CN106703888B - Coal mining rock movement large space in-situ monitoring method - Google Patents
Coal mining rock movement large space in-situ monitoring method Download PDFInfo
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- CN106703888B CN106703888B CN201611159098.0A CN201611159098A CN106703888B CN 106703888 B CN106703888 B CN 106703888B CN 201611159098 A CN201611159098 A CN 201611159098A CN 106703888 B CN106703888 B CN 106703888B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
Abstract
The present invention relates to the rock movement monitoring technology before and after seam mining, more particularly to the 1 of overlying strata large space range before and after seam mining:1 in-situ monitoring method, specially coal mining rock movement large space in-situ monitoring method.It solves the problems, such as to there is no monitoring means for the movement of rock stratum within the scope of large space both at home and abroad at present.The present invention is integrated to be migrated " Trinity " well linkage from top to bottom observation of Underground pressure, borehole television observation, the integrated monitoring method such as physical prospectings means, the working face surrouding rock stress strain monitoring such as CT observations and micro seismic monitoring between hole using based on subsidence overlying strata.The present invention is innovatively melted various observation methods and is integrated, and by each monitoring means reasonably arrange, design, observe and analyze within the scope of large space, it is complementary to one another, compares and verifies so that being realized between each observation method, innovation promotion is carried out to being respectively separately monitored technology simultaneously, to realize the precisely actual measurement in situ of coal mining rock movement large space.
Description
Technical field
The present invention relates to the rock movement monitoring technology before and after seam mining, more particularly to the big sky of overlying strata before and after seam mining
Between range 1:1 in-situ monitoring method, specially coal mining rock movement large space in-situ monitoring method.
Background technology
The motion feature of rock stratum and rule are always the key problem of coal mining, rock movement and stope after coal mining
The disasters such as mine pressure, Gas Outburst, permeable, goaf ignition are all closely bound up.However, because rock movement and its residing geology ring
The factors such as border, rock stratum attribute, mining conditions are all closely related, create the complexity and diversity of rock movement so that for
The research for being inherently in the rock movement of " camera bellows " state is increasingly complex.In recent years, domestic and foreign scholars are for rock movement
A large amount of work has all been done in research, but most of is all the side for using the analog simulations such as laboratory physical analogy, numerical simulation
Method is studied, and result of study tends not to the motion state for really reflecting rock stratum, can not preferably instruct the production at scene real
It tramples；Some scholars also use the scenes such as micro seismic monitoring, borehole television, working resistance of support monitoring, laneway stress strain monitoring
Actual measurement means have carried out rock movement quantitative description.Though micro seismic monitoring can obtain rock movement and fracture spatial dimension and
Scale, but its precision is relatively low, and error is big；Though borehole television energy fine description rock stratum fracture characteristicss, limitation is big, Observable model
It is with limit；Though the monitoring energy accurate description surrouding rock stress state of working resistance of support and laneway stress strain, all passes through
Passive processing data carry out inverting and obtain the fracture form that rock stratum may occur.Above-mentioned single monitoring means mostly just in
The certain point or macrospace range of working face mining roadway or rock movement are observed, and have certain limitation, and
Within the scope of being mostly also limited to base object model for the research of stope rock stratum both at home and abroad at present, and China is thick and super high seam stores up
Amount is abundant, and by taking the exploitation of China Datong Mine Area 20m super high seams as an example, mining Practice shows the high position except base object model range
The fracture of rock stratum shows influence also more acutely for the mine pressure of working face, therefore it is necessary to rock stratum within the scope of large space
Fracture characteristicss are precisely described, this can not only obtain overlying strata fracture migration rule, more be opened for disclosing thick and super high seam
The strong mine pressure Displaying Mechanism adopted is of great significance.
So precisely detecting the continuity motion feature of rock stratum in the time, spatially, a kind of coal mining rock stratum fortune is invented
Dynamic large space original position continuous monitoring method, it is imperative to continuously monitoring of the rock movement on time, space scale to realize.But
It is that monitoring means there is no for the movement of rock stratum within the scope of large space both at home and abroad at present.
Invention content
The present invention is solved the problems, such as to there is no monitoring means for the movement of rock stratum within the scope of large space both at home and abroad at present, be provided
A kind of coal mining rock movement large space in-situ monitoring method, not only can fine description rock stratum motion feature, while be work
The generation and control for making face mine pressure provide foundation, advantageously ensure that the safe working of coal mine.
The present invention adopts the following technical scheme that realization：Coal mining rock movement large space in-situ monitoring method is
It is realized by following steps：
A. before working face mining, along advance of the face direction from earth's surface drilling TV at a certain distance vertically downward
Peephole is observed sand coated iron mold and lithology by borehole television, and part borehole television peephole core is taken to carry out rock
The Mechanics Performance Testing of layer judges working face overlying position of key stratum according to test result, equally also utilizes working face earth's surface watt
This extraction drilling, leting speeper hole and other engineering the drilling carry out borehole television observation；
B. before working face mining, one group " three is made a call at a certain distance vertically downward from earth's surface along advance of the face direction
Position one " rock movement monitoring hole, every group there are three " Trinity " rock movement monitoring holes spaced apart, in " Trinity " rock
The installation that monitoring holes carry out rock movement monitoring instrument is moved, rock movement monitoring instrument is mounted on working face overlying chief rock stratum position
Place, and correspond to move towards and be inclined to along working face at earth's surface in its installation site and arrange that ground settlement observation point is observed for the first time；
C. arbitrary to select in borehole television peephole, earth's surface firedamp taking-out discharging drilling, leting speeper hole before working face mining
The installation of CT detection instruments between taking multiple drillings to carry out hole, one of drilling are as launch hole, any other multiple drillings
Receiver hole, and detected for the first time, grasp rock crack development characteristics before working face mining；
D. with working face mining, corresponded in goaf each " Trinity " rock movement monitoring hole location bury it is mined out
Area's pressure monitoring device, goaf pressure monitoring device are equipped with wireless transmitter, and pressure data is adopted simultaneously by wireless transmission
Ten frame working resistance of support of interval are monitored in real time with working resistance of support monitoring device；
E. with working face mining, arrange monitor for stress, strain monitoring device to work at a certain distance in tunnel
Make face face surrounding rock to be monitored in real time, while preliminary scan is carried out to tunnel profile using laser scanning device, and is working
Arrange that Microseismic monitoring system records overlying strata fracture range and its intensity that releases energy in real time within the scope of the tunnel of face；
F. with working face mining, each monitoring data are recorded in real time, and set up early-warning and predicting software systems, work as holder
Software systems are alarmed when working resistance data or goaf pressure data are more than setting maximum value, at this point, checking other prisons
Measured data, if Microseismic monitoring system monitors to release energy less than 10 to rock stratum5J, CT detection instruments, " three between borehole television, hole
Position one " rock movement monitoring instrument monitors to be caving range unobvious to rock stratum simultaneously, and laser scanning finds roadway deformation rate
Less than 0.1m/d, then sound all clear, strengthening supporting measure is otherwise then taken within the scope of working face and tunnel；
G. with working face mining, each monitoring data are recorded in real time, if though early-warning and predicting software systems are not reported
It is alert, but monitoring obtains the arbitrary the two of following phenomenon and occurs, then manually starts alarm, the strengthening supporting within the scope of working face and tunnel
Measure：1. Microseismic monitoring system must arrive rock stratum and release energy more than 106J, and it is the discovery that key stratum is broken according to borehole television data
It is disconnected；2. laser scanning finds that roadway deformation rate is more than 0.3m/d-0.5m/d；3. the goaf pressure data short time occurs rapidly
Increase, and is the discovery that key stratum is broken according to borehole television data；4. CT detection instruments, " Trinity " between borehole television, hole
Rock movement monitoring instrument monitoring must arrive rock stratum, and to be caving range big；5. the appearance of force piece working resistance short time rapidly increases；⑥
The face gas drainage holes gas short time sharply increases, and air-flow is extremely unstable；
H. it uses the above method to carry out comprehensive analysis to monitoring data, until working face mining terminates, closes on subsequent work
When face is exploited, the ground settlement data, the rock that are monitored using same method, and have exploited power cut-off face to upper one simultaneously
It moves CT data between data, hole to carry out continuing to monitor, overlying strata migration is special within the scope of large space when analysis closes on the exploitation of subsequent work face
Sign.
The present invention is innovatively melted various observation methods and is integrated, and by within the scope of large space to each monitoring means into
The rational arrangement of row, design, observation and analysis so that realized between each observation method and be complementary to one another, compare and verify, while is right
It is respectively separately monitored technology and carries out innovation promotion, to realize the precisely actual measurement in situ of coal mining rock movement large space.
The method of the invention has the advantage that：1）Realize that rock movement is sagging from the well of " earth's surface-overlying strata-working face "
Histogram realizes rock movement in vertical direction, working face to continuous monitoring, the arrangement of advance of the face direction drilling and observation
Direction of propulsion（Horizontal direction）Continuous monitoring, pass through CT observations between rock movement monitoring, hole, micro seismic monitoring, laneway stress strain prison
The arrangement of survey and goaf stress monitoring realizes the continuous prison of the four-dimensional scale based on earth's surface-overlying strata-working face-time
It surveys；2）Monitoring method is more, mutually can make up and correspond between each monitoring means, is conducive to the fining description of rock movement；3）
Observation borehole engineering amount is big, and working face drill hole density is up to 120 holes/km2More than；4）Working face Other Engineering drills（Gas is taken out
Borehole, leting speeper hole etc.）Gas pumping amount, drilling water level can also react rock stratum fracture characteristicss to a certain degree, especially
The suddenly change of gas pumping amount all corresponds to rock stratum and collapses disconnected generation, while such drilling can do rock shift observation hole use, realize
One hole is multi-purpose.The monitoring method not only can finely detect the movement of rock stratum within the scope of coal mining large space, together
When the mine pressure of working face is shown and is controlled with directive function, be with a wide range of applications.
Description of the drawings
Fig. 1 is the principle schematic of the method for the invention；
Fig. 2 is the local A sectional views of Fig. 1；
Fig. 3 is the Local C sectional view of Fig. 1；
Fig. 4 is the local B sectional views of Fig. 1.
In figure：1- working faces, 2- borehole television peepholes, 3- borehole televisions, 4- " Trinity " rock movement monitorings hole, 5- rocks
Move monitoring instrument, 6- ground settlement observation points, CT detection instruments between the holes 7-, the goafs 8- pressure monitoring device, the work of 9- holders
Monitoring device of resistance, the tunnels 10-, 11- monitor for stress, 12- strain monitoring devices, 13- Microseismic monitoring systems, 14- close on
Subsequent work face.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings：
It is coal mining rock movement large space in-situ monitoring method schematic diagram of the present invention as shown in Figure 1, it is comprehensive to use base
In " Trinity " well linkage from top to bottom observation of subsidence-overlying strata migration-Underground pressure, borehole television are observed, CT is seen between hole
It surveys and integrated monitoring method, the steps such as physical prospectings means, the working face surrouding rock stress strain monitorings such as micro seismic monitoring is：
A. it before the exploitation of working face 1, is seen vertically downward every 50m drilling TVs from earth's surface along 1 direction of propulsion of working face
Gaging hole 2 is observed sand coated iron mold and lithology by borehole television 3, and borehole television peephole 2 core in part is taken to carry out rock
The Mechanics Performance Testing of layer judges working face overlying position of key stratum according to test result, equally also utilizes working face earth's surface watt
The drilling of the Other Engineerings such as this extraction drilling, leting speeper hole carries out borehole television 3 and observes；
B. before the exploitation of working face 1, one group " three are made a call to every 150m vertically downward from earth's surface along advance of the face direction
One " rock movement monitoring hole 4, every group has 3 " Trinity " rock movement monitorings drilling 4, spacing 50m, moves and supervises in " Trinity " rock
Gaging hole 4 carries out the installation of rock movement monitoring instrument 5, and rock movement monitoring instrument 5 is mounted at the position of working face overlying chief rock stratum,
And correspond to move towards and be inclined to along working face at earth's surface in its installation site and arrange that ground settlement observation point 6 is observed for the first time, it walks
It is 200m to, tendency line of observation overall length, respectively lays 11 ground settlement observation points 6, each 6 spacing of earth's surface settlement observation point is
20m；
C. before the exploitation of working face 1, in borehole television peephole 2, earth's surface firedamp taking-out discharging drilling, leting speeper hole, arbitrarily
The installation that multiple drillings carry out CT detection instruments 7 between hole is chosen, one of drilling is used as launch hole, any other multiple drillings
It for receiver hole, and is detected for the first time, grasps rock crack development characteristics before working face 1 is exploited；
D. with working face 1 exploit, corresponded in goaf buried at each 4 position of " Trinity " rock movement monitoring hole it is mined out
Area's pressure monitoring device 8, goaf pressure monitoring device 8 are equipped with wireless transmitter, and pressure data is by wireless transmission, simultaneously
Ten frame working resistance of support of interval are monitored in real time using working resistance of support monitoring device 9；
E. it is exploited with working face 1, arranges that monitor for stress 11, strain monitoring device 12 are right every 150m in tunnel 10
Working face face surrounding rock is monitored in real time, specifically includes 5 stress monitoring instruments, 5 displacement monitors, while sweeping using laser
Imaging apparatus carries out preliminary scan to 10 profile of tunnel, and arranges Microseismic monitoring system 13 to overlying strata in 10 range of roadway workface
Fracture range and its intensity that releases energy are recorded in real time；
F. it exploits, each monitoring data is recorded in real time, and set up early-warning and predicting software systems with working face 1, exploited
Monitoring that working resistance of support data or goaf pressure data are more than setting maximum value in the process, software systems are alarmed,
At this point, other monitoring data are checked, if Microseismic monitoring system 13 monitors to release energy less than 10 to rock stratum5J, borehole television 3,
CT detection instruments 7, rock movement monitoring instrument 5 monitor to be caving range unobvious to rock stratum simultaneously between hole, and laser scanning finds lane
10 rate of deformation of road is less than 0.1m/d, sounds all clear at this time, otherwise then takes strengthening supporting to arrange within the scope of working face and tunnel
It applies；
G. it exploits, each monitoring data is recorded in real time, if though early-warning and predicting software systems do not occur with working face 1
Alarm, but monitoring obtains the arbitrary the two of following phenomenon and occurs, then manually starts alarm, reinforce branch within the scope of working face and tunnel
Shield measure：1. Microseismic monitoring system 13 is obtained and is released energy to rock stratum more than 106J, and it is the discovery that key according to borehole television data
Layer fracture；2. laser scanning finds that 10 rate of deformation of tunnel is more than 0.3m/d-0.5m/d；3. the goaf pressure data short time goes out
Now rapidly increase, and is the discovery that key stratum is broken according to borehole television data；4. CT detection instruments 7, rock between borehole television 3, hole
Shifting monitoring instrument 5 monitors to be caving range to rock stratum big；5. the appearance of force piece working resistance short time rapidly increases；6. work
Making the face gas pumping hole gas short time sharply increases, and air-flow is extremely unstable；
H. it uses the above method to carry out comprehensive analysis to monitoring data, until the exploitation of working face 1 terminates, closes on subsequent work
When face 14 is exploited, the ground settlement number that is monitored using same method, and has exploited power cut-off face 1 to upper one simultaneously
CT data between data, hole are moved according to, rock to carry out continuing to monitor, analysis closes on when subsequent work face 14 is exploited overlying strata within the scope of large space
Migration characteristics, and the mine pressure for mutually coping with according to monitoring result working face shows and control effectively.
Meanwhile by live large space in-situ bioremediation find, overlying key rock stratum fracture with working face come press, goaf press
Power is in one-to-one relationship, and the fracture of overlying key rock stratum causes Face Ground Pressure Behavior degree to increase, when overlying main key stratum
After fracture, generally all along with the generation of surface subsidence, uprushing for ground settlement data is generally broken also one by one with main key stratum
It is corresponding；Borehole television monitors to obtain working face crack develops range about 30m in advance, after 20m super high seams are exploited, overlying strata crack
Development height is up to 300m, and CT also detects overlying strata cranny development degree after working face mining that obtains and greatly increases between hole, but not
It is different with development degree at buried depth, it is corresponded with borehole television data；Micro seismic monitoring, working face surrouding rock stress strain monitoring obtain
To the monitoring result in space, time scale also with above-mentioned monitoring result have good correspondence；By being taken out to gas
The observation of discharge hole, leting speeper hole shows gas pumping amount, the variation of drilling water level can also reflect the fracture characteristicss of rock stratum.Meanwhile
The Multi-working-surface continuous monitoring of large scale in the horizontal direction shows working face and closes on goaf and entity coal different structure pair
It is influenced in this exploitation working face overlying strata fracture characteristicss also different.By using above-mentioned large space in-situ bioremediation method, for analysis
Rock is moved in space, the fracture characteristicss of time scale, mine pressure mechanism of action with important meaning within the scope of large space after seam mining
Justice.
Claims (3)
1. a kind of coal mining rock movement large space in-situ monitoring method, it is characterised in that：It is to be realized by following steps：
A. in working face（1）Before exploitation, along working face（1）Drilling is electric at a certain distance vertically downward from earth's surface for direction of propulsion
Depending on peephole（2）, pass through borehole television（3）Sand coated iron mold and lithology are observed, and take part borehole television peephole（2）
Core carries out the Mechanics Performance Testing of rock stratum, judges working face overlying position of key stratum according to test result, equally also utilizes work
Make face earth's surface firedamp taking-out discharging drilling, leting speeper hole carries out borehole television（3）Observation；
B. in working face（1）Before exploitation, one group " three is made a call at a certain distance vertically downward from earth's surface along advance of the face direction
Position one " rock movement monitoring hole（4）, every group there are three " Trinity " rock movement monitoring holes spaced apart（4）, at " three
One " rock movement monitoring hole（4）Carry out rock movement monitoring instrument（5）Installation, rock movement monitoring instrument（5）Mounted on working face overlying master
It wants at crucial rock stratum position, and is corresponded in its installation site and move towards and be inclined to arrangement ground settlement observation point at earth's surface along working face
（6）It is observed for the first time；
C. in working face（1）Before exploitation, in borehole television peephole（2）, earth's surface firedamp taking-out discharging drilling, in leting speeper hole, arbitrarily
It chooses multiple drillings and carries out CT detection instruments between hole（7）Installation, one of drilling is used as launch hole, any other multiple brills
Hole is receiver hole, and is detected for the first time, and working face is grasped（1）Rock crack development characteristics before exploitation；
D. with working face（1）Exploitation, corresponds to each " Trinity " rock movement monitoring hole in goaf（4）It buries and adopts at position
Dead zone pressure monitoring device（8）, goaf pressure monitoring device（8）Wireless transmitter is installed, pressure data is by wirelessly passing
It is defeated, while using working resistance of support monitoring device（9）Ten frame working resistance of support of interval are monitored in real time；
E. with working face（1）Exploitation, in tunnel（10）In arrange monitor for stress at a certain distance（11）, strain monitoring dress
It sets（12）Working face face surrounding rock is monitored in real time, while using laser scanning device to tunnel（10）Profile carries out first
Scanning, and in roadway workface（10）Microseismic monitoring system is arranged in range（13）To overlying strata fracture range and its release energy strong
Degree is recorded in real time；
F. with working face（1）Exploitation, in real time records each monitoring data, and set up early-warning and predicting software systems, works as holder
Software systems are alarmed when working resistance data or goaf pressure data are more than setting maximum value, at this point, checking other prisons
Measured data, if Microseismic monitoring system（13）It monitors to release energy less than 10 to rock stratum5J, borehole television（3）, CT is detected between hole
Instrument（7）, rock movement monitoring instrument（5）It monitors to be caving range unobvious to rock stratum simultaneously, and laser scanning finds tunnel（10）
Rate of deformation is less than 0.1m/d, then sounds all clear, strengthening supporting measure is otherwise then taken within the scope of working face and tunnel；
G. with working face（1）Exploitation, in real time records each monitoring data, if though early-warning and predicting software systems are not reported
It is alert, but monitoring obtains the arbitrary the two of following phenomenon and occurs, then manually starts alarm, the strengthening supporting within the scope of working face and tunnel
Measure：1. Microseismic monitoring system（13）It obtains and releases energy to rock stratum more than 106J, and it is the discovery that key according to borehole television data
Layer fracture；2. laser scanning finds tunnel（10）Rate of deformation is more than 0.3m/d-0.5m/d；3. the goaf pressure data short time
Appearance rapidly increases, and is the discovery that key stratum is broken according to borehole television data；4. borehole television（3）, CT detection instruments between hole
（7）, rock movement monitoring instrument（5）It monitors to be caving range to rock stratum big；5. the force piece working resistance short time occurs rapidly
Increase；6. the face gas drainage holes gas short time sharply increases, air-flow is extremely unstable；
H. the above method is used to carry out comprehensive analysis to monitoring data, until working face（1）Exploitation terminates, and closes on subsequent work face
（14）It when exploitation, is monitored using same method, and has exploited power cut-off face to upper one simultaneously（1）Ground settlement number
CT data between data, hole are moved according to, rock to carry out continuing to monitor, analysis closes on subsequent work face（14）It is covered within the scope of large space when exploitation
Rock migration characteristics.
2. coal mining rock movement large space in-situ monitoring method according to claim 1, it is characterised in that：Step a
Middle borehole television peephole（2）Spacing be 50m；Every group of " Trinity " rock movement monitoring hole in step b（4）The distance between be
150m, " Trinity " the rock movement monitoring hole in every group（4）Spacing be 50m, move towards, be inclined to and each lay 11 ground settlements and see
Measuring point（6）, each earth's surface settlement observation point（6）Spacing is 20m；Monitor for stress in step e（11）Between, strain monitoring device
（12）Between between be divided into 150m.
3. coal mining rock movement large space in-situ monitoring method according to claim 2, it is characterised in that：Step e
In arrange five monitor for stress altogether（11）, five strain monitoring devices（12）.
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| CN201611159098.0A CN106703888B (en) | 2016-12-15 | 2016-12-15 | Coal mining rock movement large space in-situ monitoring method |
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| CN201611159098.0A CN106703888B (en) | 2016-12-15 | 2016-12-15 | Coal mining rock movement large space in-situ monitoring method |
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| CN115453090B (en) * | 2022-09-14 | 2023-10-27 | 煤炭科学研究总院有限公司 | Method for measuring crushing expansion coefficient of roof of coal face |
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