CN108108519A - A kind of filling stope mine pressing reduction characterizing method - Google Patents
A kind of filling stope mine pressing reduction characterizing method Download PDFInfo
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- CN108108519A CN108108519A CN201711212384.3A CN201711212384A CN108108519A CN 108108519 A CN108108519 A CN 108108519A CN 201711212384 A CN201711212384 A CN 201711212384A CN 108108519 A CN108108519 A CN 108108519A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Abstract
The present invention relates to a kind of filling stope mine pressing reduction characterizing methods, show the qualitative characterization of reduction and the problem in science of quantitative expression with ore deposit pressure for filling stope mining influence, it introduces a mobile concept of cutting and carries out qualitative characterization, overlying strata displacement based on open-off cut from different back production positions, advance support stress coefficient of concentration, bearing stress peak value, bearing stress coverage four-index is analyzed, to being shaped as the mobile critical condition for cutting an effect, and then using the mobile quantitative expression cut eye shape state and realize filling stope mine pressing reduction, it is finally based on and mobile cut an effect stope mine pressing is instructed to design, with the given mobile engineer application basis for cutting eye theory, the final realization that filling mining rock stratum position state is promoted to be precisely controlled.
Description
Technical field
The present invention relates to a kind of filling stope mine pressing reduction characterizing methods, belong to coal solid filling production technique field.
Background technology
Solid filling recovery method is controlled in strata movement, surface subsidence control, and " under three " press coal liberation, solid waste
The technical advantage of processing, top plate damage control etc. in selecting as ripe Technology application it is clear that fill one at present
Body and selecting, which are taken out, fills the technologies such as anti-integrated-type coal and gas power phenomenon, and the application boundary of technology, which has also been expanded, extends to deep resource
The Front Scientific Problems in the exploitation of coal resources fields such as exploitation, mine exploration without waster, coal and associated resources safe working.
But for the mechanism of obturation reduction stope mining influence, the qualitative characterization for especially weakening state, Weakening degree
Quantitative expression, the critical reasonable definition of weakened treatment etc. and how the mechanism of scientific utilization obturation reduction mining influence,
Filling stope mine pressing control is carried out, at present still without the design method of complete set.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of filling stope mine pressing reduction characterizing method, can be directed to and fill
It fills out stope mine pressing reduction and realizes qualitative characterization, and realize the reasonable definition of weakened treatment critical condition, improve filling stope mine pressing
The application efficiency of reduction.
In order to solve the above-mentioned technical problem the present invention uses following technical scheme：The present invention devises a kind of filling stope ore deposit
Pressure reduction characterizing method, includes the following steps：
Step A. fills the geological conditions and Con trolling index of stope according to target, determines enriching for target filling stope
Rate, subsequently into step B；
Step B. fills the filling coal mining working face engineering geological condition information of stope and the object of coal and rock according to target
Mechanics parameter is managed, using finite element method, structure target fills stope mining influence finite element analysis model, subsequently into
Step C；
Step C. builds filling side for the Full Ratio of target filling stope, working face size, exploitation space and mining height
Case, and enter step D；
Step D. fills stope mining influence finite element analysis model using target, and target filling is carried out for charging formula
Stope mining process simulation inverting, subsequently into step E；
Step E. fills stope mining process simulation inverting according to target, and the overlying strata displacement of extraction target filling stope refers to
Mark, advance support stress coefficient of concentration index, bearing stress peak index, bearing stress coverage index, and enter step
F；
Step F. obtains four indexs according to step E, and analysis obtains target filling stope filling weakization mining influence effect
Answer degree.
As a preferred technical solution of the present invention：It is as follows to further include step G, after having performed the step F, enters
Step G；
Step G. judgements obtain the obturation reduction mining influence effect degree of target filling stope, if reach default and fill
Weakization mining influence critical effect degree is filled out, is to represent that the charging formula meets default filling requirement, ending method；Otherwise
It represents that the charging formula is unsatisfactory for default filling requirement, and enters step H；
Step H. is adjusted for the Full Ratio of target filling stope, working face size, exploitation space and each data of mining height
It is whole, update charging formula, and return to step D.
As a preferred technical solution of the present invention：In the step G, the default obturation reduction mining influence faces
Boundary's effect degree is defined as movement and cuts eye shape state, is specially：Maximum overlying strata displacement point, bearing stress peak point are with working face
It moves forward and gradually moves forward, and while working face extraction distance increase, sinking degree remains unchanged；And working face Forward is same
When, the factor of stress concentration for filling stope remains unchanged, and the factor of stress concentration for filling stope is maintained at default value scope
It is interior.
As a preferred technical solution of the present invention：The default obturation reduction mining influence critical effect degree
In, while working face moves forward, the factor of stress concentration for filling stope remains unchanged, and the factor of stress concentration for filling stope is protected
It holds between 1.1~1.3.
A kind of application system for filling stope mine pressing reduction characterizing method of the present invention, using above technical scheme and now
There is technology to compare, there is following technique effect：The present invention relates to a kind of filling stope mine pressing reduction characterizing method, using completely newly setting
Meter method shows the qualitative characterization of reduction and the problem in science of quantitative expression with ore deposit pressure for filling stope mining influence, introduces
A mobile concept of cutting carries out qualitative characterization；Based on overlying strata displacement of the open-off cut from different back production positions, advance support stress concentration
Coefficient, bearing stress peak value, the analysis of bearing stress coverage four-index, to being shaped as the mobile critical condition for cutting an effect,
And then the quantitative expression of eye shape state realization filling stope mine pressing reduction is cut using movement, it is finally based on a mobile effect of cutting and instructs to adopt
Field ore deposit pressure design, it is basic with the given mobile engineer application for cutting eye theory, it is final that filling mining rock stratum position state is promoted to be precisely controlled
Realization.
Description of the drawings
Fig. 1 is the flow diagram of present invention filling stope mine pressing reduction characterizing method；
Fig. 2 is specific embodiment of the invention solid filling coal mining geological conditions；
Fig. 3 solid filling coal mining mathematical calculation models of the present invention；
Fig. 4 is the distribution of the bearing stress of face surrounding rock under caving method mining conditions；
Fig. 5 be cut and fill of the present invention under the conditions of face surrounding rock bearing stress distribution；
Fig. 6 is bearing stress state at the different position of caving method working face central axes direction；
Fig. 7 is bearing stress state at the different position of filling method working face central axes direction of the present invention；
Fig. 8 directly pushes up sinking comparison for filling method of the present invention and caving method；
Fig. 9 is without directly top sinks to comparing under filling operation；
Figure 10 is the mobile stress distribution displaying figure for cutting eye shape state of the present invention.
Specific embodiment
The specific embodiment of the present invention is described in further detail with reference to Figure of description.
As shown in Figure 1, the present invention devises a kind of filling stope mine pressing reduction characterizing method, in practical application, for pre-
It if obturation weakens mining influence critical effect degree, is defined as movement and cuts eye shape state, as shown in Figure 10, be specially：Maximum is covered
Rock displacement point, bearing stress peak point gradually move forward with the Forward of working face, and while working face extraction distance increase, under
Heavy degree remains unchanged；And while working face Forward, the factor of stress concentration for filling stope remains unchanged, and fill stope
The factor of stress concentration be maintained between 1.1~1.3, ore deposit pressure reduction characterizing method, solid sold stowing coal working face
In exploitation process, dense pack body, which significantly slows ore deposit pressure, to be shown, and causes to weaken mining influence, to stope when being formed with open-off cut
Mining influence effect is basically identical, i.e. the mining influence in filling operation face is weakened the state that an effect is cut for movement, and definition does not have
There is apparent periodic weighting, as movement cut the critical of eye shape state without filling stope that notable ore deposit pressure shows, if filling stope
Mining influence reaches this critical condition, i.e., cuts a state representation filling stope mine pressing reduction phenomenon with mobile.It is real in practical application
It applies among process, specifically comprises the following steps：
Step A. fills the geological conditions and Con trolling index of stope according to target, determines enriching for target filling stope
Rate, subsequently into step B.
Step B. fills the filling coal mining working face engineering geological condition information of stope and the object of coal and rock according to target
Mechanics parameter is managed, using finite element method, structure target filling stope mining influence finite element analysis model, such as Fig. 3 institutes
Show, subsequently into step C.
Step C. builds filling side for the Full Ratio of target filling stope, working face size, exploitation space and mining height
Case, and enter step D.
Step D. fills stope mining influence finite element analysis model using target, and target filling is carried out for charging formula
Stope mining process simulation inverting, subsequently into step E.
Step E. fills stope mining process simulation inverting according to target, and the overlying strata displacement of extraction target filling stope refers to
Mark, advance support stress coefficient of concentration index, bearing stress peak index, bearing stress coverage index, and enter step
F。
Step F. obtains four indexs according to step E, and analysis obtains target filling stope filling weakization mining influence effect
Degree is answered, subsequently into step G.
Step G. judgements obtain the obturation reduction mining influence effect degree of target filling stope, if reach movement and cut
Eye shape state is to represent that the charging formula meets default filling requirement, ending method；Otherwise it is pre- to represent that the charging formula is unsatisfactory for
If filling requirement, and enter step H.
Step H. is adjusted for the Full Ratio of target filling stope, working face size, exploitation space and each data of mining height
It is whole, update charging formula, and return to step D.
A kind of filling stope mine pressing reduction characterizing method designed by above-mentioned technical proposal, using brand-new design method, for
Filling stope mining influence shows qualitative characterization's problem in science of reduction with ore deposit pressure, introduces a mobile concept of cutting and carries out qualitative table
Sign；Overlying strata displacement, advance support stress coefficient of concentration, bearing stress peak value, supporting based on open-off cut from different back production positions
Influence range of stress four-index is analyzed, and is cut the critical condition of an effect to movement is shaped as, and then is cut eye shape state reality using mobile
Now fill the quantitative expression of stope mine pressing reduction, be finally based on it is mobile cut an effect stope mine pressing instructed to design, with given movement
Cut the engineer application basis of eye theory, the final realization that filling mining rock stratum position state is promoted to be precisely controlled.
Using certain ore deposit 7203W working faces as specific embodiment, 7203W working faces coal seam block diagram as shown in Figure 2, using this
The designed filling stope mine pressing reduction characterizing method of invention, it is specific as follows：
Step A. fills the geological conditions and Con trolling index of stope according to target, determines enriching for target filling stope
Rate, subsequently into step B.
Step B. fills the filling coal mining working face engineering geological condition information of stope and the object of coal and rock according to target
Mechanics parameter is managed, using finite element method, structure target fills stope mining influence finite element analysis model, subsequently into
Step C.
Based on above-mentioned steps A to step B, i.e., the rock tested according to the rock stratum block diagram of 7203W working faces and laboratory
Mechanics parameter establishes solid filling coal mining finite element numerical computation model, as shown in Figure 3 using ABAQUS numerical simulation softwares；
A height of 300m × the 190m of model length and width × 189.7m adds boundary constraint, and respectively stays 50m protection coal pillars in surrounding.Realistic simulation
Face length is 90m, and propulsion length is 200m, excavates and stowing interval is 8.0m, amounts to 25 steps and excavates and fill.
Step C. builds filling side for the Full Ratio of target filling stope, working face size, exploitation space and mining height
Case, and enter step D.
Step D. fills stope mining influence finite element analysis model using target, and target filling is carried out for charging formula
Stope mining process simulation inverting, subsequently into step E.
Based on above-mentioned steps C to step D, quantitatively to study stope stress and overlying strata position under the conditions of filling method, caving method
The changing rule with working face extraction is moved, the parameter specifically set is as follows：Obturation elastic foundation coefficient is 0.0 × 106Nm-3、4.0×106N·m-3、10.0×106N·m-3、16.0×106N·m-3, caving method exploitation is equivalent to respectively and difference is enriched
The filling mining of rate, stent frame type are six pillar filling coal mining hydraulic supports；Monitoring index include overlying strata deflection, obturation and
Coal petrography body stress designs 4 analytical plans, is specifically shown in Table 1 altogether.
Table 1
Step E. fills stope mining process simulation inverting, extraction target filling stope as shown in Figure 5, Figure 6, according to target
Overlying strata drift index, advance support stress coefficient of concentration index, bearing stress peak index, bearing stress coverage refer to
Mark, and enter step F.
Step F. obtains four indexs according to step E, and analysis obtains target filling stope filling weakization mining influence effect
Degree is answered, subsequently into step G.
As shown in figure 4, apparent bearing stress area is formed at working face extraction initial stage around caving method working face stope,
Working face mining initial stage and during being advanced to 96m, peak stress increases to 46Mpa by 32Mpa, is changed significantly；Filling method
Do not form in working face extraction initial stage and follow-up exploitation process detailed bearing stress area around working face stope, and not with
The propulsion of working face and significant changes, working face mining initial stage and during being advanced to 96m, peak stress only by
17.0Mpa increases to 18.0Mpa, and variation is not obvious.Obturation weakens the effect degree of mining influence.
Step G. judgements obtain the obturation reduction mining influence effect degree of target filling stope, if reach movement and cut
Eye shape state is to represent that the charging formula meets default filling requirement, ending method；Otherwise it is pre- to represent that the charging formula is unsatisfactory for
If filling requirement, and enter step H.
Wherein, the obturation reduction mining influence effect degree of obtained target filling stope is judged, if reach movement and cut
Eye shape state, as shown in Fig. 6, Fig. 7, Fig. 8, Fig. 9：
A. exploited for caving method, with the propulsion of working face, the factor of stress concentration in coal wall becomes larger, and works as work
Face is advanced into 32,48,96,152,200m when, stress in coal bed coefficient of concentration is respectively：2.08th, 2.44,2.81,2.97,2.60,
And coefficient of concentration is between 2.0~3.0.The displacement directly pushed up is respectively：500.00mm、956.37mm、1526.07mm、
1920.39mm、2128.53mm.Under conditions of illustrating caving method processing goaf, the apparent stress field of stope stress concentration degree becomes
Change acutely, directly top sinks huge, notable to the extent of the destruction of protolith.
B. for cut and fill, with the propulsion of working face, the factor of stress concentration in coal wall is basically unchanged, and works as work
Face is advanced into 32,48,96,152,200m when, stress in coal bed coefficient of concentration is respectively：1.07th, 1.09,1.11,1.11,1.09,
It is basically unchanged, concentrates on 1.1 or so.Illustrate that goaf is filled under conditions of body dense pack, solid filling coal working face
Stress concentration degree is weak in exploitation process, change of stress field very little namely small to the extent of the destruction of initial rock stress field.Directly push up
Displacement is respectively：213.38mm、234.36mm、265.63mm、281.54mm、288.78mm.Moreover, different Full Ratio conditions
Under, the sinking peak value that directly pushes up difference, but whole keep smaller range fluctuation.
Step H. is adjusted for the Full Ratio of target filling stope, working face size, exploitation space and each data of mining height
It is whole, update charging formula, and return to step D.
The mobile Full Ratio cut corresponding to eye shape state is at least among actual application process, under the embodiment geological conditions
Reach 82%.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode, within the knowledge of a person skilled in the art, can also be on the premise of present inventive concept not be departed from
Make various variations.
Claims (4)
1. a kind of filling stope mine pressing reduction characterizing method, which is characterized in that include the following steps：
Step A. fills the geological conditions and Con trolling index of stope according to target, determines the Full Ratio of target filling stope, so
After enter step B；
Step B. fills the filling coal mining working face engineering geological condition information of stope and the physical force of coal and rock according to target
Parameter is learned, using finite element method, structure target filling stope mining influence finite element analysis model, subsequently into step
C；
Step C. fills Full Ratio, working face size, exploitation space and the mining height of stope for target, builds charging formula, and
Enter step D；
Step D. fills stope mining influence finite element analysis model using target, and target filling stope is carried out for charging formula
Exploitation process simulating inversion method, subsequently into step E；
Step E. fills stope mining process simulation inverting according to target, and the overlying strata drift index of extraction target filling stope surpasses
Front support factor of stress concentration index, bearing stress peak index, bearing stress coverage index, and enter step F；
Step F. obtains four indexs according to step E, and analysis obtains target filling stope filling weakization mining influence effect journey
Degree.
2. a kind of filling stope mine pressing reduction characterizing method according to claim 1, which is characterized in that further include step G such as
Under, after having performed the step F, enter step G；
Step G. judgements obtain the obturation reduction mining influence effect degree of target filling stope, if reach default obturation
Mining influence critical effect degree is weakened, is to represent that the charging formula meets default filling requirement, ending method；Otherwise represent
The charging formula is unsatisfactory for default filling requirement, and enters step H；
Step H. is adjusted for the Full Ratio of target filling stope, working face size, exploitation space and each data of mining height, more
New charging formula, and return to step D.
3. a kind of filling stope mine pressing reduction characterizing method according to any one in claim 1 to 2, it is characterised in that：
In the step G, the default obturation reduction mining influence critical effect degree is defined as movement and cuts eye shape state, is specially：
Maximum overlying strata displacement point, bearing stress peak point gradually move forward with the Forward of working face, and working face extraction is apart from increased
Meanwhile sinking degree remains unchanged；And while working face Forward, the factor of stress concentration for filling stope remains unchanged, and
The factor of stress concentration of filling stope is maintained in the range of default value.
4. a kind of filling stope mine pressing reduction characterizing method according to any one in claim 3, it is characterised in that：It is described
In default obturation reduction mining influence critical effect degree, while working face moves forward, the factor of stress concentration of stope is filled
It remains unchanged, and the factor of stress concentration for filling stope is maintained between 1.1~1.3.
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| CN201711212384.3A CN108108519B (en) | 2017-11-28 | 2017-11-28 | Filling stope mine pressure weakening characterization method |
| PCT/CN2018/113604 WO2019105177A1 (en) | 2017-11-28 | 2018-11-02 | Filling stope mine pressure weakening characterization method |
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Cited By (2)
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| WO2019105177A1 (en) * | 2017-11-28 | 2019-06-06 | 中国矿业大学 | Filling stope mine pressure weakening characterization method |
| CN109977453A (en) * | 2019-01-15 | 2019-07-05 | 河北工程大学 | Solid packed hydraulic support working resistance design method |
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| CN103758519A (en) * | 2013-12-27 | 2014-04-30 | 金川集团股份有限公司 | Thick and large mineral deposit stage subsequent filling method mining piecewise optimization design and implementation method |
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| CN109977453A (en) * | 2019-01-15 | 2019-07-05 | 河北工程大学 | Solid packed hydraulic support working resistance design method |
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| CN108108519B (en) | 2020-07-10 |
| WO2019105177A1 (en) | 2019-06-06 |
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