CN112329206A - Tunnel construction non-blasting area judgment method - Google Patents
Tunnel construction non-blasting area judgment method Download PDFInfo
- Publication number
- CN112329206A CN112329206A CN202011105132.2A CN202011105132A CN112329206A CN 112329206 A CN112329206 A CN 112329206A CN 202011105132 A CN202011105132 A CN 202011105132A CN 112329206 A CN112329206 A CN 112329206A
- Authority
- CN
- China
- Prior art keywords
- blasting
- point
- protected
- rock
- value
- 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.)
- Pending
Links
- 238000005422 blasting Methods 0.000 title claims abstract description 85
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 claims abstract description 61
- 239000002360 explosive Substances 0.000 claims description 4
- 238000012876 topography Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The invention relates to the field of tunnel construction methods, in particular to a method for judging a non-blasting area in tunnel construction. Based on rock wave transmission principle sigma ═ k rho cV and Lemaitre equivalent stress principle
And calculating the vibration speed of the blasting peak value. The blasting peak value vibration speed which can be borne by the protected point is calculated according to the environmental parameters of the protected point, and the calculation result is accurate and reliable instead of being arbitrarily valued through industry experience. When calculating the distance between the point capable of blasting and the protected point, according to a formula
Description
Technical Field
The invention relates to the field of tunnel construction methods, in particular to a method for judging a non-blasting area in tunnel construction.
Background
The drilling and blasting method has strong adaptability to various complex geologies and high economic benefit, is suitable for the construction of tunnels with hard and broken rocks and tunnels with short lengths, but blasting construction can cause strong vibration inside surrounding rocks and on the earth surface, particularly, the phenomenon of damage can be generated in weak surrounding rock sections, and unnecessary overlarge vibration can cause large-range expansion of plastic areas of the surrounding rocks or collapse of rock masses. Tunnels are typically provided with rescue stations. The rescue station has the advantages of multiple districts, multiple intersections, complex network, complex structure, multiple special structures and multiple close-connection tunnels, so that the blasting construction of the rescue station needs to be controlled.
The method adopts the Sudofski formula in blasting safety regulations in China to predict the influence distance of blasting on the structure in the blasting process. Namely by the formula
Calculating and predicting V-explosion vibration peak value speed in the formula; q-the maximum explosive quantity of single-stage blasting; r-the distance from the explosion point to the measuring point; k-coefficients relating to type of media and type of blast; alpha-geological topography, etc.
When the prior art is used for prediction, the blasting vibration peak speed in the formula is taken according to industry experience, and no related specific calculation formula is provided. Meanwhile, the formula is not suitable for large-scale complex underground overpass structures, and the influence of height difference is not considered.
Disclosure of Invention
The invention aims to provide a judging method for a non-blasting area in tunnel construction, which can calculate the blasting vibration peak speed of a protected point and calculate the distance between a point capable of blasting and the protected point according to the relative height difference between the protected point and the blasting point, so that the calculation result is more accurate.
The embodiment of the invention is realized by the following steps:
a method for judging a non-blasting area in tunnel construction comprises the following steps:
s1: determining a protected point calculation parameter;
s2: calculating the blasting vibration peak speed of the protected point according to the calculation parameters;
s3: and calculating the distance between the point capable of blasting and the protected point according to the blasting vibration peak speed of the protected point and the height difference between the blasting point and the protected point.
Further, the calculation parameters comprise the compressive strength σ of the surrounding rock of the protected pointcA safety factor k, an initial radius r of the microcrack, a rock density rho of the protected point, a rock longitudinal wave velocity c of the protected point and a stress sigma in the rock of the protected point.
Further, the calculation process of the peak velocity of the blasting vibration of the protected point is as follows:
s21: according to the formula σc＝83.41KICCalculating to obtain KICA value of (d);
s22: according to the formula
Calculating to obtain a value of sigma;
s23: and calculating the blasting vibration peak value speed V of the protected point according to the formula sigma-k rho cV.
Further, the distance between the point capable of blasting and the protected point is according to a formula
Calculating; in the formula, the relative height difference between the blasting point and the protected point is H; the distance between the point capable of blasting and the protected point is R; k is a coefficient related to the type of the medium and the type of blasting; q is the maximum explosive quantity of single-stage blasting; alpha is rock class such as geological topography.
Furthermore, the value range of beta is 0.25-0.28, beta is positive when the relative height difference between the blasting point and the protected point is positive, and beta is negative when the relative height difference between the blasting point and the protected point is negative; if the rock stratum is hard rock, the maximum value of beta is obtained; if the rock formation is soft rock, the minimum value of beta is taken.
Further, the safety coefficient k is 0.8.
Further, if the rock stratum is hard and complete hard rock, the value of r is 0.01 m; if the rock stratum is medium hard rock, the value of r is 0.04 m; if the rock stratum is soft rock, the value of r is 0.16 m.
The invention has the beneficial effects that:
the invention adopts the rock wave transmission principle sigma ═ k rho cV and Lemaitre equivalent stress principle
And calculating the vibration speed of the blasting peak value. The blasting peak value vibration speed which can be borne by the protected point is calculated according to the environmental parameters of the protected point instead of being arbitrarily valued through industry experience, and the calculation result is accurate and reliable.
When calculating the distance between the point capable of blasting and the protected point, according to a formula
And (6) performing calculation. Wherein H is the relative height difference between the blasting point and the protected point. The relative height difference between the blasting point and the protected point is considered, so that the calculated value is more accurate and reliable.
Detailed Description
Example (b):
the embodiment provides a method for judging a non-blasting area in tunnel construction. Tunnels are typically provided with rescue stations. The rescue station has the advantages of multiple districts, multiple intersections, complex network, complex structure, multiple special structures and multiple close-connection tunnels. Therefore, when blasting the tunnel, the influence of blasting on surrounding rocks of the adjacent tunnel needs to be considered. And (4) setting surrounding rocks of adjacent tunnels as protected points. The method for judging the non-blasting area in tunnel construction comprises the following steps:
s1: the protected point calculation parameters are determined. Calculating the compressive strength σ of the surrounding rock with parameters including protected pointscA safety factor k, an initial radius r of the microcrack, a rock density rho of the protected point, a rock longitudinal wave velocity c of the protected point and a stress sigma in the rock of the protected point.
Compressive strength sigma of surrounding rock of protected pointcThe rock density rho of the protected point and the rock longitudinal wave velocity c of the protected point can be obtained according to the rock type and can also be obtainedCan be obtained by testing. The safety coefficient k is 0.8, and other values can be taken as required in practice. The initial radius r of the microcracks is determined by the hardness and integrity of the rock. If the rock stratum is hard and complete hard rock, the value of r is 0.01 m; if the rock stratum is medium hard rock, the value of r is 0.04 m; if the rock stratum is soft rock, the value of r is 0.16 m.
S2: and calculating the peak blasting vibration speed of the protected point according to the calculation parameters, wherein the calculation process is as follows:
s21: according to the formula σc＝83.41KICCalculating to obtain KICThe value of (c).
S22: according to Lemailre equivalent stress formula
The value of the stress σ in the rock at the protected point is calculated.
S23: and calculating the blasting vibration peak value speed V of the protected point according to the formula sigma-k rho cV.
S3: and calculating the distance between the point capable of blasting and the protected point according to the blasting vibration peak speed of the protected point and the height difference between the blasting point and the protected point. Is calculated by the formula
And (6) performing calculation. In the formula, the relative height difference between the blasting point and the protected point is H. The distance between the point where blasting can be performed and the protected point is R. K is a coefficient related to the type of the medium and the type of blasting. Q is the maximum explosive quantity of single-stage blasting. Alpha is rock class such as geological topography.
The value range of beta is 0.25-0.28, the beta is positive when the relative height difference between the blasting point and the protected point is positive, and the beta is negative when the relative height difference between the blasting point and the protected point is negative. If the formation is hard, β is taken as the maximum. If the rock layer is soft rock, the minimum value of beta is taken.
The value of the distance R between the point at which blasting is possible and the protected point can be calculated by the above calculation. And constructing the tunnel section except the distance taking the value of R as the radius by taking the protected point as the center through blasting. In practice, multiple points of the protected tunnel are selected as protected points, and the tunnel construction non-blasting area can be obtained through multiple values.
For the tunnel construction with a dense cavern, the surrounding rocks of the constructed tunnel are protected points. And calculating the value of the distance R between each point of the surrounding rock of the constructed tunnel and the point capable of blasting to obtain the blasting construction tunnel section of the tunnel to be constructed.
The invention adopts the rock wave transmission principle sigma ═ k rho cV and Lemaitre equivalent stress principle
And calculating the vibration speed of the blasting peak value. The blasting peak value vibration speed which can be borne by the protected point is calculated according to the environmental parameters of the protected point instead of being arbitrarily valued through industry experience, and the calculation result is accurate and reliable.
When calculating the distance between the point capable of blasting and the protected point, according to a formula
And (6) performing calculation. Wherein H is the relative height difference between the blasting point and the protected point. The relative height difference between the blasting point and the protected point is considered, so that the calculated value is more accurate and reliable.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for judging a non-blasting area in tunnel construction is characterized by comprising the following steps: the method comprises the following steps:
s1: determining a protected point calculation parameter;
s2: calculating the blasting vibration peak speed of the protected point according to the calculation parameters;
s3: and calculating the distance between the point capable of blasting and the protected point according to the blasting vibration peak speed of the protected point and the height difference between the blasting point and the protected point.
2. The method for judging a non-blasting area for tunnel construction according to claim 1, wherein: the calculation parameters comprise the compressive strength sigma of the surrounding rock of the protected pointcA safety factor k, an initial radius r of the microcrack, a rock density rho of the protected point, a rock longitudinal wave velocity c of the protected point and a stress sigma in the rock of the protected point.
3. The method for determining a non-blasting area for tunnel construction according to claim 2, wherein: the calculation process of the blasting vibration peak speed of the protected point is as follows:
s21: according to the formula σc＝83.41KICCalculating to obtain KICA value of (d);
s22: according to the formula
Calculating to obtain a value of sigma;
s23: and calculating the blasting vibration peak value speed V of the protected point according to the formula sigma-k rho cV.
4. The method for judging a non-blasting area for tunnel construction according to claim 3, wherein: the distance between the point capable of blasting and the protected point is calculated according to a formula
Calculating; in the formula, the relative height difference between the blasting point and the protected point is H; the distance between the point capable of blasting and the protected point is R; k is a coefficient related to the type of the medium and the type of blasting; q is the maximum explosive quantity of single-stage blasting; alpha is rock class such as geological topography.
5. The method for judging a non-blasting area for tunnel construction according to claim 4, wherein: the value range of beta is 0.25-0.28, beta is positive when the relative height difference between the blasting point and the protected point is positive, and beta is negative when the relative height difference between the blasting point and the protected point is negative; if the rock stratum is hard rock, taking the maximum value of beta; if the rock formation is soft rock, the minimum value of beta is taken.
6. The method for determining a non-blasting area for tunnel construction according to claim 2, wherein: the safety coefficient k is 0.8.
7. The method for determining a non-blasting area for tunnel construction according to claim 2, wherein: if the rock stratum is hard and complete hard rock, the value of r is 0.01 m; if the rock stratum is medium hard rock, the value of r is 0.04 m; if the rock stratum is soft rock, the value of r is 0.16 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105132.2A CN112329206A (en) | 2020-10-15 | 2020-10-15 | Tunnel construction non-blasting area judgment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011105132.2A CN112329206A (en) | 2020-10-15 | 2020-10-15 | Tunnel construction non-blasting area judgment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112329206A true CN112329206A (en) | 2021-02-05 |
Family
ID=74313812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011105132.2A Pending CN112329206A (en) | 2020-10-15 | 2020-10-15 | Tunnel construction non-blasting area judgment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112329206A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964144A (en) * | 2021-04-21 | 2021-06-15 | 中铁二十三局集团第一工程有限公司 | Soft rock railway tunnel blasting construction method in stress environment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019007439A1 (en) * | 2017-07-04 | 2019-01-10 | 中国矿业大学 | Automatic height adjusting apparatus and method for shearer based on advanced detection of shearer seismic source |
| CN110926288A (en) * | 2020-01-02 | 2020-03-27 | 河南理工大学 | Optimization method of shallow tunnel blasting cut-out dosage considering cavity effect |
-
2020
- 2020-10-15 CN CN202011105132.2A patent/CN112329206A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019007439A1 (en) * | 2017-07-04 | 2019-01-10 | 中国矿业大学 | Automatic height adjusting apparatus and method for shearer based on advanced detection of shearer seismic source |
| CN110926288A (en) * | 2020-01-02 | 2020-03-27 | 河南理工大学 | Optimization method of shallow tunnel blasting cut-out dosage considering cavity effect |
Non-Patent Citations (1)
| Title |
|---|
| 刘航雨等: "深埋软岩紧急救援站爆破安全距离的研究", 《四川建筑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964144A (en) * | 2021-04-21 | 2021-06-15 | 中铁二十三局集团第一工程有限公司 | Soft rock railway tunnel blasting construction method in stress environment |
| CN112964144B (en) * | 2021-04-21 | 2023-03-14 | 中铁二十三局集团第一工程有限公司 | Soft rock railway tunnel blasting construction method in stress environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Silva et al. | Practical assessment of rock damage due to blasting | |
| CN109631701B (en) | Numerical simulation method for tunnel blasting | |
| CN108665105B (en) | Method for predicting development height of water guide crack belt | |
| Mohamad et al. | A simulation approach to predict blasting-induced flyrock and size of thrown rocks | |
| CN106372297B (en) | Method for determining safe vertical distance between shield and karst cave in sandy soil karst stratum | |
| CN109681180B (en) | Method for pre-evaluating strong mine pressure effect of coal mine ground fracturing hard roof control stope | |
| CN115130311B (en) | Method for judging water inrush disaster of coal seam overlying strata separation layer | |
| CN107169248A (en) | A kind of special formation mud weight range determines method | |
| Li et al. | Safety distance of shotcrete subjected to blasting vibration in large-span high-speed railway tunnels | |
| CN111666624A (en) | Method for evaluating stability of surrounding rock of large-span underground cavern under non-support condition | |
| CN112329206A (en) | Tunnel construction non-blasting area judgment method | |
| CN111695790A (en) | Mining method for security pillar | |
| CN116522692B (en) | Underground engineering surrounding rock structural feature in-situ detection and classification method | |
| Yu et al. | Study on rockburst nucleation process of deep-buried tunnels based on microseismic monitoring | |
| WO2023202074A1 (en) | Asymmetric high-stress tunnel blasting vibration test method and system | |
| CN114135288B (en) | Method for optimizing high-pressure water jet slotting pressure relief parameters of rock burst coal seam roadway | |
| KR0185657B1 (en) | Method of classifying shot rock considering discontinuity of rock | |
| Morozov | Creation of rock mass monitoring deformations systems on rock burst hazardous mineral deposits | |
| CN112364489B (en) | Carbon dioxide blasting construction method for controlling damage and vibration effect of bedrock | |
| CN110427688B (en) | Ground stress prediction method based on actual measurement vibration | |
| Mohebi et al. | Adaptive-neuro fuzzy inference system (ANFIS) model for prediction of blast-induced ground vibration | |
| RU2386032C1 (en) | Definition method of content of effective component in imploded mountain mass at its excavation at motions | |
| CN107916917B (en) | Method for improving hydraulic fracturing double-wing crack length | |
| CN110823031A (en) | Blasting construction method for shallow tunnel | |
| Zharikov et al. | Designing Blast Pattern for Pitwall Rock Mass |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |