CN-116297088-B - Device and method for measuring porosity and distribution of ore rock dispersion

CN116297088BCN 116297088 BCN116297088 BCN 116297088BCN-116297088-B

Abstract

The invention provides a device and a method for measuring porosity and distribution of a rock dispersion, which belong to the technical field of measurement of physical and mechanical properties of the dispersion, wherein the device comprises a test container, a detection mechanism, a pressurizing mechanism and a control system, and the test container comprises a liquid level cylinder and a sample cylinder which are communicated; the detection mechanism comprises a weighing device, a distance meter and a water injection pipe, wherein the weighing device is arranged at the bottom of the test container and used for measuring weight, the distance meter is arranged above the liquid level cylinder and used for measuring the distance between the distance meter and the liquid level in the liquid level cylinder, the water injection pipe is communicated with a water source and used for injecting water into the liquid level cylinder, the pressurizing mechanism is arranged above the sample cylinder and used for applying pressure to a sample in the sample cylinder and outputting a pressure signal, and the control system is connected with the detection mechanism and the pressurizing mechanism and used for processing and analyzing data. The invention can measure the porosity of the ore dispersion sample under different vertical pressures and the continuous reading distribution condition of the porosity in the vertical direction, thereby being more beneficial to the research of the ore dispersion.

Inventors

LIU HUAN
LI JINGLEI
LI GUOPING
Liu Runhan
HAO XIUJUAN

Assignees

内蒙古工业大学

Dates

Publication Date: 20260512
Application Date: 20230224

Claims (10)

1. A method for determining porosity and distribution of ore fines bulk material, comprising the steps of: placing a test container on a weighing device, filling a rock dispersion sample to be measured in a sample cylinder, and paving; Connecting a pressurizing mechanism to the top of the test cylinder, controlling the pressurizing mechanism to apply pressure to the ore dispersion sample, transmitting a pressure signal to the control system, and stopping operating the pressurizing mechanism when the pressure value reaches a preset pressure, wherein the height of the filling dispersion is H y ; fixing the distance measuring instrument and the water injection pipe to the position right above the liquid level cylinder; Controlling the water injection into the liquid level cylinder through the control system, and stopping water injection when the liquid level height is greater than the height of the communicated position at the bottom, and recording a weight value G measured by the weighing device and a distance value H measured by the distance meter when the liquid level is stable; Setting interval measurement height H, measurement times n, interval stabilization time t, radius r w of a liquid level cylinder, radius r y of a sample cylinder, density rho of water and distance H L from the lower end part of an initial range finder to the bottom of the liquid level cylinder in a control system; Step six, controlling water injection into the liquid level cylinder through the control system, stopping water injection when the distance value measured by the distance meter is H-H, and after the liquid level is stable, recording the measurement times 1, the weight value G 1 measured by the weighing device and the distance value H 1 measured by the distance meter, wherein the porosity k 1 of the ore dispersion sample from the position H L -H to the position H L -H 1 of the bottom of the sample cylinder is calculated by the formula (I): ; Recording the porosity k 1 value of the dispersion of the ore rock dispersion sample from the position H L -H to the position H L -H 1 at the bottom of the sample cylinder; And step seven, water is injected into the liquid level cylinder through the control system, when the distance value measured by the distance meter is H-i, water injection is stopped, after the liquid level is stable, the measuring times i, the weight value G i measured by the weighing device and the distance value H i measured by the distance meter are recorded, and then the porosity k i of the ore dispersion sample from the position H L -H i-1 to the position H L -H i of the bottom of the sample cylinder is calculated by the formula (II): ; The porosity k i of the dispersion from H L -H i-1 to H L -H i from the bottom of the cartridge was recorded for the ore dispersion, at which time the average porosity k 1-i of the dispersion from H L -H to H L -H i was: ; Step eight: repeating the seventh step until the measurement times are n, wherein the weight value of the weighing device is G n , the distance value measured by the distance meter is H n , the porosity of the ore dispersion body sample from the position H L -H n-1 to the position H L -H n of the sample barrel is k n , the values of porosity k n of the dispersion from H L -H n-1 to H L -H n and the average porosity k 1-n of the dispersion from H L -H to H L -H n were recorded for the ore rock dispersion samples; Step nine, after the measurement is finished, the measurement data are stored, and the measured values from the k 1 value to the k n value of the 1 st to the n th times of porosities are the continuous distribution of the porosities in the vertical direction from bottom to top under the set vertical pressure; and step ten, disassembling and cleaning the device, and preparing the next group of measurement.
2. An apparatus for measuring the porosity and distribution of ore dispersion by the method of claim 1, comprising a test vessel, a detection mechanism, a pressurizing mechanism and a control system, wherein, The test vessel comprises: the liquid level cylinder is used for supplying water and injecting; the sample cylinder is communicated with the bottom of the liquid level cylinder and is used for filling samples; The detection mechanism includes: the weighing device is arranged at the bottom of the test container and is used for measuring weight; The distance meter is arranged above the liquid level cylinder and is used for measuring the distance between the distance meter and the liquid level in the liquid level cylinder; the water injection pipe is communicated with a water source and is used for injecting water into the liquid level cylinder; the pressurizing mechanism is arranged above the sample cylinder and is used for applying pressure to the sample in the sample cylinder and outputting a pressure signal; The control system is connected with the detection mechanism and the pressurizing mechanism and is used for processing and analyzing data; The control system realizes the measurement of the porosity and distribution of the ore dispersion by setting the interval measurement height, the measurement times, the interval stabilization time, the radius of the liquid level cylinder, the radius of the sample cylinder, the density of water and the distance from the lower end part of the initial range finder to the bottom of the liquid level cylinder.
3. The device for measuring the porosity and the distribution of the ore dispersion according to claim 2, wherein the electromagnetic valve is arranged on the water injection pipe, and a bubbler is arranged at the water outlet end of the water injection pipe.
4. The apparatus for measuring the porosity and distribution of mineral rock dispersion of claim 2, wherein the detection mechanism further comprises a moving bracket for fixedly mounting the rangefinder and water injection pipe.
5. The device for measuring the porosity and the distribution of the mineral rock dispersion according to claim 4, wherein the movable support comprises a transverse supporting part, a vertical supporting part I and a vertical supporting part II, the transverse supporting part is connected to the top ends of the vertical supporting part I and the vertical supporting part II, the distance measuring instrument and the water injection pipe are fixed on the transverse supporting part, and movable wheels are arranged at the bottom ends of the vertical supporting part I and the vertical supporting part II.
6. The apparatus for determining porosity and distribution of ore fines according to claim 2, wherein the pressurizing means comprises: The support frame is detachably connected to the top of the sample cylinder; the pressing unit is arranged on the supporting frame and is selected from one of an electric push rod structure, a hydraulic rod structure, a pneumatic rod structure and a screw rod structure; And the pressure sensor is fixed with the pressing unit and is electrically connected with the control system.
7. The apparatus for measuring the porosity and distribution of ore dispersion according to claim 6, wherein the pressing unit has a screw structure, comprising: the screw rod is arranged on the support frame in a penetrating way and is in threaded connection with a nut arranged on the support frame; the rotating handle is fixed at the top of the screw rod and is positioned at the outer side of the supporting frame; the pressurizing plate is provided with a shape and a size matched with the sample cylinder, and the pressurizing plate is provided with air holes.
8. The apparatus for measuring the porosity and distribution of ore dispersion according to claim 7, wherein the pressing unit further comprises: the universal turntable is fixed at the bottom end of the screw rod, and the pressure sensor is arranged between the universal turntable and the pressurizing plate.
9. The device for measuring the porosity and the distribution of the ore dispersion according to claim 6, wherein the supporting frame is a cylinder with an opening at the bottom end, and the inner diameter of the cylinder is larger than or equal to the outer diameter of the sample cylinder; the connecting plate is arranged on the outer wall of the sample tube, a gap is arranged between the connecting plate and the outer wall of the sample tube so as to allow the tube to be inserted, and bolts for fastening the tube are arranged on the connecting plate in a penetrating mode.
10. The apparatus for determining porosity and distribution of mineral rock dispersion of claim 2, wherein the control system comprises a computer and a control cabinet, the computer being electrically connected to the control cabinet, the control cabinet being electrically connected to the detection mechanism and the pressurizing mechanism.

Description

Device and method for measuring porosity and distribution of ore rock dispersion Technical Field The invention belongs to the technical field of determination of physical and mechanical properties of dispersion, and particularly relates to a device for determining porosity and distribution of an ore dispersion. Background The porosity of a mineral rock dispersion refers to the percentage of the volume of the pores of the dispersion to the total volume. In underground metal mining processes, the porosity of ore dispersions in stopes affects the formation of sloughing, pay-out, loose bodies, and loss-dilution of ore. Therefore, the method has important guiding significance for further researching the fluidity of the dispersion, reducing the loss and dilution of ores, optimizing the structural parameters of a stope and the like. At present, a device for measuring the porosity of ore rock dispersion comprises an experiment box body, a monitoring mechanism and a control system, wherein during specific measurement, dispersion to be measured is added into an inner container of the experiment box body, the upper surface of the dispersion is paved, the control system drives an inner container cover to downwards run by an electric push rod, when the inner container cover touches the upper surface of the dispersion in the inner container, the electric push rod stops running, the stroke of the electric push rod is recorded by a computer, then water is injected into the inner container, when the water surface in the inner container touches a liquid level switch, an electromagnetic valve is closed, after the dispersion absorbs water, the water surface is lowered, when the lowering distance reaches a liquid level switch threshold value, the electromagnetic valve is opened, water is supplemented by circulation until the water surface is not lowered, namely, the water absorption of the dispersion is saturated, finally, redundant water after the dispersion is saturated by water absorption is extracted, the weight after the dispersion is saturated by water absorption is recorded, and the porosity is calculated according to a corresponding formula. The prior art realizes the automation of the experimental process, and can reduce the influence of human factors on the experimental process. In carrying out the invention, the inventors have found that the prior art has at least the following drawbacks: The prior art is only used for measuring the porosity of the ore dispersion, but as the mining depth increases, the thickness of the covering layer increases (namely, the vertical pressure increases), the porosity of the ore dispersion under different vertical pressures and the continuous distribution of the porosity in the vertical direction need to be determined, and the prior art cannot realize the measurement of the porosity distribution of the ore dispersion. Disclosure of Invention Based on the background problems, the invention aims to provide a device for measuring the porosity and the distribution of the ore dispersion, which can realize the measurement of the continuous distribution rule of the porosity of the ore dispersion under different vertical pressures, and another aim of the invention is to provide a method for measuring the porosity and the distribution of the ore dispersion. In order to achieve the above object, on one hand, the technical solution provided by the embodiment of the present invention is: the device for measuring the porosity and the distribution of the ore rock dispersoid comprises a test container, a detection mechanism, a pressurizing mechanism and a control system, wherein the test container comprises: the liquid level cylinder is used for supplying water and injecting; the sample cylinder is communicated with the bottom of the liquid level cylinder and is used for filling samples; The detection mechanism includes: the weighing device is arranged at the bottom of the test container and is used for measuring weight; The distance meter is arranged above the liquid level cylinder and is used for measuring the distance between the distance meter and the liquid level in the liquid level cylinder; the water injection pipe is communicated with a water source and is used for injecting water into the liquid level cylinder; the pressurizing mechanism is arranged above the sample cylinder and is used for applying pressure to the sample in the sample cylinder and outputting a pressure signal; the control system is connected with the detection mechanism and the pressurizing mechanism and is used for processing and analyzing data. In one embodiment, the water injection pipe is provided with an electromagnetic valve, and the water outlet end of the water injection pipe is provided with a bubbler. In one embodiment, the detection mechanism further comprises a mobile bracket for fixedly mounting the rangefinder and the water injection pipe. Further, the movable support consists of a transverse supporting part, a