阅读说明：本技术 一种新型防静电和防自燃自爆的硫化矿区乳化***装药方法 (Novel anti-static and anti-spontaneous-combustion self-explosion emulsion explosive loading method for sulfide ore area ) 是由 吴杜娟 吴建星 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种新型防静电和防自燃自爆的硫化矿区乳化炸药装药方法,包括：钻孔和装药装置放置、装药装置和钻孔环空填充、炸药和填充物放置及起爆；本发明的有益效果在于,首先,本发明的乳化炸药装药方法从物理隔离角度使用耐热胶,柔性材料防止炸药直接作用与岩石的交界面,在热量辐射传导的过程中抑制能量的快速扩散,减少热量对硫化矿本身的影响；其次,本发明的乳化炸药装药方法选用纯棉布匹作为装药装置和钻孔之间的填充材料,选用的内包装、外包装及涂覆外包装的耐热胶三种材料不但可以减缓热量的扩散,还能减少静电的积聚,防止硫化矿自燃。(The invention discloses a novel method for charging an emulsion explosive in a sulfide mine area, which is capable of preventing static electricity and spontaneous combustion, and comprises the following steps: placing a drilling hole and a charging device, filling the charging device and the drilling hole annulus, placing explosive and filler and detonating; the method for filling the emulsion explosive has the beneficial effects that firstly, the heat-resistant glue is used from the physical isolation angle, the flexible material prevents the explosive from directly acting on the interface of the rock, the rapid diffusion of energy is inhibited in the heat radiation conduction process, and the influence of heat on the sulfide ore is reduced; and secondly, the emulsion explosive charging method selects the pure cotton cloth as the filling material between the explosive charging device and the drill hole, and the selected three materials of the inner package, the outer package and the heat-resistant glue coated on the outer package can slow down the diffusion of heat, reduce the accumulation of static electricity and prevent the spontaneous combustion of sulfide ores.)

1. A novel anti-static and anti-spontaneous-combustion self-explosion emulsion explosive loading method for a sulfide ore area is characterized by comprising the following steps:

step 1, drilling by using a drilling machine, and then putting a mixed charging device (2) which is preset according to the diameter of a blast hole into the drilled hole (1);

step 2, filling an annular space between the explosive charging device and the drill hole with flexible materials such as heat-resistant glue and pure cotton cloth, and preventing heat generated by explosive reaction from being directly transmitted to the rock;

and 3, sequentially filling explosives (3) and fillers (4) into the explosive loading device (2) from bottom to top, connecting a detonator by using a detonating tube and a detonating cord, and detonating after covering a blast hole baffle (5) at the upper end of the explosive loading device (2).

2. The novel method for charging the emulsion explosive in the sulfide ore area for preventing static electricity and spontaneous combustion from exploding is characterized by comprising the following steps of: the charging device (2) of step 1 is axially placed in the borehole (1).

3. The novel method for charging the emulsion explosive in the sulfide ore area for preventing static electricity and spontaneous combustion from exploding is characterized by comprising the following steps of: and the filler (4) in the step 3 is composed of heat-resistant glue and pure cotton cloth.

4. The novel method for charging the emulsion explosive in the sulfide ore area for preventing static electricity and spontaneous combustion from exploding is characterized by comprising the following steps of: the height of the filler (4) is less than that of the explosive (3).

5. The novel method for charging the emulsion explosive in the sulfide ore area for preventing static electricity and spontaneous combustion from exploding is characterized by comprising the following steps of: the height of the filler (4) is equal to 1/4 of the height of the explosive (3).

Technical Field

The invention belongs to the technical field of preventing and treating spontaneous combustion and spontaneous explosion of sulphide ores, relates to the improvement of an emulsion explosive charging process and a charging device in a high-sulphide ore area, and particularly relates to a novel anti-static and spontaneous combustion and spontaneous explosion-proof emulsion explosive charging process in a sulphide ore area.

Background

The ore sulfur basically exists in the form of pyrite and chalcopyrite, and research shows that direct contact between the sulfide ore and the ammonium nitrate explosive can generate chemical reaction to cause spontaneous combustion explosion according to a spontaneous combustion and spontaneous explosion mechanism of the sulfide ore explosive. Explosives also undergo thermal decomposition reactions at high temperatures. The time for placing the blast hole is too long, water exists in the blast hole, so that the hole wall is in a wet state, the oxidation condition of the pyrite is met, the reaction releases heat, the oxidation process is accelerated, the pyrite is fully oxidized, and the generated sulfuric acid causes the pH of the water in the hole to be reduced and to be acidic. The explosive is filled into a blast hole, sulfuric acid and ammonium nitrate react to generate nitric acid, the nitric acid and pyrite react to generate nitrogen dioxide, heat is released, the temperature is raised, the explosive reacts circularly, and the explosive is self-ignited.

In order to prevent the explosive from spontaneous combustion in the sulfide mining area, the spontaneous combustion phenomenon can be isolated or slowed down by other physical methods. The emulsion explosive mixed loading vehicle is researched and put into use in China in the beginning of the 20 th century and the 80 th era, and is successively applied to large-scale domestic open mines such as Dexing copper mine, plain-plastic coal mine and the like, the emulsion explosive mixed loading vehicle technology is an advanced blasting technology integrating raw material transportation, on-site mixing of explosives and mechanized loading, and the emulsion explosive mixed loading vehicle has the remarkable advantages of high safety production efficiency, low drilling cost, convenience in use and the like; however, in the actual application to the mine blasting process, the loading structure is coupled loading, and the problems of large loading quantity per linear meter, overlong blocking length, high unit consumption of explosive and the like often occur. It should be particularly noted that the ignition point of the sulfide ore is very low, static electricity is easy to accumulate due to the use of the material of the charging device component, early explosion accidents are easy to occur, if the packaging material is made of common plastic material, the sulfide ore can be caused to self-ignite in the blasting engineering, meanwhile, the conduction process of the heat generated by the explosive combination reaction in the sulfide ore is also the key point of the control technology research, the heat generated by the emulsion explosive combination reaction is conducted in the ore in a radiation mode, and the conduction process and the range have great influence on the change of the property and the state of the sulfide ore.

Therefore, a novel emulsion explosive charging process for preventing static electricity and spontaneous combustion is needed, a physical isolation method is adopted, and the safety problem of spontaneous combustion and spontaneous combustion of the sulfide explosive is solved from the aspect of intrinsic safety.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to solve the technical problems that after drilling, the sulfide ore directly generates a spontaneous combustion phenomenon, the ignition point of the sulfide ore is very low, static electricity is easy to accumulate due to the use of the material of the charging device component, the spontaneous combustion and spontaneous explosion of the sulfide ore are caused, and the emulsion explosive generates a great deal of heat after reaction, and the energy directly acts on the rock in a radiation mode and is conducted in the ore, and the conduction process and range have great influence on the change of the property and the state of the sulfide ore.

2. Technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a novel method for charging an emulsion explosive in a sulfide ore area for preventing static electricity and spontaneous combustion from exploding comprises the following steps:

step 1, a drilling machine punches holes, and then a mixed charging device which is preset according to the diameter of a blast hole is placed in the drilled holes;

step 2, filling an annular space between the explosive charging device and the drill hole with flexible materials such as heat-resistant glue and pure cotton cloth, and preventing heat generated by explosive reaction from being directly transmitted to the rock;

and 3, sequentially filling explosives and fillers into the explosive charging device from bottom to top, connecting a detonator by using a detonating tube and a detonating cord, and detonating after covering a blast hole baffle on the upper end of the explosive charging device.

Preferably, the charge of step 1 is placed axially in the borehole.

Preferably, the filler of step 3 is composed of heat-resistant glue and pure cotton cloth.

Preferably, the fill height is less than the explosive height.

Preferably, the fill height is equal to 1/4, the explosive height.

It is preferable that the first and second liquid crystal layers are formed of,

3. advantageous effects

In conclusion, the beneficial effects of the invention are as follows:

(1) according to the emulsion explosive charging method, the heat-resistant glue is used from the physical isolation angle, the flexible material prevents the explosive from directly acting on the interface of the rock, the rapid diffusion of energy is inhibited in the heat radiation conduction process, and the influence of heat on the sulfide ore is reduced;

(2) the emulsion explosive charging method selects the pure cotton cloth as the filling material between the explosive charging device and the drill hole, and the selected three materials of the inner package, the outer package and the heat-resistant glue coated on the outer package can slow down the diffusion of heat, reduce the accumulation of static electricity and prevent the spontaneous combustion of sulfide ores.

Drawings

FIG. 1 is a schematic diagram of the explosive structure of the novel method for charging the emulsion explosive in the sulfide ore area for preventing static electricity and spontaneous combustion from exploding.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to the attached figure 1, the novel method for charging the emulsion explosive in the sulfide ore area for preventing static electricity and spontaneous combustion from exploding comprises the following steps:

step 1, drilling holes by using a drilling machine, and then putting a mixed charging device 2 which is preset according to the diameter of a blast hole into the drilled holes 1;

step 2, filling an annular space between the explosive charging device and the drill hole with flexible materials such as heat-resistant glue and pure cotton cloth, and preventing heat generated by explosive reaction from being directly transmitted to the rock;

and 3, sequentially filling explosives 3 and fillers 4 into the explosive charging device 2 from bottom to top, connecting a detonator by using a detonating tube and a detonating cord, and detonating after covering a blast hole baffle 5 at the upper end of the explosive charging device 2.

Preferably, the charge 2 of step 1 is placed axially in the borehole 1.

Preferably, the filler 4 of step 3 is composed of heat-resistant glue and pure cotton cloth.

Preferably, the height of the charge 4 is less than the height of the explosive 3.

Preferably, the height of the filler 4 is equal to 1/4 of the height of the explosive 3.

The invention adopts heat-resistant glue and pure cotton cloth as the filling material between the explosive charging device 2 and the drill hole 1, so that the explosive does not directly contact with the rock, the interval in the period plays a great role in inhibiting the conduction of heat generated by the emulsion explosive, the temperature conducted to sulfide ore will be increased along with the reduction of the interval width of the two, and meanwhile, the used flexible material cannot generate the imagination of electrostatic accumulation, therefore, the novel emulsion explosive charging process for preventing static electricity and spontaneous combustion and spontaneous explosion in the sulfide ore area can well overcome the problems in the background technology, and has important engineering significance and theoretical value for preventing the spontaneous combustion and spontaneous explosion of the sulfide ore.

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