CN110851991B - Underground water flow numerical simulation method - Google Patents
Underground water flow numerical simulation method Download PDFInfo
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- CN110851991B CN110851991B CN201911125359.0A CN201911125359A CN110851991B CN 110851991 B CN110851991 B CN 110851991B CN 201911125359 A CN201911125359 A CN 201911125359A CN 110851991 B CN110851991 B CN 110851991B
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Abstract
The invention relates to the technical field of geological exploration, and particularly discloses a numerical simulation method for underground water flow. The method comprises the following steps: 1. collecting basic data and establishing a hydrogeology and engineering geology model; 2. carrying out ground water level monitoring, and identifying and verifying the hydrogeologic model by utilizing observation data; 3. collecting rock mechanics analysis samples, and correcting various parameters of an engineering geological model; 4. developing simulation prediction of influence of coal seam mining on stability of overlying rock mass; 5. and comprehensively predicting the underground water level change of the aquifer by using an engineering geological model. The method can comprehensively consider the situation that the hydrogeological condition is changed due to the damage of the bottom plate of the overlying aquifer in the coal mining process; the parameter change of the hydrogeologic model after mining year by year is adjusted by combining the development condition of three zones after mining the coal mine, the parameter change is more consistent with the actual condition of the influence of mining the coal mine on the overlying aquifer, and the simulation analysis is more accurate.
Description
Technical Field
The invention belongs to the technical field of geological exploration, and particularly relates to a numerical simulation method for underground water flow.
Background
The underground coal mine excavated by using the underground working method can directly lead to the lowering of the underground water level of the overlying water-filled aquifer due to the influence of underground drainage engineering; on the other hand, the roof after the roadway is mined out collapses to enable the water guide crack of the upper rock body to develop, and the upper water-bearing layer is communicated, so that the excretion of the upper water-bearing layer is further increased. Due to the similarity of coal, oil gas and sandstone-type uranium ore-forming environments, the coal mines and the oil gas and uranium ore-forming output space layers in most basins are mutually overlapped, for example, in the Hundos basin, the uranium ore layers are directly overlapped on the main coal mining layer, and a space grid for 'upper uranium and lower coal' is formed. In the coal mining process, drainage and roof collapse can lead to the drop of the groundwater level of an overlying aquifer, so that the mining of regional water environment and overlying oil gas or sandstone uranium ore is adversely affected.
In the past, only the aquifer hydrogeologic parameters and the path supplementing and arranging conditions are considered, and the method for carrying out underground water flow numerical simulation calculation by using a fixed hydrogeologic model ignores the increase of the excretion and the change of the hydrogeologic conditions caused by the stability damage of overlying rock mass in coal seam exploitation.
Disclosure of Invention
The invention aims to provide a numerical simulation method for underground water flow, which solves the problem that the existing coal seam is mined by using a well with larger burial depth, an overlying aquifer of the coal seam is a main water filling source of a coal mine, and simulation prediction of the influence of the coal mine mining on the overlying aquifer is realized under the condition that the top of a goaf is managed by using a caving method after the coal mine mining is finished.
The technical scheme of the invention is as follows: the underground water flow numerical simulation method specifically comprises the following steps:
step 1, collecting basic data and establishing a hydrogeology and engineering geology model;
step 2, carrying out ground water level monitoring, and identifying and verifying the hydrogeologic model by using observation data;
step 3, collecting rock mechanics analysis samples, and correcting various parameters of the engineering geological model;
step 4, developing simulation prediction of influence of coal seam mining on stability of overlying rock mass;
and 5, comprehensively predicting the underground water level change of the aquifer by using the engineering geological model.
The step 1 specifically comprises the following steps:
step 1.1, collecting geology and hydrogeology of a region to be researched and engineering geology data;
step 1.2, determining hydrogeology and engineering geological conditions;
step 1.3, constructing a hydrogeology and engineering geology model;
step 1.3.1, constructing a hydrogeologic model by using GMS;
and 1.3.2, accurately describing a region to be researched by utilizing Midas, establishing an engineering geological model, and performing simulation calculation by utilizing Flac 3D.
The step 2 specifically includes:
step 2.1, carrying out dynamic monitoring of the underground water level by using the existing water-bearing layer observation holes, and using the obtained underground water level observation data;
step 2.2, identifying a hydrogeologic model by using drainage displacement and aquifer observation hole monitoring data in a coal mine experimental exploitation working stage;
and 2.3, carrying out hydrogeologic model verification by utilizing the water discharge after the production stop of the later coal mine and the monitoring data of the underground water level of the aquifer.
The step 3 specifically includes: and collecting core samples such as a coal seam roof and a water-bearing layer of the region to be researched, analyzing engineering mechanical parameters such as density, compressive strength, elastic modulus, poisson ratio and the like of the core samples, and correcting the engineering geological model by utilizing the measured parameters.
The step 4 specifically includes: according to the coal mining planning, carrying out rock mechanical stability simulation by using an established engineering mechanical model, and predicting influence data of a roof of a coal seam on stability of an overlying rock after the roof collapses; and after the formation of the coal mine goaf, calculating the development characteristics and development range data of the collapse zone, the fracture zone and the bending subsidence zone, and obtaining the influence data of the coal seam roof collapse on the hydrogeological parameters and the diameter-supplementing row conditions of the overlying aquifer.
The step 5 specifically includes:
step 5.1, simulating and predicting development characteristics and development range data of a collapse zone, a fracture zone and a bending dip zone by using the mechanical stability of the rock mass, and correcting the hydrogeologic model year by year in the exploitation process;
step 5.2, adjusting hydrologic model parameters according to the change of the hydrologic geological parameters of the aquifer and the conditions of the path supplementing and arranging after the mining of the coal mine in each year;
and 5.3, predicting the change data of the underground water level of the overlying aquifer after mining the coal mine for a plurality of years by utilizing hydrological model parameters.
The specific hydrogeology and engineering geological conditions determined in the step 1.2 are as follows: and determining the burial depth, distribution rule, lithology characteristics and hydrogeology and engineering geological conditions of each layer of the coal mine layer and the uranium mine aquifer.
In the step 1.3.1, the construction of the hydrogeologic model by using GMS specifically comprises the following steps: and carrying out parameter partitioning on the aquifer, giving boundary conditions, determining the path supplementing and arranging conditions, and generalizing the hydrogeologic model.
The invention has the remarkable effects that: the underground water flow numerical simulation method disclosed by the invention can comprehensively consider the situation that the hydrogeological conditions are changed due to the bottom plate damage of an overlying aquifer in the coal mining process from two aspects of the hydrogeological conditions and the engineering geological conditions; the parameter change of the hydrogeologic model after mining year by year is adjusted by combining the development condition of three zones after mining the coal mine, the parameter change is more consistent with the actual condition of the influence of mining the coal mine on the overlying aquifer, and the simulation analysis is more accurate.
Drawings
Fig. 1 is a schematic flow chart of an underground water flow numerical simulation method according to the present invention.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 1, a method for simulating underground water flow values specifically includes the following steps:
step 1, collecting basic data and establishing a hydrogeology and engineering geology model;
step 1.1, collecting geology and hydrogeology of a region to be researched and engineering geology data;
step 1.2, determining hydrogeology and engineering geological conditions;
determining the burial depth, distribution rule, lithology characteristics and hydrogeology and engineering geological conditions of each layer of the coal mine layer and the uranium mine aquifer;
step 1.3, constructing a hydrogeology and engineering geology model;
step 1.3.1, constructing a hydrogeologic model by using GMS;
carrying out parameter partitioning on the aquifer, giving boundary conditions, determining path supplementing and arranging conditions, and generalizing a hydrogeologic model;
step 1.3.2, accurately describing a region to be researched by utilizing Midas, establishing an engineering geological model, and performing simulation calculation by utilizing Flac 3D;
step 2, carrying out ground water level monitoring, and identifying and verifying the hydrogeologic model by using observation data;
step 2.1, carrying out dynamic monitoring of the underground water level by using the existing water-bearing layer observation holes, and using the obtained underground water level observation data;
step 2.2, identifying a hydrogeologic model by using drainage displacement and aquifer observation hole monitoring data in a coal mine experimental exploitation working stage;
step 2.3, carrying out hydrogeologic model verification by utilizing the water drainage amount after the production stop of the later coal mine and the monitoring data of the underground water level of the aquifer;
step 3, collecting rock mechanics analysis samples, and correcting various parameters of the engineering geological model;
collecting core samples such as a coal seam roof and a water-bearing layer of a region to be researched, analyzing engineering mechanical parameters such as density, compressive strength, elastic modulus, poisson ratio and the like of the core samples, and correcting an engineering geological model by utilizing the measured parameters;
step 4, developing simulation prediction of influence of coal seam mining on stability of overlying rock mass;
according to the coal mining planning, carrying out rock mechanical stability simulation by using an established engineering mechanical model, and predicting influence data of a roof of a coal seam on stability of an overlying rock after the roof collapses; after the formation of the coal mine goaf, calculating development characteristics and development range data of a collapse zone, a fracture zone and a bending subsidence zone, and obtaining influence data of the coal seam roof collapse on the hydrogeological parameters and the diameter-supplementing row conditions of the overlying aquifer;
step 5, comprehensively predicting the underground water level change of the aquifer by using an engineering geological model;
step 5.1, simulating and predicting development characteristics and development range data of a collapse zone, a fracture zone and a bending dip zone by using the mechanical stability of the rock mass, and correcting the hydrogeologic model year by year in the exploitation process;
step 5.2, adjusting hydrologic model parameters according to the change of the hydrologic geological parameters of the aquifer and the conditions of the path supplementing and arranging after the mining of the coal mine in each year;
and 5.3, predicting the change data of the underground water level of the overlying aquifer after mining the coal mine for a plurality of years by utilizing hydrological model parameters.
Claims (6)
1. The underground water flow numerical simulation method is characterized by comprising the following steps of: the method specifically comprises the following steps:
step 1, collecting basic data and establishing a hydrogeology and engineering geology model;
step 2, carrying out ground water level monitoring, and identifying and verifying the hydrogeologic model by using observation data;
step 3, collecting rock mechanics analysis samples, and correcting various parameters of the engineering geological model;
step 4, developing simulation prediction of influence of coal seam mining on stability of overlying rock mass;
according to the coal mining planning, carrying out rock mechanical stability simulation by using an established engineering mechanical model, and predicting influence data of a roof of a coal seam on stability of an overlying rock after the roof collapses; after the formation of the coal mine goaf, calculating development characteristics and development range data of a collapse zone, a fracture zone and a bending subsidence zone, and obtaining influence data of the coal seam roof collapse on the hydrogeological parameters and the diameter-supplementing row conditions of the overlying aquifer;
step 5, comprehensively predicting the underground water level change of the aquifer by using an engineering geological model;
step 5.1, simulating and predicting development characteristics and development range data of a collapse zone, a fracture zone and a bending dip zone by using the mechanical stability of the rock mass, and correcting the hydrogeologic model year by year in the exploitation process;
step 5.2, adjusting hydrologic model parameters according to the change of the hydrologic geological parameters of the aquifer and the conditions of the path supplementing and arranging after the mining of the coal mine in each year;
and 5.3, predicting the change data of the underground water level of the overlying aquifer after mining the coal mine for a plurality of years by utilizing hydrological model parameters.
2. The method for simulating the numerical value of underground water flow according to claim 1, wherein: the step 1 specifically comprises the following steps:
step 1.1, collecting geology and hydrogeology of a region to be researched and engineering geology data;
step 1.2, determining hydrogeology and engineering geological conditions;
step 1.3, constructing a hydrogeology and engineering geology model;
step 1.3.1, constructing a hydrogeologic model by using GMS;
and 1.3.2, accurately describing a region to be researched by utilizing Midas, establishing an engineering geological model, and performing simulation calculation by utilizing Flac 3D.
3. The method for simulating the numerical value of underground water flow according to claim 1, wherein: the step 2 specifically includes:
step 2.1, carrying out dynamic monitoring of the underground water level by using the existing water-bearing layer observation holes, and using the obtained underground water level observation data;
step 2.2, identifying a hydrogeologic model by using drainage displacement and aquifer observation hole monitoring data in a coal mine experimental exploitation working stage;
and 2.3, carrying out hydrogeologic model verification by utilizing the water discharge after the production stop of the later coal mine and the monitoring data of the underground water level of the aquifer.
4. The method for simulating the numerical value of underground water flow according to claim 1, wherein: the step 3 specifically includes: and collecting core samples of the coal seam roof and the aquifer of the area to be researched, analyzing the density, compressive strength, elastic modulus and poisson ratio engineering mechanical parameters of the core samples, and correcting the engineering geological model by utilizing the measured parameters.
5. The method for simulating the numerical value of groundwater flow according to claim 2, wherein: the specific hydrogeology and engineering geological conditions determined in the step 1.2 are as follows: and determining the burial depth, distribution rule, lithology characteristics and hydrogeology and engineering geological conditions of each layer of the coal mine layer and the uranium mine aquifer.
6. The method for simulating the numerical value of groundwater flow according to claim 2, wherein: in the step 1.3.1, the construction of the hydrogeologic model by using GMS specifically comprises the following steps: and carrying out parameter partitioning on the aquifer, giving boundary conditions, determining the path supplementing and arranging conditions, and generalizing the hydrogeologic model.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660427A (en) * | 2009-05-18 | 2010-03-03 | 中国矿业大学(北京) | Three-chart two-prediction method for quantitative evaluation and prediction of coal-bed top-plate water burst (inrush) conditions |
| CN105427376A (en) * | 2015-10-28 | 2016-03-23 | 中国矿业大学(北京) | Three-dimensional dynamic visualization method of water inrush of coal seam roof |
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| CN109871648B (en) * | 2019-03-11 | 2019-10-08 | 山东科技大学 | The construction method of groundwater resources three-dimensional visualization dynamic monitoring structural model |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660427A (en) * | 2009-05-18 | 2010-03-03 | 中国矿业大学(北京) | Three-chart two-prediction method for quantitative evaluation and prediction of coal-bed top-plate water burst (inrush) conditions |
| CN105427376A (en) * | 2015-10-28 | 2016-03-23 | 中国矿业大学(北京) | Three-dimensional dynamic visualization method of water inrush of coal seam roof |
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