CN213016286U

CN213016286U - Grouting back-drainage water seal hole device

Info

Publication number: CN213016286U
Application number: CN202021840435.4U
Authority: CN
Inventors: 谢明朝
Original assignee: Guizhou Creates Prosperous Science And Technology Co ltd
Current assignee: Guizhou Creates Prosperous Science And Technology Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-20
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a grouting backflow water sealing hole device, which comprises a grouting pipe, an extraction pipe, a water return pipe, 2 terylene filter bags and a terylene cloth filter drum sleeved at the front part of the water return pipe, wherein the grouting pipe, the extraction pipe and the water return pipe are arranged in parallel and are all arranged in the terylene filter bags in a penetrating way; two PVC hoses are sleeved on the grouting pipes among the 2 polyester filter bags, and a plurality of drain holes are uniformly distributed on the part of the return pipe in the polyester fabric filter cylinder. The grouting pump is adopted for pressurizing grouting, and the excess water and air are filtered and discharged, so that the phenomenon that the excess water and the air are left in the hole to be dried and then later hollow is avoided, viscous high-concentration cement slurry is left in the hole, the hole is filled and sealed, and the coal rock gap around the hole can be extruded, filled and plugged; the method meets the coal mine safety operation standard, and greatly improves the coal seam gas extraction concentration. The method has the advantages of low hole sealing cost, low labor intensity, reduced staff, improved hole sealing quality, flexible hole sealing length and high safety factor.

Description

Grouting back-drainage water seal hole device

Technical Field

The utility model relates to a coal mining technical field, concretely relates to slip casting is flowback water seal hole ware.

Background

The technology of sealing gas extraction holes in the coal seam of the coal mine is relatively laggard at present, and most coal mine gas drill holes are not tightly sealed, so that gas leakage is relatively serious. The coal mine tunnel is full of gas, so that the gas concentration pumped by a gas drainage pump is low, the pumping time is too long, the mining imbalance is caused, the coal face cannot be replaced, the great loss is caused, the concentration of the recovered gas is low, the concentration requirement of gas power generation is difficult to meet, the hole sealing time is long, the working efficiency is low, the comprehensive cost is high, and the like.

SUMMERY OF THE UTILITY MODEL

The technical insufficiency to the existence, the utility model aims at providing a low in production cost, sealing performance is good, factor of safety is high and work efficiency is high slip casting flow back water seal hole ware.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a grouting backflow water sealing hole device, which comprises a grouting pipe, an extraction pipe, a water return pipe, 2 terylene filter bags and a terylene cloth filter drum sleeved at the front part of the water return pipe, wherein the grouting pipe, the extraction pipe and the water return pipe are arranged in parallel and are all arranged in the terylene filter bags in a penetrating way; the tail end of the grouting pipe is provided with a quick-release joint, and the front ends of the grouting pipe and the water return pipe are provided with rubber plugs; two PVC (polyvinyl chloride) hoses are sleeved on the grouting pipes positioned between the 2 polyester filter bags, grouting holes are respectively arranged on the grouting pipes positioned in the two PVC hoses, and the center distance between the two grouting holes is 1 meter; the grouting pipes positioned in the terylene filter bag are respectively provided with a grouting hole; the two ends of the PVC hose are sealed and fixed with the grouting pipe through an aluminum alloy pipe hoop, the two ends of the terylene filter bag are sealed and fixed with the drainage pipe and the water return pipe through the aluminum alloy pipe hoop, the two ends of the terylene cloth filter cylinder are sealed and fixed with the water return pipe through the aluminum alloy pipe hoop, and a plurality of drain holes are uniformly distributed on the water return pipe in the terylene cloth filter cylinder.

Preferably, the grouting pipe is an antistatic flame-retardant black PE pipe with the diameter of 16 mm; the length of the terylene filter bag is 900mm, and the diameter is 160 mm; the diameter of the grouting hole is 8mm, and the diameter of the drain hole is 6 mm.

Preferably, the length of the grouting pipe is 3-20 meters, the matched diameter is 160mmx900mm length according to the size of a drilled hole and the length of a hole sealing of a coal mine, the hole sealing extraction pipe with a filtering cloth cylinder is sleeved on a double-layer filtering cloth bag and a pipe body with two ends of 600 meshes by densely drilling holes of 6mm, and a PVC hose and a DN16 quick-connection tightening joint of a grouting opening are sleeved on the grouting pipe in the middle section of the hole sealing device.

Preferably, the two ends of each grouting pipe with the length of 3 meters are provided with inner and outer screw threads or plug-in type flaring, so that a plurality of grouting pipes with the length of 3 meters can be conveniently spliced; after the antistatic flame-retardant PE pipe is punched, a cloth tube with a passing rate of more than 600 meshes is sleeved, the passing rate of the cloth tube is far larger than about 200 meshes of cement, cement and fly ash thick slurry can be left in the drilled holes in the middle sections of the filter bags at the front end and the rear end, and water is filtered into the extraction pipe from the cloth tube through the pressurization of the grouting pump and then is discharged. The increasing filling of high-concentration cement slurry accelerates the expansion of the expansion filter bag to be thickened, outwards extrudes the drill hole to seal the hole wall, inwards and outwards extrudes the slurry to expand the hole wall to be sealed, so that the aim of sealing the filter bag by two plugs is fulfilled, and the maximum expansion diameter of the filter bag is 160 mm.

Preferably, the grouting pressure that the grouting pipe can bear is 2MPa, and the highest breakage pressure is 3.0 MPa; the grouting and hole sealing device is suitable for 1.5-2.5 MPa electric and pneumatic grouting pumps which are commonly adopted in the current coal mines for grouting and hole sealing.

Preferably, the expansion bursting pressure of the PVC hose is 1.2-1.5MPa, and when the grouting pump is used for filling the filter bag grout at the front end and the rear end of the drilled hole and the extraction pipe, the grout can break breaking valves made of PVC short sections at the middle sections under the pressurization of the grouting pump to fill the hollow cores at the middle sections of the two sealed filter bags in a grouting manner.

Preferably, the pitch of the drain holes is 10 mm.

The beneficial effects of the utility model reside in that: the grouting pump is adopted for pressurizing grouting and filtering to discharge more water and air, the phenomenon that the more water and the air are left in the hole and then the later half hollow is caused is avoided, viscous high-concentration cement slurry is left in the drill hole and is used for filling and sealing the drill hole, and the purpose of extruding, filling and plugging coal rock gaps at the periphery of the drill hole is achieved; the coal mine gas sealing device accords with coal mine safety operation, and greatly improves coal seam gas extraction concentration over any gas sealing product used in the current coal mine. The method has the advantages of low hole sealing cost, low labor intensity, reduced staff, improved hole sealing quality, flexible hole sealing length and high safety factor.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a grouting backflow water seal hole sealing device provided by an embodiment of the present invention.

Description of reference numerals:

the device comprises a Dacron filter bag 1, a PVC hose 2, a Dacron cloth filter cylinder 3, a grouting pipe 4, a grouting hole 5, an aluminum alloy pipe hoop 6, a rubber plug 7, an extraction pipe 8, a drainage hole 9, a drainage hole 10, a locking type grouting quick connector and a water return pipe 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the grouting backflow water hole sealing device comprises two dacron filter bags 1 with the diameter of 160mm and the length of 900mm, a grouting pipe 4, an extraction pipe 8 and a backflow pipe 11 are arranged in parallel and are all arranged in the dacron filter bags 1 in a penetrating mode, two sections of PVC hoses 2 are fastened on the grouting pipe 4 in the middle of the two dacron filter bags 1 at intervals of 1 meter to form an explosion valve, a grouting hole 5 with the diameter of 8mm is drilled in the grouting pipe in the middle of the explosion valve, and two ends of each PVC hose are fixedly sealed with the grouting pipe through aluminum alloy pipe hoops; the tail end of the grouting pipe 4 is connected with a locking type grouting quick-plugging connector 10; rubber stoppers 7 are arranged at the front ends of the grouting pipe 4 and the water return pipe 11 to prevent the slurry from streaming from the front end; the grouting pipe 4 is provided with a grouting hole 5 with the diameter of 8mm in the middle of the two terylene filter bags 1; the extraction pipe 8 penetrates through the middle of the terylene filter bag 1, and the terylene filter bag 1 is fixed on the pipe body of the extraction pipe 8 by a non-setting adhesive tape; two ends of the terylene filter bag 1 are sealed and fixed with the grouting pipe 4, the extraction pipe 8 and the water return pipe 11 through an aluminum alloy pipe hoop 6, and a plurality of drain holes 9 are uniformly distributed on the part of the water return pipe positioned in the terylene cloth filter cylinder 3.

After underground drilling is finished, bundling and helping a 'grouting return water seal hole device' on an extraction sealing pipe to insert into a drill hole, reserving a tail end locking quick-insertion joint to be connected with a grouting pipe on a grouting pump, starting the grouting pump to perform grouting, expanding and plugging a front and a rear sealed terylene filter bags when grout enters the two terylene filter bags for grouting, and breaking a middle PVC hose to perform grouting to the middle section when grouting pressure reaches or exceeds 1.2-1.5 MP; any one of the two PVC hoses at the middle section can burst, when the PVC hose bursts, a pressure gauge on the grouting pump can be reduced to 0-0.1 MPa from about 1.2-1.5MPa, and a large amount of water is filtered out from a water return pipe through the grouting pressure under the condition that the grouting pump continues grouting and the pressure gauge slowly increases pressure, so that the concentration of cement slurry in the hole is improved, and high-concentration cement slurry continuously permeates into coal rock peripheral gaps in the drill hole to block a gas leakage channel, and the possibility of outward gas leakage is prevented; when the grouting pressure reaches 1.6 MPa-2 MPa, the grouting and hole sealing work can be finished. At this time, the whole hole sealing section and the coal rock gap at the periphery are completely filled and compacted by high-concentration cement slurry.

The utility model discloses mainly used colliery is gas drilling hole sealing in pit can improve hole sealing thick liquid concentration and reach solid core hole sealing, the institute thick liquid of pouring out the clear water discharge hole outside filter out, stay the high concentration thick liquid in the drilling continuous extrude the interior circumference coal petrography gap of drilling, plug up the gas leakage passageway high concentration thick liquid under the pressurization of grouting pump. The stability of the coal rock layer is also reinforced by filling cement paste. The support of tunnel has been improved, has prevented that the tunnel from warping, has prevented coal seam spontaneous combustion, has prevented rock burst, has prevented that the roof board of tunnel comes to press protruding suddenly and the possibility that coal and gas are outstanding.

The terylene cloth filter cartridge is sleeved on the water return pipe in a punching way, so that redundant water can be filtered out during grouting, the concentration of the injected slurry is improved to reach solid core hole sealing, and the phenomenon of semi-hollow core after the cement slurry in the middle section is dried is avoided; the burst valve made of two sections of PVC hoses is arranged on the middle section grouting pipe, so that any burst valve in the middle section can be effectively burst to open for grouting after the filtering cloth bags at the two ends are fully filled with the grout and the drilling holes are fully expanded and sealed, the possibility that the burst valves at the two ends, which are not exploded, of the middle section are fully sealed and blocked by expansion of the filtering bag at the two sides is prevented from grouting the middle section, and the possibility that the front end cloth bag is scrapped to be drilled by overpressure of grouting pressure is avoided.

The utility model discloses can solve when present colliery slip casting hole sealing grout contracts half hollow phenomenon after doing and appear sealing the problem that the not dead drilling caused gas leakage and improved not high gas and take out concentration and take out the extraction negative pressure.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The grouting back-drainage water hole sealing device is characterized by comprising a grouting pipe, an extraction pipe, a water return pipe, 2 terylene filter bags and a terylene cloth filter cylinder sleeved at the front part of the water return pipe, wherein the grouting pipe, the extraction pipe and the water return pipe are arranged in parallel and are all arranged in the terylene filter bags in a penetrating manner; the tail end of the grouting pipe is provided with a quick-release joint, and the front ends of the grouting pipe and the water return pipe are provided with rubber plugs; two PVC (polyvinyl chloride) hoses are sleeved on the grouting pipes positioned between the 2 polyester filter bags, grouting holes are respectively arranged on the grouting pipes positioned in the two PVC hoses, and the center distance between the two grouting holes is 1 meter; the grouting pipes positioned in the terylene filter bag are respectively provided with a grouting hole; the two ends of the PVC hose are sealed and fixed with the grouting pipe through an aluminum alloy pipe hoop, the two ends of the terylene filter bag are sealed and fixed with the drainage pipe and the water return pipe through the aluminum alloy pipe hoop, the two ends of the terylene cloth filter cylinder are sealed and fixed with the water return pipe through the aluminum alloy pipe hoop, and a plurality of drain holes are uniformly distributed on the water return pipe in the terylene cloth filter cylinder.

2. The grouting back-flow water hole sealing device according to claim 1, wherein the grouting pipe is an antistatic flame-retardant black PE pipe with a diameter of 16 mm; the length of the terylene filter bag is 900mm, and the diameter is 160 mm; the diameter of the grouting hole is 8mm, and the diameter of the drain hole is 6 mm.

3. The grouting back-flow water perforator of claim 2 wherein the length of the grouting pipe is 3-20 meters.

4. The grouting back-flow water seal hole device according to claim 3, wherein both ends of each grouting pipe with the length of 3 m are provided with inner and outer screw threads or insertion type flaring holes, so that a plurality of grouting pipes with the length of 3 m can be conveniently spliced.

5. The grouting back-flow water seal hole device according to any one of claims 1 to 4, wherein the grouting pipe can bear grouting pressure of 2MPa and the highest breakage pressure of 3.0 MPa.

6. The grouting back-flow water perforator of claim 1, wherein the PVC hose has an expansion burst pressure of 1.2-1.5 MPa.

7. The grouting back-drain water perforator of claim 1 wherein the pitch of said drain holes is 10 mm.