CN204267019U - The device of simultaneous determination QST value - Google Patents

The device of simultaneous determination QST value Download PDF

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Publication number
CN204267019U
CN204267019U CN201420694070.7U CN201420694070U CN204267019U CN 204267019 U CN204267019 U CN 204267019U CN 201420694070 U CN201420694070 U CN 201420694070U CN 204267019 U CN204267019 U CN 204267019U
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China
Prior art keywords
auger stem
piston
measuring tube
cylinder body
simultaneous determination
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Withdrawn - After Issue
Application number
CN201420694070.7U
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Chinese (zh)
Inventor
于斌
谭强
杨智文
匡铁军
梁坤
段宏飞
纪润清
张艳群
高明忠
张茹
谢晶
李圣伟
邱治强
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Sichuan University
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Sichuan University
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Priority to CN201420694070.7U priority Critical patent/CN204267019U/en
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Withdrawn - After Issue legal-status Critical Current
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Abstract

The device of simultaneous determination QST value, belongs to technical field of mine safety.Comprise auger stem system, cutting catcher bag with holes, gravity sensor, air pump and data acquisition unit, auger stem system comprises the first auger stem and auxiliary screw drilling rod that are connected, the cylinder body of hollow is provided with in the middle part of first auger stem inner chamber, inwall in the middle part of cylinder body is provided with the dop for fixed piston bottom position, piston nose is the piston cavity volume matched with piston that choke cover surrounds into the first auger stem, choke adjoins the first auger stem outer wall in overlapping and cavity place is provided with temperature pick up, first auger stem inwall is provided with the air pipe be connected with cylinder body, first auger stem inner chamber is also provided with measuring tube, measuring tube runs through the inside of cylinder body and piston, final section auxiliary screw drilling rod afterbody is provided with hole packer, cutting catcher bag with holes is arranged on gravity sensor, and air pump is connected with air pipe, and data acquisition unit is connected with measuring tube afterbody, be applicable to the prediction of mine protrusion-dispelling.

Description

The device of simultaneous determination QST value
Technical field
The utility model belongs to technical field of mine safety, especially relates to the device of simultaneous determination QST value.
Background technology
As the main body energy of China, the exploitation of coal and the safety problem in colliery are the focuses of research always.But down-hole coal bed tax is deposited and mining conditions complexity, and China's coal seam gas-bearing capacity is general higher, and wherein the coal seam of more than 50% is high gas layer, high prominent mine accounts for 44% of national mine sum.Coal and gas prominent is serious, and danger coefficient is high, and the disaster accident that coal mine gas from explosion, high-temperature operation cause is of common occurrence, and therefore, colliery unit must carry out outburst prediction and take effective control measures.
At present, more for predicting underground coal mine work plane coal and gas prominent method that is dangerous or outburst prevention measures validity check, wherein, the most frequently used is composite index method prediction Driving Face in Coal Tunnel outburst hazard.The index of composite index method has gas inrush initial velocity (Q value) and coal powder quantity of bore (S value).In actual measurement process, normally first boring is collected drilling cuttings and is measured S value, then exits drilling rod, in boring, send into hole packer, after sealing of hole, just measures Q value.Gas inrush initial velocity is the instantaneous value of holing when terminating rear 2min, high requirement and restriction is had to Measuring Time, but in practical operation, from exiting drilling rod, to sending into hole packer, to realize the operation of sealing of hole loaded down with trivial details consuming time, and wait surveyed Q value after, hole packer need be exited again send into drilling rod and continue to creep into, and and so forth.Such measuring process workload is huge, if time assurance is improper, even can not measure effective Q value.In air drill process, drilling rod and rib high-speed friction, temperature sharply raises, uninterruptedly can send into air to giving in boring in rig process, in boring, oxygen is sufficient, and gas bearing capacity is large simultaneously, when drilling rod temperature reaches certain value, very easily cause coal burning or gas explosion, during historical facts or anecdotes, measure in drilling process temperature in borehole (T value) of holing, prevention mine safety hidden danger is played an important role.And current method measures alone Q value, S value, T value.In order to predict Driving Face in Coal Tunnel outburst hazard better, need badly a kind of can the device of simultaneous determination QST value.
Utility model content
The utility model is overcome drilling tool in prior art can not realize sealing of hole and Q, S, T value needs the shortcoming of independent measurement, a kind of device of simultaneous determination QST value is provided, can realize can carrying out the measurement of Q value by sealing of hole, and realize by single device the simultaneous determination that Q, S, T tri-be worth.
The utility model solves the technical scheme that its technical problem adopts: the device of simultaneous determination QST value, comprise auger stem system, cutting catcher bag with holes, gravity sensor, air pump and data acquisition unit, data acquisition unit comprises gas flow and takes into account radio communication device, described auger stem system comprises the first auger stem and some joint auxiliary screw drilling rods, auxiliary screw drilling rod is connected to the afterbody of the first auger stem, the cylinder body of hollow is provided with in the middle part of first auger stem inner chamber, its front end is provided with opening and back-end closure, cylinder body is fixed by connection strap unit, inwall avris in the middle part of cylinder body is provided with the dop of the final position of retracting for limited piston, the front portion of piston is cone, the rear portion of piston is cylinder, the internal diameter of cylindrical external diameter and cylinder body matches, piston nose is the piston cavity volume matched with piston that choke cover surrounds into the first auger stem, there is measurement cavity piston cavity volume front end, the gas gushed out when measuring cavity for holding the boring of auger stem system, adjoin the first auger stem outer wall in choke cover and measure cavity place and be provided with the temperature pick up that can carry out radio communication, first auger stem inwall is provided with the air pipe be connected with cylinder body, first auger stem inner chamber is also provided with measuring tube, measuring tube runs through the inside of cylinder body and piston, the air pipe and measuring tube that are connected with air pipe and the measuring tube of the first auger stem is respectively provided with in the inner chamber of auxiliary screw drilling rod, the outside spacers of measuring tube is provided with fixed strip unit, in the middle part of the inner chamber by fixed strip unit measuring tube being fixed on auxiliary screw drilling rod, the afterbody of final section auxiliary screw drilling rod is provided with hole packer, described cutting catcher bag with holes is arranged on gravity sensor, for whole drilling cuttings of discharging in gathering screw drill pipe system drilling process, described air pump is connected with air pipe, air pump by air pipe to carrying out cylinder body inflation or bleeding, data acquisition unit is connected with measuring tube afterbody and gravity sensor.
Concrete, described connection strap unit comprises three around outer wall of cylinder block distribution and is mutually the connection strap of 120 ° of angles.
Concrete, described fixed strip unit comprises three around the distribution of measuring tube outer wall and is mutually the fixed strip of 120 ° of angles.
Further, described air pipe is three, is arranged at the middle part that three are attached at the fixed strip of auger stem inwall respectively.
Preferably, be that in the auxiliary screw drilling rod of 1m, 3 fixed strip unit are set in every segment length, lay respectively at apart from this section of auxiliary screw drilling rod port 0.2m, 0.5m and 0.8m place.
Preferably, the length of described fixed strip and measuring tube contact site is 20mm.
Further, described radio communication device is nRF905 multichannel monolithic transceiving chip.
Further, the material of the first auger stem and auxiliary screw drilling rod is low chromium nickel oxidation resistant steel.
Further, the external diameter of auger stem system is 42mm, and the external diameter of described hole packer from top to bottom increases gradually, and hole packer maximum outside diameter is 45mm.
Preferably, the length of the first auger stem is 2m, and the length of described measurement cavity is 0.5m.
The beneficial effects of the utility model are: can measure Q value under sealing of hole condition; and convenient, accurately, integrally real time record Q value, S value and T value; when measured value occurs abnormal; corresponding safeguard measure can be taked in time; the safety of effective raising coal mine drilling, ensures the personal safety of staff and the safety of mine.The utility model is applicable to mine safety exploitation, is particularly useful for the prediction of mine protrusion-dispelling.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model auger stem system;
Fig. 2 is the sectional view of the first auger stem of the present utility model;
Fig. 3 is the cross-sectional structure schematic diagram of Fig. 2;
Fig. 4 is the structural representation that the piston pushed forward of the utility model auger stem system realizes when closing wind;
Fig. 5 is the utility model structural representation in use;
Wherein, 1 is auger stem system, and 2 is cylinder body, 3 is piston, and 4 is choke cover, and 5 is measuring tube, 6 is temperature pick up, and 7 is hole packer, and 8 is cutting catcher bag with holes, 9 is gravity sensor, and 10 is air pump, and 11 is data acquisition unit, 12 is connection strap, 13 is dop, and 14 is fixed strip, and 15 is air pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, describe the technical solution of the utility model in detail.
As shown in Fig. 1 to 5, the device of simultaneous determination QST value of the present utility model, comprises auger stem system 1, cutting catcher bag with holes 8, gravity sensor 9, air pump 10 and data acquisition unit 11, and data acquisition unit 11 comprises gas flow and takes into account radio communication device,
Described auger stem system comprises the first auger stem and some joint auxiliary screw drilling rods, auxiliary screw drilling rod is connected to the afterbody of the first auger stem, the cylinder body 2 of hollow is provided with in the middle part of first auger stem inner chamber, its front end is provided with opening and back-end closure, with auger stem system, the port that cylinder body and drill pipe system top match is the front end of cylinder body, cylinder body 2 is fixed by connection strap unit, described connection strap unit comprises three around outer wall of cylinder block distribution and is mutually the connection strap of 120 ° of angles, and namely cylinder body is connected by connection strap 12 with drilling rod inner chamber, inwall avris in the middle part of cylinder body 2 is provided with dop 13, dop 13, for the final position that limited piston 3 is retracted, dop 13 contacts with piston 3 bottom, the front portion of piston is cone, the rear portion of piston is cylinder, the internal diameter of cylindrical external diameter and cylinder body 2 matches, piston 3 front end is the piston cavity volume matched with piston that choke cover 4 and the first auger stem surround into, gas is filled with in cylinder body 2, the rear portion of piston 3 loads in cylinder body, its front portion is positioned at outside cylinder body, there is measurement cavity piston cavity volume front end, the gas gushed out when measuring cavity for holding the boring of auger stem system, so that it derives from measuring tube, preferably, the length of the first auger stem is 2m, the length of described measurement cavity is 0.5m, now drawing-off gas effect is better.Adjoin the first auger stem outer wall in choke cover 4 and measure cavity place and be provided with the temperature pick up 6 that can carry out radio communication, first auger stem inwall is provided with the air pipe 15 be connected with cylinder body 2, first auger stem 1 inner chamber is also provided with measuring tube 5, and measuring tube 5 runs through the inside of cylinder body 2 and piston 3, choke cover 4 can effectively realize closing wind, namely when drilling rod stops creeping into and hole packer is delivered to after suitable position realizes sealing of hole, by air pump 10 to insufflation gas in cylinder body 2, piston 3 is pushed into and overlaps 4 close contacts with choke by the air pressure in cylinder body, now piston 3 stretches out, its bottom does not contact with dop 13, choke cover 4 can be intercepted drilling rod front end and be flowed by boring and extraneous air, then can form the gas surveying room with external environment before the first auger stem, gas inrush initial velocity Q value can be recorded by the data acquisition unit 11 be connected with measuring tube, when measure complete bleed from cylinder body 2 time, piston 3 is pushed back cylinder body by external pressure, now piston is retracted, when being retracted into final position, dop 13 contacts with the bottom of piston 3, return too much to prevent piston 3.
Inflate cylinder body rapidly to reach and bleed, described air pipe has three, and as shown in Figure 3, three air pipes are arranged at the middle part that three are attached at the fixed strip of auger stem inwall respectively, and namely three air pipes are mutually 120 ° of angle distributions.Air pipe, in the middle of fixed strip, is equivalent to the design of hollow.
The air pipe and measuring tube that are connected with air pipe and the measuring tube thereof of the first auger stem is respectively provided with in the inner chamber of auxiliary screw drilling rod, air pipe and measuring tube is provided with in the inner chamber of i.e. auxiliary screw drilling rod, its air pipe is connected with the air pipe of the first auger stem, and its measuring tube is connected with the air pipe of the first auger stem; The outside spacers of measuring tube is provided with fixed strip unit, in the middle part of the inner chamber by fixed strip unit measuring tube being fixed on auxiliary screw drilling rod, described fixed strip unit comprises three around the distribution of measuring tube outer wall and is mutually the fixed strip of 120 ° of angles, fixed strip plays fixation measuring pipe, its radial distribution is identical with connection strap, be arrange 3 sections of fixed strips in the auger stem of 1m every section of specification, lay respectively at 0.2m, 0.5m and 0.8m place.The length of described fixed strip and measuring tube contact site is 20mm, namely in Fig. 2 below air pipe to the length of the fixed strip between measuring tube be 20mm.When any two joint auger stems are end to end, measuring tube realizes effective airtight docking.The afterbody of final section auxiliary screw drilling rod is provided with hole packer 7, and its front portion can connect auger stem, and rear portion can connect rig, can not continue to creep into or creep at need in auger stem system, can be fastened in boring realize sealing of hole effect by the ickings cut out;
In use, gravity sensor 9 is arranged on drilling orifice position, cutting catcher bag 8 with holes is suspended on gravity sensor, collecting bag carries two circular cavities, and top hole is used as drilling rod to be passed through, and below hole is used as to release drilling cuttings, after completing one-shot measurement, whole drilling cuttings can be released by below hole, then continue to creep into, collect drilling cuttings next time;
Air pump is connected with the air pipe in drilling rod by flexible pipe, to cylinder body inflation and can bleed, with in good time pushed forward with return piston backward, the Gas-Flow gauge of data acquisition unit 11 is connected with measuring tube afterbody by flexible pipe, sealing of hole is realized by hole packer, form gas surveying room at auger stem system 1 leading portion, successfully can measure gas inrush initial velocity Q value by measuring tube; Described cutting catcher bag with holes is arranged on gravity sensor 9, for whole drilling cuttings of discharging in gathering screw drill pipe system drilling process, then measures coal powder quantity of bore S value by gravity sensor 9, and passes to data acquisition unit 11; Temperature pick up 6 can real-time detection boring temperature in borehole T value, and is sent out bit head megadyne temperature angle value to data acquisition unit 11 by its radio transmitting device, so that data acquisition unit 11 real time record T value.
Temperature pick up 6 can carry out radio communication, namely wherein has radio communication device, such as, can adopt nRF905 multichannel monolithic transceiving chip, adopts wireless radio transmission technology, realizes the real-time transmission of signal.
In order to make application life and the safety in utilization of auger stem system, the material of the first auger stem and auxiliary screw drilling rod is low chromium nickel oxidation resistant steel.
In order to the accuracy measured when ensureing that drilling safe and the utility model use, described auger stem system external diameter choice criteria size φ 42mm, the external diameter of described hole packer from top to bottom increases gradually, hole packer maximum outside diameter is 45mm, hole packer diameter slightly larger than auger stem system external diameter, to ensure to seal completely.
Concrete implementation step when using is as follows: A. installs gravity sensor drilling outside position, suspension strap hole cutting catcher bag on gravity sensor, by auger stem system through cutting catcher bag with holes, and place air pump 10 and data acquisition unit 11, the boring of construction diameter φ 42mm in the coal body of driving face front;
B. creep into will reach predetermined gas inrush initial velocity fathom such as 10m time, diameter 45mm hole packer is connected auger stem system to creep in coal body, treat that auger stem system can not continue to creep into or creep at need, can be fastened in boring by the ickings cut out and realize sealing of hole effect;
C. air pump is connected with air pipe, to cylinder body insufflation gas, air pressure in cylinder body to the front portion of piston pushed in piston cavity volume with chamber wall close contact, drilling rod front like this sealing of hole effect of hole packer and choke cover close wind effect under, form the gas surveying room with external environment;
D. data acquisition unit is connected with measuring tube, gas inrush initial velocity Q value can be measured; In whole drilling process, measure boring temperature in borehole T value in real time by temperature pick up, and radio to data acquisition unit; In addition, drilling cuttings is dredged to outside boring through helical blade, all fall into cutting catcher bag with holes, the coal powder quantity of bore S value recorded is sent to data acquisition unit by gravity sensor, stops boring and move after often creeping into 1m, when gravimetric data is stablized, measure a coal powder quantity of bore S value, it should be noted that after often measuring a coal powder quantity of bore, hole below cutting catcher bag with holes need be opened, release the whole drilling cuttings of previous measurement; And all data are recorded in table 1;
E. measure after terminating, hole packer and all auger stems are exited boring by reversion rig.
Table 1 data logger

Claims (10)

1. the device of simultaneous determination QST value, it is characterized in that, comprise auger stem system (1), cutting catcher bag with holes (8), gravity sensor (9), air pump (10) and data acquisition unit (11), data acquisition unit (11) comprises gas flow and takes into account radio communication device
Described auger stem system comprises the first auger stem and some joint auxiliary screw drilling rods, auxiliary screw drilling rod is connected to the afterbody of the first auger stem, the cylinder body (2) of hollow is provided with in the middle part of first auger stem inner chamber, its front end is provided with opening and back-end closure, cylinder body (2) is fixed by connection strap unit, the inwall avris at cylinder body (2) middle part is provided with dop (13), the final position that described dop (13) is retracted for limited piston, the front portion of piston is cone, the rear portion of piston is cylinder, the internal diameter of cylindrical external diameter and cylinder body (2) matches, piston (3) the front end piston cavity volume that to be choke cover (4) surround into the first auger stem matches with piston, there is measurement cavity piston cavity volume front end, the gas gushed out when measuring cavity for holding the boring of auger stem system, adjoin the first auger stem outer wall in choke cover (4) and measure cavity place and be provided with the temperature pick up (6) that can carry out radio communication, first auger stem inwall is provided with the air pipe (15) be connected with cylinder body (2), first auger stem (1) inner chamber is also provided with measuring tube (5), measuring tube (5) runs through the inside of cylinder body (2) and piston (3), the air pipe and measuring tube that are connected with air pipe and the measuring tube of the first auger stem is respectively provided with in the inner chamber of auxiliary screw drilling rod, the outside spacers of measuring tube is provided with fixed strip unit, in the middle part of the inner chamber by fixed strip unit measuring tube being fixed on auxiliary screw drilling rod, the afterbody of final section auxiliary screw drilling rod is provided with hole packer (7),
Described cutting catcher bag with holes is arranged on gravity sensor (9), for whole drilling cuttings of discharging in gathering screw drill pipe system drilling process, described air pump (10) is connected with air pipe (15), and data acquisition unit (11) is connected with measuring tube afterbody and gravity sensor.
2. the device of simultaneous determination QST value as claimed in claim 1, is characterized in that, described connection strap unit comprises three and to distribute around outer wall of cylinder block and to be mutually the connection strap of 120 ° of angles.
3. the device of simultaneous determination QST value as claimed in claim 1, is characterized in that, described fixed strip unit comprises three and to distribute around measuring tube outer wall and to be mutually the fixed strip of 120 ° of angles.
4. the device of simultaneous determination QST value as claimed in claim 3, it is characterized in that, described air pipe is three, is arranged at the middle part that three are attached at the fixed strip of auger stem inwall respectively.
5. the device of simultaneous determination QST value as claimed in claim 1 or 2 or 3 or 4, is characterized in that, be arrange 3 fixed strip unit in the auxiliary screw drilling rod of 1m, lay respectively at apart from this section of auxiliary screw drilling rod port 0.2m, 0.5m and 0.8m place in every segment length.
6. the device of simultaneous determination QST value as claimed in claim 5, it is characterized in that, the length of described fixed strip and measuring tube contact site is 20mm.
7. the device of simultaneous determination QST value as claimed in claim 1, it is characterized in that, described radio communication device is nRF905 multichannel monolithic transceiving chip.
8. the device of simultaneous determination QST value as claimed in claim 1, it is characterized in that, the material of the first auger stem and auxiliary screw drilling rod is low chromium nickel oxidation resistant steel.
9. the device of simultaneous determination QST value as claimed in claim 8, it is characterized in that, the external diameter of auger stem system is 42mm, and the external diameter of described hole packer from top to bottom increases gradually, and hole packer maximum outside diameter is 45mm.
10. the device of simultaneous determination QST value as claimed in claim 1, it is characterized in that, the length of the first auger stem is 2m, and the length of described measurement cavity is 0.5m.
CN201420694070.7U 2014-11-18 2014-11-18 The device of simultaneous determination QST value Withdrawn - After Issue CN204267019U (en)

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CN201420694070.7U CN204267019U (en) 2014-11-18 2014-11-18 The device of simultaneous determination QST value

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104612657A (en) * 2014-11-18 2015-05-13 四川大学 Device for determining Q, S and T values in combined mode
CN105003200A (en) * 2015-07-03 2015-10-28 左红 Hole drilling equipment and hole drilling method of hole drilling equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104612657A (en) * 2014-11-18 2015-05-13 四川大学 Device for determining Q, S and T values in combined mode
CN104612657B (en) * 2014-11-18 2017-05-03 四川大学 Device for determining Q, S and T values in combined mode
CN105003200A (en) * 2015-07-03 2015-10-28 左红 Hole drilling equipment and hole drilling method of hole drilling equipment
CN105003200B (en) * 2015-07-03 2017-06-23 左红 Rig and its boring method

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Granted publication date: 20150415

Effective date of abandoning: 20170503