CN104405385A - High-dipping low seam self-walking simple drill coal mining machine and mining method thereof - Google Patents
High-dipping low seam self-walking simple drill coal mining machine and mining method thereof Download PDFInfo
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- CN104405385A CN104405385A CN201410515189.8A CN201410515189A CN104405385A CN 104405385 A CN104405385 A CN 104405385A CN 201410515189 A CN201410515189 A CN 201410515189A CN 104405385 A CN104405385 A CN 104405385A
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- 239000003245 coal Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005065 mining Methods 0.000 title abstract description 17
- 238000007598 dipping method Methods 0.000 title abstract 3
- 238000005553 drilling Methods 0.000 claims abstract description 115
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 6
- 239000012780 transparent material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000002269 spontaneous effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 235000019994 cava Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C27/00—Machines which completely free the mineral from the seam
- E21C27/20—Mineral freed by means not involving slitting
- E21C27/22—Mineral freed by means not involving slitting by rotary drills with breaking-down means, e.g. wedge-shaped drills, i.e. the rotary axis of the tool carrier being substantially perpendicular to the working face, e.g. MARIETTA-type
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- Mining & Mineral Resources (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a high-dipping low seam self-walking simple drill coal mining machine and a mining method thereof, which belongs to the drill coal mining machine and mining method. The simple drill coal mining machine comprises a host, a control board, a pumping station, a caterpillar base plate, a support hydraulic column, a pedestal, a stable hydraulic support, a drilling tool assembly and a coal baffle plate. A drilling rod and a drilling rod in the drilling tool assembly are connected through a planetary gear decelerator, the coal baffle plate employs a full transparent design; the invention provides a high-dipping low seam mining method, the height of the support hydraulic column is adjusted to determine the drilling direction, coal mined under gravity effect falls to a scraper plate conveyer along a drill pit, a goaf employs a nature caving method for treatment, and the ventilation mode of a drilling surface is a U type ventilation mode. According to the invention, jamming of a drilling tool can be effectively solved, drilling power and coal breaking effect of the drill coal mining machine can be ensured, and the drill coal mining machine has the advantages of simple production process, low equipment cost of working surface and high technical economic benefit, and the drill coal mining machine has important meaning for increasing coal mining rate and prolong the service time limit.
Description
Technical field
The present invention relates to a kind of brill coal-winning machine and exploitation method, particularly a kind of steeply inclined thin seam self-propelled simple drill coal-winning machine and exploitation method.
Background technology
In recent years, the most mine of China enters into the length of service later stage, for prolonging length of service, selects exploitation steeply inclined thin seam.Steeply inclined thin seam occurrence condition is complicated, and have the features such as exploitation difficulty is large, the coal resources rate of extraction is low, production of resources consumption is large, traditional exploitation method complex process, production efficiency are low, equipment and technology requires high, are difficult to obtain good techno-economic effect.
Summary of the invention
The steeply inclined thin seam self-propelled simple drill coal-winning machine that the object of the invention is to provide a kind of structure simple, easy to operate and exploitation method, complex process existing when solving traditional exploitation method exploitation steeply inclined thin seam, production efficiency are low, equipment and technology requires high problem.
To achieve these goals, technical scheme of the present invention: this brill coal-winning machine comprises: main frame, console, pumping plant, support hydraulic pressure column, crawler body, base, firm hydraulic prop, drilling tool assembly and spillplate; Main frame, console, pumping plant and drilling tool assembly are fixed on base, and firm hydraulic prop suit is fixed on base four angles, and base is connected with crawler body by four support hydraulic pressure columns; Spillplate is connected to the side of base, and the drill bit of drilling tool assembly stretches out spillplate.
Described drilling tool assembly is made up of drill bit, bit adapter, high torque output shaft, planetary reduction gear, low torque input shaft, tool joint, drilling rod, drill rod connector and water injector; Drill bit, bit adapter, high torque output shaft, planetary reduction gear, low torque input shaft, tool joint and drilling rod are linked in sequence; Described drill bit adopts tapered drill bit, is connected with drilling rod by planetary reduction gear, and the high torque output shaft of planetary reduction gear is connected with drill bit by bit adapter, and low torque input shaft is connected with drilling rod by tool joint; Drilling rod adopts outer flush drill stem, and connected by drill rod connector between two drilling rods, drilling rod has many, and is linked in sequence successively; Described water injector is fixed on drilling rod inside.
Described spillplate adopts all-transparent material to make.
The exploitation method of this brill coal-winning machine, comprises the steps:
1), arrange in haulage gate and bore coal-winning machine, drag conveyor and rubber conveyer, place plant equipment in air return way, staff directly enters into drilling work plane by haulage gate, air return way only for ventilating, haul, not pedestrian;
2), regulate support hydraulic pressure stem height to carry out adjustment and bore coal-winning machine fuselage angle of inclination, drill bit and drilling rod is made to carry out brill coal by haulage gate to air return way along seam inclination direction, until crossheading is formed through brill cave up and down, exit after brill cave completely until drill bit and drilling rod, bore coal-winning machine integral forward lead, and stay to establish and bore cave coal column, enter next circulation;
3), the coal of extraction in drilling process under gravity along bore cave free-falling to immediately below drag conveyor on, be scattered in outer coal and load drag conveyor to manually, reprint on rubber conveyer subsequently, transport out haulage gate;
4), during driving, crossheading adopts bolting with wire mesh mode, and during drilling, near drilling work plane, tunnel adopts hinged girder steel to coordinate firm hydraulic prop to carry out local strengthening supporting;
5) goaf, after drilling adopts not supporting, the process of spontaneous caving method;
6), ventilate: adopt U-shaped draft type, freshly distinguished and admirablely enter into drilling work plane by haulage gate, brill cave after through enters into the large lane of return air by air return way and drains into returnairshaft, the quantity of the brill cave as vent passages need be increased when gas flowing in coal layer is larger, and adopt booster to add forced ventilation, stamp airtight to the brill cave not as vent passages, and adopt mobile brattice to isolate goaf brill cave in time, carry out Seal treatment.
Beneficial effect, owing to have employed such scheme,
1) a kind of steeply inclined thin seam self-propelled simple drill coal-winning machine of the present invention's proposition, has the advantages such as volume is little, lightweight, structure simple, convenient transportation, for steeply inclined thin seam exploitation provides technical equipment condition.Adopt crawler body structure, can realize boring coal-winning machine from walking in crossheading, cancellation work plane rig auxiliary conveying equipments, reduces working face equipment cost; Firm hydraulic prop, with drilling-machine shifter, plays an important role to immediate support drilling work plane, the safety of raising work plane; Regulate hydraulic pressure support post height to carry out adjustment drilling machine body angle of inclination, determine drilling direction; Drill bit adopts tapered drill bit, drilling rod adopts outer flush drill stem, and both are connected by planetary reduction gear, have both efficiently solved bit freezing problem, what ensure again brill coal-winning machine creeps into power and broken coal effect, in drilling process, when drill bit encounters relatively hard roof and floor, drilling rod also can be partial to drilling in coal, automatically drilling direction is adjusted within the specific limits, what form " meeting hard partially soft " creeps into feature, makes drill bit all the time along drilling in coal, can improve the drilling quality of coal; Drilling rod realizes many by drill rod connector and connects successively, provides equipment and technology basis for improving the drilling degree of depth.
2) a kind of steeply inclined thin seam exploitation method that the present invention proposes has that production process is simple, working face equipment cost is low, technical economic benefit advantages of higher, can exploit out and can not exploit or more difficult working seam in the past, to raising mine coal mining rate, to extend mine service-life significant.Adopt self-propelled simple drill coal-winning machine to exploit, coal mining personnel only need operate in crossheading just can complete whole progress of coal mining, reduces number of workers and configuration, reduces labor strength, improves the working environment of workers safety; Simplify coaling, coal heaver's sequence, the coal of extraction directly loads drag conveyor by deadweight, after transport work plane and crossheading through rubber conveyer, reduce Coal Transport corollary equipment and use, simplify coal transportation system, reduce Coal Transport cost; Utilize and bore the ventilation of cave back work face, both reduced and bored the inner methane accumulation of cave, and also avoided dirty wind through workman job site, improve workman's operating environment; Work plane utilizes the firm hydraulic prop of rig to carry out local supporting, simplifies face timbering operation, contributes to accelerating coal mining supporting operating speed; When roof and floor integrality is good, enclosing lithologies is harder, between brill cave, coal pillar width rationally stays to establish and can ensure that goaf is not caving, earth's surface is subzero heavy, realizes lasting exploit.
Accompanying drawing explanation
Fig. 1 is brill coal-winning machine structural front view of the present invention.
Fig. 2 is brill coal-winning machine structure left view of the present invention.
Fig. 3 is drilling coal machine drill tool assembly structure schematic diagram of the present invention.
Fig. 4 is the drilling work plane floor map of the embodiment of the present invention.
Fig. 5 is the drilling work plane generalized section of the embodiment of the present invention.
Fig. 6 is the drilling face-airing schematic diagram of the embodiment of the present invention.
In figure: 1, main frame, 2, console, 3, pumping plant, 4, support hydraulic pressure column, 5, crawler body, 6, base, 7, firm hydraulic prop, 8, drilling tool assembly, 81, drill bit, 82, bit adapter, 83, high torque output shaft, 84, planetary reduction gear, 85, low torque input shaft, 86, tool joint, 87, drilling rod, 88, drill rod connector, 89, water injector, 9, spillplate, 10, bore coal-winning machine, 11, drag conveyor, 12, rubber conveyer, 13, haulage gate, 14, air return way, 15, bore cave, 16, bore cave coal column, 17, drilling work plane, 18, airtight, 19, mobile brattice.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described, and detailed description of the invention is as follows:
This brill coal-winning machine comprises: main frame 1, console 2, pumping plant 3, support hydraulic pressure column 4, crawler body 5, base 6, firm hydraulic prop 7, drilling tool assembly 8 and spillplate 9; Main frame 1, console 2, pumping plant 3 and drilling tool assembly 8 are fixed on base 6, and firm hydraulic prop 7 suit is fixed on base 6 four angles, and base 6 is connected with crawler body 5 by four support hydraulic pressure columns 4; Spillplate 9 is connected to the side of base, and the drill bit of drilling tool assembly 8 stretches out spillplate 9.
Described drilling tool assembly 8 is made up of drill bit 81, bit adapter 82, high torque output shaft 83, planetary reduction gear 84, low torque input shaft 85, tool joint 86, drilling rod 87, drill rod connector 88 and water injector 89; Drill bit 81, bit adapter 82, high torque output shaft 83, planetary reduction gear 84, low torque input shaft 85, tool joint 86 and drilling rod 87 are linked in sequence; Described drill bit 81 adopts tapered drill bit, is connected with drilling rod 87 by planetary reduction gear 84, and the high torque output shaft 83 of planetary reduction gear 84 is connected with drill bit 81 by bit adapter 82, and low torque input shaft 85 is connected with drilling rod 87 by tool joint 86; Drilling rod 87 adopts outer flush drill stem, and connected by drill rod connector 88 between two drilling rods 87, drilling rod 87 has many, and is linked in sequence successively; It is inner that described water injector 89 is fixed on drilling rod 87.
Described spillplate 9 adopts all-transparent material to make.Described all-transparent material is organic glass or is implosion guard.
A kind of steeply inclined thin seam self-propelled simple drill coal-winning machine, as shown in Figure 1, Figure 2, Figure 3 shows, comprise main frame 1, console 2, pumping plant 3, support hydraulic pressure column 4, crawler body 5, base 6, firm hydraulic prop 7, drilling tool assembly 8 and spillplate 9 form, wherein drilling tool assembly 8 is made up of drill bit 81, bit adapter 82, high torque output shaft 83, planetary reduction gear 84, low torque input shaft 85, tool joint 86, drilling rod 87, drill rod connector 88 and water injector 89; Main frame 1, console 2 and pumping plant 3 are fixed on base 6, firm hydraulic prop 7 suit is fixed on base 6 four angles, base 6 is connected with crawler body 5 by four support hydraulic pressure columns 4, regulate the height of four support hydraulic pressure columns 4 to carry out adjustment and bore coal-winning machine fuselage angle of inclination, in order to determine drilling direction.
The drill bit 81 of drilling tool assembly 8 adopts tapered drill bit, be connected with drilling rod 87 by planetary reduction gear 84, the high torque output shaft 83 of planetary reduction gear 84 is connected with drill bit 81 by bit adapter 82, and low torque input shaft 85 is connected with drilling rod 87 by tool joint 86.Tapered drill bit can improve the coal powder quantity of bore of drill bit 81, increase the intensity of drill bit 81, low for drilling rod 87 torque axis is changed to high moment of torsion and is input to drill bit 81 by planetary reduction gear 84 simultaneously, greatly reduce self moment of torsion of drilling rod 87, according to hardness and the rate of penetration in coal seam, selecting the planetary reduction gear of different speed ratio and supporting joint to carry out creeping into, operation effectively can ensure drill bit 81 creeps into power and broken coal effect.
Drilling rod 87 adopts outer flush drill stem, can many connect successively, connected successively by drill rod connector 88 between two drilling rods.During drilling, drill bit 81 encounters relatively hard roof and floor, and drilling rod 87 can be partial to drilling in coal, automatically adjusts drilling direction within the specific limits, and what form " meet hard partially soft " creeps into feature, makes drill bit 81 can all the time along drilling in coal.
It is inner that water injector 89 is fixed on drilling rod 87, ensures to spray water in time in drilling process.
Spillplate 9 adopts all-transparent to design, and has both ensured that boring coal-winning machine 10 accurately carries out drilling operation, enters into the working space of workman, improves the safety of workman's operating environment when also preventing the coal of extraction from gliding.
During seam mining, adopt the wet type mode of creeping into carry out drilling, before using rig, need check whether the water injector 89 in drilling rod 87 blocks, after guaranteeing that each stacked switch, Circuits System each several part and electric locking device are all in normal operating conditions, the accurate operation in side.
A kind of steeply inclined thin seam self-propelled simple drill coal-winning machine exploitation method, as shown in Fig. 4, Fig. 5, Fig. 6, its activities is:
1), in haulage gate 13, brill coal-winning machine 10, drag conveyor 11 and rubber conveyer 12 is arranged, plant equipment is placed in air return way 14, wherein, staff directly enters into drilling work plane 17 by haulage gate 13, and air return way 14 is only for ventilation, haul;
2) as shown in Figure 4, Figure 5, first the angle of inclination of coal-winning machine 10 is bored in adjustment, makes its inclination angle consistent with seam inclination; Then drill bit 81 and drilling rod 87 are carried out brill coal by haulage gate 13 to air return way 14 along seam inclination direction, when having bored a joint drilling rod 87, should stop immediately advancing drilling rod 87, then the work of other devices such as drill bit 81, water injector 89 is stopped, subsequently by drill rod connector 88 continued access drilling rod 87, then open drill bit 81 to rotate, simultaneously to water spray in brill cave 15, continue to advance, until crossheading is formed through brill cave 15 up and down, the brill cave 15 after through can be used as later stage vent passages back work face and ventilates; When after brill cave 15 through upper and lower two crossheadings, drill bit 81 reversely rotates, and one save and unloads all drilling rods 87, after drilling rod 87 and drill bit 81 all exit and bore cave 15, and brill coal-winning machine 10 integral forward lead, and stay the brill cave coal column 16 establishing one fixed width, enter next and circulate;
Wherein: the factors such as the continued access speed v of drilling rod 87 and drill bit 81 size power, coal petrography hardness are relevant, and in an embodiment, v value is 6 ~ 8min/ joint; Bore cave diameter d to be determined by coal seam thickness, be generally more or less the same, in an embodiment, coal seam belongs to girdle, and therefore d value is 600 ~ 1300mm; Bore cave degree of depth l to determine primarily of factors such as drilling rod 87 mechanical property, coal petrography hardness, in an embodiment, l value is 20 ~ 30m, when drilling rod pliability is high, the hardness of coal is less, bores cave degree of depth l and can reach more than 50m; The factors such as the main roof and floor integrality of cave coal pillar width b, wall rock condition of boring determine, in embodiment, b gets 200 ~ 300mm, and when roof and floor integrality is good, enclosing lithologies is harder, goaf is not caving, earth's surface is subzero heavy to stay the brill cave coal column 15 establishing rational width to realize.
3), coal natural repose angle is generally less than 45 °, the coal of extraction is under gravity along on the drag conveyor 11 bored immediately below cave 15 free-falling extremely, be scattered in outer coal and load drag conveyor 11 to manually, reprint subsequently on rubber conveyer 12, transport out haulage gate 13;
4) crossheading adopts rectangular cross section; During driving, crossheading adopts bolting with wire mesh mode, and during drilling, near drilling work plane 17, tunnel adopts hinged girder steel to coordinate firm hydraulic prop 7 to carry out local strengthening supporting;
5) goaf, after drilling adopts not supporting, the process of spontaneous caving method;
6), ventilate: adopt U-shaped draft type, this method of ventilation using through brill cave 15 as vent passages, freshly distinguished and admirablely enter into drilling work plane 17 by haulage gate 13, enter into the large lane of return air through several through brill caves 15 by air return way 14 and drain into returnairshaft, the reserved quantity n boring cave 15 is determined by factors such as coal-face Air Quantity Required, brill cave diameter d, for realizing safety in production, in low gaseous mine, n generally gets 3 or 4, need to increase vent passages quantity in right amount in highly gassy mine, and adopt booster to add forced ventilation; For all the other not as the brill cave of vent passages, the mode such as " meeting six to enter three ", " meeting entering the quater final " according to different coal geological conditions, can be adopted to carry out Seal treatment, utilize mobile brattice 19 to isolate goaf simultaneously and bore cave 15.As shown in Figure 5, adopt " meeting entering the quater final " mode to carry out process goaf in embodiment and to bore in cave 15, figure 1 ~ No. 7 and bore cave as vent passages, distinguished and admirablely enter into drilling work plane 17 via haulage gate 13, enter air return way 14 respectively through 1 ~ No. 7 brill cave; After No. 8 brill caves are formed through ventilation channel, bore cave to 1 ~ No. 4 and stamp airtight 18 in time, and mobile No. 19 to 5, brattice brill cave place carries out Seal treatment, to ensure that leaving at least 4 brill caves meets face-airing demand.
Claims (4)
1. a steeply inclined thin seam self-propelled simple drill coal-winning machine, is characterized in that: this brill coal-winning machine comprises: main frame, console, pumping plant, support hydraulic pressure column, crawler body, base, firm hydraulic prop, drilling tool assembly and spillplate; Main frame, console, pumping plant and drilling tool assembly are fixed on base, and firm hydraulic prop suit is fixed on base four angles, and base is connected with crawler body by four support hydraulic pressure columns; Spillplate is connected to the side of base, and the drill bit of drilling tool assembly stretches out spillplate.
2. steeply inclined thin seam self-propelled simple drill coal-winning machine according to claim 1, is characterized in that: described drilling tool assembly is made up of drill bit, bit adapter, high torque output shaft, planetary reduction gear, low torque input shaft, tool joint, drilling rod, drill rod connector and water injector; Drill bit, bit adapter, high torque output shaft, planetary reduction gear, low torque input shaft, tool joint and drilling rod are linked in sequence; Described drill bit adopts tapered drill bit, is connected with drilling rod by planetary reduction gear, and the high torque output shaft of planetary reduction gear is connected with drill bit by bit adapter, and low torque input shaft is connected with drilling rod by tool joint; Drilling rod adopts outer flush drill stem, and connected by drill rod connector between two drilling rods, drilling rod has many, and is linked in sequence successively; Described water injector is fixed on drilling rod inside.
3. steeply inclined thin seam self-propelled simple drill coal-winning machine according to claim 1, is characterized in that: described spillplate adopts all-transparent material to make.
4. utilize an exploitation method for steeply inclined thin seam self-propelled simple drill coal-winning machine described in claim 1, it is characterized in that, comprise the steps:
1), arrange in haulage gate and bore coal-winning machine, drag conveyor and rubber conveyer, place plant equipment in air return way, staff directly enters into drilling work plane by haulage gate, air return way only for ventilating, haul, not pedestrian;
2), regulate support hydraulic pressure stem height to carry out adjustment and bore coal-winning machine fuselage angle of inclination, drill bit and drilling rod is made to carry out brill coal by haulage gate to air return way along seam inclination direction, until crossheading is formed through brill cave up and down, exit after brill cave completely until drill bit and drilling rod, bore coal-winning machine integral forward lead, and stay to establish and bore cave coal column, enter next circulation;
3), the coal of extraction in drilling process under gravity along bore cave free-falling to immediately below drag conveyor on, be scattered in outer coal and load drag conveyor to manually, reprint on rubber conveyer subsequently, transport out haulage gate;
4), during driving, crossheading adopts bolting with wire mesh mode, and during drilling, near drilling work plane, tunnel adopts hinged girder steel to coordinate firm hydraulic prop to carry out local strengthening supporting;
5) goaf, after drilling adopts not supporting, the process of spontaneous caving method;
6), ventilate: adopt U-shaped draft type, freshly distinguished and admirablely enter into drilling work plane by haulage gate, brill cave after through enters into the large lane of return air by air return way and drains into returnairshaft, the quantity of the brill cave as vent passages need be increased when gas flowing in coal layer is larger, and adopt booster to add forced ventilation, stamp airtight to the brill cave not as vent passages, and adopt mobile brattice to isolate goaf brill cave in time, carry out Seal treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515189.8A CN104405385B (en) | 2014-09-29 | 2014-09-29 | A kind of steeply inclined thin seam self-propelled simple drill coal-winning machine and recovery method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515189.8A CN104405385B (en) | 2014-09-29 | 2014-09-29 | A kind of steeply inclined thin seam self-propelled simple drill coal-winning machine and recovery method |
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| CN104405385A true CN104405385A (en) | 2015-03-11 |
| CN104405385B CN104405385B (en) | 2016-06-08 |
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| CN104975855A (en) * | 2015-06-19 | 2015-10-14 | 黄斌 | Hole drilling machine for ore extraction |
| CN106677781A (en) * | 2017-01-25 | 2017-05-17 | 中国矿业大学 | Pressure-relieving and permeability-increasing method for drilling exploitation of ultra-thin coal seam |
| CN114893127A (en) * | 2022-07-14 | 2022-08-12 | 陕西太合工程技术服务有限责任公司 | Directional hydraulic drilling and mining integrated mining device and method for thin coal seam |
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| US3840270A (en) * | 1973-03-29 | 1974-10-08 | Us Navy | Tunnel excavation with electrically generated shock waves |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114893127A (en) * | 2022-07-14 | 2022-08-12 | 陕西太合工程技术服务有限责任公司 | Directional hydraulic drilling and mining integrated mining device and method for thin coal seam |
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| Publication number | Publication date |
|---|---|
| CN104405385B (en) | 2016-06-08 |
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