CN206681739U - Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions - Google Patents

Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions Download PDF

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Publication number
CN206681739U
CN206681739U CN201720186327.1U CN201720186327U CN206681739U CN 206681739 U CN206681739 U CN 206681739U CN 201720186327 U CN201720186327 U CN 201720186327U CN 206681739 U CN206681739 U CN 206681739U
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China
Prior art keywords
grouting
pressure
monitoring
borehole
newly
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Withdrawn - After Issue
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CN201720186327.1U
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Chinese (zh)
Inventor
姚直书
程桦
荣传新
蔡海兵
王晓健
宋海清
郑腾龙
黎明镜
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Priority to CN201720186327.1U priority Critical patent/CN206681739U/en
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Abstract

The utility model provides newly-built deep vertical pre grouting from the surface monitoring system under a kind of neighbouring existing wellbore conditions, including:Grouting pressure set-up of control system is in the pre grouting from the surface pumping plant of newly-built deep vertical periphery, for monitoring the changing value of grouting pressure;Water level automatic monitoring system is arranged in the peephole between newly-built deep vertical and neighbouring existing pit shaft, for the SEA LEVEL VARIATION value in monitoring and observation hole;Borehole wall depressurized system is arranged on the borehole wall of existing pit shaft;When the slurry pressure that is transferred on the existing pit shaft borehole wall of diffusion exceedes the design external load value on the existing pit shaft borehole wall, borehole wall depressurized system is by automatically unloading, for preventing the existing pit shaft borehole wall is met with from destroying.The utility model uses the protection of triple monitoring systems; make under neighbouring existing wellbore conditions safer Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system, science and rationally; it can effectively prevent the high pressure slurries of slip casting from breaking up neighbouring existing pit shaft, it is ensured that existing pit shaft safe operation.

Description

Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions
Technical field
It the utility model is related to a kind of pre-pouring grout monitoring system, and in particular to newly-built coal under a kind of neighbouring existing wellbore conditions Ore deposit depth vertical pre grouting from the surface monitoring system.
Background technology
In recent years, as production colliery superficial part resource is progressively exhausted, in order to ensure the sustainable development of mine, most mines There is an urgent need to reorganization and expansion with high safety and deep horizontal extension line project, newly-built deep shaft engineering is increasingly such as in surface plant Increase.Due to multiple pit shafts such as existing main shaft, auxiliary shaft and ventilating shaft in surface plant, deep vertical newly-built in the case will be adjacent to both There is pit shaft, typically at a distance of 50~150m or so between newly-built deep vertical and existing pit shaft.
During newly deep vertical is built in colliery, grouting and water-proof curtain can be formed around pit shaft using pre grouting from the surface technology Curtain, so as to which water yield, improvement sinking shaft condition and the quickening speed of application during shaft construction be greatly lowered.Due in industry The pit shaft of newly-built deep vertical is deep in square, and the hydraulic pressure in water-bearing layer is big, carries out during pre grouting from the surface that grouting pressure will be very high, such Under big grouting pressure effect, grouting serous fluid will be far along formation fracture migration, when grouting serous fluid runs into neighbouring existing pit shaft When, high pressure slurries will break the borehole wall of existing pit shaft, the existing pit shaft of heavy damage, and the safety in production to mine causes serious prestige The side of body.Nowadays at home, existing multiple mine accidents are beaten by pre grouting from the surface is carried out during newly-built pit shaft in surface plant Bad neighbouring existing pit shaft is so as to initiation.To sum up, Newly-built Coal Mine depth vertical carries out pre grouting from the surface under neighbouring existing wellbore conditions When, it is necessary to scientific and rational monitoring system is used, prevents the high pressure slurries of slip casting from breaking up neighbouring original pit shaft, it is ensured that both There is pit shaft safe operation.
Therefore, carrying out Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system research under neighbouring existing wellbore conditions has ten Divide important meaning.
The content of the invention
The purpose of this utility model is to provide Newly-built Coal Mine depth vertical surface advance grouting under a kind of neighbouring existing wellbore conditions Monitoring system is starched, with when at least solving that Newly-built Coal Mine depth vertical carries out pre grouting from the surface under neighbouring existing wellbore conditions at present, note The high pressure slurries entered break up neighbouring existing pit shaft, the problem of causing serious security incident to existing pit shaft.
To achieve these goals, the utility model provides following technical scheme:
Newly-built deep vertical pre grouting from the surface monitoring system under a kind of neighbouring existing wellbore conditions, the pre-pouring grout monitoring system Including:
Grouting pressure control system, the grouting pressure set-up of control system are pre- on the ground of the newly-built deep vertical periphery In grouting pump station, for monitoring the changing value of grouting pressure;
Water level automatic monitoring system, the water level automatic monitoring system are arranged on the newly-built deep vertical and neighbouring existing well In peephole between cylinder, for monitoring the SEA LEVEL VARIATION value caused by grouting serous fluid in the peephole;
Borehole wall depressurized system, the borehole wall depressurized system are arranged on the borehole wall of the existing pit shaft;When diffusion is transferred to When slurry pressure on the existing pit shaft borehole wall exceedes the design external load value on the existing pit shaft borehole wall, the borehole wall release System destroys automatically unloading for preventing the existing pit shaft borehole wall from meeting with.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that described Grouting pressure control system includes:
Grouting pipeline, for the grouting serous fluid in the pre grouting from the surface pumping plant to be delivered in multiple injected holes;
High pressure four-way valve, the first connector and the second connector of the high pressure four-way valve are provided with the grouting pipeline Be both connected on the grouting pipeline, and first connector is connected by high-pressure slip-casting flexible pipe with grouting pump, described second Connector is connected by high-pressure slip-casting flexible pipe with slip casting interface tube.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that described Pressure sensor is installed on the 3rd connector of high pressure four-way valve, is provided with and unloads on the 4th connector of the high pressure four-way valve Pressure valve;
And the pressure sensor and the grouting pump are connected by signal transmssion line with computer, by the computer Receive the keying whether signal, the control grouting pump that the pressure sensor is sent worked and controlled the pressure-relief valve.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that multiple The injected hole circumferentially arranges the periphery for being centered around the newly-built deep vertical.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that described Peephole is arranged on the middle position between the newly-built deep vertical and neighbouring existing pit shaft.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that described Water level automatic monitoring system is water level automatic monitoring instrument, for monitoring the SEA LEVEL VARIATION caused by grouting serous fluid in the peephole Situation;The SEA LEVEL VARIATION signal that the water level automatic monitoring instrument is sent is transmitted to computer, and water level is received by the computer After variable signal, the instruction for whether stopping slip casting being sent to grouting pump.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that just Pressure relief vent is set on the borehole wall of the neighbouring existing pit shaft of the corresponding newly-built deep vertical, the borehole wall depressurized system passed through described Pressure relief vent is arranged on the inner side of the borehole wall of the existing pit shaft, and the outside of the borehole wall of the existing pit shaft is water-bearing layer.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that described Borehole wall depressurized system includes:
Triple Valve with High Pressure, the first connector connection release steel pipe of the Triple Valve with High Pressure, the release steel pipe pass through institute The borehole wall for stating existing pit shaft is connected with the pressure relief vent;
High-pressure ball valve, the high-pressure ball valve are connected with the second connector of the Triple Valve with High Pressure;
Automatic relief valve, the automatic relief valve are connected with the 3rd connector of the Triple Valve with High Pressure.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that in institute State and strengthening steel slab is additionally provided with release steel pipe, and the strengthening steel slab is fixed on the inside of the borehole wall of the existing pit shaft.
The newly-built deep vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as described above, it is preferable that in institute State and packing ring is additionally provided with release steel pipe, the packing ring is located between the strengthening steel slab and the borehole wall of the existing pit shaft;And The strengthening steel slab is fixed on the borehole wall of the existing pit shaft by fixing Short bolt, for preventing the release steel pipe by high pressure Slurries or water under high pressure ejection.
Compared with immediate prior art, technical scheme provided by the utility model has following excellent effect:
The utility model uses triple prisons of grouting pressure control system, water level automatic monitoring system and borehole wall depressurized system The protection of control system, make the utility model Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions Safer, science and rationally, can effectively prevent the high pressure slurries of slip casting from breaking up neighbouring existing pit shaft, it is ensured that existing pit shaft peace Battalion for the national games.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding to of the present utility model, this practicality New schematic description and description is used to explain the utility model, does not form to improper restriction of the present utility model. Wherein:
Fig. 1 is the grouting pressure control system schematic diagram of the utility model embodiment;
Fig. 2 is to set water level automatic monitoring system to show between the newly-built deep vertical of the utility model embodiment and existing pit shaft It is intended to;
Fig. 3 is the borehole wall depressurized system schematic diagram of the existing pit shaft of the utility model embodiment;
Description of reference numerals:1- grouting pressure control systems;11- grouting pumps;12- signal transmssion lines;13- computers;14- High-pressure slip-casting flexible pipe;15- high pressure four-way valves;16- pressure-relief valves;17- pressure sensors;18- slip casting interface tubes;2- water levels are supervised automatically Control system;21- injected holes;The newly-built deep vertical of 22-;The existing ventilating shaft cylinders of 23-;24- peepholes;The existing main holes of 25-;26- is existing Auxiliary shaft cylinder;3- borehole wall depressurized systems;31- water-bearing layers;The borehole wall of the existing pit shafts of 32-;33- pressure relief vents;34- release steel pipes;35- consolidates Determine Short bolt;36- packing rings;37- strengthening steel slabs;38- Triple Valve with High Pressure;39- automatic relief valves;310- high-pressure ball valves.
Embodiment
Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.It should be noted that do not conflicting In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
In description of the present utility model, term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right", The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom " be based on orientation shown in the drawings or position relationship, It is for only for ease of description the utility model rather than requires that the utility model must be with specific azimuth configuration and operation, therefore It is not intended that to limitation of the present utility model.The term " connected " that is used in the utility model, " connection " should be interpreted broadly, For example, it may be it is fixedly connected or is detachably connected;Can be joined directly together, can also be indirect by intermediate member It is connected, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figure 1 to Figure 3, according to embodiment of the present utility model, there is provided new under a kind of neighbouring existing wellbore conditions Colliery depth vertical pre grouting from the surface monitoring system is built, pre-pouring grout monitoring system is controlled by computer 13, pre-pouring grout monitoring system bag Include:
Grouting pressure control system 1, grouting pressure control system 1 are arranged on the pre grouting from the surface of the newly-built periphery of deep vertical 22 In pumping plant, for accurately controlling the changing value of grouting pressure;In order to observe the spread condition of grouting serous fluid, further control note The situation of change of pressure is starched, so as to reach the technique effect of the existing pit shaft borehole wall of multiple protective, the utility model is also provided with seeing Gaging hole 24;Water level automatic monitoring system 2, water level automatic monitoring system 2 be arranged on newly-built deep vertical 22 and neighbouring existing pit shaft it Between peephole 24 in, for the SEA LEVEL VARIATION value in monitoring and observation hole 24;In order that the existing pit shaft borehole wall has multiple protective Barrier, the utility model are also provided with borehole wall depressurized system 3, and borehole wall depressurized system 3 is arranged on the borehole wall 32 of existing pit shaft;When When diffusion is transferred to the slurry pressure on the existing pit shaft borehole wall more than design external load value on the existing pit shaft borehole wall, the borehole wall unloads Pressure system 3 is by automatically unloading, for preventing the existing pit shaft borehole wall is met with from destroying.
Grouting pressure control system 1 includes:Grouting pipeline, for the grouting serous fluid in pre grouting from the surface pumping plant to be delivered to In multiple injected holes 21;High pressure four-way valve 15 is provided with grouting pipeline, i.e. high pressure four-way valve 15 is arranged on grouting pump 11 and note Some opening position on the high-pressure slip-casting flexible pipe 14 between interface tube 18 is starched, and in pre grouting from the surface pumping plant;More specifically It is both connected to for the first connector and the second connector of high pressure four-way valve 15 on grouting pipeline, and the first connector passes through high pressure Slip casting flexible pipe 14 is connected with grouting pump 11, the second connector is connected by high-pressure slip-casting flexible pipe 14 with slip casting interface tube 18.High pressure Pressure sensor 17 is installed on the 3rd connector of four-way valve 15, release is installed on the 4th connector of high pressure four-way valve 15 Valve 16;And pressure sensor 17, pressure-relief valve 16 and grouting pump 11 are connected by signal transmssion line 12 with computer 13, by calculating Machine 13 receives the keying whether signal, the control grouting pump 11 that pressure sensor 17 is sent worked and controlled pressure-relief valve 16.
Again as shown in Fig. 2 in specific embodiment of the utility model, multiple injected holes 21, which circumferentially arrange, to be centered around newly The periphery of deep vertical 22 is built, for forming grouting and water-proof curtain around the newly-built deep vertical 22, so as to be greatly lowered Water yield, improvement sinking shaft condition and quickening speed of application during shaft construction.Preferably, injected hole 21 enclose footpath be 15~ 40m (i.e. the distance between injected hole 21 and newly-built deep vertical 22 are 15~40m);Preferably, in the utility model embodiment Injected hole 21 is preferably 8.In newly-built deep vertical 22, (existing pit shaft includes multiple pit shafts, such as existing main shaft with existing pit shaft Cylinder 25, existing ventilating shaft cylinder 23 and existing auxiliary shaft cylinder 26) between construction peephole 24 is set, and in peep hole 24 installation water level from Dynamic monitoring system 2, for the SEA LEVEL VARIATION situation in monitoring and observation hole 24.
In specific embodiment of the utility model, peephole 24 be arranged on grouting and water-proof curtain it is outer and with newly-built deep vertical 22 have a certain distance, in order to can just can be to the expansion of grouting serous fluid before grouting serous fluid diffuses to newly-built deep vertical 22 Scattered situation is detected, and prevents accident;Preferably, peephole 24 be arranged on newly-built deep vertical 22 and neighbouring existing pit shaft it Between middle position.
In specific embodiment of the utility model, water level automatic monitoring system 2 is water level automatic monitoring instrument, and water level is automatic Monitor is arranged in peephole 24, for the SEA LEVEL VARIATION situation in monitoring and observation hole 24;Specially water level is monitored automatically Instrument wire rope suspensioning, transfer in peephole 24 at the 20m of underwater;The SEA LEVEL VARIATION signal that water level automatic monitoring instrument is sent passes Transport on computer 13, after receiving SEA LEVEL VARIATION signal by computer 13, the instruction for whether stopping slip casting being sent to grouting pump 11.
In specific embodiment of the utility model, and as shown in figure 3, just corresponding to the neighbouring existing of newly-built deep vertical 22 Pressure relief vent 33 is set on the borehole wall 32 of pit shaft, borehole wall depressurized system 3 is arranged on to the borehole wall 32 of existing pit shaft by pressure relief vent 33 Inner side, the outside of the borehole wall 32 of existing pit shaft is water-bearing layer 31.
In specific embodiment of the utility model, borehole wall depressurized system 3 includes:Triple Valve with High Pressure 38, Triple Valve with High Pressure 38 the first connector connection release steel pipe 34, the borehole wall 32 of release steel pipe 34 through existing pit shaft is connected with pressure relief vent 33;It is high Pressure ball valve 310, high-pressure ball valve 310 are connected with the second connector of Triple Valve with High Pressure 38;Automatic relief valve 39, automatic relief valve 39 It is connected with the 3rd connector of Triple Valve with High Pressure 38, automatic pressure-relief function can be achieved.Reinforcing is additionally provided with release steel pipe 34 Steel plate 37, and strengthening steel slab 37 is fixed on the inner side of the borehole wall 32 of existing pit shaft.It is further preferred that on release steel pipe 34 also Packing ring 36 is provided with, packing ring 36 is located between strengthening steel slab 37 and the borehole wall 32 of existing pit shaft;And packing ring 36 and strengthening steel slab 37 It is fixed on by fixed Short bolt 35 on the borehole wall 32 of existing pit shaft, for preventing release steel pipe 34 by high pressure slurries and water under high pressure Ejection.Embodiment of the present utility model sets packing ring, is the outside in order to prevent press water along pressure relief vent 33, release steel pipe 34 Flow into existing pit shaft;Embodiment of the present utility model sets the effect of strengthening steel slab 37 to be:Strengthening steel slab passes through the short anchor of fixation Bar 35 is fixed on the borehole wall 32 of existing pit shaft, pushes down release steel pipe 34, after preventing that press water from ejecting release steel pipe 34, Cause press water uncontrollable and flood well.In embodiment of the present utility model when constructing pressure relief vent 33, drilling rod passes through smash Valve 310 is constructed, and after being drilled pressure relief vent 33, is transferred to drilling rod, is closed the valve of high-pressure ball valve 310, prevent water under high pressure access wall Cylinder.
In summary, the utility model uses grouting pressure control system 1, water level automatic monitoring system 2 and borehole wall release The protection of triple monitoring systems of system 3, make Newly-built Coal Mine depth vertical ground under neighbouring existing wellbore conditions of the present utility model Pre-pouring grout monitoring system more science, rationally, can effectively prevent the high pressure slurries of slip casting from breaking up neighbouring original pit shaft, it is ensured that both There is pit shaft safe operation, it is specific as follows:
As shown in figure 1, the utility model prevents that slurry pressure is excessive and damages by pressure neighbouring in order to accurately control grouting pressure Existing pit shaft, so as to be provided with grouting pressure control system 1.The high pressure injection connected between grouting pump 11 and slip casting interface tube 18 High pressure four-way valve 15 is provided with slurry flexible pipe 14, and pressure sensor 17 and pressure-relief valve 16 are mounted with high pressure four-way valve 15, Pressure sensor 17 is connected with computer 13, monitors the situation of change of grouting pressure value in real time.When grouting pressure value is higher than design During value, computer 13 will send command signal, be powered off automatically to grouting pump 11, while automatically open up pressure-relief valve 16 and unloaded Pressure, and then the effect of grouting pressure can be accurately controlled, the pressure-relief valve 16 is controlled by computer, stops noting in grouting pump 11 During slurry, pressure-relief valve 16 can just open carry out automatically unloading.
As shown in Fig. 2 slip casting peephole 24 is set between newly-built deep vertical 22 and neighbouring existing pit shaft, in peephole 24 Water level automatic monitoring instrument is installed, for the SEA LEVEL VARIATION in real-time monitoring and observation hole 24, when grouting serous fluid is expanded by rock crack When being scattered to peephole 24, water level automatic monitoring instrument shows that water level is begun to ramp up, and sends the signal of SEA LEVEL VARIATION to computer 13, Instruction is sent from computer 13 to grouting pump 11, stops slip casting.
As shown in figure 3, the newly-built direction of deep vertical 22 is just being corresponded to, the existing well in existing pit shaft adjacent to the position of water-bearing layer 31 Automatic relief valve 39 is installed in drilling on the cylinder borehole wall, when grouting serous fluid diffusion is transferred on the existing pit shaft borehole wall, and grouting serous fluid Pressure exceed the existing pit shaft borehole wall design external load value when, automatic relief valve 39 automatically opens up release, it is ensured that existing well The cylinder borehole wall exempts from destruction.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this area Technical staff for, the utility model can have various modifications and variations.It is all within the spirit and principles of the utility model, Any modification, equivalent substitution and improvements made etc., should be included within the scope of protection of the utility model.

Claims (10)

1. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under a kind of neighbouring existing wellbore conditions, it is characterised in that described Pre-pouring grout monitoring system includes:
Grouting pressure control system, pre grouting from the surface of the grouting pressure set-up of control system in the newly-built deep vertical periphery In pumping plant, for monitoring the changing value of grouting pressure;
Water level automatic monitoring system, the water level automatic monitoring system be arranged on the newly-built deep vertical and neighbouring existing pit shaft it Between peephole in, for monitoring the SEA LEVEL VARIATION value in the peephole;
Borehole wall depressurized system, the borehole wall depressurized system are arranged on the borehole wall of the existing pit shaft;Described in being transferred to when diffusion When slurry pressure on the existing pit shaft borehole wall exceedes the design external load value on the existing pit shaft borehole wall, the borehole wall depressurized system By automatically unloading, destroyed for preventing the existing pit shaft borehole wall from meeting with.
2. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 1, its It is characterised by, the grouting pressure control system includes:
Grouting pipeline, for the grouting serous fluid in the pre grouting from the surface pumping plant to be delivered in multiple injected holes;
High pressure four-way valve is provided with the grouting pipeline, the first connector and the second connector of the high pressure four-way valve connect It is connected on the grouting pipeline, and first connector is connected by high-pressure slip-casting flexible pipe with grouting pump, second connection Mouth is connected by high-pressure slip-casting flexible pipe with slip casting interface tube.
3. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 2, its It is characterised by, pressure sensor is provided with the 3rd connector of the high pressure four-way valve, and the 4th of the high pressure four-way valve connects Pressure-relief valve is installed on interface;
And the pressure sensor and the grouting pump are connected by signal transmssion line with computer, are received by the computer Whether signal, the control grouting pump of the pressure sensor transmission work and control the keying of the pressure-relief valve.
4. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 2, its It is characterised by, multiple injected holes circumferentially arrange the periphery for being centered around the newly-built deep vertical.
5. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 1, its It is characterised by, the peephole is arranged on the middle position between the newly-built deep vertical and neighbouring existing pit shaft.
6. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under the neighbouring existing wellbore conditions as described in claim 1 or 5, Characterized in that, the water level automatic monitoring system is water level automatic monitoring instrument, cause the observation for monitoring grouting serous fluid SEA LEVEL VARIATION situation in hole;The SEA LEVEL VARIATION signal that the water level automatic monitoring instrument is sent is transmitted to computer, by described After computer receives SEA LEVEL VARIATION signal, the instruction for whether stopping slip casting being sent to grouting pump.
7. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 1, its It is characterised by, pressure relief vent is set on the borehole wall of neighbouring existing pit shaft for just corresponding to the newly-built deep vertical, the borehole wall is unloaded Pressure system is arranged on the inner side of the borehole wall of the existing pit shaft by the pressure relief vent, and the outside of the borehole wall of the existing pit shaft is Water-bearing layer.
8. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 7, its It is characterised by, the borehole wall depressurized system includes:
Triple Valve with High Pressure, the first connector connection release steel pipe of the Triple Valve with High Pressure, the release steel pipe through it is described both The borehole wall for having pit shaft is connected with the pressure relief vent;
High-pressure ball valve, the high-pressure ball valve are connected with the second connector of the Triple Valve with High Pressure;
Automatic relief valve, the automatic relief valve are connected with the 3rd connector of the Triple Valve with High Pressure.
9. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 8, its It is characterised by, strengthening steel slab is additionally provided with the release steel pipe, and the strengthening steel slab is fixed on the existing pit shaft On on the inside of the borehole wall.
10. Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions as claimed in claim 9, its It is characterised by, packing ring is additionally provided with the release steel pipe, and the packing ring is located at the strengthening steel slab and the existing pit shaft The borehole wall between;It is described for preventing and the strengthening steel slab is fixed on the borehole wall of the existing pit shaft by fixing Short bolt Release steel pipe is ejected by high pressure slurries or water under high pressure.
CN201720186327.1U 2017-02-28 2017-02-28 Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions Withdrawn - After Issue CN206681739U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018157654A1 (en) * 2017-02-28 2018-09-07 安徽理工大学 System for monitoring ground pre-grouting of newly-built deep vertical shaft of colliery under the condition of adjacency to existing mineshaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018157654A1 (en) * 2017-02-28 2018-09-07 安徽理工大学 System for monitoring ground pre-grouting of newly-built deep vertical shaft of colliery under the condition of adjacency to existing mineshaft

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