CN105951861A - Lateral freezing bottom-making water stop structure for underground excavated foundation pit of urban sensitive area and method - Google Patents
Lateral freezing bottom-making water stop structure for underground excavated foundation pit of urban sensitive area and method Download PDFInfo
- Publication number
- CN105951861A CN105951861A CN201610467178.6A CN201610467178A CN105951861A CN 105951861 A CN105951861 A CN 105951861A CN 201610467178 A CN201610467178 A CN 201610467178A CN 105951861 A CN105951861 A CN 105951861A
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- China
- Prior art keywords
- pipe
- freezing
- foundation ditch
- city
- underground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/14—Restraining of underground water by damming or interrupting the passage of underground water by freezing the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Abstract
The invention discloses a lateral freezing bottom-making water stop structure for an underground excavated foundation pit of an urban sensitive area and a method. The water stop structure comprises side face dredging pipes, freezing structures between piles in row, side face construction troughs and a foundation pit bottom freezing bottom-making structure. The side face dredging pipes are distributed in a rectangular shape and surround the outer sides of the freezing structures between piles in row. The freezing structures between piles in row are composed of piles-in-row structures and freezing wall structures which are distributed in a rectangular shape. The side face construction troughs are arranged along the outer sides of the short rectangular edges of the freezing structures between piles in row. The foundation pit bottom freezing bottom-making structure is connected with the bottoms of the side face construction troughs and inclines by an angle. A closed water stop space is formed by freezing walls formed by the foundation pit bottom freezing bottom-making structure and the freezing structures between piles in row.
Description
Technical field
The present invention relates to city Deep Underground Space excavation supporting technical field, particularly relate to a kind of city
Tunneling foundation ditch in sensitizing range laterally freezes to make end water-bound and method.
Background technology
Along with the development of Chinese society economy, urban population quickly increases, and life area is corresponding per capita
Reducing, this makes urban land area be progressively changed into solid space development by planar development, i.e. limited
Urban space in, Devoting Major Efforts To Developing and utilize urban underground space, along with the continuous increasing of cutting depth
Adding, underground engineering will face the problems such as highland pressure, high hydraulic pressure, and this also causes tradition method for protecting support inapplicable
Deeper subsurface environment, for this reason, it may be necessary to introduce new support pattern.
In numerous urban underground space method for protecting support, campshed method is simple, convenient with its construction, low cost
The advantage such as honest and clean is used widely, but campshed is as a kind of supporting construction, is used only to provide lateral
Protecting power, along with the increase of the pattern foundation pit supporting structure degree of depth, inevitably there is groundwater level, just need in top, the end, hole
Campshed is combined with other sealing means.
In sensitizing range, city, if using the mode of artificial rainmaking, inevitably shape around foundation ditch
Become precipitation funnel, the destruction of existing pipeline can be caused；Ground settlement also can cause ground settlement, causes
Subsiding of road.Therefore, artificial rainmaking to be taked is firstly the need of possessing certain surface condition, quick in city
Sensillary area, improper employing.The city lacked for water resources such as Beijing, self water source meets city the most not
The needs of city's development, need to supplement urban water resource by engineerings such as the south water to north, the cost of subsoil water itself
Higher, for level of ground water higher in the case of, artificial rainmaking by after a large amount of groundwater minings row arrive city
Sewage conduct, also can produce huge waste, also be unfavorable for urban development.At city central area, a lot
Local the most do not possess basic ground supporting condition.
The sealing mode that comprehensive analysis is existing, it is seen that freezing process is maximally effective deep formation sealing side
Method, is widely used in coal mine shaft lining construction, and since nineteen fifty-five, China introduces construction freezing method skill first
Since art, more than 700 pit shaft has been had to use construction freezing method, it can be seen that, freezing process is used for city
In the preventing leaking water engineering of underground, city, it is feasible technically, it should be noted that deep, city underground engineering
Ground environment and technology require far different than coal mine shaft lining, can not copy slavishly, need to combine Urban Underground
The feature of engineering improves freezing technology.
It is desirable to there is a kind of city sensitizing range tunneling foundation ditch laterally to freeze to make end water-bound and method knot
Close campshed method and the advantage of freezing process and the suitability, solve side and exist bottom two-layer water table aquifer and foundation ditch not
There is impermeable stratum or the deeper operating mode problem of impermeable stratum.
Summary of the invention
It is an object of the invention to provide a kind of sensitizing range, city tunneling foundation ditch laterally to freeze to make end water knot
Structure and method overcome the above-mentioned problems in the prior art.
For achieving the above object, the present invention provides a kind of sensitizing range, city tunneling foundation ditch laterally to freeze to make the end
Water sealing structure includes: freeze bottom frozen structure, side construction groove and foundation ditch between side dredging pipe, campshed
Make bottom structure, the rectangular distribution of dredging pipe of described side, and around outside frozen structure between described campshed
Side is arranged；Between described campshed, frozen structure is piling structure and the rectangular distribution of frost wall structure；Described side
Surface construction groove is arranged along the outside of the rectangle minor face of frozen structure between described campshed；Freeze bottom described foundation ditch
Make bottom structure and connect bottom the setting of inclined angle of described side construction groove, freeze bottom described foundation ditch
Make the frost wall that between bottom structure and described campshed, frozen structure is formed and form the sealing space of Guan Bi.
Preferably, described side dredging pipe penetrates the impermeable stratum on top, underground, deep of sensitizing range, city
Arrange, and connect upper strata water table aquifer and lower floor's diving of underground, described deep, upper strata groundwater level is dropped
As little as lower floor's groundwater level.
Preferably, described frost wall structure is arranged between each piling structure described.
Preferably, freeze to make bottom structure bottom described frost wall structure and foundation ditch to include respectively: freezing pipe,
Feed tube, drain pipe, liquid distribution pipe, refrigeration plant and collector tube, described feed tube and drain pipe are arranged on institute
Stating in freezing pipe, one end of described feed tube connects described liquid distribution pipe, and described liquid distribution pipe connects described refrigeration
Stand；One end of described drain pipe connects described collector tube, and described collector tube connects described refrigeration plant, described
Liquid distribution pipe and collector tube are formed and freeze loop.
Preferably, the degree of depth of described side construction groove is to top, underground, deep impermeable of sensitizing range, city
The bottom of water layer.
Tunneling foundation ditch in sensitizing range, city laterally freezes to make end water-stopping method and comprises the following steps:
(1) at side in rectangular layout, the periphery of foundation ditch dredging pipe, it is quick that described side dredging pipe penetrates city
The impermeable stratum of the underground, deep in sensillary area territory；
(2) along described side dredging pipe rectangle minor face excavation side, inner side construction groove, described side is executed
The degree of depth of work groove excavation is to the bottom of the impermeable stratum on the top, underground, deep of sensitizing range, city；
(3) pile body construction: select different construction machineries according to different pile modes, it has been determined that
Stake point construction pile；
(4) freezing hole and freeze network construction: between pile body and described side construction groove oblique drilling hole extremely
The freezing pipe freezing to make in bottom structure bottom the foundation ditch that designated depth is formed is inserted into feed tube and liquid back pipe,
One end of described feed tube connects described liquid distribution pipe, and described liquid distribution pipe connects described refrigeration plant；Described go out liquid
One end of pipe connects described collector tube, and described collector tube connects described refrigeration plant, described liquid distribution pipe and liquid collecting
Pipe is formed and freezes loop；
(5) formation of frost wall: treat that described pile body and freezing pipe have been constructed, after inspection, starts
Described refrigeration plant, makes low temperature CaCl2Solution circulates in described freezing pipe, buries in advance by measuring and analyzing
The temperature tube put and hydrology pipe data, determine temperature and the thickness of frost wall, when reaching design and requiring,
Can carry out Underground Engineering Excavation work, the degree of depth of outside frost wall starts at the bottom of foundation ditch from lower floor's groundwater level
Portion, the interior oblique frost wall degree of depth freezing to make bottom structure bottom foundation ditch starts to foundation ditch bottom foundation ditch
Portion；
(6) freezing pipe reclaims: after underground structure has been constructed, and nature can be used to thaw or the quickest
The scheme thawed recovers Groundwater Flow, extracts described freezing pipe, manually backfills freezing hole, complete
Become whole underground engineering construction operation.
The invention provides a kind of sensitizing range, city tunneling foundation ditch laterally to freeze to make end water-bound and side
Method, to freeze to make underground, the deep sealing of bottom structure be a kind of fabricated structure to the foundation ditch that has of the present invention, knot
Close campshed method and the advantage of freezing process and the suitability, solve side and exist bottom two-layer water table aquifer and foundation ditch not
There is impermeable stratum or the deeper operating mode problem of impermeable stratum.
Accompanying drawing explanation
Fig. 1 is that tunneling foundation ditch in sensitizing range, city laterally freezes to make the side dredging pipe of end water-bound and freezes
Knot bank of tubes pilework schematic diagram.
Fig. 2 is the generalized section that tunneling foundation ditch in sensitizing range, city laterally freezes to make end water-bound.
Fig. 3 is that tunneling foundation ditch in sensitizing range, city laterally freezes to make end water-bound freezing pipe frozen construction
Schematic diagram.
Detailed description of the invention
Clearer, below in conjunction with the present invention for the purpose making the present invention implement, technical scheme and advantage
Accompanying drawing in embodiment, is further described in more detail the technical scheme in the embodiment of the present invention.Attached
In figure, the most same or similar label represents same or similar element or has same or like
The element of function.Described embodiment is a part of embodiment of the present invention rather than whole enforcement
Example.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to be used for explaining the present invention, and
It is not considered as limiting the invention.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into present invention protection
Scope.Below in conjunction with the accompanying drawings embodiments of the invention are described in detail.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " horizontal stroke
To ", "front", "rear", "left", "right", " vertically ", " level ",
" push up ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship are based on shown in the drawings
Orientation or position relationship, be for only for ease of the description present invention and simplify description rather than instruction or hint
The device of indication or element must have specific orientation, with specific azimuth configuration and operation, the most not
It is understood that as limiting the scope of the invention.
In the present invention one broad embodiment: the present invention provides a kind of sensitizing range, city tunneling foundation ditch lateral
Freeze to make end water-bound to include: frozen structure, side construction groove and foundation ditch between side dredging pipe, campshed
Bottom structure, the rectangular distribution of dredging pipe of described side are freezed to make in bottom, and freeze around between described campshed
The outside of structure is arranged；Between described campshed, frozen structure is piling structure and rectangular point of frost wall structure
Cloth；Construction groove in described side is arranged along the outside of the rectangle minor face of frozen structure between described campshed；Described base
Freeze to make bottom structure bottom hole and connect bottom the setting of inclined angle, the described base of described side construction groove
Freeze to make the frost wall that between bottom structure and described campshed, frozen structure is formed bottom hole and form the sealing sky of Guan Bi
Between.
In another broad embodiment of the present invention: the present invention provides a kind of sensitizing range, city tunneling foundation ditch side
Comprise the following steps to freezing to make end water-stopping method:
(1) at side in rectangular layout, the periphery of foundation ditch dredging pipe, it is quick that described side dredging pipe penetrates city
The impermeable stratum on the top, underground, deep in sensillary area territory；
(2) along described side dredging pipe rectangle minor face excavation side, inner side construction groove, described side is executed
The degree of depth of work groove excavation is to the bottom of the impermeable stratum on the top, underground, deep of sensitizing range, city；
(3) pile body construction: select different construction machineries according to different pile modes, it has been determined that
Stake point construction pile；
(4) freezing hole and freeze network construction: between pile body and described side construction groove oblique drilling hole extremely
The freezing pipe freezing to make in bottom structure bottom the foundation ditch that designated depth is formed is inserted into feed tube and liquid back pipe,
One end of described feed tube connects described liquid distribution pipe, and described liquid distribution pipe connects described refrigeration plant；Described go out liquid
One end of pipe connects described collector tube, and described collector tube connects described refrigeration plant, described liquid distribution pipe and liquid collecting
Pipe is formed and freezes loop；
(5) formation of frost wall: treat that described pile body and freezing pipe have been constructed, after inspection, starts
Described refrigeration plant, makes low temperature CaCl2Solution circulates in described freezing pipe, buries in advance by measuring and analyzing
The temperature tube put and hydrology pipe data, determine temperature and the thickness of frost wall, when reaching design and requiring,
Can carry out Underground Engineering Excavation work, the degree of depth of outside frost wall starts at the bottom of foundation ditch from lower floor's groundwater level
Portion, the interior oblique frost wall degree of depth freezing to make bottom structure bottom foundation ditch starts to foundation ditch bottom foundation ditch
Portion；
(6) freezing pipe reclaims: after underground structure has been constructed, and nature can be used to thaw or the quickest
The scheme thawed recovers Groundwater Flow, extracts described freezing pipe, manually backfills freezing hole, complete
Become whole underground engineering construction operation.
As Figure 1-3, sensitizing range tunneling foundation ditch in described city laterally freezes to make end water-bound bag
Include: freeze to make bear building-up bottom frozen structure, side construction groove 2 and foundation ditch between side dredging pipe 1, campshed
Structure, the rectangular distribution of described side dredging pipe 1, and set around the outside of frozen structure between described campshed
Put；Between described campshed, frozen structure is piling structure 4 and the rectangular distribution of frost wall structure；Described side
Construction groove 2 is arranged along the outside of the rectangle minor face of frozen structure between described campshed；Freeze bottom described foundation ditch
Make bottom structure and connect bottom the setting of inclined angle of described side construction groove 2, freeze bottom described foundation ditch
Knot is made the frost wall that between bottom structure and described campshed, frozen structure is formed and is formed the sealing space of Guan Bi.
As shown in Figures 2 and 3, described side dredging pipe 1 penetrates the top, underground, deep of sensitizing range, city
Impermeable stratum arrange, and connect the upper strata water table aquifer of underground, described deep and lower floor's diving, by upper strata
Groundwater level is reduced to lower floor's groundwater level.
As it is shown in figure 1, described frost wall structure is arranged between each piling structure 4 described.
Freeze to make bottom structure bottom described frost wall structure and foundation ditch to include respectively: freezing pipe 3, feed liquor
Pipe, drain pipe, liquid distribution pipe, refrigeration plant and collector tube, described feed tube and drain pipe be arranged on described in freeze
In knot pipe 3, one end of described feed tube connects described liquid distribution pipe, and described liquid distribution pipe connects described refrigeration
Stand；One end of described drain pipe connects described collector tube, and described collector tube connects described refrigeration plant, described
Liquid distribution pipe and collector tube are formed and freeze loop.
As shown in Figures 2 and 3, the degree of depth of described side construction groove 2 is to the underground, deep of sensitizing range, city
The bottom of the impermeable stratum on top.
Tunneling foundation ditch in sensitizing range, city laterally freezes to make end water-stopping method and comprises the following steps:
(1) at side in rectangular layout, the periphery of foundation ditch dredging pipe, it is quick that described side dredging pipe penetrates city
The impermeable stratum on the top, underground, deep in sensillary area territory；
(2) along described side dredging pipe rectangle minor face excavation side, inner side construction groove, described side is executed
The degree of depth of work groove excavation is to the bottom of the impermeable stratum on the top, underground, deep of sensitizing range, city；
(3) pile body construction: select different construction machineries according to different pile modes, it has been determined that
Stake point construction pile；
(4) freezing hole and freeze network construction: between pile body and described side construction groove oblique drilling hole extremely
The freezing pipe freezing to make in bottom structure bottom the foundation ditch that designated depth is formed is inserted into feed tube and liquid back pipe,
One end of described feed tube connects described liquid distribution pipe, and described liquid distribution pipe connects described refrigeration plant；Described go out liquid
One end of pipe connects described collector tube, and described collector tube connects described refrigeration plant, described liquid distribution pipe and liquid collecting
Pipe is formed and freezes loop；
(5) formation of frost wall: treat that described pile body and freezing pipe have been constructed, after inspection, starts
Described refrigeration plant, makes low temperature CaCl2Solution circulates in described freezing pipe, buries in advance by measuring and analyzing
The temperature tube put and hydrology pipe data, determine temperature and the thickness of frost wall, when reaching design and requiring,
Can carry out Underground Engineering Excavation work, the degree of depth of outside frost wall starts at the bottom of foundation ditch from lower floor's groundwater level
Portion, the interior oblique frost wall degree of depth freezing to make bottom structure bottom foundation ditch starts to foundation ditch bottom foundation ditch
Portion；
(6) freezing pipe reclaims: after underground structure has been constructed, and nature can be used to thaw or the quickest
The scheme thawed recovers Groundwater Flow, extracts described freezing pipe, manually backfills freezing hole, complete
Become whole underground engineering construction operation.
Side dredging pipe UNICOM levels diving, makes upper strata phreatic table fall to lower floor；Campshed rises goes along with sb. to guard him base
Cheat stable effect；The frost wall of the freezing pipe formation of campshed periphery and side construction diagonally disposed the freezing of groove
The knot pipe oblique end of making, forms the sealing space of a Guan Bi.After construction completes, can by naturally thawing or
Artificial quick-thawing, recovers former Groundwater Flow path, and groundwater environment is not caused by whole work progress
Impact；And the temperature-controllable of frost wall, rational project of shaft freezing and Design of Construction Organization can be effective
Reduce and freeze required electric energy.
Last it is noted that above example is only in order to illustrate technical scheme, rather than right
It limits.Although the present invention being described in detail with reference to previous embodiment, the common skill of this area
Art personnel it is understood that the technical scheme described in foregoing embodiments still can be modified by it,
Or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make corresponding
The essence of technical scheme departs from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. sensitizing range tunneling foundation ditch in a city laterally freezes to make end water-bound, it is characterised in that
Including: freeze to make bear building-up bottom frozen structure, side construction groove and foundation ditch between side dredging pipe, campshed
Structure, the rectangular distribution of dredging pipe of described side, and set around the outside of frozen structure between described campshed
Put；Between described campshed, frozen structure is piling structure and the rectangular distribution of frost wall structure；Described side is executed
Work groove is arranged along the outside of the rectangle minor face of frozen structure between described campshed；Freeze to make the end bottom described foundation ditch
Structure connects bottom the setting of inclined angle of described side construction groove, freezes to make the end bottom described foundation ditch
The frost wall that between structure and described campshed, frozen structure is formed forms the sealing space of Guan Bi.
2. tunneling foundation ditch in sensitizing range, city as claimed in claim 1 laterally freezes to make end water-bound,
It is characterized in that: described side dredging pipe penetrates the impermeable stratum on the top, underground, deep of sensitizing range, city
Arrange, and connect upper strata water table aquifer and lower floor's diving of underground, described deep, upper strata groundwater level is dropped
As little as lower floor's groundwater level.
3. tunneling foundation ditch in sensitizing range, city as claimed in claim 1 laterally freezes to make end water-bound,
It is characterized in that: described frost wall structure is arranged between each piling structure described.
4. tunneling foundation ditch in sensitizing range, city as claimed in claim 3 laterally freezes to make end water-bound,
It is characterized in that: freeze to make bottom structure bottom described frost wall structure and foundation ditch and include respectively: freezing pipe,
Feed tube, drain pipe, liquid distribution pipe, refrigeration plant and collector tube, described feed tube and drain pipe are arranged on institute
Stating in freezing pipe, one end of described feed tube connects described liquid distribution pipe, and described liquid distribution pipe connects described refrigeration
Stand；One end of described drain pipe connects described collector tube, and described collector tube connects described refrigeration plant, described
Liquid distribution pipe and collector tube are formed and freeze loop.
5. tunneling foundation ditch in sensitizing range, city as claimed in claim 1 laterally freezes to make end water-bound,
It is characterized in that: top, underground, deep impermeable of the degree of depth of described side construction groove to sensitizing range, city
The bottom of water layer.
6. sensitizing range tunneling foundation ditch in a city laterally freezes to make end water-stopping method, it is characterised in that bag
Include following steps:
(1) at side in rectangular layout, the periphery of foundation ditch dredging pipe, it is quick that described side dredging pipe penetrates city
The impermeable stratum on the top, underground, deep in sensillary area territory；
(2) along described side dredging pipe rectangle minor face excavation side, inner side construction groove, described side is executed
The degree of depth of work groove excavation is to the bottom of the impermeable stratum on the top, underground, deep of sensitizing range, city；
(3) pile body construction: select different construction machineries according to different pile modes, it has been determined that
Stake point construction pile；
(4) freezing hole and freeze network construction: between pile body and described side construction groove oblique drilling hole extremely
The freezing pipe freezing to make in bottom structure bottom the foundation ditch that designated depth is formed is inserted into feed tube and liquid back pipe,
One end of described feed tube connects described liquid distribution pipe, and described liquid distribution pipe connects described refrigeration plant；Described go out liquid
One end of pipe connects described collector tube, and described collector tube connects described refrigeration plant, described liquid distribution pipe and liquid collecting
Pipe is formed and freezes loop；
(5) formation of frost wall: treat that described pile body and freezing pipe have been constructed, after inspection, starts
Described refrigeration plant, makes low temperature CaCl2Solution circulates in described freezing pipe, buries in advance by measuring and analyzing
The temperature tube put and hydrology pipe data, determine temperature and the thickness of frost wall, when reaching design and requiring,
Can carry out Underground Engineering Excavation work, the degree of depth of outside frost wall starts at the bottom of foundation ditch from lower floor's groundwater level
Portion, the interior oblique frost wall degree of depth freezing to make bottom structure bottom foundation ditch starts to foundation ditch bottom foundation ditch
Portion；
(6) freezing pipe reclaims: after underground structure has been constructed, and nature can be used to thaw or the quickest
The scheme thawed recovers Groundwater Flow, extracts described freezing pipe, manually backfills freezing hole, complete
Become whole underground engineering construction operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610467178.6A CN105951861A (en) | 2016-06-24 | 2016-06-24 | Lateral freezing bottom-making water stop structure for underground excavated foundation pit of urban sensitive area and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610467178.6A CN105951861A (en) | 2016-06-24 | 2016-06-24 | Lateral freezing bottom-making water stop structure for underground excavated foundation pit of urban sensitive area and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105951861A true CN105951861A (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610467178.6A Pending CN105951861A (en) | 2016-06-24 | 2016-06-24 | Lateral freezing bottom-making water stop structure for underground excavated foundation pit of urban sensitive area and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110939149A (en) * | 2019-12-13 | 2020-03-31 | 陈忠响 | Foundation pit water-resisting and water-reducing method |
| CN114352287A (en) * | 2021-12-17 | 2022-04-15 | 贵州盘江煤电集团技术研究院有限公司 | Water prevention and control method for coal mining working face of coal mine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110939149B (en) * | 2019-12-13 | 2021-03-23 | 陈忠响 | Foundation pit water-resisting and water-reducing method |
| CN114352287A (en) * | 2021-12-17 | 2022-04-15 | 贵州盘江煤电集团技术研究院有限公司 | Water prevention and control method for coal mining working face of coal mine |
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Inventor after: Zhang Jinxun Inventor after: Jiang Hua Inventor after: Jiang Yusheng Inventor after: Dan Renliang Inventor after: Yang Hao Inventor after: Yang Zhiyong Inventor after: Dong Linwei Inventor before: Zhang Jinxun Inventor before: Jiang Hua Inventor before: Jiang Yusheng Inventor before: Dan Renliang Inventor before: Dong Linwei |
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Application publication date: 20160921 |