CN105466290A - Cutting excavation blasting method - Google Patents
Cutting excavation blasting method Download PDFInfo
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- CN105466290A CN105466290A CN201510758140.XA CN201510758140A CN105466290A CN 105466290 A CN105466290 A CN 105466290A CN 201510758140 A CN201510758140 A CN 201510758140A CN 105466290 A CN105466290 A CN 105466290A
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention relates to the technical field of controlled blasting, in particular to a cutting excavation blasting method. Through the method, the problem that cutting slope surrounding rock is damaged and affected by blasting in cutting excavation of expressways is solved, and the method is used for cutting blasting excavation of expressways. The cutting excavation blasting method comprises the following steps that a blasting scheme is determined according to actual conditions of engineering; blasting parameters are determined, and the step mainly includes the procedures of arrangement of blast holes, setting of parameters of main blasting holes and setting of parameters of presplit holes and buffer holes; design of charge structures of the main blasting holes, the presplit holes and the buffer holes is determined; and a detonating network and a detonating method are designed.
Description
[technical field]
The present invention relates to Controlled blasting technique field, be specifically related to a kind of cutting excavation blasting procedure.
[background technology]
Current in high-grade highway construction, Blasting Excavation is high-volume large, also need to consider cut-and-cover balance, explosion to the destruction of cut slope country rock and etc. adverse effect, therefore utilize the requirement of Controlled blasting technique excavating cut slope more and more higher.In traditional Cutting Excavation Blasting excavation technology, utilize small-bore, large dose single explosion and adopt the technology such as small-sized ketone room explosion, these blasting techniques, easily damage and fracture being produced to cut slope because dose is excessive.In order to protect cut slope not affect by explosion, someone uses V-type kerf blasting to carry out cutting excavation, achieves good effect, but in construction, inclined hole is too much, unfavorable quickenings perforation construction speed and ensuring the quality of products, and does not take the safeguard measure of necessity to side slope.At some specific construction section, according to design and the technical requirement of associated construction specification: specific blasting method must be used to excavate; Side slope pre split explosion Half cast factor and Slope leveling degree should reach regulation requirement; Roadbed can not be owed to dig, and the amount of backbreaking and blast fragmentation size meet embankment requirement.
[summary of the invention]
The present invention is intended in highway cutting excavation, avoids explosion on the destruction of cut slope country rock and impact, proposes one and selects heavy caliber medium-length hole, takes to optimize the measure such as charge constitution and blasting parameter to control the blasting method of cutting excavation.
The present invention solves the problems of the technologies described above the technical scheme taked to be, a kind of cutting excavation blasting procedure, is characterized in that it comprises the steps:
(1) blasting scheme is determined according to engineering fact
According to by the requirement of the topographic and geologic condition of burst region, comprehensive Design and construction, in order to ensure the balance of digging, filling out cross-operation progress in work progress, and lumpiness, the smooth stability of side slope requirement, adopt the mode operation of segmentation operation.
(2) blast hole parameter setting
By trying quick-friedly to obtain main blast hole blasting parameter, pre-ceasma and Buffer control parameter respectively, wherein:
1. during main blast hole blasting parameter setting: explosive specific charge q=0.6kg/m
3, two row's single holes strengthen powder charge unit consumption q=0.6kg/m before main blast hole single hole
3, rear row's single hole powder charge unit consumption q=0.5kg/m
3;
2. during pre-ceasma blasting parameter setting: normal reach degree of packing q=0.48kg/m, strengthening segment degree of packing q=0.6kg/m, the section of weakening degree of packing q=0.24kg/m;
3. during Buffer control setting parameter: bottom strengthening segment degree of packing q=0.6kg/m, middle part normal charge density q=1.6kg/m.
(3) charge constitution design
1. main blast hole charge constitution design: main blast hole is made up of choke material section and explosive filled section, wherein choke material segment length is 1.6m, and explosive filled section length should be greater than 5m, and described technique relates to blast hole depth and is greater than 8m, adopt layered charge, powder charge interlayer is spaced apart 1.0 ~ 1.5m;
2. pre-ceasma charge constitution design: pre-ceasma by choke material section, weaken powder charge section, normal charge section, strengthen powder charge section and form, apart from pre-ceasma powder charging bottom 1.0 ~ 1.5m place for strengthening powder charge section, filling distance is 0.5 ~ 1.0m, and below filling position, the position of 1.0m is for weakening powder charge section;
3. cushion hole charge constitution design: cushion hole is made up of hole section choke material section, normal charge section, choke material section, reinforcement powder charge section.Distance cushion hole powder charging bottom 1.0 ~ 1.5m place is for strengthening powder charge section, and nose end filling distance is 2.5 ~ 2.5m, and the filler distance strengthened between powder charge section and filling powder charge section is 1.0 ~ 1.5m, and normal charge length adjusts according to hole depth.
(4) blasting circuit and method of ignition design
1. design of firing circuit: small pit goaf adopts elementary errors between row, large dose adopts single hole elementary errors, makes each big gun hole obtain the good side direction scope of freedom, reaches the object of control of flyrock;
2. method of ignition design: use instant electric detonator to detonate non-electric net, detonating power supply uses rechargeable initiator, to control the burst time accurately, guarantees that networking security is detonated.
The invention has the beneficial effects as follows: the impact avoiding the not yet done explosion of cutting excavation, can punching rate be accelerated, construction excavation and filling balanced operation can be realized; Ensure that oversized fragment rate is below 15%, side slope Half cast factor, more than 90%, facilitates the excavation of cutting; Can under irregular terrain profiles condition batch realize inclination short-selling wear brill, the effect that cut slope flatness and cutting do not stay foundation can be realized.
[accompanying drawing explanation]
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the cross-sectional view of the present invention for certain highway cutting excavation steel for shot.
Fig. 2 is the plane of the present invention for certain highway cutting excavation steel for shot.
Fig. 3 is the schematic diagram of the present invention for the main blast hole charge constitution of certain highway cutting excavation.
Fig. 4 is the schematic diagram of the present invention for the pre-ceasma charge constitution of certain highway cutting excavation.
Fig. 5 is the schematic diagram of the present invention for certain highway cutting excavation cushion hole charge constitution.
Fig. 6 is the schematic diagram of the present invention for certain highway cutting excavation blasting circuit.
Wherein, the pre-ceasma of 1-, 2-cushion hole, the main blast hole of 3-, 4-Shi Bao district, 5-choke material, 6-explosive, 7-non-electric ms detonator, 8-primacord, 9-weaken powder charge section, 10-normal charge section, 11-reinforcement powder charge section, 12-instant electric detonator.
[detailed description of the invention]
Need the embodiment of cutting excavation to be described further the present invention below in conjunction with accompanying drawing and certain highway, but be not limiting the scope of the present invention.
Project profile: certain Expressway South Section circuit institute is many in east-west through mountain range, region, and topography and geomorphology is relatively milder, and formation rock is mainly limestone, and cleavage is grown; Wriggle and rise and fall in mountain range, cheuch is open, Valley Development, and valley floor is covered with quaternary sediment, forms large-scale coombe.Excavating cut slope is east-west, the long 519m of excavation circuit; Roadbed design width 28m, north side grade of side slope 1: 0.6, southern side grade of side slope 1: 0.7, maximum cutting depth 24m; Around excavating cut slope within the scope of 1km without any building, be applicable to blast working operation.
In conjunction with above-mentioned engineering, a kind of cutting excavation blasting procedure, is characterized in that it comprises the steps:
(1) blasting scheme is determined according to engineering fact
According to above-mentioned project profile, the requirement of comprehensive Design and construction, in order to ensure the balance of digging, filling out cross-operation progress in work progress, and lumpiness, the smooth stability of side slope requirement, adopt the mode operation of segmentation operation.Presplitting orifice angle arranges identical with grade of side slope, and main blast hole and cushion hole are arranged vertically, and see shown in Fig. 1 and Fig. 2.
(2) blast hole parameter setting
By trying quick-friedly to obtain main blast hole blasting parameter, pre-ceasma and Buffer control parameter respectively, setting parameter is as follows:
1. main blast hole blasting parameter setting: the layer height H determining main blast hole, every layer of cutting depth H=8 ~ 12m, toe burden W
p=4.0m, array pitch b
main=3.5m, pitch-row a
main=4m, main armament hole ultra-deep h=0.2m, main armament hole melt flow length L=2m, explosive specific charge q=0.6kg/m
3, two row's single holes strengthen powder charge unit consumption q before main blast hole single hole
before=0.6kg/m
3, rear row's single hole powder charge unit consumption q
just=0.5kg/m
3, single hole explosive payload Q
before=q
before× a
main× H × W
p=64 ~ 96 (kg), Q
just=q
just× a
main× H × W
p=76.8 ~ 115.2 (kg);
2. pre-ceasma optimum configurations: presplitting hole drilling diameter d=100mm, presplitting Kongzui island operation W
in advance=1.8m, pre-ceasma pitch-row a
in advance=1.2m, normal reach degree of packing q
line=0.48kg/m, strengthening segment degree of packing q
add=0.6kg/m, the section of weakening degree of packing q
subtract=0.24kg/m;
3. cushion hole optimum configurations: bottom strengthening segment degree of packing q
add=0.6kg/m, middle part normal charge density q
line=1.6kg/m, pitch-row get 2m, choke material segment length gets 0.5 ~ 1.0m.
(3) charge constitution design
1. main blast hole charge constitution design: according to content of the present invention, as shown in Figure 3, main blast hole is made up of choke material section (5) and explosive filled section (6), non-electric ms detonator (7), primacord (8), wherein choke material segment length is 1.6m, and explosive filled section length should be greater than 5m, and described technique relates to blast hole depth and is greater than 8m, adopt layered charge, powder charge interlayer is spaced apart 1.0 ~ 1.5m;
2. pre-ceasma charge constitution design: according to content of the present invention, as shown in Figure 4, pre-ceasma by choke material section (5), weaken powder charge section (9), normal charge section (10), strengthen powder charge section (11), non-electric ms detonator (7), primacord (8) form, apart from pre-ceasma powder charging bottom 1.0 ~ 1.5m place for strengthening powder charge section, filling distance is 0.5 ~ 1.0m, and below filling position, the position of 1.0m is for weakening powder charge section;
3. cushion hole charge constitution design: according to content of the present invention, as shown in Figure 5, cushion hole by hole section choke material section (5), normal charge section (10), strengthen powder charge section (11) form, non-electric ms detonator (7), primacord (8).Distance cushion hole powder charging bottom 1.0 ~ 1.5m place is for strengthening powder charge section, and nose end filling distance is 2.5 ~ 2.5m, and the filler distance strengthened between powder charge section and filling powder charge section is 1.0 ~ 1.5m, and normal charge length adjusts according to hole depth.
(4) blasting circuit and method of ignition design
1. design of firing circuit: small pit goaf adopts elementary errors between row, large dose adopts single hole elementary errors;
2. method of ignition design: use instant electric detonator to detonate non-electric net, detonating power supply uses rechargeable initiator.
The blasting circuit schematic diagram of this project as shown in Figure 6.
Claims (4)
1. a cutting excavation blasting procedure, is characterized in that it comprises the steps:
(1) blasting scheme is determined according to engineering fact;
(2) blast hole parameter setting;
(3) charge constitution design;
(4) blasting circuit and method of ignition design.
2. a kind of cutting excavation blasting procedure according to claim 1, is characterized in that described blast hole parameter setting meets:
1. during main blast hole blasting parameter setting: explosive specific charge q=0.6kg/m
3, two row's single holes strengthen powder charge unit consumption q=0.6kg/m before main blast hole single hole
3, rear row's single hole powder charge unit consumption q=0.5kg/m
3;
2. during pre-ceasma blasting parameter setting: normal reach degree of packing q=0.48kg/m, strengthening segment degree of packing q=0.6kg/m, the section of weakening degree of packing q=0.24kg/m;
3. during Buffer control setting parameter: bottom strengthening segment degree of packing q=0.6kg/m, middle part normal charge density q=1.6kg/m.
3. a kind of cutting excavation blasting procedure according to claim 1, is characterized in that described charge constitution design meets:
1. main blast hole charge constitution design: main blast hole is made up of choke material section and explosive filled section, wherein choke material segment length is 1.6m, and explosive filled section length should be greater than 5m, and described technique relates to blast hole depth and is greater than 8m, adopt layered charge, powder charge interlayer is spaced apart 1.0 ~ 1.5m;
2. pre-ceasma charge constitution design: pre-ceasma by choke material section, weaken powder charge section, normal charge section, strengthen powder charge section and form, apart from pre-ceasma powder charging bottom 1.0 ~ 1.5m place for strengthening powder charge section, filling distance is 0.5 ~ 1.0m, and below filling position, the position of 1.0m is for weakening powder charge section;
3. cushion hole charge constitution design: cushion hole is made up of hole section choke material section, normal charge section, choke material section, reinforcement powder charge section, distance cushion hole powder charging bottom 1.0 ~ 1.5m place is for strengthening powder charge section, nose end filling distance is 2.5 ~ 2.5m, the filler distance strengthened between powder charge section and filling powder charge section is 1.0 ~ 1.5m, and normal charge length adjusts according to hole depth.
4. a kind of cutting excavation blasting procedure according to claim 1, is characterized in that described blasting circuit and method of ignition design meet:
1. design of firing circuit: small pit goaf adopts elementary errors between row, large dose adopts single hole elementary errors, makes each big gun hole obtain the good side direction scope of freedom, reaches the object of control of flyrock;
2. method of ignition design: use instant electric detonator to detonate non-electric net, detonating power supply uses rechargeable initiator, to control the burst time accurately, guarantees that networking security is detonated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510758140.XA CN105466290A (en) | 2015-11-03 | 2015-11-03 | Cutting excavation blasting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510758140.XA CN105466290A (en) | 2015-11-03 | 2015-11-03 | Cutting excavation blasting method |
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| Publication Number | Publication Date |
|---|---|
| CN105466290A true CN105466290A (en) | 2016-04-06 |
Family
ID=55604252
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|---|---|---|---|
| CN201510758140.XA Pending CN105466290A (en) | 2015-11-03 | 2015-11-03 | Cutting excavation blasting method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063014A (en) * | 2017-05-23 | 2017-08-18 | 安徽江南***工程有限公司 | Cutting shallow hole step controlled blasting slope cutting method in complex environment |
| CN108801087A (en) * | 2018-05-07 | 2018-11-13 | 董武斌 | A kind of side slope pre split blasting method |
| CN109029172A (en) * | 2018-09-17 | 2018-12-18 | 福建省新华都工程有限责任公司 | A kind of near side (ns) slope control blasting method |
| CN109520381A (en) * | 2018-11-09 | 2019-03-26 | 北方***科技有限公司 | A kind of accurate delay explosion reduction blasting vibration method |
| CN110618249A (en) * | 2018-06-20 | 2019-12-27 | 核工业北京地质研究院 | Test method for geotechnical engineering excavation construction |
| CN110671983A (en) * | 2019-10-08 | 2020-01-10 | 中国葛洲坝集团易普力股份有限公司 | Presplitting blasting combined charging structure and method |
| CN110926287A (en) * | 2019-12-20 | 2020-03-27 | 深圳市蛇口招商港湾工程有限公司 | Cutting earth and rock excavation blasting method |
| CN114877765A (en) * | 2022-06-14 | 2022-08-09 | 保利长大工程有限公司 | Blasting control method for temporary traffic road section |
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| CN101441055A (en) * | 2008-12-31 | 2009-05-27 | 中煤平朔煤业有限责任公司 | Presplit blasting method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063014A (en) * | 2017-05-23 | 2017-08-18 | 安徽江南***工程有限公司 | Cutting shallow hole step controlled blasting slope cutting method in complex environment |
| CN107063014B (en) * | 2017-05-23 | 2018-11-20 | 安徽江南***工程有限公司 | Cutting shallow hole step controlled blasting slope cutting method in complex environment |
| CN108801087A (en) * | 2018-05-07 | 2018-11-13 | 董武斌 | A kind of side slope pre split blasting method |
| CN110618249A (en) * | 2018-06-20 | 2019-12-27 | 核工业北京地质研究院 | Test method for geotechnical engineering excavation construction |
| CN110618249B (en) * | 2018-06-20 | 2022-03-18 | 核工业北京地质研究院 | Test method for geotechnical engineering excavation construction |
| CN109029172A (en) * | 2018-09-17 | 2018-12-18 | 福建省新华都工程有限责任公司 | A kind of near side (ns) slope control blasting method |
| CN109520381A (en) * | 2018-11-09 | 2019-03-26 | 北方***科技有限公司 | A kind of accurate delay explosion reduction blasting vibration method |
| CN110671983A (en) * | 2019-10-08 | 2020-01-10 | 中国葛洲坝集团易普力股份有限公司 | Presplitting blasting combined charging structure and method |
| CN110926287A (en) * | 2019-12-20 | 2020-03-27 | 深圳市蛇口招商港湾工程有限公司 | Cutting earth and rock excavation blasting method |
| CN114877765A (en) * | 2022-06-14 | 2022-08-09 | 保利长大工程有限公司 | Blasting control method for temporary traffic road section |
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Application publication date: 20160406 |
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