CN201233230Y - Displacement measurement machine for working face baseboard - Google Patents

Abstract

A displacement measuring device used for the floor of a coal mining face, which consists of a connecting rope arranged on a fixed seat of the rock formation at the bottom of a drilling hole, a rock-following device connected to the connecting rope at the rock formation to be measured, and a It consists of a transmission pipe leading to the ground, and a reader is arranged at the exit of the transmission pipe. When in use, the bottom fixing seat of the measuring device is fixed on the rock formation with zero displacement, and the rock-following device is fixed on the rock layer to be measured and has a large displacement. Relative movement, the piston drives the indicator liquid to descend, and the relative movement of the rock formation can be known through the display of the reader. Its structure is simple, safe and reliable, and its measurement accuracy is high. It can play an early warning role for water inrush in the working face, avoid the occurrence of water disasters, and provide a reliable guarantee for the safety of coal mines.

Description

A Displacement Measuring Device for the Floor of Coal Mining Face

technical field

The utility model relates to a displacement measuring device, in particular to a displacement measuring device used for the floor position of a coal mine working face.

Background technique

Testing the displacement of the floor of the coal mine working face is of great significance for studying the mechanism of water inrush from the floor of the working face, monitoring the process of water inrush from the floor of the working face, and preventing water inrush from the floor of the working face. However, because the roof of the working face falls at any time, the environment in the goaf is very complicated, especially the reference point is difficult to find, and it is still very difficult to test the displacement of the bottom plate of the working face. Some scientific workers use the drilling method for measurement. The main plan is to dig a special detection lane on the bottom plate of the working face, and then construct a drill hole upwards, install corks at the corresponding layers in the drill holes, and tie a cork on the cork. Thin iron wire, through testing the iron wire to reflect the displacement of the bottom plate of the working face. However, the measurement accuracy of this method is low, and the cork is easy to fall off, and it is very inconvenient to drill a special roadway on the floor of the working face to arrange drilling holes. In some working faces, there is even no condition for driving a detection roadway at all.

Contents of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, to provide a simple structure, which can accurately measure the displacement of the bottom plate of the working face, play an early warning role for the water inrush of the working face, and avoid the occurrence of water disasters for the bottom plate of the coal mine working face. displacement measurer.

The technical scheme of the utility model is: it is composed of a connecting rope arranged on the fixed seat of the rock formation at the bottom of the borehole, a rock-following movement device connected to the connecting rope, which is arranged at the rock formation to be measured, and a transmission pipe connected to it to lead out from the ground. , a reader is provided at the outlet of the transmission tube.

The rock-moving device is composed of a column barrel with indicating liquid on the upper part, a piston matched with the column barrel and a spring arranged below the piston; the outer part of the connecting rope is covered with a protective tube; the protective tube is It is formed by connecting multiple metal pipes; the transmission pipe is a double casing with a flexible pipe on the inside and a metal pipe on the outside.

The beneficial effects of the utility model are: the displacement measuring device of the bottom plate of the working face is stable and reliable, and will not fall off; since the reading device magnifies the displacement of the rock layer by a hundred times, the measurement accuracy is greatly improved; there is no need to dig a special roadway for drilling, saving Low cost, easy to expand the measurement range; convenient observation, and continuous observation; the combination of softness and firmness of the device is especially suitable for use in complex environments in gobs, and is suitable for installing instruments in complex environments on working faces; low installation cost , no need to construct a special roadway; simple structure, safe and reliable, can accurately measure the displacement of the bottom plate of the working face, play an early warning role in the water inrush of the working face, avoid water disasters, and provide a reliable guarantee for coal mine safety.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

In the figure: 1—fixed seat, 2—protective pipe, 3—connecting rope, 4—spring support plate, 5—spring, 6—grouting hole, 7—piston, 8—rock moving device, 9—column barrel, 10—transmission pipe, 11—reader, 12—bottom rock, 13—drilling hole, 14—rock formation to be tested, 15—wind tunnel

Detailed ways

The utility model will be further described below in conjunction with the embodiment in the accompanying drawings:

The utility model is used for the displacement measuring device of the bottom plate of the coal mine working face, which consists of a bottom fixing seat 1, a protection tube 2, a connecting rope 3, a spring support plate 4, a spring 5, a grouting hole 6, a piston 7, and a rock moving device 8 , column bucket 9, transfer tube 10, reader 11 is composed. Bottom fixed seat 1 is cylinder, is located in bottom rock 12, height 0.5m, and diameter is determined according to the diameter of corresponding borehole 13; The fixed seat 1 is connected, and the upper end is connected with the piston 7 in the rock moving device 8, and the rock moving device 8 is arranged at the rock formation 14 to be tested; the outer part of the connecting rope 3 is equipped with a protective tube 2, and the protective tube is made of a multi-section metal casing. Connected, each section of casing is 1.5m long and 3-4cm in diameter. Each section of casing is thinner at the top and thicker at the bottom, and the inner diameter of the lower part is equal to the outer diameter of the upper part. When connecting, just insert the upper part into the lower part. One end of the protection tube 2 is connected to the bottom fixing seat 1 , and the other end is connected to the spring support plate 4 , the spring support plate 4 is connected to one end of the spring 5 , and the other end of the spring 5 is connected to the piston 7 . The rock moving device 8 is cylindrical, with a height of 0.5m and a diameter slightly smaller than the diameter of the borehole. The lower part of the inner cavity is equipped with a piston 7, a spring 5, and a spring support plate 4. The lower end of the piston 7 is connected with the connecting rope 3, and the piston 7 is connected with the The inner cavity of the rock-moving device 8 is well sealed, and the transmission pipe 10 is a double casing with an inner hose and a metal pipe. One end is connected to the rock-moving device 8, and the other end is connected to the reader 11; The reader 11 at the end is transparent cylindrical with standard scale engraved; the sealed chamber of the rock-following movement device 8 and the transmission pipe 10 is filled with indicating liquid, which has two colors, and the interface between the two liquid colors As the reading point of the reader.

Working process: Before the working face is mined, construct the drilling 13 in the cut hole or other suitable positions. After the drilling is completed, connect the bottom fixing seat 1 and the connecting rope 3, and then install the first section of the protective pipe 2 , put it into the drill hole, clamp the connecting rope 3, so that the bottom fixing seat 1 and the protection tube 2 will not fall off, then put on the second section of protection tube 2, and then put it into the drill hole, and so on until the protection tube 2 is installed , then connect the spring bracket 4, spring 5, connecting rope 3, piston 7, and column barrel 9 in sequence, slowly put the above connecting body into the drill hole, and connect the transmission pipe 10 at the same time, when the whole device is put in place, through injection The grout hole 5 injects grout or chemical slurry in the borehole to seal the whole borehole. Lead out the transmission pipe 10 from the borehole, lay it along the bottom plate of the working face, and cover it with an iron pipe for protection. The interface of is located at the zero position of the reader 11. After the mining of the working face, the rock layer on the floor of the working face will move upward under the action of groundwater pressure and mine pressure. When the rock layer 14 to be tested moves, it will drive the column barrel 9 of the rock moving device to move upward, At this time, the piston 7 is still (or the amount of movement is very small) due to being connected to the bottom fixed seat 1, and the relative displacement will occur between the piston 7 and the column barrel 9, and the indicating liquid in the column barrel 9 will also move downward. 8 is communicated with the reader 11 through the transmission pipe 10, so the indicator liquid in the reader 11 will also drop, and the displacement of the rock formation 14 to be measured can be obtained by reading the drop value of the indicator liquid and dividing it by the multiple of the area.

Claims (5)

1. A displacement measuring device for the floor of a coal mining face, characterized in that: it consists of a connecting rope (3) arranged on a fixed seat (1) of the rock formation (12) at the bottom of the borehole, and a connecting rope (3) ) connected to the rock-moving device (8) at the rock layer (13) to be tested and the transmission pipe (10) connected to it to lead out of the ground, and the rock-moving device (8) is provided with a grouting pipe (6) , a reader (11) is provided at the outlet of the transfer pipe (10). 2. The displacement measuring device for the bottom plate of coal mine working face according to claim 1, characterized in that: said rock-following device (8) consists of a column barrel (9) with colored liquid on the top, and a column barrel (9) The matched piston (7) and the spring (5) located at the piston (7) below constitute. 3. The displacement measuring device for the bottom plate of coal mine working face according to claim 1, characterized in that: said connecting rope (3) is covered with a protective tube (2). 4. The displacement measuring device for the bottom plate of coal mine working face according to claim 3, characterized in that: the protection tube (2) is made of multi-section metal tubes socketed. 5. The displacement measuring device for the bottom plate of coal mine working face according to claim 1, characterized in that: the transmission pipe (10) is a double casing with a hose inside and a metal pipe outside.

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