CN109580450B - Rock burst stress monitoring method adopting radioactive tracer - Google Patents
Rock burst stress monitoring method adopting radioactive tracer Download PDFInfo
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- CN109580450B CN109580450B CN201811353104.5A CN201811353104A CN109580450B CN 109580450 B CN109580450 B CN 109580450B CN 201811353104 A CN201811353104 A CN 201811353104A CN 109580450 B CN109580450 B CN 109580450B
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- 239000011435 rock Substances 0.000 title claims abstract description 79
- 239000000700 radioactive tracer Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 84
- 239000001257 hydrogen Substances 0.000 claims abstract description 44
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- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 31
- 230000006835 compression Effects 0.000 claims description 30
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- 239000000941 radioactive substance Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 claims description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 229940015043 glyoxal Drugs 0.000 claims description 6
- 240000003183 Manihot esculenta Species 0.000 claims description 4
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- OCWMFVJKFWXKNZ-UHFFFAOYSA-L lead(2+);oxygen(2-);sulfate Chemical compound [O-2].[O-2].[O-2].[Pb+2].[Pb+2].[Pb+2].[Pb+2].[O-]S([O-])(=O)=O OCWMFVJKFWXKNZ-UHFFFAOYSA-L 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 claims description 3
- XXWYUBYMBOTAGQ-UHFFFAOYSA-N 6-diazo-4,5-dinitrocyclohexa-2,4-dien-1-ol Chemical compound OC1C=CC([N+]([O-])=O)=C([N+]([O-])=O)C1=[N+]=[N-] XXWYUBYMBOTAGQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000003570 air Substances 0.000 description 76
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 28
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000011777 magnesium Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 238000004880 explosion Methods 0.000 description 7
- 238000006303 photolysis reaction Methods 0.000 description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 150000002431 hydrogen Chemical class 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052770 Uranium Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
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- 239000010720 hydraulic oil Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000011895 specific detection Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010130 dispersion processing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
- G01N15/0893—Investigating volume, surface area, size or distribution of pores; Porosimetry by measuring weight or volume of sorbed fluid, e.g. B.E.T. method
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- 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
- G01N3/40—Investigating hardness or rebound hardness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a rock burst stress monitoring method adopting a radioactive tracer, which comprises the following steps: 1) selecting tracer micro powder; 2) mixing a tracer with hydrogen and air to prepare tracer mixed gas; 3) and (4) pressing the tracer mixed gas into the rock stratum along the fracture of the monitored rock mass, and detecting the proceeding path of the tracer mixed gas. The invention also discloses a device for monitoring rock burst stress by adopting the radioactive tracer, and the method can quickly and accurately confirm rock stress and cracks thereof, discover high-stress broken rock stratum as soon as possible and avoid safety accidents. The device can store the tracer mixed gas for use at any time, has large storage capacity and high safety, and can quickly confirm the stress and the fracture of the rock.
Description
Technical Field
The invention belongs to the technical field of petrochemical and energy engineering, and particularly relates to a rock burst stress monitoring method by using a radioactive tracer.
Background
Rock burst is a phenomenon that elastic deformation potential energy accumulated in a rock body is suddenly and violently released under a certain condition, so that the rock bursts and is ejected. Typically in class I surrounding rocks.
When a river exists near a mountain or the groundwater level is high, groundwater intrudes under the mountain, and at this time, the groundwater is subjected to the pressure of the weight of the mountain, thereby generating high pressure. If the mountain body has cracks, underground high-pressure water can go up along the cracks of the mountain body. This is how high mountain is and how high water is in folk. After high-pressure water enters a mountain crack, air in the crack can find a path around under the pressure, and if an outlet is found on the surface of the mountain, the outlet can possibly be developed into a spring hole. If no exit can be found, high pressure air masses are formed in the mountain. In tunnel construction, when the tunnel is driven to the vicinity of a high-pressure gas cluster, rock burst may be caused. Therefore, the stress and the crack of the rock need to be confirmed before construction, and the construction safety is improved.
Disclosure of Invention
The first purpose of the invention is to provide a rock burst stress monitoring method by adopting a radioactive tracer, which can quickly and accurately confirm rock stress and cracks thereof, discover high-stress broken rock stratum as soon as possible and avoid safety accidents.
The technical scheme adopted by the invention for realizing the first purpose is as follows: a rock burst stress monitoring method adopting radioactive tracers comprises the following steps:
1) selecting tracer micro powder;
2) mixing a tracer with hydrogen and air to prepare tracer mixed gas;
3) and (4) pressing the tracer mixed gas into the rock stratum along the fracture of the monitored rock mass, and detecting the proceeding path of the tracer mixed gas.
The invention adopts the radioactive substance micro powder to mix with air, then utilizes the air to bring the radioactive substance into the rock fractures, and then detects the radioactive substance through the detection equipment, and the specific detection method comprises but is not limited to the following steps: 201410416152.X, the invention reduces the whole quality of tracer mixed gas by proportionally mixing the radioactive substance micro powder, hydrogen and air, ensures that the mixed gas can fully enter each crack of the rock, obtains waves with approximate output energy after proportionally mixing the air and the hydrogen, mixes the waves and outputs the waves to weaken the photolysis reaction of methane in the air, reduces the explosion limit of the methane in the air, and rapidly and accurately confirms the stress and the cracks of the rock under the condition of ensuring the safety.
Preferably, the tracer fine powder is a radioactive substance insoluble in water, such as uranium, but is not limited to this substance, and the high-stress fractured rock formation is found by using the characteristics of the radioactive substance and a special detection device.
Preferably, the mixing ratio of the tracer to the air and the hydrogen is 10-30: 90: the method comprises the following steps of 1, when hydrogen and air are arranged in the proportion, firstly reducing the overall mass of mixed gas, secondly mixing the air and the hydrogen according to the proportion to obtain green light output energy and wave with the wavelength close to the green light output energy and mixing the green light output energy and the wave to output, so that the photodecomposition reaction of methane in the air is weakened, the explosion limit of the methane in the air is reduced, and then selecting the radioactive substance micro-powder amount according to the required proportion to be mixed with the hydrogen and the air according to the size of the detected rock, so that the stress and the crack of the rock can be rapidly and accurately confirmed under the condition of ensuring the safety.
Preferably, the pressure of the tracer mixed gas pressed into the rock stratum along the fracture of the monitored rock body is 30-45 MPa, so that the mixed gas repeatedly enters into all fractures of the rock, the high-stress broken rock stratum is discovered as soon as possible, and safety accidents are avoided.
The second purpose of the invention is to provide a rock burst stress monitoring device adopting radioactive tracer, which can store tracer mixed gas for use at any time, has large storage capacity and high safety, and can quickly confirm rock stress and fracture thereof.
The technical scheme adopted by the invention for realizing the second purpose is as follows: the utility model provides an adopt device of radioactive tracer's rock burst stress monitoring, includes raw materials bottle, and the pump is connected to raw materials bottle one end, and the compression cylinder is connected to the other end, and compression cylinder gas outlet sets up with the rock mass cooperation, and raw materials bottle side still is connected with the gas injector, is equipped with flowmeter and valve on gas injector and the raw materials bottle connecting pipe. The invention adopts the compression cylinder barrel to temporarily store the mixed gas, outputs the mixed gas according to the actual pressing amount requirement, improves the utilization rate of the mixed gas, can output the mixed gas at any time and any place by temporarily storing the mixed gas, simultaneously arranges the gas injector at the side of the raw material bottle to inject hydrogen into the raw material bottle, can obtain waves with approximate output energy after mixing air and hydrogen according to a proportion and mix and output the waves to weaken the photolysis reaction of methane in the air, reduces the explosion limit of the methane in the air, and realizes the rapid and accurate confirmation of the stress and the crack of the rock under the condition of ensuring the safety.
Preferably, the gas injector comprises a hollow bottle body, a first feeding pipe, a second feeding pipe and a third feeding pipe are respectively arranged above the side of the bottle body, a drain pipe is arranged at the bottom of the bottle body, a gas pipe connected with a raw material bottle is connected with the upper portion of the bottle body in a through mode, a net-shaped partition plate with a trapezoidal section is arranged in the bottle body, and the partition plate is connected with the inner wall of the bottle body in a matched mode. The first feeding pipe is used for feeding magnesium particles, the second feeding pipe is used for feeding reaction water, the drain pipe is used for discharging water generated by reaction, the third feeding pipe is used for feeding aluminum powder to promote hydrogen generation, and the magnesium particles and the reaction water are usedThe reaction is carried out to obtain hydrogen (reaction formula Mg + 2H)2O→Mg(OH)2+H2) The obtained hydrogen enters the raw material bottle through the air pipe, is mixed with the radioactive substance micro powder in the raw material bottle and the air entering the raw material bottle, the entering amount of the hydrogen is recorded by a flow meter, the input amount of the hydrogen is controlled by a valve, the sufficient hydrogen is obtained in a short time to meet the requirement of fast mixing with the radioactive substance micro powder and the air, and the aluminum powder is put into the third feeding pipe to promote the reaction of magnesium particles and water to fast obtain the hydrogen ((2 AlH)3+3H2O→Al2O3+6H2) The mixing processing time of the tracer mixed gas is shortened, further, the multilayer net-shaped partition plates with trapezoidal sections are arranged in the bottle body, the medium entering the bottle body can be subjected to dispersion processing, the accumulation of the medium is avoided, the reaction speed is reduced, and the multilayer arrangement can also play a role of slowing down the rising of the generated hydrogen so as to prevent the excessive generation speed of the added hydrogen of the aluminum powder and influence the mixing speed and the effect of the hydrogen, the air and the radioactive substance micro powder.
Preferably, the inlet and the outlet of the compression cylinder barrel are provided with valves, the upper part in the compression cylinder barrel is provided with an air bag for collecting tracer mixed gas, the lower part of the air bag is provided with a piston which is connected with the compression cylinder barrel in a matched manner, the lower end of the compression cylinder barrel is connected with an oil storage tank, the joint of the compression cylinder barrel and the oil storage tank is provided with a pressure gauge, and the oil storage tank is connected with a displacement pump. When tracer mist is injected in need, open the valve of compression cylinder business turn over end, close raw material bottle exit end valve simultaneously, open the solenoid valve, start the displacement pump, act on the piston in compressing the cylinder with the hydraulic oil pumping of batch oil tank and make its rebound, thereby realize with tracer mist pressure pump go into the rock mass in, when piston in the compression cylinder goes upward to the top of compression cylinder, because the rigid extrusion, the pump pressure rises to the confining pressure of point contact manometer fast, the displacement pump stop work, the realization is with in the tracer mist injection rock mass.
Preferably, the air bag is in a cone shape, the bottom of the air bag is in a hemispherical shape, and the side surface of the air bag is provided with an outer convex cambered surface-shaped film groove in a surrounding mode. The air bag is filled with the mixed gas continuously, the end part of the air bag is pressed downwards to push the piston to slide downwards, when the mixed gas is needed to be used, the mixed gas is discharged out of the compression cylinder barrel through the upward movement of the piston, if the tracer mixed gas is excessively pressurized into the air bag, the mixed gas further enters the membrane tank to expand the storage of the mixed gas, expand the volume of the mixed gas and avoid overlarge internal pressure, the storage capacity of the mixed gas of the tracer is large, the safety is high, and the stress and the cracks of rocks can be quickly confirmed.
Compared with the prior art, the invention has the beneficial effects that: the invention reduces the whole quality of the tracer mixed gas by proportionally mixing the radioactive substance micro powder, the hydrogen and the air, ensures that the mixed gas can fully enter each crack of the rock, obtains waves with approximate output energy after proportionally mixing the air and the hydrogen, mixes the waves and outputs the waves to weaken the photodecomposition reaction of methane in the air, reduces the explosion limit of the methane in the air, and realizes the quick and accurate confirmation of the stress and the crack of the rock under the condition of ensuring the safety.
The method for monitoring rock burst stress by adopting the radioactive tracer, which is provided by the invention, makes up for the defects of the prior art, and has the advantages of reasonable design and convenient operation.
Drawings
Fig. 1 is a schematic flow diagram of a method of rock burst stress monitoring using a radioactive tracer according to the present invention.
FIG. 2 is a schematic view of a rock burst stress monitoring device using radioactive tracers according to the present invention;
FIG. 3 is a schematic view of a gas injector of the present invention;
fig. 4 is a schematic view of the structure of the air bag of the present invention.
Description of reference numerals: 1. a gas injector; 101. a first feed tube; 102. a second feed tube; 103. a drain pipe; 104. an air tube; 105. a third feed pipe; 106. a partition plate; 107. a flow meter; 2. a raw material bottle; 3. a connecting pipe; 4. an electromagnetic valve; 5. a rock mass; 6. an air bag; 601. a film groove; 7. a piston; 8. a pressure gauge; 9. an inflator pump; 10. a positive displacement pump; 11. compressing the cylinder barrel; 12. a valve; 13. an oil storage tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
as shown in fig. 2-4, the device for monitoring rock burst stress by using radioactive tracer comprises a raw material bottle 2, wherein one end of the raw material bottle 2 is connected with an inflator pump 9, the other end of the raw material bottle is connected with a compression cylinder 11, the gas outlet of the compression cylinder 11 is matched with a rock mass 5, a gas injector 1 is further connected to the side of the raw material bottle 2, and a flow meter 107 and a valve are arranged on a connecting pipe between the gas injector 1 and the raw material bottle 2. The invention adopts the compression cylinder 11 to temporarily store the mixed gas, outputs the mixed gas according to the actual pressing amount requirement, improves the utilization rate of the mixed gas, can output the mixed gas at any time and any place by temporarily storing the mixed gas, simultaneously arranges the gas injector 1 at the side of the raw material bottle 2 to inject hydrogen into the raw material bottle 2, mixes the air and the hydrogen according to the proportion to obtain the wave with approximate output energy and mixes and outputs the wave to weaken the photolysis reaction of methane in the air, reduces the explosion limit of the methane in the air, and realizes the rapid and accurate confirmation of the stress and the crack of the rock under the condition of ensuring the safety.
The gas injector 1 comprises a hollow bottle body, a first feeding pipe 101, a second feeding pipe 102 and a third feeding pipe 105 are respectively arranged above the side of the bottle body, a drain pipe 103 is arranged at the bottom of the bottle body, a gas pipe 104 connected with the raw material bottle 2 is connected with the upper part of the bottle body in a through way, a net-shaped partition plate 106 with a trapezoidal section is arranged in the bottle body, and the partition plate 106 is connected with the inner wall of the bottle body in a matching way. A first feed pipe 101 for feeding magnesium particles, a second feed pipe 102 for feeding reaction water, a drain pipe 103 for discharging water generated by the reaction, and a third feed pipe 105 for feeding aluminum powder to promote hydrogen generation, and reacting the magnesium particles with the reaction water to obtain hydrogen (reactive Mg + 2H)2O→Mg(OH)2+H2) The obtained hydrogen enters the raw material bottle 2 through the air pipe 104 to be mixed with the radioactive micro powder in the raw material bottle 2 and the air entering the raw material bottle, the entering amount of the hydrogen is recorded by the flow meter 107, the hydrogen input amount is controlled by the valve, enough hydrogen is obtained in a short time to meet the requirement of fast mixing with the radioactive micro powder and the air, and aluminum powder is put into the third feeding pipe 105 to promote the reaction of magnesium particles and water to fast obtain the hydrogen ((2 AlH)3+3H2O→Al2O3+6H2) The mixing processing time of the tracer mixed gas is shortened, the multi-layer mesh partition plate 106 with the trapezoidal cross section is further arranged in the bottle body, the medium entering the bottle body can be dispersed, the accumulation of the medium is avoided, the reaction speed is reduced, and the multi-layer arrangement can also play a role in slowing down the rising of the generated hydrogen so as to prevent the excessive generation speed of the added hydrogen of the aluminum powder and influence the mixing speed and the effect of the hydrogen, the air and the radioactive substance micro powder.
The inlet and the outlet of the compression cylinder barrel 11 are provided with valves 12, the upper part in the compression cylinder barrel 11 is provided with an air bag 6 for collecting tracer mixed gas, the lower part of the air bag 6 is provided with a piston 7 which is connected with the compression cylinder barrel 11 in a matching way, the lower end of the compression cylinder barrel 11 is connected with an oil storage tank 13, the joint is provided with a pressure gauge 8, and the oil storage tank 13 is connected with a displacement pump 10. When tracer gas mixture is injected in need, open valve 12 of 11 business turn over ends of compression cylinder, close 2 exit end valves of raw materials bottle simultaneously, open solenoid valve 4, start positive displacement pump 10, act on piston 7 in compressing cylinder 11 with the hydraulic oil pumping of batch oil tank 13 and make its rebound, thereby realize with tracer gas mixture pump in 5 rocks, when piston 7 in compressing cylinder 11 goes upward to the top of compression cylinder 11, because rigid extrusion, the pump pressure rises to the confining pressure of point contact manometer 8 fast, positive displacement pump 10 stop work, the realization is injected into 5 rocks with tracer gas mixture.
The air bag 6 is in a cone shape, the bottom of the air bag is in a hemispherical shape, and the side surface of the air bag 6 is provided with an outer convex cambered surface-shaped film groove 6 in a surrounding way. The air bag 6 is filled with the mixed gas continuously added, the end part of the air bag 6 is pressed downwards to push the piston 7 to slide downwards, when the mixed gas is needed to be used, the mixed gas is discharged out of the compression cylinder 11 through the upward movement of the piston 7, if the mixed gas of the tracer is pressed into the air bag 6, the mixed gas further enters the membrane tank 601 to expand the storage capacity of the mixed gas, the volume of the mixed gas is expanded, the excessive internal pressure is avoided, the radioactive substance micro powder or air is likely to be settled in the storage process of the mixed gas, the membrane tank 601 rebounds due to the pressure release of the mixed gas in the moment when the mixed gas is discharged out of the compression cylinder 11, the air in the membrane tank 601 rapidly flows towards the center of the air bag 6 to disturb the air in the air bag 6, so that the radial substance micro powder, the air and the hydrogen temporarily stored in the air bag 6 are mixed and distributed more uniformly, and the storage capacity of the mixed gas of the tracer is large, the safety is high, and the stress and the fracture of the rock can be quickly confirmed.
The air bag 6 of the present invention is prepared by the following process: weighing cassava native starch, vinyl chloride-vinyl acetate copolymer, SA and deionized water, adding into a three-neck flask, gelatinizing at 94-96 deg.C for 1.5h, adding appropriate amount of hydrated tribasic lead sulfate, glycerol, dinitrodiazophenol, 2, 6-tertiary butyl-4-methylphenol and glyoxal, stirring at 85 deg.C at high speed, reacting for 0.5h, casting at 70 deg.C in a polytetrafluoroethylene mold to form a film, drying at 80 deg.C for 3h, removing the film, placing in a storage tank with humidity of 65% for 7d to obtain an air bag 6, in the preparation process, glyoxal and hydroxyl react to form more hinged chains, so that the strength of a macromolecular chain is improved, the acting force between molecules is enhanced, and through the synergistic effect of a proper amount of hydrated tribasic lead sulfate and glyoxal, the molecules in the reaction of glyoxal and hydroxyl are prevented from forming a net structure, the cross-linked chains are prevented from limiting the sliding among the molecules, and the tensile strength and the elastic deformation performance of the prepared air bag 6 are improved.
The above-mentioned air bag 6 was produced and then tested by a TS2000-S type multifunctional tester using GB/T1040-. The preparation process adopts the following raw materials in parts by weight: 20-35 parts of cassava native starch, 10-18 parts of deionized water, 2-3 parts of hydrated tribasic lead sulfate, 12-15 parts of glycerol, 3-8 parts of glyoxal, 1-1.5 parts of dinitrodiazophenol, 5-7 parts of vinyl chloride-vinyl acetate resin and 2-4 parts of 2, 6-tertiary butyl-4-methylphenol. The three-neck flask is selected according to actual usage, including but not limited to: 250mL, 500mL, 1000 mL.
Example 2:
as shown in fig. 1, a rock burst stress monitoring method using radioactive tracer includes the following steps:
1) selecting tracer micro powder;
2) mixing a tracer with hydrogen and air to prepare tracer mixed gas;
3) and (4) pressing the tracer mixed gas into the rock stratum along the fracture of the monitored rock mass, and detecting the proceeding path of the tracer mixed gas.
The invention adopts the radioactive substance micro powder to mix with air, then utilizes the air to bring the radioactive substance into the rock fractures, and then detects the radioactive substance through the detection equipment, and the specific detection method comprises but is not limited to the following steps: 201410416152.X, the invention reduces the whole quality of tracer mixed gas by proportionally mixing the radioactive substance micro powder, hydrogen and air, ensures that the mixed gas can fully enter each crack of the rock, obtains waves with approximate output energy after proportionally mixing the air and the hydrogen, mixes the waves and outputs the waves to weaken the photolysis reaction of methane in the air, reduces the explosion limit of the methane in the air, and rapidly and accurately confirms the stress and the cracks of the rock under the condition of ensuring the safety.
The tracer micropowder is a radioactive substance insoluble in water, such as uranium, but is not limited to the substance, and the high-stress fractured rock stratum can be found by utilizing the characteristics of the radioactive substance and special detection equipment.
The mixing ratio of the tracer to air and hydrogen is 10-30: 90: the method comprises the following steps of 1, when hydrogen and air are arranged in the proportion, firstly reducing the overall mass of mixed gas, secondly mixing the air and the hydrogen according to the proportion to obtain green light output energy and wave with the wavelength close to the green light output energy and mixing the green light output energy and the wave to output, so that the photodecomposition reaction of methane in the air is weakened, the explosion limit of the methane in the air is reduced, and then selecting the radioactive substance micro-powder amount according to the required proportion to be mixed with the hydrogen and the air according to the size of the detected rock, so that the stress and the crack of the rock can be rapidly and accurately confirmed under the condition of ensuring the safety.
The pressure of the tracer mixed gas pressed into the rock stratum along the monitored rock body fracture is 30-45 MPa, so that the mixed gas repeatedly enters into all fractures of the rock, the high-stress broken rock stratum is discovered as soon as possible, and safety accidents are avoided.
After the mixed gas is injected into the rock 5, the rock is tested by using a rock indentation hardness tester (HYY-B microcomputer controlled rock indentation hardness tester) manufactured by the Jinan one-nuo century testing instrument Limited.
The existing equipment in the apparatus of the present invention should be known to those skilled in the art and commercially available, for example, the flow meter used in the present invention is a tiny gas flow meter manufactured by Shanghai porcelain instruments and meters Limited, model number: XD-600 MD; the inflator pump adopts a crown JP-40HV compression pump; the remaining existing components are not illustrated in detail here.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A rock burst stress monitoring method adopting radioactive tracers comprises the following steps:
1) selecting tracer micro powder;
2) mixing a tracer with hydrogen and air to prepare tracer mixed gas;
3) pressing the tracer mixed gas into the rock stratum along the fracture of the monitored rock mass, and detecting the proceeding path of the tracer mixed gas;
the adopted device for the rock burst stress monitoring method by adopting the radioactive tracer comprises a raw material bottle (2), wherein one end of the raw material bottle (2) is connected with an inflator pump (9), the other end of the raw material bottle is connected with a compression cylinder barrel (11), an air outlet of the compression cylinder barrel (11) is matched with a rock body (5) to be arranged, and the device is characterized in that: a gas injector (1) is also connected to the side of the raw material bottle (2), and a flow meter (107) and a valve are arranged on a connecting pipe between the gas injector (1) and the raw material bottle (2); the gas injector (1) comprises a hollow bottle body, a first feeding pipe (101), a second feeding pipe (102) and a third feeding pipe (105) are respectively arranged above the side of the bottle body, a drain pipe (103) is arranged at the bottom of the bottle body, an air pipe (104) connected with a raw material bottle (2) is connected to the upper part of the bottle body in a penetrating manner, a net-shaped partition plate (106) with a trapezoidal section is arranged in the bottle body, and the partition plate (106) is connected with the inner wall of the bottle body in a matching manner; valves (12) are arranged at the inlet and the outlet of the compression cylinder barrel (11), an air bag (6) for collecting tracer mixed gas is arranged at the upper part in the compression cylinder barrel (11), a piston (7) which is matched and connected with the compression cylinder barrel (11) is arranged below the air bag (6), the lower end of the compression cylinder barrel (11) is connected with an oil storage tank (13), a pressure gauge (8) is arranged at the joint, and the oil storage tank (13) is connected with a displacement pump (10); the air bag (6) is cone-shaped, the bottom of the air bag is hemispherical, and the side surface of the air bag (6) is provided with an outer convex arc surface-shaped film groove in a surrounding manner;
the air bag (6) is prepared by adopting the following process: weighing cassava native starch, vinyl chloride-vinyl acetate copolymer, SA and deionized water, adding the weighed cassava native starch, vinyl chloride-vinyl acetate copolymer, SA and deionized water into a three-neck flask, gelatinizing for 1.5h at 94-96 ℃, adding a proper amount of hydrated tribasic lead sulfate, glycerol, dinitrodiazophenol, 2, 6-tertiary butyl-4-methylphenol and glyoxal, stirring at a high speed at 85 ℃, reacting for 0.5h, casting at 70 ℃ in a polytetrafluoroethylene mold to form a film, drying for 3h at 80 ℃, uncovering the film, and placing in a storage tank with the humidity of 65% for 7d to obtain the air bag (6).
2. A method of rock burst stress monitoring using a radioactive tracer according to claim 1, wherein: the tracer micro powder is a radioactive substance insoluble in water.
3. A method of rock burst stress monitoring using a radioactive tracer according to claim 1, wherein: the mixing ratio of the tracer to air and hydrogen is 10-30: 90: 1.
4. a method of rock burst stress monitoring using a radioactive tracer according to claim 1, wherein: and the pressure of the tracer mixed gas pressed into the rock stratum along the monitored rock fracture is 30-45 MPa.
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