CN114809977A - Ultra-deep blast hole plugging device and method for upward blast hole and downward water flow - Google Patents
Ultra-deep blast hole plugging device and method for upward blast hole and downward water flow Download PDFInfo
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- 238000005422 blasting Methods 0.000 claims abstract description 40
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention discloses a plugging device and a plugging method for an ultra-deep blast hole with large downward water flow in an upward blast hole, wherein the plugging device comprises a grouting assembly, a rock body is provided with a plurality of ultra-deep blast holes, a hole sealing assembly is arranged in each ultra-deep blast hole, the grouting assembly is respectively communicated with the plurality of hole sealing assemblies, a water drainage part is fixed in each ultra-deep blast hole, one end of the water drainage part penetrates through the hole sealing assembly and is positioned in the ultra-deep blast hole, and the other end of the water drainage part is positioned outside the ultra-deep blast hole; the method comprises the following steps: confirming that the medicine in the drill hole is finished; step two: flushing the device and commissioning; step three: step four, preparing slurry: grouting the pre-cracked holes; step five: cleaning the device after grouting; step six: evacuating personnel and preparing for blasting; people are evacuated, the safety warning line is pulled up, the waiting time is 1h, and blasting work is carried out. The invention has simple structure and convenient operation, can block the ultra-deep blast hole according to the characteristics of the coal bed in western regions, and ensures the deep hole blasting effect.
Description
Technical Field
The invention relates to the technical field of coal mining engineering, in particular to an ultra-deep blast hole plugging device and method for large downward water flow from an upward blast hole.
Background
The mine roof separation water burst mainly refers to a plurality of separation spaces with different sizes generated by rock stratum separation formed by unsynchronized subsidence of coal bed overlying strata under the mining action due to the difference of soft and hard lithology along with the coal bed mining, vacuum negative pressure is formed in the spaces, water in an underground water-bearing layer is sucked into the separation spaces through the forms of lateral runoff supply, vertical seepage, cross-flow supply and the like to be collected, and separation layer water is formed. Once the separation water stored in the spaces is communicated with the overlying separation space along with the water guide crack zone (or the caving zone, the water guide fault and other water guide channels) formed after the coal seam is mined, the separation water body is caused to burst into the mine working face to cause the water inrush phenomenon of the mine, and meanwhile, the overlying rock mass and the separation water act on the hydraulic support together to easily cause water pressure frame disasters. Meanwhile, for the underground mining space and the mining activity of the mine, the phenomenon of water inrush from separated layer is also serious water damage from separated layer. When the water volume of the water accumulated in a certain separation space is larger, the probability of water gushing of the separation water is also larger, and the threat of water damage of the water gushing of the separation water is also larger. The western region has the advantages that the thickness of the coal seam is large, the water-rich property of the overlying strata is strong, the condition is provided for the occurrence of the bed separation water hazard of the thick hard roof, and the bed separation water hazard control of the water-rich thick hard roof under the condition of the extra-thick coal seam is the key of the safety production of the western mining area.
The main difficulty faced by mine exploitation in the western region is that soft western rock is easy to argillize, and is rock with low strength in a natural anhydrous state or under a dry condition, and once the soft western rock meets water, the rock is argillized, disintegrated and expanded, so that the surrounding rock is easy to deform, and even engineering accidents such as roof fall, collapse and the like occur; due to the characteristic that northwest rocks are transformed into cement when meeting water, the method for solving the separation layer water damage by punching and dewatering can not be realized; the method of interval type caving coal interval type caving is adopted to solve the problem of water damage of the abscission layer, the effect is not obvious, the phenomenon of multiple water discharge pressure frames still occurs in the mining process, and the supports are almost scattered when the working face is harvested. Aiming at western coal fully mechanized caving mining, the mining height is too large, the caving zone is too small, the goaf cannot be filled and filled fully, ultra-deep hole blasting is carried out on the coal seam roof to force roof caving, blasting damage is generated inside the roof, the roof is broken and falls along with coal seam mining, the separation space caused by uneven roof settlement is avoided, meanwhile, the height of the caving zone is increased by deep hole blasting, the goaf is filled and filled fully, the subsidence amount of the roof is reduced, and roof separation water damage is further effectively prevented.
The coal seam water-rich roof ultra-deep hole blasting is mainly characterized in that holes are drilled above a coal seam roof from a coal seam machine lane, an air lane or a cutting hole, the included angle between the blast hole direction and the horizontal direction is 40-89 degrees, the blast hole depth is 40-80 meters, the longest blast hole can reach 100 meters, the charge is relatively more for the ultra-deep hole with the large inclination angle, 100-200 kilograms of explosive is charged in one blast hole, in order to ensure the detonation of the explosive, the continuous charge of the explosive needs to be ensured, the blast hole is positioned on the water-rich roof, water in the roof can flow out of the blast hole, the outflow speed is higher, 1-2 cubic meters per hour, meanwhile, the roof mudstone in western regions has the characteristic of water-to-argillization, the traditional blast hole plugging is realized by realizing the complete plugging of the blast hole to increase the action time of explosive gas, but in the face of the large explosive amount, water flow and the characteristic of water-argillization of surrounding rocks, the weight of the explosive, water and mud slurry in the blast hole can be resisted when the complete stemming plugging is adopted, the self has great difficulty, and the complete plugging is easy to cause the water quantity in the blast hole to be large, so that the expansion and the mudjack of the surrounding rock are caused or the surrounding rock floats, the position of explosive in the blast hole is changed, the explosive charging is changed into the discontinuous explosive charging, and the problems of explosion rejection and the like are caused.
In summary, for blast holes with large downward water inflow amount from upward blast holes on a water-rich top plate, ordinary stemming is adopted for plugging, and the requirements are difficult to meet, so that an extra-deep blast hole plugging device and method for ensuring that the blast holes cannot be punched while the water is drained in the hole plugging process of the upward blast holes and the downward water is urgently needed, and the extra-deep hole blasting effect is ensured.
Disclosure of Invention
The invention aims to provide a plugging device and a plugging method for an ultra-deep blast hole with large water flow from an upward blast hole to a downward blast hole, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an ultra-deep blast hole plugging device for upward blast holes and downward water flow with large flow, which comprises a grouting assembly, wherein a plurality of ultra-deep blast holes are formed in a rock body, a hole sealing assembly is arranged in each ultra-deep blast hole, the grouting assembly is respectively communicated with the plurality of hole sealing assemblies, a water drainage part is fixed in each ultra-deep blast hole, one end of the water drainage part penetrates through the hole sealing assemblies and is positioned in the ultra-deep blast holes, and the other end of the water drainage part is positioned outside the ultra-deep blast holes.
Preferably, the hole sealing component comprises a hole sealing bag, and the hole sealing bag is a double bag.
Preferably, the size of the double-bag is 0.4-0.8m, and the size of the double-bag is preferably 0.6 m.
Preferably, the slip casting subassembly includes the slip casting pump, every the slip casting pipe all is installed in the ultra-deep blasting hole, first hole sealing bag is run through to slip casting pipe one end, two the hole sealing bag passes through the buckle with the slip casting pipe and is connected, the slip casting pipe other end is located outside the ultra-deep blasting hole and fixedly connected with are connect soon, there is the slip casting pipe through the reducing intercommunication on the slip casting pump any slip casting pipe in the ultra-deep blasting hole passes through connect soon with on the slip casting pump slip casting pipe intercommunication.
The grouting pipe in each hole sealing bag is communicated with a blasting valve, when the pressure of the grouting pipe reaches 1MPa, the blasting valve automatically explodes, slurry flows out of the blasting valve to fill the hole sealing bags, the grouting pipe is reserved between the two hole sealing bags, the blasting valve is arranged in the middle of the grouting pipe, when the pressure in the grouting pipe reaches 1.2MPa, the grouting pipe automatically explodes, the slurry is injected between the two hole sealing bags, and the holes between the two hole sealing bags are filled. The maximum bearing pressure of the hole sealing sac is 2.5 MPa.
Preferably, the water drainage part comprises a water drainage pipe, one end of the water drainage pipe penetrates through the hole sealing bag and is located in the ultra-deep blasting hole, the other end of the water drainage pipe is located outside the ultra-deep blasting hole and is fixedly communicated with a water drainage valve, and the length of the water drainage pipe conveyed into the blast hole is 20-40cm longer than that of the double-bag. The diameter of the water drain pipe is 10-16mm, the maximum water flow speed can reach 10m/s, and when the diameter of the blast hole is 94mm, the maximum water flow of the blast hole is 2m 3 And h, the maximum water flow speed in the blast hole is 0.8m/s, and when the diameter of the water drain pipe is 10mm after plugging and the maximum flow speed value of the water drain pipe reaches 7.08m/s, the accumulated water in the blast hole can completely permeate out.
Preferably, the maximum bearing pressure of the drain pipe is 6 MPa.
The method comprises the steps of feeding a drain pipe and a hole sealing assembly into a blast hole together, closing a drain valve, connecting a grouting pipe with a grouting pump, grouting into a hole sealing bag firstly, when the pressure in the hole sealing bag reaches 1MPa, bursting the hole sealing bag through the bursting valve, grouting into another hole sealing bag, when the pressure reaches 1.5MPa, opening a one-way valve between two hole sealing bags, grouting into the blast hole, when the integral grouting reaches 2MPa, pulling out the connection between a grouting pump and the grouting pipe, and grouting into the next ultra-deep blast hole. And simultaneously opening a drain valve to discharge rock water in the blast hole.
A method for plugging an ultra-deep blast hole with large water flow from an upward blast hole to a downward blast hole comprises the following steps,
the method comprises the following steps: after the charging in the ultra-deep blast hole is finished, confirming whether the charging in the ultra-deep blast hole is stable;
step two: a stirrer is arranged on one side of the grouting pump, the grouting pump and the stirrer are flushed by a water pipe, and the grouting pump and the stirrer are subjected to test operation;
step three: adding clear water and hole sealing materials into the stirrer to prepare slurry;
step four: installing a hole sealing bag and a water drain pipe, respectively communicating a grouting pipe on a grouting pump with a grouting pipe in the ultra-deep blasting hole, and performing grouting work;
step five: cleaning a grouting pump and a stirrer after grouting;
step six: the evacuation personnel are ready for blasting.
Preferably, step four includes, in step four,
4.1, selecting a specification of hole sealing bags according to needs to install, placing two hole sealing bags in an ultra-deep blast hole together with a water drain pipe in tandem, closing a water drain valve, connecting a grouting pipe with a grouting pump, fixing and communicating the grouting pipe with a blasting valve, wherein the blasting valve is respectively positioned in the two hole sealing bags and between the two hole sealing bags;
4.2, communicating a grouting pipe on a grouting pump with a grouting pipe in any ultra-deep blasting hole, starting the grouting pump, grouting in the inner hole sealing bag firstly, when the pressure in the inner hole sealing bag reaches 1MPa, bursting a blasting valve in the outer hole sealing bag to open, grouting in the outer hole sealing bag, when the pressure reaches 1.5MPa, opening the blasting valve between the two hole sealing bags, grouting in the ultra-deep blasting hole, when the overall grouting pressure reaches 2MPa, completing the ultra-deep blasting hole grouting, closing the grouting pump, and bending the grouting pipe and fastening by using a binding belt;
and 4.3, quickly connecting and communicating the grouting pipe on the grouting pump with another grouting pipe, and then grouting until all the ultra-deep blast holes finish grouting.
Preferably, in the third step, clean water is firstly added into the stirrer, and meanwhile, the hole sealing material is slowly added until the ratio of the clean water to the hole sealing material is 1: 1.
Preferably, in the fifth step, the slurry suction pump sucks clean water, and runs for 2-3 minutes at full speed, so that the main body of the slurry suction pump and the slurry suction pipe on the slurry suction pump are washed clean.
Preferably, in the fourth step, whether the pipeline of the grouting pipe is unobstructed or not is observed in the grouting process, and the reducing part of the interface is observed at the end point.
The invention discloses the following technical effects: according to the invention, the hole sealing assembly is arranged in the ultra-deep blast hole, slurry is injected into the ultra-deep blast hole, the water draining part can discharge excessive water in the ultra-deep blast hole, and cement slurry is left in the hole sealing assembly, so that the hole sealing assembly is in close contact with the inner wall of the ultra-deep blast hole, the ultra-deep blast hole is sealed after solidification, and the problems that the traditional stemming is easy to punch holes under large dosage and the traditional stemming with large flow rate to an upper blast hole cannot be sealed, the sealing effect is poor and the like are solved. The method can effectively solve the problems that when the fully mechanized coal mining coal seam is covered with the water-rich thick hard roof plate in the western region and is forcedly jacked, a large amount of ultra-deep holes are detonated without punching, and after the blast holes are plugged, the positions of explosives in the blast holes are changed due to expansion and mudification or floating of surrounding rocks caused by large water amount in the blast holes, so that explosive loading is changed into uncontinuous explosive loading to generate explosion rejection and the like. The problem of western region big, the difficult shutoff of big water burst downwards of big blast hole that makes progress is solved, can realize the quick shutoff of deep hole blasting arbitrary length, guaranteed the effect that the deep hole explodes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic view of the occluding device of the present invention;
FIG. 2 is a schematic flow chart of the plugging method of the present invention;
FIG. 3 is a schematic structural view of the plugging device in example 2;
FIG. 4 is a schematic structural view of a plugging device according to embodiment 3;
wherein: 1-sealing a hole bag, 2-grouting pipe, 3-water drain pipe, 4-ultra-deep blast hole, 5-water drain valve and 6-blast valve.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
The first embodiment is as follows:
referring to fig. 1-2, this embodiment provides a super deep blast hole plugging device for making progress big gun hole downward discharge is big, including the slip casting subassembly, seted up a plurality of super deep blast holes 4 on the rock mass, all install the hole sealing subassembly in every super deep blast hole 4, the slip casting subassembly is linked together with a plurality of hole sealing subassemblies respectively, all be fixed with the portion of sluicing in every super deep blast hole 4, sluicing portion one end runs through the hole sealing subassembly and is located super deep blast hole 4, sluicing portion other end is located the 4 outsides of super deep blast hole. Grouting in the grouting component and the hole sealing component, so that the hole sealing component is attached to the inner wall of the ultra-deep blast hole under the action of the water drainage part, and the ultra-deep blast hole is sealed.
Further optimization scheme, the hole sealing subassembly includes hole sealing bag 1, and hole sealing bag 1 is two sacks.
In a further optimized scheme, the size of the double-bag is 0.6 m.
Further optimization scheme, the slip casting subassembly includes the slip casting pump, all installs slip casting pipe 2 in every ultra-deep blast hole 4, and 2 one ends of slip casting pipe are run through hole sealing bag 1 and are located ultra-deep blast hole 4, and the 2 other ends of slip casting pipe are located the 4 outsides of ultra-deep blast hole and fixedly connected with connects soon, have slip casting pipe 2 through the reducing intercommunication on the slip casting pump, and slip casting pipe 2 in arbitrary ultra-deep blast hole 4 is through connecing the slip casting pipe 2 intercommunication on with the slip casting pump soon. The grouting pipe 2 on the grouting pump is quickly butted with the next grouting pipe 2 after being disconnected by utilizing quick connection, so that the slurry is prevented from being solidified due to long exposure time, and the subsequent grouting cannot be normally carried out.
Furthermore, one end of the grouting pipe 2 penetrates through one hole sealing bag 1, the end part of the grouting pipe is inserted into the bottom of the hole sealing bag 1, the two hole sealing bags are tightly connected with the grouting pipe 2 through a buckle, the grouting pipe 2 in the hole sealing bag 1 is provided with an explosion valve, when the pressure of the grouting pipe reaches 1MPa, the explosion valve can automatically explode, and slurry can flow out of the pressure valve to fill the grouting bag 1; a grouting pipe 2 is reserved between the two hole sealing bags 1, an explosion valve 6 is arranged in the middle of the reserved grouting pipe, when the pressure in the grouting pipe 2 reaches 1.2MPa, the explosion valve can automatically explode, grouting slurry can be injected between the two hole sealing bags 1 through the opening, and gaps between the bags 1 and 2 are filled. The actual hole sealing length of the blast hole is the sum of the lengths of the two hole sealing bags 1 and the remaining grouting pipe 2.
According to the further optimization scheme, the water draining part comprises a water draining pipe 3, one end of the water draining pipe 3 penetrates through the hole sealing bag 1 and is located in the ultra-deep blast hole 4, the other end of the water draining pipe 3 is located on the outer side of the ultra-deep blast hole 4 and is fixedly communicated with a water draining valve 5, and the length of the blast hole fed into the water draining pipe 3 is 20-40cm longer than that of the double-bag. Sending the drain pipe 3 and the hole sealing assembly into an ultra-deep blast hole together, closing a drain valve, connecting the grouting pipe 2 with a grouting pump, grouting into the hole sealing bag 1 firstly, when the pressure in the hole sealing bag 1 reaches 1MPa, bursting the hole sealing bag 1 by the blasting valve, grouting into another hole sealing bag 1, when the pressure reaches 1.5MPa, opening the blasting valve between the two hole sealing bags 1, grouting into a blast hole, when the whole grouting reaches 2MPa, pulling out the connection between the grouting pump and the grouting pipe 2, and grouting into the next ultra-deep blast hole. And simultaneously opening a drain valve to discharge rock water in the blast hole.
According to the further optimization scheme, for realizing quick and efficient hole sealing, the filter-accumulated hole sealing bag 1 is selected, the hole sealing bag 1 is made of high-elastic polyester double-faced cloth, the hole sealing bag 1 can only inject slurry into a drill hole through water, redundant water can flow out of the hole sealing bag 1, and cement slurry is left in the hole sealing bag 1, so that separation of water, gas and slurry is realized. After the water in the hole sealing bag 1 is filtered, the water-cement ratio is about 0.3: about 1. The hole sealing bag 1 is in close contact with the wall surface of the drill hole, and the drill hole is sealed while high-concentration cement slurry is solidified in the hole.
A method for plugging an ultra-deep blast hole with large water flow from an upward blast hole to a downward blast hole comprises the following steps,
the method comprises the following steps: after the explosive is filled in the ultra-deep blast hole 4, confirming whether the explosive in the ultra-deep blast hole 4 is stable;
step two: a stirrer is arranged on one side of the grouting pump, the grouting pump and the stirrer are flushed by a water pipe, and the grouting pump and the stirrer are subjected to test operation;
step three: adding clear water and hole sealing materials into the stirrer to prepare slurry;
step four: installing a hole sealing bag 1 and a water drain pipe, respectively communicating a grouting pipe 2 on a grouting pump with a grouting pipe 2 in an ultra-deep blast hole 4, and performing grouting work;
step five: cleaning a grouting pump and a stirrer after grouting;
step six: the evacuation personnel are ready for blasting.
The further optimization scheme, step four includes,
4.1, selecting a specification of hole sealing bags 1 according to needs to be installed, placing the two hole sealing bags in front of each other and a water drain pipe into an ultra-deep blast hole 4, closing a water drain valve, connecting a grouting pipe 2 with a grouting pump, fixing and communicating the grouting pipe 2 with an explosion valve 6, and respectively positioning the explosion valve 6 in the two hole sealing bags 1 and between the two hole sealing bags 1;
when the hole sealing device is installed, two hole sealing bags are placed in an ultra-deep blast hole in tandem, the distance between the two hole sealing bags is 0.4-0.8m, the 0.6m double-bag corresponds to a 'two-plug one-injection' hole sealing process, and in the grouting process, the two bags in tandem are filled and expanded firstly. When the pressure reaches 1.2MPa, the explosion valve on the pipeline between the bags automatically explodes, and cement slurry flows into the drilling section in the middle of the bags and fills the area. When the cement grout is solidified, the hole sealing of the drilled hole can be realized. In order to ensure the hole sealing effect of the part, when the pressure representation number of the grouting pump is 2MPa finally, grouting is stopped. The slurry in the middle section has the pressure of 2MPa, has adhesive force with the hole wall, and can play a role in buffering the hole sealing bag at the top end. Through letting the blast valve between two bag bags explode, make the cement thick liquid flow in the hole between the bag, fill whole region, can couple together two bags, increase the area of contact between shutoff subassembly and the super dark blast hole, make the shutoff more stable.
4.2, communicating a grouting pipe 2 on a grouting pump with a grouting pipe 2 in any ultra-deep blast hole 4, starting the grouting pump, grouting into an internal hole sealing bag 1, when the pressure in the internal hole sealing bag 1 reaches 1MPa, bursting a blasting valve in the external hole sealing bag 1 to perform grouting in the external hole sealing bag 1, when the pressure reaches 1.5MPa, opening the blasting valve between the two hole sealing bags 1 to perform grouting in the ultra-deep blast hole 4, and when the overall grouting pressure reaches 2MPa, completing grouting of the ultra-deep blast hole 4, closing the grouting pump, and bending the grouting pipe 2 and fastening by using a binding tape;
4.3, shearing the grouting pipe 2 after grouting by using scissors, quickly connecting and communicating the grouting pipe 2 on the grouting pump with another grouting pipe 2, and then grouting until the grouting of all the ultra-deep blasting holes 4 is finished.
Further optimizing the scheme, the pressure representation number in the step 4.2 is not more than 2.5MPa, and the sealing bag 1 is damaged when the pressure exceeds 2.5MPa, so that the sealing effect is influenced.
In the third step, clear water is added into the stirrer, and meanwhile, the hole sealing material is slowly added until the ratio of the clear water to the hole sealing material is 1: 1. According to experiments, the slurry is too thick, so that the grouting pipe is blocked, the slurry is too thin, the solidification time is prolonged, and therefore, the solidification time can be shortened on the premise that the grouting pipe cannot be blocked by selecting 1:1, so that the blocking is quicker.
And further optimizing the scheme, in the fifth step, the slurry suction pump sucks clean water, and runs for 2-3 minutes at full speed, so that the main body of the slurry suction pump and a slurry suction pipe on the slurry suction pump are washed clean. The slurry suction pipe pipeline and the pump body of the grouting pump are washed clean, and the slurry is prevented from being solidified in the pipeline or the pump body to influence the next use.
And further optimizing the scheme, wherein in the fourth step, whether the pipeline of the grouting pipe 2 is smooth is observed in the grouting process, and the reducing part of the interface is observed at the end point.
Further optimization scheme, when changing the slip casting pipe pipeline to another slip casting pipe, because have pressure in the pipe, forbid to face the workman with the mouth of pipe, avoid the thick liquid blowout to cause the injury to people's eyes, mouth nose.
Example two:
the embodiment provides a method for plugging an ultra-deep blast hole with large water flow from an upward blast hole to a downward blast hole, and the difference between the embodiment and the embodiment I is only that a 1.5m single-bag hole sealing bag is adopted, the 1.5m single-bag corresponds to a 'one-plug' hole sealing process, after grouting, the pressure in the hole sealing bag 1 can reach 2MPa, because the hole sealing bag 1 is made of a special material which is only permeable to water and is not permeable to materials, and most of water in grouting liquid flows out. After the slurry is solidified, higher strength can be achieved.
Example three: the embodiment provides a method for plugging an ultra-deep blast hole with large water flow from an upward blast hole to a downward blast hole, which is only different from the first embodiment in that a 0.7m single bag is adopted, the hole sealing bag is directly installed at one end, close to an inlet, of the ultra-deep blast hole, the 0.7m single bag corresponds to a 'one-plug one-injection' hole sealing process, the hole sealing bag at an orifice is filled firstly in the grouting process, when the slurry pressure reaches 1.2MPa, a blast valve at the top end of a pipeline can automatically burst, and cement slurry fills a part between a powder pipe and the hole sealing bag. Because the slurry concentration at the upper part of the hole sealing bag is lower, the setting time is required to be longer. The invention can fill the gap between the explosive charging part and the hole sealing bag with cement slurry, so that the plugging effect is better, and simultaneously, the stability of the explosive in the ultra-deep blast hole is improved, thereby providing convenience for the subsequent initiation.
In order to find a fast and efficient hole sealing method, underground tests are carried out on bags with different structures, different test materials and different setting times, specific test results are shown in table 1, and the test aims to carry out comparative analysis on three processes of ' one bag for one bag, two bags for one injection and ' one bag for one injection ' so as to obtain the optimal hole sealing process or method.
Table 1 summary of the results of the different pore sealing materials
When the test material is an I-type hole sealing material, a 1.5m single-bag and a 1m single-bag are tested, and when grouting is performed in a test, the grouting pipe can be blocked due to the fact that slurry is too thick when the water-cement ratio is 0.6: 1; the slurry is diluted so that the water-cement ratio of the slurry is approximately 1.5:1 when the grouting pipe is not blocked. After grouting is finished, waiting for the solidification time to be gradually increased from 15min to 1h, however, the test result is poor, all drilled holes have a punching phenomenon, strong detonation waves can be sensed outside a hundred meters, when the punching material is inspected and analyzed, the material can be crushed by fingers, the reason of punching can be attributed to that the solidification effect of the material cannot be reached, and the material is temporarily not suitable for downhole hole sealing
When the II type material is used, the tested bag is a 1.5m single bag, a 0.7m single bag and a 0.6m double bag, the water-cement ratio of the material during grouting is 1:1, the grouting pressure is strictly controlled to be 2MPa through the number indication of a pressure gauge, the material solidification time is 1h during the test, and the final test results are good bag tests. The experiment result shows that the hole sealing process by utilizing the bag can meet the hole sealing requirement of the ultra-deep blast hole, so that the bag plugging hole sealing process is suggested to be adopted in the blasting operation of the working face.
Through the results of field industrial experiments, the key parameters of the efficient hole sealing technology of the blasting drilling of the working face are determined.
(1) The pneumatic grouting pump for the coal mine is required to be small in size, light in weight, easy to move and suitable for fast hole sealing of a plurality of ultra-deep blast holes; the actual grouting pressure is required to be more than 2MPa, so that the bag and the inner wall of the drilled hole are fully combined; grouting flow satisfies formula 1, and slurry is guaranteed to fill the space between the holes of the bag in 20 min.
Q is not less than V/20 formula 1
The grouting pump is started to be a ZBQ portable pneumatic grouting pump, the grouting pump takes compressed air as a power source, full-automatic pneumatic stirring is achieved, operation is simple, and labor intensity of underground workers can be effectively relieved. When cleaning, the stirring device is only required to be opened and clear water is added, so that the air pump is prevented from being blocked by the quick-setting cement. The equipment has better universality and can be used in places with flammability, explosiveness and larger temperature and humidity change.
(2) The connecting pipeline adopts a pipeline with the strength higher than 6MPa, so that the pipeline is not broken when the grouting pump is started.
(3) The hole sealing bag is made of high-elasticity polyester double-faced cloth, the length of the hole sealing bag is less than one third of the length of the top-cutting ultra-deep blast hole, the pressure in the grouting process cannot exceed 2.5MPa, and the hole sealing bag is damaged due to overlarge pressure.
(4) The hole sealing material adopts a II type hole sealing material. During grouting, water and a type II hole sealing material are mixed according to a water-cement ratio of 1:1 is configured. After hole sealing is finished, the solidification time of the material is recommended to be not less than 30 min.
Hole sealing materials and hole sealing equipment are determined by adopting a research and laboratory test method, and an optimal hole sealing process, namely a hole sealing process of 'bag and water drain hole', is determined by an underground hole sealing test method.
In the description of the present invention, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
The above-mentioned embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. A super dark blast hole plugging device for making progress big gun hole downward discharge is big, its characterized in that: including the slip casting subassembly, seted up a plurality of super deep blast holes (4) on the rock mass, every all install the hole sealing subassembly in super deep blast hole (4), the slip casting subassembly respectively with a plurality of the hole sealing subassembly is linked together, every all be fixed with the portion of leaking water in super deep blast hole (4), the portion one end of leaking water runs through the hole sealing subassembly just is located in super deep blast hole (4), the portion other end of leaking water is located the super deep blast hole (4) outside.
2. The ultra-deep blast hole plugging device for upward blasthole downward flow with large water flow according to claim 1, characterized in that: the hole sealing component comprises a hole sealing bag (1), and the hole sealing bag (1) is a double-bag.
3. The ultra-deep blast hole plugging device for upward blasthole downward flow with large water flow according to claim 2, characterized in that: the length of the double-bag is 0.4-0.8 m.
4. The ultra-deep blast hole plugging device for upward blasthole downward flow with large water flow according to claim 2, characterized in that: the slip casting subassembly includes the grouting pump, every all install slip casting pipe (2) in ultra-deep blast hole (4), slip casting pipe (2) one end runs through hole sealing bag (1) and is located in ultra-deep blast hole (4), the slip casting pipe (2) other end is located ultra-deep blast hole (4) outside and fixedly connected with connect soon, there is through the reducing intercommunication on the grouting pump slip casting pipe (2), arbitrary slip casting pipe (2) in ultra-deep blast hole (4) pass through connect soon with on the grouting pump slip casting pipe (2) intercommunication.
5. The ultra-deep blast hole plugging device for upward blasthole downward flow with large water flow according to claim 2, characterized in that: the water draining part comprises a water draining pipe (3), one end of the water draining pipe (3) penetrates through the hole sealing bag (1) and is located in the ultra-deep blast hole (4), and the other end of the water draining pipe (3) is located on the outer side of the ultra-deep blast hole (4) and is fixedly communicated with a water draining valve (5).
6. An ultra-deep blast hole plugging method for upward blasthole downward water flow large, based on the ultra-deep blast hole plugging device for upward blasthole downward water flow large claimed in any one of claims 1 to 5, characterized in that: comprises the following steps of (a) carrying out,
the method comprises the following steps: after the explosive is filled in the ultra-deep blast hole (4), determining whether the explosive in the ultra-deep blast hole (4) is stable;
step two: a stirrer is arranged on one side of the grouting pump, the grouting pump and the stirrer are flushed by a water pipe, and the grouting pump and the stirrer are subjected to test operation;
step three: adding clear water and hole sealing materials into the stirrer to prepare slurry;
step four: installing a hole sealing bag (1) and a water drain pipe, respectively communicating a grouting pipe (2) on a grouting pump with a grouting pipe (2) in the ultra-deep blast hole (4), and performing grouting work;
step five: cleaning a grouting pump and a stirrer after grouting;
step six: the evacuation personnel are ready for blasting.
7. The method for plugging an ultra-deep blast hole with large upward blasthole-downward water flow according to claim 6, characterized in that: the fourth step comprises the steps of,
4.1, selecting a specification of hole sealing bags (1) according to needs to be installed, placing the two hole sealing bags in front of each other and a water drain pipe into an ultra-deep blast hole (4), closing a water drain valve, connecting a grouting pipe (2) with a grouting pump, fixing and communicating the grouting pipe (2) with a blasting valve (6), wherein the blasting valve (6) is respectively positioned in the two hole sealing bags (1) and between the two hole sealing bags (1);
4.2, communicating a grouting pipe (2) on a grouting pump with a grouting pipe (2) in any ultra-deep blast hole (4), starting the grouting pump, grouting into an internal hole sealing bag (1), when the pressure in the internal hole sealing bag (1) reaches 1MPa, bursting a blasting valve in the external hole sealing bag (1) to be blasted, grouting into an external hole sealing bag (1), when the pressure reaches 1.5MPa, opening the blasting valve between the two hole sealing bags (1), grouting into the ultra-deep blast hole (4), when the overall grouting pressure reaches 2MPa, completing grouting of the ultra-deep blast hole (4), closing the grouting pump, and bending the grouting pipe (2) and fastening with a binding belt;
and 4.3, quickly connecting and communicating the grouting pipe (2) on the grouting pump with another grouting pipe (2), and then grouting until all the ultra-deep blast holes (4) are completely grouted.
8. The method for plugging an ultra-deep blast hole with large upward blasthole-downward water flow according to claim 6, characterized in that: in the third step, clear water is firstly added into the stirrer, and meanwhile, the hole sealing material is slowly added until the ratio of the clear water to the hole sealing material is 1: 1.
9. The method for plugging an ultra-deep blast hole with large upward blasthole-downward water flow according to claim 6, characterized in that: and step five, sucking clear water into the slurry suction pump, and running for 2 minutes at full speed to clean the main body of the slurry suction pump and a slurry suction pipe on the slurry suction pump.
10. The method for plugging an ultra-deep blast hole with large upward blasthole-downward water flow according to claim 6, characterized in that: and in the fourth step, whether the pipeline of the grouting pipe (2) is unobstructed or not is observed in the grouting process, and the reducing part of the interface is mainly observed.
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| CN215213418U (en) * | 2021-04-15 | 2021-12-17 | 中天合创能源有限责任公司 | Water-rich mine roof drilling blasting presplitting hole sealing structure |
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| CN203756114U (en) * | 2014-03-28 | 2014-08-06 | 淮南矿业(集团)有限责任公司 | Grouting hole packer with capsular bag |
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