CN209413936U - An anti-clogging device applied to the drilling wall protection of soft coal seam drainage - Google Patents

Abstract

The utility model relates to technical field of coal exploitation, one kind being applied to weak seam extraction borehole retaining wall preventing clogging up device, for being inserted into weak seam extraction borehole, it include anti-blocking support end applied to weak seam extraction borehole retaining wall preventing clogging up device, gas collecting tube, fetter tube coupling, releasing pipe and ventilative tarpaulin, wherein gas collecting tube, constraint tube coupling and releasing pipe successively finish up connection, the densely covered gas collection hole of the body surfaces of gas collecting tube, free terminal of the anti-blocking support faces end head plugging in gas collecting tube, the anti-blocking support end includes the guide head positioned at head, guide head is equipped with several support rods being spacedly distributed, the ventilative tarpaulin is connected to support rod and gas collecting tube tail portion, so that ventilative tarpaulin wraps up gas collecting tube, it realizes ventilative and obstructs coal slag granules object.

Description

An anti-clogging device applied to the drilling wall protection of soft coal seam drainage

technical field

The utility model relates to the technical field of coal mining, in particular to an anti-clogging technology applied to the drilling wall protection of soft coal seams.

Background technique

The occurrence conditions of coal seams in my country are complex, and there are a large number of outburst dangerous coal seams, while outburst coal seams and some high-gas coal seams are generally relatively soft. When drilling in soft coal seams, especially in areas with high ground stress, problems such as hole sticking, low success rate, and small hole depth are prone to occur. The depth of bedding drilling in most mines is below 100 meters.

Even after the hole is drilled, as the mining face advances, the stress in the coal seam changes continuously, and even due to the self-weight of the coal body on the hole wall, the hole wall partially collapses, causing blockage in the gas-gathering section of the drilling drainage device , which reduces the effective extraction time of the borehole and affects the drainage effect.

Utility model content

In order to solve the above problems, the utility model proposes an anti-clogging device applied to the drainage of soft coal seams, which can improve the effective extraction time of the drilling holes, ensure the effective extraction radius, and increase the mining effect.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

In the first technical proposal, an anti-clogging device applied to the drilling hole protection wall of soft coal seam extraction is used to be inserted into the drainage drilling hole of soft coal seam, and the anti-clogging device applied to the drilling hole protection wall of soft coal seam extraction The supporting end, the air collecting pipe, the binding pipe joint, the extraction pipe and the air-permeable tarpaulin, wherein the air collecting pipe, the binding pipe joint and the exhausting pipe are connected at the end in sequence, and the main surface of the air collecting pipe is densely covered with air collecting holes, and the anti-blocking support end Blocked at the free end of the air collection pipe, the anti-blocking support end includes a guide head located at the head, the guide head is provided with a number of support rods distributed at equal intervals, the breathable tarpaulin is connected to the support rod and the tail of the air collection pipe, The breathable tarpaulin wraps the air collecting pipe to achieve ventilation and block cinder particles.

In the first technical solution, as a preference, the head of the inner wall of the binding tube section is provided with a second binding ring, and the outer wall of the tail of the air collecting pipe is provided with a first binding ring, and the binding pipe section and the collecting pipe pass through The second restraint ring and the first restraint ring are fixedly plugged together, and the air-permeable tarpaulin is fixed at the junction of the second restraint ring and the first restraint ring.

In the first technical solution, preferably, the binding pipe joint and the drainage pipe are connected through threads.

In the first technical solution, preferably, the end section of the drainage pipe is arranged at the orifice plugging end of the drainage borehole corresponding to the soft coal seam.

In the first technical solution, preferably, the anti-blocking supporting end includes an end pipe plug, and the end pipe plug is closed and inserted at the head of the gas collecting pipe, and the surface of the end pipe plug is densely covered with Breathable holes.

In the first technical solution, preferably, there are multiple extraction pipes, and the multiple extraction pipes can be butted one by one.

The beneficial effects of using the utility model are:

The anti-clogging device applied to drilling holes for drainage in soft coal seams has a novel structure, simple operation, high reliability in use, and low cost, and can effectively increase the effective extraction time of drilling holes and improve the extraction effect of drilling holes. It can increase the effective extraction time of the borehole and improve the extraction effect of the borehole. At the same time, the utility model is suitable for pressure measurement drilling, especially for soft coal seams.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model applied to the anti-clogging device of the drill hole protection wall in the extraction of soft coal seam.

Fig. 2 is a schematic diagram of the structure of the anti-blocking support end of the utility model applied to the anti-blocking device of the drilling wall protection in the extraction of soft coal seams.

Fig. 3 is a schematic diagram of the gas collecting pipe structure of the utility model applied in the anti-clogging device of the drill hole protection wall of the soft coal seam drainage.

Fig. 4 is a schematic diagram of the structure of the binding pipe joint used in the anti-clogging device of the drill hole protection wall of the soft coal seam drainage of the utility model.

Fig. 5 is a schematic diagram of the structure of the drainage pipe of the utility model applied to the anti-clogging device of the drill hole protection wall in the extraction of soft coal seam.

Reference signs include:

1-anti-blocking support end, 11-end pipe plug, 12-guiding head, 13-support rod, 2-collecting pipe, 21-collecting pipe main body, 22-inner head section of air collecting pipe, 23-external thread of air collecting pipe , 24-air collection hole, 25-the first binding ring, 3-binding pipe joint, 31-pipe joint main body, 32-pipe joint main internal thread, 33-second binding ring, 4-extraction pipe, 41-extraction Pipe main body, 42-extraction pipe external thread, 43-extraction pipe internal thread, 5-breathable tarpaulin, 6-blocking section.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

Example 1

As shown in Figures 1 to 5, this embodiment proposes an anti-clogging device for drilling holes in soft coal seam extraction, which is used for inserting into extraction holes in soft coal seams, and is applied to the protection wall protection for drilling holes in soft coal seams. The blockage device includes an anti-blocking support end 1, an air collecting pipe 2, a binding pipe section 3, a drainage pipe 4 and a breathable tarpaulin 5, wherein the air collecting pipe 2, the binding pipe section 3 and the exhausting pipe 4 are connected in sequence, and the air collecting pipe 2 The surface of the main body is densely covered with gas-collecting holes 24, and the anti-blocking support end 1 is blocked at the free end of the air collecting pipe 2. The anti-blocking support end 1 includes a guide head 12 located at the head, and the guide head 12 is provided with a number of supports distributed at equal intervals. The rod 13 and the air-permeable tarpaulin 5 are connected to the tail of the support rod 13 and the gas collecting pipe 2, so that the air-permeable tarpaulin 5 wraps the air collecting pipe 2 to realize ventilation and block cinder particles.

As shown in Figure 1, the anti-blocking support end 1, the gas collecting pipe 2, the restraining pipe section 3 and the exhaust pipe 4 are connected one by one.

As shown in Figure 2, the head of the anti-blocking support terminal 1 is provided with a semicircular guide head 12, the plane end surface of the guide head 12 is connected to the head of the end pipe plug 11, and the support rod 13 is connected to the guide head 12. The arc-shaped wall of the air-permeable tarpaulin 5 is connected on the support rod 13.

As shown in Figure 3, the air collecting pipe 2 includes the air collecting pipe main body 21, the inner head section 22 of the air collecting pipe, the outer thread 23 of the air collecting pipe and the first binding ring 25, wherein the surface of the air collecting pipe main body 21 is densely covered with air collecting holes 24, and the inner head section of the air collecting pipe 22 is used for docking with the end pipe plug 11 , the end of the first binding ring 25 has the external thread 23 of the air collecting pipe, and the first binding ring 25 is arranged at the transition position between the external thread 23 of the air collecting pipe and the main body 21 of the air collecting pipe. Wherein the first binding ring 25 is an annular raised structure.

As shown in FIG. 4 , the binding pipe joint 3 includes a tubular joint body 31 , the inner wall of the head section of the pipe joint main body 31 is provided with a second binding ring 33 , and the inner wall of the main body of the pipe joint main body 31 is provided with a pipe joint main body internal thread 32 . Wherein the second binding ring 33 is an annular raised structure.

As shown in Figure 5, the extraction pipe 4 comprises an extraction pipe main body 41, the front section of the outer wall of the extraction pipe main body 41 is provided with an extraction pipe external thread 42, and the tail end of the extraction pipe main body 41 inner wall is provided with an extraction pipe internal thread 43, the internal thread 43 of the exhaust pipe is threadedly connected with the external air extraction device.

In this embodiment, the head portion of the inner wall of the binding pipe section 3 is provided with a second binding ring 33, and the outer wall of the tail of the gas collecting pipe 2 is provided with a first binding ring 25, and the binding pipe section 3 and the gas collecting pipe 2 pass through the second binding ring 33 and The first binding ring 25 is fixedly inserted, and the air-permeable tarpaulin 5 is fixed at the junction of the second binding ring 33 and the first binding ring 25, which is convenient for fixing the air-permeable tarpaulin 5.

In this embodiment, the binding pipe section 3 and the extraction pipe 4 are connected by threads.

The end section of the drainage pipe 4 is arranged at the orifice plugging end position of the drainage borehole corresponding to the soft coal seam. There are a plurality of extraction pipes 4, and the plurality of extraction pipes 4 can be docked one by one.

The anti-blocking support terminal 1 includes a terminal pipe plug 11, which is closed and inserted in the head of the air collecting pipe 2, and the surface of the terminal pipe plug 11 is densely covered with ventilation holes to enhance the ventilation effect.

Example 2

A method for sealing a borehole retaining wall applied to the extraction of soft coal seams, using the anti-clogging device applied to the extracting borehole retaining walls of soft coal seams in embodiment 1, comprising the following steps,

Step 1. Fix one end of the breathable tarpaulin 5 on the anti-blocking support end 1 before sealing the hole;

Step 2. Insert the anti-blocking support end 1 into the top of the air collecting pipe 2, and then wrap the other end of the breathable tarpaulin 5 around the tail of the air collecting pipe 2;

Step 3, connect the air collecting pipe 2 and the binding pipe section 3, fix the end of the breathable tarpaulin 5 at the joint between the air collecting pipe 2 and the binding pipe section 3, and wrap the air collecting pipe 2 with the air collecting hole 24 with the breathable tarpaulin 5;

Step 4. After the drainage pipe 4 is placed, drag the drainage pipe 4 to the outside of the hole for a certain distance, and the dragging distance is not greater than the length of the main body of the anti-blocking support end 1;

Step 5, using the plugging material to plug the gap between the inner wall of the soft coal seam drainage borehole and the outer wall of the drainage pipe 4 to form a plugging section 6, and the hole sealing is completed.

In this embodiment, the air-permeable tarpaulin 5 is fixed at the matching position between the second binding ring 33 and the first binding ring 25 .

This device is applied to the anti-clogging device and sealing method of the drilling wall in the extraction of soft coal seams. It has novel structure, simple operation, high reliability and low cost, and can effectively increase the effective extraction time of the drilling and improve the extraction efficiency of the drilling. Effect. It can increase the effective extraction time of the borehole and improve the extraction effect of the borehole. At the same time, the utility model is suitable for pressure measurement drilling, especially for soft coal seams.

The above content is only a preferred embodiment of the present utility model, for those of ordinary skill in the art, according to the idea of the present utility model, many changes can be made in the specific implementation and application scope, as long as these changes do not depart from the scope of the present utility model Design, all belong to the protection domain of the present utility model.

Claims (6)

1. one kind is applied to weak seam extraction borehole retaining wall preventing clogging up device, for being inserted into weak seam extraction borehole, It is characterized by: being applied to weak seam extraction borehole retaining wall preventing clogging up device includes anti-blocking support end, gas collecting tube, constraint pipe Section, releasing pipe and ventilative tarpaulin, wherein gas collecting tube, constraint tube coupling and releasing pipe successively finish up connection, the body surfaces of gas collecting tube Gather gas collection hole, and for the anti-blocking support faces end head plugging in the free terminal of gas collecting tube, the anti-blocking support end includes being located at head The guide head in portion, guide head are equipped with several support rods being spacedly distributed, and the ventilative tarpaulin is connected to support rod and gas collecting tube It realizes ventilative and obstructs coal slag granules object so that ventilative tarpaulin wraps up gas collecting tube in tail portion.

2. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described The head for fettering tube coupling inner wall is equipped with the second constraint circle, and gas collecting tube tail portion outer wall is equipped with the first constraint circle, the constraint pipe Section and gas collecting tube pass through the second constraint circle and the first constraint encloses and cooperates fixed grafting, and the ventilative tarpaulin is fixed on the second constraint circle With the junction of the first constraint circle.

3. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described Constraint tube coupling and releasing pipe are connected through a screw thread.

4. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described The port closing end position of corresponding weak seam extraction borehole is arranged in releasing pipe latter end.

5. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described Anti-blocking support end includes end pipe close, the closed head for being inserted into gas collecting tube of end pipe close, the end pipe close table Gather ventilative hole in face.

6. according to claim 1 be applied to weak seam extraction borehole retaining wall preventing clogging up device, it is characterised in that: described Releasing pipe has multiple, and multiple releasing pipes can finish up docking one by one.