CN101245701A - Down-hole guiding height viewer and its observation method - Google Patents

Down-hole guiding height viewer and its observation method Download PDF

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Publication number
CN101245701A
CN101245701A CNA2007100996794A CN200710099679A CN101245701A CN 101245701 A CN101245701 A CN 101245701A CN A2007100996794 A CNA2007100996794 A CN A2007100996794A CN 200710099679 A CN200710099679 A CN 200710099679A CN 101245701 A CN101245701 A CN 101245701A
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CN
China
Prior art keywords
water
pressure
blockoff
water injection
injecting pipeline
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Application number
CNA2007100996794A
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Chinese (zh)
Inventor
高延法
Original Assignee
中国矿业大学(北京)
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Application filed by 中国矿业大学(北京) filed Critical 中国矿业大学(北京)
Priority to CNA2007100996794A priority Critical patent/CN101245701A/en
Publication of CN101245701A publication Critical patent/CN101245701A/en

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Abstract

The invention discloses an underground high-conducting visualizer and an observation method thereof. The invention includes a plurality of plugging devices that are connected in series; a water injection pipeline between two neighboring plugging devices is provided with a water injection opening; one end of the water injection pipeline is connected with a water injection control platform; the plugging pipelines are mutually communicated by external connecting pipelines and are connected with expansion pipelines. When in use, firstly bores are drilled in the cover rocks needed observing; then the plugging devices connected in series are pushed into the preset position of the bores; gas is pumped into the expansion pipeline and then one section of the bores is plugged into a plurality of sections; water is injected into the water injection pipelines and the water injection opening on the water injection pipeline between the two neighboring plugging devices are opened in sequence; water is injected into the terrane that the section of bores lies in; finally the cranny growth situation inside the cover rocks is analyzed according to the water injection seepage discharge of each section of terrane. The underground high-conducting visualizer has simple structure, is convenient for use, can realize simultaneous plugging, water injection by section and multi-section seepage detection, improve the observing efficiency and has highly reliable detection result.

Description

Down-hole guiding height viewer and observation procedure thereof
Technical field
The present invention relates to a kind of mining engineering and rock engineering test technology, relate in particular to the device and method that a kind of down-hole stope overlying strata are led high observation.
Background technology
The top board overlying strata will be subjected to corresponding destruction behind the seam mining, and this destruction influences especially severe for what coal mining under water bodies or artesian water were mined up and down, if because the fissure zone of top board overlying strata is when feeding through to the water source, the colliery will take place water body burst into.The height of water flowing fractured zone can calculate according to theoretical formula, but because the error of asking for unusual complexity and design formulas of formation parameters, the height of water flowing fractured zone of the derivation of equation has very mistake.Therefore, the field observation of water flowing fractured zone is a kind of method the most reliably under the coal mine, can verify the correctness that formula calculates simultaneously.
Traditional method is a surface drilling consumption of rinsing liquid observation method, promptly drills to the goaf from ground, judges the height of water flowing fractured zone according to the situation of change of boring cyclic flusher liquid consumption in the drilling process.This methods engineering amount is big, and complex process, the accuracy of observed result and reliability are not high yet, and affected by environment especially serious, when there is water body on the face of land, and the very difficulty of hole observation of in water body, drilling.
Existing down-hole is faced upward inclined borehole both-end water blockoff device and is led high observation patented technology, it be in the goaf around the appropriate location, beat to the stope overlying rock and to face upward inclined borehole and penetrate water flowing fractured zone, use both-end water blockoff device, plugging separating goes out one section rock stratum in boring, realization is surveyed rock stratum, stope overlying strata each layer position subsection water injection, observes its water guide performance, finally finds out the water flowing fractured zone upper limit.But because it can only be separated out one section rock stratum at every turn, observe water filling wastage (water injection rate) then, all to pass through both-end water blockoff device at every turn, rise expand, water filling pressure regulation and test a complete course of work; Water injection pressure and capsule play swelling pressure power needs control manually; And play the expand tube road in the water blockoff device and adopt inner connection mode, the apparatus structure complexity, the observation operating efficiency is lower.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, easy to use, down-hole guiding height viewer and observation procedure thereof that observed efficiency is high.
The objective of the invention is to be achieved through the following technical solutions:
Down-hole guiding height viewer of the present invention, comprise the water blockoff device, described water blockoff device has a plurality of, and a plurality of water blockoff device is cascaded by water injecting pipeline, water injecting pipeline between adjacent two water blockoff devices is provided with water filling port, and an end of described water injecting pipeline is connected with the water filling console;
Be interconnected by the outer connecting pipe road between described a plurality of water blockoff device and with play an expand tube road and be connected, an end on described expand tube road has been connected with bloated console.
Be provided with metallic framework in the described water blockoff device, described metallic framework is provided with venting cavity and water flowing chamber, and described water injecting pipeline is cascaded a plurality of water blockoff devices by the water flowing chamber;
Described venting cavity is connected with described outer connecting pipe road by outer jointing, and described venting cavity communicates with the inner chamber of water blockoff device.
Described water blockoff device comprises outer layer protection capsule and internal layer shutoff capsule; the two ends of described outer layer protection capsule and internal layer shutoff capsule are enclosed within on the metallic framework respectively; and by closed-loop outer layer protection capsule and internal layer shutoff capsule closely are pressed on the metallic framework, realize sealing.
Described water filling console comprises water-injection control device, and described water-injection control device can be according to the difference control injection flow of actual pressure in the water injecting pipeline and setting pressure.
Described bloated console is provided with pressure control device, and described pressure control device can control a swelling pressure power in the expand tube road according to the pressure of setting.
Also comprise automaton, described automaton can be controlled injection flow automatically and/or play swelling pressure power according to setting value.
Described water filling port is provided with electrically operated valve, is used to control opening or closing of water filling port.
The above-mentioned down-hole guiding height viewer of application of the present invention carries out the method that the down-hole overlying strata are led high observation, comprises step:
A, the hole of on the overlying strata of needs observation, drilling;
B, a plurality of water blockoff devices that will be cascaded push the precalculated position in the boring;
C, having passed through bloated console and set swelling pressure power, and feed gas in playing the expand tube road, a plurality of water blockoff devices are expanded and reached the pressure of setting, is multistage with described borehole sealing;
D, set water injection pressure, and, open the water filling port on the water injecting pipeline that needs on the observation position, according to the difference adjusting injection flow of the actual pressure in the water injecting pipeline and setting pressure to the water injecting pipeline water filling by the water filling console;
E, treat water injection pressure reach setting pressure and stable after, record injects this section rock stratum water injection rate;
F, according to the water injection rate of measured each section rock stratum, analyze the development condition of overlying strata internal crack.
As seen from the above technical solution provided by the invention, down-hole guiding height viewer of the present invention and observation procedure thereof, owing to comprise a plurality of water blockoff devices, and a plurality of water blockoff devices are cascaded by water injecting pipeline, water injecting pipeline between adjacent two water blockoff devices is provided with water filling port, and an end of water injecting pipeline is connected with the water filling console; Be interconnected by the outer connecting pipe road between a plurality of water blockoff devices and with play an expand tube road and be connected, an end on an expand tube road has been connected with bloated console.During use, at first on the overlying strata of needs observation, hole; A plurality of water blockoff devices that will be cascaded then push the precalculated position in the boring; Feeding gas again in playing the expand tube road, is multistage with one section borehole sealing; Then pass through the water injecting pipeline water filling, and open the water filling port on the water injecting pipeline between adjacent two water blockoff devices successively, write down the water injection rate (wastage) of this section rock stratum,, analyze the cranny development situation of this section rock stratum according to the water injection rate (wastage) of rock stratum.This invention is simple in structure, easy to use, can realize multistage shutoff simultaneously, and subsection water injection leaks hunting, the observed efficiency height, and measurement result is more reliable.Be particularly useful for permeability observation in overlying strata crack, down-hole also is applicable to the rock stratum of other occasion is observed.
Description of drawings
Fig. 1 is a down-hole guiding height viewer application state schematic diagram of the present invention;
Fig. 2 is the structural representation of a plurality of water blockoff device series connection;
Fig. 3 is the structural representation of water blockoff device;
Fig. 4 is the A-A generalized section of Fig. 3.
The specific embodiment
The preferable specific embodiment of down-hole guiding height viewer of the present invention comprises water blockoff device 1 as shown in Figure 1, and described water blockoff device 1 has a plurality of, and a plurality of water blockoff device is cascaded by water injecting pipeline 4, and an end of described water injecting pipeline 4 is connected with water filling console 12.
As shown in Figure 2, the water injecting pipeline 4 between adjacent two water blockoff 1 devices is provided with water filling port 13, and the autocontrol valve (not shown) is housed on the water filling port 13, can be electrically operated valve, also can be other autocontrol valve.
Also be interconnected between described a plurality of water blockoff device 1 by outer connecting pipe road 2 and with play an expand tube road 3 and be connected, an end on described expand tube road 3 is connecting and is playing bloated console 8, the other end is being communicated with a bloated capsule of water blockoff device.
Play bloated console 8 and be provided with pressure control device, described pressure control device can control the interior swelling pressure power in expand tube road 3 according to the pressure of setting.
Play bloated console 8 and also be provided with safety valve 5, pressure meter 6, airflow filtering device 7 and bleeder valve 11 etc.
Water filling console 12 is provided with water-injection control device, and described water-injection control device can be according to the difference control injection flow of actual pressure in the water injecting pipeline 4 and setting pressure.
Water filling console 12 also is provided with hydraulic gage 9, flow-controllable valve 10 and bleeder valve 11 etc.
Also comprise automaton in the specific embodiment of the present invention, can control injection flow automatically according to setting value and reach swelling pressure power.
The concrete mode of occupation of down-hole guiding height viewer of the present invention is such, a plurality of water blockoff devices are connected in series by water injecting pipeline 4, water injecting pipeline 4 other ends and water filling console 12 are connected to form flood pattern, and a plurality of series connection water blockoff devices 1 have connected and composed bloated plugging system by outer connecting pipe road 2, an expand tube road 3 with a bloated console 8.
A plurality of water blockoff devices 1 that at first will be cascaded are sent to the precalculated position in the boring.Preparation is finished, and can carry out measuring operation.
Opened the gas source valve (not shown) on the bloated console 8, high-pressure air source just can form path, adjust safety valve 5 before this, made swelling pressure power reach setting value, the capsule of a plurality of like this series connection water blockoff devices 1 can rise bloated under the safe gas pressure of setting simultaneously, and between a plurality of water blockoff devices 1 owing to communicate by outer connecting pipe road 2, a plugging separating becomes a plurality of segments so a plurality of series connection water blockoff device 1 is just holed this section.
Treat to open the water source valve (not shown) on the water filling console 12 after the capsule expansion sealing of hole of water blockoff device 1, high-pressure water just can form path.Set water injection pressure by the rated value of regulating flow-controllable valve 10, the pressure that hydraulic gage 9 on the water filling this moment console 12 shows in the water injecting pipeline 4, when showing pressure, hydraulic gage 9 compares with the setting water injection pressure hour, the automaton flow of control flow-controllable valve 10 automatically strengthens, reach the water injection pressure of setting with enlargement discharge, otherwise flow-controllable valve 10 can reduce flow automatically, reach specified water injection pressure to reduce flow, thereby reach the purpose of automatic control water injection pressure.
Because being disposable multistage, the present invention separates shutoff, multiple spot leaks hunting successively, water filling port 13 in each section water injecting pipeline 4 between a plurality of series connection water blockoff devices 1 is installed electric control valve, link outside the boring by multi-core cable wire, each electric control valve is controlled separately, thereby reached the purpose of segmentation control, segmentation observation.During observation, set swelling pressure power and water injection pressure, and automatic control and adjustment; By motor switch the electric control valve of to be measured section water injection pipe is opened,, after water injection pressure reaches setting value and keeps stablizing, read water yield wastage by flow-controllable valve 10 by water filling port 13 water filling in this section overlying strata; It is constant to keep water blockoff device 1 to expand then, close the motor-operated control valve of this section water injecting pipeline 4, the motor-operated control valve of another to be measured section water injecting pipeline 4 is opened, reset water injection pressure, after hydraulic gage 9 demonstration pressure reach the setting water injection pressure and keep stablizing, read water yield wastage by flow-controllable valve 10.Same method has been opened the bleeder valve 11 on the bloated console 8 after other section measurement is finished, and water blockoff device 1 air pressure reduces the back and shrinks automatically.Then, a plurality of series connection water blockoff devices are passed next position to be measured, in the moving process, 11 of the bleeder valves on the water filling console 12 needn't be opened, and keep the water in the water injecting pipeline 4, to save time and water, treat water to be bled off after all measurement finishes again.
The water blockoff device 1 of the specific embodiment of the invention, as shown in Figure 3, Figure 4, the inside of water blockoff device 1 is provided with metallic framework 16, metallic framework 16 is columnar metal dual chamber, comprise venting cavity 21 and water flowing chamber 22, be connected with an outer connecting pipe road 2 or an expand tube road 3 by outer jointing 15 outside the venting cavity 21, be connected with the capsule inner chamber of water blockoff device 1 in the venting cavity 21; Water injecting pipeline 4 is connected in series a plurality of water blockoff devices by water flowing chamber 22.The dilation of water blockoff device 1 constitutes by outer layer protection capsule 19 and internal layer shutoff capsule 20 are two-layer; capsule is special high strength and high tenacity rubber, and is simple in structure, and it is good to play bloated plugging effect; the metallic framework 16 of capsule size and water blockoff device 1 cooperatively interacts, and reaches general purpose.Outer layer protection capsule 19 and internal layer shutoff capsule 20 are enclosed within on the metallic framework 16, by closed-loop 18 capsule closely are pressed in metallic framework 16, are closed to sealing state.
Be connected with protection block 17 on the metallic framework 16 at the two ends of water blockoff device 1 respectively, the external diameter of described protection block 17 is greater than the external diameter under water blockoff device 1 nature, and when the capsule contraction was boosted, protection block 17 protection outer layer protection capsules 19 were avoided wearing and tearing.
The present invention uses the method for overlying strata internal crack under the above-mentioned down-hole guiding height viewer observation well, can realize a multistage separation shutoff, and subsection water injection leaks hunting successively.Can shorten Measuring Time, improve observed efficiency, measurement result reliability height.
Specifically comprise step:
Step 1, the hole of on the overlying strata of need observation, drilling;
Step 2, a plurality of water blockoff devices that will be cascaded push the precalculated position in the boring;
Step 3, having passed through bloated console and set swelling pressure power, and has fed in playing the expand tube road and calm the anger, made a plurality of water blockoff devices expansions and reach the pressure of setting, is a plurality of segments with one section borehole sealing to be determined;
Step 4, set water injection pressure, and, open the water filling port on the water injecting pipeline that needs on the observation position, according to the difference adjusting injection flow of the actual pressure in the water injecting pipeline and setting pressure to the water injecting pipeline water filling by the water filling console;
Step 5, treat water injection pressure reach setting pressure and stable after, the wastage of record water;
Step 6, according to each rock stratum, position wastage of boring that observation obtains, analyze overlying strata internal crack development condition.
Example: 30 meters of borehole test section length overalls are arranged, and originally one-shot measurement length is 1 meter, then needs water blockoff device displacement 30 times, each water blockoff device displacement and drilling rod water-filling need 8 fens, every segment test needs 2 minutes, and every meter test needs 10 minutes times spent altogether, and 30 meters test sections always need 300 minutes times spent altogether.Water blockoff device displacement of the present invention once can be tested 3 segments, and promptly testing bore holes length is 3 meters, then only need be with water blockoff device displacement 10 times; Each water blockoff device displacement and drilling rod water-filling need 8 fens, and every segment test needs 2 minutes, and the test of 3 segments needs 3 * 2=6 minute altogether, and the displacement of water blockoff device once needs time spent 8+6=14 branch for 3 meters altogether with test, and 30 meters long drilled holes tests then always need 140 minutes times spent altogether.As seen, owing to saved displacement of water blockoff device and drilling rod filling time, can improve measurement efficient.In addition, compare with method of testing in the past, this invention has realized that air pressure and hydraulic pressure regulates automatically, has improved the reliability of automation equipment degree and instrument performance,
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (8)

1. a down-hole guiding height viewer comprises the water blockoff device, it is characterized in that, described water blockoff device has a plurality of, and a plurality of water blockoff devices are cascaded by water injecting pipeline, and the water injecting pipeline between adjacent two water blockoff devices is provided with water filling port, and an end of described water injecting pipeline is connected with the water filling console;
Be interconnected by the outer connecting pipe road between described a plurality of water blockoff device and with play an expand tube road and be connected, an end on described expand tube road has been connected with bloated console.
2. down-hole guiding height viewer according to claim 1 is characterized in that, is provided with metallic framework in the described water blockoff device, and described metallic framework is provided with venting cavity and water flowing chamber, and described water injecting pipeline is cascaded a plurality of water blockoff devices by the water flowing chamber;
Described venting cavity is connected with described outer connecting pipe road by outer jointing, and described venting cavity communicates with the inner chamber of water blockoff device.
3. down-hole guiding height viewer according to claim 2; it is characterized in that; described water blockoff device comprises outer layer protection capsule and internal layer shutoff capsule; the two ends of described outer layer protection capsule and internal layer shutoff capsule are enclosed within on the metallic framework respectively; and by closed-loop outer layer protection capsule and internal layer shutoff capsule closely are pressed on the metallic framework, realize sealing.
4. down-hole guiding height viewer according to claim 1 is characterized in that, described water filling console comprises water-injection control device, and described water-injection control device can be according to the difference control injection flow of actual pressure in the water injecting pipeline and setting pressure.
5. down-hole guiding height viewer according to claim 1 is characterized in that, described bloated console is provided with pressure control device, and described pressure control device can control a swelling pressure power in the expand tube road according to the pressure of setting.
6. according to claim 4 or 5 described down-hole guiding height viewers, it is characterized in that, also comprise automaton, described automaton can be controlled injection flow automatically and/or play swelling pressure power according to setting value.
7. down-hole guiding height viewer according to claim 1 is characterized in that described water filling port is provided with electrically operated valve, is used to control opening or closing of water filling port.
8. an application rights requires 1 to 7 described down-hole guiding height viewer to carry out the method that the down-hole overlying strata are led high observation, it is characterized in that, comprises step:
A, the hole of on the overlying strata of needs observation, drilling;
B, a plurality of water blockoff devices that will be cascaded push the precalculated position in the boring;
C, having passed through bloated console and set swelling pressure power, and feed gas in playing the expand tube road, a plurality of water blockoff devices are expanded and reached the pressure of setting, is multistage with described borehole sealing;
D, set water injection pressure, and, open the water filling port on the water injecting pipeline that needs on the observation position, according to the difference adjusting injection flow of the actual pressure in the water injecting pipeline and setting pressure to the water injecting pipeline water filling by the water filling console;
E, treat water injection pressure reach setting pressure and stable after, record injects this section rock stratum water injection rate;
F, according to the water injection rate of measured each section rock stratum, analyze the development condition of overlying strata internal crack.
CNA2007100996794A 2007-05-28 2007-05-28 Down-hole guiding height viewer and its observation method CN101245701A (en)

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CN101886543A (en) * 2010-07-05 2010-11-17 陕西省煤炭地质测量技术中心 Exploring tube used for observing coal seam goaf fissure zone subsection water injection
CN101892841A (en) * 2010-07-05 2010-11-24 陕西省煤炭地质测量技术中心 Observation system of water injection in fractured zone in coal seam goaf
CN102561989A (en) * 2012-02-21 2012-07-11 重庆市能源投资集团科技有限责任公司 Coal mine underground hydraulic fracturing hole sealing method
CN102565859A (en) * 2011-12-31 2012-07-11 山东科技大学 Overburden water flowing fractured zone observation system and detection drilling method thereof
CN102980987A (en) * 2012-10-31 2013-03-20 山东科技大学 Simulation test stand for plugging of two ends of drill hole
CN103016007A (en) * 2012-12-05 2013-04-03 山东科技大学 Electronically controlled single-loop water-plugging overburden strata fracture detection method
CN103939143A (en) * 2014-04-17 2014-07-23 中国矿业大学 Method for measuring range of influence of crushed zones of coal bed roadway and device thereof
CN104179491A (en) * 2014-08-26 2014-12-03 山东科技大学 Ultrasonic detecting device and system for downhole rock fracture drilling
CN105134181A (en) * 2015-06-25 2015-12-09 山东科技大学 Method for multi-section blocking of covering rock damage band and synchronous leakage measuring
CN105137502A (en) * 2015-06-25 2015-12-09 山东科技大学 Segmental observation system for growth height of top-board water guiding fissure zone
CN105372410A (en) * 2015-12-09 2016-03-02 山东科技大学 Double-terminal plugging leak hunting integrated observing system
CN105386752A (en) * 2015-12-09 2016-03-09 山东科技大学 Multi-section plugging double-end observation system
CN105403930A (en) * 2015-12-09 2016-03-16 山东科技大学 Surrounding rock mining damage range segmented testing system
CN105422078A (en) * 2015-12-09 2016-03-23 山东科技大学 Segmented testing method for surrounding rock mining destruction range
CN105525910A (en) * 2015-12-09 2016-04-27 山东科技大学 Multi-section blocking and double-end observation method
CN105717019A (en) * 2016-01-28 2016-06-29 山东科技大学 Floor rock mass permeability coefficient test simulation method
CN106248911A (en) * 2016-09-27 2016-12-21 西安科技大学 A kind of single power source dual pathways country rock mining induced fissure detection system
CN106595986A (en) * 2016-12-13 2017-04-26 山东科技大学 Bottom plate mining failure zone segmental observation method
CN106644306A (en) * 2016-12-13 2017-05-10 山东科技大学 Segmented observation system for floor mining destruction zone

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CN101892841A (en) * 2010-07-05 2010-11-24 陕西省煤炭地质测量技术中心 Observation system of water injection in fractured zone in coal seam goaf
CN101886543A (en) * 2010-07-05 2010-11-17 陕西省煤炭地质测量技术中心 Exploring tube used for observing coal seam goaf fissure zone subsection water injection
CN102565859A (en) * 2011-12-31 2012-07-11 山东科技大学 Overburden water flowing fractured zone observation system and detection drilling method thereof
CN102561989A (en) * 2012-02-21 2012-07-11 重庆市能源投资集团科技有限责任公司 Coal mine underground hydraulic fracturing hole sealing method
CN102980987B (en) * 2012-10-31 2014-12-17 山东科技大学 Simulation test stand for plugging of two ends of drill hole
CN102980987A (en) * 2012-10-31 2013-03-20 山东科技大学 Simulation test stand for plugging of two ends of drill hole
CN103016007A (en) * 2012-12-05 2013-04-03 山东科技大学 Electronically controlled single-loop water-plugging overburden strata fracture detection method
CN103016007B (en) * 2012-12-05 2015-05-27 山东科技大学 Electronically controlled single-loop water-plugging overburden strata fracture detection method and probing machine
CN103939143B (en) * 2014-04-17 2015-12-30 中国矿业大学 The assay method of heading zone of fracture influence basin and device thereof
CN103939143A (en) * 2014-04-17 2014-07-23 中国矿业大学 Method for measuring range of influence of crushed zones of coal bed roadway and device thereof
CN104179491A (en) * 2014-08-26 2014-12-03 山东科技大学 Ultrasonic detecting device and system for downhole rock fracture drilling
CN104179491B (en) * 2014-08-26 2018-12-28 西安科技大学 Underground rock cranny drilling supersonic sounding device and system
CN105137502B (en) * 2015-06-25 2017-05-24 山东科技大学 Segmental observation system for growth height of top-board water guiding fissure zone
CN105134181A (en) * 2015-06-25 2015-12-09 山东科技大学 Method for multi-section blocking of covering rock damage band and synchronous leakage measuring
CN105137502A (en) * 2015-06-25 2015-12-09 山东科技大学 Segmental observation system for growth height of top-board water guiding fissure zone
CN105372410A (en) * 2015-12-09 2016-03-02 山东科技大学 Double-terminal plugging leak hunting integrated observing system
CN105386752A (en) * 2015-12-09 2016-03-09 山东科技大学 Multi-section plugging double-end observation system
CN105422078A (en) * 2015-12-09 2016-03-23 山东科技大学 Segmented testing method for surrounding rock mining destruction range
CN105525910A (en) * 2015-12-09 2016-04-27 山东科技大学 Multi-section blocking and double-end observation method
CN105525910B (en) * 2015-12-09 2018-05-08 山东科技大学 Multistage blocks both-end observation procedure
CN105422078B (en) * 2015-12-09 2018-03-13 山东科技大学 Country rock Mining failure scope sectionalization test method
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CN105717019B (en) * 2016-01-28 2018-04-06 山东科技大学 Floor rock infiltration coefficient test simulation method
CN105717019A (en) * 2016-01-28 2016-06-29 山东科技大学 Floor rock mass permeability coefficient test simulation method
CN106248911A (en) * 2016-09-27 2016-12-21 西安科技大学 A kind of single power source dual pathways country rock mining induced fissure detection system
CN106248911B (en) * 2016-09-27 2018-05-11 西安科技大学 A kind of single power source binary channels country rock mining induced fissure detection system
CN106595986A (en) * 2016-12-13 2017-04-26 山东科技大学 Bottom plate mining failure zone segmental observation method
CN106644306B (en) * 2016-12-13 2018-09-25 山东科技大学 Bottom plate Mining failure band is segmented observation system
CN106644306A (en) * 2016-12-13 2017-05-10 山东科技大学 Segmented observation system for floor mining destruction zone

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Application publication date: 20080820