SU1460339A1 - Method of determining the location of bodies of low-amplitude geological faults in gas-bearing coal seam mining - Google Patents

Abstract

This invention relates to mining, and b. used in the development of gas-bearing coal seams. The goal is to increase operational efficiency and reduce the laboriousness of establishing the location of a small-amplitude geological disturbance by determining its parameters in the depth of the array. Set the background temperature (T) of the coal surface in this development. In the process of excavation is monitored continuously along the length of production T of the surface of the bottom. Plots with a decrease in T of 2% or more are determined. This is a sign of the occurrence of a hole in a geological disturbance (GN) zone. Proceed to the determination of the zone of violation along the bottom line and the direction of the GN to the depth of the array. At the same time, the zone of influence along the line of the slab is defined as the width of the area on which the decrease of the surface T of the blade is established. The direction of the IG with respect to the line is determined by a straight line. The line is formed by connecting the coordinates of T max downs after mining the array in depth for several cycles, for example, 1.5-2 m. at that, at 1 4А // А / о 2, the distance to ГН is assumed to be 5-10 m а and at 4Д // А / о 2 2-5 м. 1 Il. cl

Description

one

The invention relates to the mining business and can be used in the development of coal-bearing gas beds.

The purpose of the invention is to increase the operational efficiency and reduce the laboriousness of establishing the location of a small amplitude geological disturbance by determining its parameters by the depth of the array.

The drawing shows an example of determining the parameters of a geological disturbance.

The method is dried, there is a following way.

Pre-set the background temperature of the surface of the coal in the concrete development. Then, during coal extraction, the surface temperature of the bottom hole is continuously monitored along the length of the mine, the temperature of the mine face can be monitored using both contact and non-contact methods, for example, using contact electrothermometers or contactless rock temperature meters.

In the process of measuring along the length of production, the areas are fixed with a decrease in temperature by 2% or more relative to the background temperature of the bottom surface. If, at a subsequent coal excavation, a lower value of the surface temperature at the bottom is maintained in the fixed production areas, or it is consistently lowered as the excavation measure, this is a sign of the penetration of the development into the zone of geological disturbance. Starting from a cycle

four

O5 O 00 00

with

The grooves, on which a decrease in temperature is recorded, determine the zone of influence of the geological disturbance along the bottom line and the direction of the geological disturbance to the depth of the massif. The influence zone along the bottom line is defined as the width of the area along the bottom side, on which the bottom surface temperature decrease is found. The direction of the geological disturbance relative to the bottom line

The temperature was 1 ° C. In this case, the maximum decrease is at the level of 246.1 m, and the limits of decrease are 244-249 m. Having calculated

value, 3, compare its values

by a cue by the formula, it is determined that under the given conditions the distance to the violation is m.

Geological disturbance direction

is determined by a straight line, connecting it, it is set 10 relative to the bottom line.

the coordinates of the maximum decrease in temperature in the selected areas after mining the array to a depth of 1.5-2.0 m.

For example, as a result of preliminary

along a straight line connecting the bottom temperature drop maxima in the second section before and after mining at 89 m, i.e. connecting the coordinate

measurements was set background temp. The mi xi ,, lm straight surface of the bottom is the length of the lava, 1 ° С. When coal was excavated in lava, a comparison was made of the current, its bottom temperature from the background and areas were fixed with a decrease in temperature by 2% more relative to the background, i.e., decreasing by, 5 ° C. In one of the excavation cycles, the temperature was reduced by more than 2% from the background in two areas of lava: the first one at 190-191 m, the maximum decrease at 190.5 m and the second at 250-252 m, and maximum 251 m.

During the subsequent, it did not detect formation mining in other cycles of excavation of sections with decreasing temperature. After working the reservoir to the control depth L / a of 1.89 m in the first section, the drop in temperature D was D, 62 ° C (2.3% of the background), the maximum being at 193 m and the border at 192-194 m By calculating the ratio values, 2, compare it with the formula "tj

with the value established by the formula It is determined that at these

25

her and extending it in depth by 2-5 m.

The zone of influence of the uncovered disturbance along the bottom line is 5 m, 249-244 m along the length of the lava.

20 The predicted width of the zone of influence at the predicted depth is determined by connecting the two straight lines of the boundaries of the areas of decrease in temperature on the base of 1.89 m, extending them into the depth of the reservoir by 285 m. The predicted zone of influence of the disturbance in the depth of the reservoir is 2- 5 m is obtained by 9 m.

In the course of further excavation, the coal in the first section of the violation was opened after testing another 6.3 m of coal

30,206 meters of lava, i.e. L0aia 8.19 m; the width of the zone of influence was (209–204 m) 5 m, the maximum decrease in temperature L / 0 ,.

In the second section, the violation was opened after testing another 2.5 m of the array

35 on 237 m of lava, i.e. 1f1sg 4.39 m, width of the zone of influence 8 m, maximum decrease in temperature, 073 / F.

K40

4Ai: 9

l So

The distance to the violation is 10 m. The direction of the geological disturbance relative to the bottom line is determined by a straight line connecting the coordinates of the bottom temperature drop maxima in the designated area before and after mining at 89 m, i.e. connecting the coordinate 190.5 with a coordinate of 193 m by a straight line and extending it to the depth of the array by 5-10 m. The zone of influence of the disturbance along the bottom line is 2 m (194-192) m.

At the predicted depth, the width of the zone of influence is determined by connecting the straight line of the boundary of the areas of decrease in temperature on the base of 1.89 m and extending them by 5-10 m in depth. Get the predicted width of the zone 209-204 5 m. 55

In the second section of the decrease in temperature after the reservoir has been mined to the control depth, 89 m decrease in temperature50

Claims (1)

Invention Formula The method of determining the location of the bodies of small-amplitude geological disturbance during the development of a gas-bearing coal seam, including determining the zones of geological disturbances, determining the temperature outside these zones, continuously measuring the temperature of the reservoir bottom along its entire length, identifying areas with a lower temperature and fixing at these sites the location of the centers of areas with reduced temperature in depth from processing, characterized in that, in order to increase efficiency and reduce labor capacity, position of a small amplitude geological disturbance due to the determination of its parameters by the depth of the array, beyond the boundaries of the selected areas with reduced temperature along the length of the mine take the coordinates with a decrease in temperature by at least 2% The temperature was 1 ° C. In this case, the maximum decrease is at the level of 246.1 m, and the limits of decrease are 244-249 m. Having calculated value, 3, compare its values by a cue by the formula, it is determined that under the given conditions the distance to the violation is m. Geological disturbance direction  in relation to the line, the set  in relation to the line, the set along a straight line connecting the bottom temperature drop maxima in the second section before and after mining at 89 m, i.e. connecting the coordinate  m xi ,, l m pry my line her and extending it in depth by 2-5 m. The zone of influence of the uncovered disturbance along the bottom line is 5 m, 249-244 m along the length of the lava. The predicted width of the zone of influence at the predicted depth is determined by connecting the two straight lines of the boundaries of the areas of decrease in temperature on the base of 1.89 m, extending them into the depth of the reservoir by 285 m. The predicted zone of influence of the disturbance in the depth of the reservoir is 2-5 m gets 9 m. In the course of further excavation, the coal in the first section of the violation was opened after testing another 6.3 m of coal 206 m of lava, i.e. L0aia 8.19 m; the width of the zone of influence was (209–204 m) 5 m, the maximum decrease in temperature L / 0 ,. In the second section, the violation was opened after testing another 2.5 m of the array on 237 m of lava, i.e. 1f1sg 4.39 m, width of the zone of influence 8 m, the maximum drop in temperature, 073 / F. 0 five 0 Invention Formula The method of determining the location of the bodies of small-amplitude geological disturbance during the development of a gas-bearing coal seam, including determining the zones of geological disturbances, determining the temperature outside these zones, continuously measuring the temperature of the reservoir bottom along its entire length, identifying areas with a lower temperature and fixing at these sites the location of the centers of areas with reduced depth of mining, characterized in that, in order to increase efficiency and reduce the complexity of setting position of small-amplitude geological disturbance due to the determination of its parameters by the depth of the array, beyond the boundaries of selected areas with reduced temperature along the length of the mine take the coordinates with a decrease in temperature by at least 2% relative to the temperature outside the geologic disturbance zone and the location of the centers of zones with reduced temperatures, the extent of the geologic disturbance over several cycles determines the extent of the geologic disturbance, and the distance to the geologic disturbance is determined by the ratio D / decrease of the bottom temperature when the reservoir is mined to the selected depth to depth A / o working, when what is if the distance to geological disturbance is 5–10 m, and when equal to 2–5 n W 200 2U Length of lava, m 2W