CN102536243A - Coal seam freezing type cross-drift coal uncovering method - Google Patents
Coal seam freezing type cross-drift coal uncovering method Download PDFInfo
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Abstract
The invention discloses a coal seam freezing type cross-drift coal uncovering method which comprises the following steps: a) arranging a drilling site in the position of a cross-drift operating surface of a tunnel being 5-7 meters away from a coal seam; b) drilling a plurality of cooling holes and temperature-sensing holes, which are matched with cooling pipes and temperature-sensing pipes of a stratum freezing system, in preset depth on the coal seam in the drilling site; c) arranging the stratum freezing system in the tunnel; d) respectively inserting the cooling pipes and temperature-sensing pipes of the stratum freezing system into the cooling holes and temperature-sensing holes; e) utilizing the stratum freezing system to cool the coal rock around the cross-drift to minus 30 DEG C to minus 20 DEG C and lasting for a period of time; f) opening the cross-drift and the coal rock in a blasting manner; and g) building arch for the tunnel. The method provided by the invention also comprises the steps of determining anti-bulge parameters, determining water content of the coal seam and moisturizing the coal seam. The method provided by the invention has the beneficial effects that the coal seam need not be slotted, the quantity of drilled holes is less, the construction period is short and the efficiency is high.
Description
Technical field
The present invention relates under the coal mine tunnelling technology, particularly a kind of method of carrying out stone door punching coal after under coal mine, utilizing the Freezing stratum as rapid system that the coal seam is freezed in the tunnelling process.
Background technology
In the coal mining industry, with the entry that ground does not directly communicate, the hard heading of its long axis and coal seam orthogonal or oblique is called crossdrift.Stone door punching coal is meant crossdrift, and (top) slate post passes whole operation process that the coal seam gets into top (end) plate the end of from.Existing stone door punching coal technology; Particularly for being prone to projecting coal bed stone door punching coal; Normally, the hydraulic slotted liner technique pressure break is implemented in the coal seam, carried out will be positioned at the coal seam gas pumping and mining pressure relief of tunnel work plane near zone through the extraction hole after through bore the gas pumping hole to the coal seam; Occur the outstanding security incident in coal seam when preventing stone door punching coal, and this mode has formed industry standard.Yet there is long, deficiency such as construction drill quantity is many of drawing-off gas time in existing stone door punching coal, causes a spent time of stone door punching coal to need about 2～3 months approximately, the coal seam that has even need the longer time.For this reason, those skilled in the art has carried out some and has explored, and attempts to find the stone door punching coal method of a kind of short construction period, high efficiency.Chinese patent publication No. CN102168560A, date of publication on September 7th, 2011, invention and created name " displaced type stone door punching coal method ".This method is included in stone door punching coal work section and bores measure hole and mud hole, through the measure hole slot is carried out in the coal seam and forms the space, and concrete perfusion in the space is treated to carry out excavation operation again after the concrete setting.This method need not carried out the gas pumping release, and construction period is short than gas pumping release mode, has improved the stone door punching coal operating efficiency.But the slot workload is big, and for be prone to projecting coal bed for its slot easy-formation not, simultaneously, also need carry out tunneling to replacing the back concrete, the driving difficulty is big, and stone door punching coal efficient is formed certain restriction.Chinese patent publication number CN102174892A, open September 7 2011 date, invention and created name " rotary-cutting type stone door punching coal method ".This method is included in stone door punching coal work section and bores measure hole and mud hole; Through the measure hole slot is carried out in the coal seam and form the space; The inflation model is set in the space again, in model, inflates and, treat to carry out excavation operation again after the concrete setting to the remaining space concrete perfusion.This method is compared with displaced type stone door punching coal method, has reduced concrete headwork greatly, and its efficient can further improve, but still has the not defective of easy-formation of big and its slot of slot workload.For this reason, need further to improve.Yet; In the prior art; Under shallow-layer geological conditionss such as the tunnel piercing of railway, highway or subway, coal mine shaft construction, a kind of construction technology that is called as freezing process is arranged; It is through the Freezing stratum as rapid system broken grounds such as weak soil, turquoise, sandstone to be refrigerated to-30 ℃～-20 ℃, makes by the broken ground of frozen region and forms continuous, hard freezing wall, improves easy construction property.But during the upper entry stone door punching coal that is applied in the coal mining industry of this form of construction work is constructed.
Summary of the invention
Of the present invention is exactly deficiency to prior art, and a kind of method of carrying out stone door punching coal after utilizing the Freezing stratum as rapid system that the coal seam is freezed is provided.Use this method not need slot is carried out in the coal seam, drilling hole amount is few, short construction period, efficient high.
For realizing above-mentioned purpose, the present invention adopts following technical scheme.
Formula stone door punching coal method is freezed in a kind of coal seam, may further comprise the steps:
5～7 meters are provided with the boring drill site to the crossdrift work plane of a in the tunnel apart from the coal seam;
B is drilled with several and the cooling tube of Freezing stratum as rapid system and cooling holes and the thermometer hole that temperature tube adapts of depthkeeping degree to the coal seam in drill site;
C lays the Freezing stratum as rapid system in the tunnel;
D inserts several cooling tubes and the temperature tube of Freezing stratum as rapid system respectively in several cooling holes and the thermometer hole;
E utilizes the Freezing stratum as rapid system that the coal and rock of crossdrift periphery is refrigerated to-30 ℃～-20 ℃ and certain time;
F opens crossdrift and coal petrography;
G roadway support.
Adopt aforementioned schemes the present invention; Through the coal and rock of Freezing stratum as rapid system to the crossdrift periphery; Utilize the moisture in the coal and rock that it is frozen into continuous freezing wall; Gas in the coal seam its by block outside freezing wall, it is outstanding that coal-bed gas can not take place in taking off the crossdrift process, can guarantee that the mode of blowing out takes off crossdrift and coal petrography work safety; Simultaneously, owing to adopt freezing method, the zone of its boring can be much smaller than the boring zone of gas pumping release mode, and not only drilling hole amount has still less reduced the boring workload, and does not need hydraulic slotted liner technique; In addition, its freeze-off time only needs about 1～1.5 month usually, is less than 2～3 months of gas pumping release, has shortened the duration, has improved the stone door punching coal operating efficiency.
Optimized technical scheme also comprises the protrusion-dispelling parametric measurement before carrying out said step f; The protrusion-dispelling parametric measurement is qualified, then carries out said step f; The protrusion-dispelling parametric measurement is defective, then utilizes cooling holes, thermometer hole and gas pumping device mash gas extraction certain hour, repeats the protrusion-dispelling parametric measurement, carries out subsequent step by measuring the result.To guarantee stone door punching coal safety.
Optimized technical scheme also comprises the coal seam moisture determination when carrying out said step b, during at least one hole in getting out cooling holes and thermometer hole, the coal petrography in the boring mud is carried out moisture determination; When the coal petrography water content reaches setting value, continue to bore cooling holes and thermometer hole; When the coal petrography water content is lower than setting value, utilize the cooling holes or the thermometer hole that have got out to pass through the pressure water charging system to the coal seam moisturizing; Again the coal petrography in the boring mud after the moisturizing is carried out moisture determination, when the coal petrography water content reaches setting value, stop moisturizing, continue to bore cooling holes and thermometer hole; When the coal petrography water content is lower than setting value, utilize the cooling holes or the thermometer hole that have got out to continue the coal petrography moisture determination is carried out in the coal seam moisturizing once more through the pressure water charging system, reach setting value until the coal petrography water content.So that contain enough moisture in the coal petrography, the coal petrography physical efficiency of crossdrift periphery is frozen into freezing wall reliably, further strengthens gas block effect is guaranteed stone door punching coal safety.
Optimized technical scheme, said roadway support adopt builds the supporting of arch mode, the safety with the tunnel of further increasing work efficiency.
When application this method is carried out stone door punching coal, in boring and refrigerating process, should take explosion precaution by industry standard; In refrigerating process, also need take antifreezing measures to personnel and relevant device.
The present invention's beneficial effect compared with prior art is, do not need slot is carried out in the coal seam, and drilling hole amount is few, short construction period, efficient are high.
Description of drawings
Fig. 1 is the boring distribution schematic diagram of the vertical sectional elevation of crossdrift work plane among the present invention.
Fig. 2 is the entrance point cross sectional representation of crossdrift work plane boring among the present invention.
Fig. 3 is the cross sectional representation of the bottom of crossdrift work plane boring among the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described, but does not therefore limit the present invention among the described scope of embodiments.
Embodiment 1Referring to Fig. 1, formula stone door punching coal method is freezed in a kind of coal seam, may further comprise the steps:
5～7 meters are provided with boring drill site 1 to the crossdrift work plane of a in the tunnel apart from the coal seam;
B is drilled with cooling tube and the cooling holes 2 and thermometer hole 3 that temperature tube adapts of several and Freezing stratum as rapid system 4 of depthkeeping degree to the coal seam in drill site 1;
C lays Freezing stratum as rapid system 4 in the tunnel;
D inserts several cooling tubes and the temperature tube of Freezing stratum as rapid system 4 respectively in several cooling holes 2 and the thermometer hole 3;
E utilizes Freezing stratum as rapid system 4 that the coal and rock of crossdrift periphery is refrigerated to-30 ℃～-20 ℃ and certain time;
The f mode of blowing out is opened crossdrift and coal petrography;
Arch is built in the g tunnel.
Before carrying out said step f, also comprise the protrusion-dispelling parametric measurement; The protrusion-dispelling parametric measurement is qualified, then carries out said step f; The protrusion-dispelling parametric measurement is defective, then utilizes cooling holes 2, thermometer hole 3 and gas pumping device mash gas extraction certain hour, repeats the protrusion-dispelling parametric measurement, carries out subsequent step by measuring the result.To guarantee stone door punching coal safety.
When carrying out said step b, also comprise the coal seam moisture determination, during at least one hole in getting out cooling holes 2 and thermometer hole 3, the coal petrography in the boring mud is carried out moisture determination; When the coal petrography water content reaches setting value, continue to bore cooling holes 2 and thermometer hole 3; When the coal petrography water content is lower than setting value, utilize the cooling holes 2 or the thermometer hole 3 that have got out to pass through the pressure water charging system to the coal seam moisturizing; Again the coal petrography in the boring mud after the moisturizing is carried out moisture determination, when the coal petrography water content reaches setting value, stop moisturizing, continue to bore cooling holes 2 and thermometer hole 3; When the coal petrography water content is lower than setting value, utilize the cooling holes 2 or the thermometer hole 3 that have got out to continue the coal petrography moisture determination is carried out in the coal seam moisturizing once more through the pressure water charging system, reach setting value until the coal petrography water content.So that contain enough moisture in the coal petrography, the coal petrography physical efficiency of crossdrift periphery is frozen into freezing wall reliably, further strengthens gas block effect is guaranteed stone door punching coal safety.
Though more than combined accompanying drawing to describe embodiment of the present invention; But those of ordinary skill in the art also can recognize in the scope to accompanying claims and make various variations or modification, and these modifications and variation are interpreted as within scope of the present invention and intention.
Claims (4)
1. formula stone door punching coal method is freezed in a coal seam, it is characterized in that, may further comprise the steps:
5～7 meters are provided with boring drill site (1) to the crossdrift work plane of a in the tunnel apart from the coal seam;
B is drilled with several and the cooling tube of Freezing stratum as rapid system (4) and cooling holes (2) and the thermometer hole (3) that temperature tube adapts of depthkeeping degree to the coal seam in drill site (1);
C lays Freezing stratum as rapid system (4) in the tunnel;
D inserts several cooling tubes and the temperature tube of Freezing stratum as rapid system (4) respectively in several cooling holes (2) and the thermometer hole (3);
E utilizes Freezing stratum as rapid system (4) that the coal and rock of crossdrift periphery is refrigerated to-30 ℃～-20 ℃ and certain time;
The f mode of blowing out is opened crossdrift and coal petrography;
G roadway support.
2. formula stone door punching coal method is freezed in coal seam according to claim 1, it is characterized in that: before carrying out said step f, also comprise the protrusion-dispelling parametric measurement; The protrusion-dispelling parametric measurement is qualified, then carries out said step f; The protrusion-dispelling parametric measurement is defective, then utilizes cooling holes (2), thermometer hole (3) and gas pumping device mash gas extraction certain hour, repeats the protrusion-dispelling parametric measurement, carries out subsequent step by measuring the result.
3. formula stone door punching coal method is freezed in coal seam according to claim 1; It is characterized in that: when carrying out said step b, also comprise the coal seam moisture determination; During at least one hole in getting out cooling holes (2) and thermometer hole (3), the coal petrography in the boring mud is carried out moisture determination; When the coal petrography water content reaches setting value, continue to bore cooling holes (2) and thermometer hole (3); When the coal petrography water content is lower than setting value, utilize the cooling holes (2) or the thermometer hole (3) that have got out to pass through the pressure water charging system to the coal seam moisturizing; Again the coal petrography in the boring mud after the moisturizing is carried out moisture determination, when the coal petrography water content reaches setting value, stop moisturizing, continue to bore cooling holes (2) and thermometer hole (3); When the coal petrography water content is lower than setting value, utilize the cooling holes (2) or the thermometer hole (3) that have got out to continue the coal petrography moisture determination is carried out in the coal seam moisturizing once more through the pressure water charging system, reach setting value until the coal petrography water content.
4. freeze formula stone door punching coal method according to any described coal seam of claim in the claim 1～3, it is characterized in that: the roadway support in the said step g is adopted and is built the supporting of arch mode.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306677A (en) * | 2013-05-26 | 2013-09-18 | 贵州省矿山安全科学研究院 | Rapid rock cross-cut coal uncovering process and outburst prevention method |
| CN104213921A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Freezing-type stone door cross-measure coal uncovering method based on hydraulic seam cutting |
| CN104847349A (en) * | 2015-05-06 | 2015-08-19 | 西安科技大学 | Coal and rock mass freeze thawing water injection fracturing weakening system and method thereof |
| CN105221150A (en) * | 2015-09-22 | 2016-01-06 | 中国矿业大学 | A kind of method of horizontal jet grouting stake reinforced stone door punching coal |
| CN106124243A (en) * | 2016-06-16 | 2016-11-16 | 重庆大学 | Coal seam gas-bearing capacity measures advanced freezing sampling method |
| CN106194161A (en) * | 2016-08-17 | 2016-12-07 | 西南科技大学 | A kind of based on freezing to block the method that rock mass high pressure crevice water measures coal-bed gas pressure |
| CN107130998A (en) * | 2017-07-12 | 2017-09-05 | 贵州大学 | A kind of heating cable heats coal seam temperature monitoring system |
| CN107605484A (en) * | 2017-08-28 | 2018-01-19 | 中国矿业大学 | A kind of liquid nitrogen freezing formula coal uncovering method |
| CN109252861A (en) * | 2018-09-11 | 2019-01-22 | 中国矿业大学 | A kind of electric pulse auxiliary liquid nitrogen freezing formula coal uncovering method |
| CN110067591A (en) * | 2018-01-24 | 2019-07-30 | 中铁二院工程集团有限责任公司 | Tunnel and flat lead pass through coal seam construction gas drainage method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306677A (en) * | 2013-05-26 | 2013-09-18 | 贵州省矿山安全科学研究院 | Rapid rock cross-cut coal uncovering process and outburst prevention method |
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| CN104213921A (en) * | 2014-08-07 | 2014-12-17 | 中国矿业大学 | Freezing-type stone door cross-measure coal uncovering method based on hydraulic seam cutting |
| WO2016019826A1 (en) * | 2014-08-07 | 2016-02-11 | 翟成 | Freezing cross-cut coal cutting method based on hydraulic seam-cutting |
| CN104847349A (en) * | 2015-05-06 | 2015-08-19 | 西安科技大学 | Coal and rock mass freeze thawing water injection fracturing weakening system and method thereof |
| CN105221150A (en) * | 2015-09-22 | 2016-01-06 | 中国矿业大学 | A kind of method of horizontal jet grouting stake reinforced stone door punching coal |
| CN106124243A (en) * | 2016-06-16 | 2016-11-16 | 重庆大学 | Coal seam gas-bearing capacity measures advanced freezing sampling method |
| CN106194161A (en) * | 2016-08-17 | 2016-12-07 | 西南科技大学 | A kind of based on freezing to block the method that rock mass high pressure crevice water measures coal-bed gas pressure |
| CN107130998A (en) * | 2017-07-12 | 2017-09-05 | 贵州大学 | A kind of heating cable heats coal seam temperature monitoring system |
| CN107605484A (en) * | 2017-08-28 | 2018-01-19 | 中国矿业大学 | A kind of liquid nitrogen freezing formula coal uncovering method |
| CN110067591A (en) * | 2018-01-24 | 2019-07-30 | 中铁二院工程集团有限责任公司 | Tunnel and flat lead pass through coal seam construction gas drainage method |
| CN109252861A (en) * | 2018-09-11 | 2019-01-22 | 中国矿业大学 | A kind of electric pulse auxiliary liquid nitrogen freezing formula coal uncovering method |
| CN109252861B (en) * | 2018-09-11 | 2020-06-26 | 中国矿业大学 | Electric pulse assisted liquid nitrogen freezing type rock cross-cut coal uncovering method |
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Application publication date: 20120704 |