Device for measuring variable density in mixed explosive hole

Abstract

The utility model relates to a device for measuring variable density in a mixed explosive hole. The device comprises a measuring cylinder and a sealing cover plate, wherein the top of the measuring cylinder is open; the sealing cover plate detachably covers the top of the measuring cylinder; the inner diameter of the measuring cylinder is set to be equal to the diameter of an on-site blast hole; two mounting holes are formed in the sealing cover plate, and a first reserved pipe and a second reserved pipe are mounted in the two mounting holes correspondingly; the first reserved pipe and the second reserved pipe are respectively provided with an air valve and a constant pressure valve, and the constant pressure valve is provided with a barometer for measuring the air pressure in the measuring cylinder; the device further comprises an air pump, and the air pump is connected with the first reserved pipe through an air pipe. Compared with the prior art, the method has the advantages that the final sensitization density of the mixed explosive at different depths in the blast hole can be measured, variable-density construction of the mixed explosive on site is facilitated, the blasting excavation effect is improved, and the construction cost is effectively controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to mixed loading explosive blasting technical field, concretely relates to a device for mixed loading explosive hole variable density measurement. BACKGROUND

[0002] Under the background of rapid economic development, the demand for energy is also showing an increasingly expanding trend. As a traditional energy resource, mine exploitation is tending to be efficient and intelligent. With the proposal and practice of the two-mountain theory, green utilization of resources has gradually become the main show of mine exploitation. Mixed loading explosive has gradually become the mainstream in domestic mine blasting exploitation due to its on-site configuration and efficient energy utilization. How to fully utilize the adjustable density characteristics of mixed loading explosive to realize differentiated configuration with different rock properties has become an important application research to solve the problem of how to realize efficient and high-quality development in current mine blasting.

[0003] Unlike traditional industrial packaged explosives, mixed loading explosives are in a flowing state in the blast hole due to their on-site mixed loading and sensitization characteristics, and their density changes under the dual action of gravity and sensitization deformation. As one of the important explosive parameters in blasting design, the accuracy of density measurement is of great significance to improve the blasting excavation effect and effectively control the construction cost. In the prior art, the mixed loading explosive density in the mine blast hole is mainly measured by measuring the final sensitization height of the mixed loading explosive with a measuring rope and the like, and then calculating the final sensitization volume of the mixed loading explosive. The density of the mixed loading explosive is calculated by the ratio of mass to volume. In the prior art, only the total final sensitization height of the mixed loading explosive can be measured, so the measured density is the average density. In fact, the density of the mixed loading explosive in the blast hole changes with the depth of the blast hole. The prior art cannot measure the final sensitization density of the mixed loading explosive at different depths in the blast hole, and cannot meet the requirements of variable density construction of mixed loading explosives on site. Therefore, it is an urgent problem to be solved in the field of mine blasting exploitation to scientifically and effectively measure the final sensitization density of the mixed loading explosive with variable density in the blast hole by using a measuring device and method. UTILITY MODEL CONTENT

[0004] The utility model aims at the problem that the prior art can only measure the average density of the mixed loading explosive in the blast hole, cannot measure the final sensitization density of the mixed loading explosive at different depths in the blast hole, and cannot meet the requirements of variable density construction of mixed loading explosives on site, and provides a device for mixed loading explosive hole variable density measurement.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0006] An apparatus for measuring the variable density inside a borehole of mixed explosives includes a graduated cylinder with an open top and a sealing cover plate removably attached to the top of the graduated cylinder; the inner diameter of the graduated cylinder is set to be equal to the diameter of the borehole in the field; the sealing cover plate has two mounting holes, and a first reserved tube and a second reserved tube are respectively installed in the two mounting holes; an air valve and a constant pressure valve are respectively installed on the first reserved tube and the second reserved tube, and a pressure gauge for measuring the air pressure inside the graduated cylinder is installed on the constant pressure valve; it also includes an air pump, which is connected to the first reserved tube through an air pipe.

[0007] The present invention, employing the aforementioned technical solution, uses a graduated cylinder to simulate a blast hole in a mine. When measuring the density of mixed explosives at a certain depth within the blast hole, the following steps are taken: S1, open the sealing cover, inject the mixed explosives into the graduated cylinder, and record the mass of the mixed explosives; S2, close the sealing cover, turn on the air pump to pressurize the graduated cylinder, and after the pressure gauge reading reaches the predetermined pressure value, turn off the air pump and then lock the air valve; S3, after the height of the mixed explosives in the graduated cylinder no longer changes, measure the final sensitized volume of the mixed explosives through the graduated cylinder; S4, calculate the final sensitized density based on the mass of the mixed explosives and the final sensitized volume. An air pump is used to introduce high-pressure air into the measuring cylinder, increasing the internal pressure to simulate the pressure environment caused by the weight of the upper part of the mixed explosive. The predetermined pressure value varies depending on the depth to be measured; a larger predetermined pressure value is set when measuring the density of mixed explosive at deeper depths, and a smaller predetermined pressure value is set when measuring the density of mixed explosive at shallower depths. During the sensitization process of the mixed explosive in the measuring cylinder, the volume changes, resulting in changes in the internal air pressure. A constant pressure valve can release pressure to ensure that the internal air pressure remains constant at the predetermined value. Compared to existing technologies that can only measure the average density of mixed explosive within the borehole... The previous method could not measure the final sensitized density of mixed explosives at different depths within the borehole, failing to meet the requirements for variable density construction of mixed explosives on site. This invention addresses the problem of setting the inner diameter of the measuring cylinder according to the borehole diameter, pumping high-pressure air into the measuring cylinder to simulate the pressure environment caused by the weight of the mixed explosives, thus simulating the borehole environment. By changing the predetermined pressure value, the pressure condition of the mixed explosives at different depths can be simulated, thereby measuring the final sensitized density of the mixed explosives at different depths within the borehole. This facilitates variable density construction of mixed explosives on site, improves blasting excavation efficiency, and effectively controls construction costs.

[0008] Furthermore, it also includes at least one partition, the diameter of any partition being equal to the inner diameter of the measuring cylinder; in order to improve measurement efficiency, the final sensitization density of multiple mixed explosives with different initial densities can be measured simultaneously. Specifically, multiple mixed explosives with different initial densities are injected into the measuring cylinder one after another, and a partition is placed between any two mixed explosives to separate them, so as to ensure that the mixed explosives do not interfere with each other during the sensitization process.

[0009] Further, the graduated cylinder is provided with a scale, which is a height scale or a volume scale; if the scale on the graduated cylinder is set as a height scale, the sensitization volume of the mixed explosive can be calculated in combination with the cross-sectional area of the graduated cylinder; if the scale on the graduated cylinder is set as a volume scale, the sensitization volume of the mixed explosive can be directly read, which is more convenient.

[0010] Further, the graduated cylinder is made of transparent plastic material or transparent glass material; the material is easy to obtain, and the manufacturing of the graduated cylinder is convenient.

[0011] Further, the device further comprises a mixed explosive pumping device, which comprises a mixed explosive pumping pipe; the end of the mixed explosive pumping pipe can be inserted into the bottom of the graduated cylinder from the opening of the graduated cylinder to pump the mixed explosive into the graduated cylinder; the mixed explosive can be stably injected by inserting one end of the mixed explosive pumping pipe into the bottom of the graduated cylinder, so that the mixed explosive is prevented from splashing everywhere.

[0012] Compared with the prior art, the device has the beneficial effects that: the inner diameter of the graduated cylinder is set according to the diameter of the on-site blast hole, high-pressure air is pumped into the graduated cylinder to simulate the pressure environment of the upper part of the mixed explosive caused by its own gravity, so as to simulate the on-site blast hole environment; the pressure value can be changed to simulate the pressure condition of the mixed explosive at different depths, and the final sensitization density of the mixed explosive at different depths in the blast hole is measured, which is helpful for the variable density construction of the mixed explosive on site, is beneficial to improve the blasting excavation effect and effectively control the construction cost; the final sensitization density of multiple mixed explosives with different initial densities can be measured at the same time, and the measurement efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The figure is a structural schematic view of the device.

[0014] Marked in the figure: 1-gas valve, 2-gas pump, 3-gas pressure gauge, 4-mixed explosive pumping pipe, 5-gas pipe, 6-sealing cover plate, 7-first reserved pipe, 8-second reserved pipe, 9-graduated cylinder, 10-scale, 11-constant pressure valve, 12-baffle, 13-mixed explosive. DETAILED DESCRIPTION

[0015] The device will be described in detail below with reference to the drawings.

[0016] In order to make the purpose, technical scheme and advantages of the device more clear and understandable, the device will be further described below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the device, and are not used to limit the device.

[0017] The example provides a device for variable density measurement in a mixed explosive hole, which comprises a graduated cylinder, a gas pump, a gas pressure gauge, a gas valve, a constant pressure valve, a baffle, a mixed explosive and a mixed explosive pumping pipe. Figure 1As shown, including the top open cylinder 9 and can be removed from the top of the cylinder 9 cover sealing cover 6; the inner diameter of the cylinder 9 is set to equal the diameter of the site borehole; sealing cover 6 is provided with two mounting holes, two mounting holes are respectively provided with a first reserve pipe 7 and the second reserve pipe 8; the first reserve pipe 7 and the second reserve pipe 8 are respectively provided with a gas valve 1 and a constant pressure valve 11, the constant pressure valve 11 is provided with a gas pressure gauge 3 for measuring the gas pressure in the cylinder 9; also includes air pump 2, air pump 2 through the air pipe 5 and the first reserve pipe 7 are connected; air pump 2 is an electric air pump, the gas pressure gauge 3 is a digital gas pressure gauge;

[0018] The cylinder 9 is provided with a scale 10, the scale 10 is a height scale or volume scale; in this embodiment, the scale 12 is a height scale; the cylinder 9 is made of transparent material, specifically, it can be plastic material or transparent glass material.

[0019] Also includes mixed explosive pumping device, mixed explosive pumping device includes mixed explosive pumping pipe 4, can be through the end of mixed explosive pumping pipe 4 from the opening of the cylinder 9 into the bottom of the cylinder 9, to pump into the mixed explosive in the cylinder 9.

[0020] The cylinder 9 is used to simulate the mine site borehole, when measuring the density of mixed explosive at a certain depth in the borehole, the following steps are adopted: S1, open the sealing cover 6, pour the mixed explosive 13 into the cylinder 9, and record the mass of the mixed explosive 13; S2, cover the sealing cover 6, open the air pump 2, pressurize the cylinder 9, wait for the reading of the gas pressure gauge 3 to reach the predetermined pressure value, then close the air pump 2, and then lock the gas valve 1; S3, after the height of the mixed explosive 13 in the cylinder 9 no longer changes, the final sensitized volume of the mixed explosive 13 is measured by the cylinder 9; S4, the final sensitized density is calculated according to the mass and the final sensitized volume of the mixed explosive 13. The air pump 2 is used to introduce high pressure air into the cylinder 9 to increase the pressure in the cylinder 9, simulate the pressure environment brought by the self weight of the upper part of the mixed explosive 13; the size of the predetermined pressure value varies according to the depth to be measured, when measuring the density of mixed explosive at a deeper place, the predetermined pressure value is set to be larger, when measuring the density of mixed explosive at a shallower place, the predetermined pressure value is set to be smaller; during the sensitization process of the mixed explosive 13 in the cylinder 9, the volume will change, resulting in a change in the gas pressure in the cylinder, the constant pressure valve 11 can perform pressure relief treatment, so as to ensure that the gas pressure in the cylinder is constant at the predetermined value;

[0021] In order to improve the measuring efficiency, the final sensitized density of multiple mixed loading explosives 13 with different initial densities can be measured simultaneously, specifically, the device further comprises at least one partition plate 12, and the diameter of any partition plate 12 is equal to the inner diameter of the measuring cylinder 9; multiple mixed loading explosives 13 with different initial densities are injected into the measuring cylinder 9 in sequence, and the partition plate 12 is arranged between any two mixed loading explosives 13 to separate them, so as to ensure that the mixed loading explosives 13 do not interfere with each other during the sensitization process; the mass of each mixed loading explosive 13 is controlled to be small, so as to avoid that too large pressure is generated on the mixed loading explosive 13 below to cause too large measurement error; specifically, the height of each mixed loading explosive 13 is controlled to be 10cm-20cm; inert dyeing agents are added into each mixed loading explosive 13, so that the color of any two adjacent mixed loading explosives 13 is different, and the mixed loading explosives 13 in each layer are easy to distinguish, and the final sensitized volume of the mixed loading explosives 13 in each layer is easy to measure.

[0022] Compared with the prior art, the final sensitized density of mixed loading explosives at different depths in the blast hole cannot be measured, and the problem that the requirement of variable density construction of mixed loading explosives on site cannot be met is solved, the inner diameter of the measuring cylinder is set according to the diameter of the blast hole on site, high-pressure air is pumped into the measuring cylinder to simulate the pressure environment of the upper part of the mixed loading explosive caused by its own gravity, so as to simulate the environment of the blast hole on site, the pressure condition of the mixed loading explosive at different depths can be simulated by changing the size of the predetermined pressure value, and then the final sensitized density of the mixed loading explosive at different depths in the blast hole is measured, which is helpful for the variable density construction of mixed loading explosives on site, is beneficial to improve the blasting excavation effect and effectively control the construction cost; meanwhile, the final sensitized density of multiple mixed loading explosives with different initial densities can be measured simultaneously, and the measuring efficiency is improved.

[0023] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for measuring the variable density inside a hole of mixed explosives, characterized in that: The system includes a graduated cylinder (9) with an open top and a sealing cover (6) that is detachably installed on the top of the graduated cylinder (9); the inner diameter of the graduated cylinder (9) is set to be equal to the diameter of the borehole in the field; the sealing cover (6) has two mounting holes, and a first reserved pipe (7) and a second reserved pipe (8) are installed in the two mounting holes respectively; an air valve (1) and a constant pressure valve (11) are installed on the first reserved pipe (7) and the second reserved pipe (8) respectively, and a pressure gauge (3) for measuring the air pressure in the graduated cylinder (9) is installed on the constant pressure valve (11); the system also includes an air pump (2), which is connected to the first reserved pipe (7) through an air pipe (5).

2. The apparatus for measuring the variable density inside a hole of mixed explosives according to claim 1, characterized in that: It also includes at least one partition (12), any of which has a diameter equal to the inner diameter of the measuring cylinder (9).

3. The apparatus for measuring the variable density inside a hole of mixed explosives according to claim 1, characterized in that: The measuring cylinder (9) is provided with a scale (10), which is a height scale or a volume scale.

4. The apparatus for measuring the variable density inside a hole of mixed explosives according to claim 1, characterized in that: The measuring cylinder (9) is made of transparent plastic or transparent glass.

5. The apparatus for measuring the variable density inside a hole of mixed explosives according to claim 1, characterized in that: It also includes a mixed explosive pumping device, which includes a mixed explosive pumping pipe (4), and mixed explosives can be pumped into the measuring cylinder (9) by extending the end of the mixed explosive pumping pipe (4) from the opening of the measuring cylinder (9) into the bottom of the measuring cylinder (9).

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