A method of charging suitable for field mixed explosive

Abstract

The application provides a charging method suitable for on-site mixed explosive, and the charging method suitable for on-site mixed explosive comprises the following steps: step one, a hole opening process of a blast hole; step two, a pre-embedding process of a charging pipe; step three, a layout process of a medicine delivery pipe; step four, a charging process; step five, a foaming process of emulsified explosive; and step six, a layout process of a fuse, in which the fuse is arranged by being connected. The charging method of the mixed explosive is composed of the hole opening process of the blast hole, the pre-embedding process of the charging pipe, the layout process of the medicine delivery pipe, the charging process, the foaming process of the emulsified explosive and the layout process of the fuse. The method can match the withdrawal speed of the pipe and the charging speed, improves the automation level of the on-site mixed explosive vehicle for underground mines, and effectively reduces the labor intensity.

Description

Technical Field

[0001] This invention relates to the technical field of explosive loading, specifically a loading method suitable for on-site mixing of explosives. Background Technology

[0002] Emulsion explosives are a type of water-in-oil emulsion explosive that uses an emulsifier to uniformly disperse droplets of an oxidizing agent salt solution in a continuous oil-phase medium containing porous materials such as dispersed air bubbles or hollow glass microspheres. Developed in the 1970s, emulsion explosives have advantages such as high density, high detonation velocity, high saturation, good water resistance, small critical diameter, and good initiation sensitivity. Therefore, emulsion explosives have been widely used in various industries both domestically and internationally.

[0003] Emulsion explosives are usually loaded using on-site mixed explosives trucks. Compared with using pre-made explosives, on-site mixed explosives trucks have advantages such as high work efficiency and good blasting effect. However, there are certain defects in the current setting of the emulsion explosives burying process, which leads to low burying efficiency of emulsion explosives. Summary of the Invention

[0004] The purpose of this invention is to provide a charging method suitable for on-site mixing of explosives, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a charging method suitable for on-site mixed explosives, the charging method comprising the following steps:

[0006] Step 1: The process of drilling blast holes. During the drilling process, drilling equipment is used to drill holes at the location to be blasted.

[0007] Step 2: Pre-embedding process of the propellant tube. In the pre-embedding process of the propellant tube, the propellant tube is positioned and installed in the blast hole.

[0008] Step 3: The process of arranging the drug delivery tube. In the process of arranging the drug delivery tube, the drug delivery tube is extended along the inner side wall edge of the drug loading tube to the bottom of the drug loading tube. The drug delivery tube is composed of pipe one and pipe two.

[0009] Step 4: Loading process. During the loading process, the explosive latex matrix is ​​transported to the loading pipe through pipe one of the delivery pipe, and at the same time, the emulsion explosive sensitizing base liquid is transported to the loading pipe through pipe two of the delivery pipe.

[0010] Step 5: Foaming process of emulsion explosive. In the foaming process of emulsion explosive, the explosive latex matrix and the emulsion explosive sensitizing base liquid are mixed in the delivery tube, and then the mixture is allowed to stand in the charging tube for 20-30 minutes to foam and form emulsion explosive.

[0011] Step Six: The process of arranging the detonators, which involves connecting and arranging the explosive detonators.

[0012] Preferably, a pressure sensor is installed at the end of the delivery pipe. The pressure sensor is used to monitor the hydraulic pressure in the borehole, so as to detect the delivery flow rate of the delivery pipe and the liquid level in the borehole.

[0013] Preferably, during the drug loading process, the drug delivery tube is simultaneously retracted while delivering the drug, and the retraction speed of the drug delivery tube is determined based on the drug flow rate in the drug delivery tube.

[0014] Preferably, the explosive latex matrix is ​​prepared by mixing an oil phase and an aqueous phase in a ratio of 2:8.

[0015] Preferably, the oil phase is composed of 60-85% paraffinic neutral oil and 15-40% emulsifier, wherein the paraffinic neutral oil is composed of 150N base oil, 150SN base oil, 70N base oil and 15# white oil.

[0016] Preferably, the weight ratio of the 70N base oil, 150N base oil, 150SN base oil, and 15# white oil is: 70N base oil 30-45%;

[0017] 150N base oil 22-37%;

[0018] 150SN base oil 14-26%;

[0019] 15# white oil 21-33%.

[0020] Preferably, the composite emulsifier is composed of an oleic acid emulsifier and modified silica particles. The oleic acid emulsifier is prepared by mixing sorbitan monooleate and triethanolamine oleate in a ratio of 7:13. The hydrophobically modified silica particles are prepared by mixing dimethyldichlorosilane modified silica particles and polydimethylsiloxane modified silica particles in a ratio of 4:23. The ratio between the oleic acid emulsifier and the modified silica particles is 17:5.

[0021] Preferably, the aqueous phase is prepared by mixing ammonium nitrate and water in a ratio of 19:11.

[0022] Preferably, during the loading process, the emulsion explosive sensitizing base solution is composed of water and an organic solvent, wherein the organic solvent is prepared by mixing ethanol, ethylene glycol and glycerol in a ratio of 2:5:3.

[0023] Preferably, the ratio of water to organic solvent is 2:7, and the organic solvent is prepared by mixing and stirring in a mixing tank, and the stirring conditions are low speed stirring at room temperature for 5 to 10 minutes, and then water is added and stirring is continued for 3 to 5 minutes.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a method for loading mixed explosives, which is composed of the process of opening the borehole, the process of pre-embedding the charging tube, the process of arranging the delivery tube, the charging process, the foaming process of the emulsion explosive, and the arrangement process of the lead wire. This method can achieve the matching of the tube retraction speed and the charging speed, improve the automation level of the on-site mixed explosive loading vehicle in underground mines, and thus effectively reduce the intensity of manual labor. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides a technical solution: a loading method for on-site mixed explosives includes the following steps:

[0027] Step 1: The process of drilling blast holes. During the drilling process, drilling equipment is used to drill holes at the location to be blasted.

[0028] Step 2: Pre-embedding process of the propellant charging tube. During the pre-embedding process of the propellant charging tube, the propellant charging tube is positioned and installed in the blast hole.

[0029] Step 3: The process of arranging the drug delivery pipe. During the arrangement of the drug delivery pipe, the drug delivery pipe is extended along the inner wall edge of the drug loading pipe to the bottom of the drug loading pipe. The drug delivery pipe is composed of pipe one and pipe two.

[0030] Step 4: Loading process. During the loading process, the explosive latex matrix is ​​transported to the loading tube through pipe 1 of the delivery pipe, and at the same time, the emulsion explosive sensitizing base liquid is transported to the loading tube through pipe 2 of the delivery pipe.

[0031] Step 5: Foaming process of emulsion explosive. In the foaming process of emulsion explosive, the explosive latex matrix and the emulsion explosive sensitizing base liquid are mixed in the delivery tube, and then the mixture is allowed to stand in the charging tube for 20-30 minutes to foam and form emulsion explosive.

[0032] Step Six: The process of arranging the detonators involves connecting and arranging the explosive detonators.

[0033] A pressure sensor is installed at the end of the delivery tube. The pressure sensor is used to monitor the hydraulic pressure in the borehole, so as to detect the delivery flow rate of the delivery tube and the liquid level in the borehole.

[0034] During the loading process, the delivery tube is simultaneously delivering the drug and retracting. The retraction speed of the delivery tube is determined based on the drug flow rate within the delivery tube.

[0035] The explosive latex matrix is ​​made by mixing an oil phase and an aqueous phase in a ratio of 2:8.

[0036] The oil phase consists of 60-85% paraffinic neutral oil and 15-40% emulsifier. The paraffinic neutral oil is composed of 150N base oil, 150SN base oil, 70N base oil and 15# white oil.

[0037] The weight ratio of 70N base oil, 150N base oil, 150SN base oil, and 15# white oil is: 70N base oil 30-45%;

[0038] 150N base oil 22-37%;

[0039] 150SN base oil 14-26%;

[0040] 15# white oil 21-33%.

[0041] The composite emulsifier consists of an oleic acid emulsifier and modified silica particles. The oleic acid emulsifier is made by mixing sorbitan monooleate and triethanolamine oleate in a ratio of 7:13. The hydrophobically modified silica particles are made by mixing dimethyldichlorosilane modified silica particles and polydimethylsiloxane modified silica particles in a ratio of 4:23. The ratio between the oleic acid emulsifier and the modified silica particles is 17:5.

[0042] The aqueous phase is prepared by mixing ammonium nitrate and water in a ratio of 19:11. The compound oil selected in this invention has a much lower kinematic viscosity than traditional oil phase materials. Because of the lower kinematic viscosity, the shear strength requirement for the emulsifier is lower, achieving low-power emulsification, making emulsification easier and resulting in better emulsification. Furthermore, the low kinematic viscosity makes it easy to disperse and suitable for redispersing and mixing in static mixers, which is beneficial for improving the sensitization effect of the latex matrix. This allows for sensitization during the loading process of the on-site mixed emulsion explosives, and the loading pressure is lower, typically below 1 MPa, generally between 0.6 and 0.7 MPa. Compared to the traditional on-site mixed emulsion explosives loading pressure of 1.2 MPa, the risk factor is lower, thus greatly improving the overall safety of the mixed explosives during the loading process.

[0043] During the loading process, the emulsion explosive sensitizing base solution is composed of water and an organic solvent. The organic solvent is prepared by mixing ethanol, ethylene glycol, and glycerol in a ratio of 2:5:3. The ratio of water to organic solvent is 2:7. The organic solvent is prepared by mixing and stirring in a mixing tank under the following conditions: low-speed stirring at room temperature for 5-10 minutes, followed by the addition of water and stirring for another 3-5 minutes. The emulsion explosive sensitizing base solution prepared in this way can overcome the disadvantages of high-temperature chemical sensitization process products, such as short shelf life, poor stability, and aftereffects. At the same time, this invention can also improve the overall compressive strength of emulsion explosive products.

[0044] This invention provides a method for loading mixed explosives, which consists of a combination of the borehole opening process, the pre-embedding process of the charging pipe, the arrangement process of the delivery pipe, the charging process, the foaming process of the emulsion explosive, and the arrangement process of the lead wire. This method can achieve the matching of the pipe retraction speed and the charging speed, improve the automation level of the on-site mixed explosive loading vehicle in underground mines, and thus effectively reduce the intensity of manual labor.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for loading explosives for on-site mixing, characterized in that, The charging method applicable to on-site mixed explosives includes the following steps: Step 1: The process of drilling blast holes. During the drilling process, drilling equipment is used to drill holes at the location to be blasted. Step 2: Pre-embedding process of the propellant tube. In the pre-embedding process of the propellant tube, the propellant tube is positioned and installed in the blast hole. Step 3: The process of arranging the drug delivery tube. In the process of arranging the drug delivery tube, the drug delivery tube is extended along the inner side wall edge of the drug loading tube to the bottom of the drug loading tube. The drug delivery tube is composed of pipe one and pipe two. Step 4: Loading process. During the loading process, the explosive latex matrix is ​​transported to the loading pipe through pipe one of the delivery pipe, and at the same time, the emulsion explosive sensitizing base liquid is transported to the loading pipe through pipe two of the delivery pipe. The explosive latex matrix is ​​made by mixing an oil phase and an aqueous phase in a ratio of 2:8; The oil phase is composed of 60-85% paraffinic neutral oil and 15-40% emulsifier, wherein the paraffinic neutral oil is composed of 150N base oil, 150SN base oil, 70N base oil and 15# white oil. The weight ratio of the 70N base oil, 150N base oil, 150SN base oil, and 15# white oil is as follows: 70N base oil 30-45%; 150N base oil 22-37%; 150SN base oil 14-26%; 15# white oil 21-33%. The emulsifier is composed of an oleic acid emulsifier and modified silica particles. The oleic acid emulsifier is prepared by mixing sorbitan monooleate and triethanolamine oleate in a ratio of 7:

13. The modified silica particles are prepared by mixing dimethyldichlorosilane modified silica particles and polydimethylsiloxane modified silica particles in a ratio of 4:

23. The ratio between the oleic acid emulsifier and the modified silica particles is 17:

5. Step 5: Foaming process of emulsion explosive. In the foaming process of emulsion explosive, the explosive latex matrix and the emulsion explosive sensitizing base liquid are mixed in the delivery tube, and then the mixture is allowed to stand in the charging tube for 20-30 minutes to foam and form emulsion explosive. Step Six: The process of arranging the detonators, which involves connecting and arranging the explosive detonators.

2. The method for loading explosives for on-site mixing according to claim 1, characterized in that: A pressure sensor is installed at the end of the delivery pipe. The pressure sensor is used to monitor the hydraulic pressure in the borehole, so as to detect the delivery flow rate of the delivery pipe and the liquid level in the borehole.

3. A method for loading explosives for on-site mixing according to claim 2, characterized in that: During the loading process, the delivery tube is simultaneously retracted while delivering the drug, and the retraction speed of the delivery tube is determined based on the drug flow rate within the delivery tube.

4. The method for loading explosives for on-site mixing according to claim 1, characterized in that: The aqueous phase is prepared by mixing ammonium nitrate and water in a ratio of 19:

11.

5. A method for loading explosives for on-site mixing according to claim 1, characterized in that: During the loading process, the emulsion explosive sensitizing base liquid is composed of water and an organic solvent. The organic solvent is made by mixing ethanol, ethylene glycol and glycerol in a ratio of 2:5:

3.

6. A method for loading explosives for on-site mixing according to claim 5, characterized in that: The ratio of water to organic solvent is 2:7, and the organic solvent is prepared by mixing and stirring in a mixing tank. The stirring conditions are low speed stirring at room temperature for 5 to 10 minutes, and then water is added and stirring is continued for 3 to 5 minutes.