CN101858218B - Shaft sinking process for expansion well completion of mine vertical shaft with boring method - Google Patents
Shaft sinking process for expansion well completion of mine vertical shaft with boring method Download PDFInfo
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- CN101858218B CN101858218B CN 201010172179 CN201010172179A CN101858218B CN 101858218 B CN101858218 B CN 101858218B CN 201010172179 CN201010172179 CN 201010172179 CN 201010172179 A CN201010172179 A CN 201010172179A CN 101858218 B CN101858218 B CN 101858218B
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Abstract
The invention relates to a shaft sinking process for a expansion well completion of mine vertical shaft with boring method, mainly solving the problems of large amount of equipments occupied, high engineering cost, low efficiency, slow velocity of well completion in current mine vertical shaft well completion and comprising the following steps: 1) drilling a shaft; 2) prefabricating a well wall; 3) sinking the well wall; and 4) filling the sunk well wall. In the step of drilling the shaft, the modes of a primary leading hole and a primary final expanding hole are used for well completion, which can greatly improve the well completion speed of the shaft sinking with the boring method by about 20%; a primary leading hole is used for drilling only, which decreases the amount of equipment occupied, reduces slurry emission by about 20% and lowers environment pollution. By adopting a high power drilling machine, a special drilling tool and reasonable technical parameters, the well completion skewness is less than 0.04%.
Description
Technical field:
The present invention relates to adopt the construction technology of sinking by boring in the mine working construction, a kind ofly specifically expand into well sinking by boring technique for vertical shaft for mine pit shaft one.
Background technology:
Sinking by boring is a kind of Fully-mechanized comprehensive sinking shaft technique, and the staff realizes digging a well and do not go into the well in ground handling.1. construction technology comprises the stratum broken rock and soil, carries, carries and separate; 2. expand step by step well; 3. well side temporary lining; 4. permanent support comprises the borehole wall manufacture, suspend sinking, support with backfilling, slip casting etc.Utilization drives drilling rod at the major diameter Rotary table for drilling machine of ground configuration, and drilling rod drives bit, and the hobboing cutter on the drill bit is realized rotation and revolution, and the stratum is produced impact, extruding, scraping comprehensive function, and layer is broken on the spot; After boring reaches the degree of depth, creep into and revise well and partially reach hole deviation through repeatedly expanding well again, when reaching intended diameter again with reinforced concrete shaft lining prefabricated on the ground or steel plate concrete composite shaft lining, connect section by section with the steel flange dish, in mud-filled wellhole, suspension sinks down into the shaft bottom and makes permanent support.At last in borehole wall periphery with cement paste or other material, the filling well cementation of mud is replaced in segmentation according to formation condition.Existing sinking by boring technique is owing to comprising repeatedly reaming and creep into link, utilizes drill capacity although repeatedly reaming can relative efficiency, also has many problems: a plurality of reaming bits of needs, and the hold facility amount is large, and engineering cost is high; Service working time is long, work efficiency is low, and Completed advance rate is slow, can not satisfy quick shaft building needs.
Summary of the invention:
For reducing construction cost, reduce drilling time, accelerate Completed advance rate, the invention provides a kind of vertical shaft for mine pit shaft " expands into well " sinking by boring technique.This process using is the leading hole whole hole reaming method of creeping into once once, greatly improves the Completed advance rate of sinking by boring, and safety, reliable, construction cost is low.
Technical scheme of the present invention is: 1, a kind of vertical shaft for mine pit shaft one expands into well sinking by boring technique, mainly comprises the following steps:
1. pit shaft creep into, 2. prefabricated, the 3. 4. support with backfilling of the borehole wall that sinks of the borehole wall.
1. pit shaft creeps into: comprise once boring and a reaming; It is AD130-1000 type rig that rig adopts the model of Luoyang Design of Mining Machinery academy and the co-design manufacturing of the special sinking shaft of middle coal company, and hobboing cutter or scraper can be selected insert cutter or middle tooth cutter by geological conditions; Drive kelly and common drilling rod by unit head, drive bit; Insert cutter or middle tooth cutter are housed on the drill bit, the broken rock of rotation under certain pressure, making catalase is landwaste, then send into compressed air by the airduct in the drilling rod, rise the mud that the liquid method will contain landwaste with calming the anger and drain at a high speed ground, the mud that contains landwaste returns in the well after through ground precipitation purified treatment; The rig rotating speed is 0-18r/min during this time, drill pressure less than drill bit in mud weight 60%, when each stratum handing-over band and weathered zone crept into, the pressure of the drill suitably reduced 5-10T again on original basis; Pilot hole diameter and geological conditions, counter bore diameter and pressure fan ability have relation, need to set according to actual conditions, generally adopt equal-area method, if a bore diameter is too large, exceed the pressure fan Capability Requirement, maximum gauge is as pilot hole diameter in the pressure fan limit of power.
Be the verticality of monitoring boring, when creeping into certain depth or boring when finishing, adopt the Ultrasonic Well Logging instrument, deviational survey is carried out in boring, can continue construction after meeting standard, otherwise, adopt correction to process;
2. the borehole wall is prefabricated: when creeping into, and prefabricated lining on the ground, the borehole wall is reinforced concrete shaft lining or steel plate composite shaft lining, makes section by section on the basis after the levelling on the ground;
3. the borehole wall sinks: utilize mud that then the buoyancy of the borehole wall added ballast water in well, the borehole wall is slowly sunk, and control its hoverheight in mud, and during borehole wall spreading behind centering, weld, wall submersion carries out righting on earth afterwards, qualified after with suitable for reading fixing;
4. support with backfilling: be to the Filling of Annulus Space slip casting between the borehole wall and the rock side, from bottom to top divide some sections high to carry out, adopt cement paste and rubble to replace filling, the first filling section adopts the backfilling cement slurries, rock filling is inserted equably by well head, then is consolidated into well.
Beneficial effect of the present invention is mainly reflected in: owing to adopting above-mentioned technique, change the classification reaming into a reaming, originally reaming Completed advance rate 25～30m/ month repeatedly, change rear Completed advance rate and can reach 30～40m/ month, Completed advance rate improves about 20%; Owing to having shortened drilling time, the mud emission amount reduces approximately 20%, reduces a large amount of mud storage space areas, reduces the pollution to environment; Owing to having adopted high-power rig and special drilling tool and rational technical data, make the useful area in the whole hole of drilling well satisfy the installation requirement that borehole wall suspension is sunk, become the deviating rate less than 0.04%.
Description of drawings
The schematic diagram of Fig. 1 boring, reaming construction;
The leading hole drill of Fig. 2 advances schematic diagram;
Schematic diagram is crept in Fig. 3 reaming.
1-master cylinder among the figure, 2-drilling cramp, 3-balladeur train, 4-unit head, 5-hydraulic pressure, electrical system, 6-drilling machine platform, 7-seals flatcar, 8-drilling rod, 9-guide hole drill bit, 11-discharge trough, 13-discharge pipe, 15-ground mud pit, 16-mud groove, 17-mud, 18-wellhole, 19-fore shaft, 20-reaming bit.
The specific embodiment:
The invention will be further described below in conjunction with accompanying drawing:
Shown in accompanying drawing 1-accompanying drawing 3, this vertical shaft for mine pit shaft one expands into well sinking by boring technique, mainly comprises the following steps:
1. pit shaft creep into, 2. prefabricated, the 3. 4. support with backfilling of the borehole wall that sinks of the borehole wall;
At first 1., pit shaft creeps into: comprise once boring and a reaming, shown in accompanying drawing 1 and accompanying drawing 2,2 is drilling cramp, and 18 is mud, and 9 is the guide hole drill bit, and 20 is reaming bit; The vertical trepan that hole drilling and reaming all adopts power unit type hydraulic cylinder to promote is made by Luoyang Design of Mining Machinery academy and the special sinking shaft of middle coal company co-design, and model is AD130-1000 type rig; Drilling tool can be selected insert cutter or middle tooth cutter according to geological conditions, and topsoil is generally used middle tooth cutter, and rock section is generally used insert cutter; And reaming to creep into be a reaming Cheng Jing, as shown in Figure 3, drilling machine platform 6 is installed on the ground fore shaft 19, sealing flatcar 7 is installed at the female end place of fore shaft 19, drilling machine platform 6 is equipped with hydraulic pressure, electrical system 5; Process is as follows: master cylinder 1 is by drilling cramp 2 guiding, propulsion power head 4 moves down along balladeur train 3, drive common drilling rod and kelly 8 in the process that moves down, drive 9 rotations of guide hole drill bit, form guide hole, then change reaming bit 20, insert cutter or middle tooth cutter are housed on the reaming bit 20, the maximum gauge of cutter is that reaming is waste footpath; The broken rock of rotation under certain pressure, form wellhole 18 when making catalase be landwaste, then send into compressed air by the airduct in the drilling rod 8, rise the mud 17 that liquid will contain landwaste with calming the anger and drain into ground mud pit 15 by drilling rod 8 and discharge pipe 13 at a high speed through discharge trough 11, the mud that contains landwaste returns in the well by mud groove 16 after through ground precipitation purified treatment.Technical data is during this time: rig moment of torsion 600kNm, unit head rotating speed 0-18r/min; Drill pressure less than drill bit in mud weight 60%, when each stratum handing-over band and weathered zone crept into, the pressure of the drill suitably reduced 5-10T again on original basis.
Be the verticality of monitoring boring, when creeping into certain depth or boring when finishing, adopt the Ultrasonic Well Logging instrument, deviational survey is carried out in boring, can continue construction after meeting standard, otherwise, adopt correction to process;
2. the borehole wall is prefabricated: when creeping into, and prefabricated lining on the ground, the borehole wall is reinforced concrete shaft lining and steel plate composite shaft lining, makes section by section on the basis after the levelling on the ground;
3. the borehole wall sinks: be to utilize mud that then the buoyancy of the borehole wall added ballast water in well, the borehole wall is slowly sunk, and control its hoverheight in mud, and behind centering, weld during borehole wall spreading, what aligning method generally adopted is to fasten a meter word line at borehole wall center, then fastens vertical line and a rice word line central point centering; Wall submersion carries out righting on earth afterwards, and the righting of pit shaft is just generally being adopted two 20-30T jack top, notes needing to guarantee the synchronism of jack, will suitable for readingly fix after qualified;
4. support with backfilling: be to the Filling of Annulus Space slip casting between the borehole wall and the rock side, from bottom to top divide some sections high to carry out, adopt cement paste and rubble to replace filling, the first filling section adopts the inner tube slip casting method, the backfilling cement slurries, both arranged 5 interior grouting pipelines in pit shaft, wherein 4 are used for the high filling of first paragraph, and remaining one is used for checking secondary after-teeming slurry behind the wall; Rock filling is inserted equably by well head, then is consolidated into well.
When implementing vertical shaft for mine pit shaft " expands into well " sinking by boring technique, the main technique technical requirements is as follows:
(1) control of pit shaft deflection: drill bit all guarantees to aim at drill center under its free state before creeping into, and its Deviation Control is in 5mm; The employed the pressure of the drill of borings at different levels all less than drill bit in mud weight 60%; When each stratum handing-over band and weathered zone crept into, the pressure of the drill suitably reduced 5-10T again on original basis; Adopting SKD-1 type Ultrasonic Well Logging instrument, verticality and the hole diameter of borings at different levels are measured timely, in order in time take satisfactory after correcting, generally is will carry creeping into capable cleaning bottom of hole, until deviation proportion and hole diameter reach requirement.
(2) the well side is stable: strictly control drilling parameter; the pressure of the drill less than drill bit in mud weight 60%; the leading general rotating speed 5r/min in hole; moment of torsion is the 40%-60% of rig peak torque; the general 3r/min of reaming; moment of torsion is 80% of rig maximum capacity; and consider the mud property parameter: 1. suppress pulping: adopt the high molecular polymer chemical agent; utilize its special construction preferentially to occupy the adsorbable zone on landwaste surface; form topping on its surface, effectively stop with mud in the contacting of Free water, the inhibition slime water is to the aquation of drilling cuttings; broken landwaste is kept intact substantially, thereby suppress the complete pulping of soil block in creeping into.2. reduce sand factor: utilize sedimentation basin to lean on the larger landwaste of Action of Gravity Field sedimentation diameter; Discharge less landwaste with cyclone again; And then with the more tiny landwaste of sodium phosphate trimer flocculating setting and flour sand.3. reduce fluid loss: if mud viscosity surpasses 24s, first thin up (fluid loss may raise, but the mud skin forms, can not cause too large harm) to 24s adds CMC again, and fluid loss is lowered.4. mud parameter is controlled principle: to control fluid loss, to relax density value as means, to form the inboard head of liquid of hole wall greater than the head of liquid in the hole wall outside, the assurance well is helped stable.
(3) processing of balled bit: take various several measures, as reducing the mud viscosity, the control fluid loss is strictly controlled drilling parameter, offers side draught and closes up, and strengthens the mud uptake.
(4) pilot hole diameter is selected: pilot hole diameter and geological conditions, counter bore diameter and pressure fan ability have relation, need to set according to actual conditions, the general equal-area method that adopts, if one time bore diameter is too large, exceed the pressure fan Capability Requirement, advance diameter with maximum gauge in the pressure fan limit of power as leading hole drill.
This technique is owing to adopting once leading hole and once whole hole reaming, and Completed advance rate improves about 20%; The mud emission amount reduces approximately 20%, reduces the pollution to environment; Owing to having adopted high-power rig and special drilling tool and rational technical data, having made into the deviating rate less than 0.04%.This technique is not only used coal industry, also can use in other similar underground mine engineering.
Claims (1)
1. a vertical shaft for mine pit shaft one expands into well sinking by boring technique, and it comprises the following steps:
1. pit shaft creeps into: comprise once boring and a reaming; It is AD130-1000 type rig that rig adopts the model of Luoyang Design of Mining Machinery academy and the co-design manufacturing of the special sinking shaft of middle coal company, and hobboing cutter or scraper are pressed geological conditions and selected insert cutter or middle tooth cutter; In the time of construction, drilling machine platform (6) is installed on the ground fore shaft (19), and sealing flatcar (7) is installed at the female end place of fore shaft, and drilling machine platform is equipped with hydra-electric system (5); Master cylinder (1) is by drilling cramp (2) guiding, propulsion power head (4) moves down along balladeur train (3), drive common drilling rod and kelly (8) in the process that moves down, thereby drive guide hole drill bit (9) rotation, on the described guide hole drill bit insert cutter or middle tooth cutter are housed, the guide hole bit forms guide hole; Then change reaming bit (20), insert cutter or middle tooth cutter are housed on the described reaming bit, the broken rock of rotation under certain pressure, form wellhole (18) when making catalase be landwaste, then send into compressed air by the airduct in common drilling rod and the kelly (8), rise mud (17) that liquid will contain landwaste with calming the anger by common drilling rod, kelly (8) and discharge pipe (13) at a high speed drain into ground mud pit (15) through discharge trough (11), and the mud that contains landwaste returns in the well by mud groove (16) after through ground precipitation purified treatment; The rig rotating speed is 0-18r/min during this time, drill pressure less than drill bit in mud weight 60%, when each stratum handing-over band and weathered zone crept into, the pressure of the drill suitably reduced 5-10T again on original basis; Pilot hole diameter and geological conditions, counter bore diameter, pressure fan ability have relation, need to set according to actual conditions, generally adopt equal-area method to determine, if a bore diameter is too large, exceed the pressure fan Capability Requirement, maximum gauge is as pilot hole diameter in the pressure fan limit of power; Be the verticality of monitoring boring, when creeping into certain depth or boring when finishing, adopt the Ultrasonic Well Logging instrument, deviational survey is carried out in boring, can continue construction after meeting standard, otherwise, adopt correction to process, Deviation Control is in 5mm;
2. the borehole wall is prefabricated: when creeping into, and prefabricated lining on the ground, the borehole wall is reinforced concrete shaft lining or steel plate composite shaft lining, makes section by section on the basis after the levelling on the ground;
3. the borehole wall sinks: utilize mud that then the buoyancy of the borehole wall added ballast water in well, the borehole wall is slowly sunk, and control its hoverheight in mud, and behind centering, weld during borehole wall spreading, wall submersion carries out righting on earth afterwards, qualified after with suitable for reading fixing;
4. support with backfilling: to the Filling of Annulus Space slip casting between the borehole wall and the rock side, from bottom to top divide some sections high to carry out, adopt cement paste and rubble to replace filling, the first filling section adopts the backfilling cement slurries, rock filling is inserted equably by well head, then is consolidated into well.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010172179 CN101858218B (en) | 2010-05-14 | 2010-05-14 | Shaft sinking process for expansion well completion of mine vertical shaft with boring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010172179 CN101858218B (en) | 2010-05-14 | 2010-05-14 | Shaft sinking process for expansion well completion of mine vertical shaft with boring method |
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| CN101858218A CN101858218A (en) | 2010-10-13 |
| CN101858218B true CN101858218B (en) | 2013-04-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102493809A (en) * | 2011-12-12 | 2012-06-13 | 北京中煤矿山工程有限公司 | Comprehensive shaft sinking method of positive and raising boring for vertical shaft |
| CN103133004B (en) * | 2013-01-25 | 2015-03-04 | 北京中煤矿山工程有限公司 | Technological process of ground prefabrication and installation of inner shaft wall of freezing shaft |
| CN103256004A (en) * | 2013-05-15 | 2013-08-21 | 河北建设勘察研究院有限公司 | Downward driving slurry-free bed rock mechanical drilling construction method |
| CN115822609B (en) * | 2023-02-09 | 2023-06-02 | 中国建筑西南勘察设计研究院有限公司 | Shaft variable diameter construction control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349064A (en) * | 2008-08-26 | 2009-01-21 | 中国水利水电第五工程局 | Construction method of hydroelectric power station surge chamber vertical shaft under soft rock geological condition |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101349064A (en) * | 2008-08-26 | 2009-01-21 | 中国水利水电第五工程局 | Construction method of hydroelectric power station surge chamber vertical shaft under soft rock geological condition |
Non-Patent Citations (4)
| Title |
|---|
| 崔广心.钻井法凿井（一）.《建井技术》.1983,(第4期),49-52. * |
| 崔广心.钻井法凿井(二).《建井技术》.1984,(第1期),51-55. * |
| 张永成等.钻井法凿井技术的发展和张望-小型钻井试验40周年纪念.《建井技术》.2003,第24卷(第2期),1-6. * |
| 杨爱东等.巨野煤田郭屯矿井钻井法凿井技术研究.《中国矿业》.2003,第12卷(第6期),51-53. * |
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Granted publication date: 20130403 Termination date: 20160514 |