CN1434191A - Bore construction method by bore explosion - Google Patents
Bore construction method by bore explosion Download PDFInfo
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- CN1434191A CN1434191A CN 02100620 CN02100620A CN1434191A CN 1434191 A CN1434191 A CN 1434191A CN 02100620 CN02100620 CN 02100620 CN 02100620 A CN02100620 A CN 02100620A CN 1434191 A CN1434191 A CN 1434191A
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Abstract
The present invention provides a deep shaft one-step explosion well-forming construction method, and it is characterized by that three types of blast-holes can be drilled on the full face of the deep shaft, first type is of rock presplitting holes which are distributed along periphery of circular well to make peripheral smoothwall blasting, second type is of rock breaking holes which are distributed on the inner side of peripheral presplitting holes, and third type is of pulverizing holes with are distributed in the axis zone of shaft. The presplitting hole adopts non-coupled air column spaced charging powder, and the breaking hole and pulverizing hole adopt conventional non-coupled continuously-charging powder.
Description
Technical field
Bore construction method by bore explosion of the present invention belongs to the shaft excavation technical field.
Background technology
Shaft sinking is a ring the most difficult in the underground engineering construction.Adopting blasting technique is one of primary condition that improves the vertical shaft progress, and the deep hole blasting job practices is a lot.Bibliographical information is also more.For example, Changsha Mine Inst's Kunming rock soil demolition meeting paper is entitled as [vertical shaft deep hole blasting] (seeing the collection GF06924 of China National Defence Science Technology Information Centre); One piece of article that oil cellar engineering company of Ministry of Petroleum Industry 1981 delivers, be entitled as [vertical shaft deep hole segmentation smooth blasting method--in the oil cellar application in engineering] (seeing the collection GF39234 of China National Defence Science Technology Information Centre).How traditional shaft excavation use descending construction method, i.e. boring from top to bottom, explosion, discharge fume, get rid of the danger, muck removal, finishing, supporting, measurement etc., circulation is so repeatedly excavated downwards gradually.Use this job practices, because of underground work faciostenosis, the difficulty of ventilating, lifting is frequent, operating condition is very abominable, work efficiency is very low, when meeting falling object or plate indicates nature of danger, underground operators is hidden nowhere, so excavating shaft in fragmented rock body belongs to one of operation that labour intensity is big, the safety difficulty ensures.Because the Sidewall Surrounding Rock condition of clamping down on determines, the driving of descending construction method, no matter adopt cone cut method or bench blasting method, required explosive specific charge amount is usually all at 3.0kg/m
3More than.From the test driving, see: the explosion of this explosive payload, more serious to country rock damage disturbance, under the situation of rock, make the borehole wall often occur backbreaking or the phenomenon of caving in than fragmentation, bring many difficulties for follow-up construction.In addition, the repetition blast disturbance in the circulation driving also can not be ignored near the cumulative effect of tunnel country rock, and it can cause broken rock mass further loosening, and the tunnel supporting and protection structure that already is under the effect of country rock complex stress is made the matter worse.The quick-fried operation of the brill of this job practices also is subjected to the restriction of the age of concrete of supporting in the last circulation, causes the construction period lengthening, is difficult to satisfy the progress demand of vertical shaft construction.Another kind of traditional excavation method of vertical shaft is up construction method, it be by cage or job platform from bottom to top carry out tunneling construction.This job practices, except that muck removal in the artificial well, it all possesses the shortcoming of descending construction method, and danger is bigger.So have only the big deep-well construction more than hundred meters to use it sometimes, be of little use generally speaking.
In addition, also have full section boring, well decking, employing multistage detonator are retreated the delay blasting method.The charge collocation of this job practices, cut apart and stop up segment length and require very strictly, blasting circuit is very complicated, and the constructor is difficult to grasp.It is improper that operation has slightly, in retreating up delay blasting process, " half-cooked " phenomenon in the middle of very easily occurring, and after the big gun that detonates, also usually because of miss-fired by squeeze and destroy, this has increased difficulty and danger all for quick-fried post processing.This method is on catalase theoretical foundation; the explosive funnel smashing principle of not throwing off livingston; it also is that dosage consumption is big, the cartridge bag of demolition effect difference is used for fractured rock separately, to protection adjoining rock stability, guarantees that safe construction does not have much effects.
In sum, existing shaft construction method is difficult to satisfy requirement of engineering.
Summary of the invention
The objective of the invention is to propose a kind of new bore construction method by bore explosion, the feature of bore construction method by bore explosion is: adopt three types of shot holes of cloth brill on the full section of deep shaft, the first kind is the pre-ceasma of rock, cloth is on circular well peripheral profile line, pre-ceasma aperture 70mm, 8～9 times of apertures of pitch-row, linear charging density 0.5kg/m, second class is the catalase hole, cloth is in the pre-ceasma inboard of well periphery, apart from well periphery 1000～1500mm, aperture 100mm, pitch-row 600～1000mm, linear charging density 2.25kg/m, the 3rd class is that rock is pulverized the hole, cloth is drilled in vertical shaft axle center district, aperture 100mm, linear charging density 2.25kg/m, pitch-row ≯ 300mm, pulverize the width 600～1000mm between hole and the broken hole, pre-ceasma, gambling is sealed with timber wedge and stemming in broken hole and pulverizing lower end, hole, pre-ceasma adopts the air column spaced loading that is not coupled, the conventional continuous charging that is not coupled is adopted in broken hole and pulverizing hole, pre-ceasma, gambling is sealed with stemming in the upper end after broken hole and the pulverizing hole powder charge, the configuration of detonating of two blasting circuits of two instantaneous caps and detonating fuse is all adopted in each medicine hole, powder charge hole and the emptying aperture of pulverizing the hole adopt alternate configuration, and the explosion of powder charge hole is free face with the emptying aperture, and emptying aperture is 1: 1 with the ratio of powder charge hole sectional area, the hole is pulverized in powder charge, and to adopt coupling value not be 1.7～1.9 charge constitution, pulverize district's emptying aperture and powder charge pore volume sum 〉=real rock mass and amass 20%, whole explosion adopts the pre-ceasma of time-delay 25～50ms earlier quick-fried, and broken hole and pulverizing hole are follow-up with two sections quick-fried elementary errors millisecond detonators.
The advantage of bore construction method by bore explosion of the present invention is into well depth in boring allows degree of skewness, not limited by the depth.Form precracking at the well periphery after the explosion, form the rock rupture zone between the peripheral and broken hole, pulverize and form the catalase district between hole and the broken hole, form rock near the borehole axis and pulverize the district, thereby realize deep-well onepull Cheng Jing, and can the heavy damage borehole wall, can form good well chamber, for follow-up support work provides desirable operating environment; Particularly for being communicated with the deep shaft in tunnel up and down, can realize directly slagging tap from following tunnel, it is nearly more than 8 times to make programming improve; Carry out wave absorption with the rupture zone that explosion forms, solved the problem that insoluble dose is big in the explosion, seismic wave is strong; Adopt emptying aperture to make the explosion free face, for full well depth continuous charging, onepull become well to create necessary condition, also make the explosion burden reach minimum degree, emptying aperture and powder charge sum that the hole takes up space 〉=real rock mass of pulverizing the district amass 20%, have solved explosion secondary diagenesis problem.
Description of drawings
Cloth hole, Fig. 1 deep-well of the present invention cross section schematic diagram;
Fig. 2 deep-well of the present invention vertical section powder charge schematic diagram;
Fig. 3 deep-well perimeter hole of the present invention powder charge schematic diagram.
The specific embodiment
Be described in detail as follows to bore construction method by bore explosion of the present invention in conjunction with the accompanying drawings and embodiments: the dark 26.5m that desires to dig a well has between the different entry of two elevations and must be communicated with vertical shaft.The vertical shaft plane cross section is circular, diameter 5.50m, and dark 26.50m, total excavated volume is 629.30m
3Whole vertical shaft all is in the sandstone, and the rock mass bedding is grown, and weathering is serious, Protodyakonov coefficient f=7～9.According to execution conditions, borehole charge of the full well depth of full section is adopted in design, with two sections detonators, 50ms carries out short-delay blasting by time-delay, first presplitting periphery, pulverizing simultaneously again, the broken and interior rock mass of be full of cracks well, and make the landing automatically of quick-fried quarrel, promptly overall plan adopts onepull to become the deep-well construction method.After quick-fried, from the following quick-fried quarrel of tunnel shipping, and, the borehole wall carried out brushing from top to bottom and spray supporting with the anchor net by the quarrel face that falls gradually in the well with dirt loader.
The design of big gun hole
Press the strict control of hole scattering rate≤0.5%.The big gun hole is arranged shown in figure one.
1). hole 1 is the pre-ceasma of vertical shaft periphery, totally 28.Aperture 70mm, pitch-row 0.62m, hole depth 26.50m.Each hole is evenly arranged on the outline line of vertical shaft periphery.
2). hole 2 and totally 9 in hole 3, the rock mass that is arranged in vertical shaft center 0.6m * 0.6m is pulverized in the district.Aperture 100mm, big gun hole pitch-row and array pitch are 0.3m, hole depth 26.50m.Its mesopore 2 totally 5, plays pulverization to well heart rock mass for pulverizing the hole.Hole 3 is an emptying aperture, and totally 4, it provides free face for hole 2 explosions, and for avoiding quick-fried back secondary diagenesis that the expansion space is provided.The space sum that it is provided with coupling charging hole not is greater than pulverizing 20% of district's rock mass.
3). hole 4 is broken and the be full of cracks hole, totally 8, aperture 100mm, hole depth 26.50m, pitch-row 1.02m.It and hole 2 distance≤1m with hole 2 actings in conjunction, are pulverizing the outer formation in district fracture area.Hole 4 is 1.45m with the distance in hole 1, can guarantee that the rock mass between the two forms the rupture zone.
Explosive payload design and charge constitution
The charge constitution in each hole is seen figure two, figure three.Design is intended with No. 2 rock dynamites.
1). the air column powder charge at interval that is not coupled is adopted in hole 1, and linear charging density is 0.50kg/m, and the coefficient of coup is not 2.70.Processing is bundled in the interval of No. 2 rock ammonium nitrate powder sticks of 150 grams by 0.10m on the galvanized wire 9 during cartridge bag, will tie the powder stick 8 of getting well with 1 common detonating fuse 11 and be together in series, and hangs that design attitude gets final product in the big gun hole.Detonating with 21 section non-electric ms detonator 7 in every hole, draws outside the aperture with detonator 5, and a mouthful foreign minister is not less than 5m, and the bottom is filled in the gambling of nylon rope 10 dead-wood wedges earlier in 1 lower end, hole, again big gun hole upper and lower side gambled 1m with stemming 6 each envelope.
2). for simplifying construction, being convenient to operation, the linear charging density of pulverizing district's cartridge bag and fracture area cartridge bag adopts 2.25kg/m without exception.During the processing cartridge bag, the powder stick of 3 150 grams behind the sheave, can be put into the big gun hole continuously with each bundle explosive and is got final product side by side.Whole blast hole projectile filling is run through with 1 common detonating fuse 11 in each big gun hole, and detonates with 23 sections non-electric ms detonator, and gambling is sealed with hole 1 in two ends about in the of 2 in broken hole 4, pulverizing hole.
Blasting circuit connects and firing order
1). blasting circuit connects: will draw each the hole detonator outside the aperture, and adopt " tackling all problems at once " to tie into 4 bundles by nearby principle, wherein two bundles are each 20, and two bundles are each 21 in addition.The instant electric detonator of two series connection is set in every bundle.After the electric cap series connection with four bundles, be connected on the main line that detonates, in igniting station detonator detonates.
2). firing order: detonated at 0 second in hole 1, and hole 2, hole 4 time-delay 50ms detonate simultaneously.
The bore construction method by bore explosion demolition effect and the superiority thereof of present embodiment.
The bore construction method by bore explosion of present embodiment, after the explosion, Sidewall Surrounding Rock is stable, and the section moulding is regular, and borehole wall brushing amount is less, only＜45 ° explosive funnel occurs in the section of well head and shaft bottom＜1m, causes on a small quantity and backbreaks.A little micro-cracks appears in the concrete spraying support in vertical shaft edge 20m, and the injection coagulation scholar in the 10m has on a small quantity to be fallen by shake, and tunnel country rock preexisting crack is expanded to some extent near the well head, but does not influence the stability of tunnel country rock and supporting and protection structure.After with sprayed mortar well head being repaired, all safe zero defects in the whole construction course.
The bore construction method by bore explosion of present embodiment, make free face with emptying aperture, cloth hole, powder charge, detonation mode and explosion burden have been changed, with the acting in conjunction of full hole depth continuous charging and the interaction fractured rock between each big gun, make blasting energy be utilized more rationally, more abundant, thereby reduced explosive consumption in a large number, taked high spectrum energy, presplitting, be full of cracks etc. to reduce the measure of earthquake in addition, improved the shaft excavation quality.After quick-fried, because of quick-fried quarrel is supported in the well, the borehole wall phenomenon of can not caving in.When following tunnel dress is cut, carry out the brushing supporting in the face of vertical shaft by the quarrel that falls gradually in the well.The all multiple operation that saved cycle operation, created necessary condition to borehole charge outside well with machinery dress quarrel, workload more than 80% is not be used in the well carries out, thereby operating personnel's labour intensity and construction danger have been reduced significantly, manpower and construction equipment have been saved in a large number, construction costs reduces, and construction speed has improved nearly 8 times.
Second embodiment of bore construction method by bore explosion of the present invention is the vertical shaft construction of diameter 1.9m, dark 16.8m, this embodiment pulverizes Kong Xuanwu, blasthole diameter 100mm, pitch-row 300mm, wherein, four in powder charge hole, one of emptying aperture, emptying aperture cloth is in the middle of four medicine holes, other and first embodiment is similar substantially, no longer repeats.
Claims (1)
- A kind of bore construction method by bore explosion, it is characterized in that: adopt three types of shot holes of cloth brill on the full section of deep shaft, the first kind is the pre-ceasma of rock, cloth is on circular well peripheral profile line, pre-ceasma aperture 70mm, 8～9 times of apertures of pitch-row, linear charging density 0.5kg/m, second class is the catalase hole, cloth is in the pre-ceasma inboard of well periphery, apart from well periphery 1000～1500mm, aperture 100mm, pitch-row 600～1000mm, linear charging density 2.25kg/m, the 3rd class is that rock is pulverized the hole, cloth is drilled in vertical shaft axle center district, aperture 100mm, linear charging density 2.25kg/m, pitch-row ≯ 300mm, pulverize the width 600～1000mm between hole and the broken hole, pre-ceasma, gambling is sealed with timber wedge and stemming in broken hole and pulverizing lower end, hole, pre-ceasma adopts the air column spaced loading that is not coupled, the conventional continuous charging that is not coupled is adopted in broken hole and pulverizing hole, pre-ceasma, gambling is sealed with stemming in the upper end after broken hole and the pulverizing hole powder charge, the configuration of detonating of two blasting circuits of two instantaneous caps and detonating fuse is all adopted in each medicine hole, powder charge hole and the emptying aperture of pulverizing the hole adopt alternate configuration, and the explosion of powder charge hole is free face with the emptying aperture, and emptying aperture is 1: 1 with the ratio of powder charge hole sectional area, the hole is pulverized in powder charge, and to adopt coupling value not be 1.7～1.9 charge constitution, pulverize district's emptying aperture and powder charge pore volume sum 〉=real rock mass and amass 20%, whole explosion adopts the pre-ceasma of time-delay 25～50ms earlier quick-fried, and broken hole and pulverizing hole are follow-up with two sections quick-fried elementary errors millisecond detonators.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100620 CN1434191A (en) | 2002-01-25 | 2002-01-25 | Bore construction method by bore explosion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100620 CN1434191A (en) | 2002-01-25 | 2002-01-25 | Bore construction method by bore explosion |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434653C (en) * | 2006-07-28 | 2008-11-19 | 辽河石油勘探局 | Blasting type cave well completion technological method of coal layer gas well |
| CN101799261A (en) * | 2010-03-26 | 2010-08-11 | 重庆钢铁(集团)有限责任公司 | Hole distributing and blasting method of foundation pit excavation |
| CN101806066A (en) * | 2010-03-26 | 2010-08-18 | 重庆钢铁(集团)有限责任公司 | Method for molding vertical wall of deep foundation pit |
| CN101261104B (en) * | 2008-04-17 | 2011-01-05 | 中国矿业大学(北京) | Crack rock laneway molding control method |
| CN102519326A (en) * | 2011-12-30 | 2012-06-27 | 大同煤矿集团有限责任公司 | Coal mine dish region under-belt bottom lifting control blasting method |
| CN101266123B (en) * | 2007-03-15 | 2012-07-04 | 鞍钢集团矿业公司 | Crushing station pit digging method |
| CN102620614A (en) * | 2012-04-19 | 2012-08-01 | 中铁二局股份有限公司 | Construction method for cave depot slag funnel |
| CN103046869A (en) * | 2013-01-21 | 2013-04-17 | 葛洲坝集团第二工程有限公司 | Construction method for controlling drilling positions to penetrate through guide rock strata |
| CN103557757A (en) * | 2013-11-11 | 2014-02-05 | 中南大学 | Testing method for determining slotted hole charging gap length and blocking length |
| CN103758524A (en) * | 2013-12-30 | 2014-04-30 | 安徽水安建设集团股份有限公司 | Stage blasting tunneling vertical shaft construction method |
| CN103940309A (en) * | 2014-03-26 | 2014-07-23 | 南京梅山冶金发展有限公司 | Underground-blasting shaft forming method |
| CN104819670A (en) * | 2015-05-19 | 2015-08-05 | 重庆交通建设(集团)有限责任公司 | Pre-drilling mesopore shaft excavation blasting method |
| CN105674816A (en) * | 2016-01-22 | 2016-06-15 | 河北钢铁集团矿业有限公司 | Medium-length hole blasting one-time shaft-forming method used for non-coal mine mountain |
| CN106352749A (en) * | 2016-11-08 | 2017-01-25 | 中钢集团马鞍山矿山研究院有限公司 | Drivage peripheral hole homoenergetic blasting method |
| CN107339920A (en) * | 2017-09-06 | 2017-11-10 | 中钢集团马鞍山矿山研究院有限公司 | The method of superdeep holes presplit blasting |
| CN108278939A (en) * | 2018-01-25 | 2018-07-13 | 安徽理工大学 | A kind of blasting method for reducing rock convergence measure and reducing blasting vibration |
| CN108708730A (en) * | 2018-05-31 | 2018-10-26 | 安徽理工大学 | A kind of weak bonding, more crack rich water rock gangways preset edge hole smooth surface forming technique |
| CN110360906A (en) * | 2019-07-29 | 2019-10-22 | 华侨大学 | A kind of structure and method in the elevator region to be blasted for reducing ground vibration |
| CN110671981A (en) * | 2019-10-10 | 2020-01-10 | 昆明理工大学 | Smooth blasting method for vertical shaft tunneling in high stress environment |
| CN111594174A (en) * | 2020-05-08 | 2020-08-28 | 中电建十一局工程有限公司 | Full-section one-time pore-forming segmented blasting vertical shaft excavation method |
| CN111912306A (en) * | 2019-05-09 | 2020-11-10 | 西南科技大学 | Method for improving smooth blasting effect of tunnel |
| CN111998742A (en) * | 2020-08-13 | 2020-11-27 | 中国人民解放军空军工程大学 | Construction method for forming deep well through one-time blasting |
| CN112729028A (en) * | 2020-12-18 | 2021-04-30 | 中铁十六局集团有限公司 | Peripheral hole charging initiation method for tunnel blasting |
-
2002
- 2002-01-25 CN CN 02100620 patent/CN1434191A/en active Pending
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434653C (en) * | 2006-07-28 | 2008-11-19 | 辽河石油勘探局 | Blasting type cave well completion technological method of coal layer gas well |
| CN101266123B (en) * | 2007-03-15 | 2012-07-04 | 鞍钢集团矿业公司 | Crushing station pit digging method |
| CN101261104B (en) * | 2008-04-17 | 2011-01-05 | 中国矿业大学(北京) | Crack rock laneway molding control method |
| CN101799261A (en) * | 2010-03-26 | 2010-08-11 | 重庆钢铁(集团)有限责任公司 | Hole distributing and blasting method of foundation pit excavation |
| CN101806066A (en) * | 2010-03-26 | 2010-08-18 | 重庆钢铁(集团)有限责任公司 | Method for molding vertical wall of deep foundation pit |
| CN101806066B (en) * | 2010-03-26 | 2011-07-27 | 重庆钢铁(集团)有限责任公司 | Method for molding vertical wall of deep foundation pit |
| CN101799261B (en) * | 2010-03-26 | 2011-12-28 | 重庆钢铁(集团)有限责任公司 | Hole distributing and blasting method of foundation pit excavation |
| CN102519326A (en) * | 2011-12-30 | 2012-06-27 | 大同煤矿集团有限责任公司 | Coal mine dish region under-belt bottom lifting control blasting method |
| CN102620614B (en) * | 2012-04-19 | 2015-08-19 | 中铁二局股份有限公司 | Cave depot is slagged tap the construction method of funnel |
| CN102620614A (en) * | 2012-04-19 | 2012-08-01 | 中铁二局股份有限公司 | Construction method for cave depot slag funnel |
| CN103046869B (en) * | 2013-01-21 | 2015-10-14 | 中国葛洲坝集团第二工程有限公司 | Pass through the construction method of guiding CONTROL OF STRATA MOVEMENT bore direction |
| CN103046869A (en) * | 2013-01-21 | 2013-04-17 | 葛洲坝集团第二工程有限公司 | Construction method for controlling drilling positions to penetrate through guide rock strata |
| CN103557757B (en) * | 2013-11-11 | 2015-11-18 | 中南大学 | Determine the test method of keyhole powder charge gap length and stemming length |
| CN103557757A (en) * | 2013-11-11 | 2014-02-05 | 中南大学 | Testing method for determining slotted hole charging gap length and blocking length |
| CN103758524B (en) * | 2013-12-30 | 2016-06-29 | 安徽水安建设集团股份有限公司 | A kind of segment blast driving shaft construction method |
| CN103758524A (en) * | 2013-12-30 | 2014-04-30 | 安徽水安建设集团股份有限公司 | Stage blasting tunneling vertical shaft construction method |
| CN103940309B (en) * | 2014-03-26 | 2015-09-23 | 南京梅山冶金发展有限公司 | A kind of method of underground blasting Cheng Jing |
| CN103940309A (en) * | 2014-03-26 | 2014-07-23 | 南京梅山冶金发展有限公司 | Underground-blasting shaft forming method |
| CN104819670A (en) * | 2015-05-19 | 2015-08-05 | 重庆交通建设(集团)有限责任公司 | Pre-drilling mesopore shaft excavation blasting method |
| CN105674816A (en) * | 2016-01-22 | 2016-06-15 | 河北钢铁集团矿业有限公司 | Medium-length hole blasting one-time shaft-forming method used for non-coal mine mountain |
| CN106352749A (en) * | 2016-11-08 | 2017-01-25 | 中钢集团马鞍山矿山研究院有限公司 | Drivage peripheral hole homoenergetic blasting method |
| CN107339920A (en) * | 2017-09-06 | 2017-11-10 | 中钢集团马鞍山矿山研究院有限公司 | The method of superdeep holes presplit blasting |
| CN107339920B (en) * | 2017-09-06 | 2019-01-18 | 中钢集团马鞍山矿山研究院有限公司 | The method of superdeep holes presplit blasting |
| CN108278939B (en) * | 2018-01-25 | 2019-11-05 | 安徽理工大学 | A kind of blasting method for reducing rock convergence measure and reducing blasting vibration |
| CN108278939A (en) * | 2018-01-25 | 2018-07-13 | 安徽理工大学 | A kind of blasting method for reducing rock convergence measure and reducing blasting vibration |
| CN108708730A (en) * | 2018-05-31 | 2018-10-26 | 安徽理工大学 | A kind of weak bonding, more crack rich water rock gangways preset edge hole smooth surface forming technique |
| CN108708730B (en) * | 2018-05-31 | 2019-12-03 | 安徽理工大学 | The weak bonding of one kind, more crack rich water rock gangways preset the molding method of edge hole smooth surface |
| CN111912306A (en) * | 2019-05-09 | 2020-11-10 | 西南科技大学 | Method for improving smooth blasting effect of tunnel |
| CN111912306B (en) * | 2019-05-09 | 2023-09-19 | 西南科技大学 | Method for improving tunnel smooth blasting effect |
| CN110360906A (en) * | 2019-07-29 | 2019-10-22 | 华侨大学 | A kind of structure and method in the elevator region to be blasted for reducing ground vibration |
| CN110671981A (en) * | 2019-10-10 | 2020-01-10 | 昆明理工大学 | Smooth blasting method for vertical shaft tunneling in high stress environment |
| CN110671981B (en) * | 2019-10-10 | 2021-09-21 | 昆明理工大学 | Smooth blasting method for vertical shaft tunneling in high stress environment |
| CN111594174A (en) * | 2020-05-08 | 2020-08-28 | 中电建十一局工程有限公司 | Full-section one-time pore-forming segmented blasting vertical shaft excavation method |
| CN111998742A (en) * | 2020-08-13 | 2020-11-27 | 中国人民解放军空军工程大学 | Construction method for forming deep well through one-time blasting |
| CN112729028A (en) * | 2020-12-18 | 2021-04-30 | 中铁十六局集团有限公司 | Peripheral hole charging initiation method for tunnel blasting |
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