CN112683117A - Construction method for slot-drawing blasting without well cutting - Google Patents
Construction method for slot-drawing blasting without well cutting Download PDFInfo
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Abstract
The application relates to a construction method for slot-drawing blasting without cutting a well, which comprises the following steps: s1, drilling medium-length holes by using a rock drill, and drilling the medium-length holes in rows, wherein the angles of the medium-length holes in each row are different according to the height of the mine room, and the specific range is 42-90 degrees; s2, arranging an initiating electronic detonator in each medium-deep hole, filling explosives in the medium-deep holes by adopting a non-coupling explosive filling method, and plugging the medium-deep holes; s3, networking the electronic detonators, and blasting stage by stage: blasting 1-3 rows of deep holes for the first time to form a blasting free surface; blasting for 4-6 rows for the second time to finish roof breaking of the chamber; and (5) blasting 7-10 rows of deep holes for the third time after slag discharging is finished, and finishing the slot drawing of the chamber. The beneficial effect of this application does: the tunnel is cut for the free space of one-time blasting by utilizing each subsection, the free space is gradually enlarged after slag is discharged by the subsection blasting, and the slot drawing of a chamber is completed, the well cutting is not needed to be processed, the construction difficulty and the construction cost can be reduced, and meanwhile, the construction safety is also improved.
Description
Technical Field
The application relates to the technical field of mine slot-drawing construction, in particular to a non-cutting slot-drawing blasting construction method.
Background
Before stoping of the mine chamber, a cutting groove is required to be constructed to provide free blasting space. In the prior art, a medium-length hole drilling machine is used for constructing a cutting well at a chamber section, and then a medium-hole well expanding slot is used for forming a free surface. The method has high construction cost and long construction period, and needs complex hole safety protection in underground cutting construction.
The conventional well cutting and broaching needs 4 expanded well holes of the medium-length hole, the broaching rows are 4 multiplied by 8 rows of 32, the angles of the medium-length hole are all 90 degrees, the length is 15 meters, and the total length of the medium-length hole is 540 meters. In the conventional well cutting and pulling groove, a well cutting with the diameter of 1.2 meters needs to be arranged in the middle of a mine cutting roadway.
However, the inventor finds that the construction of cutting and pulling the groove in the related art is more complicated and the construction cost is relatively high.
Disclosure of Invention
In order to reduce the construction difficulty and the construction cost of the pull groove, the application provides a no-cut-well pull groove blasting construction method.
The application provides a no cut well trombone slide blasting construction method, adopts following technical scheme:
a construction method of no-cut-well pull groove blasting comprises the following steps:
s1, drilling medium-length holes by using a rock drill, and drilling the medium-length holes in rows, wherein the angles of the medium-length holes in each row are different according to the height of the mine room, and the specific range is 42-90 degrees;
s2, arranging an initiating electronic detonator in each medium-deep hole, filling explosives in the medium-deep holes by adopting a non-coupling explosive filling method, and plugging the medium-deep holes;
s3, networking the electronic detonators, and blasting stage by stage: blasting 1-3 rows of deep holes for the first time to form a blasting free surface; blasting for 4-6 rows for the second time to finish roof breaking of the chamber; and (5) blasting 7-10 rows of deep holes for the third time after slag discharging is finished, and finishing the slot drawing of the chamber.
By adopting the technical scheme: the main part thinking changes originally and utilizes the cutting well to provide a blasting free space thinking, utilizes each segmentation to cut the lane and be a blasting free space, progressively enlarges free space after the fractional blasting slag tap and accomplishes the ore house trompil groove, need not to process and cuts the well, can reduce the construction degree of difficulty and construction cost.
Optionally, in step S1, the inclination angle of the deep holes in the first row is 42 to 46 °, the hole depth is 8 to 9m, the inclination angle of the central hole in the second row is 53 to 56 °, the hole depth is 10 to 12m, the inclination angle of the deep holes in the third row is 60 to 64 °, the hole depth is 14 to 16m, the inclination angle of the deep holes in the fourth row is 66 to 69 °, the hole depth is 14 to 16.5m, the inclination angle of the deep holes in the fifth row is 72 to 75 °, the hole depth is 13 to 16m, the inclination angle of the deep holes in the sixth row is 77 to 80 °, the hole depth is 13 to 15.5m, the inclination angle of the deep holes in the seventh row is 82 to 84 °, the hole depth is 13 to 15.5m, and the inclination angle of the deep holes in the 8 to 10 rows is 90 °, and the hole depth is.
By adopting the technical scheme: the processing of each medium-length hole is carried out according to the mine condition of difference, and whole medium-length hole is fan-shaped distribution, is convenient for carry out blasting construction one by one, explodes through stage by stage, has also removed the processing of cutting the well, has improved the efficiency of construction of trompil, has reduced construction cost.
Optionally, 3m of the deep holes in the first row are not filled with explosives, 5m of the deep holes in the second row are not filled with explosives, 6m of the deep holes in the third row are not filled with explosives, and 1m of the rest rows are not filled with explosives.
By adopting the technical scheme: according to the medium-length holes with different inclination angles, explosive is filled pertinently, and certain explosive usage amount can be saved.
Optionally, when the deep holes in 4-6 rows are blasted for the second time, an electronic detonator is respectively arranged at the hole bottom of the hole opening.
By adopting the technical scheme: through respectively installing an electronic detonator in drill way and hole bottom, can realize better blasting effect.
Optionally, an initiating explosive package is placed in the deep hole in the 7 th to 10 th rows, the initiating explosive package is tightly attached to the side wall of the medium-length hole, and the upper part of the initiating explosive package is filled with explosives.
By adopting the technical scheme: detonating the blasting cartridge bag through the electronic detonator, the blasting cartridge bag of packing is detonated to the blasting cartridge bag, and blasting cartridge bag adopts with elastic sack, installs electronic detonator and partial explosive in the sack inside, after the blasting cartridge bag reachs the assigned position of medium-depth hole, under the diffusion effect of the inside explosive of sack, can realize closely laminating of blasting cartridge bag and medium-depth hole inner wall, the later stage of being convenient for is filled the explosive
Optionally, a support frame is arranged at the bottom of the medium-length hole, and the initiating explosive is arranged on the support frame.
By adopting the technical scheme: after drilling, the support frame is placed to the bottom of the medium-length hole, and particularly for the medium-length hole with water, the support frame can support the initiating explosive bag.
Optionally, in step S3, before the electronic detonator is connected to the network, the explosion bus needs to be conducted and detected to ensure that the explosion bus is intact and usable, and the electronic detonator is connected to the explosion bus and is checked whether the connection is correct.
By adopting the technical scheme: the lead wires of the electronic detonators are connected to the blasting bus and are in a good conduction state, and one-time detonation is facilitated.
Optionally, the two-dimension code collector is adopted to collect the two-dimension code information on the electronic detonator jointing clamp according to the detonation sequence of the blasting design scheme, the actual use number of the construction site is checked after the collection is finished, the missing scanning is avoided, and then the collected two-dimension code information is guided into the controller to be subjected to password pre-detection.
By adopting the technical scheme: in the process, the detonation time of each electronic detonator is set simultaneously by identifying the two-dimensional code information, so that the electronic detonators can be controlled in a unified manner conveniently.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the tunnel is cut for the free space of one-time blasting by utilizing each subsection, the free space is gradually enlarged after slag is discharged by the subsection blasting, and the slot drawing of a chamber is completed, the well cutting is not needed to be processed, the construction difficulty and the construction cost can be reduced, and meanwhile, the construction safety is also improved.
Drawings
Fig. 1 is a schematic diagram of a medium-length hole arrangement structure according to an embodiment of the present application.
Fig. 2 is a schematic diagram of the internal structure of the medium-length hole in the embodiment of the application.
Reference number legend, 100, medium deep hole; 200. initiating explosive charges; 300. a support frame; 310. an upper bracket; 320. a support rod.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a construction method for slot-drawing blasting without cutting a well, which adopts the following technical scheme:
referring to fig. 1, a construction method for slot-drawing blasting without cutting a well comprises the following steps:
s1, drilling medium-length holes 100 by using a rock drill, drilling the medium-length holes 100 in rows, wherein the 100-degree angle of each row of the medium-length holes is different according to the height of the mine room, and the specific range is 42-90 degrees; the angles and depths of the deep holes 100 in each row are as follows: in the step S1, the inclination angle of the deep holes 100 in the first row is 42-46 degrees, the hole depth is 8-9m, the inclination angle of the central hole in the second row is 53-56 degrees, the hole depth is 10-12m, the inclination angle of the deep holes 100 in the third row is 60-64 degrees, the hole depth is 14-16m, the inclination angle of the deep holes 100 in the fourth row is 66-69 degrees, the hole depth is 14-16.5m, the inclination angle of the deep holes 100 in the fifth row is 72-75 degrees, the hole depth is 13-16m, the inclination angle of the deep holes 100 in the sixth row is 77-80 degrees, the hole depth is 13-15.5m, the inclination angle of the deep holes 100 in the seventh row is 82-84 degrees, the hole depth is 13-15.5m, and the inclination angle of the deep holes 100 in the 8-10 rows.
The medium-length holes 100 are machined according to different mine conditions, the whole medium-length holes 100 are distributed in a fan shape, blasting construction is convenient to carry out successively, and by blasting stage by stage, well cutting machining is omitted, construction efficiency of groove broaching is improved, and construction cost is reduced.
S2, arranging an initiating electronic detonator in each medium-length hole 100, filling explosives into the medium-length holes 100 by adopting a non-coupling explosive filling method, and plugging the medium-length holes 100;
s3, networking the electronic detonators, and blasting stage by stage: blasting 1-3 rows of deep holes 100 for the first time to form a blasting free surface; blasting 4-6 rows of deep holes 100 for the second time to finish roof breaking of the chamber; and (5) blasting 7-10 rows of deep holes 100 for the third time after slag discharging is finished, and finishing the slot drawing of the chamber.
The main part thinking of this embodiment changes originally and utilizes the cutting well to provide a blasting free space thinking, utilizes each segmentation to cut the lane and be a blasting free space, progressively enlarges free space behind the fractional blasting mucking and accomplishes the stope trompil, need not processing and cuts the well, can reduce the construction degree of difficulty and construction cost.
For example, a horizontal roof trommel at-170 m may employ a medium-length hole 100 with the following parameters, see table 1.
Table 1-170 m horizontal chamber slot-drawing parameter table
For example, at-185 m horizontal chamber pull grooves, medium-length holes can be used with the following parameters, see table 2.
Table 2-185 m horizontal chamber slot-drawing parameter table
In this embodiment, the deep holes 1003m in the first row are not filled with explosive, the deep holes 1005m in the second row are not filled with explosive, the deep holes 1006m in the third row are not filled with explosive, and the rest rows 1m are not filled with explosive. According to the medium-length holes 100 with different inclination angles, explosive is filled pertinently, and a certain amount of explosive can be saved.
In this embodiment, when the deep holes 100 in 4-6 rows are blasted for the second time, an electronic detonator is respectively arranged at the hole bottom of the hole opening. Through respectively installing an electronic detonator in drill way and hole bottom, can realize better blasting effect.
In this embodiment, the explosive charge 200 is placed in the deep hole 100 in the 7 th to 10 th rows, the explosive charge 200 is closely attached to the side wall of the deep hole 100, and the explosive charge 200 is filled in the upper portion thereof. The electronic detonator is used for detonating the initiating explosive package 200, the initiating explosive package 200 is used for detonating the filled explosive for blasting, the initiating explosive package 200 is an elastic bag, the electronic detonator and part of explosive are arranged in the bag, after the initiating explosive package 200 reaches the designated position of the medium-length hole 100, the closely attaching of the initiating explosive package 200 and the inner wall of the medium-length hole 100 can be realized under the diffusion action of the explosive in the bag, and the explosive can be filled in the later period conveniently.
Referring to fig. 2, in the present embodiment, a support 300 is provided at the bottom of the medium-length hole 100, and the initiating explosive cartridge 200 is disposed on the support 300. After drilling, the support 300 is lowered to the bottom of the medium-length hole 100, and particularly for the medium-length hole 100 with water, the support 300 can support the initiating explosive cartridge 200.
In this embodiment, in step S3, before the electronic detonator network is connected, the continuity of the blasting bus needs to be detected to ensure that the blasting bus is intact and usable, and the electronic detonator is connected to the blasting bus and is checked whether the connection is correct. The lead wires of the electronic detonators are connected to the blasting bus and are in a good conduction state, and one-time detonation is facilitated.
In this embodiment, a two-dimensional code collector is adopted to collect two-dimensional code information on an electronic detonator jointing clamp according to the detonation sequence of a blasting design scheme, the actual use number of a construction site is checked after the collection is finished, it is ensured that the scanning is not missed, and then the collected two-dimensional code information is guided into a controller for password pre-detection. In the process, the detonation time of each electronic detonator is set simultaneously by identifying the two-dimensional code information, so that the electronic detonators can be controlled in a unified manner conveniently.
This analysis is exemplified by a 10m wide, 15m tall drawing slot.
Mining accurate engineering cost analysis
1. The conventional well cutting and groove pulling needs 4 expanded holes of 100 medium-length holes, 4 groove pulling rows are multiplied by 8 rows of 32 medium-length holes, all the angles of 100 medium-length holes are 90 degrees, the length is 15 meters, and the total length of the medium-length holes is 100540 meters. No well cutting and groove pulling are needed to arrange three rows of medium-length holes 1007 of 42 degrees to 83 degrees and 100 rows of medium-length holes of 90 degrees, and medium-length holes are needed to be constructed with 100142.1 m/row x 5 rows =710.5 m.
2. In the conventional well cutting and pulling groove, a well cutting with the diameter of 1.2 meters needs to be arranged in the middle of a mine cutting roadway. The project payment is 2920 yuan/m 15m = 43800. No cut well pull groove does not need to arrange a chamber cut well.
And (3) blasting operation cost analysis:
1. the conventional well cutting slot drawing needs to enlarge the blasting three times, firstly 4 well mouth enlarging holes are blasted, then the slot drawing row is blasted twice, and three times of large blasting are carried out in total. According to the arrangement of the medium-length hole 100, the consumption of the slot-drawing explosive can be calculated. The bottom of the hole is removed according to the 540-meter medium-length hole 100, about 40 meters is not filled, and the explosive consumption is 3 kg/meter multiplied by 500 meters =1500 kg. The electronic detonator 36 emits detonating cord 500 meters.
2. And the drawing groove without cutting the well needs to be subjected to three times of blasting to form the drawing groove. Blasting for the first time to discharge 1-3 rows of deep holes 100 to form a blasting free surface; blasting for 4-6 rows for the second time to finish roof breaking of the chamber; and blasting for 4-10 rows for the third time to finish the slot drawing of the chamber.
And calculating the blasting charge according to the deep hole 100 in the chamber. The first row is not charged with 3 meters, the second row is not charged with 5 meters, and the third row is not charged with 6 meters, and the remaining blasting is not charged with 1 meter, and the number of the remaining blasting charges is calculated to be 105 meters. The blasting explosive consumption was 3 kg/m x 605 m =1815 kg.
In order to ensure the blasting effect, the second large blasting is that the hole bottom of the hole is respectively provided with an electronic detonator, and the other holes are filled with powder, so that the electronic detonator 65 is needed to be fired. The detonating tube is 710 meters.
Safety protection cost analysis:
1. after the conventional well cutting, groove drawing and well cutting construction is finished, protective walls need to be installed up and down on the cut well, the cost of the protective walls is 200 yuan, manual well expanding and filling needs to be conducted under the cut well, and the danger coefficient is large. When the pull groove rows are placed on two sides of the expanded wellhead, the powder needs to be charged nearby the expanded wellhead, and certain risks exist.
2. When no cut well broached groove blasting, several powder charges are all constructed under the supporting roadway, no blind well is needed in the early stage, special supporting is not needed, and the safety factor is higher.
And (3) analyzing economic feasibility:
1. cutting a well: no well cutting groove is formed, no well cutting is needed, and construction cost can be saved by 43800 Yuan.
2. And (3) constructing a medium-length hole 100: according to the design of the medium-length hole 100, more construction 710 and 540=170 meters are needed for the no-cutting pull groove, and more cost is 2000 yuan.
3. Blasting article loss:
viscous explosive: the well cutting-free pull groove needs to use more explosives 1815 and 1500=315kg, and costs more 2200 yuan.
Electronic detonator: no well cutting and groove pulling are needed, electronic detonators 65-36=29 are needed, and the cost is more than 700 yuan.
Detonating cord: the well cutting-free pull groove needs to use more detonating cords 710 and 500=210 meters, and the cost is more than 63 yuan.
4. Safety protection: no well cutting pull groove is needed, and the well cutting cost can be saved by 2000 Yuan.
To sum up: compared with the original mode, the 15-meter subsection non-cutting well broaching groove saves the cost by 41400 Yuan. The effects of reducing the construction difficulty and the construction cost are achieved, and the construction safety is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A construction method of no-cut-well pull groove blasting is characterized in that: the method comprises the following steps:
s1, drilling medium-length holes (100) by adopting a rock drill, drilling the medium-length holes (100) in rows, wherein the angles of the medium-length holes (100) in each row are different according to the height of the chamber, and the specific range is 42-90 degrees;
s2, arranging an initiating electronic detonator in each medium-length hole (100), filling explosives in the medium-length holes (100) by adopting a non-coupling explosive filling method, and plugging the medium-length holes (100);
s3, networking the electronic detonators, and blasting stage by stage: 1-3 rows of deep holes (100) are blasted for the first time to form a blasting free surface; blasting for 4-6 rows for the second time to finish roof breaking of the chamber; and (3) blasting 7-10 rows of deep holes (100) for the third time after the slag tapping is finished, and finishing the slot drawing of the chamber.
2. The construction method of no-cutting well and slot-drawing blasting according to claim 1, characterized in that: in the step S1, the inclination angle of the deep holes (100) in the first row is 42-46 degrees, the hole depth is 8-9m, the inclination angle of the central hole in the second row is 53-56 degrees, the hole depth is 10-12m, the inclination angle of the deep holes (100) in the third row is 60-64 degrees, the hole depth is 14-16m, the inclination angle of the deep holes (100) in the fourth row is 66-69 degrees, the hole depth is 14-16.5m, the inclination angle of the deep holes (100) in the fifth row is 72-75 degrees, the hole depth is 13-16m, the inclination angle of the deep holes (100) in the sixth row is 77-80 degrees, the hole depth is 13-15.5m, the inclination angle of the deep holes (100) in the seventh row is 82-84 degrees, the hole depth is 13-15.5m, and the inclination angle of the deep holes (100) in the 8-10 rows.
3. The construction method of no-cutting well and slot-drawing blasting according to claim 2, characterized in that: 3m of the deep holes (100) in the first row are not filled with explosive, 5m of the deep holes (100) in the second row are not filled with explosive, 6m of the deep holes (100) in the third row are not filled with explosive, and 1m of the rest rows are not filled with explosive.
4. The construction method of no-cutting well and slot-drawing blasting according to claim 1, characterized in that: and when the deep holes (100) in 4-6 rows are blasted for the second time, an electronic detonator is respectively arranged at the hole bottom of the hole opening.
5. The construction method of no-cutting well and slot-drawing blasting according to claim 1, characterized in that: and an initiating explosive bag (200) is placed in the deep hole (100) in the 7 th to 10 th rows, the initiating explosive bag (200) is tightly attached to the side wall of the medium-length hole (100), and the upper part of the initiating explosive bag (200) is filled with explosives.
6. The construction method of no-cutting-well slot-drawing blasting according to claim 5, characterized in that: the bottom of the medium-length hole (100) is provided with a support frame (300), and the initiating explosive package (200) is arranged on the support frame (300).
7. The construction method of no-cutting well and slot-drawing blasting according to claim 1, characterized in that: in step S3, the explosion bus needs to be conducted before connecting the electronic detonator networks, so as to ensure that the explosion bus is intact and usable, connect the electronic detonator to the explosion bus, and check whether the connection is correct.
8. The construction method of no-cutting-well slot-drawing blasting according to claim 7, characterized in that: the two-dimensional code collector is adopted to collect the two-dimensional code information on the electronic detonator jointing clamp according to the detonation sequence of the blasting design scheme, the actual use number of a construction site is checked after the collection is finished, the condition that the scanning is not missed is ensured, and then the collected two-dimensional code information is guided into the controller for password pre-detection.
9. The construction method of no-cutting-well slot-drawing blasting according to claim 6, characterized in that: the support frame (300) comprises an upper frame body and a support rod (320), wherein the upper frame body is connected to the upper end of the support rod (320).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114812313A (en) * | 2022-05-05 | 2022-07-29 | 河北钢铁集团矿业有限公司 | Application of blasting slot-drawing method in metal mine underground stope |
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