A kind of mining hole packer and method for sealingTechnical field
The present invention relates to all kinds of extraction drilling and sealing of mine field, be specifically related to a kind of mining hole packer and method for sealing。
Background technology
Mining hole packer, is called for short hole packer, is mainly used in all kinds of extraction of the mine tight sealing of hole of boring。Traditional sealing of hole product makes to be made up of polyurethane, woven bag, four points of iron pipes, four bulb separation valves etc., its hole-sealing technology is on-the-spot by mixed for 1:1 two kinds of polyurethane loading woven bag, send into four points of iron pipes and in hole, specify position near position and aperture, and will use as Grouting Pipe and slurry recovering tube in four points of iron pipe ostiums, after polyurethane fully reacts and expands, start slip casting, controlled flow and the guarantor's slurry that dams by four bulb separation valves。
When traditional sealing of hole product adopts polyurethane sealing of hole, two kinds of polyurethane have reacted hot, when loading woven bag and sending in hole, seepage is serious, and the positions such as the skin of operator, eyes have damage and contaminated environment, and meet hole internal water accumulation serious time, to hole under particularly, polyurethane sealing of hole lost efficacy substantially；
Traditional mining hole packer grouting pressure controllability is poor, and sealing material assembly is scattered, not readily transportable carries and sealing of hole, and traditional mining hole packer adopts polyurethane sealing aperture member hole-sealing technology complicated。
Summary of the invention
The mining hole packer of one that the present invention proposes, it is possible to resolve under in boring and hole, have the sealing of hole difficult problem of water burst drilling holes, improve drilling and sealing quality and extracting result。
For achieving the above object, present invention employs techniques below scheme:
A kind of mining hole packer, including extraction sleeve pipe and Grouting Pipe, extraction sleeve pipe is arranged on the pre-sealing of hole section of gas drainage pipe, a pouch is overlapped at the both ends of described extraction sleeve pipe respectively, Grouting Pipe is fixed on extraction sleeve pipe through two pouches, the endcapped of Grouting Pipe, described Grouting Pipe position section in pouch arranges check valve, and Grouting Pipe position section between two pouches are outer arranges explosive valve。
Further, also including slurry recovering tube, slurry recovering tube is fixed on extraction sleeve pipe, and one end is arranged on outside hole, and the other end connects with in hole。
Further, described Grouting Pipe position section in the pouch in hole arranges two check valves, arranges a check valve in the position section in the pouch in aperture。
Further, it is connected by snap joint between described Grouting Pipe and grouting pump。
A kind of method for sealing, comprises the following steps:
1), slip casting prepares；
Namely select hole packer product and the gas drainage pipe of dimension model according to pass, and check whether excellent；Connecting grouting pump, agitator, whether idle running inspection grouting pump, agitator be working properly, and whether checking Pressure gauge is intact, checks in agitator to have foreign material, gets out injecting paste material in the desired amount, checks that injecting paste material is intact, without hardening caking phenomenon。
2), pouch at the bottom of hole is installed with fixing；
According to hole sealing depth requirement, pouch bottom hole being enclosed within off-the-shelf extraction sleeve pipe, pouch two ends are fastened on extraction sleeve pipe；
3), explosive valve is installed with fixing；
The explosive valve at pouch rear at the bottom of hole is fixed on releasing pipe；
4), hole-sealing grouting sebific duct is fixed；
Connecting extraction sleeve pipe in order and progressively pushed to by hole packer and require position in hole, every 2 meters of Grouting Pipe is fixed on sealing of hole sleeve pipe with iron wire or wide adhesive tape；
5), fixed orifice pouch；
Aperture the pouch snap joint got ready and long Grouting Pipe are attached, and aperture pouch is fixed on the releasing pipe of aperture, and push in boring；
6), orifice sleeve is fixed；
Aperture extraction is overlapped effective iron wire and is fixed on the support material near boring, the PE Grouting Pipe in the pouch of aperture is connected with to grouting pump outlet Grouting Pipe, grouting operation can be carried out；
7), injection slurry proportioning；
Injection slurry is allocated in the ratio of the ratio of mud 0.8: 1 in agitator；Described injection slurry is inorganic sealing hole material；
Described inorganic sealing hole material itself has compactness, and can form the coalition of densification between the wall of a borehole to block crack。Have the characteristics that
Density little (being about the 1/3 of ordinary cement), light weight。
Sealing material has good plasticity and permeability and the good prevented from caking of instant capacity, can enter minute fissure under slip casing by pressure；
Sealing material comprcssive strength is higher, and intensity has sustainable growth characteristic, and prolongation over time, intensity gradually steps up；
Sealing material setting rate is fast, has dilatancy, effectively enhance sealing effectiveness after solidification。
Sealing material inject hole packer two ends pouch after, under pressure, can to a certain extent by the hole of pouch by inject serosity moisture leach, with reach multiviscosisty serosity make its accelerate solidification。Material in pouch can airtight continuous pressure, make the pouch of expansion have rapidly some strength and reach the effect of sealing；
8), grouting operation；
8.1) confirming that above preparation starts grouting pump after errorless；
8.2) slip casting start rear operator take quarter note observe Pressure gauge change in value situation；
8.3), after rupture disk is opened, continue slip casting and block the interstitial hole section of two pouches；
8.4) slip casting terminates and cleans；Fill with pressure after need first by grouting pump pressure release, then remove Grouting Pipe connecting tube, and aperture Grouting Pipe is bent closure process, now whole process is end。
Further, described step 1) in verify that manometric method is take the PE pipe of appropriate length, one end connects the pump other end and rolls over, and pumps into clear water and sees that Pressure gauge is with or without numerical value。
Further, described step 2) also include pouch two ends iron wire and be fastened on releasing pipe, and iron wire need to be fastened on the inner side of pouch opening, exports in a down-to-earth manner by pouch two, and iron wire stubble to be looped process。
Further, described step 5) in also include being attached aperture pouch by the snap joint got ready and Grouting Pipe after, twitch seam back and forth and determine and firmly install, the switch notch of the main snap joint of card of looping with iron wire。
Further, described step 7) in be additionally included in the process in allotment serosity and slip casting process and need not stop stirring。
Further, described step 8.1) in also include start slip casting time grouting pump intake valve handle control at 1/1st to two/3rd place opening stroke。
As shown from the above technical solution, the mining hole packer of the present invention and method for sealing have the advantages that
(1) sealing of hole operation automatization；After hole packer sends into boring, only need to start grouting pump can realize whole drilling and sealing process automation mechanized operation, solves the sealing quality instability problem brought because manual operation is lack of standardization, can alleviate the labor intensity of workman simultaneously, raise labour efficiency。
(2) high-pressure slip-casting is realized；After hole packer two ends pouch sealing of hole completes, it can bear the pressure of 3.0Mpa, and when therefore continuing that central bore is adopted high-pressure slip-casting, two ends pouch will not be breakdown, and the cement grout of 3.0Mpa can be made effectively to block coal (rock) the slabbing gap around the wall of a borehole。
(3) after matching used mining inorganic sealing hole material solidification, there is certain dilatancy, the shrinkage crack produced after theing cement solidifies can be stopped, solve tradition hole packer two ends and adopt polyurethane closure, not only complex process, and it is not high pressure resistant to block end, when carrying out high-pressure slip-casting, it is easy to cause two ends to be broken down by high-voltage and cause sealing of hole failure。
(4) sealed borehole length is adjustable, and hole packer length can require freely to regulate according to down-hole drilling sealing of hole section, when solving employing polyurethane as plug, and the problem that sealing of hole segment length was limited by the powder stick response time。
(5) saving sealing of hole expense, the closure of the mining hole packer of the present invention and traditional polyurethane adds water can save Master Cost 25% compared with silt particle hole-sealing technology。
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described:
As shown in Figure 1, mining hole packer described in the present embodiment one, including extraction sleeve pipe 2 and Grouting Pipe 3, extraction sleeve pipe 2 is arranged on the pre-sealing of hole section of gas drainage pipe 1, described extraction sleeve pipe 2 is near the sheathed aperture pouch 4 of orifice end, in pouch 5 at the bottom of a sheathed hole, bottom, hole, Grouting Pipe 3 is fixed on extraction sleeve pipe 2 through pouch 5 at the bottom of aperture pouch 4 and hole, the endcapped of Grouting Pipe 3, Grouting Pipe 3 arranges check valve 6 in the position section in pouch 5 in aperture pouch 4 and at the bottom of hole, Grouting Pipe 3 arranges explosive valve 7 in the position section between pouch at the bottom of aperture pouch 4 and hole 5 is outer。
Also including slurry recovering tube 8, slurry recovering tube 8 is fixed on extraction sleeve pipe 2, and one end is arranged on outside hole, and the other end connects with in hole。
The described Grouting Pipe 3 position section in pouch at the bottom of hole 5 arranges two check valves 6, and the position section in aperture pouch 4 arranges a check valve 6。
Pass through to arrange snap joint 9 between described Grouting Pipe 3 and grouting pump to be connected。
The following is the method for sealing that above-mentioned hole packer is corresponding:
(1) slip casting prepares
Select hole packer product and the gas drainage pipe 1 of dimension model according to pass, and check whether excellent。
Connect grouting pump, agitator, whether idle running inspection grouting pump, agitator be working properly, checking Pressure gauge whether intact (diaphragm of value scope 0～6MPa should be selected), the method of inspection: take the PE pipe of appropriate length, one end connects the pump other end and rolls over, and pumps into clear water and sees that Pressure gauge is with or without numerical value。Check in agitator to have the foreign material such as blinding, coal cinder, solidified water clod, it is prevented that blocking grouting pipeline, cause sealing of hole failure。Get out injecting paste material in the desired amount, note checking that injecting paste material is intact, without hardening caking phenomenon, otherwise, should stop using。
(2) pouch 5 at the bottom of hole is installed with fixing
According to hole sealing depth requirement, pouch 5 bottom hole packer hole is enclosed within off-the-shelf PVC plastic glue extraction sleeve pipe 2, pouch two ends iron wire (suggestion uses No. 14 iron wires) is fastened on extraction sleeve pipe 5, it is characterized by iron wire and need to be fastened on the inner side of pouch opening, export in a down-to-earth manner by pouch two, iron wire stubble to be looped process, in case pouch is punctured in the process expanded, it is prevented that pouch is slided when being delivered into boring or comes off。
(3) explosive valve 7 is installed with fixing
Explosion 7 valve at pouch at the bottom of hole 5 rear is fixed on PVC extraction sleeve pipe 2, and take off protection set, note explosive valve 7 circular open direction during fastening, so as not to wear pass through journey is blocked and hinders explosive valve 7 to open time serosity outflow。
(4) hole-sealing grouting pipe 3 is fixed
Connecting PVC extraction sleeve pipe 2 in order and progressively pushed to by hole packer and require position in hole, every 2 meters of Grouting Pipe 3 is fixed on sealing of hole sleeve pipe 2 with iron wire or wide adhesive tape, it is prevented that in boring procedure of making a gift to someone, Grouting Pipe 3 swings back and forth。
(5) fixed orifice pouch 4
Aperture pouch 4 snap joint 9 got ready is attached with long PE Grouting Pipe 3, twitch after seam determines and firmly install back and forth, loop the switch notch of the main snap joint of card 9 in case pressure is excessive during slip casting washes open with iron wire, and aperture pouch 4 is fixed on aperture extraction sleeve pipe 2 by pouch fastening means, and push in boring。
(6) aperture extraction sleeve pipe 2 is fixed
Aperture extraction sleeve pipe 2 iron wire is fixed on the support material near boring, the PE Grouting Pipe 3 in aperture pouch 4 is exported Grouting Pipe with grouting pump and is connected, grouting operation can be carried out。
(7) injection slurry proportioning
In agitator, allocate injection slurry by the ratio of the ratio of mud 0.8: 1 (water is 0.8, and ash is 1), the process in allotment serosity and slip casting process needs do not stop stirring, in order to avoid grout cures。
Described inorganic sealing hole material itself has compactness, and can form the coalition of densification between the wall of a borehole to block crack。
Have the following characteristics that
Density little (being about the 1/3 of ordinary cement), light weight。Labor intensity during underground transportation can be reduced, and reduce use cost；Sealing material has good plasticity and permeability and the good prevented from caking of instant capacity, can enter minute fissure under slip casing by pressure；Sealing material comprcssive strength is higher, and intensity has sustainable growth characteristic, and prolongation over time, intensity gradually steps up；
Sealing material setting rate is fast, has dilatancy, effectively enhance sealing effectiveness after solidification。
Sealing material inject hole packer two ends pouch after, under pressure, can to a certain extent by the hole of pouch by inject serosity moisture leach, with reach multiviscosisty serosity make its accelerate solidification。Material in pouch can airtight continuous pressure, make the pouch of expansion have rapidly some strength and reach the effect of sealing。
(8) grouting operation
(8.1) confirming that above preparation starts grouting pump after errorless, starting slip casting hourly velocity should not be too fast, and grouting pump intake valve handle general control is at 1/1st to two/3rd place opening stroke。
(8.2) slip casting start rear operator take quarter note observe Pressure gauge change in value situation (this is very crucial, the change direct reaction slip casting situation of Pressure gauge numerical value, it is analyze the foundation of every situation in hole), do not fill front grouting pressure with pressure in pouch and be generally not more than 0.6MPa, when pouch is about to fill, pressure can rapidly increase to explosive valve 7 about setup pressure value 2.0MPa, moment after rupture disk explosion, force value understands dramatic decrease and close to 0, illustrates that rupture disk is normally opened。
(8.3) after rupture disk is opened, continuing slip casting and block the interstitial hole section of two pouches, this hourly velocity can properly increase；Upward hole sealing of hole, after slip casting, rupture disk is opened rear slurry recovering tube 8 and quickly can be returned slurry, now needs slurry recovering tube 8 is carried out bending closure process；Lower to hole sealing of hole, rupture disk is opened, and continues the interstitial hole section two pouches and carries out slip casting, and when slurry occurs returning in slurry recovering tube 8, typical time after about 15 to 20 minutes (by aperture isThe boring that sealed borehole length is 25 meters calculates), slurry recovering tube 8 is bent block in time。
When interlude is about to fill, Pressure gauge numerical value can continue to rise, slip casting is stopped when rising to (1.2～1.5) MPa, observe pressure value situation, normal condition should be rear pressure value with pressure and is held essentially constant, if pressure can not keep, then illustrate to fail to fill, slip casting need to be continued to attempt to until filling and keeping with pressure。
More than operation is upward hole mode of operation, if it is lower to hole and the hole-sealing grouting having hydrops, then need to being inserted into 4 at big releasing pipe to be in charge of at the bottom of hole, more than being used in the hole that will accomplish fluently, water and dregs blow out, and can load hole packer and carry out blowing water process after slip casting completes again after the remaining water of blowout and dregs。
(8.4) slip casting terminates and cleans
Fill with pressure after need first by grouting pump pressure release, then remove Grouting Pipe 3 connecting tube, and aperture Grouting Pipe 3 is bent closure process, now whole process is end。Slip casting needs to clean in time grouting pump after completing, and is disassembled by diaphragm, is carried out, it is prevented that have the accuracy of injecting paste material remaining influence table, reinstall after having cleaned in the hole of his-and-hers watches body bottom。In agitator, residue injecting paste material should carry out processing and cleaning up, it is prevented that the granule of caking is blocking grouting pump or Grouting Pipe 3 when slip casting next time。
Embodiment described above is only that the preferred embodiment of the present invention is described; not the scope of the present invention is defined; under the premise designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall within the scope of protection of the present invention。