Organic rock fracturing material, preparation method thereof and rock fracturing method

Abstract

The invention belongs to the technical field of mining, and particularly relates to an organic rock fracturing material, a preparation method thereof and a rock fracturing method. The organic rock cracking material comprises the following raw material components in parts by weight: 40-50 parts of sodium chlorate, 30-40 parts of white granulated sugar, 5-10 parts of biological wheat middling, 5-10 parts of wheat bran and 5-10 parts of carbon powder, the total weight part of the raw materials is 100. The organic rock fracturing material provided by the invention is efficient, safe, environment-friendly and economical, and can be accurately matched with the mechanical properties of different rocks, so that the fracturing effect and efficiency are greatly improved, and finally the technical targets of low cost, low risk and high controllability are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of rock mining, and in particular relates to an organic rock fracturing material and a preparation method thereof and a rock fracturing method. Background Art

[0002] Rock fracturing or mining technology is a series of technical means used to mine ore from underground deposits or process rocks to obtain resources, open up space, etc. At present, rock fracturing or mining technology mainly covers three major systems: blasting technology, fracturing technology and fracturing technology: Blasting technology: As a traditional and mainstream mining technology, its principle is to use dynamite or other explosives to explode in the mine to break the rock and complete the mining. However, this technology has significant safety risks and is not suitable for areas close to the safety zone.

[0003] Fracturing technology: This technology injects high-pressure liquid or gas into the rock mass to cause cracks in the ore body and destroy its mechanical properties. It is a newly developed technology in the recent period. However, it has many shortcomings, such as small single rock fracture volume, only applicable to shallow rock fracture, difficult to form large-scale mining, low construction efficiency and high overall cost.

[0004] Fracturing technology: This technology uses hydraulic impact to destroy the mechanical properties of the rock mass, or uses high-temperature and high-pressure gas or liquid to heat or pressurize the ore body, so that the mechanical properties of the rock mass change and cracks are generated. However, this technology requires large investment in equipment and is limited in many aspects such as equipment, construction technology and construction specifications.

[0005] The existing rock fracturing or mining technologies mentioned above have defects to varying degrees in terms of safety, efficiency, environmental protection of raw materials, cost and scope of application. Therefore, a more advanced, environmentally friendly, safe and efficient rock fracturing method is urgently needed.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide an organic rock fracturing material, a preparation method thereof and a rock fracturing method; the organic rock fracturing material is efficient, safe, and environmentally friendly, and can accurately match the mechanical properties of different rocks, greatly improving the fracturing effect and efficiency, and ultimately achieving the technical goals of low cost, low risk, and high controllability.

[0008] In order to achieve the above object, the present invention provides the following technical solutions: An organic rock fracturing material comprises the following raw material components in parts by weight: 40-50 parts of sodium chlorate, 30-40 parts of white granulated sugar, 5-10 parts of biological waste flour, 5-10 parts of wheat bran and 5-10 parts of carbon powder; the total weight of the raw materials is 100.

[0009] Furthermore, the rock is any one of carbonate rock, granite or coal seam.

[0010] Furthermore, when the rock is carbonate rock, it is composed of the following raw material components by weight: 45 parts of sodium chlorate, 35 parts of white sugar, 10 parts of biological waste flour, 5 parts of wheat bran and 5 parts of carbon powder; And / or, when the rock is granite, the raw material components are composed of the following by weight: 50 parts of sodium chlorate, 35 parts of white sugar, 5 parts of biological waste flour, 5 parts of wheat bran and 5 parts of carbon powder; And / or, when the rock is a coal seam, it is composed of the following raw material components by weight: 40 parts of sodium chlorate, 30 parts of white sugar, 10 parts of biological waste flour, 10 parts of wheat bran and 10 parts of carbon powder.

[0011] Furthermore, the sodium chlorate is selected from industrial grade sodium chlorate with a purity of ≥80%; and / or, the bio-secondary meal is corn bio-secondary meal or wheat bio-secondary meal, and the moisture content of the bio-secondary meal is ≤8%; and / or, the carbon powder is charcoal or activated carbon, and the specific surface area of ​​the carbon powder is ≥800m² / g.

[0012] In addition, the present invention also provides a method for preparing the organic rock fracturing material as described above, comprising the following steps: S1, raw material pretreatment; S2. Sodium chlorate, white sugar, biological waste flour, wheat bran and carbon powder are sequentially put into a mixing device, mixed under certain mixing conditions, and a pulsed magnetic field is applied at the same time to obtain the organic rock fracturing material.

[0013] Furthermore, in step S1, sodium chlorate is crushed to a particle size of ≤100 μm by a crusher and then dried to a humidity of ≤0.05%; and / or white sugar is crushed and passed through an 80-mesh sieve; and / or biological secondary flour and wheat bran are sterilized at a high temperature of 120°C for 30 minutes and then crushed to a particle size of ≤200 μm; and / or carbon powder is ground to a particle size of ≤50 μm.

[0014] Further, in step S2, the mixing device is selected from a twin-screw mixer or a rotating roller mixer; the rotation speed of the twin-screw mixer is 20-50 rpm; the inclination angle of the rotating roller mixer is 15°, and the rotation speed is 10-30 rpm; And / or, the mixing conditions are: mixing time 30-60 min; mixing temperature 50-80° C.; And / or, the applied intensity of the pulsed magnetic field is 480~1600kA / m.

[0015] In addition, the present invention also provides a rock fracturing method, which uses the above-mentioned organic rock fracturing material or the organic rock fracturing material prepared by the above-mentioned preparation method, and comprises the following steps: Step 1: Preparation before construction: Analyze the lithology through geological radar or drilling sampling, calculate the consumption of the organic rock fracturing material for different lithologies, and set corresponding drilling parameters; Step 2, drilling and charging: drilling is performed according to the set drilling parameters. After the drilling is completed, the organic rock fracturing material is loaded into the borehole, and then the hole is sealed with clay or quick-setting cement, and the electronic match fuse interface is reserved after compaction; Step 3, circuit connection and excitation: a series circuit is used to connect the electronic matches of each borehole, one end of the shielded cable is connected to the electronic match circuit that has been connected in series, and the other end is connected to the remote control terminal; then the controllable seismic source device is started, and the voltage is gradually increased to a set range to trigger plasma, and the generated plasma is used to ignite the organic rock fracturing material, and the organic rock fracturing material generates expansion force after chemical reaction to cause rock fracture.

[0016] Further, in step 1, the consumption of the organic rock fracturing material is 0.33-0.42 kg / m³; And / or, in step 1, the drilling parameters include hole diameter, hole depth, row spacing and spacing; when the rock is carbonate rock, the hole diameter is 90-120 mm, the hole depth is 5-18 mm, the row spacing is 4-5 m, and the spacing is 4-5 m; when the rock is granite, the hole diameter is 90-120 mm, the hole depth is 5-15 mm, the row spacing is 3-4 m, and the spacing is 3-4 m; when the rock is a coal seam, the hole diameter is 80-120 mm, the hole depth is 5-20 mm, the row spacing is 5-7 m, and the spacing is 5-7 m; And / or, in step 2, the plugging depth of clay or quick-setting cement is: when the rock is carbonate rock, the plugging depth is 2 to 6 m; when the rock is granite, the plugging depth is 2 to 5 m; when the rock is a coal seam, the plugging depth is 2 to 6 m.

[0017] Furthermore, in step three, the withstand voltage of the shielded cable is ≥1000V; and / or, after gradually increasing the voltage to 500-800V, plasma is triggered; and / or, the chemical reaction time of the organic rock fracturing material is controlled within 0.1-0.5 seconds.

[0018] Compared with the prior art, the technical solution of the present invention has at least the following technical effects: (1) The organic rock fracturing material provided by the present invention is different from traditional fracturing materials. It innovatively combines a variety of bio-organic raw materials (bio-depleted flour, fine wheat bran, etc.) with chemical raw materials (sodium chlorate, etc.). Bio-organic raw materials are widely available, low-cost and environmentally friendly. This unique formulation design not only ensures the fracturing performance, but also significantly improves the environmental friendliness of the material, opening up a new direction for raw material selection in the field of rock fracturing. In addition, the organic rock fracturing material of the present invention is efficient, safe, environmentally friendly, and economical, and can accurately match the mechanical properties of different rocks, greatly improving the fracturing effect and efficiency, and ultimately achieving the technical goals of low cost, low risk, and high controllability.

[0019] (2) The preparation method of the present invention achieves efficient, safe and environmentally friendly production of rock cracking agents through precise raw material pretreatment, pulsed magnetic field and specific mixing conditions. Its innovation lies in combining physical excitation with chemical formula, breaking through the technical bottleneck of traditional blasting material preparation, and providing reliable guarantee for large-scale application; the production equipment is simple, and the whole process is pollution-free and has no by-products. Compared with traditional production processes, it not only reduces production costs, but also meets environmental protection requirements, providing a better choice for large-scale industrial production.

[0020] (3) The rock fracturing method of the present invention adopts an excitation method of a fully serially connected controllable seismic source device. This excitation method is safe and reliable, technically controllable, and can be remotely operated. It can effectively avoid the safety hazards of traditional blasting technology, while also improving construction efficiency and expanding the application scope of rock fracturing technology in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them: Figure 1 A circuit diagram of the rock fracturing method of the present invention; Figure 2 This is a field test diagram of the rock fracturing method of the present invention applied to a mine in Jiangxi; Figure 3 This is a field test diagram of the rock fracturing method of the present invention applied to a mine in Hubei; Figure 4 This is a field test diagram of the rock fracturing method of the present invention applied to a mine in Xinjiang. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention. The process parameters of the following embodiments that do not specify specific conditions are usually based on conventional conditions.

[0023] The endpoints and any values ​​of the ranges disclosed in the present invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in the present invention.

[0024] According to a first aspect of the present invention, an organic rock fracturing material is provided, comprising the following raw material components in parts by weight: 40-50 parts (for example, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50 parts) of sodium chlorate, 30-40 parts (for example, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 parts) of white sugar, 5-10 parts (for example, 5, 6, 7, 8, 9, 10 parts) of biological secondary powder, 5-10 parts (for example, 5, 6, 7, 8, 9, 10 parts) of wheat bran and 5-10 parts (for example, 5, 6, 7, 8, 9, 10 parts) of carbon powder; the total number of parts by weight of the raw materials is 100.

[0025] The weight parts described in the present invention mainly include the disclosed numerical range, any numerical value (including integers and decimals) or any interval between two numerical values ​​in the disclosed range, or multiple discontinuous intervals, and also include numerical values ​​or numerical ranges close to the end values ​​of the numerical range whose effects can be expected to be similar, such as 5-10 parts, not only including 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts and any interval between two parts, but also other numerical ranges, which are not given one by one, are all included in the present invention. Therefore, the present invention also includes the sub-range of any numerical range that has been directly disclosed or any specific numerical value therein.

[0026] The organic rock-fracture material of the present invention is applied to the synergistic mechanism of chemical reactions between the components in the rock-fracture process, wherein the synergistic mechanism includes energy transfer synergy, reaction promotion synergy and product influence synergy, and involves the application of the following chemical reactions: Sodium chlorate decomposes under high temperature or acidic conditions to produce the reaction of sodium chlorate and oxygen: ; Sodium chlorate and carbon undergo a redox reaction at high temperature to produce sodium chlorate and carbon dioxide: ; Sodium chlorate reacts with sucrose in the presence of an acid catalyst to produce sodium chlorate, carbon dioxide and water: ; The organic matter in biological waste flour and refined wheat bran (taking cellulose () as an example) undergoes oxidation reaction with sodium chlorate to produce sodium chlorate, carbon dioxide and water: ; The reaction of sucrose and carbon in the presence of sodium chlorate to produce sodium chlorate, carbon dioxide and water: ; The organic matter in the bio-flour and refined wheat bran (cellulose, for example) reacts with carbon under the action of sodium chlorate to produce sodium chlorate, carbon dioxide and water: .

[0027] The organic rock-cracking material of the present invention achieves an efficient and controllable rock-cracking effect through the synergistic effect of multiple chemical reactions under excitation conditions. The reactions of each component promote and complement each other. The specific mechanism is as follows: (1) Synergistic release of energy and gas: Sodium chlorate decomposition reaction ( ) is the key to start the system: Oxygen supply: The released oxygen provides sufficient oxidant for the oxidation reaction of carbon, sucrose and cellulose, avoiding incomplete combustion (such as carbon monoxide generation) and ensuring efficient reaction.

[0028] Heat accumulation: The decomposition reaction releases heat, rapidly raising the system temperature, providing energy for subsequent reactions that require high temperature conditions (such as the reaction between carbon and sodium chlorate), forming a self-sustaining reaction chain.

[0029] The violent reaction of sucrose and sodium chlorate ( ): Explosive release of gas: large amounts of CO are generated 2 Gas forms a high-pressure environment in a short period of time, driving the material to expand rapidly.

[0030] Heat superposition: The intense heat release further accelerates the decomposition of sodium chlorate and other oxidation reactions, forming a positive feedback loop.

[0031] (2) Functional complementarity between organic and inorganic substances: The expansion enhancement effect of biological secondary flour and wheat bran: Cellulose in biomass powder ) decomposes into glucose at high temperature , which reacts with sodium chlorate to produce CO 2 ,( ), supplement the gas release amount.

[0032] The high water absorption of wheat bran forms a microporous structure during the mixing process, which enhances the gas diffusion efficiency and makes the expansion force act evenly on the rock.

[0033] Combustion-supporting and catalytic effects of carbon powder: Carbon (C) reacts with sodium chlorate ( ) provides additional CO 2 , while carbon acts as a catalyst to accelerate the oxidation rate of sucrose and cellulose.

[0034] (3) Global control of plasma excitation: Precise energy input: Plasma is stimulated by external voltage, providing a high-energy environment instantly, triggering multiple reactions such as sodium chlorate decomposition, sucrose oxidation and carbon combustion, avoiding the ignition delay of traditional explosives.

[0035] Reaction controllability: The plasma energy is adjustable. By controlling the voltage and magnetic field strength (480-1600kA / m), the reaction rate and gas release amount can be precisely controlled to achieve on-demand distribution of the fracture force.

[0036] (4) Synergistic optimization of products and environment: Harmless products: All reactions ultimately generate NaCl and CO 2 and H 2 O, no toxic residue (such as NOx, SOx), in line with environmental protection requirements.

[0037] Stability of NaCl: As the final product, NaCl does not participate in secondary reactions, avoiding chemical contamination of rocks or groundwater.

[0038] (5) Dynamic balance between formulation ratio and rock mass adaptation: Sodium chlorate ratio (40-50 parts): ensures sufficient oxidant to drive the main reaction to proceed completely, while avoiding excessive amount that may cause the reaction to run away.

[0039] The ratio of sucrose to carbon powder (30~40 parts: 5~10 parts): balances the functions of reducing agent and combustion aid, and optimizes the gas release rate and heat distribution.

[0040] Bio-secondary flour and wheat bran (5-10 parts: 5-10 parts): adjust the ratio according to the hardness of the rock (e.g. carbonate rock requires higher expansion force) to enhance the adaptability of the microporous structure.

[0041] (6) Product influence synergy: There is also a synergistic effect between the products produced by each reaction. For example, a large amount of carbon dioxide gas produced by all reactions gathers in a short period of time to form a strong expansion pressure, which is the direct driving force for rock fracturing. At the same time, substances such as sodium chlorate generated by the reaction play a role in stabilizing the reaction system to a certain extent, preventing the reaction from being too intense and out of control. In addition, the oxidation reaction products of biological waste flour and fine wheat bran, such as some small molecular organic and inorganic substances, may interact with other reaction products, further enhancing the stability and reaction effect of the entire reaction system, and jointly promoting rock fracturing.

[0042] (7) Test data verification Jiangxi mine test: unit material consumption is 0.33kg / m³, indicating that the synergistic effect significantly improves gas utilization efficiency.

[0043] Xinjiang granite test: The low consumption of 0.39kg / m³ verifies the adaptability of the formula to different rock masses, and the reaction synergy is not weakened by the difference in rock properties.

[0044] Summary: The synergistic mechanism of the present invention achieves high efficiency, safety and environmental protection of rock fracturing through four dimensions: energy chain transfer, functional component complementation, precise control of excitation conditions and generation of environmentally friendly products. Each reaction is not carried out in isolation, but is closely coupled through oxygen supply, heat accumulation, gas release and other links to form an amplification effect of "1+1>2", ultimately achieving the technical goal of low cost, low risk and high controllability.

[0045] Regarding the formula research: Under the condition of only considering the chemical process (1), under the ideal state of sodium chlorate and white sugar, the molar ratio is 2:1, and the mass ratio is 3.38:1. In the experiment, the rock fracturing effect of this ratio is poor, because the ratio is not enough to fully burn and quickly expand the biological waste powder, wheat bran and carbon powder.

[0046] In order to find the best formula ratio, during the experiment, by gradually increasing the proportion of sodium chlorate, it was found that the rock fracturing effect gradually increased. In the process of repeated experiments, the best ratio achieved the best effect within a certain range. The range is: sodium chlorate: white sugar: biological second powder: wheat bran: carbon powder = (40-50): (35-40): (5-10): (5-10): (5-10).

[0047] On this basis, considering that the mechanical properties of different rocks are different, their component ratios are also different. At present, the following rocks are mainly studied for formulation, because the mechanical properties of most rocks can refer to the following formulations, and the following conclusions are drawn: Carbonate rock: sodium chlorate: white sugar: biological waste powder: wheat bran: carbon powder is 45:35:10:5:5 Granite: sodium chlorate: white sugar: biological powder: wheat bran: carbon powder is 50:35:5:5:5 Coal seam: sodium chlorate: white sugar: biological waste powder: wheat bran: carbon powder is 40:30:10:10:10.

[0048] Through identification, the material formed by this patent is "explosive and a pyrotechnic agent". Other different rock masses can refer to rock masses with similar properties for fracturing or mining.

[0049] In the above-mentioned organic rock fracturing materials, as a preferred embodiment, sodium chlorate is selected from industrial grade sodium chlorate with a purity of ≥99%; the bio-secondary powder is corn bio-secondary powder or wheat bio-secondary powder; the moisture content of the bio-secondary powder is ≤8%; the carbon powder is charcoal or activated carbon, and the specific surface area of ​​the carbon powder is ≥800m² / g.

[0050] According to a second aspect of the present invention, a method for preparing the above-mentioned organic rock fracturing material is provided, and the specific process is as follows: (1) Raw material pretreatment Sodium chlorate: Industrial grade sodium chlorate (purity ≥80%) is crushed by a pulverizer to a particle size of ≤100μm and dried (humidity ≤0.5%).

[0051] Granulated sugar: Food grade sucrose, crushed through an 80-mesh sieve to ensure uniform particles.

[0052] Biological waste flour and wheat bran: agricultural by-products, after high temperature sterilization (120℃, 30min), crushed to particle size ≤200μm and moisture content ≤8%.

[0053] Carbon powder: Charcoal or activated carbon ground to a particle size of ≤50μm and a specific surface area of ​​≥800m² / g.

[0054] (2) Mixing process Equipment: Use a twin-screw mixer (speed 20~50rpm) or a rotary drum mixer (inclination angle 15°, speed 10~30rpm).

[0055] Feeding order: Add sodium chlorate, white sugar, biodegradable flour, wheat bran and carbon powder in sequence according to the formula ratio, and feed in batches to avoid local overheating.

[0056] Mixing parameters: ① Mixing time: 30~60min; ② Temperature control: 50~80℃ (adjusted by jacket circulating water system); ③ Magnetic field assistance: apply a pulsed magnetic field of 480~1600kA / m to enhance particle dispersibility.

[0057] Packaging method: ① Bulk: vacuum packaging in moisture-proof aluminum foil bags, 10kg per bag; ② Tube packaging: PE tube (50mm in diameter, 300mm in length) is filled and heat-sealed at both ends, with a single tube loading of 1.5kg.

[0058] Storage conditions: ① Temperature: 15-25°C; ② Humidity: ≤30%RH; ③ Avoid light, fire and strong oxidants.

[0059] Transportation requirements: Transport according to non-explosive dangerous goods (UN3077) standards and avoid severe vibration.

[0060] The performance test of the prepared organic rock fracturing material is carried out as follows: (1) Core equipment: start-up controllable source device (the start-up controllable source device used in the present invention is the "waveform controllable source" in the applicant's prior patent application No. 202410096270.0 and the invention name "A waveform controllable source and geological body advance detection device, method and system") (output frequency 1~5kHz, pulse width 10-100μs); High-pressure reactor (volume 500L, pressure resistance 10MPa, material 316L stainless steel).

[0061] Environmental protection design: ① Waste gas treatment: reaction tail gas (CO 2 , O 2 ) is discharged after purification in an alkali liquid absorption tower; ② Dust collection: The closed feeding port is equipped with a cyclone dust collector, and the dust recovery rate is ≥95%.

[0062] Reactivity test: ① Simulation excitation test: take 100g sample and measure the gas release amount (≥200L / kg) under standard conditions (500V voltage, 5MPa pressure); ② Expansion rate detection: record the material expansion process through a high-speed camera, the expansion ratio is ≥10 times.

[0063] Uniformity detection: ① Laser particle size analyzer detects the particle size distribution of the mixed material (D50≤150μm); ② X-ray fluorescence spectroscopy (XRF) verifies that the molar ratio error of sodium chlorate and reducing agent is ≤3%.

[0064] According to the third aspect of the present invention, a rock fracturing method is provided, which uses the above-mentioned organic rock fracturing material or the organic rock fracturing material prepared by the above-mentioned preparation method. The organic rock fracturing material of the present invention needs to be standardized in combination with rock mass characteristics, construction environment and safety regulations in mine application. The specific implementation steps are as follows: (1) Preparation before construction Rock mass assessment: ① Analyze rock properties (such as hardness and degree of fracture development) through geological radar or borehole sampling; ② Select the appropriate formula according to the rock properties (see Table 1) and calculate the charge amount (unit consumption 0.33~0.42kg / m³), single hole charge amount = drilling area × (hole depth - plugging depth) × rock cracking agent density.

[0065] Parameter design: Refer to Table 1 to determine the drilling parameters (hole diameter, hole depth, row spacing, spacing); Table 1

[0066] Equipment inspection: ① Verify the start-up functions of the controllable vibrator device (output voltage 500-1000V), electronic matches and remote control system; ② Ensure that the drilling machine, sealing materials (clay or cement mortar) and protective equipment (dust mask, goggles) are complete.

[0067] (2) Drilling and charging Drilling construction: ① Drill holes according to design parameters and remove gravel and dust in the holes; ② Use segmented plugging (plugging depth 2-6m) for multi-fracture rock masses to prevent energy leakage.

[0068] Charging process: ① Bulk materials: inject rock cracking agent into the borehole through a pneumatic delivery pump, with a filling density of ≥1.2g / cm³; ② Tube materials: insert the PE pipe into the bottom of the hole and fix it with a mechanical jacking device to ensure that the pipe body fits the hole wall.

[0069] Sealing treatment: Use clay or quick-setting cement to seal the hole, and reserve the fuse interface for the electronic match after compaction.

[0070] (3) Circuit connection and excitation Circuit layout: ① Use a series circuit to connect the electronic matches in each hole (such as Figure 1 As shown, the starter is the starter of the controllable vibrator device), ensuring that the current is evenly distributed; ② Use a shielded cable (withstand voltage ≥ 1000V) to connect to the remote control terminal.

[0071] Plasma excitation: ① Start the controllable seismic source device and gradually increase the voltage to 500-800V to trigger the plasma; ② The plasma ignites the rock cracking agent through an electronic match, and the reaction time is controlled at 0.1-0.5 seconds.

[0072] Remote control: ① Monitor the excitation state through the remote control system (the remote control system used in the present invention is the “Waveform Controllable Vibrator and Geological Body Advance Detection System” in the applicant’s prior patent application number 202410096270.0 and invention name “A Waveform Controllable Vibrator and Geological Body Advance Detection Device, Method and System”) and adjust the voltage and pulse frequency in real time; ② Support single-hole excitation or group excitation (each group ≤ 10 holes) to meet the needs of complex terrain.

[0073] (4) Safety monitoring and post-processing Construction monitoring: ① Vibration sensors monitor the ground vibration velocity (≤2cm / s, lower than the national standard limit); ② Gas detectors confirm that there is no leakage of harmful gases such as CO and NOx.

[0074] Residue treatment: ① Rinse the incompletely reacted rock cracking agent (such as ineffective due to moisture) with clean water and collect the NaCl residue (which can be recycled); ② Clean up the gravel on site and transport it to the designated area in accordance with environmental protection requirements.

[0075] Data recording: record the rock fracture volume, material consumption and rock fragmentation (block size ≤300mm and proportion ≥80% are qualified).

[0076] Advantages summary: ① Safety: No explosives are used, vibration and flying rock risks are controllable, and it complies with the "Safety Regulations for Blasting" (GB6722-2014); ② High efficiency: A single excitation can treat 2000-3000m³ of rock mass, and the construction efficiency is 40% higher than that of traditional blasting; ③ Adaptability: Through dynamic adjustment of formula and parameters, it is suitable for complex geological conditions (aquifers, multi-fractured rock mass); ④ Environmental protection: There is no harmful residue on site after construction, and NaCl can be recycled for road snow melting or industrial raw materials.

[0077] Mine experiment Field tests were conducted in actual mines in Jiangxi, Hubei and Xinjiang, and the results are as follows: ① Jiangxi mine (such as Figure 2 shown): Carbonate rock, material 1000kg, through on-site calculation, the rock fracture volume is 2964m 3 , density is 2.71g / cm 3 The unit material consumption is 0.33 kg / m 3 .

[0078] ② Hubei mine (such as Figure 3 shown): Carbonate rock, material 1200kg, through on-site calculation, the rock fracture volume is 2865m 3 , density is 2.71g / cm 3The unit material consumption is 0.42kg / m 3 .

[0079] ③ Xinjiang mines (such as Figure 4 shown): Granite, material 960kg, through on-site calculation, the rock fracture volume is 2468m 3 The density is 2.70g / cm3, which is 6664 tons, and the unit material consumption is 0.39kg / m 3 .

[0080] Through field experiments, it is concluded that the comprehensive effect of the rock fracturing method of the present invention is significant: Safety: No explosives are used, no flying stones and low vibration during construction, which complies with the requirements of the "Regulations on the Safety Management of Civil Explosives"; Economical: The production cost is 30% lower than that of traditional explosives and is suitable for complex environments; Environmental protection: zero harmful gas emissions.

[0081] The above describes and evaluates the efficacy of some embodiments of the present invention. It should be understood that the present invention is not limited to the above specific implementations. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still falls within the scope of protection of the technical solutions of the present invention.

Claims

1. An organic rock fracturing material, characterized in that: The raw material components are as follows, measured in parts by weight: 40-50 parts of sodium chlorate, 30-40 parts of white granulated sugar, 5-10 parts of biological waste flour, 5-10 parts of wheat bran and 5-10 parts of carbon powder; the total weight of the raw materials is 100.

2. The organic rock fracturing material according to claim 1, characterized in that: The rock is any one of carbonate rock, granite or coal seam.

3. The organic rock fracturing material according to claim 2, characterized in that: When the rock is carbonate rock, it is composed of the following raw material components by weight: 45 parts of sodium chlorate, 35 parts of white sugar, 10 parts of biological waste flour, 5 parts of wheat bran and 5 parts of carbon powder; And / or, when the rock is granite, the raw material components are composed of the following by weight: 50 parts of sodium chlorate, 35 parts of white sugar, 5 parts of biological waste flour, 5 parts of wheat bran and 5 parts of carbon powder; And / or, when the rock is a coal seam, it is composed of the following raw material components by weight: 40 parts of sodium chlorate, 30 parts of white sugar, 10 parts of biological waste flour, 10 parts of wheat bran and 10 parts of carbon powder.

4. The organic rock fracturing material according to claim 1, characterized in that: The sodium chlorate is selected from industrial grade sodium chlorate with a purity of ≥80%; and / or, the bio-secondary powder is corn bio-secondary powder or wheat bio-secondary powder, and the moisture content of the bio-secondary powder is ≤8%; and / or, the carbon powder is charcoal or activated carbon, and the specific surface area of ​​the carbon powder is ≥800m² / g.

5. A method for preparing an organic rock fracturing material according to any one of claims 1 to 4, characterized in that: The steps include: S1, raw material pretreatment; S2. Sodium chlorate, white sugar, biological waste flour, wheat bran and carbon powder are sequentially put into a mixing device, mixed under certain mixing conditions, and a pulsed magnetic field is applied at the same time to obtain the organic rock fracturing material.

6. The preparation method according to claim 5, characterized in that: In step S1, the sodium chlorate is crushed to a particle size of ≤100 μm by a crusher, and then dried to a humidity of ≤0.05%; and / or, white sugar is crushed and passed through an 80-mesh sieve; and / or, biological secondary flour and wheat bran are sterilized at a high temperature of 120° C. for 30 minutes, and then crushed to a particle size of ≤200 μm; And / or, grinding the carbon powder to a particle size of ≤50 μm.

7. The preparation method according to claim 5, characterized in that: In step S2, the mixing device is selected from a twin-screw mixer or a rotating roller mixer; the rotation speed of the twin-screw mixer is 20-50 rpm; the inclination angle of the rotating roller mixer is 15° and the rotation speed is 10-30 rpm; And / or, the mixing conditions are: mixing time 30-60 min; mixing temperature 50-80° C.; And / or, the applied intensity of the pulsed magnetic field is 480~1600kA / m.

8. A rock fracturing method, characterized in that: The method comprises the following steps: using the organic rock-cracking material according to any one of claims 1 to 4 or the organic rock-cracking material prepared by the preparation method according to any one of claims 5 to 7: Step 1: Preparation before construction: Analyze the lithology through geological radar or drilling sampling, calculate the consumption of the organic rock fracturing material for different lithologies, and set corresponding drilling parameters; Step 2, drilling and charging: drilling is performed according to the set drilling parameters. After the drilling is completed, the organic rock fracturing material is loaded into the borehole, and then the hole is sealed with clay or quick-setting cement, and the electronic match fuse interface is reserved after compaction; Step 3, circuit connection and excitation: a series circuit is used to connect the electronic matches of each borehole, one end of the shielded cable is connected to the electronic match circuit that has been connected in series, and the other end is connected to the remote control terminal; then the controllable seismic source device is started, and the voltage is gradually increased to a set range to trigger plasma, and the generated plasma is used to ignite the organic rock fracturing material, and the organic rock fracturing material generates expansion force after chemical reaction to cause rock fracture.

9. The rock fracturing method according to claim 8, characterized in that: In step 1, the consumption of the organic rock fracturing material is 0.33-0.42 kg / m³; And / or, in step 1, the drilling parameters include hole diameter, hole depth, row spacing and spacing; when the rock is carbonate rock, the hole diameter is 90-120 mm, the hole depth is 5-18 mm, the row spacing is 4-5 m, and the spacing is 4-5 m; when the rock is granite, the hole diameter is 90-120 mm, the hole depth is 5-15 mm, the row spacing is 3-4 m, and the spacing is 3-4 m; when the rock is a coal seam, the hole diameter is 80-120 mm, the hole depth is 5-20 mm, the row spacing is 5-7 m, and the spacing is 5-7 m; And / or, in step 2, the plugging depth of clay or quick-setting cement is: when the rock is carbonate rock, the plugging depth is 2 to 6 m; when the rock is granite, the plugging depth is 2 to 5 m; when the rock is a coal seam, the plugging depth is 2 to 6 m.

10. The rock fracturing method according to claim 8, characterized in that: In step three, the withstand voltage of the shielded cable is ≥1000V; and / or, the voltage is gradually increased to 500-800V to trigger plasma; and / or, the chemical reaction time of the organic rock fracturing material is controlled within 0.1-0.5 seconds.

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