SU1765459A1 - Salt rock gas-bearing property determination device - Google Patents

Description

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(21) 4618437/03 (22) 12.12.88 (46) 30.09.92. Bul Number 36

(71) Leningrad Mining Institute. G.V. Plekhanov

(72) A.C. Kirichenko and B.A. Wolves

(56) USSR Author's Certificate No. 829972, cl. E 21 F 5/00, 1971.

USSR Author's Certificate No. 1346821, cl. E 21 F 5/00, 1986. (54) DEVICE FOR DETERMINING THE GAS MAKING OF SALT BREEDS

(57) The invention relates to the mining industry, and m. used to determine the gas content of emission-prone salt rocks. The goal is to improve the accuracy of determining the gas content by reducing the volume of air in the device. The device includes a housing made in the form of communicating vessels with a lid. A float with a scale is installed in one vessel. In the second case, a sample glass is fixed on the lid in a fixed position, fixed with the possibility of detaching it. The solvent is poured into the vessel; its amount is recorded by raising the float. In a perforated cup lay a sample of gas-bearing rock. The cup is suspended from the lid and the vessel is hermetically sealed. Then the glass is immersed in the solvent. Due to the dissolution of the rock, the volume of the gaseous phase above the surface of the solution changes. This is recorded by moving the float with a scale, on which size the gas content is determined. 1 il.

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The invention relates to the mining industry and can be used to determine the gas content of outburst hazardous rocks.

A device is known for predicting the outburst hazard of potash zones, based on an assessment of gas content, which includes a microphone, a funnel for the water inlet, a grid, outer and inner cups.

The disadvantage of the devices is the low accuracy and complexity of the determination of gas content.

It is also known a device for determining the gas content of samples of outburst salt, including a housing, a lid, and an internal perforated glass with a rock sample.

A disadvantage of the known device is the complexity of the gas registration process in the sample and the low accuracy of the determinations due to the need to take into account the effect of shrinkage of the salt rock on the determination of gas content.

The aim of the invention is to simplify the process of registering gases and improving the accuracy of determining the gas content of rock samples by eliminating the effect of shrinkage of the rock during dissolution.

The goal is achieved by the fact that the casing is made in the form of communicating vessels, one of which is hermetically sealed with a lid with a perforated sample glass suspended from it on the latch, and the lid is provided with a hole with a tap,

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another vessel has a float with a scale and a limiter.

The drawing shows the proposed device in section.

The device contains vessels 1,2, a lid 3, a perforated cup with a sample 4, a cross member 5, holes 6, 7 in the crossbar, a clamp 8, a rotary knob 9, a seal 10, a hole 11 in the lid, a tap 12, communicating the hole 13, float with a scale of 14, the limiter 15 on the float, the centering sleeve 16.

The vessel 1 is hermetically sealed with a lid 3, to which a perforated sample cup is suspended, including a cross member 5, on which there is a central oblong hole 6 and a hole 7 for the protrusion of the lid. The cup is suspended by means of a clamp 8 with a handle 9 which enters the opening 6, and the cup is held in a predetermined position by a protrusion that enters the opening 7 of the cross member. The handle 9 of the clamp is sealed with a seal. On the lid 3 there is an opening 11, which is closed by a tap 12. In the vessel 2, which communicates through the opening 13 with the vessel 1, a float with a scale 14 and a stopper 15 is placed, which can be moved in the centering sleeve 16.

The device works as follows

Fill the vessel 1 with the specified amount of solvent (water), which is recorded by raising the float with a scale of 14 in vessel 2..

Put a sample of gas-bearing rock of a given volume into the perforated cup, hang it to the lid 3 using the clamp 8, inserted into the hole 6 and turned with the handle 9. The lid of the lid should fit into the hole with the hole 7 of the crossbar. The lid with the perforated cup is sealed the vessel 1, the valve 12 being set in position to communicate the internal space of the device with the atmosphere through the opening 11; After the cover 3 is installed, the valve 12 is closed, then by turning the knob 9 the clamp 8 is removed for engagement with the cross member 5 and perforated cup with sample 4 is omitted in the solvent in the upper layer and it is held by the internal protrusions of the vessel 1 to complete dissolution. We register the movement of the float with the scale 14. Opens the lid 3, pour the contents, wash the perforated cup and proceed to another experience.

Dissolving the rock leads to a change in the volume of the gaseous phase above the surface of the solution due to gas evolution from the rock, manifestation of shrinkage of the salt rock during dissolution, opening the volume of closed pores and absorption of some part of the gas with the solution, which will affect the movement of the float with a scale of 14 in the vessel 2. By neglecting the last two components, as values of small order, we obtain that the increment magnitude of the movement of the float with a scale of 14 Al is expressed by the functional dependence I

(Vr Vy),

where Vr is the volume of gas evolution;

Vy is the volume of shrinkage of the salt component in the solution.

Ultimately, since vessels 1 and 2 communicate through opening 13, the volume of shrinkage is transformed into a change in the initial level of fluid in these vessels. If the volume of gas is zero, i.e. there is no gas in the rock, the position of the float with a scale of 14 will be constant and reflect only the concentration of the solution, since the shrinkage depends on it.

The level in vessels 1 and 2 will be the same as the solid salt component goes into solution and these vessels are connected. For gas, the solution plays the role of a barrier liquid and the entire device will work as a Y-shaped pan gauge. Vessels 1 and 2 are selected so as to record a small gas emission, for example 0.1 cm 3 per 1 cm 3 of rock. During gas evolution, the level of liquid in vessel 2 will be higher by the amount of gas evolution. Ultimately, the expression (I) for this device is given in view II

(Vr)

Thus, the proposed device will only register gas release from the rock, which simplifies the process and also improves the accuracy of its determination.

Claims (1)

Invention Formula A device for determining the gas content of salt rocks, including a body in the form of communicating vessels with lids, one of which has a float with a scale, and the second hangs a sample glass, characterized in that, in order to increase the accuracy of gas content by reducing air volume in the device, the sample cup is fixed on the lid of the second vessel in a fixed position with the possibility of disconnecting it. 7 5 43 /