SU521391A1 - Apparatus for determining fracturing of rocks - Google Patents

Description

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The equipment necessary for the injection of gas and liquid is installed and stirred in the mine workings near the sample well.

The device works as follows

When determining the height of the propagation zone of water-conducting cracks, the device is placed in the well. To isolate the studied interval of rocks in the well, cylinders 5 supply gas (nitrogen, compressed air) under pressure R. | through hose 12 through from; version 6. After that, a liquid under pressure is fed through the hose 13 and pipe 8 into the annular chamber 7.

Control of leakage of fluid through the contact of cylinders - rock is carried out using parametric sensors 9, which in the case of penetration of even individual drops of liquid, give a signal through wires 1O to the console, where the control can be performed by a capacitance meter, ohmmeter or other measuring instrument 11.

After testing this range of rocks, the pressure of gas and liquid is removed, the device is moved along the well, and all operations associated with the injection of gas and liquid are repeated. Movement device6

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along the well at some well-tested interval, liquid does not begin to leak through the cracks formed in the rocks. Conversely, if the device is first moved around the fracture zone, the movement is carried out until the leakage of fluid ceases. Thus, as a result, the boundary of cracking in rocks is established.

Claims (1)

Invention Formula A device for determining the fracture of rocks, comprising a housing, at the ends of which elastic gas cylinders are installed, forming an annular gap filled with fluid in the well, characterized in that, in order to improve the measurement accuracy by monitoring fluid leaks from the annular gap, the cylinders are made with grooves in which parametric gears are installed, made in the form of spring rings that interact with the cylinders and the walls of the wells.