CN104502957A - Method for quickly fixing micro-seismic sensor underground - Google Patents
Method for quickly fixing micro-seismic sensor underground Download PDFInfo
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- CN104502957A CN104502957A CN201410786585.4A CN201410786585A CN104502957A CN 104502957 A CN104502957 A CN 104502957A CN 201410786585 A CN201410786585 A CN 201410786585A CN 104502957 A CN104502957 A CN 104502957A
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Abstract
The invention provides a method for quickly fixing a microseismic sensor underground. The fixing method is based on the anchor rod (11) provided by the support mode of the anchor rod (11) of the underground coal roadway driving working face as a carrier, the traditional embedded installation mode is changed, and the sensor and the anchor rod (11) are fixedly connected into a whole through the underground quick fixed micro-seismic device. The device comprises an outer cover and a connector, wherein the outer cover consists of a bottom plate (2), a cover body (3), an external sound wave insulating material (4) and a closed hole (5); the connector consists of a protruding shaft (7), a baffle plate (8) and a fixing bolt (9). The method solves a series of problems of complex installation procedure, long time consumption, difficult recovery and the like existing in the traditional installation mode of the existing microseismic sensor. The sensor is quickly mounted and dismounted, and in addition, the cover body provided by the device can provide fixing and protecting effects for the sensor and can also play roles in isolating and eliminating noise.
Description
Technical field
The present invention relates to a kind of down-hole and fast fix microseismic sensors method, relate to a kind of microseismic sensors anchor rod type installation method.
Background technology
China is global maximum coal producer, and its consumption of coal is also high to occupy first place in the world.2000, in China's total output of primary energy, raw coal accounted for 66.6%.Since 2002, country adjusts energy strategy, is summarized as and " ensures safety, optimize structure, raise the efficiency, protection of the environment, extend and open; Energy-conservation limited, structure is polynary, environmental friendliness, and market promotes ", the diversity of Special attention will be given to energy development and the many-side such as safety in production and environmental protection, this period coal mining got back to again the leading position of the overall energy, its economic status is also recovered day by day.Within 2004, the National Development and Reform Commission is in conjunction with China's energy general layout present situation, again formulated new forms of energy strategy " based on coal, centered by electric power; oil gas and new forms of energy all-round developing ", along with the guiding of policy, coal production capacity improves further, and the production formation of the energy shared by raw coal and the structure of consumer demand have larger ascendant trend.As the main body energy and the essential industry raw material of China, the proportion of coal in the disposable energy consumption structure of China, more than 60%, expects the year two thousand fifty this ratio and will maintain more than 50%.Therefore, within very long one period, coal will occupy the leading position of energy consumption structure.At present, China more than 95% mine is pit mining, and because its coal mining geological condition is complicated, the disaster factors such as top board, gas, water, fire, coal dust are many, and it causes calamity complicated mechanism, makes the control of Coal Mine Disasters arduous.With Dissertation of Development of Coal Industry is increasingly severe mine disaster accident conditions.2013, China's coal-mine fatality rate per million tons was 0.293, drops to less than 0.3 first, falls 21.7% on a year-on-year basis, but these data are several times even tens times (the main coal producer such as the U.S., Poland is lower than 0.1 people/1,000,000 ton) of developed country.Colliery is the industry that in operating mode enterprise, death tolls is maximum, and its accident pattern mainly comprises gas, top board, water damage, transports, blows out.Learn with the coal mining accident data analysis that Guizhou occurs for nearly 10 years: Coal in Guizhou top board, gas and water damage are the primary categories that accident occurs.Wherein, roof accident rise number and death toll be in first of all kinds of accident; The death toll that gas accident causes is only second to roof accident, but roof accident plays number is that gas accident plays several 4.7 times; It is maximum that water damage and gas accident list play death tolls, and be respectively 4.9 people/rise and 6.1 people/rise, total number that rises of gas accident plays number apparently higher than the total of water damage; In gas accident, great, comparatively major break down mostly be coal and gas prominent accident.Therefore, gas, water damage, roof accident are the major accident classifications causing the dead group's wound of group.
The front three that above-mentioned coal mining accident harmfulness is maximum: i.e. top board, gas, water, all can carry out look-ahead and control.Theoretical research shows, it is no matter the dynamic disaster of non-coal mine, or the problems such as the roof fall of mine coal rock mass, permeable and coal containing methane gas rock mass are outstanding, be nearly all former stress field bring out under recovery activity disturbance the germinating of coal and rock micro rupture, development, the rupture process unstability such as through result.And before most of dynamic disaster occurs, one or more corresponding coal and rock micro rupture omens all can be had to occur.Therefore, according to energy level variations rule before and after the fracturing features of coal and rock under external force load and coal and gas prominent, by the scientific algorithm means of advanced person, the precursor information that effective monitoring coal and rock is broken, to mine power disaster, particularly the prediction of coal and gas prominent dynamic phenomenon has very important meaning.
Microseismic monitoring system (Micro-seismic Monitoring System, MMS), result from early seventies in last century, reach its maturity along with the development of infotech, computing technique and the raising of computer level, it mainly utilizes acoustics, seismology and geophysics's principle and the powerful computing function of computing machine to the determination of the accurate location and rank size that realize microseismic event.This system is successfully applied to multiple fields such as mining, civil engineering work, tunnel, petroleum natural gas exploration and flood control dam.
The engineering media such as coal and rock, in the process of deformation failure, gather, store, release energy, and cause the generation in crack, expansion, destruction, create the vibrations shaking or cause other media.Micro seismic monitoring equipment and technology by monitoring, analyze shock event, can predicting, the destructiveness of the engineering medium such as early warning coal and rock, providing support for preventing and treating disaster.
The seismic monitoring that the exploitation of gold deposit in the Johannesburg, South Africa area that the application of On Microseismic Monitoring Technique in underground works starts from the beginning of last century the earliest brings out.The early monitoring of South Africa to microearthquake adopts conventional seismic monitoring instrument, and in South Africa, each main gold mine launches in the large-scale mine microquake research sixties, and thereupon since 1970 ~ 1980 years each gold mining mine successively establish the mine microquake monitoring station.To the middle of last century, all successively carry out Mine Earthquakes research in large states of mining such as Poland, the U.S., USSR (Union of Soviet Socialist Republics), Canada.
The micro seismic monitoring research work of domestic colliery originates in the 1980s, introduce Polish SYLOK8 passage Microseismic monitoring system at Mentougou mine by units such as former Ministry of Coal Industry and State Seismological Bureaus to test, this Ye Shi China carries out MULTI-CHANNEL MICROSEISMIC MONITORING technical research in mine first.In recent years, China's micro seismic monitoring is in mine, particularly metal mine application is comparatively extensive, its object is mainly used for mine pressure monitoring and Safety Control of Roof, also obtain the experience of comparatively maturation, the import monitoring system that it adopts mainly contains ISS system, Polish ARAMIS M/E and the SOS system and the Canadian ESG Microseismic monitoring system becoming to produce of producing that South Africa (existing Australia) produces.Along with the increase day by day of China's mining degree of depth, the rock burst hazard brought out under high stress seriously will restrict mining production, and On Microseismic Monitoring Technique is applied very active at home.Domestic from the eighties, domestic DYF-1 the earliest, the DYF-2 type portable intelligent earth signal analyser of Changsha Mine Inst's independent research and SDL-1, SDL-12 type multiple channel acousto detection monitoring system.By the end of so far, ESG Microseismic monitoring system at home market, mine application is comparatively extensive, adds up according to investigations, domestic total ESG equipment 19 overlaps, rig-site utilization equipment 15 overlaps, and laboratory study 4 is overlapped, wherein with incense burner mountain, xiushui tungsten ore monitoring ore pillar residual fief pressure; Yima Mining Group Co., Ltd eternal lasting colliery, leap mine monitoring rock burst; Science of safety of mining research institute of Guizhou Province is used for coal and gas prominent arrears alert theory and rig-site utilization is monitored; Huai Nanxin Zhuan Zi, keep watch hilllock mine monitoring rock burst and fault tectonic etc. are for representative.ISS equipment has 11 covers (comprising Intentionality installation etc.) at home, normal operation have 3 covers, it is mainly used in the rock-burst monitoring early warning as Dongguashan ore deposit, Yunnan Huize Pb-Zn, water power institute of Sichuan University is for monitoring the rock stability of rock slope or tunnel, and Institutes Of Technology Of He'nan is used for coal and gas prominent mechanism theory and teaching research.In addition, ARAMIS M/E and the SOS Microseismic monitoring system of Poland also have more application in the colliery of China, if the SOS Microseismic monitoring system of flat coal share 11 ore deposit introduction is for determining that the vibrations type of vibrations occurs mine, thus judge impulsion pressure forces occurring source, Rock Burst hazard level is evaluated.
At present, microseism technology is mainly used in rock stability monitoring, then be mainly used in the monitoring of rock burst within coal mines, and obtain good effect, and in the application of prediction coal and gas prominent, only carry out overtesting in Lin Hua colliery, Guizhou and the loyal colliery of justice, Huainan Mining Group minority mine, be still in exploration and conceptual phase at present.The generation of coal and gas prominent and development are with numerous events such as this coal body micro rupture, Coal body Instability, mash gas dynamic phenomenons, these events often produce microseismic signals in various degree, On Microseismic Monitoring Technique can carry out Real-Time Monitoring and location to these small vibrations, by monitoring change procedures such as coal and rock crack, STRESS VARIATION and Gas explosion burns the accurate identification of microseismic signals, thus early warning is carried out to coal and gas prominent.Therefore, microseism technology is the important directions of current coal and gas prominent early warning, and is the long-range direction of outburst prediction and comprehensive outburst control technical development from now on.
In order to better monitor effective microseismic signals, need in conjunction with actual field situation, the sensor sensor setting angle of one of microseismic system major equipment and orientation are constantly adjusted, in the process, the convenient and economic and practical of downhole operations must be considered.At present, the installation of microseismic sensors adopts flush type mostly, causes complex installation process and wastes a large amount of human and material resources, and reclaims difficulty, causes huge economic loss.In addition, the signal comparatively horn of plenty that traditional mounting means sensor gathers, well can not completely cut off the noise effect of other flow chart outside.
In sum, the method and the device thereof that propose a kind of quick fixing microseismic sensors are very important.
Summary of the invention
For prior art Problems existing; the object of the invention is to invent a kind of method that microseismic sensors is fast fixed in down-hole; realize sensor to pacify loading and unloading easily and efficiently and get; fixing, protective effect is played to sensor simultaneously, avoid it to be subject to the injury of external object, physics filter action is served to undesired signals such as external noises; the man-hour of sensor handling can be reduced; eliminate the quantities of drilling, decrease expending of manpower and materials, avoid in sensor cargo handling process and cause damage.
Technical scheme provided by the invention is:
Provide a kind of down-hole and fast fix microseismic sensors method.
The present invention fast fixes a kind of down-hole the method for microseismic sensors, it is characterized in that: the device fast being fixed microseismic sensors by a down-hole, be called for short device, by microseismic sensors and the anchor pole compact siro spinning technology be embedded in rock mass, microseismic sensors is fixed on set monitoring location, rock mass microseismic signals, by anchor pole and device, is passed to microseismic sensors microseismic sensors and is networked by cable and external computer system by signal.
The device that microseismic sensors is fast fixed in a kind of down-hole of indication is made up of outer cover and connector two kinds of parts, and outer cover is made up of base plate, cover body, external acoustic waves insulating material and lipostomous; Connector forms by giving prominence to axle, baffle plate and gim peg; Outstanding axle, gim peg are welded on baffle plate, outstanding axle and microseismic sensors front end internal thread compact siro spinning technology, gim peg and the anchor pole close-coupled be embedded in rock mass.
Outer cover is divided into symmetrical two parts, and symmetrical two parts are by four bolts by lipostomous tight closure, and microseismic sensors and connector are tightly wrapped up by closed outer cover.
Outer cover base plate leaves hole, and the cable of microseismic sensors rear end is stretched out by the aperture of base plate.
Connector gim peg size will match with selected anchor pole, can with anchor pole close-coupled, ensure that the microseismic signals that coal and rock is broken or other is to be detected can be transferred in microseismic sensors by anchor pole, if the change in size of anchor pole, the size of gim peg also wants respective change.
Microseismic sensors anchor rod type installation and removal concrete grammar is as follows:
Step one, according to sensor installation position and the angle of design, chooses the anchor pole satisfied condition at Driving Face in Coal Tunnel;
Step 2, after determining anchor pole, by the gim peg of connector and anchor pole close-coupled;
Step 3, gives prominence to axle by corresponding for sensor internal thread connector, and rotates to steady state (SS) by its ridge orientation;
Step 4, is received wherein by sensor and giving prominence to of connector bottom axle, baffle plate, gim peg with cover body, is combined firmly by bolt at lipostomous place with cover body.
Step 5, to be monitored complete, the bolt in lipostomous is screwed off, unloads lower cover, sensor, outstanding axle, gim peg are rotated counterclockwise along sensor internal thread, complete the recovery of sensor and stationary installation, can repeatedly use.
The present invention has features:
A. adopt contact to fix microseismic sensors mounting means, utilize anchor pole that down-hole Driving Face in Coal Tunnel bolt supporting provides as carrier, by this device, microseismic sensors is fixed on set monitoring location;
B. this fixed form has been abandoned tradition and has been imbedded all drawbacks of installation, does not namely need to divert rig, does not also need to creep into coal and rock, also reduce because of a series of supporting operations such as sealing of hole, down-hole water power supplies simultaneously;
C. this fixing means is simple, convenient, and a people can complete all installation procedures, while increasing work efficiency, also reduces the input of human and material resources, thus promotes the economic benefit of mine;
D. this mounting means, microseismic sensors does not need to imbed coal and rock, anchor pole by going deep into coal and rock carries out microseismic signals transmission and collection, in addition, also avoid and be embedded in lane side or the driving microseismic sensors in front and comprehensive pick equipment and collide caused spark, and then effectively stop the generation of gas explosion accident, greatly improve the production safety of mine;
E. this fixing microseismic sensors method, is be connected with anchor pole by the quick fixation of sensor device in down-hole, can conveniently carries out removing and reclaiming, can repeatedly reuse; Secondly, because microseismic sensors is exact instrument, expensive, the method has also evaded microseismic sensors because of irremediable injury impact that other mounting means is not recyclable or cause in removal process.
F. beneficial effect of the present invention can be pacified loading and unloading easily and efficiently in microseismic sensors and got, and has saved the quantities of drilling, and decreases the man-hour of sensor handling, decreases expending of manpower and materials, avoid in microseismic sensors cargo handling process and cause damage.Outer cover serves support, fixes, protects the effect of sensor simultaneously, and avoid it to be subject to the injury of external object, the external acoustic waves barrier material on cover body wall serves physics filter action to noise signals such as personnel speak.
Accompanying drawing explanation
Fig. 1 fast fixes microseismic sensors device schematic diagram;
Fig. 2 is connector schematic diagram;
Fig. 3 is outer cover schematic diagram.
Label in accompanying drawing is respectively: 1, connect the cable of microseismic sensors, and 2, base plate, 3, cover body, 4, external acoustic waves barrier material, 5, lipostomous, 6, microseismic sensors, be called for short sensor, 7, outstanding axle, 8, baffle plate, 9, gim peg, 10, bottom plate hole, be called for short hole, 11, anchor pole, 12, coal (rock) body.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated: the method for microseismic sensors is fast fixed in a kind of down-hole, it is characterized in that: the device fast being fixed microseismic sensors by a down-hole, be called for short device, by microseismic sensors 6 and anchor pole 11 compact siro spinning technology be embedded in rock mass, microseismic sensors 6 is fixed on set monitoring location, rock mass microseismic signals is by anchor pole 11 and device, pass to microseismic sensors 6, signal is networked by cable 1 and external computer system by microseismic sensors 6.
The device that microseismic sensors is fast fixed in a kind of down-hole is made up of outer cover and connector two kinds of parts, and outer cover is made up of base plate 2, cover body 3, external acoustic waves insulating material 4 and lipostomous 5; Connector forms by giving prominence to axle 7, baffle plate 8 and gim peg 9; Outstanding axle 7, gim peg 9 are welded on baffle plate 8, outstanding axle 7 and microseismic sensors 6 front end internal thread compact siro spinning technology, gim peg 9 and anchor pole 11 close-coupled be embedded in rock mass 12.
Outer cover is divided into symmetrical two parts, and symmetrical two parts are by four bolts by lipostomous 5 tight closure, and sensor 6 and connector tightly wrap up by closed outer cover.
Outer cover base plate 2 leaves hole 10, and the cable 1 of sensor rear end is stretched out by the aperture 10 of base plate 2.
Connector gim peg 9 size will match with selected anchor pole 11, can with anchor pole 11 close-coupled, ensure that the microseismic signals that coal and rock is broken or other is to be detected can be transferred on sensor 6 by anchor pole 11, if the change in size of anchor pole 11, the size of gim peg 9 also wants respective change.
Microseismic sensors anchor rod type installation and removal concrete grammar is as follows:
Step one, according to sensor installation position and the angle of design, chooses the anchor pole 10 satisfied condition at Driving Face in Coal Tunnel;
Step 2, after determining anchor pole 10, by gim peg 9 and anchor pole 10 close-coupled of connector;
Step 3, gives prominence to axle 7 by corresponding for sensor 6 internal thread connector, and rotates to steady state (SS) by its ridge orientation;
Step 4, is received wherein by sensor 6 and giving prominence to of connector bottom axle 7, baffle plate 8, gim peg 9 with cover body 3, is combined firmly by connecting link at lipostomous 5 place with cover body 3.
Step 5, to be monitored complete, the bolt in lipostomous 5 is screwed off, unloads lower cover 3, sensor 6, outstanding axle 7, gim peg 9 are rotated counterclockwise along sensor 6 internal thread, complete the recovery of sensor and stationary installation, can repeatedly use.
The above is only the preferred embodiment of the present invention; it should be pointed out that the those of ordinary skill for this method field, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered within the scope of protection of the present invention.
Claims (6)
1. the method for microseismic sensors is fast fixed in a down-hole, it is characterized in that: the device fast being fixed microseismic sensors by a down-hole, be called for short device, by microseismic sensors (6) and anchor pole (11) compact siro spinning technology be embedded in rock mass, microseismic sensors (6) is fixed on set monitoring location, rock mass microseismic signals, by anchor pole (11) and device, passes to microseismic sensors (6), and signal is networked by cable (1) and external computer system by microseismic sensors (6).
2. the device of microseismic sensors is fast fixed in a kind of down-hole as claimed in claim 1, it is characterized in that: this device is made up of outer cover and connector two parts, outer cover is made up of base plate (2), cover body (3), external acoustic waves insulating material (4) and lipostomous (5); Connector forms by giving prominence to axle (7), baffle plate (8) and gim peg (9); Outstanding axle (7), gim peg (9) are welded on baffle plate (8), outstanding axle (7) and microseismic sensors (6) front end internal thread compact siro spinning technology, gim peg (9) and anchor pole (11) close-coupled be embedded in rock mass (12).
3. the device of microseismic sensors is fast fixed in a kind of down-hole according to claim 2, it is characterized in that: outer cover is divided into symmetrical two parts, symmetrical two parts are by four bolts by lipostomous (5) tight closure, and microseismic sensors (6) and connector are tightly wrapped up by closed outer cover.
4. the device of microseismic sensors is fast fixed in a kind of down-hole according to claim 2, it is characterized in that: outer cover base plate (2) leaves hole (10), and the cable (1) of microseismic sensors rear end is stretched out by the aperture (10) of base plate (2).
5. the device of microseismic sensors is fast fixed in a kind of down-hole according to claim 2, it is characterized in that: connector gim peg (9) size will match with selected anchor pole (11), can with anchor pole (11) close-coupled, ensure that the microseismic signals that coal and rock is broken or other is to be detected can be transferred in microseismic sensors (6) by anchor pole (11), if the change in size of anchor pole (11), the size of gim peg (9) also wants respective change.
6. the method for microseismic sensors is fast fixed in a kind of down-hole according to claim 1, it is characterized in that
Microseismic sensors anchor rod type installation and removal concrete grammar is as follows:
Step one, according to sensor installation position and the angle of design, chooses the anchor pole 10 satisfied condition at Driving Face in Coal Tunnel;
Step 2, after determining anchor pole 10, by gim peg 9 and anchor pole 10 close-coupled of connector;
Step 3, gives prominence to axle 7 by corresponding for sensor 6 internal thread connector, and rotates to steady state (SS) by its ridge orientation;
Step 4, is received wherein by sensor 6 and giving prominence to of connector bottom axle 7, baffle plate 8, gim peg 9 with cover body 3, is combined firmly by bolt at lipostomous 5 place with cover body 3;
Step 5, to be monitored complete, the bolt in lipostomous 5 is screwed off, unloads lower cover 3, sensor 6, outstanding axle 7, gim peg 9 are rotated counterclockwise along sensor 6 internal thread, complete the recovery of sensor and stationary installation, can repeatedly use.
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| CN201410786585.4A CN104502957A (en) | 2014-12-18 | 2014-12-18 | Method for quickly fixing micro-seismic sensor underground |
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| CN104834002A (en) * | 2015-05-07 | 2015-08-12 | 贵州省矿山安全科学研究院 | Device capable of stretching and embedding for fixing and recovering microseismic sensor and use method thereof |
| CN105626150A (en) * | 2016-02-04 | 2016-06-01 | 山东大学 | Micro-seismic monitoring-based gob-side excavation roadway dynamic monitoring and stability evaluating method |
| CN105698853A (en) * | 2016-01-28 | 2016-06-22 | 山东大学 | A detection method for a surrounding rock bolt-grouting support effect in a working surface extraction period |
| CN107991706A (en) * | 2017-11-24 | 2018-05-04 | 华北科技学院 | Combine noise-reduction method based on wavelet packet multiple thresholds and the coal seam hydraulic fracture microseismic signals for improving empirical mode decomposition |
| CN110469354A (en) * | 2019-08-30 | 2019-11-19 | 东北大学 | A kind of anti-pulling anchor pole for country rock micro seismic monitoring |
| CN110609318A (en) * | 2019-09-19 | 2019-12-24 | 东北大学 | Method for pre-tightening and installing micro-seismic sensor on underground coal mine anchor rod |
| CN110671139A (en) * | 2019-09-04 | 2020-01-10 | 陕西省引汉济渭工程建设有限公司 | Mounting device of micro-seismic monitoring sensor based on anchor rod and using method thereof |
| CN111946999A (en) * | 2020-08-25 | 2020-11-17 | 华亭煤业集团有限责任公司 | Protection and connection device for micro-seismic pick-up sensor |
| CN112925014A (en) * | 2021-01-28 | 2021-06-08 | 吉首大学 | Microseismic monitoring sensor assembly based on high-position installation and removal method thereof |
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| CN104834002A (en) * | 2015-05-07 | 2015-08-12 | 贵州省矿山安全科学研究院 | Device capable of stretching and embedding for fixing and recovering microseismic sensor and use method thereof |
| CN104834002B (en) * | 2015-05-07 | 2017-09-08 | 贵州省矿山安全科学研究院 | Device capable of stretching and embedding for fixing and recovering microseismic sensor and use method thereof |
| CN105698853A (en) * | 2016-01-28 | 2016-06-22 | 山东大学 | A detection method for a surrounding rock bolt-grouting support effect in a working surface extraction period |
| CN105698853B (en) * | 2016-01-28 | 2017-12-15 | 山东大学 | The detection method of country rock Effect of Bolt-grouting Support during a kind of working face extraction |
| CN105626150A (en) * | 2016-02-04 | 2016-06-01 | 山东大学 | Micro-seismic monitoring-based gob-side excavation roadway dynamic monitoring and stability evaluating method |
| CN107991706A (en) * | 2017-11-24 | 2018-05-04 | 华北科技学院 | Combine noise-reduction method based on wavelet packet multiple thresholds and the coal seam hydraulic fracture microseismic signals for improving empirical mode decomposition |
| CN110469354A (en) * | 2019-08-30 | 2019-11-19 | 东北大学 | A kind of anti-pulling anchor pole for country rock micro seismic monitoring |
| CN110671139A (en) * | 2019-09-04 | 2020-01-10 | 陕西省引汉济渭工程建设有限公司 | Mounting device of micro-seismic monitoring sensor based on anchor rod and using method thereof |
| CN110609318A (en) * | 2019-09-19 | 2019-12-24 | 东北大学 | Method for pre-tightening and installing micro-seismic sensor on underground coal mine anchor rod |
| CN110609318B (en) * | 2019-09-19 | 2021-03-26 | 东北大学 | Method for pre-tightening and installing micro-seismic sensor on underground coal mine anchor rod |
| CN111946999A (en) * | 2020-08-25 | 2020-11-17 | 华亭煤业集团有限责任公司 | Protection and connection device for micro-seismic pick-up sensor |
| CN112925014A (en) * | 2021-01-28 | 2021-06-08 | 吉首大学 | Microseismic monitoring sensor assembly based on high-position installation and removal method thereof |
| CN112925014B (en) * | 2021-01-28 | 2021-12-24 | 吉首大学 | Microseismic monitoring sensor assembly based on high-position installation and removal method thereof |
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