CN105787645A - Soft rock tunnel bolting-grouting support system quantitative evaluation method - Google Patents
Soft rock tunnel bolting-grouting support system quantitative evaluation method Download PDFInfo
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- CN105787645A CN105787645A CN201610091970.6A CN201610091970A CN105787645A CN 105787645 A CN105787645 A CN 105787645A CN 201610091970 A CN201610091970 A CN 201610091970A CN 105787645 A CN105787645 A CN 105787645A
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- 239000011435 rock Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011158 quantitative evaluation Methods 0.000 title abstract 6
- 238000006073 displacement reaction Methods 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000011156 evaluation Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 238000007569 slipcasting Methods 0.000 claims description 13
- 239000011440 grout Substances 0.000 claims description 12
- 238000009659 non-destructive testing Methods 0.000 claims description 7
- 230000008093 supporting effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 238000007586 pull-out test Methods 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000011002 quantification Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The invention relates to a soft rock tunnel bolting-grouting support system quantitative evaluation method. The method comprises the following steps: step one, performing data acquisition before grouting; step two, performing data acquisition after the grouting; step three, analyzing a soft rock tunnel bolting-grouting support system; and step four, based on each performance evaluation value obtained from the third step, by use of a weight analysis method, establishing a soft rock tunnel bolting-grouting support system quantitative evaluation index, performing quantitative evaluation on the soft rock tunnel bolting-grouting support system, and marking a comparison with an onsite statistical standard value. The method has the following advantages: a nondestructive test technology is introduced to quantitative evaluation of the bolting-grouting support system for the first time ever, and through combination with such test means as drawing force testing, grouting diffusion scope detection, displacement convergence, economic indexes and the like, the soft rock tunnel bolting-grouting support system quantitative evaluation method is brought forward, for the purpose of solving such problems of backward detection means, single evaluation method, quantification incapability and the like in the prior art.
Description
Technical field
The present invention relates to a kind of Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating.
Background technology
Along with exploitation of coal resources intensity and the degree of depth increase, the soft-rock tunnel of various complicated difficult supportings occurs in a large number, causes very big threat to surrounding rock stability control and safety in production.Bolting and grouting support is as the effective means of a kind of soft rock roadway support, it is possible to improve rock crusher state, strengthens self, and deformation controlling for rock surrounding gateways destroys, and expands lane, reinforcing offer reliable basis for the tunnel later stage.But, the quantitative assessment for bolt-grouting support system is but more difficult to get, and also depends on experience at present, it mostly is qualitative evaluation, lack effective method for quantitatively evaluating, and the evaluation methodology of deformation based convergence, anchor pole (rope) ergometer etc., there is the shortcomings such as detection means is backward, accuracy rate is low.
In recent years, Dynamic Non-Destruction Measurement as the effective detection means of one, due to overcome detection sample few, by shortcomings such as time restrictions, approved by more and more field technicians, and be widely applied in the engineerings such as side slope.But utilize Non-Destructive Testing to evaluate bolt-grouting support system in mine also not have been reported that.
Summary of the invention
For solving prior art above shortcomings, the present invention provides a kind of Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating, comprises the following steps:
Step one, data acquisition before slip casting；
Step 2, data acquisition after slip casting；
Step 3, Bolt-grouting Support in Soft Rock Roadways system anlysis；
Step 4, based on each performance evaluation value that step 3 obtains, exploitation right weight analysis method, sets up Bolt-grouting Support in Soft Rock Roadways system quantitative assessing index, Bolt-grouting Support in Soft Rock Roadways system carries out quantitative assessment, and compares with field statistics standard value.
Described step one is particularly as follows: select the tunnel that two geological conditions are close and length is equal, and Article 1 tunnel adopts non-bolt-grouting support, records the maximum displacement when convergence of Article 1 roadway displacement is stablized；
To Article 1 tunnel, selecting some common bolts, the body of rod length of each common bolt isL a, anchorage length isL b, pretightning force isF c；Some high-strength anchor cables, the body of rod length of each high-strength anchor cable isL d, anchorage length isL e, pretightning force is FfHigh-strength anchor cable carry out pull-out test, wherein FfMore than the pretension force value of common anchor cable 150kN, add up all common bolts and high-strength anchor cable pulling capacity；
Adopt nondestructive testing instrument, in Article 1 tunnel, carry out common bolt, the detection of high-strength anchor cable, add up all common bolts and the work load of high-strength anchor cable；
Total number of common bolt, high-strength anchor cable in statistics Article 1 tunnel, the unit price according to common bolt, high-strength anchor cable and relevant supporting component thereof, it is determined that the cost of common bolt and high-strength anchor cable.
Described step 2 is particularly as follows: adopt bolt-grouting support to Article 2 tunnel, after Article 2 roadway grouting is stable, records the maximum displacement after the convergence of this Article 2 roadway displacement is stablized；
Select some grouted anchor bars, some grouting cable anchors to carry out pull-out test, add up all grouted anchor bars and grouting cable anchor pulling capacity；
Adopt nondestructive testing instrument, carry out grouted anchor bar, grouting cable anchor detection in slip casting district, add up the work load of all grouted anchor bars and grouting cable anchor；
Add up total number of Article 2 tunnel internal grouting blot, grouting cable anchor, the unit price according to grouted anchor bar, grouting cable anchor and relevant supporting component thereof, it is determined that the cost of grouted anchor bar and grouting cable anchor；
Carry out wall rock drill-hole in slip casting district, utilize boring to spy on record by imaging instrument and be detected in boring, add up grouted anchor bar and grouting cable anchor grout mixing.
Described step 3 is based on non-anchor note tunnel, anchor note tunnel maximum displacement；Non-anchor note tunnel common bolt, high-strength anchor cable pulling capacity, anchor note roadway grouting anchor pole, grouting cable anchor pulling capacity；Non-anchor note tunnel common bolt, high-strength anchor cable work load, anchor note roadway grouting anchor pole, grouting cable anchor work load；The total price of non-anchor note tunnel common bolt and high-strength anchor cable, the total price of anchor note roadway grouting anchor pole and grouting cable anchor；Anchor note roadway grouting anchor pole grout mixing, grouting cable anchor grout mixing, calculate bolt-grouting support displacement convergence slip, anchor rod drawing power increase rate, anchor cable pulling capacity increase rate, anchor pole work load increase rate, anchor cable work load increase rate, the support unit rate of cost reduction and grouted anchor bar, grouting cable anchor serosity diffusibility respectively.
Maximum displacement when described non-anchor note supported laneway displacement convergence is stablized is A1；Described common bolt, high-strength anchor cable pulling capacity meansigma methods respectively B1、C1；Described common bolt, high-strength anchor cable work load are respectively D1、E1；The cost of described common bolt and high-strength anchor cable is F1；Maximum displacement when described bolt-grouting support roadway displacement convergence is stablized is A2；Described grouted anchor bar, grouting cable anchor pulling capacity meansigma methods respectively B2、C2；Described grouted anchor bar, grouting cable anchor work load respectively D2、E2；Described grouted anchor bar and the cost of grouting cable anchor are F2；Described grouted anchor bar, grouting cable anchor grout mixing respectively G, H；Described bolt-grouting support displacement convergence slip；Described anchor rod drawing power increase rate；Anchor cable pulling capacity increase rate；Anchor pole work load increase rate；Anchor cable work load increase rate；The support unit rate of cost reduction；Grouted anchor bar serosity diffusibility；Grouting cable anchor serosity diffusibility, wherein,LFor grouted anchor bar length,JFor grouting cable anchor length.
Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating according to claim 4, it is characterised in that in described step 4, is the comprehensive evaluation index R=∑ M being weighted by obtaining mechanical propertynRn, and by R value and certain concrete Bolt-grouting Support in Soft Rock Roadways system quantitative assessment statistical effect standard value R0Relatively, Bolt-grouting Support in Soft Rock Roadways system quantitative assessment effect can quantitatively be obtained；Wherein, MnFor weight coefficient, n=1,2 ... .8, its size is according to R1~R8Size and reliability and the accuracy of test data be allocated, meet ∑ Mn=1.
The invention have the advantage that Dynamic Non-Destruction Measurement is incorporated in bolt-grouting support system quantitative assessment by the present invention first, and in conjunction with means of testing such as pulling capacity test, the detection of slip casting range of scatter, displacement convergence, economic indicators, being directed to a kind of Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating, prior art detection means is backward, evaluation methodology is single, cannot quantitatively wait problem in solution.
Detailed description of the invention
Below in conjunction with specific embodiment further describe the present invention, advantages of the present invention and feature will be with describe and apparent.But these embodiments are only exemplary, the scope of the present invention is not constituted any restriction.It will be understood by those skilled in the art that and the details of technical solution of the present invention and form can be modified or replace lower without departing from the spirit and scope of the present invention, but these amendments and replacement each fall within protection scope of the present invention.
The present invention relates to a kind of Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating, comprise the following steps:
Step one, data acquisition before slip casting；
Step 2, data acquisition after slip casting；
Step 3, Bolt-grouting Support in Soft Rock Roadways system anlysis；
Step 4, based on each performance evaluation value that step 3 obtains, exploitation right weight analysis method, sets up Bolt-grouting Support in Soft Rock Roadways system quantitative assessing index, Bolt-grouting Support in Soft Rock Roadways system carries out quantitative assessment, and compares with field statistics standard value.
Described step one is particularly as follows: select the tunnel that the geological conditions such as two geological structures are close and length is equal, and Article 1 tunnel adopts non-bolt-grouting support, records the maximum displacement when convergence of Article 1 roadway displacement is stablized；
To Article 1 tunnel, selecting some common bolts, the body of rod length of each common bolt isL a, anchorage length isL b, pretightning force isF c；Some high-strength anchor cables, the body of rod length of each high-strength anchor cable isL d, anchorage length isL e, pretightning force is FfHigh-strength anchor cable carry out pull-out test, wherein FfMore than the pretension force value of common anchor cable 150kN, add up all common bolts and high-strength anchor cable pulling capacity；
Adopt nondestructive testing instrument, in Article 1 tunnel, carry out common bolt, the detection of high-strength anchor cable, add up all common bolts and the work load of high-strength anchor cable；
Total number of common bolt, high-strength anchor cable in statistics Article 1 tunnel, the unit price according to common bolt, high-strength anchor cable and relevant supporting component thereof, it is determined that the cost of common bolt and high-strength anchor cable.
Described step 2 is particularly as follows: adopt bolt-grouting support to Article 2 tunnel, after Article 2 roadway grouting is stable, records the maximum displacement after the convergence of this Article 2 roadway displacement is stablized；
Select some grouted anchor bars, some grouting cable anchors to carry out pull-out test, add up all grouted anchor bars and grouting cable anchor pulling capacity；
Adopt nondestructive testing instrument, carry out grouted anchor bar, grouting cable anchor detection in slip casting district, add up the work load of all grouted anchor bars and grouting cable anchor；
Add up total number of Article 2 tunnel internal grouting blot, grouting cable anchor, the unit price according to grouted anchor bar, grouting cable anchor and relevant supporting component thereof, it is determined that the cost of grouted anchor bar and grouting cable anchor；
Carry out wall rock drill-hole in slip casting district, utilize boring to spy on record by imaging instrument and be detected in boring, add up grouted anchor bar and grouting cable anchor grout mixing.
Described step 3 is based on non-anchor note tunnel, anchor note tunnel maximum displacement；Non-anchor note tunnel common bolt, high-strength anchor cable pulling capacity, anchor note roadway grouting anchor pole, grouting cable anchor pulling capacity；Non-anchor note tunnel common bolt, high-strength anchor cable work load, anchor note roadway grouting anchor pole, grouting cable anchor work load；The total price of non-anchor note tunnel common bolt and high-strength anchor cable, the total price of anchor note roadway grouting anchor pole and grouting cable anchor；Anchor note roadway grouting anchor pole grout mixing, grouting cable anchor grout mixing, calculate bolt-grouting support displacement convergence slip, anchor rod drawing power increase rate, anchor cable pulling capacity increase rate, anchor pole work load increase rate, anchor cable work load increase rate, the support unit rate of cost reduction and grouted anchor bar, grouting cable anchor serosity diffusibility respectively.
Maximum displacement when described non-anchor note supported laneway displacement convergence is stablized is A1；Described common bolt, high-strength anchor cable pulling capacity meansigma methods respectively B1、C1；Described common bolt, high-strength anchor cable work load are respectively D1、E1；The cost of described common bolt and high-strength anchor cable is F1；Maximum displacement when described bolt-grouting support roadway displacement convergence is stablized is A2；Described grouted anchor bar, grouting cable anchor pulling capacity meansigma methods respectively B2、C2；Described grouted anchor bar, grouting cable anchor work load respectively D2、E2；Described grouted anchor bar and the cost of grouting cable anchor are F2；Described grouted anchor bar, grouting cable anchor grout mixing respectively G, H；Described bolt-grouting support displacement convergence slip；Described anchor rod drawing power increase rate；Anchor cable pulling capacity increase rate；Anchor pole work load increase rate；Anchor cable work load increase rate；The support unit rate of cost reduction；Grouted anchor bar serosity diffusibility；Grouting cable anchor serosity diffusibility, wherein,LFor grouted anchor bar length,JFor grouting cable anchor length.
In described step 4, it is the comprehensive evaluation index R=∑ M being weighted by obtaining mechanical propertynRn, and by R value and certain concrete Bolt-grouting Support in Soft Rock Roadways system quantitative assessment statistical effect standard value R0Relatively, Bolt-grouting Support in Soft Rock Roadways system quantitative assessment effect can quantitatively be obtained；Wherein, MnFor weight coefficient, n=1,2 ... .8, its size is according to R1~R8Size and reliability and the accuracy of test data be allocated, meet ∑ Mn=1.
Claims (6)
1. a Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating, it is characterised in that comprise the following steps:
Step one, data acquisition before slip casting；
Step 2, data acquisition after slip casting；
Step 3, Bolt-grouting Support in Soft Rock Roadways system anlysis；
Step 4, based on each performance evaluation value that step 3 obtains, exploitation right weight analysis method, sets up Bolt-grouting Support in Soft Rock Roadways system quantitative assessing index, Bolt-grouting Support in Soft Rock Roadways system carries out quantitative assessment, and compares with field statistics standard value.
2. Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating according to claim 1, it is characterized in that, described step one is particularly as follows: select the tunnel that two geological conditions are close and length is equal, Article 1, tunnel adopts non-bolt-grouting support, records the maximum displacement when convergence of Article 1 roadway displacement is stablized；
To Article 1 tunnel, selecting some common bolts, the body of rod length of each common bolt isL a, anchorage length isL b, pretightning force isF c；Some high-strength anchor cables, the body of rod length of each high-strength anchor cable isL d, anchorage length isL e, pretightning force is FfHigh-strength anchor cable carry out pull-out test, wherein FfMore than the pretension force value of common anchor cable 150kN, add up all common bolts and high-strength anchor cable pulling capacity；
Adopt nondestructive testing instrument, in Article 1 tunnel, carry out common bolt, the detection of high-strength anchor cable, add up all common bolts and the work load of high-strength anchor cable；
Total number of common bolt, high-strength anchor cable in statistics Article 1 tunnel, the unit price according to common bolt, high-strength anchor cable and relevant supporting component thereof, it is determined that the cost of common bolt and high-strength anchor cable.
3. Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating according to claim 1, it is characterized in that, described step 2 is particularly as follows: adopt bolt-grouting support to Article 2 tunnel, after Article 2 roadway grouting is stable, records the maximum displacement after the convergence of this Article 2 roadway displacement is stablized；
Select some grouted anchor bars, some grouting cable anchors to carry out pull-out test, add up all grouted anchor bars and grouting cable anchor pulling capacity；
Adopt nondestructive testing instrument, carry out grouted anchor bar, grouting cable anchor detection in slip casting district, add up the work load of all grouted anchor bars and grouting cable anchor；
Add up total number of Article 2 tunnel internal grouting blot, grouting cable anchor, the unit price according to grouted anchor bar, grouting cable anchor and relevant supporting component thereof, it is determined that the cost of grouted anchor bar and grouting cable anchor；
Carry out wall rock drill-hole in slip casting district, utilize boring to spy on record by imaging instrument and be detected in boring, add up grouted anchor bar and grouting cable anchor grout mixing.
4. Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating according to claim 1, it is characterised in that described step 3 is based on non-anchor note tunnel, anchor note tunnel maximum displacement；Non-anchor note tunnel common bolt, high-strength anchor cable pulling capacity, anchor note roadway grouting anchor pole, grouting cable anchor pulling capacity；Non-anchor note tunnel common bolt, high-strength anchor cable work load, anchor note roadway grouting anchor pole, grouting cable anchor work load；The total price of non-anchor note tunnel common bolt and high-strength anchor cable, the total price of anchor note roadway grouting anchor pole and grouting cable anchor；Anchor note roadway grouting anchor pole grout mixing, grouting cable anchor grout mixing, calculate bolt-grouting support displacement convergence slip, anchor rod drawing power increase rate, anchor cable pulling capacity increase rate, anchor pole work load increase rate, anchor cable work load increase rate, the support unit rate of cost reduction and grouted anchor bar, grouting cable anchor serosity diffusibility respectively.
5. Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating according to claim 4, it is characterised in that maximum displacement when described non-anchor note supported laneway displacement convergence is stablized is A1；Described common bolt, high-strength anchor cable pulling capacity meansigma methods respectively B1、C1；Described common bolt, high-strength anchor cable work load are respectively D1、E1；The cost of described common bolt and high-strength anchor cable is F1；Maximum displacement when described bolt-grouting support roadway displacement convergence is stablized is A2；Described grouted anchor bar, grouting cable anchor pulling capacity meansigma methods respectively B2、C2；Described grouted anchor bar, grouting cable anchor work load respectively D2、E2；Described grouted anchor bar and the cost of grouting cable anchor are F2；Described grouted anchor bar, grouting cable anchor grout mixing respectively G, H；Described bolt-grouting support displacement convergence slip；Described anchor rod drawing power increase rate；Anchor cable pulling capacity increase rate；Anchor pole work load increase rate；Anchor cable work load increase rate；The support unit rate of cost reduction；Grouted anchor bar serosity diffusibility；Grouting cable anchor serosity diffusibility, wherein,LFor grouted anchor bar length,JFor grouting cable anchor length.
6. Bolt-grouting Support in Soft Rock Roadways system method for quantitatively evaluating according to claim 4, it is characterised in that in described step 4, is the comprehensive evaluation index R=∑ M being weighted by obtaining mechanical propertynRn, and by R value and certain concrete Bolt-grouting Support in Soft Rock Roadways system quantitative assessment statistical effect standard value R0Relatively, Bolt-grouting Support in Soft Rock Roadways system quantitative assessment effect can quantitatively be obtained；Wherein, MnFor weight coefficient, n=1,2 ... .8, its size is according to R1~R8Size and reliability and the accuracy of test data be allocated, meet ∑ Mn=1.
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| CN201610091970.6A CN105787645B (en) | 2016-02-19 | 2016-02-19 | Quantitative evaluation method for soft rock roadway bolting-grouting support system |
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| CN201610091970.6A CN105787645B (en) | 2016-02-19 | 2016-02-19 | Quantitative evaluation method for soft rock roadway bolting-grouting support system |
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|---|---|---|---|---|
| US20100148566A1 (en) * | 2008-12-17 | 2010-06-17 | Lok Home | All-conditions tunnel boring machine |
| CN103077287A (en) * | 2013-01-22 | 2013-05-01 | 中国矿业大学 | Supporting design specialist system for bolt-grouting of coal mine soft rock tunnel |
| CN103984788A (en) * | 2013-12-31 | 2014-08-13 | 中国矿业大学(北京) | Automatic intelligent design and optimization system for anchor bolt support of coal tunnel |
| US20150300171A1 (en) * | 2012-11-09 | 2015-10-22 | Gazmick Pty Ltd | Device, method and system for loading fixatives for rock bolts |
| CN105302934A (en) * | 2015-07-10 | 2016-02-03 | 中国矿业大学 | Multi-objective intelligent optimization design method for anchoring and protecting network structure of coal mine underground roadway |
-
2016
- 2016-02-19 CN CN201610091970.6A patent/CN105787645B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100148566A1 (en) * | 2008-12-17 | 2010-06-17 | Lok Home | All-conditions tunnel boring machine |
| US20150300171A1 (en) * | 2012-11-09 | 2015-10-22 | Gazmick Pty Ltd | Device, method and system for loading fixatives for rock bolts |
| CN103077287A (en) * | 2013-01-22 | 2013-05-01 | 中国矿业大学 | Supporting design specialist system for bolt-grouting of coal mine soft rock tunnel |
| CN103984788A (en) * | 2013-12-31 | 2014-08-13 | 中国矿业大学(北京) | Automatic intelligent design and optimization system for anchor bolt support of coal tunnel |
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