CN201460734U - High-pressure water jet coal seam drilling and reaming system - Google Patents
High-pressure water jet coal seam drilling and reaming system Download PDFInfo
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- CN201460734U CN201460734U CN 200920127885 CN200920127885U CN201460734U CN 201460734 U CN201460734 U CN 201460734U CN 200920127885 CN200920127885 CN 200920127885 CN 200920127885 U CN200920127885 U CN 200920127885U CN 201460734 U CN201460734 U CN 201460734U
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Abstract
The utility model discloses a high-pressure water jet coal seam drilling and reaming system, comprising a high-pressure water jet generating system, a drilling machine, a drilling rod and a drilling tool system, wherein, the high-pressure water jet generating system comprises a water storage tank, a high-pressure water pump, and a high-pressure rubber tube which are sequentially connected, and the drilling machine comprises a drilling machine control platform and a drilling machine main body; the drilling rod and the drilling tool system comprises a high-pressure rotating sealed device, a high-pressure sealing drilling rod, and a jet mechanical blade combined tower type drill head which is provided with a high-pressure water jet nozzle; in the utility model, the drilling and the reaming of the coal seam is realized through the combined action of the rotatedly cutting to the coal body at hole bottom and hole wall by the high-pressure water jet and the chipping and grinding by the mechanical blade, and the phenomenon of drill blocking and drill clamping during process of coal drilling is effectively avoided, a long drilling hole with large pore diameter is formed in high ground stress and soft coal seam, the ventilation property and the pressure relief range of the coal body around the drilling hole are increased, meanwhile, the gas suction and drainage effect and the gas anti-outburst effect for the coal seam drilling hole are increased.
Description
Technical field
The utility model relates to Safety of Coal Mine Production mining equipment technical field, and the reaming system is bored in particularly a kind of high-pressure water jet coal seam.
Background technology
Along with the increase to coal demand of the development of coal in China industry and national economy, coal production improves constantly.Like this, existing high gas and coal and gas outburst mine face the pressure that improves output on the one hand, and the deepening of mine main makes original mine gradually become high gas, projecting mine more and more on the other hand.For projecting coal bed and high gas layer, gas drainage under suction is the measure that effects a permanent cure that control is outstanding and administer gas, and gas suction by drilling is feasible and comparatively economic a kind of drainage method, has obtained application more and more widely.
China is the outstanding the most serious country of disaster of coal and gas, and according to incompletely statistics, outstanding every year on average number of times is more than 600 times, and protrusion-dispelling is the main task of Safety of Coal Mine Production.The geostatic stress in these collieries is big, the coal seam is soft, and projecting coal bed gas pressure is big.Conventional mechanical rig tool construction usually bit freezing, stick of tool, spray orifice can occur along the unusual difficulty of layer boring, even phenomenon such as outstanding, causes construction depth little, even security incident takes place.In addition, because the diameter of boring is big more, the gas drainage under suction effect is good more, adopts traditional machine dimensions drill construction large diameter borehole just difficult more.But, if only adopt contactless jet rig tool, the bulk cinder appears in boring procedure easily, stop up boring and cause deslagging not smooth, and make the Completion of Drilling Hole degree of depth very limited, limited its application greatly.
At China the high-ground stress of significant proportion, soft, high gas layer are arranged, and these coal seams along the unusual less concrete condition of difficulty and layer-through drilling coal seam sector hole footpath of layer mechanical type drilling construction, overcome the shortcoming of power auger facility and jet rig tool, the construction technology of the broken coal borer reaming of research and development jet mechanically combining, promptly high-pressure water jet coal seam brill reaming system and method seems particularly urgent and necessary.
In view of above situation, for depth of pore forming and the aperture that increases high gas, projecting coal bed firedamp taking-out discharging drilling, exploitation can be applicable to simultaneously along the high-pressure water jet coal seam of coal bed drilling and layer-through drilling reaming construction bores counter-boring techniques and equipment, will have boundless application prospect undoubtedly.
The utility model content
In view of this, the utility model provides a kind of high-pressure water jet coal seam to bore the reaming system, bore counter-boring techniques by utilization high-pressure water jet coal seam, can solve in China's high-ground stress, weak seam, the problem that the conventional mechanical drilling machine construction is difficult along layer boring and sector hole footpath in layer-through drilling coal seam is little, realize the coal seam along layer boring and reaming synchronization implementation, and the purpose of layer-through drilling reaming.
The purpose of this utility model provides a kind of high-pressure water jet coal seam and bores the reaming system, comprise the high-pressure water jet generation systems, rig, the drill rod boring tool system, described high-pressure water jet generation systems comprises the storage tank that links to each other successively, high-pressure hydraulic pump, high-pressure rubber pipe, described rig comprises rig console and rig body, the drill rod boring tool system comprises the high pressure rotary sealing device, high pressure sealing drilling rod and jet mechanical blade combination tower type drill bit, the front end of described jet mechanical blade combination tower type drill bit is provided with at least one high-pressure water shot flow nozzle, described high-pressure rubber pipe links to each other with the afterbody of high pressure sealing drilling rod by the high pressure rotary sealing device and communicates with the inner chamber of high pressure sealing drilling rod, the afterbody that the other end of described high pressure sealing drilling rod links to each other with jet mechanical blade combination tower type drill bit links to each other, and the inner chamber of described high pressure sealing drilling rod is connected with the high-pressure water shot flow nozzle.
Further, the front end face of described jet mechanical blade combination tower type drill bit is provided with a plurality of mechanical blade symmetrically and evenly by the center, and under the rotation induced effect of high pressure sealing drilling rod, described jet mechanical blade combination tower type drill bit can be realized axial rotation;
Further, described high-pressure water shot flow nozzle comprises directly to nozzle, the described center of rotation position that directly is arranged in jet mechanical blade combination tower type drill bit to nozzle vertically;
Further, described high-pressure water shot flow nozzle comprises at least two oblique nozzles, and described oblique nozzle is arranged between the mechanical blade, has angle between the axis of described oblique nozzle and the axis of ejecting device, along the water outlet direction, the angular range of this angle is 30 °～75 °;
Further, at the middle part of jet mechanical blade combination tower type drill bit, on same cross-sectional circumferential, be symmetrically arranged with at least two side direction nozzles in equally spaced mode;
Further, the rear portion of described jet mechanical blade combination tower type drill bit is provided with dismountable rearmounted blade that increases;
Further, being connected between described jet mechanical blade combination tower type drill bit and the high-pressure spray drilling rod, and built-in crush seal connected mode is all adopted in the connection between the high-pressure spray drilling rod;
Further, described high pressure rotary sealing device comprises axis of rotation, high-pressure seal ring and the external shell of hollow, and the junction adopts high-pressure seal ring to seal, and described axis of rotation is arranged on external shell inside and can realizes axial rotation under external force; One end of described axis of rotation is connected with the shaft of high-pressure spray drilling rod, and the other end is fixedlyed connected with high-pressure rubber pipe, and the internal cavities of described axis of rotation communicates with high-pressure spray drilling rod and high-pressure water shot flow nozzle.
The beneficial effects of the utility model are:
1. the utility model adopts the broken coal borer counter-boring techniques of high-pressure water jet combine, be different from the conventional drilling rod rotation of leaning on and drive the pure machine drilling technology that the realization of drill bit rotation cutting rib is crept into, conventional mechanical drill with hole between closely contact, when boring collapses the hole, be easy to occur the bit freezing phenomenon, cause and to creep into; Present technique also is different from pure jet drilling technology, and pure jet drilling is easy to generate the bulk cinder, causes the deslagging compensation to stop up boring; And to bore counter-boring techniques be to realize creeping into reaming by the associating high-pressure water jet to the cutting and grinding of rib rotation cutting and mechanical blade in the high-pressure water jet coal seam, bulk cinder in the boring can be ground to decompose smoothly and be discharged, thereby can avoid bit freezing and stick of tool effectively, solve the difficult problem of brill reaming construction in high-ground stress, soft high gas layer;
2. the utility model can adapt to various geological conditionss in use, and does not have the heating of mechanical drill, the defectives such as short of wearing and tearing, receive a mandate, and can reduce operating cost and can shorten maintenance, downtime of bit change more.Compare with the conventional mechanical borer system, its operating cost is cheap;
3. when the diameter of construction coal bed drilling increases, the load of conventional mechanical rig will become geometric growth, therefore the large diameter borehole of constructing is very difficult, and system of the present utility model can be by the jet mechanical blade combination tower type drill bit with nozzle of the appropriate design major diameter long drilled holes of constructing, and realizes that the coal seam creeps into the target with the reaming synchronization implementation.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by following manual and claims.
Description of drawings
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:
Fig. 1 is the utility model structural representation;
Fig. 2 is a jet mechanical blade combination tower type drill bit structure schematic diagram;
Fig. 3 be Fig. 2 along A-A to structural representation;
Fig. 4 be Fig. 2 along B-B to structural representation;
Fig. 5 is the built-in extruded sealing structure schematic diagram of drilling rod.
The specific embodiment
Hereinafter with reference to accompanying drawing, embodiment of the present utility model is described in detail.Should be appreciated that embodiment only for the utility model is described, rather than in order to limit protection domain of the present utility model.
The 1-borer system; 2-high pressure sealing drilling rod; The 3-storage tank; The 4-high-pressure hydraulic pump; The 5-high-pressure rubber pipe; The 6-rotary sealing appts; 7-jet mechanical blade combination tower type drill bit; The 8-mechanical blade; The rearmounted blade that increases of 9-; 10-is directly to nozzle; The 11-side nozzle; The oblique nozzle of 12-; 13-snap joint; The 14-control valve.
As shown in Figure 1, the reaming service system is bored in high-pressure water jet of the present utility model coal seam, comprise rig 1, rig 1 comprises hydraulic pump, console and rig body, this brill reaming system also comprises the high-pressure water shot streaming system, the high-pressure water shot streaming system comprises the storage tank 3 that links to each other successively, high-pressure hydraulic pump 4 and high-pressure rubber pipe 5, the utility model also comprises the drill rod boring tool system, mainly by high pressure rotary sealing device 6, high pressure sealing drilling rod 2, jet mechanical blade combination tower type drill bit 7 is formed, high-pressure rubber pipe 5 links to each other with the afterbody of high-pressure spray drilling rod 2 by high pressure rotary sealing device 6 and communicates with the inner chamber of drilling rod 2, the water yield is controlled by control valve 14, and the end of high-pressure spray drilling rod 2 is connected with jet mechanical blade combination tower type drill bit 7.The high pressure rotary sealing device comprises axis of rotation, high-pressure seal ring and the external shell of hollow, and the junction seals by high-pressure seal ring, and axis of rotation is arranged on external shell inside and can realizes axial rotation under external force; One end of axis of rotation is connected with the shaft of high-pressure spray drilling rod, and the other end is fixedlyed connected with high-pressure rubber pipe, and the internal cavities of axis of rotation communicates with the jet inner chamber of high-pressure spray drilling rod.
As shown in Figure 2, in jet mechanical blade combination tower type drill bit 7, be provided with a plurality of mechanical blade 8 symmetrically and evenly by the center, the symmetrical centre of mechanical blade 8 is provided with one directly to nozzle 10, directly to the dead in line of nozzle 10 with jet mechanical blade combination tower type drill bit 7, should straight main effect be to make hole ground coal body fragmentation in advance in drill bit the place ahead to nozzle 10, reduce the grinding difficulty of mechanical blade 8, improved drilling efficiency; On the drill bit device, also adopted the quantity oblique nozzle 12 identical with the quantity of drill bit mechanical blade, oblique nozzle 12 is arranged between the adjacent mechanical blade 8 and evenly distributes on the front end face of drill bit device, there is angle between the axis of the axis of oblique nozzle 12 and jet mechanical blade combination tower type drill bit 7, along the water outlet direction, the angular range of this angle is 30 °～75 °, the main effect of oblique nozzle 12 is to form to have axially under drill bit rotation induced effect, radially and the rotating jet of tangential three-dimensional velocity, at the bottom of the boring hole and the power of radially " opening " that applies at rotating jet of hole wall coal body, tangentially " cut " and under the comprehensive crushing force effect that power and axial impact produce coal body is produced to destroy, reached the effect of creeping into simultaneously with reaming; Be provided with dismountable rearmounted blade 9 that increases at the rear of jet mechanical blade combination tower type drill bit 7, form the tower structure of different-diameters with the mechanical blade 8 of front end face, the rearmounted main effect that increases blade 9 is to grind all coal bodies of bulk cinder and hole, and the refinement cinder is convenient to the smooth discharge of cinder in the hole when enlarging the aperture; On the same cross-sectional circumferential in the middle part of mechanical blade 8 and the rearmounted drill bit that increases between the blade 9, along jet mechanical blade combination tower type drill bit radially, be provided with a plurality of side direction nozzles 11 in equally spaced mode, the main effect of this nozzle is a cutting hole week coal body increase bore diameter; According to different brill reaming situations, directly can selectively be provided with to nozzle 10, side direction nozzle 11 and the rearmounted blade 9 that increases, in the higher coal seam of solid coefficient during drilling deep hole, under the condition that reaches the requirement aperture, side direction nozzle 11 and the rearmounted blade 9 that increases can be set, in the reaming construction that with the hole diameter enlargement is purpose, can not be provided with directly to nozzle 10, and side direction nozzle 11 and the rearmounted blade 9 that increases all should be provided with, for other situation, also combination set-up mode that can be different according to actual selection.
As shown in Figure 3, being connected between jet mechanical blade combination tower type drill bit 7 and the high-pressure spray sealing drilling rod 2, and built-in crush seal connected mode is all adopted in the connection between the high-pressure spray sealing drilling rod 2.When carrying out the high-pressure water jet coal bed drilling, the pressure of working media is higher, most places all are to adopt manually-operated during boring, thereby require the high pressure drilling rod will have the welding of enough compressive strength, its joint and sealing that strict demand is all arranged, by adopting crush seal, the jackrod structure that the drilling rod overall structure adopts the typing of Chongqing academy to produce, crudy is guaranteed, and sealing performance can reach desirable effect.
High-pressure water jet of the present utility model coal seam is bored the reaming system and is realized creeping into reaming by the associating high-pressure water jet to the cutting and grinding of rib rotation cutting and mechanical blade, overcome the not smooth and big shortcoming of machine drilling resistance of pure jet drilling deslagging, make the bulk cinder in the boring can be ground decomposition discharge smoothly, thereby can avoid bit freezing and stick of tool effectively, solution is at high-ground stress, the difficult problem of brill reaming construction in the soft high gas layer, on the basis of depth of pore forming and diameter increase, increase the release scope and the permeability of coal bed drilling, improved the gas drainage under suction effect and the outstanding prevention effect of boring.
The method of operating that the reaming system is bored in high-pressure water jet of the present utility model coal seam is as follows:
1) with an end of fixedly connected good high-pressure rubber pipe of snap joint and high pressure rotary sealing device, the other end of high pressure rotary sealing device is connected with the high-pressure spray drilling rod, at the high-pressure spray drill rod end jet mechanical blade combination tower type drill bit is installed;
2) open rig, drive the rotation of high-pressure spray drilling rod, creep into a segment distance along bore angle grinding in the coal seam of design by the mechanical blade of jet mechanical blade combination tower type drill bit;
3) open high pressure water jet equipment, the High-Pressure Water that produces sprays from the high-pressure water shot flow nozzle on the jet mechanical blade combination tower type drill bit through high pressure rotary sealing device and high-pressure spray drilling rod, under the turning effort of high-pressure spray drilling rod drive drill bit, form rotating jet, jet to the hole at the bottom of and the hole wall coal body be rotated cutting, drilling rod drives that drill bit creeps into and reaming under the rotation cutting of jet and mechanical blade grinding compound action;
4) closed control valve creep into predetermined length in coal bed drilling after progressively increases the high-pressure spray drilling rod, to carry out creeping into of next step;
5) after drilling depth reaches the design hole depth, close the high-pressure water jet generation systems, drive progressively to rise by rig and lift injection stream drilling rod, finish the coal seam and bore the reaming construction.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (8)
1. the reaming system is bored in the high-pressure water jet coal seam, comprise the high-pressure water jet generation systems, rig, the drill rod boring tool system, described high-pressure water jet generation systems comprises the storage tank that links to each other successively, high-pressure hydraulic pump, high-pressure rubber pipe, described rig comprises rig console and rig body, it is characterized in that: the drill rod boring tool system comprises the high pressure rotary sealing device, high pressure sealing drilling rod and jet mechanical blade combination tower type drill bit, the front end of described jet mechanical blade combination tower type drill bit is provided with at least one high-pressure water shot flow nozzle, described high-pressure rubber pipe links to each other with the afterbody of high pressure sealing drilling rod by the high pressure rotary sealing device and communicates with the inner chamber of high pressure sealing drilling rod, the afterbody that the other end of described high pressure sealing drilling rod links to each other with jet mechanical blade combination tower type drill bit links to each other, and the inner chamber of described high pressure sealing drilling rod is connected with the high-pressure water shot flow nozzle.
2. the reaming system is bored in high-pressure water jet according to claim 1 coal seam, it is characterized in that: the front end face of described jet mechanical blade combination tower type drill bit is provided with a plurality of mechanical blade symmetrically and evenly by the center, under the rotation induced effect of high pressure sealing drilling rod, described jet mechanical blade combination tower type drill bit can be realized axial rotation.
3. the reaming system is bored in high-pressure water jet according to claim 2 coal seam, it is characterized in that: described high-pressure water shot flow nozzle comprises directly to nozzle, the described center of rotation position that directly is arranged in jet mechanical blade combination tower type drill bit to nozzle vertically.
4. bore the reaming system according to claim 2 or 3 described high-pressure water jet coal seams, it is characterized in that: described high-pressure water shot flow nozzle comprises at least two oblique nozzles, described oblique nozzle is arranged between the mechanical blade, there is angle between the axis of described oblique nozzle and the axis of ejecting device, along the water outlet direction, the angular range of this angle is 30 °～75 °.
5. the reaming system is bored in high-pressure water jet according to claim 4 coal seam, it is characterized in that: at the middle part of jet mechanical blade combination tower type drill bit, be symmetrically arranged with at least two side direction nozzles in equally spaced mode on same cross-sectional circumferential.
6. the reaming system is bored in high-pressure water jet according to claim 5 coal seam, it is characterized in that: the rear portion of described jet mechanical blade combination tower type drill bit is provided with dismountable rearmounted blade that increases.
7. the reaming system is bored in high-pressure water jet according to claim 1 and 2 coal seam, it is characterized in that: being connected between described jet mechanical blade combination tower type drill bit and the high-pressure spray drilling rod, and built-in crush seal connected mode is all adopted in the connection between the high-pressure spray drilling rod.
8. the reaming system is bored in high-pressure water jet according to claim 1 coal seam, it is characterized in that: described high pressure rotary sealing device comprises axis of rotation, high-pressure seal ring and the external shell of hollow, the junction seals by high-pressure seal ring, and described axis of rotation is arranged on external shell inside and can realizes axial rotation under external force; One end of described axis of rotation is connected with the shaft of high-pressure spray drilling rod, and the other end is fixedlyed connected with high-pressure rubber pipe, and the internal cavities of described axis of rotation communicates with high-pressure spray drilling rod and high-pressure water shot flow nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920127885 CN201460734U (en) | 2009-07-01 | 2009-07-01 | High-pressure water jet coal seam drilling and reaming system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920127885 CN201460734U (en) | 2009-07-01 | 2009-07-01 | High-pressure water jet coal seam drilling and reaming system |
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| CN201460734U true CN201460734U (en) | 2010-05-12 |
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| CN 200920127885 Expired - Lifetime CN201460734U (en) | 2009-07-01 | 2009-07-01 | High-pressure water jet coal seam drilling and reaming system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213077A (en) * | 2011-05-25 | 2011-10-12 | 煤炭科学研究总院沈阳研究院 | Coal seam reaming system using three-dimensional (3D) swirling water jet and reaming and fracturing method for permeability enhancement |
| CN102465712A (en) * | 2010-11-15 | 2012-05-23 | 湖南汉寿中煤科技有限公司 | Drilling-cutting-linked coal layer gas drainage and outburst prevention system and method based on ultra-long drilling and high-pressure water jetting |
| CN102606099A (en) * | 2012-03-26 | 2012-07-25 | 佛山市顺德区孔山液压气动科技发展有限公司 | Self-lubricating dust-collecting drill bit device for down-the-hole drill |
| CN101586441B (en) * | 2009-07-01 | 2012-09-19 | 煤炭科学研究总院重庆研究院 | High-pressure water jet system and method for drilling and enlarging holes on coal bed |
| CN103015898A (en) * | 2012-11-27 | 2013-04-03 | 河南宇建矿业技术有限公司 | Mining hydraulic power operation machine |
| CN104005767A (en) * | 2014-06-21 | 2014-08-27 | 吉林大学 | Electronic control telescopic drilling tool for borehole hydraulic mining |
| CN104763335A (en) * | 2015-02-05 | 2015-07-08 | 山东华坤地质工程有限公司 | High pressure water jet rotary cutting method |
| CN107604888A (en) * | 2017-09-28 | 2018-01-19 | 石家庄铁道大学 | Texture stratum detecting earth stress inspecting hole hole-forming device and forming hole method and application |
| CN112697000A (en) * | 2020-12-21 | 2021-04-23 | 吴珅 | Coal open-pit mining blasting method |
| CN113323660A (en) * | 2021-07-21 | 2021-08-31 | 辽宁工程技术大学 | High-stress high-hydraulic coal breaking and reaming device |
| CN114934771A (en) * | 2022-06-13 | 2022-08-23 | 中国矿业大学 | Hydraulic drilling and flushing mining and filling robot and operation method |
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2009
- 2009-07-01 CN CN 200920127885 patent/CN201460734U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101586441B (en) * | 2009-07-01 | 2012-09-19 | 煤炭科学研究总院重庆研究院 | High-pressure water jet system and method for drilling and enlarging holes on coal bed |
| CN102465712B (en) * | 2010-11-15 | 2015-01-28 | 湖南汉寿中煤科技有限公司 | Drilling-cutting-linked coal layer gas drainage and outburst prevention system and method based on ultra-long drilling and high-pressure water jetting |
| CN102465712A (en) * | 2010-11-15 | 2012-05-23 | 湖南汉寿中煤科技有限公司 | Drilling-cutting-linked coal layer gas drainage and outburst prevention system and method based on ultra-long drilling and high-pressure water jetting |
| CN102213077A (en) * | 2011-05-25 | 2011-10-12 | 煤炭科学研究总院沈阳研究院 | Coal seam reaming system using three-dimensional (3D) swirling water jet and reaming and fracturing method for permeability enhancement |
| CN102606099A (en) * | 2012-03-26 | 2012-07-25 | 佛山市顺德区孔山液压气动科技发展有限公司 | Self-lubricating dust-collecting drill bit device for down-the-hole drill |
| CN103015898A (en) * | 2012-11-27 | 2013-04-03 | 河南宇建矿业技术有限公司 | Mining hydraulic power operation machine |
| CN104005767B (en) * | 2014-06-21 | 2015-12-09 | 吉林大学 | A kind of automatically controlled flexible drilling tool for hydraulic borehole mining |
| CN104005767A (en) * | 2014-06-21 | 2014-08-27 | 吉林大学 | Electronic control telescopic drilling tool for borehole hydraulic mining |
| CN104763335A (en) * | 2015-02-05 | 2015-07-08 | 山东华坤地质工程有限公司 | High pressure water jet rotary cutting method |
| CN107604888A (en) * | 2017-09-28 | 2018-01-19 | 石家庄铁道大学 | Texture stratum detecting earth stress inspecting hole hole-forming device and forming hole method and application |
| CN107604888B (en) * | 2017-09-28 | 2019-03-29 | 石家庄铁道大学 | Texture stratum detecting earth stress inspecting hole hole-forming device and forming hole method and application |
| CN112697000A (en) * | 2020-12-21 | 2021-04-23 | 吴珅 | Coal open-pit mining blasting method |
| CN112697000B (en) * | 2020-12-21 | 2022-11-22 | 鄂尔多斯市万兴隆工贸有限责任公司 | Coal open-pit mining blasting method |
| CN113323660A (en) * | 2021-07-21 | 2021-08-31 | 辽宁工程技术大学 | High-stress high-hydraulic coal breaking and reaming device |
| CN114934771A (en) * | 2022-06-13 | 2022-08-23 | 中国矿业大学 | Hydraulic drilling and flushing mining and filling robot and operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100512 Effective date of abandoning: 20090701 |