CN107762550A - A kind of mash gas pumping drilling method for sealing - Google Patents
A kind of mash gas pumping drilling method for sealing Download PDFInfo
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Abstract
The invention belongs to gas extraction manufacture field, and disclosing a kind of mash gas pumping drilling method for sealing includes：Choose bore position；Switch is opened, drilling machine is started working；Certain depth is pierced toward ground, methane Concentration Measurement device can detect the gas density inside coal area, can be shown in display instrument；The gas density that display instrument is shown reaches numerical value and opens air exhauster, and methane gas is extracted out, is stored in inside expansion box；Slurries are placed on inside slurry can, and moisture detector detects the humidity of slurries, and slurries can enter drill hole from Grouting Pipe, and drilling machine gos up, and slurries humidity is higher, can quickly fill up vacancy position.The present invention solves during gas pumping chance ickings blockage problem, during sealing of hole, can effectively ensure the humidity of slurries, during injection hole, will not quickly cool down, and it is not tight to avoid drilling and sealing, aperture gas leak phenomenon.
Description
Technical Field
The invention belongs to the field of gas extraction manufacturing industry, and particularly relates to a gas extraction drilling and hole sealing method.
Background
Gas is an associated gas in coal seams, which is produced in various forms from the coal seam during coal mining and is one of the most common harmful gases in mines. The concrete is embodied in two aspects: (1) gas has the risk of combustion explosion, (2) coal and gas outburst. And they have the characteristics of difficult prediction, along with the continuous downward extension of coal mining, the emission of coal mine gas is also increased, the production progress of the coal mine is severely limited, and the safety production of the coal mine is greatly restricted.
When the gas concentration reaches a very high value, serious fire disasters can happen on a little spark, the damage degree of coal bed gas disasters is large, casualty accidents are more, the existing gas extraction method discharges the gas in a coal area through a drilling and hole sealing method, but the method is not perfect, the gas extraction speed is slow, the drilling process takes more time, the problems that the gas concentration in the coal area cannot be effectively detected and the like are always solved, the hole sealing and sealing are not tight enough, and gas leaks out, so that the production of a coal mine is limited.
In summary, the problems of the prior art are as follows: the existing gas extraction method discharges gas in a coal area through a drilling hole sealing method, but the method is not perfect enough, the gas extraction speed is slow, the drilling process takes more time, the problems that the gas concentration of the coal area cannot be effectively detected and the like are always solved, the sealing hole sealing is not tight enough, gas leaks out, and the production of a coal mine is limited.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a gas extraction drilling and hole sealing method.
The invention is realized in such a way that the method for sealing the gas extraction drill hole comprises the following steps:
selecting a drilling position;
turning on a switch, and starting the drilling machine to work;
drilling a certain depth into the ground, wherein the gas concentration detector can detect the gas concentration in the coal area and can display the gas concentration on a display instrument;
step four, opening an exhaust fan when the gas concentration displayed by the display instrument reaches a numerical value, and exhausting the gas and storing the gas in a gas storage box;
and step five, placing the slurry in a slurry storage tank, detecting the humidity of the slurry by a humidity detector, enabling the slurry to enter a drilling position from a grouting pipe, lifting the drilling machine, enabling the slurry to have higher humidity, and quickly filling the vacant position.
A gas extraction drilling and sealing device of a gas extraction drilling and sealing method comprises the following steps: the device comprises a slurry storage tank, a humidity detector, a display instrument, an air duct, a grouting pipe, a drilling machine, a machine body, an air storage tank and an exhaust fan; the pulp storage tank is fixed above the machine body through a bracket; the humidity detector is in keyed joint with the inside of the slurry storage tank, and the display instrument is arranged outside the slurry storage tank; the grouting pipe is arranged inside the machine body; the upper end of the drilling machine is fixed on the machine body, and a gas concentration detector is arranged in the drilling machine; the exhaust fan is fixed outside the machine body, one end of the exhaust fan is connected with the air guide pipe in an expanded mode, and the other end of the exhaust fan is connected with the air storage box in an expanded mode; the air storage box is fixed beside the exhaust fan.
Furthermore, the drilling machine, the display instrument and the humidity detector are connected with a power supply through leads.
Furthermore, the air duct expansion joint is sealed by sealant.
Further, the gas concentration detector is connected with a display instrument through a data line.
Further, the drilling machine is provided with a vent hole on the outer part.
Further, in step five, the detecting step of the moisture detector is as follows:
converting a humidity signal into a high-low digital level signal by a humidity sensor;
secondly, the singlechip processes the sent digital quantity signal;
step three, displaying the measured humidity value through an LCD;
and step four, feeding back the detected humidity value to the slurry storage tank.
The cyclic covariate function of the humidity signal receiving signal comprises:
the humidity signal comprises an MPSK humidity signal obeying the S α S distributed noise, which can be expressed as:
where E is the average power of the humidity signal,M＝2 k m =1,2.. M, q (T) denotes a rectangular pulse waveform, T denotes a symbol period, f denotes a symbol period c Represents the carrier frequency, phi 0 Representing the initial phase, if (if it is a condition here: if) w (t) is non-gaussian noise obeying the S α S distribution, its self-covariate function is defined as:
wherein (x (t- τ)) <p-1> ＝|x(t-τ)| p-2 x*(t-τ)，γ x(t-τ) Is the dispersion coefficient of x (t), the cyclic covariance of x (t) is defined as:
where ε is the cycle frequency and T is one symbol period;
when the single chip microcomputer estimates the jumping time of each jump and the normalized mixed matrix column vector and the frequency hopping frequency corresponding to each jump by using a clustering algorithm, the method comprises the following steps:
in the first step, at time P (P =0,1,2, … P-1), the pairsClustering the expressed frequency values to obtain the number of clustering centersIndicating the number of carrier frequencies present at time p,the cluster centers represent the carrier frequencies, respectivelyRepresenting;
in the second step, for each sampling time P (P =0,1,2, … P-1), a clustering algorithm is used to pairClustering is carried out to obtainA cluster center ofRepresents;
third, for allAveraging and rounding to obtain an estimate of the number of source humidity signalsNamely, it is
The fourth step is to find outAt the time of (1), by p h Representing p by successive values for each segment h Calculate the median value byIndicates that the l-th segment is connected with p h Median value of (1), thenRepresents an estimate of the ith frequency hop time instant;
a fifth step of estimating the estimated values obtained in the second stepAnd estimating the frequency hopping time estimated in the fourth step to obtain the frequency hopping time corresponding to each hopA mixed matrix column vectorThe concrete formula is as follows:
here, theIndicating correspondence of the l-th hopA respective mixed matrix column vector estimate;
sixthly, estimating the carrier frequency corresponding to each hop, and usingIndicating correspondence of the l-th hopThe calculation formula of the frequency estimated value is as follows:
the singlechip splices time-frequency domain frequency hopping source humidity signals among different frequency hopping points, and the method comprises the following specific steps:
first, estimating the corresponding of the first hopAt an angle of incidence ofIndicating the incident angle corresponding to the nth source humidity signal of the ith jump,the calculation formula of (a) is as follows:
representing the nth mixing matrix column vector obtained by the estimation of the l hopC represents the speed of light, i.e., v c ＝3×10 8 M/s;
secondly, judging the corresponding relation between the source humidity signal estimated in the l (l =2,3, …) jump and the source humidity signal estimated in the first jump, wherein the judgment formula is as follows:
wherein m is n (l) M < th > representing the estimate of the l < th > hop n (l) The humidity signal and the nth humidity signal estimated by the first jump belong to the same source humidity signal;
thirdly, splicing humidity signals which are estimated at different frequency hopping points and belong to the same source humidity signal together to be used as the final time-frequency domain source humidity signal estimation, and using Y to estimate the humidity signals n (P, q) represents a time-frequency domain estimate of the nth source humidity signal at a time-frequency point (P, q), P =0,1,2 fft 1, i.e.
The invention has the advantages and positive effects that: the invention has simple structure and convenient operation, can improve the drilling depth through the drilling machine, solves the problem of coal dust blockage in the gas extraction process, can effectively ensure the humidity of slurry in the hole sealing process, can not be quickly cooled in the injection drilling process, and avoids the phenomena of untight hole sealing of a drilled hole and air leakage of an orifice.
Drawings
Fig. 1 is a flow chart of a gas extraction borehole sealing method provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of the gas extraction drilling and hole sealing device provided by the embodiment of the invention;
FIG. 3 is a diagram of a display instrument connected to a moisture detector and a gas concentration detector according to an embodiment of the present invention;
in the figure 1, a slurry storage tank; 2. a humidity detector; 3. a display instrument; 4. an air duct; 5. a grouting pipe; 6. a drilling machine; 7. a body; 8. a gas storage tank; 9. an exhaust fan.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to fig. 1 and 2.
The structure of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the method for sealing a gas extraction borehole provided by the embodiment of the invention includes the following steps:
s101, selecting a drilling position;
s102, turning on a switch, and starting the drilling machine to work;
s103, drilling into the ground to a certain depth, wherein the gas concentration detector can detect the gas concentration in the coal area and can display the gas concentration on a display instrument;
s104, displaying that the gas concentration displayed by the instrument reaches a numerical value, opening an exhaust fan, extracting gas, and storing the gas in a gas storage box;
s105, the slurry is placed in the slurry storage tank, the humidity detector detects the humidity of the slurry, the slurry can enter the drilling position from the grouting pipe, the drilling machine rises back, the humidity of the slurry is high, and the vacant position can be filled quickly.
As shown in fig. 2, the gas extraction borehole sealing device of the gas extraction borehole sealing method according to the embodiment of the present invention includes: the device comprises a slurry storage tank 1, a humidity detector 2, a display instrument 3, an air guide pipe 4, a grouting pipe 5, a drilling machine 6, a machine body 7, a gas storage tank 8 and an exhaust fan 9; the pulp storage tank 1 is fixed above the machine body 7 through a bracket; the humidity detector 2 is connected inside the slurry storage tank 1 in a key mode, and the display instrument 3 is installed outside the slurry storage tank 1; the grouting pipe 5 is arranged inside the machine body 7; the upper end of the drilling machine 6 is fixed on the machine body 7, and a gas concentration detector is arranged in the drilling machine; the exhaust fan 9 is fixed outside the machine body 7, one end of the exhaust fan is connected with the air guide pipe 4 in an expanded mode, and the other end of the exhaust fan is connected with the air storage box 8 in an expanded mode; the air storage box 8 is fixed beside the exhaust fan 9.
Further, the drilling machine 6, the display instrument 3 and the humidity detector 2 are connected with a power supply through leads.
Furthermore, the expansion joint of the air duct 4 is sealed by sealant.
Further, the gas concentration detector is connected with a display instrument through a data line.
Further, the drilling machine 6 is provided with a vent hole on the outside.
Further, in step five S105, the detecting step of the humidity detector is as follows:
converting a humidity signal into a high-low digital level signal by a humidity sensor;
secondly, the singlechip processes the sent digital quantity signal;
step three, displaying the measured humidity value through an LCD;
and step four, feeding back the detected humidity value to the slurry storage tank.
The cyclic covariate function of the humidity signal receiving signal comprises:
the humidity signal comprises an MPSK humidity signal obeying the S α S distributed noise, which can be expressed as:
where E is the average power of the humidity signal,M＝2 k m =1,2, … M, q (T) denotes a rectangular pulse waveform, T denotes a symbol period, f denotes a symbol period c Represents the carrier frequency, phi 0 Representing the initial phase, if (if it is a condition here: if) w (t) is non-gaussian noise obeying the S α S distribution, its self-covariate function is defined as:
wherein (x (t- τ)) <p-1> ＝|x(t-τ)| p-2 x*(t-τ)，γ x (t- τ) is the dispersion coefficient of x (t), then the cyclic covariance of x (t) is defined as:
where ε is the cycle frequency and T is one symbol period;
when the single chip microcomputer estimates the jumping time of each jump and the normalized mixed matrix column vector and the frequency hopping frequency corresponding to each jump by using a clustering algorithm, the method comprises the following steps:
in the first step, at time P (P =0,1,2, … P-1), the pairsClustering the expressed frequency values to obtain the number of clustering centersIndicating the number of carrier frequencies present at time p,the cluster centers represent the carrier frequencies, respectivelyRepresents;
in the second step, for each sampling time P (P =0,1,2, … P-1), a clustering algorithm is used to pairClustering is carried out to obtainA cluster center ofRepresents;
third, for allAveraging and rounding to obtain an estimate of the number of source humidity signalsNamely, it is
The fourth step is to find outAt the time of (1), by p h Representing, for each segment, the successive values of p h Calculate the median value byIndicates that the l-th segment is connected with p h Median value of (1), thenRepresents an estimate of the ith frequency hop time instant;
a fifth step of estimating the estimated values obtained in the second stepAnd estimating the frequency hopping time estimated in the fourth step to obtain the frequency hopping time corresponding to each hopA mixed matrix column vectorThe concrete formula is as follows:
here, theIndicating correspondence of the l-th hopA respective mixed matrix column vector estimate;
sixth, each hop is estimatedCorresponding carrier frequency ofIndicating correspondence of the l-th hopThe calculation formula of the frequency estimated value is as follows:
the singlechip splices time-frequency domain frequency hopping source humidity signals among different frequency hopping points, and the method comprises the following specific steps:
first, estimating the corresponding of the first hopAt an angle of incidence ofIndicating the incident angle corresponding to the nth source humidity signal of the ith jump,the calculation formula of (a) is as follows:
representing the nth mixing matrix column vector obtained by the l hop estimationC represents the speed of light, i.e., v c ＝3×10 8 M/s;
the second step, judging the corresponding relation between the estimated source humidity signal of the l (l =2,3, …) hop and the estimated source humidity signal of the first hop, and judging the formula as follows:
wherein m is n (l) M < th > hop estimate n (l) The humidity signal and the nth humidity signal estimated by the first jump belong to the same source humidity signal;
thirdly, splicing humidity signals which are estimated at different frequency hopping points and belong to the same source humidity signal together to be used as the final time-frequency domain source humidity signal estimation, and using Y to estimate the humidity signals n (P, q) represents a time-frequency domain estimate of the nth source humidity signal at a time-frequency point (P, q), P =0,1,2 fft 1, i.e.
The working principle of the invention is as follows: the drilling position is selected, the switch is turned on, the drilling machine 6 starts to work and drills into the ground to a certain depth, and the gas concentration detector can detect the gas concentration in the coal area and can display the gas concentration on the display instrument 3. The gas concentration that display instrument 3 shows reaches certain numerical value and opens air exhauster 9, takes out gas, stores inside gas storage tank 8. The thick liquid is placed inside thick liquid storage tank 1, and moisture detector 2 can detect the humidity of thick liquid, and the thick liquid can enter into drilling department from the slip casting pipe, and drilling machine 6 can slowly rise back, and thick liquid humidity is higher, can fill vacancy position fast, prevents that gas from leaking. The gas extraction drilling and hole sealing method is simple in structure and convenient to operate. Through the drilling machine, the drilling depth can be improved, the problem that the coal dust is blocked in the gas extraction process is solved, the humidity of slurry can be effectively guaranteed in the hole sealing process, the slurry cannot be rapidly cooled in the injection drilling process, and the phenomena that the drilling hole sealing is not tight and the air leakage of an orifice is avoided.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (6)
1. The method for sealing the gas extraction drill hole is characterized by comprising the following steps:
selecting a drilling position;
turning on a switch, and starting the drilling machine to work;
step three, drilling into the ground to a certain depth, wherein the gas concentration detector can detect the gas concentration in the coal area and can display the gas concentration on a display instrument;
fourthly, opening an exhaust fan when the gas concentration displayed by the display instrument reaches a numerical value, extracting the gas and storing the gas in a gas storage box;
placing the slurry in a slurry storage tank, detecting the humidity of the slurry by a humidity detector, enabling the slurry to enter a drilling position from a grouting pipe, raising a drilling machine, enabling the slurry to have higher humidity, and quickly filling the vacant position;
the detecting step of the moisture detector comprises: the humidity sensor converts the humidity signal into a high-low digital level signal; the singlechip processes the sent digital quantity signal; displaying the measured humidity value through an LCD; feeding back the detected humidity value to the pulp storage tank;
the cyclic covariate function of the humidity signal receiving signal comprises:
the humidity signal comprises an MPSK humidity signal obeying the S α S distributed noise, which can be expressed as:
where E is the average power of the humidity signal,M＝2 k ，m＝1,m, q (T) represents a rectangular pulse waveform, T represents a symbol period, f c Represents the carrier frequency, phi 0 Representing the initial phase, if (if it is a condition here: if) w (t) is non-gaussian noise obeying the S α S distribution, its self-covariate function is defined as:
wherein (x (t-tau)) <p-1> ＝|x(t-τ) p-2 x*(t-τ)，γ x(t-τ) Is the dispersion coefficient of x (t), the cyclic covariance of x (t) is defined as:
where ε is the cycle frequency and T is one symbol period;
when the single chip microcomputer estimates the jumping time of each jump and the normalized mixed matrix column vector and the frequency hopping frequency corresponding to each jump by using a clustering algorithm, the method comprises the following steps:
in the first step, at time P (P =0,1,2, … P-1), the pairsClustering the expressed frequency values to obtain the number of clustering centersIndicating the number of carrier frequencies present at time p,the cluster centers represent the carrier frequencies, respectivelyRepresents;
in the second step, for each sampling time P (P =0,1,2, … P-1), a clustering algorithm is used to pairClustering is carried out to obtainA cluster center, usingRepresents;
third, for allAveraging and rounding to obtain an estimate of the number of source humidity signalsNamely, it is
The fourth step is to find outAt the time of (1), by p h Representing p by successive values for each segment h Calculate the median value byIndicates that the l-th segment is connected with p h Median value of (1), thenRepresents an estimate of the ith frequency hop time instant;
a fifth step of estimating the estimated values obtained in the second stepAnd estimating each frequency hopping time estimated in the fourth stepJump correspondingA mixed matrix column vectorThe concrete formula is as follows:
here, theIndicating correspondence of the l-th hopA respective mixed matrix column vector estimate;
sixthly, estimating the carrier frequency corresponding to each hop, and usingIndicating correspondence of the l-th hopThe frequency estimation value is calculated according to the following formula:
the singlechip splices time-frequency domain frequency hopping source humidity signals among different frequency hopping points, and the method comprises the following specific steps:
first, estimating the corresponding of the first hopAt an angle of incidence ofIndicating the incident angle corresponding to the nth source humidity signal of the ith jump,the calculation formula of (a) is as follows:
representing the nth mixing matrix column vector obtained by the estimation of the l hopC represents the speed of light, i.e., v c ＝3×10 8 M/s;
the second step, judging the corresponding relation between the estimated source humidity signal of the l (l =2,3, …) hop and the estimated source humidity signal of the first hop, and judging the formula as follows:
wherein m is n (l) M < th > hop estimate n (l) The humidity signal and the nth humidity signal estimated by the first jump belong to the same source humidity signal;
thirdly, splicing humidity signals which are estimated at different frequency hopping points and belong to the same source humidity signal together to be used as the final time-frequency domain source humidity signal estimation, and using Y to estimate the humidity signals n (P, q) represents a time-frequency domain estimate of the nth source humidity signal at a time-frequency point (P, q), P =0,1,2 fft 1, i.e.
2. A gas extraction borehole sealing device according to the gas extraction borehole sealing method of claim 1, characterized by comprising: the device comprises a slurry storage tank, a humidity detector, a display instrument, an air duct, a grouting pipe, a drilling machine, a machine body, an air storage tank and an exhaust fan;
the pulp storage tank is fixed above the machine body through a bracket;
the humidity detector is in keyed connection with the inside of the slurry storage tank, and the display instrument is installed outside the slurry storage tank;
the grouting pipe is arranged inside the machine body; the upper end of the drilling machine is fixed on the machine body, and a gas concentration detector is arranged in the drilling machine;
the exhaust fan is fixed outside the machine body, one end of the exhaust fan is connected with the air guide pipe in an expanded mode, and the other end of the exhaust fan is connected with the air storage box in an expanded mode;
the air storage box is fixed beside the exhaust fan.
3. The gas extraction drilling and sealing device according to claim 2, wherein the drilling machine, the display instrument and the moisture detector are connected to a power supply through wires.
4. The gas extraction borehole sealing device according to claim 2, wherein the gas guide tube expansion joint is sealed with a sealant.
5. The gas extraction borehole sealing device according to claim 2, wherein the gas concentration detector is connected to a display instrument via a data line.
6. The gas extraction borehole sealing device according to claim 2, wherein a vent hole is provided outside the drilling machine.
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| CN201711078144.9A CN107762550B (en) | 2017-11-06 | 2017-11-06 | Gas extraction drilling hole sealing method |
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| CN201711078144.9A CN107762550B (en) | 2017-11-06 | 2017-11-06 | Gas extraction drilling hole sealing method |
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| CN110219615A (en) * | 2019-05-31 | 2019-09-10 | 山东科技大学 | A kind of coal seam pulsed infusion borehole sealing device and method for sealing |
| CN116427996A (en) * | 2023-04-18 | 2023-07-14 | 淮北工业建筑设计院有限责任公司 | Management system and method for realizing grouting filling by using ground gas extraction pipe |
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Effective date of registration: 20211117 Address after: 467000 No. 21 miner Road, Henan, Pingdingshan Patentee after: PINGDINGSHAN TIANAN COAL MINING Co.,Ltd. Patentee after: SICHUAN University Patentee after: CHINA PINGMEI SHENMA ENERGY CHEMICAL GROUP Co.,Ltd. Address before: 610065, No. 24, south section of Ring Road, Sichuan, Chengdu Patentee before: SICHUAN University |
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