SU1102950A1 - Method of determining the height of water-conducting fissures over worked space - Google Patents

Abstract

METHOD FOR DETERMINING THE HEIGHT OF THE ZONE OF THE WATER CONDUCTING CRACKS OVER THE DEVELOPED SPACE, which includes measuring the air flow rate in a well drilled from the surface and does not intersect the well, which in order to improve the efficiency of measurements, periodically fill the well material with a well. measure the air flow rate at the mouth, after detecting the absence of movement of the air flow stop filling the wells and measure the level of backfill, on which the court about the height of water boiling zone cracks. (I'm Yu with SD

Description

The invention relates to the mining industry, namely, mine hydrogeology, and can be used for hydrogeological substantiation of underground mining systems and safe mining conditions.

The known method of flow logging of wells in subsized arrays for determining the zone of water-conducting cracks in both dry and watered rocks, based on the principle of comparing the specific water absorption of two wells, for which it is necessary to pour water into the wells, maintaining its level and performing at the same time flow logging 1.

However, this method is laborious, as it requires the involvement of additional vehicles and special technical devices for filling water into wells, which is ineffective under conditions of a dried massif and unsafe when conducting underground mining.

There is a known method for determining the height of the zone of water-connected cracks above the developed space, including measuring the velocity of the natural air flow in a well drilled from the day surface and not intersecting the generation 2.

The disadvantages of this method are its laboriousness, associated with the need to involve for measuring the recording and downhole equipment, means for starting and lifting the cable, as well as the dependence of the measurement results on the diameter of the well.

The purpose of the invention is to increase the efficiency of measurements.

The goal is achieved by the method of determining the height of the zone of water conducting cracks above the developed space, including measuring the air flow rate in a well drilled from the day surface and not intersecting production, periodically fill the well material with a flowable material At the mouth, after detecting the absence of air flow, the well filling is stopped and the level of backfill is measured, by which the height of the water zone is judged conductive cracks.

FIG. 1-5 depict phases illustrating this method.

The method for determining the height of the zone of water-conducting cracks above the generated space is carried out as follows.

From the day surface 1 (see Fig. 1) into the zone of water conducting cracks 2, formed under the influence of the development of the ore deposit 3 and the exhausted space 4 in the developed area of the ore deposit 5, the well 6 is drilled to a depth ensuring that it enters the water supply 2. The opening by the well 6 of the zone of water conducting cracks 2 leads to the establishment of an aerodynamic connection between the day surface 1 and the exhausted space 4, which experience different pressure values, which leads to the appearance of a natural flow 7. After the completion of the drilling of well 6, an instrument 8 (see Fig. 2) measures the flow rate of air 7 at the mouth of 9 wells 6. From the metering device 10 bulk material

11 (for example, gravel) is delivered to the well 6 and again by the instrument 8 (see Fig. 4) the air flow rate 7 is measured at the mouth 9. The air flow 7 is measured after each interval filling of the well 6 with bulk material II until zero readings of the device 8. According to the height h of level 12 (see Fig. 5) of the bulk material 11 in the well 6, corresponding to the zero reading of the device 8, the height H is measured, and the zones of water conducting cracks 2.

Example. In the field, a well was drilled to a depth of 398 m, in the interval O-108 m, lined with pipes with a diameter of 146 mm, the drilling diameter in the interval 108-

398 m -112 mm, having opened the zone of water-conducting cracks, in which the air flow velocity was measured at a small immersion (10-15 cm) of an MC-13 anemometer device. The instrument was then removed from the wellhead and, through a drum-type metering unit, the wellbore for a certain interval (20 to 1 m) was filled with previously prepared material, such as gravel. The well filling interval is determined by the

Accuracy of measurements after filling with the same MS-13 device at the wellhead measures the air flow rate, then the cycle repeats until the instrument reaches zero, i.e., until the natural flow in the well ceases. Then when

the plumbing aid determines the level of the well, which is used to judge the height of the zone of water conducting cracks.

The use of this method for determining the height of the zone of water-conducting cracks reduces the implementation time of the method by 2.8 times, simplifies the procedure for conducting work and interpreting the field materials, and also eliminates the dependence of the measurement results on the diameter of the well.

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Dzig.B

Claims (1)

METHOD FOR DETERMINING YOUR CELLS OF THE WATER-CONDUCTING ZONE OF THREE TIRES ABOUT THE SIMPLIFIED SIMPLICITY, including measuring the air velocity in the well drilled from the surface and not tapping production, characterized in that, in order to increase the efficiency of measurements, the well is periodically filled with bulk material and after each filling, the airflow velocity at the wellhead is measured, after detecting the absence of airflow movement, the filling of the wells is stopped and the level of backfill is measured, according to which the height of the zone of water cracks. '4