CN103742127A - Drill-hole television detection determination method for heights of overlying-strata caving zone and diversion fissure zone - Google Patents
Drill-hole television detection determination method for heights of overlying-strata caving zone and diversion fissure zone Download PDFInfo
- Publication number
- CN103742127A CN103742127A CN201410022317.5A CN201410022317A CN103742127A CN 103742127 A CN103742127 A CN 103742127A CN 201410022317 A CN201410022317 A CN 201410022317A CN 103742127 A CN103742127 A CN 103742127A
- Authority
- CN
- China
- Prior art keywords
- boring
- zone
- described boring
- height
- crack
- 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.)
- Granted
Links
Images
Abstract
A drill-hole television detection determination method for heights of an overlying-strata caving zone and a diversion fissure zone includes (1), punching on a working face; (2), detecting from the top end to the bottom end of a drill hole and recording features of an inner wall; (3), performing statistical analysis on the number of fractures; (4), determining a drill-hole upper limit position as the peak of the diversion fissure zone; (5), determining an drill-hole upper limit position as the peak of the caving zone; (6), acquiring the height of the diversion fissure zone according to the formula that H1=H-h1+W; (7), acquiring the height of the caving zone according to the formula that Hm=H-h2+W. In the step (4), the drill-hole upper limit position shall satisfy the conditions including that (a), the number of the fractures reach 10 pieces/m; (b), fractures with inclinations larger than 50 degrees account for more than 50% of the total; (c), the average width of the fractures reaches 20mm. In the step (5), the drill-hole upper limit position shall satisfy the conditions including that (a), the number of the fractures reach 20 pieces/m; (b), fractures with inclinations larger than 80 degrees account for more than 50% of the total; (c), the average width of the fractures reaches 40mm. The drill-hole television detection determination method can provide scientific and reliable engineering design data for underwater coal mining.
Description
Technical field
The present invention relates to a kind of overlying strata caving zone and height of water flowing fractured zone and determine method, particularly a kind of overlying strata caving zone and height of water flowing fractured zone borehole television are surveyed the method for determining.
Background technology
Overburden Rock Failure height and feature refer to formed caving zone and height of water flowing fractured zone after seam mining, and the feature that in boring, rock crack is grown.Overburden Rock Failure height and feature are to determine that under water body, safety pillar under wa ter bodies stays the major parameter of establishing height, are the keys that realizes safety coal mining under nearly water body.
Surface drilling observation procedure for Overburden Rock Failure height and feature is mainly to determine by drilling fluid wastage and drilling water level observation at present.Be by the drilling fluid consumption in direct mensuration drilling process, drilling water level, rate of penetration, bit freezing, fall a kind of method that the data such as brill, boring air draught, core observation and geologic description are come synthetic determination caving zone and height of water flowing fractured zone and destructive characteristics thereof.Height of water flowing fractured zone be mainly according to drilling fluid consumption and surrounding rock body particularly overlying strata occur to destroy and the result such as drilling water level observation is determined; Caving zone height is determined according to creeping into anomaly.
The major advantage of drilling fluid method is that simple, easy to operate, reliable, practical, observation data can reflect actual water guide situation.Shortcoming is mainly often can not obtain authentic data in the area of some protolith cranny development, to holding having relatively high expectations of observation opportunity; Not water guide crack for poor connectivity is just difficult to observation out; Can not obtain the distribution characteristics such as drill hole inner wall Fracture Width, length, broken situation.Quantitative description is carried out in the crack that more can not grow drill hole inner wall.
Summary of the invention
In order to solve prior art, affected by overlying strata natural characteristic when definite Overburden Rock Failure height and the feature larger, and the problem that cannot carry out quantitative analysis, the invention provides a kind of overlying strata caving zone and height of water flowing fractured zone borehole television and survey the method for determining.
The technical solution used in the present invention is as follows:
Overlying strata caving zone and height of water flowing fractured zone borehole television are surveyed the method for determining, comprise the following steps:
(1) above stope, punch, described boring connects ground and described stope, and described boring and beginning line horizontal range are greater than 30m, are greater than 15m with terminal line horizontal range, is all greater than 10m with return airway and transportation lane horizontal range;
(2) after described boring completes, adopt boring color TV, from described drill tip, start, until crack detection is carried out to described boring in bottom, by the mode of recording a video or taking pictures, to record the accurate location of lithology, joint, crack, absciss layer and the water level of described drill hole inner wall rock stratum;
(3) according to recording result, the width in the inclination angle in the quantity in described drill hole inner wall crack, crack and crack is carried out to statistical analysis;
(4) according to statistic analysis result, to meet (a) described crack quantity simultaneously and reach 10/m, (b) inclination angle is greater than the described crack of 50 ° and surpasses 50% of total amount, and the described boring upper limit position that (c) described crack mean breadth reaches tri-conditions of 20mm is defined as the summit of water flowing fractured zone;
(5) according to statistic analysis result, to meet (a) described crack quantity simultaneously and reach 20/m, (b) inclination angle is greater than the described crack of 80 ° and surpasses 50% of total amount, and the described boring upper limit position that (c) described crack mean breadth reaches tri-conditions of 40mm is defined as the summit of caving zone;
(6) according to formula H
l=H-h
1+ W calculates the height of water flowing fractured zone of described bore position, wherein, and H
lfor described height of water flowing fractured zone; H is described drill tip and described stope top vertical distance, h
1for the summit of described water flowing fractured zone and the vertical distance of described drill tip, W is the total sinking in earth's surface of described boring position;
(7) according to formula H
m=H-h
2+ W calculates the caving zone height of described bore position, wherein, and H
mfor described caving zone height; H is described drill tip and described stope top vertical distance, h
2for the summit of described caving zone and the vertical distance of described drill tip, W is the total sinking in earth's surface of described boring position.
At above-mentioned overlying strata caving zone and height of water flowing fractured zone borehole television, survey in the method for determining, along described stope incline direction, the described boring number of getting is no less than 3, along described stope, is moving towards direction, be no less than equally 3, described bore diameter is not less than 91mm.
At above-mentioned overlying strata caving zone and height of water flowing fractured zone borehole television, survey in the method for determining, in punching process, for unconsolidated formation and aquifer in the overlying strata that are exposed in described boring, by setting of casing, seal.
At above-mentioned overlying strata caving zone and height of water flowing fractured zone borehole television, survey in the method for determining, after having punched, described boring is cleaned until inject no longer feculence of clear water in described boring.
At above-mentioned overlying strata caving zone and height of water flowing fractured zone borehole television, survey in the method for determining, described boring color TV comprises controller, depth calculation device, monitor and probe.
Technique scheme of the present invention has the following advantages compared to existing technology:
Overlying strata caving zone provided by the invention and height of water flowing fractured zone borehole television are surveyed the method for determining, owing to providing quantitative definite overlying strata caving zone and the criterion on water flowing fractured zone summit and the design formulas of definite overlying strata caving zone and height of water flowing fractured zone on the basis adopting color TV to survey, therefore, the present invention can provide the more reliable engineering design data of science for carrying out coal mining under nearly water body, both guaranteed coal mine production safety, save coal resources simultaneously, reduce production costs, improve Business Economic Benefit.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is that overlying strata caving zone of the present invention and height of water flowing fractured zone borehole television are surveyed drilling horizontal position view in the method for determining;
Fig. 2 is that overlying strata caving zone of the present invention and height of water flowing fractured zone borehole television are surveyed employing boring color TV detection boring schematic diagram in the method for determining.
In figure, be labeled as: 1-beginning line, 2-terminal line, 3-return airway, 4-transports lane, 5-boring, 6-controller, 7-depth calculation device, 8-monitor, 9-probe, 10-stope.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
As depicted in figs. 1 and 2, be the preferred embodiment that overlying strata caving zone of the present invention and height of water flowing fractured zone borehole television are surveyed the method for determining.
Described overlying strata caving zone and height of water flowing fractured zone borehole television are surveyed the method for determining, comprise the following steps:
(1) above stope 10, get boring 5, described boring 5 connects ground and described stope 10, described boring 5 is greater than 30m with beginning line 1 horizontal range, is greater than 15m with terminal line 2 horizontal ranges, is all greater than 10m with return airway 3 and transportation lane 4 horizontal ranges;
(2) after described boring 5 completes, adopt boring color TV, from described boring 5 tops, start until crack detection is carried out to described boring 5 in bottom, by the mode of recording a video or taking pictures, record the accurate location of lithology, joint, crack, absciss layer and the water level of described boring 5 inwall rock stratum;
(3) according to recording result, to described boring 5 quantity in inwall crack, the width in the inclination angle in crack and crack carries out statistical analysis;
(4) according to statistic analysis result, to meet (a) described crack quantity simultaneously and reach 10/m, (b) inclination angle is greater than the described crack of 50 ° and surpasses 50% of total amount, and described boring 5 upper limit positions that (c) described crack mean breadth reaches tri-conditions of 20mm are defined as the summit of water flowing fractured zone;
(5) according to statistic analysis result, to meet (a) described crack quantity simultaneously and reach 20/m, (b) inclination angle is greater than the described crack of 80 ° and surpasses 50% of total amount, and described boring 5 upper limit positions that (c) described crack mean breadth reaches tri-conditions of 40mm are defined as the summit of caving zone;
(6) according to formula H
l=H-h
1+ W calculates the height of water flowing fractured zone of described boring 5 positions, wherein, and H
lfor described height of water flowing fractured zone; H is described boring 5 tops and described stope 10 top vertical distances, h
1for the vertical distance on summit and described boring 5 tops of described water flowing fractured zone, W is the total sinking in earth's surface of described boring 5 present positions;
(7) according to formula H
m=H-h
2+ W calculates the caving zone height of described boring 5 positions, wherein, and H
mfor described caving zone height; H is described boring 5 tops and described stope 10 top vertical distances, h
2for the vertical distance on summit and described boring 5 tops of described caving zone, W is the total sinking in earth's surface of described boring 5 positions.
In the present embodiment, along described stope 10 incline directions, described boring 5 numbers of getting are 3, along described stope 10, are moving towards direction, are similarly 3, and described boring 5 diameters are 100mm.
In the present embodiment, in punching process, for unconsolidated formation and aquifer in the overlying strata that are exposed in described boring 5, by setting of casing, seal.
In the present embodiment, after having punched, described boring 5 is cleaned until inject no longer feculence of clear water in described boring 5.
In the present embodiment, described boring color TV comprises controller 6, depth calculation device 7, monitor 8 and probe 9.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among protection scope of the present invention.
Claims (6)
1. overlying strata caving zone and height of water flowing fractured zone borehole television are surveyed the method for determining, it is characterized in that: comprise the following steps:
(1) in stope (10) top, get boring (5), described boring (5) connects ground and described stope (10), described boring (5) is greater than 30m with beginning line (1) horizontal range, be greater than 15m with terminal line (2) horizontal range, be all greater than 10m with return airway (3) and transportation lane (4) horizontal range;
(2) after described boring (5) completes, adopt boring color TV, from described boring (5) top, start, until crack detection is carried out to described boring (5) in bottom, by the mode of recording a video or taking pictures, to record the accurate location of lithology, joint, crack, absciss layer and the water level of described boring (5) inwall rock stratum;
(3), according to recording result, the quantity in described boring (5) inwall crack, the inclination angle in crack and the width in crack are carried out to statistical analysis;
(4) according to statistic analysis result, to meet (a) described crack quantity simultaneously and reach 10/m, (b) inclination angle is greater than the described crack of 50 ° and surpasses 50% of total amount, and described boring (5) upper limit position that (c) described crack mean breadth reaches tri-conditions of 20mm is defined as the summit of water flowing fractured zone;
(5) according to statistic analysis result, to meet (a) described crack quantity simultaneously and reach 20/m, (b) inclination angle is greater than the described crack of 80 ° and surpasses 50% of total amount, and described boring (5) upper limit position that (c) described crack mean breadth reaches tri-conditions of 40mm is defined as the summit of caving zone;
(6) according to formula H
l=H-h
1+ W calculates the height of water flowing fractured zone of described boring (5) position, wherein, and H
lfor described height of water flowing fractured zone; H is described boring (5) top and described stope (10) top vertical distance, h
1for the vertical distance on summit and described boring (5) top of described water flowing fractured zone, W is the total sinking in earth's surface of described boring (5) present position;
(7) according to formula H
m=H-h
2+ W calculates the caving zone height of described boring (5) position, wherein, and H
mfor described caving zone height; H is described boring (5) top and described stope (10) top vertical distance, h
2for the vertical distance on summit and described boring (5) top of described caving zone, W is the total sinking in earth's surface of described boring (5) position.
2. overlying strata caving zone according to claim 1 and height of water flowing fractured zone borehole television are surveyed the method for determining, it is characterized in that: along described stope (10) incline direction, described boring (5) number of getting is no less than 3, along described stope (10), moving towards direction, be no less than equally 3, described boring (5) diameter is not less than 91mm.
3. overlying strata caving zone according to claim 2 and height of water flowing fractured zone borehole television are surveyed the method for determining, it is characterized in that: along described stope (10) incline direction, described boring (5) number of getting is 3, along described stope (10), moving towards direction, be similarly 3, described boring (5) diameter is 100mm.
4. overlying strata caving zone according to claim 3 and height of water flowing fractured zone borehole television are surveyed the method for determining, it is characterized in that: in punching process, for unconsolidated formation and aquifer in the overlying strata that are exposed in described boring (5), by setting of casing, seal.
5. overlying strata caving zone according to claim 4 and height of water flowing fractured zone borehole television are surveyed the method for determining, it is characterized in that: after having punched, described boring (5) is cleaned until inject no longer feculence of the interior clear water of described boring (5).
6. overlying strata caving zone according to claim 5 and height of water flowing fractured zone borehole television are surveyed the method for determining, it is characterized in that: described boring color TV comprises controller (6), depth calculation device (7), monitor (8) and probe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022317.5A CN103742127B (en) | 2014-01-20 | 2014-01-20 | A kind of overlying strata caving zone and height of water flowing fractured zone Drill-hole television detection determination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022317.5A CN103742127B (en) | 2014-01-20 | 2014-01-20 | A kind of overlying strata caving zone and height of water flowing fractured zone Drill-hole television detection determination method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103742127A true CN103742127A (en) | 2014-04-23 |
| CN103742127B CN103742127B (en) | 2016-12-07 |
Family
ID=50499181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410022317.5A Expired - Fee Related CN103742127B (en) | 2014-01-20 | 2014-01-20 | A kind of overlying strata caving zone and height of water flowing fractured zone Drill-hole television detection determination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103742127B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405372A (en) * | 2014-09-28 | 2015-03-11 | 河南理工大学 | Method for testing vertical three zone heights of stope cover rock based on high level borehole flow |
| CN105068146A (en) * | 2015-07-31 | 2015-11-18 | 陕西煤业化工技术研究院有限责任公司 | Method of detecting coal mining water flowing fracture height in loess |
| CN105425311A (en) * | 2015-11-04 | 2016-03-23 | 陕西煤业化工技术研究院有限责任公司 | Method for detecting height of water guide crack in loess layer by utilizing ultraviolet light |
| CN107044289A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of water damage prevention and controls of bored grouting closure overlying strata water producing fractures main channel |
| CN107044280A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of bored grouting detection method of mining overburden absciss layer distribution characteristics |
| CN107131002A (en) * | 2017-06-22 | 2017-09-05 | 中国矿业大学 | Adopt the water-retaining method of leakage water resource recharge earth's surface unconsolidated formation in a kind of underground |
| CN110107284A (en) * | 2019-04-28 | 2019-08-09 | 扎赉诺尔煤业有限责任公司 | A kind of brill examining system and method detecting height of water flowing fractured zone by hydraulic pressure |
| CN110714754A (en) * | 2019-10-15 | 2020-01-21 | 神华神东煤炭集团有限责任公司 | Method, system and storage medium for determining height of fractured zone and height of caving zone |
| CN116291398A (en) * | 2022-09-07 | 2023-06-23 | 中煤科工开采研究院有限公司 | Comprehensive detection method for height of water-guiding fracture zone under condition of shallow foundation rock of shallow buried thick soil layer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678118A (en) * | 2011-12-09 | 2012-09-19 | 王志强 | Method for determining height of caving zone of stope |
| CN103147737A (en) * | 2013-02-22 | 2013-06-12 | 姚强岭 | Drilling detection method for disclosing law of overburden failure in ascending mining |
-
2014
- 2014-01-20 CN CN201410022317.5A patent/CN103742127B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678118A (en) * | 2011-12-09 | 2012-09-19 | 王志强 | Method for determining height of caving zone of stope |
| CN103147737A (en) * | 2013-02-22 | 2013-06-12 | 姚强岭 | Drilling detection method for disclosing law of overburden failure in ascending mining |
Non-Patent Citations (6)
| Title |
|---|
| 张玉军等: "高强度综放开采采动覆岩破坏高度及裂隙发育演化监测分析", 《岩石力学与工程学报》 * |
| 柳泉等: "厚煤层分层开采覆岩破坏探测研究", 《山东煤炭科技》 * |
| 王文学等: "松散层下覆岩裂隙采后闭合效应及重复开采覆岩破坏预测", 《煤炭学报》 * |
| 田根国: "采空区覆岩冒裂带发育高度预测综述", 《露天采矿技术》 * |
| 霍振龙: "寺河矿厚层综采工作面覆岩冒裂带发育高度实测研究", 《现代矿业》 * |
| 颜玉坤等: "利用钻孔确定采空区垮落带和导水裂隙带高度", 《甘肃地质》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405372A (en) * | 2014-09-28 | 2015-03-11 | 河南理工大学 | Method for testing vertical three zone heights of stope cover rock based on high level borehole flow |
| CN105068146A (en) * | 2015-07-31 | 2015-11-18 | 陕西煤业化工技术研究院有限责任公司 | Method of detecting coal mining water flowing fracture height in loess |
| CN105425311A (en) * | 2015-11-04 | 2016-03-23 | 陕西煤业化工技术研究院有限责任公司 | Method for detecting height of water guide crack in loess layer by utilizing ultraviolet light |
| WO2018233329A1 (en) * | 2017-06-22 | 2018-12-27 | 中国矿业大学 | Drilling and grouting detection method for distribution characteristics of mining-induced bed separation in overlying strata |
| CN107044280A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of bored grouting detection method of mining overburden absciss layer distribution characteristics |
| CN107131002A (en) * | 2017-06-22 | 2017-09-05 | 中国矿业大学 | Adopt the water-retaining method of leakage water resource recharge earth's surface unconsolidated formation in a kind of underground |
| CN107044289A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of water damage prevention and controls of bored grouting closure overlying strata water producing fractures main channel |
| CN107044289B (en) * | 2017-06-22 | 2019-09-03 | 中国矿业大学 | A kind of bored grouting blocks the water damage control method of overlying strata water producing fractures main channel |
| CN110107284A (en) * | 2019-04-28 | 2019-08-09 | 扎赉诺尔煤业有限责任公司 | A kind of brill examining system and method detecting height of water flowing fractured zone by hydraulic pressure |
| CN110107284B (en) * | 2019-04-28 | 2022-08-05 | 扎赉诺尔煤业有限责任公司 | Drilling and testing system and method for detecting height of water flowing fractured zone through water pressure |
| CN110714754A (en) * | 2019-10-15 | 2020-01-21 | 神华神东煤炭集团有限责任公司 | Method, system and storage medium for determining height of fractured zone and height of caving zone |
| CN110714754B (en) * | 2019-10-15 | 2023-03-14 | 神华神东煤炭集团有限责任公司 | Method, system and storage medium for determining height of fractured zone and height of caving zone |
| CN116291398A (en) * | 2022-09-07 | 2023-06-23 | 中煤科工开采研究院有限公司 | Comprehensive detection method for height of water-guiding fracture zone under condition of shallow foundation rock of shallow buried thick soil layer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103742127B (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103742127A (en) | Drill-hole television detection determination method for heights of overlying-strata caving zone and diversion fissure zone | |
| CN104694746B (en) | A kind of method of ion adsorption type re in_situ leaching and leaching ore deposit system thereof | |
| CN110397428B (en) | Displacement coalbed methane yield increasing method for coalbed methane jointly mined by vertical well and U-shaped butt well | |
| CN104790951B (en) | Weaken the method and device away from the high-order tight roofs of 100 ~ 350m of coal seam | |
| CN105179014B (en) | Mine water inrush disaster alarm method | |
| CN103147737A (en) | Drilling detection method for disclosing law of overburden failure in ascending mining | |
| CN107044280A (en) | A kind of bored grouting detection method of mining overburden absciss layer distribution characteristics | |
| CN110735629B (en) | Water guide fracture zone height judging method based on upward drilling speed | |
| CN107387082A (en) | A kind of method for weakening coal seam tight roof | |
| CN104975868A (en) | Top plate high-position boring large-diameter long-drill-hole gas extraction method based on directional drilling | |
| CN102852490A (en) | High gas suction and discharge process method for complex well | |
| PL237727B1 (en) | Indexes of structural differentiation of upper zones of Ordovician limestone filling and method to determine it | |
| CN105736039A (en) | Gas extraction method based on high-pressure hydraulic cave construction on bedding hole of driving working face | |
| CN110671093A (en) | Comprehensive detection method for overburden rock activity rule based on drilling shooting | |
| CN106050234A (en) | Construction technique for protecting underground water in coal mining process | |
| CN106285776A (en) | A kind of unrestrained method of roof water based on Technology of Directional Drilling | |
| CN113685132B (en) | Ground double-hole combined water inrush prevention method for overburden movement monitoring and separation layer water drainage | |
| CN105134162A (en) | U-shaped well system and drilling method thereof | |
| CN104612691B (en) | Single borehole multilateral directional butted well salt mining method | |
| CN102635389B (en) | Method for gas drainage from high-position roadway coal seam containing shielded soft rock | |
| CN104453849A (en) | Shale gas reservoir three-dimensional geological stress predication evaluation method | |
| CN105093349A (en) | Method for actually measuring growth and development rule of crack in tunnel roof | |
| CN103422813B (en) | Individual well eye multi-lateral horizontal well system for coal bed gas and boring method | |
| CN106014345A (en) | Extraction method for mining formed composite goaf coalbed methane through lower caving method | |
| CN110714754B (en) | Method, system and storage medium for determining height of fractured zone and height of caving zone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20210120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |