CN113686215B - Rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method - Google Patents
Rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method Download PDFInfo
- Publication number
- CN113686215B CN113686215B CN202111053610.4A CN202111053610A CN113686215B CN 113686215 B CN113686215 B CN 113686215B CN 202111053610 A CN202111053610 A CN 202111053610A CN 113686215 B CN113686215 B CN 113686215B
- Authority
- CN
- China
- Prior art keywords
- hole
- cut
- holes
- auxiliary
- main
- 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.)
- Active
Links
- 238000005422 blasting Methods 0.000 title claims abstract description 42
- 239000011435 rock Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000005641 tunneling Effects 0.000 claims abstract description 21
- 238000005474 detonation Methods 0.000 claims abstract description 12
- 230000003111 delayed effect Effects 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims description 11
- 230000035939 shock Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 12
- 238000009412 basement excavation Methods 0.000 description 8
- 125000004122 cyclic group Chemical group 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
-
- 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
- F42D1/05—Electric circuits for blasting
-
- 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
- F42D3/04—Particular applications of blasting techniques for rock blasting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention relates to a rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method, and belongs to the technical field of underground roadway tunneling blasting. According to the invention, a plurality of main cut holes and a plurality of auxiliary cut holes are designed and drilled according to a tunneling section; wherein the row spacing of the main cut holes is equal to the row spacing of the main cut holes, the auxiliary cut holes are positioned on the central axis of the adjacent row main cut holes and the auxiliary cut holes are positioned on the central axis of the adjacent row main cut holes; the aperture of the auxiliary cut hole is larger than that of the main cut hole, and the depth of the auxiliary cut hole is the same as that of the main cut hole; designing the charge amount in the main cut hole and the auxiliary cut hole, and charging the main cut hole and the auxiliary cut hole; designing the delayed detonation time of the digital electronic detonator, precisely controlling the auxiliary cut holes to detonate hole by hole to form cracks through the digital electronic detonator, and precisely controlling the main cut holes to detonate hole by hole in an aligned mode through the digital electronic detonator. The invention can improve the cutting blasting depth and the circulation footage.
Description
Technical Field
The invention relates to a rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method, and belongs to the technical field of underground roadway tunneling blasting.
Background
The roadway excavation occupies the main part of the underground mining excavation engineering quantity of the mine, and is a prior working procedure of the mine mining. At present, the tunnel burial depth of tunnel excavation in China gradually increases, the section area of tunnel excavation also gradually increases, but the cyclic footage of tunnel excavation is low, the average cyclic rate is about 75%, the monthly average cyclic footage is about 80m, and the requirements of the existing excavation workload cannot be met.
The method can be divided into the following three types according to the size of the tunneling section, and the section area is less than 10m2Is called a small-section excavation roadway, and the section area of the medium-section excavation roadway is 10m2～35m2The area of the large-section tunneling section is 35m2The above. For the tunneling roadways with different section areas, reasonable cut holes are sometimes needed to be designed during section blasting, and certain free surfaces and compensation spaces are provided for blasting of auxiliary holes and peripheral holes, so that the aim of reducing the rock clamping effect is fulfilled, and the final blasting effect is optimized. Therefore, the selection of the cutting mode, the mesh parameters of the cutting holes, the charging structure, the sequence of initiation, the length of stuffing, the delay time of initiation and other parameters are the key to the success of the cutting.
The existing large-diameter hollow hole vertical cut blasting method is only limited to the hollow hole part and cannot provide enough blasting compensation space, and the effect of the large-diameter hollow hole is not fully exerted; or the hole distribution mode can not meet the requirement of circulation footage.
Disclosure of Invention
Aiming at the limitation that the large-diameter hollow hole vertical cut blasting hollow hole part in the prior art cannot provide enough compensation space, the invention provides a rock lane large-diameter double-hollow hole charging accurate time-delay hole-by-hole vertical cut blasting method, namely, the cut blasting depth and the cyclic footage are improved by utilizing the hollow hole effect, and meanwhile, the damage effect of cut blasting vibration on surrounding rocks can be effectively reduced.
A rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method comprises the following specific steps:
(1) designing and drilling a plurality of main cut holes and a plurality of auxiliary cut holes according to a tunneling section; the main cut holes are positioned in the center of a tunneling section, the row spacing of the main cut holes is equal to the row spacing of the main cut holes, the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes, and the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes; the aperture of the auxiliary cut hole is larger than that of the main cut hole, and the depth of the auxiliary cut hole is the same as that of the main cut hole;
(2) designing the charge amount in the main cut hole and the auxiliary cut hole, and charging the main cut hole and the auxiliary cut hole;
(3) designing delayed detonation time of a digital electronic detonator, embedding the digital electronic detonator at the bottoms of the main cut hole and the auxiliary cut hole, accurately controlling the auxiliary cut hole to detonate hole by hole to form a crack through the digital electronic detonator, and accurately controlling the main cut hole to detonate hole by hole in a symmetrical manner through the digital electronic detonator;
the distance a between the adjacent main cut holes and the auxiliary cut holes in the step (1) is
In the formula: a is the distance between the adjacent main cut hole and the auxiliary cut hole, b is the proportional coefficient of tangential stress and radial stress, and St is the compressive strength of the rock; alpha is a decay index;
the depth of the main cut hole is
In the formula, L is the depth of a blast hole m; n is the number of rock drills on the same working face; p is the drilling quota (m/h) of the rock drill; t is the drilling time (h); n is the number of blast holes (one); theta is the average inclination angle (°) of the blast hole;
further, the attenuation index alpha is taken as
The shock wave zone takes "+" and the stress wave zone takes "-".
The loading Q in the main cut hole and the auxiliary cut hole in the step (2) is
In the formula: q is the single-hole loading (kg); l is the length (m) of the blast hole; l is a radical of an alcohol1Is the plug length (m); phi is rock breaking angle (degree);
determining the filling length (L) in terms of the line of least resistanced)：
L1＝(0.7～0.8)Wd
Wherein WdIs the minimum resistant wire length.
Further, the plugging length L1Is composed of
L1＝(0.3～0.5)L
In the formula: l is a radical of an alcohol1The length (m) of the plug, and L the length (m) of the blast hole.
The time of delaying the explosion of the digital electronic detonator in the step (3) is
In the formula: k is an integer, and the delay time is half of the vibration period.
The invention has the beneficial effects that:
(1) according to the invention, the bottom structure of the auxiliary cut hole, namely the large-diameter double-empty hole, is used for charging, so that the compensation space can be enlarged, the clamping effect of rocks is reduced, the cut blasting depth and the cyclic footage are improved, and meanwhile, the damage effect of cut blasting vibration on surrounding rocks can be effectively reduced;
(2) according to the invention, the auxiliary cut holes are detonated firstly, the main cut holes are detonated in a delayed manner, and the detonation of the auxiliary cut holes provides more free surfaces for the detonation of the main cut holes, so that the unit consumption of explosive is reduced, and the utilization rate of blast holes is increased;
(3) the invention adopts the digital electronic detonator to accurately control the blasting delay time of the main cut hole, thereby increasing the rock breaking effect and forming a good cut blasting effect;
(4) the unit consumption of the large-diameter double-empty-hole charging accurate delay hole-by-hole vertical cut blasting method is 1.71kg/m3The utilization rate of the blast hole is 95.1 percent, the unit consumption of explosive is reduced, and the utilization rate of the blast hole is improved.
(5) By carrying out on-site optimization tests, the area of the orifice of the slotted cavity of the cut is 2.01m2The volume of the groove cavity is 5.565m3Compared with the common tunneling blasting, the large-diameter double-empty-hole charging accurate time-delay hole-by-hole vertical cut blasting method has the advantages that the blasting effect is obviously improved, and the single consumption of explosive is reduced compared with the common tunneling blasting;
(6) the large-diameter double-hollow-hole charging accurate time-delay hole-by-hole vertical cut blasting method can obtain a better cut blasting effect in mine roadway tunneling blasting, and brings better economic benefit to mines.
Drawings
FIG. 1 is a diagram of a large-diameter double-hollow-hole charging precise time-delay cut blasting position;
fig. 2 is a schematic view of arrangement of main cut holes and auxiliary cut holes;
fig. 3 is a schematic diagram of charging in the main cut hole and the auxiliary cut hole.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.
Example 1: a rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method comprises the following specific steps:
(1) designing and drilling a plurality of main cut holes and a plurality of auxiliary cut holes according to a tunneling section (see figure 1); the main cut holes are positioned in the center of a tunneling section, the row spacing of the main cut holes is equal to the row spacing of the main cut holes, the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes, and the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes; the aperture of the auxiliary cut hole is larger than that of the main cut hole, and the depth of the auxiliary cut hole is the same as that of the main cut hole;
the auxiliary cut hole spacing is determined by numerical simulation;
the distance a between the adjacent main cut holes and the auxiliary cut holes is
In the formula: a is the distance between the adjacent main cut hole and the auxiliary cut hole, b is the proportional coefficient of tangential stress and radial stress, and St is the compressive strength of the rock; alpha is a decay index;
the depth of the main cut hole is
In the formula, L is the depth of a blast hole, m; n is the number of rock drills on the same working face; p is the drilling quota (m/h) of the rock drill; t is the drilling time (h); n is the number of blast holes (one); theta is the average inclination angle (°) of the blast hole;
the attenuation index alpha takes the value of
Taking a plus sign in a shock wave area and taking a minus sign in a stress wave area;
(2) designing the charge amount in the main cut hole and the auxiliary cut hole, and charging the main cut hole and the auxiliary cut hole (see figure 3);
the dosage Q in the main cut hole and the auxiliary cut hole is as follows
In the formula: q is the single-hole loading (kg); l is the length (m) of the blast hole; l is a radical of an alcohol1Is the plug length (m); phi is rock breaking angle (DEG);
determining the length (L) of the pad as the line of least resistanced)：
L1＝(0.7～0.8)Wd
Wherein WdIs the minimum resistant wire length;
length of blockage L1Is composed of
L1＝(0.3～0.5)L
In the formula: l is a radical of an alcohol1The length (m) of the blockage is L, and the length (m) of the blast hole is L;
(3) designing the delayed detonation time of a digital electronic detonator, embedding the digital electronic detonator at the bottoms of the main cut hole and the auxiliary cut hole, accurately controlling the auxiliary cut hole to detonate hole by hole to form cracks through the digital electronic detonator, and accurately controlling the main cut hole to detonate hole by hole in a symmetrical manner through the digital electronic detonator (see figure 2); wherein 1, 2, 3, 4 in fig. 2 represent the sequence of initiation;
wherein the delay time of the digital electronic detonator is
In the formula: k is an integer, and the delay time is half of the vibration period.
Example 2: made of jadeFor example, the tunnel vertical deep hole tunneling blasting engineering of the middle section 285 of the Dahongshan copper mine in the stream mining industry is that the size of the section of the tunnel is 4.4 multiplied by 3.7m2
A rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method comprises the following specific steps:
(1) designing and drilling a plurality of main cut holes and a plurality of auxiliary cut holes according to the tunneling section (see fig. 1 and 2); the main cut holes are positioned in the center of a tunneling section, the row spacing of the main cut holes is equal to the row spacing of the main cut holes, the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes, and the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes; the aperture of the auxiliary cut hole is larger than that of the main cut hole, and the depth of the auxiliary cut hole is the same as that of the main cut hole;
8 main cut holes and 2 auxiliary cut holes are drilled by a Huatai mining metallurgy HT81A type hydraulic tunneling rock drilling trolley used on a tunneling operation surface, the diameter of each auxiliary hole is 100mm, the diameter of each main cut hole is 50mm, the depth of each blast hole is 3200mm, and the distance between blast holes of each cut is 35 cm;
(2) designing the charge amount in the main cut hole and the auxiliary cut hole, and charging the main cut hole and the auxiliary cut hole (see figure 3); the single-hole loading of the main cut hole is 3.3kg, and the single-hole loading of the auxiliary hole is 2.1-2.4 kg;
(3) designing delayed detonation time of a digital electronic detonator, embedding the digital electronic detonator at the bottoms of the main cut hole and the auxiliary cut hole, accurately controlling the auxiliary cut hole to detonate hole by hole to form a crack through the digital electronic detonator, and accurately controlling the main cut hole to detonate hole by hole in a symmetrical manner through the digital electronic detonator; the delay time is half of the vibration period, and the wave crest and the wave trough are completely counteracted (see figure 2);
in fig. 2, 1, 2, 3 and 4 represent the detonation sequence, 1 represents 0ms detonation, 2 represents 25ms detonation, 3 represents 50ms detonation, and 4 represents 75ms detonation, so that the delay time is accurately controlled;
the conventional auxiliary cut holes are not filled with the powder,the actual specific charge of the cut area is 1.99kg/m after conversion3(ii) a In the embodiment, the unit consumption of the large-diameter double-empty-hole charging accurate delay hole-by-hole vertical cut blasting method is 1.71kg.m-3The blast hole utilization rate is 97%, the large-diameter double-empty-hole charging accurate time-delay hole-by-hole vertical cutting blasting method reduces the explosive unit consumption, improves the blast hole utilization rate, can obtain better cutting blasting effect in mine roadway tunneling blasting, and brings better economic benefit to mines.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (5)
1. A rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method is characterized by comprising the following specific steps:
(1) designing and drilling a plurality of main cut holes and a plurality of auxiliary cut holes according to a tunneling section; the main cut holes are positioned in the center of a tunneling section, the row spacing of the main cut holes is equal to the row spacing of the main cut holes, the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes, and the auxiliary cut holes are positioned on the central axis of the adjacent rows of main cut holes; the aperture of the auxiliary cut hole is larger than that of the main cut hole, and the depth of the auxiliary cut hole is the same as that of the main cut hole;
(2) designing the charge amount in the main cut hole and the auxiliary cut hole, and charging the main cut hole and the auxiliary cut hole;
(3) designing delayed detonation time of a digital electronic detonator, embedding the digital electronic detonator at the bottoms of the main cut hole and the auxiliary cut hole, accurately controlling the auxiliary cut hole to detonate hole by hole to form a crack through the digital electronic detonator, and accurately controlling the main cut hole to detonate hole by hole in a symmetrical manner through the digital electronic detonator;
the time of delayed explosion of the digital electronic detonator is
In the formula: k is an integer, and the delay time is half of the vibration period.
2. The rock roadway large-diameter double-hole charging precise delay hole-by-hole vertical cut blasting method according to claim 1, characterized in that: the distance a between the adjacent main cut holes and auxiliary cut holes in the step (1) is
In the formula: a is the distance between adjacent main cut holes and auxiliary cut holes, b is the proportionality coefficient of tangential stress and radial stress, stThe compressive strength of the rock; alpha is a decay index;
the depth of the main cut hole is
Wherein L is the depth of a blast hole (m); n is the number of rock drills on the same working face; p is the drilling quota (m/h) of the rock drill; t is the drilling time (h); n is the number of blast holes (one); θ is the average inclination angle (°) of the blast hole.
3. The rock roadway large-diameter double-hole charging accurate delay hole-by-hole vertical cut blasting method according to claim 2, characterized in that: the attenuation index alpha takes the value of
The shock wave zone takes "+" and the stress wave zone takes "-".
4. The rock roadway large-diameter double-hole charging accurate delay hole-by-hole vertical cut blasting method according to claim 2, characterized in that: step (2) the medicine quantity Q in the main cut hole and the auxiliary cut hole is as follows
In the formula: q is the single-hole loading (kg); l is the depth (m) of the blast hole; l is1A plug length (m); phi is rock breaking angle (DEG);
determining the filling length (L) in terms of the line of least resistance1)：
L1＝(0.7～0.8)Wd
Wherein WdIs the minimum resistant wire length.
5. The rock roadway large-diameter double-hole charging precise delay hole-by-hole vertical cut blasting method according to claim 4, characterized in that: length of blockage L1Is composed of
L1＝(0.3～0.5)L
In the formula: l is1The length (m) of the blockage, and L the depth (m) of the blast hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053610.4A CN113686215B (en) | 2021-09-09 | 2021-09-09 | Rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053610.4A CN113686215B (en) | 2021-09-09 | 2021-09-09 | Rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113686215A CN113686215A (en) | 2021-11-23 |
| CN113686215B true CN113686215B (en) | 2022-06-21 |
Family
ID=78586167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111053610.4A Active CN113686215B (en) | 2021-09-09 | 2021-09-09 | Rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113686215B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200437B (en) * | 2022-07-11 | 2023-09-26 | 中国矿业大学(北京) | Double large diameter hollow hole bottom energy collecting and cutting blasting method |
| CN115468464B (en) * | 2022-09-08 | 2023-11-03 | 北京科技大学 | Deep metal mine full-section deep hole blasting method based on accurate time delay of electronic detonator |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104101270A (en) * | 2014-07-08 | 2014-10-15 | 华侨大学 | Medium-length hole blasting and cutting method in underground construction |
| CN104180729A (en) * | 2014-08-20 | 2014-12-03 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Method for arrangement of blast holes of driving working face of driving trolley and detonator grading |
| CN104196537A (en) * | 2014-08-26 | 2014-12-10 | 广东省建筑工程机械施工有限公司 | Construction method of three parallel metro tunnels with ultra-small clear distance |
| CN204788093U (en) * | 2015-06-17 | 2015-11-18 | 中铁二十二局集团第一工程有限公司 | Shallow blasting system of burying undercut tunnel vibration in control city |
| CN105222660A (en) * | 2015-08-21 | 2016-01-06 | 成都理工大学 | A kind of High-geotemperature tunnel cooling presplit blasting method |
| CN110030888A (en) * | 2019-04-17 | 2019-07-19 | 中国人民解放军军事科学院国防工程研究院 | The steel for shot method of deep hole subregion triangulation network slotting shaft formatting by one blasting engineering method |
| CN111664761A (en) * | 2020-05-08 | 2020-09-15 | 安徽理工大学 | Cut blasting method based on pre-blasting |
| CN112161534A (en) * | 2020-10-16 | 2021-01-01 | 重庆大学 | One-step mining control blasting method for mine underground upward access |
| CN113188388A (en) * | 2021-05-21 | 2021-07-30 | 核工业南京建设集团有限公司 | In-hole delay sectional detonating cut structure and method |
-
2021
- 2021-09-09 CN CN202111053610.4A patent/CN113686215B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104101270A (en) * | 2014-07-08 | 2014-10-15 | 华侨大学 | Medium-length hole blasting and cutting method in underground construction |
| CN104180729A (en) * | 2014-08-20 | 2014-12-03 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Method for arrangement of blast holes of driving working face of driving trolley and detonator grading |
| CN104196537A (en) * | 2014-08-26 | 2014-12-10 | 广东省建筑工程机械施工有限公司 | Construction method of three parallel metro tunnels with ultra-small clear distance |
| CN204788093U (en) * | 2015-06-17 | 2015-11-18 | 中铁二十二局集团第一工程有限公司 | Shallow blasting system of burying undercut tunnel vibration in control city |
| CN105222660A (en) * | 2015-08-21 | 2016-01-06 | 成都理工大学 | A kind of High-geotemperature tunnel cooling presplit blasting method |
| CN110030888A (en) * | 2019-04-17 | 2019-07-19 | 中国人民解放军军事科学院国防工程研究院 | The steel for shot method of deep hole subregion triangulation network slotting shaft formatting by one blasting engineering method |
| CN111664761A (en) * | 2020-05-08 | 2020-09-15 | 安徽理工大学 | Cut blasting method based on pre-blasting |
| CN112161534A (en) * | 2020-10-16 | 2021-01-01 | 重庆大学 | One-step mining control blasting method for mine underground upward access |
| CN113188388A (en) * | 2021-05-21 | 2021-07-30 | 核工业南京建设集团有限公司 | In-hole delay sectional detonating cut structure and method |
Non-Patent Citations (3)
| Title |
|---|
| "硬岩巷道掘进深孔直眼掏槽爆破试验与应用研究";国志雨;《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅰ辑》;20190515;第2.2.2-2.3.3小节 * |
| 含夹矸层半煤岩巷现场爆破试验研究;孙强等;《煤炭科学技术》;20031225(第12期);44-48 * |
| 复式正方形直孔掏槽爆破技术在用沙坝矿的应用;余家龙;《现代矿业》;20170425(第04期);91-94 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113686215A (en) | 2021-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110779403B (en) | Hole-by-hole initiation and presplitting blasting crack forming method for open deep hole step presplitting hole under complex environment | |
| CN113686215B (en) | Rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method | |
| CN102587916B (en) | A kind of ore caving afterwards filling mining methods | |
| CN106767212B (en) | A kind of two-region undercut blast hole arrangement and its explosion well completion method of application | |
| CN105333778A (en) | Medium-deep hole large-section composite cut blasting structure and method | |
| CN111256549B (en) | Rock drift deep hole multiple wedge straight hole internal segmentation differential cut blasting method | |
| CN103306679A (en) | '|'-shaped free surface holing one-step well completion technology | |
| CN102230768A (en) | High-efficiency inclined shaft tunneling blasting method for red clay | |
| CN112161534B (en) | One-step mining control blasting method for mine underground upward access | |
| CN105466290A (en) | Cutting excavation blasting method | |
| CN104406470A (en) | Deep-hole slotting blasting method for large-diameter freezing shaft in west cretaceous system soft rock area | |
| CN110260735A (en) | A kind of diamond shape major diameter emptying aperture burn cut structure and lane construction technique | |
| CN110879027A (en) | Efficient energy-gathered blasting rapid tunneling method for half coal rock roadway | |
| CN210486685U (en) | Rhombus major diameter hole straight hole undercut structure | |
| CN106440981A (en) | Deep hole blasting method for increasing bulky productivity of joint fracture developed granite mine | |
| CN108915694A (en) | It the step tunneling boring unprotect layer tight-face blasting of tunnel lower layer and repairs the roads and protects logical construction method | |
| CN114485304A (en) | Simple light explosion drilling and charging method for medium-hard rock | |
| CN110940242A (en) | Blasting excavation method for deep crack containing slope rock mass | |
| CN111220036B (en) | Blasting method for pilot tunnel at lower section of vertical shaft water curtain roadway | |
| CN104790950A (en) | Optimized mining middle-deep blasthole millisecond blasting slot cutting method | |
| CN112211639A (en) | One-step well completion method for high-depth large-section medium-deep hole | |
| CN112964143A (en) | Three-time blasting method for hollow hole straight-hole cut | |
| CN113108660A (en) | Tunnel contour fine control blasting method under bedding development condition | |
| SU1263868A1 (en) | Method of controlling the strained state of rock about mine working | |
| CN110645854B (en) | Pre-splitting blast hole for arranging initial mining hard roof of fully mechanized mining face and online detonating method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |