CN101881182B - Simulation and forecast evaluation method for delaying water inrush by mine fracture structure - Google Patents

Simulation and forecast evaluation method for delaying water inrush by mine fracture structure Download PDF

Info

Publication number
CN101881182B
CN101881182B CN2010102259949A CN201010225994A CN101881182B CN 101881182 B CN101881182 B CN 101881182B CN 2010102259949 A CN2010102259949 A CN 2010102259949A CN 201010225994 A CN201010225994 A CN 201010225994A CN 101881182 B CN101881182 B CN 101881182B
Authority
CN
China
Prior art keywords
under
water
parameter
evaluation method
strain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010102259949A
Other languages
Chinese (zh)
Other versions
CN101881182A (en
Inventor
武强
朱斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Original Assignee
China University of Mining and Technology Beijing CUMTB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Mining and Technology Beijing CUMTB filed Critical China University of Mining and Technology Beijing CUMTB
Priority to CN2010102259949A priority Critical patent/CN101881182B/en
Publication of CN101881182A publication Critical patent/CN101881182A/en
Application granted granted Critical
Publication of CN101881182B publication Critical patent/CN101881182B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a simulation and forecast evaluation method for delaying water inrush by a mine fracture structure, comprising the follow steps: (1) putting forward an analysis method that mechanism for delaying water inrush, inoculation process and fracture structure hydraulic properties change with the time going because of the action of mining engineering under the condition of hydrogeological parameter variation due to stress strain redistribution; according to the water-rock interaction theory, analyzing circulation process of mutual action and mutual influence among stress, strain and permeance performance of the substances in fracture zone, and the genesis mechanism for hydraulic property conversion under the disturbance of the mining engineering; (2) according to the coupling rule of the mechanics parameters and the hydraulics parameter of the rock body, putting forward a rheology-seepage coupling simulation evaluation method under the variable parameter condition. The rheology-seepage coupling simulation evaluation method under the variable parameter condition builds the variable parameter rheology stress field and the seepage field coupling model by virtue of complying with the coupling rule of the mechanics parameters and the hydraulics parameter of the rock body, considering the substances in the fracture zone as rheopectic material, and basing on the rheological model of the rock body under the variable parameter condition.

Description

Simulation and forecast evaluation method for delaying water inrush by mine fracture structure
Technical field
The present invention relates to a kind of mine fracture structure gushing water simulation and forecast evaluation method, particularly a kind of simulation and forecast evaluation method for delaying water inrush by mine fracture structure.
Background technology
Water bursting in mine is a kind of serious down-hole disaster accident, and it brings huge harm to mining mineral resource, causes a large amount of economic losses and casualties every year.According to statistics, the gushing water accident relevant with fracture structure accounts for 85% of the total gushing water accident of China, and along with the pit mining degree of depth increases and the exploitation of group coal down, the fault zone delay gushing water accident that has retarding characteristic in time is more and more many.Fault zone postpones gushing water and is meant: when getting working face touches or do not find during near a certain fault zone any gushing water sign, but a period of time after work plane passes this fault zone, at the work plane rear or follow-up mining operation the hysteresis gushing water has taken place along fault zone, meet the fracture zero-time corresponding to mining operation and have one period period of delay, this class gushing water often is difficult to prediction in time, very big to mine safety production threat, the prominent watered-out well accident of the old ventilating shaft in ore deposit, the peak-to-peak Chinese parasol tree village is wherein typical case.Therefore, fracture structure delay gushing water formation mechanism and the research of prediction evaluation method are produced significant to ensureing mine safety.
The relevant water bursting in mine mechanism research of the home and abroad of prior art focuses mostly in the following aspects: (1) as external loads, considers water barrier block water classical formulas method---Si Liesaliefu equation, the water bursting coefficient method etc. of effect with hydraulic pressure; (2) by the water proof base plate adopt, press in the ore deposit and the hydraulic pressure acting in conjunction under the deformation and failure feature study gushing water mechanism mechanical model---" three bands down " are theoretical, original position is opened and split and the zero-bit failure theory; (3) with the systematology be theoretical foundation, the general decision analysis theory that multi-source information is compound.The gushing water mechanism research that preceding two kinds of methods are mainly carried out based on the theory of mechanics of classics, but there is significant limitation in it aspect determining in gushing water process analysis procedure analysis and gushing water time; A kind of method in back then is based on the analysis-by-synthesis evaluation of the dangerous influence factors of all kinds of gushing waters and definite a kind of semiempirical model, in some sense even can not be referred to as mechanism research; (4) understanding of fracture structure gushing water is that fracture structure is divided into water guide or water proof fracture two big classes in the past, promptly touches as getting working face or during near water conducted zone, gushing water will take place or flood the well accident; Touch or during near the water proof fault zone, any gushing water accident then can not take place, normally digging forward of getting working face as getting working face.
Though comprised in recent years that the applicant's was domestic, outer scholar has recognized the delay gushing water phenomenon of fracture structure, Gu also find the important function of stream-coupling to fault zone gushing water process simulation, but when using this theory, only limit to the fault zone material is assumed to be the elastic-plastic strain-seepage flow coupled simulation under the elastic-plastic material situation and the fault zone material is assumed to be rheology-seepage flow coupled simulation under the rheo-material situation, and cause postponing under the hydrogeological parameter change condition gushing water genesis mechanism and preparation process analysis for considering that ess-strain heavily distributes, the fracture structure hydraulic property changes in time because of the mining operation effect, the rheology of variable element-seepage flow coupled simulation evaluation and rarely have report at home and abroad to postponing the research that the gushing water time carries out prediction.
Summary of the invention
The objective of the invention is to: proposition consideration ess-strain heavily distributes and causes postponing under the hydrogeological parameter change condition analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect.
Further aim of the present invention is: according to the coupling rule of rock mass mechanics parameter and hydraulic parameter, propose the simulation evaluation method of rheology under a kind of variable element condition-seepage flow coupling.
Because the changing of the relative positions of fracture structure, destroyed the integrality in coal measure strata and its water-filling aquifer, in the stratum, formed weak structural plane, along with the pit mining degree of depth increases and the exploitation of group coal down, the abominable geological environment of high-ground stress, high hydraulic pressure, high water temperature manifests gradually, these weak structural planes are under ore deposit pressure and hydraulic pressure associating acting in conjunction, and anti-water proof ability descends gradually, caused postponing the generation of gushing water.At these characteristics, to achieve these goals, the present invention has adopted following technical scheme:
Simulation and forecast evaluation method for delaying water inrush by mine fracture structure comprises:
1, proposition consideration ess-strain heavily distributes and causes postponing under the hydrogeological parameter change condition analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect.
2,, the simulation evaluation method of rheology under a kind of variable element condition-seepage flow coupling is proposed according to the coupling rule of rock mass mechanics parameter and hydraulic parameter.
Described consideration ess-strain heavily distributes and causes postponing under the hydrogeological parameter change condition analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect, be according to water-petrofacies mutual effect theory, analysis under the mining operation disturbance, the origin cause of formation mechanism that the stress of fault zone material, strain, permeance property interact, the cyclic process of influence each other and its hydraulic property transform.Promptly under the mining operation activity disturbance of coal seam, take place heavily to distribute as seat earth protolith stress field, the strain field that stresses re-distribution will inevitably be brought out seat earth takes place heavily to distribute, the variation of strain causes the permeability of seat earth rock stratum and void content to change thereupon, these hydrogeological parameters variations of rock stratum cause the seepage action of ground water field distribution to change, the underground water flow field changes the stress field that causes the seat earth rock stratum at last again and changes, influence circulation so repeatedly, cause the anti-water proof ability of fault zone material of seat earth rock stratum to decline to a great extent, the underground water rising height of growing along fault zone moves on gradually, when the ore deposit of adopting with the coal seam crushes bad band and links, finally caused postponing the generation of hysteresis gushing water.
The simulation evaluation method of the rheology under the described variable element condition-seepage flow coupling, it is coupling rule according to rock mass mechanics parameter and hydraulic parameter, the fault zone material is considered as rheo-material, based on rock mass rheological model under the variable element condition, the stream with variable parameter allergic effect field of force of foundation and seepage field coupling model.
Beneficial effect of the present invention is: solid consider the variable element situation dirty-basis of two fields coupling models on, at the fault zone material property of easy such gushing water of generation, proposed under the hydrogeological parameter change condition to postpone the Simulation evaluation model that rheology-seepage flow is coupled under analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect, the variable element condition.Carry out practical engineering application based on above-mentioned Simulation evaluation model, the result shows that variable element rheology-seepage flow coupling meets engineering reality fully to the explanation that the simulation that postpones the gushing water process reaches the seepage parameters change mechanism.
The specific embodiment
Simulation and forecast evaluation method for delaying water inrush by mine fracture structure comprises:
1, proposition consideration ess-strain heavily distributes and causes postponing under the hydrogeological parameter change condition analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect.
2, the coupling rule of root pick rock mass mechanics parameter and hydraulic parameter proposes the simulation evaluation method that rheology under a kind of variable element condition-seepage flow is coupled.
Described consideration ess-strain heavily distributes and causes postponing under the hydrogeological parameter change condition analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect, be according to water-petrofacies mutual effect theory, analysis under the mining operation disturbance, the origin cause of formation mechanism that the stress of fault zone material, strain, permeance property interact, the cyclic process of influence each other and its hydraulic property transform.
The stress of described fault zone material, strain, permeance property interacts, the origin cause of formation mechanism that Ying Xiang cyclic process each other and its hydraulic property transform, promptly under the mining operation activity disturbance of coal seam, take place heavily to distribute as seat earth protolith stress field, the strain field that stresses re-distribution will inevitably be brought out seat earth takes place heavily to distribute, the variation of strain causes the permeability of seat earth rock stratum and void content to change thereupon, these hydrogeological parameters variations of rock stratum cause the seepage action of ground water field distribution to change, the underground water flow field changes the stress field that causes the seat earth rock stratum at last again and changes, influence circulation so repeatedly, cause the anti-water proof ability of fault zone material of seat earth rock stratum to decline to a great extent, the underground water rising height of growing along fault zone moves on gradually, when the ore deposit of adopting with the coal seam crushes bad band and links, finally caused postponing the generation of hysteresis gushing water.
Rheology under the described variable element condition-seepage flow coupled simulation evaluation method, it is coupling rule according to rock mass mechanics parameter and hydraulic parameter, the fault zone material is considered as rheo-material, based on rock mass rheological model under the variable element condition, the stream with variable parameter allergic effect field of force of foundation and seepage field coupling model.
The described stream with variable parameter allergic effect field of force and seepage field coupling model can be expressed as:
[ K ( σ , P ) ] { H } + { Q } = [ S s ( σ , P ) ] { dH dt } + [ R ] { dσ dt } { σ } = [ D ] [ B ] { U } + { P } K ( σ , P ) = ρ S k σ μ exp [ - a 2 ( σ - P ) ] n ( σ , P ) = n 0 exp [ - a 2 ( σ - P ) ] S s ( σ , P ) = ρg { βn ( σ , P ) + a [ 1 - n ( σ , P ) ] }
In the formula: a 1, a 2It is undetermined coefficient; μ is the fluid dynamic coefficient of viscosity; G is an acceleration of gravity; k 0, n cBe respectively permeability and hole (crack) rate of rock mass when initial stress; K (σ, P), n (σ, P), S s(σ P) is transmission coefficient, porosity and the water storage rate of rock mass under the effective stress effect respectively; { P} is fluid permeability pressure array P=(H-Z) γ; { U} is the displacement array of rock mass; [B] is the geometric matrix of rock mass; [K (σ, P)] for considering the infiltrated matrix of stress effect; [S s(σ, P)] for considering the water storage matrix of stress effect.

Claims (1)

1. simulation and forecast evaluation method for delaying water inrush by mine fracture structure, it is characterized in that: this simulation and forecast evaluation method comprises:
(1) proposition consideration ess-strain heavily distributes and causes postponing under the hydrogeological parameter change condition analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect;
(2), the simulation evaluation method of rheology under a kind of variable element condition-seepage flow coupling is proposed according to the coupling rule of rock mass mechanics parameter and hydraulic parameter;
Described consideration ess-strain heavily distributes and causes postponing under the hydrogeological parameter change condition analytical method that gushing water genesis mechanism and preparation process and fracture structure hydraulic property change in time because of the mining operation effect, be according to water-petrofacies mutual effect theory, analysis under the mining operation disturbance, the origin cause of formation mechanism that the stress of fault zone material, strain, permeance property interact, the cyclic process of influence each other and its hydraulic property transform;
Under the described consideration hydrogeological parameter change condition fault zone material is assumed to be the rheology-seepage flow coupled simulation evaluation method under the rheo-material situation, it is coupling rule according to rock mass mechanics parameter and hydraulic parameter, the fault zone material is considered as rheo-material, based on rock mass rheological model under the variable element condition, the stream with variable parameter allergic effect field of force of foundation and seepage field coupling model;
The stress of described fault zone material, strain, permeance property interacts, the origin cause of formation mechanism that Ying Xiang cyclic process each other and its hydraulic property transform, promptly under the mining operation activity disturbance of coal seam, take place heavily to distribute as seat earth protolith stress field, the strain field that stresses re-distribution will inevitably be brought out seat earth takes place heavily to distribute, the variation of strain causes the permeability of seat earth rock stratum and void content to change thereupon, these hydrogeological parameters variations of rock stratum cause the seepage action of ground water field distribution to change, the underground water flow field changes the stress field that causes the seat earth rock stratum at last again and changes, influence circulation so repeatedly, cause the anti-water proof ability of fault zone material of seat earth rock stratum to decline to a great extent, the underground water rising height of growing along fault zone moves on gradually, when the ore deposit of adopting with the coal seam crushes bad band and links, finally caused postponing the generation of hysteresis gushing water.
CN2010102259949A 2010-07-14 2010-07-14 Simulation and forecast evaluation method for delaying water inrush by mine fracture structure Expired - Fee Related CN101881182B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102259949A CN101881182B (en) 2010-07-14 2010-07-14 Simulation and forecast evaluation method for delaying water inrush by mine fracture structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010102259949A CN101881182B (en) 2010-07-14 2010-07-14 Simulation and forecast evaluation method for delaying water inrush by mine fracture structure

Publications (2)

Publication Number Publication Date
CN101881182A CN101881182A (en) 2010-11-10
CN101881182B true CN101881182B (en) 2011-10-26

Family

ID=43053301

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010102259949A Expired - Fee Related CN101881182B (en) 2010-07-14 2010-07-14 Simulation and forecast evaluation method for delaying water inrush by mine fracture structure

Country Status (1)

Country Link
CN (1) CN101881182B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102608263B (en) * 2012-02-23 2014-11-19 徐德金 Test method for researching fracture water bursting based on coupling of seepage field and stress field
CN103195443B (en) * 2013-04-02 2015-05-06 山东科技大学 Deep mining method capable of optimizing support parameters and preventing roadway delaying water gushing
CN103670511B (en) * 2013-10-19 2015-12-09 煤炭工业济南设计研究院有限公司 A kind of analysis calculation method of roof strata level of breakage
CN104481587B (en) * 2014-11-10 2018-09-14 西安科技大学 The comprehensive coal working face top plate sandstone fissure water of putting of large mining depth, large span visits anti-method
CN106339545B (en) * 2016-08-26 2019-05-10 中国水利水电科学研究院 A kind of rock mass rheology analogy method based on discontinuous deformation analysis
CN107169616B (en) * 2017-07-21 2020-11-13 西安科技大学 Relative entropy prediction method for relative complexity of mine non-mining area structure
CN107740689A (en) * 2017-10-09 2018-02-27 中国矿业大学 A kind of water barrier reproduces exploration assessment method
CN107817317A (en) * 2017-11-06 2018-03-20 四川大学 One kind is by mining influence coal seam bottom water bursting simulation experiment system
CN108052709B (en) * 2017-11-29 2021-07-30 中国神华能源股份有限公司 Method for measuring and calculating water storage coefficient of coal mine underground reservoir
CN108665136A (en) * 2018-02-24 2018-10-16 煤炭工业济南设计研究院有限公司 A kind of analysis calculation method of filling mining effect assessment
CN109063230A (en) * 2018-06-11 2018-12-21 中国矿业大学(北京) Different gushing waters or permeable condition go down into a mine the evaluation method of the process of flooding
CN111738495A (en) * 2020-05-27 2020-10-02 山东大学 Underground engineering water inrush disaster prediction and mutual feedback regulation and control method and system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1802157C (en) * 1990-12-05 1993-03-15 Днепропетровский горный институт им.Артема Method for damping air shock wave in mine workings

Also Published As

Publication number Publication date
CN101881182A (en) 2010-11-10

Similar Documents

Publication Publication Date Title
CN101881182B (en) Simulation and forecast evaluation method for delaying water inrush by mine fracture structure
CN106285782B (en) A kind of bump method for early warning under complicated geological environmental effect and system
Zhang et al. Enhancement of gas drainage efficiency in a special thick coal seam through hydraulic flushing
CN202330181U (en) Hydraulic fracturing device for crack-containing rock-like materials
CN104653226A (en) Stress-gradient-based method for dividing coal impact ground pressure danger area
CN105545294A (en) Shale reservoir high brittleness optimization method
CN105181927A (en) Multi-field coupled low permeability coal seam hydraulic fracturing simulation test method
CN107145684B (en) Underground rock mass engineering ground pressure management and control method
Wu et al. Characteristics of deformation and stress distribution of small coal pillars under leading abutment pressure
Luo et al. Deformation characteristics and reactivation mechanisms of the Outang ancient landslide in the Three Gorges Reservoir, China
Song et al. Theoretical and numerical investigations on mining-induced fault activation and groundwater outburst of coal seam floor
Zhang et al. Strata movement and stress evolution when mining two overlapping panels affected by hard stratum
Hongwei et al. Numerical investigation on the assessment and mitigation of coal bump in an island longwall panel
Yan et al. A new model for predicting surface mining subsidence: the improved lognormal function model
Yuan et al. Movement of overburden stratum and damage evolution of floor stratum during coal mining above aquifers
He et al. Permeability enhancement and gas drainage effect in deep high gassy coal seams via long-distance pressure relief mining: a case study
CN103015996A (en) Method for predicting high steep structure stratum leakage velocity before drilling
CN106596248A (en) Method for determining widths of partition coal pillars at slope based on creep test of coal sample
Linjun et al. Analysis and control on anomaly water inrush in roof of fully-mechanized mining field
Hong-fei et al. A expansive limits anti-permeability strength methodology of the coal mine floor water inrush evaluating
Wang et al. Physical modeling of floor failure above confined water: a case study in China
Jiang et al. Optimization of drainage shaft wall is in complex geological environment
CN102162260B (en) Lateral force application device of similar experimental model
Xu et al. Pressure-relief effect of coal rock body of long distance lower protective seam mined based on FLAC3D
Tian et al. Stability Analysis of Surrounding Rock of Water-Rich Tunnel and Optimization of Blasting Construction Method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111026

Termination date: 20120714