CN213392157U - Construction structure for blasting high-order section drop shaft into well - Google Patents
Construction structure for blasting high-order section drop shaft into well Download PDFInfo
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- CN213392157U CN213392157U CN202021992103.8U CN202021992103U CN213392157U CN 213392157 U CN213392157 U CN 213392157U CN 202021992103 U CN202021992103 U CN 202021992103U CN 213392157 U CN213392157 U CN 213392157U
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Abstract
The utility model provides a construction structure of high-order section drop shaft blasting completion well, including setting up upper portion big gun hole structure and lower part big gun hole structure in the drop shaft that will be under construction, upper portion big gun hole structure includes the big diameter big gun hole structure of at least two weeks that sets up around the central line of drop shaft, big diameter big gun hole structure includes the vertical and big diameter big gun hole that evenly sets up, big diameter big gun hole runs through upper portion big gun hole structure; the lower blast hole structure comprises at least two-circumference middle-diameter blast hole structures arranged around the central line of the orepass, the middle-diameter blast hole structures comprise vertical and uniformly arranged middle-diameter blast holes, and the middle-diameter blast holes penetrate through the lower blast hole structure; the height of the upper blast hole structure is more than 5 times of the height of the lower blast hole structure. Adopt the utility model discloses can avoid the repeated construction behind the inclined to one side hole of major diameter big gun hole, the protection drop shaft lower hole rock mass is complete.
Description
Technical Field
The utility model relates to an underground works and mining technical field, more specifically relates to a construction structures of high order section drop shaft blasting one-tenth well.
Background
In the traditional drifting of a chute and a cutting well, workers need to work in the well, the labor intensity is high, the working flour dust concentration is high, the working condition is poor, the safety is not high, and safety accidents such as high-altitude falling, gun smoke poisoning and roof collapse are easily caused. With the continuous development of mine technology, the one-time shaft construction technology is gradually and fully developed and applied, and when an underground mine tunnels a raise and a drop shaft, a one-time shaft construction mode is often adopted. A group of parallel large-diameter blast holes are drilled in the raise section by a deep-hole drilling machine, the blast holes are horizontally charged from the top, and the blast holes are blasted in a segmented (2m-5m) from bottom to top.
However, in the construction of the high-order section drop shaft, the precision is reduced after drilling a large-diameter blast hole for more than 60 meters, the drill hole is deviated frequently, the hole can be repaired again for many times after the deviation occurs, and the lower opening of the drop shaft is greatly damaged by blasting of the large-diameter blast hole.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model aims at providing a construction structures of high order section drop shaft blasting one-tenth well adopts the structure that major diameter big gun hole and medium diameter big gun hole combined together, can avoid major diameter big gun hole to repeat the construction partially in hole, and the protection drop shaft is complete in lower mouthful rock mass.
The utility model provides a construction structure of high-order section drop shaft blasting finished shaft, including setting up upper portion big gun hole structure and lower part big gun hole structure in the drop shaft that will be under construction, wherein, upper portion big gun hole structure includes the big diameter big gun hole structure of at least two weeks that sets up around the central line of drop shaft, big diameter big gun hole structure includes the vertical and big diameter big gun hole that evenly sets up, big diameter big gun hole runs through upper portion big gun hole structure; the lower blast hole structure comprises at least two-circumference middle-diameter blast hole structures arranged around the central line of the orepass, the middle-diameter blast hole structures comprise vertical and uniformly arranged middle-diameter blast holes, and the middle-diameter blast holes penetrate through the lower blast hole structure; the upper end of the upper blast hole structure is positioned at the bottom of an upper chamber of the drop shaft, the lower end of the lower blast hole structure is positioned at the top of a lower chamber of the drop shaft, and the lower end of the upper blast hole structure and the upper end of the lower blast hole structure are attached in the drop shaft; and the height of the upper blast hole structure is more than 5 times of the height of the lower blast hole structure.
The drop shaft is a vertical shaft.
The height of the lower blast hole structure is 8m at most, and the height of the upper blast hole structure is 70m at most.
The large-diameter blast hole is arranged on the central line of the drop shaft in the upper blast hole structure.
And the middle-diameter blast hole is arranged on the central line of the drop shaft in the lower blast hole structure.
The large-diameter blast holes are arranged on the edge of the drop shaft in the upper blast hole structure.
And explosives are put in the large-diameter blast holes at intervals.
The middle-diameter blast hole is arranged on the edge of the drop shaft in the lower blast hole structure.
And explosives are put in the medium-diameter blast holes at intervals.
From the above description, the utility model provides a construction structures of high-order section drop shaft blasting one-tenth well divide into upper and lower two parts with the drop shaft, and the upper portion sets up upper portion big gun hole structure, and lower part sets up lower part big gun hole structure, sets up the major diameter big gun hole in the big gun hole structure of upper portion, sets up the middle diameter big gun hole in the big gun hole structure of lower part, and the height of general lower part is within 8m, and the height on upper portion is within 70 m. The large-diameter blast hole is prevented from drilling too deep and then deviating and repeatedly constructing, and the middle-diameter blast hole is arranged at the lower part to protect the integrity of the rock mass at the lower opening of the ore pass. The method is safe and easy to operate, and the efficiency of one-time well formation of the high-order section drop shaft is improved.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings.
In the drawings:
FIG. 1 is a schematic structural view of a construction structure of a high-order section drop shaft blasting completion well according to the present invention;
fig. 2 is a top view of a construction structure of a high-order section draw shaft blasting completion well according to the present invention;
FIG. 3 is a bottom view of a construction structure of a high-order section draw shaft blasting completion well according to the present invention;
wherein, 1-upper blast hole structure, 2-lower blast hole structure, 3-drop shaft center line, 4-large diameter blast hole and 5-middle diameter blast hole.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1, 2 and 3 show the construction structure of the high-order section drop shaft blasting well according to the present invention from different angles, respectively. As shown in fig. 1, fig. 2 and fig. 3, the construction structure for blasting high-stage orepass into a shaft provided in this embodiment can be used for construction of vertical high-stage orepass and mine raise, and can also be used for construction of other deep wells, and the cross section of the orepass is preferably circular. Including setting up upper portion big gun hole structure 1 and lower part big gun hole structure 2 in the vertical drop shaft that will be under construction, divide into upper and lower two parts with the drop shaft, the upper portion sets up upper portion big gun hole structure 1, and the lower part sets up lower part big gun hole structure 2, sets up major diameter big gun hole 4 in the big gun hole structure 1 of upper portion for from the section blasting that makes progress down after the powder charge, upper portion big gun hole structure is dug from the upper portion chamber bottom of drop shaft, if the easy inclined hole of major diameter big gun hole drilling is too dark, can dig the big gun hole degree of depth and be difficult for exceeding 70m deepest. The lower blast hole structure 2 is internally provided with a medium-diameter blast hole 5 for one-time detonation after charging, the lower blast hole structure 2 is dug upwards from the top of the lower chamber of the ore pass, and if the medium-diameter blast hole is too high to charge, the highest blast hole can not exceed 8m easily. The lower end of the upper blast hole structure 1 and the upper end of the lower blast hole structure 2 are attached in the drop shaft. When in construction, the blast hole structure at the lower part is firstly blasted. Since in high-stage orepasses, the height of the upper shot hole structure can be set to be generally more than 5 times the height of the lower shot hole structure. The diameter of a large-diameter blast hole is 76mm, and the diameter of a medium-diameter blast hole is 165 mm.
The upper part blast hole structure 1 comprises at least two circles of large-diameter blast hole structures arranged around a central line 3 of the drop shaft, each circle of large-diameter blast hole structures comprises vertical large-diameter blast holes 4 which are uniformly arranged, each large-diameter blast hole 4 penetrates through the upper part blast hole structure, and the number of the circles of the large-diameter blast hole structures and the number of the large-diameter blast holes per week can be determined according to actual construction conditions. For better blasting, a large-diameter blast hole is arranged on a central line 3 of the drop shaft in an upper blast hole structure, a circle of large-diameter blast holes are uniformly arranged on the edge of the drop shaft in the upper blast hole structure, and then a large-diameter blast hole structure between the central line and the edge of the drop shaft is designed. During blasting, explosives can be put into the large-diameter blast holes on the edge of the draw shaft at intervals, the explosives cannot be put into the large-diameter blast holes on the center line, and the explosives are put into the rest large-diameter blast hole structures.
The lower blast hole structure 2 comprises at least two-week middle-diameter blast hole structures arranged around a central line 3 of the drop shaft, each week middle-diameter blast hole structure comprises uniformly arranged vertical middle-diameter blast holes 5, each middle-diameter blast hole 5 penetrates through the lower blast hole structure, and the number of the week of the middle-diameter blast hole structure and the number of the week middle-diameter blast holes can be determined according to actual construction conditions. For better blasting, a middle-diameter blast hole is arranged on a central line 3 of the drop shaft in the lower blast hole structure, a circle of middle-diameter blast holes are uniformly arranged on the edge of the drop shaft in the lower blast hole structure, and then a middle-diameter blast hole structure between the central line and the edge of the drop shaft is designed. During blasting, explosives can be put into the middle-diameter blast holes on the edge of the orepass at intervals, the explosives cannot be put into the middle-diameter blast holes on the center line, and the explosives are put into the rest middle-diameter blast hole structures.
In this example, the draw shaft has a height of 76m and a cross-section of a circle with a diameter of 3.5 m. The height of the lower blast hole structure 2 is 8m, a middle-diameter blast hole is arranged on the central line of the drop shaft and is a central hole, 4 middle-diameter blast holes are vertically and uniformly arranged on the circumference 140mm away from the central line of the drop shaft and are cut holes, 8 middle-diameter blast hole position auxiliary holes are vertically and uniformly arranged on the circumference 750mm away from the central line of the drop shaft, and 16 middle-diameter blast holes are vertically and uniformly arranged on the circumference 1750mm away from the central line of the drop shaft, namely the outermost circumference of the drop shaft and are peripheral holes. The central hole and the peripheral holes are selected at intervals as compensation holes, and the rest are medicine loading holes. The hole site should be projected onto the chamber roof by the technician according to the mesh design before operation. And blasting operation can be carried out after the drilling construction is finished, the well expansion blasting adopts a full-section-height one-time blasting well forming mode, and blasting adopts a half-second delay detonator and is initiated at 7 section positions at one time.
The height of the upper blast hole structure 1 is 66m, a large-diameter blast hole is arranged on the central line of the drop shaft and is a central hole, 4 large-diameter blast holes are vertically and uniformly arranged on the circumference 750mm away from the central line of the drop shaft and are cut holes, and 8 large-diameter blast holes are vertically and uniformly arranged on the circumference 1750mm away from the central line of the drop shaft, namely the outermost circumference of the drop shaft and are peripheral holes. The central hole and the peripheral holes are selected at intervals as compensation holes, and the rest are medicine loading holes. And after the blasting of the lower blast hole structure is finished, drilling a large-diameter blast hole downwards in the chamber at the upper part of the draw shaft by using a T-150 down-the-hole drilling machine. Before operation, hole sites are projected onto a chamber bottom plate according to a mesh design by technicians, blast holes are vertically and parallelly arranged, and the skewness cannot exceed 1%. And (3) carrying out sectional blasting, wherein the height of each blasting section is 2m, the total explosive loading of the sectional blasting is 288kg, and the maximum single explosive loading is 36 kg. During the operation of plugging hole, the rings of iron wire ligature concrete plug center department transfer the concrete plug to the interval department of 0.5m above the hole bottom and carry out the drill way and suspend in midair fixedly, afterwards to downthehole loading rock powder 0.5m thick can, each dress medicine hole is surveyed the hole after the powder charge is accomplished, guarantees that each dress medicine hole level height is unanimous. When charging and connecting, each hole is laid with a detonating fuse along the hole depth, and the detonating device is used for initiating detonation by adopting a non-electric millisecond differential detonating tube.
The construction structure of the high-order section draw shaft blasting completion well according to the present invention is described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the construction structure of the high-order section drop shaft blasting completion well provided by the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (9)
1. A construction structure for blasting a high-order section of a draw shaft into a shaft is characterized by comprising an upper blast hole structure and a lower blast hole structure which are arranged in the draw shaft to be constructed, wherein,
the upper blast hole structure comprises at least two-circumference large-diameter blast hole structures arranged around the central line of the orepass, the large-diameter blast hole structures comprise vertically and uniformly arranged large-diameter blast holes, and the large-diameter blast holes penetrate through the upper blast hole structure;
the lower blast hole structure comprises at least two-circumference middle-diameter blast hole structures arranged around the central line of the orepass, the middle-diameter blast hole structures comprise vertical and uniformly arranged middle-diameter blast holes, and the middle-diameter blast holes penetrate through the lower blast hole structure;
the upper end of the upper blast hole structure is positioned at the bottom of an upper chamber of the drop shaft, the lower end of the lower blast hole structure is positioned at the top of a lower chamber of the drop shaft, and the lower end of the upper blast hole structure and the upper end of the lower blast hole structure are attached in the drop shaft; and the number of the first and second electrodes,
the height of the upper blast hole structure is more than 5 times of the height of the lower blast hole structure.
2. The construction structure for high-stage orepass blasting shaft formation according to claim 1, wherein the orepass is a vertical shaft.
3. The construction structure for high-stage orepass blasting into a well according to claim 1, wherein the height of the lower shot hole structure is up to 8m, and the height of the upper shot hole structure is up to 70 m.
4. The construction structure for high-stage orepass blasting shaft formation according to claim 1, wherein the large-diameter blastholes are provided on the orepass centerline in the upper blasthole structure.
5. The construction structure for high-stage orepass blasting to form a shaft according to claim 1, wherein the middle-diameter blastholes are provided on the orepass centerline in the lower blasthole structure.
6. The construction structure for high-stage orepass blasting to form a well according to claim 1, wherein the large-diameter blastholes are provided on the edge of the orepass in the upper blasthole structure.
7. The construction structure for high-stage orepass blasting to form a well according to claim 6, wherein explosives are placed in the large-diameter blast holes at intervals.
8. Construction structure for high-stage orepass blasting to form wells according to claim 1, characterized in that the medium-diameter blastholes are provided on the edge of the orepass in the lower blasthole structure.
9. The construction structure for high-stage orepass blasting to form a well according to claim 8, wherein explosives are placed in the medium-diameter blast holes at intervals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021992103.8U CN213392157U (en) | 2020-09-11 | 2020-09-11 | Construction structure for blasting high-order section drop shaft into well |
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| CN202021992103.8U CN213392157U (en) | 2020-09-11 | 2020-09-11 | Construction structure for blasting high-order section drop shaft into well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115143853A (en) * | 2022-08-11 | 2022-10-04 | 南昌大学 | Combined detonation type blasting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115143853A (en) * | 2022-08-11 | 2022-10-04 | 南昌大学 | Combined detonation type blasting method |
| CN115143853B (en) * | 2022-08-11 | 2024-03-01 | 南昌大学 | Combined detonation blasting method |
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