CN103700141A - Multistage dimension geologic modeling analysis method of coal seam floor water gushing passageway - Google Patents
Multistage dimension geologic modeling analysis method of coal seam floor water gushing passageway Download PDFInfo
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Abstract
The invention relates to a multistage dimension geologic modeling analysis method of a coal seam floor water gushing passageway. The method comprises the following steps: processing original geological data to form a three-dimensional multistage dimension geologic model modeling database; using data in the three-dimensional multistage dimension geologic model modeling database to perform modeling on a primary dimension foundation geologic framework model, a secondary dimension rock mass detailed geologic model and a tertiary dimension rock mass fracture network module; analyzing the shape of a coal seam floor fault and the influence on water gushing of elements of attitude; searching a minimum shearing resistance path in a rock stratum according to the extension resistance variation of the fracture, and finding out a coal seam floor water gushing passageway; performing contrastive analysis on the coal seam floor water gushing passageway and a multistage dimension geologic model, and giving a coal seam floor water gushing risk evaluation. The method has the characteristics that the evaluation efficiency and accuracy are improved by describing geologic features related to water gushing taking 'stratum-lithology-fracture' three-stage dimension in three-dimensional space, and the guarantee is provided for safety production in coal mines.
Description
Technical field
The present invention relates to mine water inrush and evaluate field, particularly a kind of multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage.
Background technology
Coal seam bottom water bursting particularly grey gushing water difficult to understand is the Serious geological disasters problem that China coalfield exists.Think at present in the groundwater regime relevant with water bursting in mine, gushing water water condition just forms before gushing water substantially occurring, and the process that gushing water passage forms and related factors condition have direct significance for the prediction and prevention of gushing water.Under mining-induced stress and effect of water pressure, the forming process of the disrumpent feelings gushing water passage in rock stratum is core content and the key issue of Analysis of Water Inrush.Wherein, tectonic structure and rock mass physical character play conclusive effect to water bursting disaster.Therefore the geologic model of, accurately setting up coal seam bottom water bursting passage is to solve Water Inrush prediction and one of basis of evaluating.
In coal production process, underground mining environment is in a three-dimensional dynamic change three-dimensional system, three-dimensional geological modeling technology is to improve a kind of effective means that multi-source data utilizes level, promotes security effectiveness, it has caused the pay attention to day by day of the numerous areas such as geology, mining, Geotechnical Engineering, compare with traditional two-dimentional geology method for expressing, three-dimensional model can be expressed complicated geological structure and boundary condition in complete and accurate ground, reproduces intuitively spatial and the mutual relationship thereof of geologic unit.
Three-dimensional geological modeling method has following several at present:
1, the stratum modeling based on boring, the method automaticity is high, but can not process the challenges such as fracture.
2, the geologic body surface modeling method based on section, it can process the Geologic modeling problem of more complicated, but because needs are safeguarded a large amount of cross-sections etc., modeling efficiency and model dynamically update aspect and do not possess advantage.
3, three-dimensional space data interpolation, the method lays particular emphasis on the expression of the non-homogeneous of geologic body built-in attribute, space interpolation is aftertreatment and the application stage of Geologic modeling, need under the constraint of aforementioned two kinds of modeling method achievements, carry out modeling, forms three-dimensional geological attribute model.
The three-dimensional geological modeling method in existing colliery also mainly rests on to be described on layered geology structure and fracture,simple, the complicacy of the coal mining geology condition that is still beyond expression, more be difficult to meet the modeling problems such as Coal Mine Disasters prediction, cannot provide geologic model more accurately for mine floor water-bursting predicting and evaluation.
In sum, provide a kind of passage of coal seam bottom water bursting more accurately to analyze required Geologic modeling analytical approach, become those skilled in the art's problem demanding prompt solution.
The information that is disclosed in this background of invention technology part is only intended to deepen the understanding to general background technology of the present invention, and should not be regarded as admitting or imply that in any form this information structure has been prior art known in those skilled in the art.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of passage of coal seam bottom water bursting more accurately and analyzes required Geologic modeling analytical approach.
In order to address the above problem, the invention provides a kind of multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage, described analytical approach comprises:
1) obtain original geologic data;
2) by multistage scale parameter, according to one's analysis original geologic data is processed, form three-dimensional multistage yardstick geologic model model database, described multistage scale parameter is the dimensional analysis in " stratum-lithology-crack " three grades according to one's analysis, and wherein said " stratum-lithology-crack " yardstick corresponds to respectively one-level yardstick, secondary yardstick and three grades of yardsticks;
3) use the data in described three-dimensional multistage yardstick geologic model model database to carry out the modeling of one-level yardstick basic geology frame model, wherein, one-level yardstick is basic geology framework size, structure be take stratum system and the main lithologic criteria's layer that " group " be unit, builds regional fracture and the large structural plane extending of range of influence stability simultaneously;
4) use the data in described three-dimensional multistage yardstick geologic model model database, and the modeling result of described one-level yardstick basic geology frame model of take is constraint condition, carry out the modeling of secondary yardstick rock mass detailed geological model, wherein, the corresponding coal production engineering of secondary yardstick yardstick, builds Fu Shui rock stratum and minor fault and buried structure;
5) use the data in described three-dimensional multistage yardstick geologic model model database, and the modeling result of described secondary yardstick rock mass detailed geological model of take is constraint condition, carry out three grades of yardstick fracture network model modelings, wherein, three grades of yardsticks are Fracture Networks model dimension, build the Fracture Networks of rock mass;
6) path of minimum shearing resistance, i.e. potential coal seam bottom water bursting passage in the search of the modeling result based in step 3)～step 5) rock mass;
7) modeling result based in step 3)～step 5) is set up three-dimensional multistage yardstick geological property model;
8) Numerical results of potential coal seam bottom water bursting passage and three-dimensional multistage yardstick geological property model is carried out to binding analysis, thus the risk of comprehensive evaluation coal seam bottom water bursting.
Preferably, described method further comprises, 9) according to the actual geologic data of mine, constantly dynamically revise described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models, re-start assessment of w ater inrush risk.
Preferably, described step 2) comprise by original geologic data and forms three-dimensional modeling source data through data preparation classification, then pass through multistage scale parameter described three-dimensional modeling source data and form three-dimensional multistage yardstick geologic model model database according to one's analysis.
Preferably, in step 3), the modeling of described one-level yardstick basic geology frame model is with borehole data, geologic section, planimetric map, seismic interpretation achievement and tomography curved surface basis of formation geology skeleton, stratum system and relevant lithologic character stratum; In step 4), the modeling of described secondary yardstick rock mass detailed geological model is in conjunction with borehole observation and physical prospecting data, the meticulous hierarchical information of object Seam Roof And Floor lithology of take segments and local structure described stratum system as basis, realizes meticulous structure and the local little structure of Fu Shui rock stratum and water proof rock stratum and processes; In step 5), described three grades of yardstick fracture network model modelings are to build Fracture Networks model by the statistical study to underworkings geometric parameters of fissures, build the probability model that crack distributes, and generate the Fracture Networks of complicated rock mass.
Preferably, described step 6) comprises form and the impact of attitude on gushing water thereof of analyzing seat earth tomography itself, and according to crack propagation change in resistance, in search rock mass, the path of minimum shearing resistance, forms potential coal seam bottom water bursting passage.
Preferably, described one-level yardstick basic geology frame model and secondary yardstick rock mass detailed geological model adopt take borehole data as main, and planimetric map, cross-sectional data are the modeling method of line constraint, build three-dimensional geological interface.
Preferably, the fault complex of described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models is processed and is comprised X-type cross fault tectonic and stacked tile type fault tectonic.
Preferably, trap-up is processed and comprised overall space split plot design and fault surface projection epitaxy; Described overall space split plot design utilizes trap-up that space is cut apart, and the aspect that completes in each partition space builds; Described fault surface projection epitaxy is according to tomography and aspect contact relation, by upper dish tomographic projection extension, by extension border and lower wall fault boundary, inside and outside two parts are cut apart in whole layer position, inside and outsidely all carry out aspect generation, then the result of twice generation is merged.
Preferably, described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models can carry out model modification, described model modification is divided into local updating and whole updating, wherein local updating is only adjusted model part, and whole updating is carried out whole renewal to model.
Preferably, described three-dimensional multistage yardstick geological property model is on the basis of described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models, to further describe the model that geologic parameter distributes; The geologic parameter of described three-dimensional multistage yardstick geological property model includes rock stress parameter and geology physical parameter, adopts numerical analysis method to carry out gushing water process simulation.
The invention has the beneficial effects as follows:
1, the present invention is for being applicable to the multiple dimensioned fine modeling method of colliery three-dimensional geological structure, and emphasis has solved multiple dimensioned model space one coupling and quick, the unified processing to challenge (especially zone of fracture, fault complex and many-valued problem).
2, dynamically updating of multiple dimensioned geologic model, emphasis solves the processing of main body modeling method and dynamically updates the ability of data and complete fast the generation of complicated geological model and correction according to the dynamic exploitation in colliery.
3, propose the seat earth rock cranny gushing water passage method for searching based on multiple dimensioned model, for inquiring into coal seam bottom water bursting hazard assessment, provide new approaches.
Accompanying drawing explanation
Fig. 1 is according to the implementing procedure figure of the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention.
Fig. 2 A is border, one-level yardstick stratum (lithology) schematic diagram according to the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention.
Fig. 2 B is the secondary yardstick lithologic boundary schematic diagram according to the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention.
Fig. 2 C is three grades of yardstick lithology crack schematic diagram according to the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention.
Fig. 3 A is according to the plane restriction schematic diagram of the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention, and what be wherein positioned at top is the planimetric map of geologic body, and what be positioned at below is the sectional view of geologic body.
Fig. 3 B is the section constraint schematic diagram according to the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention, and what be wherein positioned at top is the planimetric map of geologic body, and what be positioned at below is the sectional view of geologic body.
Fig. 4 A is according to plane and the diagrammatic cross-section of the trap-down of the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention.
Fig. 4 B is according to plane and the diagrammatic cross-section of the trap-up of the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention.
Fig. 4 C is according to plane and the diagrammatic cross-section of the many-valued processing of the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention.
Fig. 5 A is according to the overall space split plot design schematic diagram of the analysis trap-up of Fig. 4 B.
Fig. 5 B is according to the fault surface projection epitaxy schematic diagram of the analysis trap-up of Fig. 4 B.
Fig. 6 A is the fault complex mode schematic diagram according to the X-type fault intersection of Fig. 5 B.
Fig. 6 B is according to the fault complex mode schematic diagram of the stacked tile type structure of Fig. 5 B.
Fig. 7 is the many-valued processing schematic diagram according to Fig. 4 C.
Embodiment
A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement to be much different from alternate manner described here, and those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that, so the present invention is not subject to the restriction of following public specific embodiment.
Below in conjunction with Fig. 1, further the process of the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention is described in detail.
The multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage of the present invention comprises the steps:
1) obtain original geologic data;
2) by multistage scale parameter, according to one's analysis original geologic data is processed, form three-dimensional multistage yardstick geologic model model database, described multistage scale parameter is " stratum-lithology-crack " dimensional analysis according to one's analysis, and wherein said " stratum-lithology-crack " yardstick corresponds to respectively one-level yardstick, secondary yardstick and three grades of yardsticks;
3) use the data in described three-dimensional multistage yardstick geologic model model database to carry out the modeling of one-level yardstick basic geology frame model, wherein, one-level yardstick is basic geology framework size, structure be take stratum system and the main lithologic criteria's layer that " group " be unit, builds regional fracture and the large structural plane extending of range of influence stability simultaneously;
4) use the data in described three-dimensional multistage yardstick geologic model model database, and the modeling result of described one-level yardstick basic geology frame model of take is constraint condition, carry out the modeling of secondary yardstick rock mass detailed geological model, wherein, the corresponding coal production engineering of secondary yardstick yardstick, builds Fu Shui rock stratum and minor fault and buried structure;
5) use the data in described three-dimensional multistage yardstick geologic model model database, and the modeling result of described secondary yardstick rock mass detailed geological model of take is constraint condition, carry out three grades of yardstick fracture network model modelings, wherein, three grades of yardsticks are Fracture Networks model dimension, build the Fracture Networks of rock mass;
6) path of minimum shearing resistance, i.e. potential coal seam bottom water bursting passage in the search of the modeling result based in step 3)～step 5) rock mass;
7) modeling result based in step 3)～step 5) is set up three-dimensional multistage yardstick geological property model;
8) Numerical results of potential coal seam bottom water bursting passage and three-dimensional multistage yardstick geological property model is carried out to binding analysis, thus the risk of comprehensive evaluation coal seam bottom water bursting.
Step 1)～2), in, first the various original geologic data in colliery is carried out to data preparation classification and multistage scale parameter according to one's analysis, formation three-dimensional multistage yardstick geologic model model database.Specifically, first obtain relevant geologic data and (comprise geotechnical boring data, Exploration profile data, two dimension geology, landform map, remote sensing images and physical prospecting, Geochemical Data etc.), according to three of " stratum-lithology-crack " grades of yardstick conceptual data models, the original geology of collecting is carried out to data preparation classification, set up three-dimensional geological integrated data base, then carry out multistage scale parameter and be translated into according to one's analysis multiple dimensioned vector model, receptible three-dimensional multistage yardstick geologic model model database (comprising main body modeling data and bound data) all while forming the modeling of different scale geologic model.
Then in step 3)～5) in, utilize multistage yardstick Geologic modeling analytical approach of the present invention to process data, this multistage yardstick Geologic modeling analytical approach is used different scale to carry out three-dimensional geological structural modeling.Wherein, one-level yardstick basic geology frame model is with basis of formation geology skeletons such as borehole data, geologic section, planimetric map, seismic interpretation achievement and tomography curved surfaces, and stratum system is fine to " group " and main lithologic character stratum (reference lamina).Secondary yardstick rock mass detailed geological model is coal seam fine geology modeling, in conjunction with data such as borehole observation and physical prospectings, take the meticulous hierarchical information of object Seam Roof And Floor lithology as basis, realizing the renewal of meticulous lithology classification, minor fault processes, build Fu Shui rock stratum and minor fault and buried structure, control the border of the geologic bodies such as sand body, coal seam and dirt band.Finally by the data in three-dimensional multistage yardstick geologic model model database, especially to parameters of fissure, also the i.e. statistical study to underworkings geometric parameters of fissures, application Monte Carlo method builds the probability model that crack distributes, and generates three grades of yardstick fracture network models of complicated rock mass.
As described in step 9), according to the actual geologic data of mine, constantly dynamically revise geologic model in addition, re-start analysis of possibility of water inrush evaluation.Carry out as mentioned above also passing through the model evaluation correction of each yardstick and dynamically updating after modeling, can carry out assay to seat earth rock cranny gushing water passage.
After mining, floor rock is damaged, rock cranny model also will change, as step 6)～8) as described in, modeling result based on above-mentioned three-dimensional multistage yardstick geologic model, also be one-level yardstick basic geology frame model modeling result, secondary yardstick rock mass detailed geological model modeling result and three grades of yardstick fracture network model modeling results, carry out the search of coal seam bottom water bursting passage, in the search of gushing water passage, analyze the form (mechanical property of tomography itself, water guide characteristic etc.) and the impact of attitude on gushing water, according to crack propagation change in resistance, the higher path of connection rate---the path of minimum shearing resistance in search rock mass, it is potential gushing water passage, and combine and comprehensively analyze with the numerical analysis of three-dimensional multistage yardstick geological property model, thereby the 3 d effect graph that generates coal seam bottom water bursting high risk region provides coal seam bottom water bursting risk assessment.
Particularly, step 7)～8) in, for further explication de texte gushing water hazard assessment, in conjunction with searching gushing water passage, utilize numerical method to carry out gushing water simulation.Main in numerical simulation what use is three-dimensional multistage yardstick geological property model, and described three-dimensional multistage yardstick geological property model is actually on the basis of three-dimensional multistage yardstick geologic model of the present invention further the model of pledge parameter distribution in analog.On the whole, three-dimensional multistage yardstick geologic model is a multiple dimensioned geologic structure model, an also i.e. framework, and three-dimensional multistage yardstick geological property model is content more specifically in this framework.Three-dimensional multistage yardstick geologic model, cannot be directly used in based on numerical analyses such as wired difference and finite elements and carry out gushing water simulation, and three-dimensional multistage yardstick geological property model can be described rock stress parameter and the geology physical parameter comprising on arbitrfary point, space, can be used for numerical simulation gushing water process, for verifying the gushing water passage of searching based on three-dimensional multistage yardstick geologic model, in conjunction with actual conditions, provide on the other hand the comprehensive evaluation result of analysis of possibility of water inrush on the one hand.
Generally, method of the present invention has been considered tectonic structure and the impact of rock mass structure on mine water inrush disaster under different scale, multistage yardstick Geologic modeling analytical approach has been proposed, mainly solved integrated approach and the complex model Construct question of the multi-source datas such as probing on different scale, physical prospecting and change spy, also i.e. two aspects below:
1, the multistage yardstick data integrating method based on multi-source data.
For step 1)～2), original geologic data obtains vector data after data preparation classification, also be three-dimensional modeling source data, these three-dimensional modeling source datas form three-dimensional geological integrated data base, and then through the multistage scale parameter of these vector datas is converted to multiple dimensioned vector data them according to one's analysis, these data have formed three-dimensional multiple dimensioned geologic model model database, form three-dimensional multiple dimensioned geologic model modelling data source.Its essential implementation comprises:
The first, the present invention proposes three grades of yardstick conceptual data models in " stratum-lithology-crack ", the structure of data is divided into three grades of yardsticks, one-level yardstick is mainly stratum system, main lithologic criteria's layer and some regional fractures and extends larger structural plane, range of influence stability, is obtained by geologic prospect data such as basic geological data and probings; The corresponding coal production engineering of secondary yardstick yardstick, builds Fu Shui rock stratum and minor fault and buried structure, is mainly lithologic character stratum and some minor faults, complicated rock mass and buried structure etc.; Three grades of yardsticks are Fracture Networks model dimension, for the stability of local rock mass, have important impact.Three grades of yardsticks in described " stratum-lithology-crack " correspond to respectively one-level yardstick, secondary yardstick and three grades of yardsticks, particularly, corresponding described one-level yardstick basic geology frame model (stratum), the foundation of the model of described secondary yardstick rock mass detailed geological model (especially rich water lithology) and such three yardsticks of described three grades of yardstick fracture network models (crack), the model-composing three-dimensional multistage yardstick geologic model of these three yardsticks.
The second, the coupling integration of multiple dimensioned model.On conceptual model basis, based on point, line, curved surface, the multiple dimensioned Vector Data Models such as body (surface), first realize storage, spatial topotaxy and the semantic relation management of data under same yardstick, each geologic data of separate sources is semantically being connected each other, on locus, be consistent, then, set up the contact of these data on different scale, in database storage the data recording of subordinate's yardstick its belong to the key of higher level's yardstick data, such as having stored Shanxi group (key 100) in one-level yardstick for information about, in secondary yardstick, in the information recording of this group rock stratum (as mud stone), want key in storage 100, data on such two yardsticks have formed contact on geology semanteme and locus, illustrate that the data that secondary yardstick mantlerock data will be take on one-level yardstick are boundary constraint, guaranteed like this correctness of different scale data on spatial relation, realization is without slot coupling.
2, the structure of three grades of scale complex models
For step 3)～5), below three of different scale in the present invention model construction main points are described.
Data in described three-dimensional multistage yardstick geologic model model database are for carrying out modeling to described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models.
One-level yardstick basic geology frame model carries out modeling to basic geology skeleton, stratum system and main lithologic character stratum, particularly, by basis of formation geology skeletons such as borehole data, geologic section, planimetric map, seismic interpretation achievement and tomography curved surfaces, stratum system is fine to " group " and main lithologic character stratum (reference lamina).
Described stratum system is segmented secondary yardstick rock mass detailed geological model and local structure carries out modeling, from described three-dimensional multistage yardstick geologic model model database, obtain data, and the modeling result of described one-level yardstick basic geology frame model of take is constraint condition, realize meticulous lithology distributions, the renewal of minor fault is processed, build Fu Shui rock stratum and minor fault and buried structure, and control stratum system boundary condition, particularly, in conjunction with data such as borehole observation and physical prospectings, take the meticulous hierarchical information of object Seam Roof And Floor lithology as basis, realize meticulous lithology classification, the renewal of minor fault is processed, control sand body, the border of the geologic body such as coal seam and dirt band.
Three grades of yardstick fracture network model construction Fracture Networks models, from described three-dimensional multistage yardstick geologic model model database, obtain data, and the modeling result of described secondary yardstick rock mass detailed geological model of take is constraint condition, by the statistical study to underworkings geometric parameters of fissures, application Monte Carlo method builds the probability model that crack distributes, and generates the Fracture Networks of complicated rock mass.
Specifically, structure for one-level yardstick basic geology frame model of the present invention, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models, wherein need to solve two key issues, be the modeling disposal route of complex geologic body in the coupling of different scale modeling result and model, describe further below.
In three grades of yardstick conceptual data models in above-mentioned " stratum-lithology-crack ", having described one-level yardstick, to take stratum system and main lithologic character stratum be basic object, range of influence stability, the engineering yardstick of the corresponding Safety of Coal Mine Production of secondary yardstick, three grades of yardsticks are local fracture network model.From Fig. 2 A, Fig. 2 B and Fig. 2 C, can find out, on three grades of concepts of scale model bases, fine modeling under secondary yardstick is that the geological boundry of take under one-level yardstick is space constraint, fracture network be take secondary Scale Model as boundary constraint, can set up the contact of different scale modeling result and spatial relationship semantic in geology, can realize multistage yardstick geologic model without slot coupling.This is also for fine geology modeling and dynamically updating provides the foundation.
For complicated geological volume modeling disposal route, be that boring is that main modeling method or section is that main modeling method is all to utilize the surface (upper surface, lower surface or integral surface) of the constraint Points And lines structure geology in same geologic body.In coal production, main modeling data form comprises the multi-source datas such as boring, sectional view, planimetric map and fault information, so Geologic modeling need to be processed these data simultaneously.
Consider coal production feature, utilize and need the more modeling section of maintenance update based on section method, be difficult to carry out fast Geologic modeling.The present invention will be take borehole data as main, planimetric map, cross-sectional data are the modeling method of line constraint, its process is to utilize in modeling source data to form from same geological object point, the line data that build geological stratum, and the method for employing triangulation realizes the geological surface of being expressed by triangle irregular network and builds.Surface mesh generation adopts DSI(discrete smooth interpolation) algorithm; Utilize boring point, profile line, planar boundary and fault boundary point on same stratum to build stratum curved surface; Utilize the border on same tomography to generate tomography curved surface; After all stratal surfaces and fault surface form, the geological interface that will belong to same geologic body (stratum) merges, thereby forms the geologic body of sealing.
As shown in Figure 3A, stratum or geologic body pinching point can be drawn a circle to approve constraint by planimetric map, and as shown in Figure 3 B, between well, " the unknown " region and simple fold can retrain by profile line.At stratal configuration, relatively clear and stabilized zone increases the fluctuating that virtual borehole is controlled stratum, reduces the number of safeguarding section.If above process is in step 2) in guaranteed that boring, planimetric map and sectional view are consistent at corresponding point attribute, just automatable, carry out model construction, and be easy to dynamically editor and revise.
For karst collapse col umn, goaf and dirt band etc., there is certain space distribution border and affect the geologic body that mine safety is exploited, by planimetric map, control the structure that border and the constraint of the longitudinal geometric shape of sectional view can complete complex three-dimensional confining surface, adopt post-processing approach, by body boolean operation, be embedded in whole geologic model.
Provide the present invention below for the solution of tomography and many-valued processing.As shown in Figure 4 A, for trap-down, owing to there not being aspect overlap problem, when layer plane generates using fault surface (real is tomography and aspect intersecting lens) as constraint condition.As shown in Figure 4 B, for trap-up, emphasis of the present invention improves automation modeling flow process.The impact forming by analyzing trap-up opposite, provides following two schemes.
1, overall space split plot design.This kind of solution is to utilize trap-up that space is cut apart, the structure of finished surface in each partition space then, as shown in Figure 5A.This scheme is applicable to major fault and processes and can cause the distortion of different spaces face junction.
2, fault surface projection epitaxy.According to tomography and aspect contact relation, by upper dish projection extension certain distance, by extension border W and lower wall fault boundary X, whole layer position is divided into two parts inside and outside the W/X of frontier district like this, as shown in Figure 5 B; Then inside surrounds border by W/X, looks unfamiliar into, outside by synthetic " hole " the participation aspect generation of upper dish fault boundary and extension border; Finally the result of twice generation is merged.Through this method of actual verification, be applicable to minor fault and process, in concrete enforcement, the selection of epitaxy method has certain influence to aspect mesh quality.
For fault complex mode, from modeling process angle emphasis, X-type fault intersection situation and stacked tile type structure situation have been solved.
1, X-type cross tomography.As shown in Figure 6A, for only there being trap-down situation, by fault complex border, be constraint participation structure face; And need to carry out two step processing for the situation that occurs trap-up, and adopt fault surface projection epitaxy to take extension combined boundary as constraint participation structure face, second step is processed border inner region again;
2, stacked tile type structural fault.As shown in Figure 6B, in stacked tile type structural fault, can still adopt fault surface projection epitaxy during the general many-valued problem that occurs only being caused by two dishes, but when occurring three dishes and above situation, need single tomography independent processing or directly adopt along fault strike and make section, utilizing outline line algorithm process local circumstance.
As shown in Figure 4 C, many-valued problem is to adopt to increase boost line mode, many-valued body is divided into two, to many-valued numbering and body generation separately, as Fig. 4 C.This method is also applicable to complicated many-valued problem, as shown in Figure 7, now focuses on providing effective interactive tool specify the numbering of many-valued and be easy to updating maintenance.
As described in step 8), for three-dimensional multistage yardstick geologic model of the present invention (being also one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models), its precision also needs assessment to revise and dynamically update.Complicacy and multi-solution due to geological phenomenon, by man-machine interaction instrument, the correctness of judgment models is also revised model, according to coal production dynamic data, adjust corresponding scale modelling data source simultaneously, and then three-dimensional multistage yardstick geologic model of the present invention is assessed and revised, this assessment need to all be carried out three yardsticks with correction.
In coal production, especially the data of considering seat earth planimetric map and tunnel measured section figure are in the situation of the main data that need to upgrade, one-level yardstick basic geology frame model upgrades slower, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network model modifications are than very fast, and the scheme that therefore concrete model dynamically updates is as described below:
The renewal of three-dimensional multistage yardstick geologic model of the present invention is mainly divided into local updating and whole updating, and wherein local updating is only model part to be adjusted according to data, and new data is while having larger variation to geological knowledge, needs whole updating.
The typical case more kind of new data mainly comprises: boring is upgraded, position of fault upgrades, tunnel parameter is upgraded and stratigraphic boundary is upgraded.
1, boring is upgraded.Firsts and seconds Scale Model is had to considerable influence.By boring and model, compare, iff stratal surface space geometry profile is adjusted, implement the adjustment of adjacent holes local interpolation; If boring stratum and model difference are larger, even stratum reversion, need to re-recognize geological phenomenon, need to re-start model construction.
2, position of fault upgrades.In coal production, position of fault upgrades mainly has considerable influence to secondary Scale Model.Main renewal comprises that move the position of fault surface and the adjustment of fault throw, by the renewal of planimetric map and sectional view, corresponding aspect is regenerated.
3, stratigraphic boundary is upgraded.By thickness of coal seam and the roof and floor disclosing in tunnelling process, change, the elevation that carries out Seam Roof And Floor aspect upgrades.When stratum horizontal boundary changes, by upgrading planimetric map and sectional view overlying strata Contact Boundary, corresponding aspect is regenerated, wherein, if formation contact does not change, only stratum contact position changes, and carries out part and generates; If larger variation occurs formation contact, when interlayer contact relation is re-recognized, need whole modeling.
The present invention is on prior art basis, base oneself upon technological innovation, in conjunction with the actual needs emphasis in coal production, set up fast three-dimensional multistage yardstick geologic model effectively accurately, and on this model basis, carry out its practical application methods on mine coal seam Water Inrush passage is searched, promote three-dimensional geological modeling and dimensionally descend the application level in the geology environment rebuilt of space in colliery, instruct mine safety mining.
Above-described embodiment is for illustrative principle of the present invention and effect thereof, but the present invention is not limited to above-mentioned embodiment.Those skilled in the art all can, under spirit of the present invention and category, in claim protection domain, modify to above-described embodiment.Therefore protection scope of the present invention, should cover as claims of the present invention.
Claims (10)
1. a multistage yardstick Geologic modeling analytical approach for mine floor gushing water passage, described analytical approach comprises:
1) obtain original geologic data;
2) by multistage scale parameter, according to one's analysis original geologic data is processed, form three-dimensional multistage yardstick geologic model model database, described multistage scale parameter is " stratum-lithology-crack " dimensional analysis according to one's analysis, and wherein said " stratum-lithology-crack " yardstick corresponds to respectively one-level yardstick, secondary yardstick and three grades of yardsticks;
3) use the data in described three-dimensional multistage yardstick geologic model model database to carry out the modeling of one-level yardstick basic geology frame model, wherein, one-level yardstick is basic geology framework size, structure be take stratum system and the main lithologic criteria's layer that " group " be unit, builds regional fracture and the large structural plane extending of range of influence stability simultaneously;
4) use the data in described three-dimensional multistage yardstick geologic model model database, and the modeling result of described one-level yardstick basic geology frame model of take is constraint condition, carry out the modeling of secondary yardstick rock mass detailed geological model, wherein, the corresponding coal production engineering of secondary yardstick yardstick, builds Fu Shui rock stratum and minor fault and buried structure;
5) use the data in described three-dimensional multistage yardstick geologic model model database, and the modeling result of described secondary yardstick rock mass detailed geological model of take is constraint condition, carry out three grades of yardstick fracture network model modelings, wherein, three grades of yardsticks are Fracture Networks model dimension, build the Fracture Networks of rock mass;
6) path of minimum shearing resistance, i.e. potential coal seam bottom water bursting passage in the search of the modeling result based in step 3)～step 5) rock mass;
7) modeling result based in step 3)～step 5) is set up three-dimensional multistage yardstick geological property model;
8) Numerical results of potential coal seam bottom water bursting passage and three-dimensional multistage yardstick geological property model is carried out to binding analysis, thus the risk of comprehensive evaluation coal seam bottom water bursting.
2. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 1, wherein, described method further comprises, 9) according to the actual geologic data of mine, constantly dynamically revise described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models, re-start assessment of w ater inrush risk.
3. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 1, wherein, described step 2) comprise that by original geologic data, passing through data preparation classification forms three-dimensional modeling source data, then pass through multistage scale parameter described three-dimensional modeling source data formation three-dimensional multistage yardstick geologic model model database according to one's analysis.
4. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 1, wherein, in step 3), the modeling of described one-level yardstick basic geology frame model is with borehole data, geologic section, planimetric map, seismic interpretation achievement and tomography curved surface basis of formation geology skeleton, stratum system and relevant lithologic character stratum;
In step 4), the modeling of described secondary yardstick rock mass detailed geological model is in conjunction with borehole observation and physical prospecting data, the meticulous hierarchical information of object Seam Roof And Floor lithology of take segments and local structure described stratum system as basis, realizes meticulous structure and the local little structure of Fu Shui rock stratum and water proof rock stratum and processes;
In step 5), described three grades of yardstick fracture network model modelings are to build Fracture Networks model by the statistical study to underworkings geometric parameters of fissures, build the probability model that crack distributes, and generate the Fracture Networks of complicated rock mass.
5. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 1, wherein, described step 6) comprises form and the impact of attitude on gushing water thereof of analyzing seat earth tomography itself, according to crack propagation change in resistance, in search rock mass, the path of minimum shearing resistance, forms potential coal seam bottom water bursting passage.
6. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 4, wherein, described one-level yardstick basic geology frame model and the modeling of secondary yardstick rock mass detailed geological model adopt take borehole data as main, planimetric map, cross-sectional data are the modeling method of line constraint, build three-dimensional geological interface.
7. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 6, wherein, the fault complex of described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models is processed and is comprised X-type cross fault tectonic and stacked tile type fault tectonic.
8. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 7, wherein, processes and comprises overall space split plot design and fault surface projection epitaxy trap-up; Described overall space split plot design utilizes trap-up that space is cut apart, and the aspect that completes in each partition space builds; Described fault surface projection epitaxy is according to tomography and aspect contact relation, by upper dish tomographic projection extension, by extension border and lower wall fault boundary, inside and outside two parts are cut apart in whole layer position, inside and outsidely all carry out aspect generation, then the result of twice generation is merged.
9. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 1, wherein, described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models can carry out model modification, described model modification is divided into local updating and whole updating, wherein local updating is only adjusted model part, and whole updating is carried out whole renewal to model.
10. the multistage yardstick Geologic modeling analytical approach of mine floor gushing water passage according to claim 1, wherein, described three-dimensional multistage yardstick geological property model is on the basis of described one-level yardstick basic geology frame model, secondary yardstick rock mass detailed geological model and three grades of yardstick fracture network models, to further describe the model that geologic parameter distributes; The geologic parameter of described three-dimensional multistage yardstick geological property model includes rock stress parameter and geology physical parameter, adopts numerical analysis method to carry out gushing water process simulation.
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