is used as the available amount of surface water.
Calculating underground water resources by adopting a water balance method, and calculating the respective supply quantity, discharge quantity, storage quantity and exploitable quantity of underground water in the region; the supply amounts comprise: precipitation infiltration capacity, lateral runoff capacity, canal irrigation infiltration capacity and well irrigation return capacity; each excretion amount includes: evaporation capacity of the submerged water, drainage capacity of the river channel, lateral outflow and actual exploitation capacity of the underground water.
Further, the method for obtaining the water supply amount of the coal mine water in the step two comprises the following steps:
estimating the water inflow of the coal mine water in the area;
and obtaining the available amount of the coal mine water according to the water treatment loss rate of the coal mine enterprises, namely the coal mine water supply amount.
Further, in the first step, according to the regional water resource planning data, the water demand of production, ecological and domestic water consumers in the region is analyzed or rechecked.
Furthermore, in the second step, according to the survey or the statistical data of the water resource bulletin, the water quality of other water supply sources except the coal mine water in the area is analyzed, and the water quality of the coal mine water is obtained by adopting a sampling detection method.
Further, the water inflow of the coal mine water in the region is estimated by using a deterministic method or a non-deterministic method, wherein the deterministic method comprises a water balance method, an analytical method, a numerical method and the like, and the non-deterministic method comprises a hydrogeological comparison method, a correlation analysis method, a fuzzy mathematical model, a grey system, a time series analysis method and the like.
According to the technical scheme, the invention discloses and provides a method for efficiently utilizing and optimizing allocation of a coal mine water area, and compared with the prior art, the method has the following beneficial effects:
(1) the invention calculates the water supply amount of the coal mine water in the region, brings the coal mine water into the regional water resource for uniform configuration, forms the regional water resource optimal configuration mode containing unconventional water sources such as the coal mine water, and provides stable water resources for production, life and ecology in the region, particularly ecological water consumers while effectively utilizing the coal mine water. The invention solves the double problems that the water of coal mines is abundant and a reasonable utilization way needs to be found in the northwest rich coal and water-poor areas, the ecological environment is fragile and protection is needed urgently.
(2) The invention provides a method for uniformly allocating coal mine water into regional water resources, which has the characteristics of systematicness, operability and reproducible popularization, can widen the comprehensive utilization way of coal mine water in coal-rich and water-poor regions, improve the utilization efficiency of unconventional water sources, improve the water shortage condition of regional ecosystems, and provide solution ideas and technical support for regional unconventional water resource management and ecological protection work.
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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, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the process steps of the present invention;
FIG. 2 is a schematic diagram of water distribution and transportation engineering in an area according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The embodiment of the invention discloses a method for efficiently utilizing and optimally allocating a coal mine water area, which comprises the following steps of:
step one, acquiring water demand of each water user in an area; the water consumers comprise production, life and ecology, and the water demands comprise water demand and water quality.
Acquiring the available water quantity of surface water and the exploitable amount of underground water according to regional water resource evaluation data; and analyzing or reviewing the water demand of production, living and ecological water users in the region by using regional water resource planning data.
Step two, acquiring the water supply amount and the water quality of each water supply source in the region; the water supply source comprises surface water, underground water, coal mine water and other unconventional water resources, and the other unconventional water resources comprise reclaimed water, rainwater and the like.
The method for obtaining the water supply amount of the coal mine water comprises the following steps: estimating the coal mine water inflow amount in the region by using a deterministic method or a non-deterministic method according to conditions such as regional hydrogeology, coal mining mode scale and the like; and according to the water treatment loss rate of the coal mine enterprises, the available amount of the coal mine water is obtained by multiplying the water inflow by (1-loss rate), namely the water supply amount of the coal mine water. The deterministic method comprises a water balance method, an analytic method, a numerical method and the like, and the non-deterministic method comprises a hydrogeology comparison method, a correlation analysis method, a fuzzy mathematical model, a gray system, a time series analysis method and the like. Sampling and detecting the water quality of the treated coal mine water, and determining the purposes of the coal mine water with different water qualities.
The method for acquiring the water supply amount of the surface water and the underground water comprises the following steps:
adopting regional water resource evaluation results; if no result is obtained, the following steps:
the surface water resource amount is calculated by adopting hydrological observation data with the series length of more than 20a, including rich, flat and dry years, and the surface runoff is calculated by directly utilizing the data; calculating the short-term observation data with the series length smaller than 20a after carrying out related interpolation extension or rainfall interpolation extension on the measured runoff series; according to different utilization conditions, the available typical annual runoff is determined by statistically calculating the annual average flow frequency of the river and is used as the available amount of surface water.
Calculating underground water resources by adopting a water balance method, and calculating the respective supply quantity, discharge quantity, storage quantity and exploitable quantity of underground water in the region; the supply amounts comprise: precipitation infiltration capacity, lateral runoff capacity, canal irrigation infiltration capacity and well irrigation return capacity; each excretion amount includes: evaporation capacity of the submerged water, drainage capacity of the river channel, lateral outflow and actual exploitation capacity of the underground water.
Meanwhile, the future water supply and demand situation is pre-judged according to regional social and economic development planning, historical data and the like; and analyzing the water demand satisfaction degree of each water user under different water supply conditions according to the judgment result, and comparing the difference value between the water demand and the available water supply quantity, wherein the water demand is large, the water supply quantity is small, and the water demand cannot be satisfied.
And step three, according to the water supply quantity and the water quality of each water supply source and the water demand of different water consumers, constructing a regional water resource optimal configuration model by taking the water quantity and the water quality of water resources of all parts of the region and the water quantity and the water quality demand of each water consumer as constraint conditions according to the maximum comprehensive economic, social and environmental benefits, and solving the optimal configuration model by utilizing a multi-objective evolutionary algorithm, a particle swarm algorithm, an artificial neural network and other intelligent optimization algorithms, so as to obtain the configuration scheme of each water supply source.
And step four, acquiring the water delivery and distribution capacity, the water drainage capacity, the pipe network connectivity and the possibility of delivering and distributing water to each water user in the area, and adjusting the configuration scheme by combining the future water supply and demand situation, the future water delivery and distribution project planning, the water demand satisfaction degree of each water user and the like so as to obtain the optimal configuration scheme of the coal mine water.
The technical scheme of the invention is further explained by taking a certain area of inner Mongolia autonomous region Erdos city as an example and combining the attached drawings:
(1) regional production, life and ecological water demand
Calculating water demand for production and life
According to the relevant planning results, the water demand forecasting conditions of different horizontal years in the region are shown in table 1.
Table 1 area different horizontal annual water demand prediction units: wanm3
Due to the development speed, the difference between the predicted value of the industrial water demand and the actual water demand is large, and the following water demand situation analysis is shown.
② calculating water demand of landscape water system
According to the design of the Wuqi landscape water system engineering, the area of the landscape lake water surface is 196.4 ten thousand meters2Average water depth of 1m and water storage capacity of 196.4 ten thousand m3(ii) a The water surface area of the drainage channel is 7.68 ten thousand meters in total2. If the average water surface evaporation capacity of the landscape water system is 1387mm in many years, the annual evaporation capacity of the landscape water system is 283.06 ten thousand meters3. If the landscape lake changes water twice according to the year, and all the water is changed every time, the water demand is 392.8 ten thousand meters3。
Thirdly, calculating the water demand of the water ecosystem
According to investigation, the region belongs to the abdomen of the Mausu sand field, water resources are insufficient in nature, the water ecosystem is weak, and the water ecosystem, particularly the lake glancing has important functions of species protection, climate regulation, sand wind prevention and the like. Considering the water demand of the landscape water system and the ecological system of the lake-paste and the water demand of the landscape water system is calculated by a rating method to obtain 675.9 ten thousand meters3The minimum water supplement quantity for maintaining the basic protection target of the important lake is calculated by the protection target determination and the regional water balance method to be about 1842 ten thousand meters3Total water demand of about 2517.9 km3。
(2) Coal mine water available quantity calculation and coal mine water quality analysis
The current situation of the area is that 6 mines are put into production, the productivity is 6100 ten thousand t/a, and the productivity is planned to 8500 ten thousand t/a in 2030. According to the actual investigation condition, the water inrush quantity of 6 coal mines during coal mine production is calculated by a water-rich coefficient method to be about 5110 ten thousand meters3(ii) a According to the linear relation between the water inflow and the coal mine yield, the estimated 2030 year coal mine water inflow can be 5800 ten thousand meters3About 7100 km3. According to statistical data, the water consumption of 6 coal mines in 2020 accounts for 727 ten thousand m3Taking out coalThe treatment loss of a mineral water advanced treatment plant is 15 percent, and the available quantity of coal mine water reaches 3725.6 ten thousand meters in 20203。
According to actual survey data, after advanced treatment, the water quality of the coal mine water can reach the III-class standard of surface water, and the water quality requirements of a landscape water system and a lake glancing water can be completely met.
(3) Horizontal annual water supply and demand situation analysis in region
Since 2012 the strictest water resource management system is implemented, the annual water consumption of the region is generally stable, and generally judged, the annual water consumption of the region is relatively stable in the future period, but the water consumption structure is changed profoundly. According to the statistical conditions of the water resource bulletin, the domestic water is not changed much compared with the current situation, and the water supply source is underground water, so that the water supply guarantee rate is high, and the water source is stable; agricultural water is reduced year by year, main water supply sources are underground water and surface water, the water sources are stable, and the variability is smaller compared with the current situation in the future (the statistics of each year is shown in table 2). The industrial water and the ecological environment water are greatly changed.
Table 2 statistical units of water consumption in 2010-2019 in area: wanm3
The industrial water consumption is kept at 5000 ten thousand meters in 20203On the left and right sides, after the industrial water saving and emission reduction action is implemented, the possibility that the industrial water consumption is continuously and greatly increased is reduced. Even with the increasing trend from 2012 to 2019, it was proposed that the industrial water consumption in 2025 and 2030 was 8140.25 km per ten thousand respectively310534.3 km3。
As can be seen from the comparison between the industrial water consumption and the predicted industrial water consumption in the table 2, the predicted value of the industrial water demand is larger, but the water supplement amount of the water ecosystem is not considered in the water demand prediction result. The water quality requirements of industrial water are different, water sources are various, surface water, underground water, reclaimed water, rainwater, coal mine water and the like exist, and the water quality requirements of a water ecological system are not high. Therefore, the coal mine water can be optimally and reasonably allocated in industrial and water ecological water preferentially, and the allocated coal mine water amount is 3725.6 ten thousand m in 20203。
(4) Regional water resource optimization configuration
The excess coal mine water except the utilization and consumption of the coal mine needs to be brought into water resources for uniform configuration, and can be used for industry, ecological environment and urban miscellaneous use. According to the available amount of coal mine water and the minimum water replenishing requirement of a water ecological system, the configurable coal mine water amount is 3725.6 ten thousand meters in 20203Can fully satisfy 2517.9 km of water ecosystem3The water supplement quantity of the water-saving type water-saving device is required, and the rest water quantity can be used for industry.
(5) Current and future water delivery and distribution engineering measures
Water demand of landscape water system 675.9 km3(the sum of the water exchange amount and the evaporation amount), the lake paste has the ecological water requirement of about 1842 ten thousand m3The total water supplement amount of the water ecological system is 2517.9 ten thousand meters3. Water ecological system water replenishing and water delivery engineering is arranged according to the principle of the current pipelines being utilized nearby and the economic and reasonable engineering scale, the landscape water system water replenishing mainly considers the reclaimed water, the reclaimed water of the first-stage sewage treatment plant and the sewage treatment plant in the Galiuu town of the Maowu desert control industrialization demonstration base is taken as the water replenishing water source, the treatment capacity of the two sewage treatment plants is 2.3 km in total3D, reduced water supplement amount of about 839.5 km3And the water replenishing requirement can be met. After 6 coal mine rich and residual coal mine water are processed, collected and conveyed, a unified coal mine water conveying pipeline is formed and supplied to regional water ecological systems, the water conveying and distributing project comprises 6 main water conveying pipelines and 1 water conveying branch line, the total length of the water conveying lines is 127.23km, the water conveying and distributing project refers to fig. 2, yellow river water is quoted as lake paste 1 for water supplement, and the coal mine water is used for the rest of lake pastes for water supplement.
In conclusion, a coal mine water utilization method for regional water ecosystem protection is formed, and a coal mine water resource allocation mode of a certain region in Ordos city of autonomous city of inner Mongolia is realized.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A coal mine water area efficient utilization and optimized allocation method is characterized by comprising the following steps:
acquiring the water demand of each water user in the area; the water consumers comprise production, life and ecology, and the water demands comprise water demand and water quality;
acquiring the water supply amount and the water quality of each water supply source in the area; the water supply source comprises surface water, underground water and coal mine water;
according to the water supply quantity and the water quality of each water supply source and the water demand of different water consumers, a regional water resource optimization configuration model is constructed, and the model is solved to obtain a configuration scheme of each water supply source;
and acquiring the water transmission and distribution capacity, the water drainage capacity, the pipe network connectivity and the possibility of water transmission and distribution for each water user in the area, and combining the configuration scheme to obtain the optimal configuration scheme of the coal mine water.
2. The method for efficient utilization and optimized blending of coal mine water areas according to claim 1, wherein the method for obtaining the water supply of surface water and groundwater comprises:
adopting regional water resource evaluation results; if no result is obtained, the following steps:
the surface water resource amount is calculated by adopting hydrological observation data with the series length of more than 20a, including rich, flat and dry years, and the surface runoff is calculated by directly utilizing the data; calculating the short-term observation data with the series length smaller than 20a after carrying out related interpolation extension or rainfall interpolation extension on the measured runoff series; according to different utilization conditions, the available typical annual runoff is determined by carrying out statistical calculation on the annual average flow frequency of the river and is used as the available amount of surface water;
calculating underground water resources by adopting a water balance method, and calculating the respective supply quantity, discharge quantity, storage quantity and exploitable quantity of underground water in the region; the supply amounts comprise: precipitation infiltration capacity, lateral runoff capacity, canal irrigation infiltration capacity and well irrigation return capacity; each excretion amount includes: evaporation capacity of the submerged water, drainage capacity of the river channel, lateral outflow and actual exploitation capacity of the underground water.
3. The method for efficient utilization and optimized blending of coal mine water areas according to claim 1, wherein the method for obtaining the water supply of coal mine water comprises:
estimating the water inflow of the coal mine water in the area;
and obtaining the available amount of the coal mine water according to the water treatment loss rate of the coal mine enterprises, namely the coal mine water supply amount.
4. The method of claim 1, wherein water demand of production, ecological and domestic water users in a region is analyzed or reviewed based on regional water resource planning data.
5. The method of claim 1, wherein the quality of water from water sources other than coal mine water in the area is analyzed according to survey or statistical data from water resource bulletin, and the quality of coal mine water is obtained by sampling.
6. The method of claim 3, wherein the amount of water burst in the coal mine is estimated using deterministic methods or non-deterministic methods, the deterministic methods including water balance, analytical, numerical, the non-deterministic methods including hydrogeological mapping, correlation, fuzzy mathematical model, grey scale and time series analysis.
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