CN220288443U - Goaf filling well blasting structure - Google Patents
Goaf filling well blasting structure Download PDFInfo
- Publication number
- CN220288443U CN220288443U CN202322062446.4U CN202322062446U CN220288443U CN 220288443 U CN220288443 U CN 220288443U CN 202322062446 U CN202322062446 U CN 202322062446U CN 220288443 U CN220288443 U CN 220288443U
- Authority
- CN
- China
- Prior art keywords
- blasting
- holes
- goaf
- hole
- drilling
- 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 130
- 238000005553 drilling Methods 0.000 claims abstract description 54
- 239000011435 rock Substances 0.000 claims abstract description 42
- 239000002360 explosive Substances 0.000 claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000004880 explosion Methods 0.000 claims description 36
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000005065 mining Methods 0.000 claims description 11
- 210000003462 vein Anatomy 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 239000004575 stone Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model provides a goaf filling well blasting structure, which comprises a pulse-following roadway and a rock drilling route above a goaf top plate of a stope, and further comprises the goaf at the lower part of the rock drilling route, wherein the goaf takes the position of a last row of sector medium-length holes as the goaf boundary of the stope, the goaf top plate of the stope is provided with a blasting zone along the goaf boundary of the stope, and the blasting zone is consistent with the goaf top plate of the stope in height; the blasting area comprises a blasting drilling hole and a plurality of empty holes which are arranged around the blasting drilling hole in parallel with the blasting drilling hole, the blasting drilling hole is obliquely arranged and filled with stemming and explosive, and the empty holes are not filled with the explosive. The utility model utilizes the mechanism of blast holes and empty Kong Poyan, reduces the blasting well-forming engineering quantity and the specific explosive consumption, reduces the production cost, simultaneously reduces the development of a crushing area and a crack area, reduces the disturbance to the surrounding rock of the top plate near the filling well, and improves the well-forming quality.
Description
Technical Field
The utility model belongs to the field of mining engineering, relates to a filling well blasting structure, and in particular relates to a goaf filling well blasting structure.
Background
The underground mining of the metal mine inevitably forms a goaf, and the goaf is formed to redistribute the stress of the rock mass in a certain range around the goaf, so that the rock is deformed, moved and destroyed, and the earth surface is collapsed. Meanwhile, untreated goafs are also very easy to cause large-area collapse accidents under the influence of blasting vibration of other underground operation areas, and great potential safety hazards are brought to deep mining of mines; in order to reduce the subsidence of the earth surface, slow down the movement and development of underground surrounding rock, prevent the large-area ground pressure movement and avoid the goaf from collapsing, and the goaf must be treated. The paste filling method is a goaf treatment method which is widely applied at present, and a filling hole or a filling well needs to be constructed before the goaf is filled.
In order to reduce the filling cost, the filling materials are mainly composite filling materials such as cement, tailings, broken stone, waste stone, water and the like; for the two-step goaf, the filling material can greatly improve the proportion of tailings, broken stone and waste stone in order to further reduce the filling cost. At the moment, the small pore diameter of the filling hole is limited, the hole is easy to collapse under the influence of scouring and blasting vibration, the pore wall is easy to solidify under the influence of filling slurry, the defects of pore diameter reduction and the like are further developed, and if the conditions of hole blocking, hole collapse and the like occur, the filling progress is seriously influenced; and the filling cost can be obviously increased by reducing the proportion of tailings, broken stone and waste stone. Large-aperture punching equipment capable of meeting filling requirements is not common in some mines, and because the operation is complex, fewer technicians capable of skilled operation are required, and the cost of enterprises is further increased by introducing matched equipment and personnel. The larger dead weight of the mine body can also cause certain influence on construction safety, and particularly, the mine body broken stope goaf roof can cause larger potential safety hazard.
The filling well has the advantages of flexible size specification, small influence by well blockage and well collapse and the like, and can effectively avoid the defects that the filling hole is easy to block, collapse, limited in filling amount and the like; however, the method has the defects of large manual tunneling construction work amount, high cost, poor labor operation environment, certain safety risk and the like.
At present, a small number of mines also use blasting well formation technology, and a plurality of blasting holes such as cut holes, auxiliary holes, peripheral holes and the like are mostly adopted, or a plurality of blasting holes such as spiral cut forms and the like are not fully utilized by a blasting rock breaking mechanism and a compensation space theory, so that the blasting engineering quantity is large, the specific explosive consumption is higher, a well wall crushing area and a crack area develop after blasting well formation, and a better well formation effect is often not achieved.
Disclosure of Invention
In view of the above, the present utility model aims to provide a goaf filling well blasting structure, which uses fewer blastholes and empty Kong Poyan mechanisms to avoid the problems of hole blocking, hole collapse, small filling amount, etc., improve the well forming operation environment, reduce the blasting well forming engineering amount and the specific explosive consumption, reduce the production cost, and improve the well forming quality.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the blasting structure for the goaf filling well comprises a pulse-following roadway and a rock drilling route above a goaf top plate of a stope, and further comprises the goaf at the lower part of the rock drilling route, wherein the goaf takes the position of the last row of fan-shaped medium-deep holes as the goaf boundary, the goaf top plate of the stope is provided with a blasting zone along the goaf boundary, and the overall height of the blasting zone is consistent with the height of the goaf top plate of the stope;
the blasting area comprises a blasting drilling hole and a plurality of empty holes which are arranged around the blasting drilling hole in parallel with the blasting drilling hole, the blasting drilling hole is obliquely arranged and filled with stemming and explosive, and the empty holes are not filled with explosive.
Further, the blast hole depth is the same as the hole depth of the empty hole.
Furthermore, the number of the holes is six, the holes are arranged at the periphery of the blasting drilling hole in a regular hexagon mode, and the hole distances between the blasting drilling hole and the hole and between the hole and the hole are the same.
Specifically, the aperture, the inclination angle and the azimuth angle of the blasting drilling hole and the hollow hole are kept consistent.
Further, the arrangement of the empty holes and the blasting holes meets the blasting rock breaking mechanism and the compensation space theory:
S pre-explosion rock-falling body ·K≤S Compensation space +S Pre-explosion rock-falling body (1)
Wherein S is Compensation space The compensation space area provided for blasting holes 10 and holes 11 is S Pre-explosion rock-falling body The area of the pre-burst rock mass between the burst drilling 10 and the empty hole 11 drilling is K, and the loosening coefficient of the mine burst rock mass.
Further, when the through holes of the drill holes are blasted, stemming is filled in the bottoms and the orifices of the holes, and the filling length is smaller than the minimum resistance line.
Furthermore, the hole bottom stemming, the granular ammonium nitrate explosive, the emulsified ammonium nitrate explosive and the hole mouth stemming are filled in the blasting borehole from bottom to top in a segmented mode, and the emulsified ammonium nitrate explosive is internally provided with an explosion-guiding electric detonator, and the explosion-guiding cable penetrates through the hole bottom stemming and the granular ammonium nitrate explosive and is connected with the explosion-guiding electric detonator.
The beneficial effects of the utility model are as follows:
according to the utility model, by utilizing a blasting rock breaking mechanism and a compensation space theory, fewer blasting holes are designed at safe positions of the boundary of a goaf, a proper hole distribution mode is selected, a free surface is provided for blasting stress wave reflection of the blasting holes, a tension and compression force concentration effect of the holes is utilized, space is provided for further expansion of broken rock, and finally blasting is completed;
by adopting the novel blasting structure, the problems of hole blocking, hole collapse, small filling amount and the like caused by filling holes are effectively avoided, the filling proportion requirements of tailings, broken stones and waste stones and the labor operation environment of manual tunneling well formation are reduced, the engineering amount and the specific explosive consumption of well formation methods such as cut blasting, spiral cut blasting and the like adopted at present are reduced, the production cost can be effectively reduced, the development of crushing areas and crack areas is reduced, the disturbance to the surrounding rock of the top plate of the filling well accessory is reduced, and the well formation quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a plan view of stope roof roadway layout and stope goaf boundaries to be filled;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a plan view of a blast borehole and a hole borehole in an annular arrangement in a goaf roof roadway arrangement in a stope;
FIG. 4 is an enlarged view of a portion of the blast borehole and void arrangement of FIG. 3;
FIG. 5 is a section B-B of FIG. 3;
FIG. 6 is a cross-sectional view of the blasting borehole charge C-C of FIG. 5;
FIG. 7 is a diagram showing a process of breaking rock mass between a blasted borehole and a void by the combined action of blasted stress waves and blasted gas;
FIG. 8 is a cross-sectional view of a fill well formed after blasting is completed;
the reference numerals are as follows: 1. along pulse drift, 2, rock drilling route, 3, stope goaf boundary, 4, stope boundary, 5, ore body, 6, stope goaf surrounding rock, 7, stope goaf, 8, stope goaf roof, 9, azimuth, 10, blasting drilling, 11, hole, 12, detonating cord, 13, hole bottom stemming, 14, orifice stemming, 15, explosion conducting electric detonator, 16, emulsified ammonium nitrate explosive, 17, granular ammonium nitrate explosive, 18, stress wave, 19, explosion gas, 20, cavity, 21, broken ore, 22 and filling well after blasting.
Detailed Description
Specific examples are given below to further clarify, complete and detailed description of the technical scheme of the utility model. The present embodiment is a preferred embodiment based on the technical solution of the present utility model, but the scope of the present utility model is not limited to the following embodiments.
In the stope boundary 4, a goaf filling well blasting structure according to the utility model is shown in fig. 1-3, and comprises a pulse-following roadway 1 and a rock drilling access 2 (which can also be a filling connecting channel or a temporary abandoned roadway) above a stope goaf roof 8, and further comprises a stope goaf 7 arranged at the lower part of the rock drilling access 2, wherein a stope goaf 7 is surrounded by a ore body 5 and a stope goaf surrounding rock 6, the stope goaf 7 takes the position of a last row of forward-facing upward sector medium-deep holes as a stope goaf boundary 3 (namely, the position of the stope goaf surrounding rock 6 and the stope goaf boundary 3), the stope roof 8 is provided with a blasting zone along the stope goaf boundary 3, and the blasting zone height is consistent with the stope goaf roof 8, so that a filling well is formed by blasting to realize the communication with the goaf;
the blasting area comprises a blasting drilling hole 10 and a plurality of empty holes 11 which are uniformly and equidistantly arranged around the blasting drilling hole 10, the blasting drilling hole 10 is filled with stemming and explosive, and the empty holes 11 are not filled with explosive. The structures of the single blasting drilling hole 10 and the plurality of hollow holes 11 reduce the engineering quantity and the specific explosive consumption, can effectively reduce the production cost, reduce the development of a crushing area and a crack area, lighten the disturbance to the top plate surrounding rock 6 of the filling well accessory and improve the well quality.
Further, the orifice is positioned outside the stope boundary 4 and is kept at a certain safety distance, and the bottom of the orifice extends to the inside of the stope empty zone 7, so that the cemented filling material can be injected into the stope empty zone 7.
Further, the hole depth of the blasting drillings 10 is the same as the hole depth of the empty holes 11. The expansion space of broken rock can penetrate through the formation well to ensure the blasting quality, and the first blasting area forms enough cavities 20 to provide enough blasting space and free surface for subsequent blasting.
Further, six holes 11 are arranged around the blasting holes 10 in a regular hexagonal shape as shown in fig. 4; to blast the drill holes 10B 1 Centered, hollow 11K 1 -K 6 Around blasting borehole 10B 1 Evenly distributed at equal intervals.
Further, as shown in fig. 5, the hole distances between the blasting holes 10 and the hollow holes 11 and between the hollow holes 11 and the hollow holes 11 are the same; as shown in the figure, the distance between the blasting holes 10B1 and any one hole 11Kn (n=1-6) is equal to the distance between any two adjacent holes 11; the blasting energy is ensured to be dispersed more uniformly, the boundary of the filling well is affected uniformly, and the well forming effect is better.
Further, the blast borehole 10 is consistent with the hole diameter, inclination angle and azimuth angle 9 of the hole 11. The stress wave 18 diffuses to the hollow hole 11 during explosion, so that the explosion energy is more uniformly and effectively dispersed, and the explosion effect is ensured.
Further, the arrangement of the hole 11 and the blasting borehole 10 satisfies the blasting rock breaking mechanism and the compensation space theory:
S pre-explosion rock-falling body ·K≤S Compensation space +S Pre-explosion rock-falling body (1)
Wherein S is Compensation space The compensation space area provided for blasting holes 10 and holes 11 is S Pre-explosion rock-falling body The area of the pre-burst rock mass between the burst drilling 10 and the empty hole 11 drilling is K, and the loosening coefficient of the mine burst rock mass.
Further, when the through holes of the drill hole 10 are blasted, the bottom and the orifice of the hole are filled with stemming, and the filling length is smaller than the minimum resistance line.
When the explosion drill hole 10 is not provided with a through hole or the hole is blocked due to explosion, the hole is filled with stemming, the filling length is smaller than the minimum resistance line, the effective explosion of the explosive is ensured, and the explosion effect is further ensured.
Further, as shown in fig. 6, the hole bottom stemming 13 and the hole mouth stemming 14 are arranged at the upper end and the lower end of the blasting borehole 10, the blasting borehole 10 is filled with the granular ammonium nitrate explosive 17 and the emulsified ammonium nitrate explosive 16 from bottom to top, the emulsified ammonium nitrate explosive 16 is internally provided with the explosion conductive detonator 15, and the explosion conductive cable 12 penetrates through the hole bottom stemming 13 and the granular ammonium nitrate explosive 17 and is connected with the explosion conductive detonator 15. The effect of bottom-up explosion can be achieved after the bottom-up explosion, well shape is facilitated, the granular ammonium nitrate explosive 17 is detonated and the explosion electric detonator is detonated upwards along the detonating cord 12, so that the emulsified ammonium nitrate explosive 16 is started, then rock mass between the explosion drilling hole 10 and the hollow hole 11 is crushed under the combined action of the reflected stress wave 18 and the explosion gas 19, the crushed rock is thrown down to the stope hollow area 7, a cavity 20 is formed, and a free surface and a compensation space are provided for the subsequent blasthole explosion until the explosion process is completed.
Alternatively, the minimum resistance line is 20-30 times the hole diameter of the blasted borehole 10.
In other embodiments, the inclination angle of the blast borehole 10 may be adjusted in accordance with the work equipment.
The blasting well forming method by using the goaf filling well blasting structure comprises the following steps:
s1) measuring goaf boundaries: and marking the goaf boundary according to the last row of the medium-length holes before the medium-length holes in the lower stope are subjected to front-row blasting stoping, as shown in figure 1.
S2) designing a drilling blast borehole 10: according to the position of the goaf boundary, designing a goaf roof 8 of the stope to be provided with a blasting zone along the goaf boundary 3 of the stope, and constructing the position of a blasting drilling hole 10 in a safe area;
in this embodiment, according to the performance parameters of the drilling machine, the drilling construction position and the roof thickness, the drilling diameter is 130mm, the inclination angle is 65 °, the azimuth angle 9 is 237 ° and the drilling depth is 8m.
S3) designing the empty holes 11 to form a blasting area: the main function of the hole 11 is to provide a free surface for the reflection of the blasting stress wave 18 of the blasting hole 10 according to the blasting rock breaking mechanism and the compensation space theory; at the same time, the pulling pressure concentration effect of the hollow holes 11 is utilized and space is provided for further expansion of broken rock;
in this embodiment, the diameter of the holes 11 is 130mm the same as that of the blasting holes 10, the inclination angle is 65 °, the azimuth angle 9 is 237 °, the number of the holes 11 is six according to the diameter of the holes 11, the well forming specification of the filling well (the diameter is 720mm here) and the compensation space theory, the holes 11 are arranged on the periphery of the blasting holes 10 in a regular hexagon shape, the hole distance between the blasting holes 10 and the holes 11 is 360mm, and the hole distance between the holes 11 is 360mm, as shown in fig. 4.
S4) verifying whether the filling well specification can meet the requirement according to the explosion compensation space theory and the explosion rock mass loosening coefficient, wherein the specific verification process is as follows:
the loose coefficient of the rock mass of mine blasting is counted according to actual blasting, and 1.30 is taken here;
the calculated drilling areas of the blasting drilling holes 10 and the hollow holes 11 are 13266.5mm 2 ；
The area of the pre-burst rock mass between the burst drilling 10 and the hollow 11 is 296080.5mm 2 ；
The blasting holes 10 and the hollow holes 11 provide compensating space areas of 92865.5mm 2 ；
According to the explosion compensation space theory, the area is brought into a formula (1);
296080.5×1.30mm 2 ＝384904.65mm 2 ≤(296080.5+92865.5)mm 2 ＝388946mm 2
through verification, the values meet the explosion compensation space theory and the well forming specification requirement of the filling well.
S5) construction drilling: the drilling construction procedure is arranged before or after the stope blasting, and drilling is constructed on the stope goaf top plate 8 along the stope goaf boundary 3 according to the designed drilling positions and parameters of the blasting holes 10 and the holes 11; in the construction process, the technical parameters such as drilling point position, deflection rate, hole depth and the like are controlled.
S5) blasting borehole 10 charges: after the construction is completed, the drilled holes which are completed after the construction are protected, and after the medium-length holes are positively arranged to complete blasting, explosive is installed in the blasting drilled holes 10, and the rest of the empty holes 11 are not charged.
The minimum resistance line is 20 times of the hole diameter of the drill hole, stemming is filled at the bottom and the hole opening of the blasting drill hole 10, and the filling length is 1.0m and is smaller than the minimum resistance line; the specific explosive consumption is 0.7kg/t, uncoupled charge is adopted, the charge length is 6.0m, the linear charge density is 0.75kg/m, and the total charge quantity is 4.5kg.
The blasthole 10 aperture is chosen in this example to have a minimum resistance line of 20 times.
S6) drilling and blasting: as shown in fig. 7, the detonation method adopts reverse blasting, and after the completion of the charging of the blasting borehole 10, each blasting safety measure is confirmed to be implemented, the blasting borehole 10 is detonated. The rock mass between the blasthole 10 and the hole 11 is broken by the combined action of the reflected stress wave 18 and the blasted gas 19, as shown in fig. 8, broken ore 21 is thrown down to the stope goaf 7 to form a cavity 20, which provides free surface and compensation space for subsequent blasthole blasting until the blasting process is completed, forming a blasted filling well 22.
S8) checking the blasting well completion effect: and after the blasting is finished, confirming site safety according to requirements, and checking the blasting well completion effect.
In summary, according to the goaf filling well blasting structure disclosed by the utility model, the blasting drill hole 10 and the holes 11 are designed at the safe positions of the goaf boundary, the explosion-guiding electric detonator 15 is arranged at the upper end of the blasting drill hole 10, a free surface is provided for reflection of blasting stress waves 18 of the blasting drill hole 10, the tension and compression force concentration effect of the holes 11 is utilized, meanwhile, space is provided for further expansion of broken rocks, the blasting well completion is realized, the engineering quantity and the specific explosive consumption are reduced, the production cost can be effectively reduced, the disturbance to the top plate surrounding rock 6 of the filling well accessory is reduced, and the well completion quality is improved.
The foregoing has outlined and described the features, principles, and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are merely illustrative of the principles of the present utility model, and that various changes and modifications may be made in the utility model without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a goaf filling well blasting structure, includes along vein gallery (1) and rock drilling route (2) more than goaf roof (8), its characterized in that: the mining method comprises the steps that a mining field empty area (7) is arranged at the lower part of a rock drilling access way (2), the mining field empty area (7) takes the position of the last row of fan-shaped medium deep holes as a mining field empty area boundary (3), a mining field empty area top plate (8) is arranged along the mining field empty area boundary (3), and the overall height of the mining field empty area is consistent with that of the mining field empty area top plate (8); the blasting area comprises a blasting drilling hole (10) and a plurality of empty holes (11) which are arranged around the blasting drilling hole (10) in parallel, wherein the blasting drilling hole is obliquely arranged and filled with stemming and explosive, and the empty holes (11) are not filled with explosive.
2. A goaf-filled well blasting structure as recited in claim 1, wherein: the hole depth of the blasting drilling hole (10) is the same as the hole depth of the empty hole (11).
3. A goaf-filled well blasting structure as claimed in claim 2, wherein: the number of the holes (11) is six, the holes are arranged at the periphery of the blasting drilling hole (10) in a regular hexagon mode, and the hole distances between the blasting drilling hole (10) and the holes (11) and between the holes (11) are the same.
4. A goaf-filled well blasting structure as recited in claim 1, wherein: the diameter, the inclination angle and the azimuth angle (9) of the blasting drilling holes (10) and the hollow holes (11) are consistent.
5. A goaf-filled well blasting structure as recited in claim 1, wherein: the arrangement of the empty holes (11) and the blasting holes (10) meets the blasting rock breaking mechanism and the compensation space theory:
S pre-explosion rock-falling body ·K≤S Compensation space +S Pre-explosion rock-falling body
Wherein S is Compensation space Compensating space area, S, provided for blasting holes (10) and blank holes (11) drilling Pre-explosion rock-falling body The area of the pre-blasted rock mass between the blasted drill hole (10) and the empty hole (11) drill hole is K, and the loosening coefficient of the blasted rock mass of the mine.
6. A goaf-filled well blasting structure as recited in claim 1, wherein: when the through holes of the drill holes (10) are blasted, stemming is filled in the bottoms and the orifices of the holes, and the filling length is smaller than the minimum resistance line.
7. A goaf-filled well blasting structure as recited in claim 6, wherein: the explosion drill hole (10) is internally filled with hole bottom stemming (13), granular ammonium nitrate explosive (17), emulsified ammonium nitrate explosive (16) and orifice stemming (14) from bottom to top in a segmented mode, an explosion conducting electric detonator (15) is arranged in the emulsified ammonium nitrate explosive (16), and an explosion conducting cable (12) penetrates through the granular ammonium nitrate explosive (17) and is connected with the explosion conducting electric detonator (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322062446.4U CN220288443U (en) | 2023-08-02 | 2023-08-02 | Goaf filling well blasting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322062446.4U CN220288443U (en) | 2023-08-02 | 2023-08-02 | Goaf filling well blasting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220288443U true CN220288443U (en) | 2024-01-02 |
Family
ID=89337520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322062446.4U Active CN220288443U (en) | 2023-08-02 | 2023-08-02 | Goaf filling well blasting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220288443U (en) |
-
2023
- 2023-08-02 CN CN202322062446.4U patent/CN220288443U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110939442B (en) | Method for treating rock burst by pressure relief source in ground fracturing area | |
| WO2019227852A1 (en) | Fracture relieving method for stress concentration of pillar left in overlying goaf | |
| WO2011103620A1 (en) | A method of reducing subsidence or windblast impacts from longwall mining | |
| CN113107490A (en) | Roof cutting and pressure relief method for high-ground-stress hard roof of coal mine | |
| CN107060773B (en) | A kind of underground chamber drilling and blasting method damping excavation method of static(al) explosion presplitting shock insulation | |
| CN104296609B (en) | Containing the controlled blasting method of different hardness rock stratum in Deep hole bench balsting | |
| CN109826628A (en) | Presplitting arching without pillar mining method under the conditions of a kind of tight roof | |
| CN112780340A (en) | Method for preventing rock burst in advance in coal mine underground and upper regions | |
| CN115749713B (en) | Rock stratum variable frequency pulse seam net fracturing method and equipment | |
| CN107120137A (en) | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method | |
| CN109899109A (en) | The grouting filling method in irregular goaf | |
| CN112922598A (en) | Method for reducing gob-side entry driving roof pressure through roof cutting and pressure relief | |
| CN111238329A (en) | Method for performing geometric forming blasting on semi-coal rock roadway by adopting instantaneous bursting device | |
| CN110219650A (en) | A kind of environment remodeling stage deep hole afterwards filling mining method | |
| CN103233739A (en) | Mining method for thick and large ore pillar under filling body package | |
| CN220288443U (en) | Goaf filling well blasting structure | |
| CN109025999B (en) | One-field three-purpose top coal weakening method | |
| CN110940242A (en) | Blasting excavation method for deep crack containing slope rock mass | |
| CN220288442U (en) | Filling well blasting structure for constructing drilling holes from bottom to top | |
| CN113847029B (en) | Surrounding column extraction method for underground mine high and large point column | |
| CN110671979A (en) | Controlled blasting method for forming cutting well by deep hole extrusion blasting | |
| CN113202474B (en) | Blasting method for protecting eyebrow line by sectional caving method | |
| CN112727459B (en) | Mining method for reducing mining influence of shallow coal seam | |
| CN114673497A (en) | Suspended roof treatment method based on hard roof direction control cracking | |
| CN113700016A (en) | Ground water plugging method for extremely strong flowing water passing channel of underground mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |