CN216360991U - Control system for drilling and sealing holes for underground gas extraction of coal mine - Google Patents
Control system for drilling and sealing holes for underground gas extraction of coal mine Download PDFInfo
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- CN216360991U CN216360991U CN202123018978.5U CN202123018978U CN216360991U CN 216360991 U CN216360991 U CN 216360991U CN 202123018978 U CN202123018978 U CN 202123018978U CN 216360991 U CN216360991 U CN 216360991U
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Abstract
Colliery is gas drainage drilling hole sealing control system in pit, including the PLC controller, a display screen, hole sealing slip casting pump package spare, the liquid reserve tank, the slip casting pipe, the solenoid valve, manometer and pressure sensor, hole sealing slip casting pump package spare export and slip casting pipe access connection, hole sealing slip casting pump package spare import is passed through the liquid suction pipe and is connected with the liquid reserve tank, the slip casting pipe stretches into the first bag in the drilling along being on a parallel with drilling central line direction, inside hole sealing section and the second bag, solenoid valve and manometer are installed on the slip casting pipe, pressure sensor connects between the output of manometer and the input of PLC controller, the output of PLC controller respectively with the display screen, the input of solenoid valve and the input of hole sealing slip casting pump package spare are connected. The utility model monitors the hole sealing pressure in real time, immediately replenishes grout when the pressure drops, and simultaneously sets automatic alarm for the grout amount in the liquid storage tank to remind workers to feed in time, thereby ensuring the timeliness and reliability of the grout replenishment.
Description
Technical Field
The utility model belongs to the technical field of underground gas prevention and control, and particularly relates to a drilling and hole sealing control system for underground gas extraction of a coal mine.
Background
The main hole sealing processes of the coal mine underground gas extraction drill hole include cement slurry hole sealing, high polymer foam material hole sealing, bag type hole sealing device hole sealing, secondary hole sealing method hole sealing, double-plugging and one-injection pressurized hole sealing and the like. The extraction effect is better in ' two-plugging one-injection ' hole sealing with pressure ', and the ' two-plugging one-injection ' hole sealing with pressure can enable hole sealing materials (slurry) to well penetrate into peripheral cracks of a drilling hole at a hole sealing section, effectively seal a gas leakage channel and improve the sealing property. The existing problems are that the strength of two plugs is low, so that the grouting pressure is not high or is not high, the cracks around a drill hole cannot be tightly plugged, the purpose of one-plug cannot be achieved, and the extraction effect is poor. As the hole sealing pressure decreases with the lapse of time, the hole sealing material commonly used before can not realize the secondary grouting pressure compensation, resulting in the occurrence of air leakage; at present, whether drilling holes leak air or not is regularly checked by workers, and grout is manually injected after air leakage is found, so that the operation mode has hysteresis, the injection filling operation is complex, and the working efficiency is low. Therefore, how to realize automatic control and perform the filling of the hole sealing material after the pressure of the slurry at the hole sealing section is reduced is the problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides the coal mine underground gas extraction drilling and sealing control system which is scientific in principle, easy to operate, capable of monitoring the pressure change of a sealing section in real time and supplementing grouting liquid.
In order to solve the technical problems, the utility model adopts the following technical scheme: colliery is gas drainage drilling hole sealing control system in pit, including the PLC controller, a display screen, hole sealing slip casting pump package spare, the liquid reserve tank, the slip casting pipe, the solenoid valve, manometer and pressure sensor, hole sealing slip casting pump package spare export and slip casting pipe access connection, hole sealing slip casting pump package spare import is passed through the liquid suction pipe and is connected with the liquid reserve tank, the slip casting pipe stretches into the first bag in the drilling along being on a parallel with drilling central line direction, inside hole sealing section and the second bag, solenoid valve and manometer are installed on the slip casting pipe, pressure sensor connects between the output of manometer and the input of PLC controller, the output of PLC controller respectively with the display screen, the input of solenoid valve and the input of hole sealing slip casting pump package spare are connected.
The liquid reserve tank is the container of cask shape, and lateral part and upside do not are equipped with down level gauge and last level gauge under the liquid reserve tank, and the output of lower level gauge and last level gauge all is connected with the input of PLC controller, and the output of PLC controller still control connection has the audible-visual annunciator.
The liquid reserve tank top center department is equipped with agitator motor, and the eccentric department in liquid reserve tank top is equipped with the charge door, and agitator motor's main shaft is perpendicular downwards and coaxial coupling has the (mixing) shaft that stretches into the liquid reserve tank inside, is equipped with stirring vane on the (mixing) shaft, and the output and the agitator motor control of PLC controller are connected.
The bottom of the liquid storage tank is provided with a supporting leg, the liquid pumping pipe is provided with a manual valve, and the inlet end of the liquid pumping pipe is connected to the bottom of the liquid storage tank.
By adopting the technical scheme, the first bag and the second bag are sleeved on the gas extraction pipe at intervals, the grouting pipe is provided with check valves inside the first bag and the second bag, and the grouting pipe is provided with an explosion valve inside the hole sealing section (the drilling section between the first bag and the second bag). When hole sealing operation is carried out, a manual valve is opened, a PLC (programmable logic controller) sends out commands of opening a solenoid valve and starting a hole sealing grouting pump assembly, the hole sealing grouting pump assembly extracts slurry in a liquid storage tank and fills the slurry into a left bag and a right bag through two check valves, the left bag and the right bag expand radially and generate jacking pressure with the wall of a drilled hole, and after the pressure of the slurry in the left bag and the right bag reaches a specified value, the left bag and the right bag at the left end and the right end of a hole sealing section firmly seal the drilled hole to finish 'two-plugging'; and the hole sealing grouting pump assembly continues pressurizing and grouting, the explosion valve in the hole sealing section is opened due to the pressure action, the hole sealing grouting pump assembly starts grouting in the hole sealing section, and after the indication number of a pressure gauge on the grouting pipe is 2-2.5 times of the pressure of the coal bed and the pressure is stable, the PLC closes the electromagnetic valve and the hole sealing grouting pump assembly, grouting is stopped, and 'one grouting' is completed.
Then, gas in the drill hole is extracted through the gas extraction pipe, and in the gas extraction process, when the numerical value of a pressure gauge on the grouting pipe is transmitted to the PLC through the pressure sensor, the PLC transmits the numerical value to a display for on-site display; when the numerical value of the pressure gauge is smaller than the coal seam pressure, generally, when the numerical value of the pressure gauge is 1.2-1.5 times of the coal seam gas pressure, the PLC sends signals to the electromagnetic valve and the hole sealing grouting pump assembly, the electromagnetic valve is opened, the hole sealing grouting pump assembly is started, grouting pressure compensation is carried out on a grouting sealing section through the grouting pipe, after the numerical value of the pressure gauge reaches the specified pressure (2-2.5 times of the coal seam pressure), the PLC sends signals for closing the electromagnetic valve and the hole sealing grouting pump assembly, automatic grouting is stopped, the electromagnetic valve is closed, and gas extraction operation is continued.
In the gas drainage process, the fluid replacement thick liquid will be many times of reinjection, therefore, when the liquid level of thick liquid descends the position of level gauge monitoring down in the liquid storage tank, lower level gauge will need reinforced signal transmission to the PLC controller, the PLC controller is to acousto-optic alarm signals, acousto-optic alarm sends alarm signal, remind the staff, the staff adds the thick liquid raw materials (guar gum, boron powder and glycerine) to the liquid storage tank through the charge door in, the manual work sets for the churning time through the PLC controller, start agitator motor and stir the thick liquid raw materials, after the stirring, PLC controller self-closing agitator motor, accomplish reinforced operation. When the thick liquid level rose to the position of supreme level gauge monitoring, gone up the level gauge and arrive PLC controller with signal transmission, the audible and visual siren sends alarm signal, reminds the staff can not reinforced again.
In conclusion, the device has the advantages of simple structure, scientific principle and easy implementation, hole sealing pressure is monitored in real time, grout is replenished and injected immediately when the pressure is reduced, and meanwhile, automatic alarm is set for the grout amount in the liquid storage tank to remind workers of timely feeding, so that the timeliness and the reliability of grout replenishment are ensured.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
As shown in fig. 1, the hole sealing control system for the coal mine underground gas extraction drill hole comprises a PLC controller 1, a display screen 2, a hole sealing grouting pump assembly 3, a liquid storage tank 4, a grouting pipe 5, an electromagnetic valve 6, a pressure gauge 7 and a pressure sensor 8, wherein an outlet of the hole sealing grouting pump assembly 3 is connected with an inlet of the grouting pipe 5, an inlet of the hole sealing grouting pump assembly 3 is connected with the liquid storage tank 4 through a liquid pumping pipe 9, the grouting pipe 5 extends into a first bag 11, a hole sealing section 12 and a second bag 13 in the drill hole 10 along a direction parallel to a central line of the drill hole 10, the electromagnetic valve 6 and the pressure gauge 7 are installed on the grouting pipe 5, the pressure sensor 8 is connected between an output end of the pressure gauge 7 and an input end of the PLC controller 1, and an output end of the electromagnetic valve of the PLC controller 1 is respectively connected with the input end of the display screen 2 and the input end of the electromagnetic valve 6 and an input end of the hole sealing pump assembly 3.
4 top centers of liquid reserve tank are located and are equipped with agitator motor 17, and 4 top eccentric departments of liquid reserve tank are equipped with charge door 18, and agitator motor 17's main shaft is perpendicular downwards and coaxial coupling has the (mixing) shaft 19 that stretches into 4 insides of liquid reserve tank, is equipped with stirring vane 20 on the (mixing) shaft 19, PLC controller 1's output and agitator motor 17 control connection.
The bottom of the liquid storage tank 4 is provided with a supporting leg (not shown), the liquid pumping pipe 9 is provided with a manual valve 21, and the inlet end of the liquid pumping pipe 9 is connected with the bottom of the liquid storage tank 4.
By adopting the technical scheme, the first bag 11 and the second bag 13 are sleeved on the gas extraction pipe 22 at intervals, the grouting pipe 5 is provided with the check valves 23 in the first bag 11 and the second bag 13, and the grouting pipe 5 is provided with the explosion valve 24 in the hole sealing section 12 (the section of the drill hole 10 between the first bag 11 and the second bag 13). When hole sealing operation is carried out, a manual valve 21 is opened, a PLC (programmable logic controller) 1 sends out a command that an electromagnetic valve 6 is opened and a hole sealing grouting pump assembly 3 is started, the hole sealing grouting pump assembly 3 extracts slurry in a liquid storage tank and fills the slurry into a left bag and a right bag through two check valves 23, the left bag and the right bag expand radially and generate jacking pressure with the hole wall of a drill hole 10, and after the pressure of the slurry in the left bag and the right bag reaches a specified value, the left bag and the right bag at the left end and the right end of a hole sealing section 12 firmly seal the drill hole 10 to finish 'double plugging'; the hole sealing grouting pump assembly 3 continues pressurizing grouting, the explosion valve 24 in the hole sealing section 12 is opened due to the pressure effect, the hole sealing grouting pump assembly 3 starts grouting in the hole sealing section 12, after the indication number of the pressure gauge 7 on the grouting pipe 5 is 2-2.5 times of the coal seam pressure and the pressure is stable, the PLC controller 1 closes the electromagnetic valve 6 and the hole sealing grouting pump assembly 3, grouting is stopped, and 'first grouting' is completed.
Then, gas in the drill hole 10 is extracted through the gas extraction pipe 22, and in the gas extraction process, when the numerical value of the pressure gauge 7 on the grouting pipe 5 is transmitted to the PLC controller 1 through the pressure sensor 8, the PLC controller 1 transmits the numerical value to a display to be displayed on site; when the value of the pressure gauge 7 is smaller than the coal seam pressure, generally, when the value of the pressure gauge 7 is 1.2-1.5 times of the coal seam gas pressure, the PLC controller 1 sends a signal to the electromagnetic valve 6 and the hole sealing grouting pump assembly 3, the electromagnetic valve 6 is opened, the hole sealing grouting pump assembly 3 is started, grouting and pressure supplementing are carried out on a grouting sealing section through the grouting pipe 5, after the value of the pressure gauge 7 reaches the specified pressure (2-2.5 times of the coal seam pressure), the PLC controller 1 sends a closing signal to the electromagnetic valve 6 and the hole sealing grouting pump assembly 3, automatic grouting is stopped, the electromagnetic valve 6 is closed, and gas extraction operation is continued.
In the gas drainage process, the fluid replacement thick liquid will be many times of reinjection, therefore, when the liquid level of thick liquid descends the position of the monitoring of liquid level gauge 14 down in the liquid storage tank, liquid level gauge 14 will need reinforced signal transmission to PLC controller 1 down, PLC controller 1 sends signal to acousto-optic siren 16, acousto-optic siren 16 sends alarm signal, remind the staff, the staff adds thick liquid raw materials (guar gum, boron powder and glycerine) in liquid storage tank 4 through charge door 18, the manual work sets for the churning time through PLC controller 1, start agitator motor 17 and stir the thick liquid raw materials, after the stirring, PLC controller 1 self-closing agitator motor 17, accomplish reinforced operation. When the slurry liquid level rises to the position monitored by the upper liquid level meter 15, the upper liquid level meter 15 transmits a signal to the PLC controller 1, and the acousto-optic alarm 16 sends out an alarm signal to remind a worker that the slurry cannot be fed again.
When the inside needs clearance of liquid reserve tank 4, can dismantle the flange of 9 exports of liquid suction pipe and 3 imports of hole sealing grouting pump subassembly, discharge through 9 pipes of drawing liquid.
The PLC controller 1, the display screen 2, the hole sealing grouting pump assembly 3, the electromagnetic valve 6, the pressure gauge 7, the pressure sensor 8, the upper liquid level meter 15, the lower liquid level meter 14, the stirring motor 17 and other parts in the utility model are all in the prior art and are commercially available, so the specific structure and the working principle are not repeated. Further, automatic control between the PLC controller 1 and each of the above-described hardware is performed, and thus, a new computer program is not involved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. Colliery is gas drainage drilling hole sealing control system in pit, its characterized in that: including the PLC controller, the display screen, hole sealing slip casting pump package spare, the liquid reserve tank, the slip casting pipe, the solenoid valve, manometer and pressure sensor, hole sealing slip casting pump package spare export and slip casting pipe access connection, hole sealing slip casting pump package spare import is passed through the liquid suction pipe and is connected with the liquid reserve tank, the slip casting pipe stretches into the first bag in the drilling along being on a parallel with drilling central line direction, hole sealing section and second bag are inside, solenoid valve and manometer are installed on the slip casting pipe, pressure sensor connects between the output of manometer and the input of PLC controller, the output of PLC controller respectively with the display screen, the input of solenoid valve and the input of hole sealing slip casting pump package spare are connected.
2. The system for controlling the hole sealing of the coal mine underground gas extraction drill hole according to claim 1, characterized in that: the liquid reserve tank is the container of cask shape, and lateral part and upside do not are equipped with down level gauge and last level gauge under the liquid reserve tank, and the output of lower level gauge and last level gauge all is connected with the input of PLC controller, and the output of PLC controller still control connection has the audible-visual annunciator.
3. The system for controlling the hole sealing of the coal mine underground gas extraction drill hole according to claim 2, characterized in that: the liquid reserve tank top center department is equipped with agitator motor, and the eccentric department in liquid reserve tank top is equipped with the charge door, and agitator motor's main shaft is perpendicular downwards and coaxial coupling has the (mixing) shaft that stretches into the liquid reserve tank inside, is equipped with stirring vane on the (mixing) shaft, and the output and the agitator motor control of PLC controller are connected.
4. The system for controlling hole sealing of the underground coal mine gas extraction drill hole according to claim 1, 2 or 3, wherein: the bottom of the liquid storage tank is provided with a supporting leg, the liquid pumping pipe is provided with a manual valve, and the inlet end of the liquid pumping pipe is connected to the bottom of the liquid storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123018978.5U CN216360991U (en) | 2021-12-03 | 2021-12-03 | Control system for drilling and sealing holes for underground gas extraction of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123018978.5U CN216360991U (en) | 2021-12-03 | 2021-12-03 | Control system for drilling and sealing holes for underground gas extraction of coal mine |
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| Publication Number | Publication Date |
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| CN216360991U true CN216360991U (en) | 2022-04-22 |
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| CN202123018978.5U Active CN216360991U (en) | 2021-12-03 | 2021-12-03 | Control system for drilling and sealing holes for underground gas extraction of coal mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115559687A (en) * | 2022-10-20 | 2023-01-03 | 中国矿业大学(北京) | Pulse type grouting hole sealing device and hole sealing method |
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2021
- 2021-12-03 CN CN202123018978.5U patent/CN216360991U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115559687A (en) * | 2022-10-20 | 2023-01-03 | 中国矿业大学(北京) | Pulse type grouting hole sealing device and hole sealing method |
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