CN101769152A - Safe and rapid tunneling process for high-outburst mine coal roadway - Google Patents
Safe and rapid tunneling process for high-outburst mine coal roadway Download PDFInfo
- Publication number
- CN101769152A CN101769152A CN201010105537A CN201010105537A CN101769152A CN 101769152 A CN101769152 A CN 101769152A CN 201010105537 A CN201010105537 A CN 201010105537A CN 201010105537 A CN201010105537 A CN 201010105537A CN 101769152 A CN101769152 A CN 101769152A
- Authority
- CN
- China
- Prior art keywords
- coal
- safe
- explosion
- tunneling process
- borehole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention relates to a mine coal roadway tunneling technology, in particular to a safe and rapid tunneling process for a high-outburst mine coal roadway, aiming at solving the problem how to avoid gas outburst in the tunneling process of a highly-gassy mine. The safe and rapid tunneling process comprises the following steps of: carrying out coal body forecasting by using a platform drilling machine, charging blastholes of the platform drilling machine and detonating, waiting for 30min after the detonating, entering a working face unit for outputting coal, supporting the platform drilling machine, entering the next circular working procedure, wherein the detonated blastholes adopt a diamond-cutting cylinder cut method, two large-diameter hollow holes are arranged at the middle part of a diamond cuthole, the circular detonation is controlled within 4m-6m, explosives are detonated at a millisecond time interval by utilizing a millisecond detonator, the blastholes are controlled to detonate successively according to a preset sequence, and the personnel withdraws to reach a safety distance before detonation and hides an anti-explosion movable refuge chamber vehicle.
Description
Technical field
The present invention relates to a kind of mine coal roadway driving technology, be specially a kind of safe and rapid tunneling process for high-outburst mine coal roadway.
Background technology
Coal and gas are outstanding to be a kind of extremely complicated dynamic phenomenon in the colliery, it can be in a short period of time, to unexpected a large amount of gas and the broken coals of ejection in tunnel, the fine coal of moment ejection can hundred meters long tunnels of filling, can bring serious injury accident to the personnel of Hot work in progress by coal body.Through national statistics China is coal and gas the most serious outstanding country, the outstanding number of times of coal road tunneling gas is maximum, main cause is the effect of ground pressure and gas pressure, and present domestic driving face outburst prevention measures commonly used mainly contains advance borehole, deep hole loosening blasting, hydraulic flushing in hole and in conjunction with the coal body index prediction.Coal body drilling cuttings index prediction: make a call to 2 above diameter 42mm at the work plane soft seam of meeting head on, the boring of long 6-10m, boring is whenever crept into 1m and is measured coal powder quantity of bore once, whenever creeps into 2m and surveys a drilling cuttings desorb index (coal body being detected automatically by the development ATY of coal academy of sciences Chongqing branch type outburst prediction instrument).Along the maximum coal powder quantity of bore Smax and the drilling cuttings desorb index k 1 of every meter of hole depth, prediction work face outburst hazard is when Smax＜6kg/m and desorb index k 1＜0.5 can be tunneled according to each boring.Owing to be subjected to objective condition to influence bigger as pouring Tou Shui, wind, workman's operative skill, present domestic characterization processes can not guarantee coal road unit safety driving fully, Si He ore deposit " 5.20 " gas burst accident is exactly most typical case, the protrusion-dispelling technical measures had been taked at that time, coal body detects every index and does not all exceed standard, but unit brings out coal when tunneling and gas is outstanding, and none survived for the work plane operating personnel.We adopt coal body to detect and in conjunction with this technology now, and personnel's into explosion-proof refuge chamber of hiding is blown out at a distance when blowing out, even it is outstanding to bring out gas, also can ensure all personnel's safety.
Summary of the invention
The present invention provides a kind of safe and rapid tunneling process for high-outburst mine coal roadway in order to solve the gas distinct issues of how avoiding in the highly gassy mine tunneling process.
The present invention is realized by following technical scheme, a kind of safe and rapid tunneling process for high-outburst mine coal roadway, step is, the prediction of bench drill machine-made egg-shaped or honey-comb coal briquets body, bench drill machine construction borehole, blast firing of powder charge is waited for 30mim after the explosion, entering the work plane unit produces coal, the supporting of bench drill machine, following one circulating process, the borehole of blowing out adopts the burn cut method of rhombus diging groove, at 2 large-diameter hollow eyes of rhombus slotted eyes middle part construction, the explosion loop control is between 4m-6m, and the utilization millisecond detonator makes the time interval of explosive with Millisecond, and the control borehole successively divides into groups to detonate by predefined procedure, personnel withdraw from safe distance before detonating, and hide into explosion-proof mobile refuge chamber car.
The key technology that realizes the coal road deep hole blasting is how to realize the deep hole slotting, just must adopt the burn cut method as the deep hole slotting, the wherein the most suitable coal body explosion of rhombus diging groove, can increase the empty eye in 2 centers for improving demolition effect, increase the empty eye in center, the explosion scope of freedom and be controlled at 100mm≤φ≤110m.(boring of protrusion-dispelling detailed rules and regulations regulation is less than 110mm, and the angled cut driving is then realized the above operation of 3m for burn cut below the 3m).
2, snubber adopts the special three grades of emulsions of φ 50mm * 500mm, strengthens the explosive diameter and reduces explosive and borehole gap, improves demolition effect;
3, add the adjustable pneumatic bench drill of installation at mining hydraulic jumbolter, realize protrusion-dispelling prediction, perforating, support integrated.The saving coal supporting material of meeting head on, and enhance productivity.(three advance the two groove 2500m work planes of rolling back and rationalizing as constructing, can save and meet head on to predict 2500 * 400 yuan=1000000 yuan of support materials, labour cost 2500 * 2 * 100=500000 unit).
4, portable refuge chamber car is installed and carries out and blow out at a distance in is traversed in crossheading air intake lane, the operating personnel all hides and efficiently solves the technical barrier of the outstanding most critical of hurting sb.'s feelings of gas in the car into when blowing out.
Realize coal body deep hole smooth blasting theoretical foundation and process: this process using is blown out and is become flexible presplitting principle, smooth blasting theory, the millisecond blasting theory, it makes coal seam presplitting loosening, discharge internal pressure, make the avalanche of coal main body, the coal body profiled outline is not damaged, thereby realizes that gas pressure discharges and the coal road driving, and deep hole presplit blasting is to discharge the coal body internal stress by explosion, prevent that gas is outstanding, and the not avalanche of section coal main body, during driving by the moulding of unit cut.
1, loosening presplitting principle
It is stable that loosening presplit blasting is adapted to ocurrence of coal seam, less projecting coal bed of intensity of outburst, form broken circle and relaxation zone after the explosion, coal in the circle is respectively clastic and broken shape, the stress that helps to eliminate the soft or hard inequality and cause is concentrated, form the drawing-off gas passage, reduce gas pressure and stress, this helps extinction.
2, millisecond blasting theory
The utilization millisecond detonator makes the time interval of explosive with Millisecond, and the control borehole successively divides into groups to detonate by predefined procedure, because the blanking time of delaying is short, the energy that causes each cartridge bag blast to produce influences each other.In highly gassy mine, 160ms after the explosion, gas density is 0.3%-0.5%, be 0.3%-0.98% during 260ms, 360ms generally is no more than 1% with interior, and the interval of explosion between adjacent has only 25ms, as long as the final stage defer time is in 130ms, moment, concentration was then below 0.5%.
3, loosening presplitting principle and millisecond blasting theory provide theoretical foundation and safety guarantee for realizing remote full-face blast.And the key technology of explosion is how to realize slotting and can reach the smooth blasting effect.Because advance of working cycle greater than 4m, can't be realized angled cut, has only burn cut could guarantee the systemic circulation smooth blasting.
Description of drawings
Fig. 1 is straight eye water chestnut row slotting distribution map (5.5 meters X3.5 rice)
Fig. 2 ties up the explosive structural representation for bamboo chip
Fig. 3 is a mobile refuge cave bassinet structure schematic diagram
The specific embodiment
A kind of safe and rapid tunneling process for high-outburst mine coal roadway, step is, the prediction of bench drill machine-made egg-shaped or honey-comb coal briquets body, bench drill machine construction borehole, blast firing of powder charge, wait for 30mim after the explosion, enter the work plane unit and produce coal, the supporting of bench drill machine, following one circulating process, the borehole of blowing out adopts the burn cut method of rhombus diging groove, and at 2 large-diameter hollow eyes of rhombus slotted eyes middle part construction, the explosion loop control is between 4m-6m, the utilization millisecond detonator makes the time interval of explosive with Millisecond, the control borehole successively divides into groups to detonate by predefined procedure, and personnel withdraw from safe distance before detonating, and hide into explosion-proof mobile refuge chamber car.The bench drill machine is a kind of common equipment in colliery, has effects such as boring, supporting.
The rhombus burn cut as shown in Figure 1, apart from base plate 1200mm.Periphery hole is 500mm apart from coal group top board, and coal eye spacing is 500mm.Snubber φ=55, two a large-diameter hollow eye (O
1, O
2), hollow eye 100mm≤φ≤110m.Point 1-4 is that snubber adopts three grades of emulsions of φ 50mm * 500mm to add up to 1.18 * 8 * 4=37.76 kilogram.Point 5-24 is that periphery hole adopts three grades of emulsions of φ 35 * 500m to add up to 0.57 * 2 * 20=22.8 kilogram, adopts two detonating fuses, and this circulation explosion is calculated by 5m.
As schematically shown in Figure 2, snubber and periphery hole all adopt bamboo chip to prick and tie up loading method, reduce the powder charge time, enhance productivity; Adopt the two detonating fuses of colliery permission.
As schematically shown in Figure 3, mobile refuge cave car is reequiped by hoolivan, establishes compressed air self-help in the mobile refuge chamber car, presses wind to supply with by the tunnel, ensures that everyone is no less than 0.3m by wind supply quantity
3/ min, the refuge chamber car is installed recovery oxygen system in addition according to taking refuge the enough isolated self-rescuers of maximum staffings in the refuge chamber, when extraneous pressure ventilation pipe is damaged, then realize the oxygen supply by regenerating unit, guarantees personal security.The isolated self-rescuer case of 1-aerobic regenerating unit 2-3-seat 4-sealed door 5-presses wind joint 6-phone among the figure.
A deep hole blasting pick technology more complicated, must guarantee regular circulation (projecting mine prediction 6m one circulation for the ease of management and tissue, so the explosion circulation is less than 6m), and employing (3 * 7+3) operating types, guarantee per tour one circulation, be exactly that the class of production carries out 3 * 7 systems, maintenance crew's time is 3 hours.Hydraulic jumbolter adds installs regulatable pneumatic bench drill, realizes that protrusion-dispelling detects, construction coal body borehole, support integratedization of roadway bolt.The adjustable bench drill construction coal body that wherein newly adds meets head on to detect hole and borehole, and roof-bolter carries out top board and two and helps supporting.The full section supporting of coal body of will meeting head on before existing protrusion-dispelling detects prevents that the coal body wall caving from hurting sb.'s feelings, promptly waste material, manually have a strong impact on production efficiency again.And realizing the unification of three machines because roof-bolter has temporary lining, personnel stand in again and detect on the anchor pole, so can ensure operating personnel's safety fully.For example drilling depth is 1.8 myriametres certain in projecting mine year, and every 6m detects once, meet head on 400 yuan of section support material expenses of 5m * 3.5m.
Save ten thousand yuan of cost of materials=1.8 ten thousand/6 * 400=120
Save labour cost=1.8 ten thousand/6 * 2 people * 100 yuan/worker=600,000 yuan
Annual 1800000 yuan of the direct costs of saving.
Claims (1)
1. safe and rapid tunneling process for high-outburst mine coal roadway, it is characterized in that: step is, the prediction of bench drill machine-made egg-shaped or honey-comb coal briquets body, bench drill machine construction borehole, blast firing of powder charge, wait for 30mim after the explosion, enter the work plane unit and produce coal, the supporting of bench drill machine, following then one circulating process, the borehole of blowing out adopts the burn cut method of rhombus diging groove, and at 2 large-diameter hollow eyes of rhombus slotted eyes middle part construction, the explosion loop control is between 4m-6m, the utilization millisecond detonator makes the time interval of explosive with Millisecond, the control borehole successively divides into groups to detonate by predefined procedure, and personnel withdraw from safe distance before detonating, and hide into explosion-proof mobile refuge chamber car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010105537A CN101769152A (en) | 2010-01-31 | 2010-01-31 | Safe and rapid tunneling process for high-outburst mine coal roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010105537A CN101769152A (en) | 2010-01-31 | 2010-01-31 | Safe and rapid tunneling process for high-outburst mine coal roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101769152A true CN101769152A (en) | 2010-07-07 |
Family
ID=42502235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010105537A Pending CN101769152A (en) | 2010-01-31 | 2010-01-31 | Safe and rapid tunneling process for high-outburst mine coal roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101769152A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914226A (en) * | 2012-11-08 | 2013-02-06 | 中国矿业大学(北京) | Hollow-hole rhombic parallel cut blasting damping method |
| CN103696770A (en) * | 2013-12-17 | 2014-04-02 | 武汉工程大学 | Cutting raise cutting method used in underground mining |
| CN103940309A (en) * | 2014-03-26 | 2014-07-23 | 南京梅山冶金发展有限公司 | Underground-blasting shaft forming method |
| CN104596372A (en) * | 2014-12-31 | 2015-05-06 | 中国铁道科学研究院铁道建筑研究所 | Tunneling method for improving explosion driving rate and lowering explosion vibration |
-
2010
- 2010-01-31 CN CN201010105537A patent/CN101769152A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914226A (en) * | 2012-11-08 | 2013-02-06 | 中国矿业大学(北京) | Hollow-hole rhombic parallel cut blasting damping method |
| CN103696770A (en) * | 2013-12-17 | 2014-04-02 | 武汉工程大学 | Cutting raise cutting method used in underground mining |
| CN103696770B (en) * | 2013-12-17 | 2016-01-06 | 武汉工程大学 | Underground mining upward incise kerve method |
| CN103940309A (en) * | 2014-03-26 | 2014-07-23 | 南京梅山冶金发展有限公司 | Underground-blasting shaft forming method |
| CN103940309B (en) * | 2014-03-26 | 2015-09-23 | 南京梅山冶金发展有限公司 | A kind of method of underground blasting Cheng Jing |
| CN104596372A (en) * | 2014-12-31 | 2015-05-06 | 中国铁道科学研究院铁道建筑研究所 | Tunneling method for improving explosion driving rate and lowering explosion vibration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103924956B (en) | A kind of lump coal exploitation Advance presplitting method | |
| CN108661643B (en) | It a kind of coal working face end adopts return channel and cuts top release shield lane method | |
| CN104790949B (en) | Huge thick tight roof high methane high seam Roof Control and method and the drilling machine improving gas drainage under suction efficiency | |
| CN101328809B (en) | Non-bottom pillar deep hole falling-back type mining method | |
| CN102287198B (en) | Construction method for river-crossing shield tunnel crushed stratum communication channel | |
| CN107764144A (en) | A kind of tunnel Millisecond Controlled Blasting method | |
| CN103939101B (en) | A kind of lump coal exploitation method | |
| CN103244180B (en) | Gob-side entry driving surrounding rock control method using remaining small pillars | |
| CN102401616A (en) | Blasting excavation method of vertical shaft | |
| CN102109304A (en) | Directional rock blasting crack propagation method and device | |
| CN103953339B (en) | A kind of lump coal exploitation coal-winning machine and seam mining method | |
| CN102494571A (en) | Construction method for damped blasting of tunnels | |
| CN110645855B (en) | Dust suppression blasting method for medium-length hole of strip mine | |
| WO2023005344A1 (en) | Underground tunneling blasting advanced protection wall dust suppression method | |
| CN111335892A (en) | Strong-impact coal seam pressure relief prevention and control method | |
| CN106246184A (en) | A kind of recovery method of half-edge coal seam | |
| CN112943262A (en) | Karst landform tunnel energy-gathering water pressure smooth blasting structure and method | |
| CN101769152A (en) | Safe and rapid tunneling process for high-outburst mine coal roadway | |
| CN110440649A (en) | Hydraulic drill ring drilling large cross-section tunnel steel for shot structure and blasting method | |
| CN206801542U (en) | A kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing | |
| CN111457804A (en) | Method for blasting IV-grade massive crushed rock with disordered development and wide fracture surface | |
| CN104879128B (en) | Severe inclined thick coal seam coal winning technology based on the advanced pre- quick-fried reduction of top coal | |
| CN109025999B (en) | One-field three-purpose top coal weakening method | |
| CN102980453A (en) | Water injection drilling and blasting method for unloading stress of structural strong rock burst area of horizontal structural surface | |
| CN213179684U (en) | Sand slate tunnel blasting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100707 |