CN110981660B - Rock coal pre-cracking agent and preparation method thereof - Google Patents
Rock coal pre-cracking agent and preparation method thereof Download PDFInfo
- Publication number
- CN110981660B CN110981660B CN201911226787.2A CN201911226787A CN110981660B CN 110981660 B CN110981660 B CN 110981660B CN 201911226787 A CN201911226787 A CN 201911226787A CN 110981660 B CN110981660 B CN 110981660B
- Authority
- CN
- China
- Prior art keywords
- cracking agent
- mixing
- rock coal
- coal pre
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
- C06B29/16—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal with a nitrated organic compound
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0008—Compounding the ingredient
- C06B21/0025—Compounding the ingredient the ingredient being a polymer bonded explosive or thermic component
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/007—Ballistic modifiers, burning rate catalysts, burning rate depressing agents, e.g. for gas generating
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/22—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate the salt being ammonium perchlorate
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
Abstract
The invention provides a rock coal pre-cracking agent and a preparation method thereof. The presplitting agent does not contain elemental metal powder, the combustion temperature of the presplitting agent is between 2800K and 3200K, and the actual specific volume is more than 600L/kg; the actual burning rate of 3MPa is more than 100mm/s, the actual burning rate of 5MPa is more than 200mm/s, and the burning rate pressure index of 1-10 MPa is not less than 1.5. The rock coal pre-cracking agent has good safety performance, the friction sensitivity and the impact sensitivity are not more than 20%, and the electrostatic spark sensitivity is more than 120 mJ. The 5s delay period explosion point is more than 300 ℃, the danger level belongs to 1.3, the rock coal pre-cracking agent has simple production process and low cost, does not need solidification and granulation, and is suitable for mass production. It is suitable for the fields of rock, coal bed, mine blasting and the like.
Description
Technical Field
The invention belongs to the technical field of pyrotechnic composition, and particularly relates to a rock coal pre-cracking agent and a preparation method thereof.
Background
Coal is the non-renewable strategic resource with the largest reserve and the widest distribution in China. The coal yield of Chinese large and medium coal mines is more than 2 million and 35 hundred million tons per year.
In China, the situation of coexistence of blasting mining, general mining and fully mechanized mining (continuous mining) is gradually formed from the initial development stages of hand mining, blasting mining, general mining and fully mechanized mining (continuous mining), and fully mechanized mining is the process with the highest mechanization degree and the most adoption for medium and large underground coal mines. Regardless of the mining process, the loosening and pre-cracking of the coal seam are the core problems of continuous research.
At present, the existing or developing pre-splitting technology at home and abroad mainly comprises: 1) hydraulic fracturing technology for hydraulic punching and hydraulic fracturing by using a high-pressure water pump; 2) a loosening blasting technology based on detonator explosive; 3) a carbon dioxide miner based gas impingement technique; the hydraulic fracturing technology has a fracturing effect far from the expected effect, the blasting power of detonators and explosives is huge, but the action range is small, the shock wave is large, and the coal caving effect barely meets the operation requirement after the blasting amount is increased; the carbon dioxide blaster has complex equipment, needs to inject liquid carbon dioxide, and cannot be used for top coal caving and top cutting operation.
Disclosure of Invention
The invention aims to provide a rock coal pre-cracking agent and a preparation method thereof, wherein the rock coal pre-cracking agent has sensitivity to pressure intensity, can explode in a short time (millimeter level) to generate high-speed and high-pressure gas to act on a rock stratum and a coal seam, and quickly boost the pressure to enable the acting force to exceed the fracture stress of the rock stratum and the coal seam to form a plurality of radial cracks which cannot be healed, so that the aim of increasing the yield of rock coal is fulfilled.
The technical scheme of the invention is that the rock coal pre-cracking agent comprises the following components in percentage by mass: adhesive: 1.0% -2.5%; plasticizer: 1.0% -2.5%; oxidizing agent: 60% -72%; fuel: 25 to 35 percent; combustion speed regulator: 0.5 to 2.0 percent; the fuel is guanidine nitrate, carbon powder and organic-inorganic hybrid molecular perovskite type high-energy substance (H)2dabco)2+[M+(ClO4 -)3]The composition of (1); said (H)2dabco)2+[M+(ClO4 -)3]Abbreviated DAP, wherein H2dabco is triethylenediamine, M+Is Na+、K+、Ru+、NH4 +One kind of (1).
Further, the particle size range of the guanidine nitrate is d being not less than 60 mu m50Less than or equal to 100 mu m, the content is as followsThe mass fraction does not exceed 1/3 of the total fuel amount.
Further, the particle size range of the carbon powder is d50Less than or equal to 10 mu m, and the content of the fuel does not exceed 1/4 of the total fuel by mass fraction.
Further, the particle size range of the DAP is not less than 40 d50Less than or equal to 120 mu m, and has the function of improving the burning rate and burning rate pressure index of the rock coal pre-cracking agent. Further, the adhesive is one or a combination of hydroxyl-terminated polybutadiene, carboxyl-terminated polybutadiene and liquid phenolic resin; the plasticizer is one or more of dioctyl sebacate, diisooctyl sebacate and glyceryl Triacetate (TA).
Further, the oxidant is potassium perchlorate.
Further, the above potassium perchlorate is classified into group I, group II, group III; wherein the particle size d of the class I potassium perchlorate5010 to 30 mu m, the content of the potassium perchlorate is 15 to 35 percent of the total mass of the potassium perchlorate, and the granularity d of the II type potassium perchlorate5040-80 μm, the content of the potassium perchlorate is 45-85 percent of the total mass of the potassium perchlorate, and the granularity d of the III class potassium perchlorate50100-150 μm, and the content is 0-15% of the total weight of the potassium perchlorate. The oxidant adopts particle grading, and can further regulate and control the burning rate of the rock coal pre-cracking agent.
Further, the combustion speed regulator is a composition of ferric oxide and ferrocene; its particle size range d50≤5μm。
The invention also provides a preparation method of the rock coal pre-cracking agent, which comprises the following steps:
(1) weighing the substances according to the formula, adding the adhesive, the plasticizer, the combustion speed regulator and the fuel DAP into a vertical mixer, and mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(2) adding fuel carbon powder and guanidine nitrate into a vertical mixer for mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(3) adding half of the oxidant by weight into a vertical mixer for mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(4) adding the other half of the oxidant into a vertical mixer for mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(5) discharging to obtain the rock coal pre-cracking agent.
The principle of the invention is that rock coal pre-cracking agent is used for quick combustion, then deflagration is carried out, and finally the rock coal pre-cracking agent is converted into low-speed detonation, and meanwhile, the rock stratum and the coal bed can be fractured and blasted.
The invention is based on the burning rate formula r ═ aPnThe formula is designed, the value a and the value n are improved as much as possible, and the value a and the value n meet the requirements through a large number of tests.
According to the invention, a p-t curve of the rock coal pre-cracking agent is obtained through a 100ml closed exploder test, and a pressure inflection point (5MPa) is obtained through the p-t curve. The invention aims to improve the basic burning rate as much as possible, thereby improving the burning rate at the pressure inflection point (5MPa), so that the detonation can be realized in a very short time, and finally the purpose of detonation is achieved.
The invention adopts the grading of oxidant and fuel particles to enable the medicament to form a better natural accumulation state, and the fuel DAP in the invention can not only improve the combustion temperature, but also improve the combustion speed and the combustion speed pressure index, and can greatly improve the combustion speed and the pressure index of the rock coal pre-cracking agent through the synergistic action of the fuel DAP and combustion catalyst iron oxide and ferrocene, so that the rock coal pre-cracking agent has extremely high combustion speed and is sensitive to pressure, the pressure can be quickly established under the closed condition, the deflagration can be realized in a shorter time (millimeter level), high-speed and high-pressure gas is generated to act on a rock stratum and a coal bed, the acting force exceeds the fracture stress of the rock stratum and the coal bed through the quick pressure rise, a plurality of radial cracks which can not be healed are formed, and the aim of increasing the yield of the rock coal is fulfilled
The rock coal pre-cracking agent reduces the harm of shock waves generated after the existing explosive is exploded to a human body, and improves the coal mining recovery rate. At present, the explosive blasting technology is adopted, the coal recovery rate is only 70% at most, the coal recovery rate of the rock coal pre-cracking agent can reach more than 80%, and the rock coal pre-cracking agent does not have the phenomena of isobaric death such as ammonium nitrate fuel oil explosives and emulsion explosives, so that the occurrence rate of misfires is reduced.
The rock coal pre-cracking agent is essentially different from a propellant for a solid rocket, the propellant for the rocket requires higher specific impulse, the pressure index is not more than 0.5, and the solid rocket engine can stably work conveniently; it is known that the higher the burning rate, the greater the risk. The existing solid propellant has a burning speed of over 60mm/s (7MPa) and both the friction sensitivity and the impact sensitivity are close to 100 percent. The invention improves the burning rate of the rock coal pre-cracking agent by improving the pressure index, not only can greatly improve the burning rate, but also can keep better safety performance. The existing propellant is difficult to realize high burning rate (the burning rate of 7MPa is more than 60mm/s) and simultaneously keep better safety.
The rock coal pre-cracking agent has no detonator sensitivity, cannot be detonated by a detonator, and can be ignited only by an igniter. The danger grade of the rock coal pre-cracking agent is 1.3 grade; the burning temperature of the pre-cracking agent is 2800K-3200K, the burning rate of the pre-cracking agent at 3MPa is more than 100mm/s, the burning rate at 5MPa is more than 200mm/s, and the burning rate pressure index at 1 MPa-10 MPa is not less than 1.5; the time for the P-t curve of a 100ml closed exploder test of the presplitting agent to reach the peak pressure is not more than 20ms, and the amount of the test agent is not more than 8 g.
Compared with the prior art, the invention has the following advantages:
1) the burning temperature of the rock coal pre-cracking agent is between 2800K and 3200K, and the actual specific volume is more than 600L/kg; the specific volume test standard is implemented according to GJB737.9 gas specific volume determination of test method for initiating explosive devices and medicaments.
2) The burning rate and the pressure index of the rock coal pre-cracking agent are high, the actual measurement burning rate of 3MPa is more than 100mm/s, the actual measurement burning rate of 5MPa is more than 200mm/s, and the burning rate pressure index of 1 MPa-10 MPa is not lower than 1.5; test method GJB770b method 706.1 burning rate target line method.
3) The rock coal pre-cracking agent has good safety performance, the friction sensitivity and the impact sensitivity are not more than 20%, and the electrostatic spark sensitivity is more than 120 mJ; the 5s delay period explosion point is more than 300 ℃. The test conditions for the friction sensitivity were 3.92MPa, 90 DEG, and the test conditions for the impact sensitivity were 10kg, 50 cm.
4) The rock coal pre-cracking agent danger grade of the invention belongs to grade 1.3.
5) The rock coal pre-cracking agent can be ignited by civil firer equipment such as an electric ignition head, an electric igniter and the like, and only burns without detonation under normal temperature and normal pressure, and only under a closed condition, the combustion is changed into the detonation.
6) The preparation method of the rock coal pre-cracking agent does not comprise the processes of granulation, tabletting and the like, has no dust in the production process, short production period and low production cost, and can realize continuous large-scale production.
Drawings
These and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a P-t curve of a rock coal pre-cracking agent obtained in an embodiment of the invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following detailed description of the invention is provided in conjunction with the accompanying drawings and the detailed description of the invention.
Example 1
The rock coal pre-cracking agent comprises the following components in percentage by mass:
adhesive: 1.5% of HTPB;
plasticizer: 1.0% of dioctyl sebacate;
fuel: guanidine nitrate, 11%;
fuel: c, 8% of powder;
fuel: DAP, 14% wherein M is K+；
Combustion speed regulator: 0.5 percent, wherein the content of the ferric oxide accounts for 0.2 percent of the total mass of the formula;
oxidizing agent: KP, 64%; wherein the content of the class I KP accounts for 30 percent of the total mass of the KP, and the content of the class II KP accounts for 55 percent of the total mass of the KP; the content of the III KP accounts for 15 percent of the total mass of the KP;
the preparation method comprises the following steps:
(1) weighing the selected formula, adding the adhesive HTPB, the dioctyl sebacate, the speed regulation regulator and the fuel DAP into an acoustic resonance mixer to mix at a mixing speed of 20g (gravity acceleration); mixing for 7 min; the mixing temperature is 30-40 ℃;
(2) adding the rest of the fuel into an acoustic resonance mixer for mixing, wherein the mixing speed is 40 g; mixing for 7 min;
(2) adding 1/2KP into an acoustic resonance mixer, and mixing at the mixing speed of 40 g; mixing for 7 min;
(3) adding 1/2KP into an acoustic resonance mixer, and mixing at a mixing speed of 45 g; mixing for 8 min;
(4) discharging to obtain the rock coal pre-cracking agent.
The burning rate of the obtained rock coal pre-cracking agent at 3MPa is 108.5mm/s, the burning rate at 5MPa is 212mm/s, the pressure index of 1-10 MPa is 1.5, the burning temperature is 3094.32K, and the specific volume is 635.5L/kg; the friction sensitivity is 16%, the impact sensitivity is 12%, the 5s delay period explosion point is 310.2 ℃, and the danger level is 1.3. FIG. 1 is a P-t curve of the obtained rock coal pre-cracking agent
Example 2
The rock coal pre-cracking agent comprises the following components in percentage by mass:
adhesive: 1.5% of HTPB;
1.5 percent of plasticizer diisooctyl sebacate;
fuel: 8% of guanidine nitrate;
fuel: c, 6% of powder;
fuel: DAP, 12% where M is NH4 +；
Combustion speed regulator: 1.0 percent, wherein the content of the ferric oxide accounts for 0.5 percent of the total amount of the formula;
oxidizing agent: KP, 70%; wherein, the content of the class I KP accounts for 20 percent of the total mass of the KP, and the content of the class II KP accounts for 70 percent of the total mass of the KP; the content of the III KP accounts for 10 percent of the total mass of the KP;
the preparation method comprises the following steps:
(1) weighing the selected formula, adding the adhesive HTPB, the dioctyl sebacate, the speed regulation regulator and the fuel DAP into an acoustic resonance mixer to mix at a mixing speed of 20g (gravity acceleration); mixing for 7 min; the mixing temperature is 30-40 ℃;
(2) adding the rest of the fuel into an acoustic resonance mixer for mixing, wherein the mixing speed is 40 g; mixing for 7 min;
(2) adding 1/2KP into an acoustic resonance mixer, and mixing at the mixing speed of 40 g; mixing for 7 min;
(3) adding 1/2KP into an acoustic resonance mixer, and mixing at a mixing speed of 45 g; mixing for 8 min;
(4) discharging to obtain the rock coal pre-cracking agent.
The burning rate of the obtained rock coal pre-cracking agent at 3MPa is 125.7mm/s, the burning rate at 5MPa is 235.3mm/s, and the pressure index between 1MPa and 10MPa is 1.8. The combustion temperature of 5MPa is 3037.63K, and the specific volume is 610.5L/kg;
the friction sensitivity is 8 percent, the impact sensitivity is 8 percent, the 5s delay period explosion point is 305.4 ℃, and the danger level is 1.3.
Example 3
The rock coal pre-cracking agent comprises the following components in percentage by mass:
adhesive: 1.5% of CTPB;
1.5 percent of plasticizer diisooctyl sebacate;
fuel: guanidine nitrate, 11%;
fuel: c, 8% of powder;
fuel: DAP, 16% where M is NH4 +；
Combustion speed regulator: 1.0 percent, wherein the content of the ferric oxide accounts for 0.4 percent of the total amount of the formula;
oxidizing agent: KP, 61%; wherein the content of the class I KP accounts for 25% of the total mass of the KP, and the content of the class II KP accounts for 65% of the total mass of the KP; the content of the III KP accounts for 10 percent of the total mass of the KP;
the preparation method comprises the following steps:
(1) weighing the selected formula, adding the adhesive CTPB, diisooctyl sebacate, a speed regulation regulator and the fuel DAP into an acoustic resonance mixer to mix at a mixing speed of 20g (gravity acceleration); mixing for 5 min; the mixing temperature is 30-40 ℃;
(2) adding the rest of the fuel into an acoustic resonance mixer for mixing, wherein the mixing speed is 40 g; mixing for 6 min;
(2) adding 1/2KP into an acoustic resonance mixer, and mixing at the mixing speed of 40 g; mixing for 4 min;
(3) adding 1/2KP into an acoustic resonance mixer, and mixing at a mixing speed of 45 g; mixing for 5 min;
(4) discharging to obtain the pre-cracking agent.
The burning rate of the obtained rock coal pre-cracking agent at 3MPa is 115.7mm/s, the burning rate at 5MPa is 222.3mm/s, and the pressure index between 1MPa and 10MPa is 1.6. The fuel temperature is 3086.75K, and the specific volume is 651.3L/kg; the friction sensitivity is 8 percent, the impact sensitivity is 8 percent, the 5s delay period explosion point is 305.4 ℃, and the danger level is 1.3.
Example 4
The rock coal pre-cracking agent comprises the following components in percentage by mass:
adhesive: 1.0% of liquid phenolic resin;
plasticizer: 1.0% of glyceryl triacetate;
fuel: guanidine nitrate, 10%;
fuel: powder C, 7%;
fuel: DAP, 13% wherein M is Na+；
Combustion speed regulator: 1.0 percent, wherein the content of the ferric oxide accounts for 0.3 percent of the total amount of the formula;
oxidizing agent: KP, 67%; wherein the content of the class I KP accounts for 15 percent of the total mass of the KP, and the content of the class II KP accounts for 80 percent of the total mass of the KP; the content of the III KP is 5 percent of the total mass of the KP;
the preparation method comprises the following steps:
(1) weighing the selected formula, adding the adhesive phenolic resin, the glyceryl triacetate, the speed-regulating agent and the DAP into an acoustic resonance mixer, and mixing at a mixing speed of 20g (gravity acceleration); mixing for 5 min; the mixing temperature is 30-40 ℃;
(2) adding the rest of the fuel into an acoustic resonance mixer for mixing, wherein the mixing speed is 40 g; mixing for 5 min;
(2) adding 1/2KP into an acoustic resonance mixer, and mixing at the mixing speed of 40 g; mixing for 5 min;
(3) adding 1/2KP into an acoustic resonance mixer, and mixing at a mixing speed of 45 g; mixing for 5 min;
(4) discharging to obtain the pre-cracking agent.
The burning rate of the obtained rock coal pre-cracking agent at 3MPa is 103.8mm/s, the burning rate at 5MPa is 212.7mm/s, and the pressure index between 1MPa and 10MPa is 1.6. The fuel temperature is 3039.22K, and the specific volume is 641.2L/kg;
the friction sensitivity is 4%, the impact sensitivity is 4%, the 5s delay period explosion point is 308.7 ℃, and the danger level is 1.3.
Example 5
The rock coal pre-cracking agent comprises the following components in percentage by mass:
adhesive: CTPB, 2.0%;
plasticizer: glyceryl triacetate, 2.0%;
fuel: guanidine nitrate, 10%;
fuel: c, 8% of powder;
fuel: DAP, 14% wherein M is NH4 +；
Combustion speed regulator: 1.0 percent, wherein the content of the ferric oxide accounts for 0.6 percent of the total amount of the formula;
oxidizing agent: KP, 63%; wherein, the content of the class I KP accounts for 20 percent of the total mass of the KP, and the content of the class II KP accounts for 80 percent of the total mass of the KP;
the preparation method comprises the following steps:
(1) weighing the selected formula, adding the adhesive phenolic resin, the glyceryl triacetate, the speed-regulating agent and the DAP into an acoustic resonance mixer, and mixing at a mixing speed of 20g (gravity acceleration); mixing for 5 min; the mixing temperature is 30-40 ℃;
(2) adding the rest of the fuel into an acoustic resonance mixer for mixing, wherein the mixing speed is 40 g; mixing for 5 min;
(2) adding 1/2KP into an acoustic resonance mixer, and mixing at the mixing speed of 40 g; mixing for 5 min;
(3) adding 1/2KP into an acoustic resonance mixer, and mixing at a mixing speed of 45 g; mixing for 5 min;
(4) discharging to obtain the pre-cracking agent.
The burning rate of the obtained rock coal pre-cracking agent at 3MPa is 112.9mm/s, the burning rate at 5MPa is 216.5mm/s, and the pressure index between 1MPa and 10MPa is 1.65. The fuel temperature is 3047.73K, and the specific volume is 650.3L/kg;
the friction sensitivity is 4%, the impact sensitivity is 4%, the 5s delay period explosion point is 305.6 ℃, and the danger level is 1.3.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (5)
1. The rock coal pre-cracking agent is characterized by comprising the following components in percentage by mass:
adhesive: 1.0% -2.5%;
plasticizer: 1.0% -2.5%;
oxidizing agent: 60% -72%;
fuel: 25 to 35 percent;
combustion speed regulator: 0.5 to 2.0 percent;
the fuel is guanidine nitrate, carbon powder and organic-inorganic hybrid molecular perovskite type high-energy substance (H)2dabco)2+[M+(ClO4 -)3]The composition of (1); said (H)2dabco)2+[M+(ClO4 -)3]Abbreviated DAP, wherein H2dabco is triethylenediamine, M+Is Na+、K+、Ru+、NH4 +One of (1);
the particle size range of the guanidine nitrate is d being more than or equal to 60 mu m50Less than or equal to 100 mu m, and the content of the fuel does not exceed 1/3 of the total fuel by mass fraction;
the particle size range of the carbon powder is d50Less than or equal to 10 mu m, and the content of the fuel does not exceed 1/4 of the total fuel by mass fraction;
the particle size range of the DAP is not less than 40 d50Less than or equal to 120 mu m, and has the function of improving the burning rate and burning rate pressure index of the rock coal pre-cracking agent;
the adhesive is one or a combination of more of hydroxyl-terminated polybutadiene, carboxyl-terminated polybutadiene and liquid phenolic resin; the plasticizer is one or more of dioctyl sebacate, diisooctyl sebacate and glyceryl triacetate;
the danger grade of the rock coal pre-cracking agent is 1.3 grade; the burning rate of the rock coal pre-cracking agent at 3MPa is more than 100mm/s, the burning rate at 5MPa is more than 200mm/s, and the burning rate pressure index of 1-10 MPa is not less than 1.5; the time for the P-t curve of a 100ml closed exploder test of the rock coal pre-cracking agent to reach the peak pressure is not more than 20ms, and the amount of the test agent is not more than 8 g.
2. The rock coal pre-cracking agent of claim 1, wherein: the oxidant is potassium perchlorate.
3. The rock coal pre-cracking agent of claim 1, wherein: the potassium perchlorate is classified into I, II and III; wherein the particle size d of the class I potassium perchlorate5010 to 30 mu m, the content of the potassium perchlorate is 15 to 35 percent of the total mass of the potassium perchlorate, and the granularity d of the II type potassium perchlorate5040-80 μm, the content of the potassium perchlorate is 45-85 percent of the total mass of the potassium perchlorate, and the granularity d of the III class potassium perchlorate50100-150 μm, and the content is 0-15% of the total weight of the potassium perchlorate.
4. The rock coal pre-cracking agent of claim 1, wherein: the fuelThe quick regulator is a composition of ferric oxide and ferrocene; its particle size range d50≤5μm。
5. The process for preparing a rock coal pre-cracking agent according to any one of claims 1 to 4, characterized in that it comprises the following steps:
(1) weighing the substances according to the formula, adding the adhesive, the plasticizer, the combustion speed regulator and the fuel DAP into a vertical mixer, and mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(2) adding fuel carbon powder and guanidine nitrate into a vertical mixer for mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(3) adding half of the oxidant by weight into a vertical mixer for mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(4) adding the other half of the oxidant into a vertical mixer for mixing at the rotating speed of 60-80 r/min for 4-8 min; the mixing temperature is 30-40 ℃;
(5) discharging to obtain the rock coal pre-cracking agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911226787.2A CN110981660B (en) | 2019-12-04 | 2019-12-04 | Rock coal pre-cracking agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911226787.2A CN110981660B (en) | 2019-12-04 | 2019-12-04 | Rock coal pre-cracking agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110981660A CN110981660A (en) | 2020-04-10 |
| CN110981660B true CN110981660B (en) | 2021-12-10 |
Family
ID=70089940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911226787.2A Active CN110981660B (en) | 2019-12-04 | 2019-12-04 | Rock coal pre-cracking agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110981660B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114539011B (en) * | 2022-02-21 | 2023-03-28 | 张延松 | Safe and efficient high-energy expanding agent and preparation method and application thereof |
| CN115160093B (en) * | 2022-07-05 | 2023-04-21 | 湖北航天化学技术研究所 | Pouring type self-repairing simulated explosive and preparation method thereof |
| CN115947641A (en) * | 2022-12-29 | 2023-04-11 | 西安石油大油气科技有限公司 | Preparation method of gunpowder propellant for deflagration fracturing of low-permeability oil field small casing |
| CN116924864A (en) * | 2023-07-19 | 2023-10-24 | 核工业北京化工冶金研究院 | Propellant and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526687A (en) * | 2003-09-22 | 2004-09-08 | 中国北方化学工业总公司 | Smokeless gun propellant for fireworks and its prepn |
| CN100999429A (en) * | 2007-01-09 | 2007-07-18 | 浏阳市庆典烟花有限公司 | Glowing ray flash star for fireworks and its making method |
| US8986473B1 (en) * | 2008-09-03 | 2015-03-24 | The United States Of America As Represented By The Secretary Of The Navy | High burning rate tactical solid rocket propellant, and related method |
| CN108752151A (en) * | 2018-06-19 | 2018-11-06 | 湖北航天化学技术研究所 | Safety-type civilian propellant of one kind and preparation method thereof |
| CN109485680A (en) * | 2018-12-07 | 2019-03-19 | 陕西师范大学 | Benzoates burningrate catalyst containing ferrocene group and preparation method thereof |
| CN109896913A (en) * | 2019-04-24 | 2019-06-18 | 湖北航天化学技术研究所 | A kind of novel point gunpowder and preparation method thereof |
-
2019
- 2019-12-04 CN CN201911226787.2A patent/CN110981660B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526687A (en) * | 2003-09-22 | 2004-09-08 | 中国北方化学工业总公司 | Smokeless gun propellant for fireworks and its prepn |
| CN100999429A (en) * | 2007-01-09 | 2007-07-18 | 浏阳市庆典烟花有限公司 | Glowing ray flash star for fireworks and its making method |
| US8986473B1 (en) * | 2008-09-03 | 2015-03-24 | The United States Of America As Represented By The Secretary Of The Navy | High burning rate tactical solid rocket propellant, and related method |
| CN108752151A (en) * | 2018-06-19 | 2018-11-06 | 湖北航天化学技术研究所 | Safety-type civilian propellant of one kind and preparation method thereof |
| CN109485680A (en) * | 2018-12-07 | 2019-03-19 | 陕西师范大学 | Benzoates burningrate catalyst containing ferrocene group and preparation method thereof |
| CN109896913A (en) * | 2019-04-24 | 2019-06-18 | 湖北航天化学技术研究所 | A kind of novel point gunpowder and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110981660A (en) | 2020-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110981660B (en) | Rock coal pre-cracking agent and preparation method thereof | |
| CN101952542A (en) | System and method for enhanced wellbore perforations | |
| CN113383206A (en) | Blasting method using jet unit charged in blast hole | |
| WO2011057564A1 (en) | Combined fracturing and perforating method and device for oil and gas well | |
| CN106187647B (en) | Aftereffect body granular preparation for oil and gas well perforation | |
| CN108955404A (en) | A kind of perforating oil gas well pressure break super powder charge and preparation method | |
| CN114539011B (en) | Safe and efficient high-energy expanding agent and preparation method and application thereof | |
| US9689246B2 (en) | Stimulation devices, initiation systems for stimulation devices and related methods | |
| CN106478324B (en) | Carbon dioxide gas blaster exothermic mixture | |
| CN201007199Y (en) | Bundling perforator | |
| CN210862407U (en) | Allowable electronic detonator for coal mine | |
| CN204082108U (en) | Double-deck shell case petroleum perforation charge | |
| Zygmunt et al. | Application and properties of aluminum in primary and secondary explosives | |
| CN106631645B (en) | Carbon dioxide phase transformation fracturing exothermic mixture | |
| CN114956915A (en) | Gas generating agent of double-base propellant for fractured rock pipe and preparation method thereof | |
| US20130284441A1 (en) | Downhole severing tool | |
| CN107356166A (en) | A kind of blasting method for firing medium and medium being fired using this for restricted clearance explosion | |
| CN210664166U (en) | Electronic ignition delay detonator | |
| RU2590803C1 (en) | Explosive charge of regular weapons and ammunition of primary purpose | |
| CN201225863Y (en) | Tool for detonating step hole | |
| CN102305058B (en) | Novel synergistic shattering perforation series charging device | |
| CN102927863A (en) | New method for blasting construction of all-rock tunnel | |
| Singh et al. | Study and performance of low density emulsion explosive | |
| RU2190585C1 (en) | Explosive composition for boreholes | |
| CN202348247U (en) | Quadric-detonation composite perforating charge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |