CN105698853B - The detection method of country rock Effect of Bolt-grouting Support during a kind of working face extraction - Google Patents
The detection method of country rock Effect of Bolt-grouting Support during a kind of working face extraction Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 98
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- 238000000605 extraction Methods 0.000 title claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 38
- 238000004458 analytical method Methods 0.000 claims abstract description 20
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- 238000009659 non-destructive testing Methods 0.000 description 1
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- 238000007569 slipcasting Methods 0.000 description 1
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Abstract
The present invention relates to a kind of detection method of country rock Effect of Bolt-grouting Support during working face extraction, comprise the following steps：Select two working faces, non- bolt-grouting support and bolt-grouting support are taken respectively in two tunnels where two working faces, the Stope Abutment Pressure situation in two tunnels is detected using micro seismic monitoring instrument, and determines the advance support equivalent distances and surrounding rock failure equivalent distances in two tunnels respectively；Utilize the equivalent utilization rate of support unit of nondestructive detecting instrument, respectively two tunnels of acquisition；The average maximum convergence displacement of the country rock of respective regions under the different adjoining rock stability state of collection statistics；It is determined that the Parameter analysis value of effect is noted in reflection bolt-grouting support tunnel relative to non-anchor note supported laneway anchor accordingly；Parameter analysis value is utilized into weight analysis method, anchor note effect comprehensive and quantitative Testing index is established, effect is noted according to the anchor detected, instructs live anchor note work.
Description
Technical field
The present invention relates to a kind of detection method, and country rock anchor is noted during being based particularly on a kind of working face extraction of micro seismic monitoring
The detection method of supporting effect.
Background technology
After deep mining is entered, the various soft-rock tunnels such as high stress, dilatancy largely occur, and give roadway support band in colliery
Carry out extreme difficulty, have a strong impact on safety in production.Bolting and grouting support can improve the integrality and intensity of country rock, effectively control soft
Rock roadway deformation.
Currently the detection on Effect of Bolt-grouting Support is single factor test mostly and is qualitative detection, mainly using borehole television, brill
The means such as hole coring, comprehensive, quantitative country rock Effect of Bolt-grouting Support can not be detected, while related personnel is to bolt-grouting support
During detection is concentrated mainly on tunnelling phase i.e. static pressure, lack analysis detection under the conditions of working face extraction to bolt-grouting support.
Due to microseism technology, precision is high in terms of rock masses fracturing energy measuring, it is not necessary to artificial destruction is carried out to rock mass,
More and more it is applied to the fields such as rock burst, Prediction of Rock Burst in recent years, but is had no in Effect of Bolt-grouting Support detection
Relevant report.Using On Microseismic Monitoring Technique, gather and handle rock masses fracturing energy during working face extraction, in combination with lossless
The means such as detection, displacement convergence, more comprehensive, scientifical reasonably can be detected to country rock Effect of Bolt-grouting Support.
Traditional detection method to country rock Effect of Bolt-grouting Support during working face extraction has the disadvantages that：
1st, need to carry out the secondary artificial destruction such as drill to rock mass, add the disturbance to rock mass and destroy；
2nd, need to be aided with the anchor note mass effect that laboratory test just can determine that engineering, measure cycle length, process is cumbersome, influences
Construction speed.
The content of the invention
A kind of the present invention is intended to provide multifactor, quantitative country rock Effect of Bolt-grouting Support detection method.By introducing microseism
Monitoring technology, rock masses fracturing Energy distribution situation is obtained in real time, with reference to means such as Non-Destructive Testings, it is established that working face extraction condition
Lower country rock Effect of Bolt-grouting Support Testing index, the blank of country rock bolt-grouting support context of detection during working face extraction is filled up.
To achieve the above object, the present invention adopts the following technical scheme that：
The detection method of country rock Effect of Bolt-grouting Support during a kind of working face extraction, it comprises the following steps：
Step 1：Two working faces are selected, in two tunnels where two working faces, take non-anchor note respectively
Supporting and bolt-grouting support, the Stope Abutment Pressure situation in two tunnels is detected using micro seismic monitoring instrument, and determine two respectively
The advance support equivalent distances and surrounding rock failure equivalent distances in individual tunnel；
Step 2：Utilize the equivalent utilization rate of support unit of nondestructive detecting instrument, respectively two tunnels of acquisition；
Step 3：The average maximum convergence displacement of the country rock of respective regions under the different adjoining rock stability state of collection statistics；
Step 4：The advance support equivalent distances, the country rock based on non-anchor note supported laneway and bolt-grouting support tunnel
The average maximum convergence displacement of equivalent distances, the equivalent utilization rate of the support unit, the country rock is destroyed, it is determined that corresponding reflection
The Parameter analysis value of effect is noted relative to non-anchor note supported laneway anchor in bolt-grouting support tunnel；
Step 5：The Parameter analysis value is utilized into weight analysis method, establishes anchor note effect comprehensive and quantitative Testing index, root
Effect is noted according to the anchor detected, instructs live anchor note work.
In the step 1, the geological conditions of selected two working faces approaches.
In the step 1, the determination method of the advance support equivalent distances is：Utilize the micro seismic monitoring instrument, root
According to microseism Energy distribution situation, determine Stope Abutment Pressure dramatic impact area in exploitation process, significantly affect area and the zone of influence, institute
Dramatic impact area, area, the zone of influence of significantly affecting is stated each to put down along the weighting of the horizontal length in advance of the face direction
Average, as described advance support equivalent distances.
The dramatic impact area be working face to the region of rock masses fracturing energy peak location, it is described to significantly affect Qu Weiyan
Body energy of rupture peak to rock masses fracturing energy is 103J region, the zone of influence are rock masses fracturing energy 103~0J's
Region.
In the step 1, the determination method of the surrounding rock failure equivalent distances is：Utilize the micro seismic monitoring instrument, root
According to microseism Energy distribution situation, the heavy damage scope of country rock is determined, moderate damage scope, general damage envelope is described serious
Damage envelope, the moderate damage scope, the general respective border highest distance position of damage envelope to drift section border away from
From weighted average, as described surrounding rock failure equivalent distances.
Rock masses fracturing energy is more than 105J regions are heavy damage scope, rock masses fracturing energy 105~102J regions are medium
Damage envelope, rock masses fracturing energy 102~0J regions are general damage envelope.
In the step 2, the determination method of the equivalent utilization rate of support unit is：Using the nondestructive detecting instrument,
Obtain respectively the support unit in the dramatic impact area of Stope Abutment Pressure, described significantly affect area and the zone of influence
Load average value, the dramatic impact area load average value, the load for significantly affecting area of the support unit are averaged
It is worth, the weighted average of the load average value three of the zone of influence, the ratio with the yield strength of the support unit, is
The equivalent utilization rate of support unit.
In the step 2, the support unit includes anchor pole and/or anchor cable.
In the step 3, respective regions include the play of Stope Abutment Pressure under the different adjoining rock stability state
The strong zone of influence, described significantly affect area and the zone of influence.
By laying some surface displacement convergence monitoring sections in the respective regions, measure at where each monitoring section
The maximum convergence displacement of country rock, the maximum convergence displacement is that roof and floor, two help displacement variable when the roadway surrounding rock is stable
Sum, the average maximum convergence displacement of the country rock are measured each maximum convergence displacement under same adjoining rock stability state
Average value.
In the step 4, the Parameter analysis value includes advance support slip, surrounding rock failure slip, component and utilized
Increase rate, displacement convergence slip；
The advance support slip is：The advance support equivalent distances of the non-anchor note supported laneway and the anchor
The difference of the advance support equivalent distances of supported laneway is noted, the ratio with the advance support equivalent distances of the non-anchor note supported laneway
Value；
The rock mass damage slip is：The non-anchor note supported laneway and the country rock in the bolt-grouting support tunnel are broken
The difference of bad equivalent distances, the ratio with the surrounding rock failure equivalent distances of the non-anchor note supported laneway；
The component is using increase rate：The equivalent utilization rate of the support unit in the bolt-grouting support tunnel with it is described non-
The difference of the equivalent utilization rate of the support unit in bolt-grouting support tunnel, with the support unit in the bolt-grouting support tunnel etc.
Imitate the ratio of utilization rate；
The displacement restrains slip：Its
In, eiFor coefficient correlation, i=1,2,3, and Σ ei=1, non-anchor note supported laneway, bolt-grouting support tunnel dramatic impact area it is flat
Equal maximum restrains displacementThe average maximum convergence displacement for significantly affecting area is respectivelyThe zone of influence is averaged
Maximum restrains displacement
In the step 5, the anchor notes effect comprehensive and quantitative Testing index, is the weighted average of each Parameter analysis value
Value.
The beneficial effects of the invention are as follows：
(1) On Microseismic Monitoring Technique is incorporated into Effect of Bolt-grouting Support detection by the present invention first, is avoided artificially to scene
The destruction of rock mass, rock masses fracturing energy signal distribution situation, method more advance and novelty can be obtained in real time.
(2) the invention belongs to multifactor quantitative detecting method, the shortcomings that overcoming single factor test, qualitative detection etc., make
It is reasonable to obtain detection method more overall scientific.
(3) present invention has filled up the blank of country rock bolt-grouting support context of detection during working face extraction, perfect anchor note branch
Protect detection architecture.
(4) present invention need not carry out laboratory test, the anchor note effect of the i.e. detectable engineering in scene, and then instruct anchor note to apply
Work, it is effective stronger, be advantageous to improve construction speed.
Brief description of the drawings
Fig. 1 is the quantitative overhaul flow chart of country rock Effect of Bolt-grouting Support of the present invention.
Fig. 2 is rock mass microseism energy acquisition schematic flow sheet of the present invention.
Fig. 3 is the leading infection scope schematic diagram that the present invention is determined based on rock mass Energy distribution.
Fig. 4 is the surrounding rock failure scope schematic diagram that the present invention is determined based on rock mass Energy distribution.
Fig. 5 is support unit distribution of force schematic diagram in the range of leading infection of the present invention.
Fig. 6 is country rock convergence statistics schematic diagram in the range of leading infection of the present invention.
Wherein：R1For advance support slip, R2For surrounding rock failure slip, R3Raising is utilized for anchor pole in support unit
Rate, R4Increase rate, R are utilized for support unit stream line5Slip is restrained for displacement, R is overall target, R0For Testing index.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
The detection method of country rock Effect of Bolt-grouting Support during a kind of working face extraction, it comprises the following steps：
Step 1, the close working face of two geological conditions is selected, first job face tunnel uses non-bolt-grouting support, remembers
For M1, second uses bolt-grouting support, is designated as M2, micro seismic monitoring instrument is installed in two working faces respectively, in exploitation process
It is acquired away from country rock microseismic event energy under the conditions of working face different distance, according to microseismic event Energy distribution situation, it is determined that
Stope Abutment Pressure dramatic impact area in exploitation process, hence it is evident that the zone of influence and zone of influence scope, calculate advance support equivalent distances；
Country rock heavy damage scope is determined simultaneously, moderate damage scope, general damage envelope, calculates surrounding rock failure equivalent distances；
Step 2, using nondestructive detecting instrument, to M1, M2 Stope Abutment Pressure dramatic impact area, hence it is evident that the zone of influence and shadow
Ring and large-scale common bolt (rope), the detection of grouted anchor bar (rope) work load are carried out in the range of area, count general in different range
Logical anchor pole (rope), grouted anchor bar (rope) work load average value, calculate common bolt (rope), grouted anchor bar (rope) in different range
The equivalent utilization rate of support unit；
Step 3, in M1, M2 Stope Abutment Pressure dramatic impact area, hence it is evident that laid in the range of the zone of influence and the zone of influence some
Surface displacement convergence monitoring section, count away from the average maximum convergence displacement of country rock under the conditions of working face different distance；
Step 4, Effect of Bolt-grouting Support analysis：Based on advance support equivalent distances, surrounding rock failure equivalent distances, common anchor
The average maximum convergence displacement of bar (rope), grouted anchor bar (rope) support unit utilization rate, different range country rock, is calculated super respectively
Preceding supporting slip, surrounding rock failure slip, component utilize increase rate, displacement convergence slip；
Step 5, Effect of Bolt-grouting Support detection：The parameter increase rate obtained based on step 4, using weight analysis method, is built
Vertical Effect of Bolt-grouting Support Testing index, using live Effect of Bolt-grouting Support detected value as standard, is quantified to Effect of Bolt-grouting Support
Detection.
In step 1, the micro seismic monitoring instrument, by mobile probe, specifies microseismic event energy with removable probe
Distribution situation, determine horizontal length of the Stope Abutment Pressure dramatic impact area along advance of the face direction in M1, M2 exploitation process
RespectivelyThe horizontal length for significantly affecting area is respectivelyThe horizontal length of the zone of influence is respectively
M1, M2 advance support equivalent distances, which are calculated, is respectivelyEnclose
Rock heavy damage range boundary highest distance position to drift section frontier distance is respectivelyModerate damage range boundary is most
Distant positions to drift section frontier distance is respectivelyGeneral damage envelope border highest distance position is to drift section border
Distance is respectivelyM1, M2 surrounding rock failure equivalent distances, which are calculated, is respectively Wherein,Respectively coefficient correlation, i=1,2, j=1,2,3, and
In step 2, common bolt, anchor cable work load average value in the different range, it is in M1 dramatic impacts area Significantly affecting area isThe zone of influence isThe equivalent utilization rate of common bolt can use formula table
It is shown asThe equivalent utilization rate of anchor cable isDifferent range
Internal grouting blot, grouting cable anchor work load average value are in M2 dramatic impacts areaSignificantly affecting area isThe zone of influence isThe equivalent utilization rate of grouted anchor bar isSlip casting anchor
The equivalent utilization rate of rope isWherein,Respectively coefficient correlation, i=1,2, j
=1,2,3,E1For common bolt
Yield limit, F1For anchor cable yield limit, E2For grouted anchor bar yield limit, F2For grouting cable anchor yield limit.
In step 3, the average maximum convergence displacement of country rock under the conditions of the different distance away from working face, in the violent shadow of M1, M2
Ringing area is respectivelySignificantly affecting area is respectivelyThe zone of influence is respectively
In step 4, the advance support slip is R1=(L1-L2)/L1；Surrounding rock failure slip is R2=(D1-
D2)/D1；Component is R using increase rate3=(G2-G1)/G2, R4=(H2-H1)/H2；Displacement restrains slipWherein, eiFor coefficient correlation, i=1,2,3, and Σ ei
=1.
In step 5, the Effect of Bolt-grouting Support Testing index, obtained using weight analysis method, i.e. R=Σ KiRi, i
=1~5, wherein KiFor distribution coefficient, the proportion of Main Basiss relevant parameter is allocated, and Σ Ki=1.
Embodiment 1：
The present invention's concretely comprises the following steps：
The first step, data acquisition.
A, the close working face of two geological conditions is selected, first job face tunnel uses non-bolt-grouting support, is designated as M1,
Second uses bolt-grouting support, is designated as M2.As shown in Fig. 2 installing micro seismic monitoring instrument in working face, pass through movable signal acquisition
Probe is acquired to country rock microseismic event energy under the conditions of exploitation process middle-range working face different distance.Such as Fig. 3, shown in Fig. 4,
According to microseismic event Energy distribution situation, determine that Stope Abutment Pressure dramatic impact area is respectively in M1, M2 exploitation processSignificantly affecting area is respectivelyIt is respectively with the zone of influenceDetermine country rock heavy damage range boundary
Highest distance position to drift section frontier distance is respectivelyModerate damage range boundary highest distance position is to drift section side
Boundary's distance is respectivelyGeneral damage envelope border highest distance position to drift section frontier distance is respectively
B, as shown in figure 5, using nondestructive detecting instrument, to M1, M2 Stope Abutment Pressure dramatic impact area, hence it is evident that the zone of influence
With carried out in the range of the zone of influence large-scale common bolt (rope), grouted anchor bar (rope) work load detection, statistics common bolt,
Anchor cable work load average value, it is in M1 dramatic impacts areaSignificantly affecting area isThe zone of influence isGrouted anchor bar, grouting cable anchor work load average value are in M2 dramatic impacts areaSignificantly affecting area isThe zone of influence is
C, in M1, M2 Stope Abutment Pressure dramatic impact area, hence it is evident that lay some surfaces in the range of the zone of influence and the zone of influence
Displacement convergence monitoring section, as shown in fig. 6, the average maximum convergence displacement of statistics country rock is respectively in M1, M2 dramatic impact areaSignificantly affecting area is respectivelyThe zone of influence is respectively
Second step, data processing.
D, the data obtained according to the above-mentioned first step, M1 and M2 advance support equivalent distances are calculated, is respectivelyM1 and M2 surrounding rock failure equivalent distances, it is respectivelyWherein,Respectively coefficient correlation, i=1,2, j
=1,2,3, and
E, the data obtained according to the first step, calculating the equivalent utilization rate of common bolt is
The equivalent utilization rate of anchor cable isThe equivalent utilization rate of grouted anchor bar isThe equivalent utilization rate of grouting cable anchor isWherein,Respectively coefficient correlation, i=1,2, j=1,2,3, E1For common bolt yield limit, F1For anchor cable yield limit, E2For grouted anchor bar yield limit, F2For
Grouting cable anchor yield limit.
3rd step, effect analysis.
The data obtained according to second step, it is R to calculate advance support slip1=(L1-L2)/L1；Surrounding rock failure is reduced
Rate is R2=(D1-D2)/D1；Component is R using increase rate3=(G2-G1)/G2, R4=(H2-H1)/H2；Displacement restrains slipWherein, eiFor coefficient correlation, i=1,2,3, and Σ ei
=1.
4th step, quantitative detection.
Finishing analysis according to the 3rd step to data, using weight analysis method, Effect of Bolt-grouting Support Testing index is established, i.e.,
R=Σ KiRi, i=1~5, wherein KiFor distribution coefficient, the proportion of Main Basiss relevant parameter is allocated, and Σ Ki=1.With
Live Effect of Bolt-grouting Support detected value is standard, and quantitative detection is carried out to Effect of Bolt-grouting Support.
Embodiment 2：
Another determination methods of advance support equivalent distances is dramatic impact area, significantly affects area, the zone of influence each
Position is put to the weighted average of the distance of excavation face.
Another determination method of surrounding rock failure equivalent distances is：Obtain respectively along drift section border top plate, bottom plate, a left side
The right side two help etc. exemplary position to heavy damage scope, moderate damage scope, general damage envelope border average distance, then to institute
The heavy damage scope stated, moderate damage scope, the average distance of general damage envelope are weighted average, are described enclose
Rock destroys equivalent distances.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to embodiment will be apparent for those skilled in the art, as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention, is not described in detail
Part, be prior art, herein without repeating.Therefore, the present invention is not intended to be limited to these implementations shown in this article
Example, and it is to fit to the most wide scope consistent with principles disclosed herein and feature.
Claims (5)
1. the detection method of country rock Effect of Bolt-grouting Support during a kind of working face extraction, it is characterised in that comprise the following steps：
Step 1：Two working faces are selected, in two tunnels where two working faces, take non-bolt-grouting support respectively
And bolt-grouting support, the Stope Abutment Pressure situation in two tunnels is detected using micro seismic monitoring instrument, and determine two lanes respectively
The advance support equivalent distances and surrounding rock failure equivalent distances in road；
Step 2：Utilize the equivalent utilization rate of support unit of nondestructive detecting instrument, respectively two tunnels of acquisition；
Step 3：The average maximum convergence displacement of the country rock of respective regions under the different adjoining rock stability state of collection statistics；
Step 4：The advance support equivalent distances, the surrounding rock failure based on non-anchor note supported laneway and bolt-grouting support tunnel
The average maximum convergence displacement of equivalent distances, the equivalent utilization rate of the support unit, the country rock, it is determined that reflection anchor note branch accordingly
Protect Parameter analysis value of the tunnel relative to non-anchor note supported laneway anchor note effect；
Step 5：The Parameter analysis value is utilized into weight analysis method, anchor note effect comprehensive and quantitative Testing index is established, according to institute
The anchor note effect of detection, instructs live anchor note work；
In the step 1, the determination method of the advance support equivalent distances is：Using the micro seismic monitoring instrument, according to micro-
Energy distribution situation is shaken, Stope Abutment Pressure dramatic impact area in exploitation process is determined, significantly affects area and the zone of influence, the play
The strong zone of influence, it is described significantly affect area, the zone of influence each along advance of the face direction horizontal length weighted average,
As described advance support equivalent distances；
In the step 1, the determination method of the surrounding rock failure equivalent distances is：Using the micro seismic monitoring instrument, according to micro-
Energy distribution situation is shaken, determines the heavy damage scope of country rock, moderate damage scope, general damage envelope, the heavy damage
Scope, the moderate damage scope, the general respective border highest distance position of damage envelope to drift section frontier distance
Weighted average, as described surrounding rock failure equivalent distances；
In the step 2, the determination method of the equivalent utilization rate of support unit is：Utilize the nondestructive detecting instrument, difference
The support unit is obtained in the dramatic impact area of Stope Abutment Pressure, the lotus for significantly affecting area and the zone of influence
Carry average value, the dramatic impact area load average value of the support unit, the load average value for significantly affecting area, institute
The weighted average of the load average value three of the zone of influence is stated, the ratio with the yield strength of the support unit, is described
The equivalent utilization rate of support unit；
In the step 3, respective regions include the violent shadow of Stope Abutment Pressure under the different adjoining rock stability state
Ring area, described significantly affect area and the zone of influence；
By laying some surface displacement convergence monitoring sections in the respective regions, enclosing at each monitoring section place is measured
The maximum convergence displacement of rock, the maximum convergence displacement are that roof and floor, two help displacement variable sum when the roadway surrounding rock is stable,
The average maximum convergence displacement of the country rock is under same adjoining rock stability state, and measured each maximum convergence displacement is averaged
Value.
2. the detection method of country rock Effect of Bolt-grouting Support, its feature during a kind of working face extraction according to claim 1
It is：In the step 1, the geological conditions of selected two working faces approaches.
3. the detection method of country rock Effect of Bolt-grouting Support during a kind of working face extraction according to claim 1 or 2, it is special
Sign is：In the step 2, the support unit includes anchor pole and/or anchor cable.
4. the detection method of country rock Effect of Bolt-grouting Support, its feature during a kind of working face extraction according to claim 1
It is：In the step 4, the Parameter analysis value includes advance support slip, surrounding rock failure slip, component and utilizes raising
Rate, displacement convergence slip；
The advance support slip is：The advance support equivalent distances of the non-anchor note supported laneway and anchor note branch
The difference of the advance support equivalent distances in tunnel is protected, the ratio with the advance support equivalent distances of the non-anchor note supported laneway；
The surrounding rock failure slip is：The surrounding rock failure in the non-anchor note supported laneway and the bolt-grouting support tunnel etc.
The difference of distance is imitated, the ratio with the surrounding rock failure equivalent distances of the non-anchor note supported laneway；
The component is using increase rate：The equivalent utilization rate of the support unit in the bolt-grouting support tunnel and the non-anchor note
The difference of the equivalent utilization rate of the support unit of supported laneway, the equivalent profit of the support unit with the bolt-grouting support tunnel
With the ratio of rate；
The displacement restrains slip：Wherein, eiFor
Coefficient correlation, i=1,2,3, and ∑ ei=1, the average maximum in non-anchor note supported laneway, bolt-grouting support tunnel dramatic impact area
Restraining displacement is respectivelyThe average maximum convergence displacement for significantly affecting area is respectivelyThe zone of influence is averaged most
Restraining displacement greatly is respectively
5. the detection method of country rock Effect of Bolt-grouting Support, its feature during a kind of working face extraction according to claim 1
It is：In the step 5, the anchor notes effect comprehensive and quantitative Testing index, is the weighted average of each Parameter analysis value.
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| CN117780446B (en) * | 2024-02-26 | 2024-05-28 | 山东焱鑫矿用材料加工有限公司 | Safety performance monitoring method and system for coal mine support |
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| CN102506993A (en) * | 2011-11-21 | 2012-06-20 | 大同煤矿集团有限责任公司 | Coal mine downhole country rock slight shock detection method |
| CN104502957A (en) * | 2014-12-18 | 2015-04-08 | 贵州省矿山安全科学研究院 | Method for quickly fixing micro-seismic sensor underground |
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| CN105698853A (en) | 2016-06-22 |
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