CN105649635A - Method for tunneling coal bed repeated mining roadway in goaf - Google Patents
Method for tunneling coal bed repeated mining roadway in goaf Download PDFInfo
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- CN105649635A CN105649635A CN201610146803.7A CN201610146803A CN105649635A CN 105649635 A CN105649635 A CN 105649635A CN 201610146803 A CN201610146803 A CN 201610146803A CN 105649635 A CN105649635 A CN 105649635A
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- 239000003245 coal Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000005641 tunneling Effects 0.000 title claims abstract description 18
- 238000005065 mining Methods 0.000 title abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 238000010276 construction Methods 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims description 37
- 241000209094 Oryza Species 0.000 claims description 29
- 235000007164 Oryza sativa Nutrition 0.000 claims description 29
- 235000009566 rice Nutrition 0.000 claims description 29
- 238000004880 explosion Methods 0.000 claims description 23
- 210000003141 lower extremity Anatomy 0.000 claims description 20
- 230000008093 supporting effect Effects 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000002360 explosive Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 9
- 210000003128 head Anatomy 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005422 blasting Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- 235000010676 Ocimum basilicum Nutrition 0.000 description 1
- 240000007926 Ocimum gratissimum Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/06—Cantilever extension or similar protecting devices for use in drifting galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a method for tunneling a coal bed repeated mining roadway in a goaf. The method is characterized in that on the basis of performing roadway roof support by adopting steel sheds, the steel sheds, a pre-drilling beam and a pre-drilling steel chisel are organically combined for realization; in the tunneling process, a roadway roof is subjected to advance support; in the construction process, the pre-drilling steel chisel is matched with the hanging type pre-drilling beam to perform temporary roof support. According to the method disclosed by the invention, the technical difficulty of the effective roadway roof support when the repeated mining roadway in the goaf is tunneled and blasted is solved; the integrity of the tunneling working surface roof is ensured, the rapidity and the safety of coal bed repeated mining roadway tunneling in the goaf are realized, and the tunneling cost of the repeated mining roadway is reduced. A combined tool used in the invention is simple in structure, simple and convenient to disassemble and assemble, easy to process and manufacture and good in practicability. The method disclosed by the invention has the advantages of being low in running cost, good in safety and good in market promotion and application prospect.
Description
Technical field
The present invention relates to a kind of tunnelling and method for protecting support, particularly relate to a kind of disaster type tunnelling method in coal mine gob, belong to technical field of coal exploitation.
Background technology
For a long time, coal resources in China exploitation also exists that the response rate is low, waste serious situation always. Reason is in that, the pit mining initial stage, because coal-mining technique falls behind, mismanagement, a large amount of coal resources are lost in goaf.
Under the situation that this non-renewable resources of coal reduce day by day, reclaim remaining coal resources in goaf imperative. And goaf second mining is one of important channel improving coal recovery rate, the length of service for extending mine has far-reaching realistic meaning.
The problems such as goaf Remanent coal resources existing forms difference is often very big, and occurrence condition is poor, safety guarantee degree is low and production management is difficult, this is the technical barrier of the residual coal of second mining. Further, the coal in goaf compresses and cementation through overlying rock with spoil, forms the rock mass of regeneration. Rock mass is mainly a prose style free from parallelism and part cataclastic texture, and integral hardness is little. When development blasting tunnel, top board, two helping to be easily broken, supporting difficulty is big, if driving face top board is protected bad, easily occurs across falling. Have a strong impact on driving speed, affect second mining economic benefit.
For as much as possible reclaiming goaf Remanent coal resources, it is achieved safe second mining, it is necessary to improve in many-sides such as roadway layout, coal winning technology, safety production techniques or explore. In a word, in goaf, disaster type driving and supporting are complicated system engineerings.
Summary of the invention
It is an object of the invention to provide a kind of safety good, disaster type tunnelling construction method in simply a kind of coal mine gob of construction technology.
The present invention is for achieving the above object, it is necessary to primarily technical problem is that of solution, how when explosion, digging laneway, back and two is helped to carry out the technical problem of effective support.
The present invention solves that above-mentioned technical problem be employed technical scheme comprise that, a kind of disaster type tunnelling method in goaf, it is characterised in that: adopt steel canopy to carry out roadway support; In work progress, visit drill rod before using and coordinate suspension type forestope to carry out top board gib;
Described steel canopy is fabricated structure, and overall in " �� " font, quantity is some;Each setting steel-shelf all includes two canopy lower limbs and a capplce; Wherein, the upper surface of steel canopy capplce contacts with back, supports top board;
Described canopy lower limb and capplce are I-steel, on the lower surface of each capplce, are provided with two caliper brake Apparatus for hanging articles;
Described forestope is a �� section steel beam, former and later two above caliper brake Apparatus for hanging articles hang in the lower section of capplce, and forestope is near the spacing retaining 0.1-0.2 rice between that end, one end and driving face of driving face;
A number of steel canopy becomes equally spaced and is sequentially arranged in digging laneway, and along with the driving forward of driving face, constantly sets up new steel canopy in the anterior position of that setting steel-shelf near driving face, and circulation carries out and so forth;
With far and near for principle of ordering with the relative distance of driving face, that setting steel-shelf near driving face is first; Described first setting steel-shelf is as pushing ahead of driving face, the dynamic changing process constantly replaced by new steel canopy;
On the web of above-mentioned first capplce, equidistantly offer a number of penetrating circular hole, tunneling process has only to two capplces offering penetrating circular hole;
Concrete construction method, comprises the following steps:
The first step, in tunnel, 0.1-0.2 rice, driving face front erection steel canopy;
Second step, uses electric coal drill, keeps its drilling rod to sequentially pass through above-mentioned each penetrating circular hole in the horizontal direction, beat a number of drill rod eye on driving face;
Wherein, the deep 1.5-1.8 rice of drill rod eye eye, front spy drill rod length 1.8-2.0 rice, the quantity of drill rod eye is equal with above-mentioned penetrating circular hole quantity;
Then, respectively by a number of front spy drill rod through corresponding each penetrating circular hole, and hammer into corresponding drill rod ophthalmic, during for explosion, top board is played a supporting role in protection;
3rd step, in the region beyond above-mentioned drill rod now side's 0.3-0.5 rice, beats a number of borehole, tunneling boring powder charge serial ignition of perforating is adopted to become lane, borehole eye distance is 0.3-0.5 rice, the deep 1.2-1.4 rice of borehole eye, after filling explosive, ignites explosion;
Every explosion cyclic advance 1.0-1.1 rice, after explosion completes, confirmed site safety is without, after danger, visiting drill rod Strengthening Roof supporting, then carry out looking for top before extracting out, and removes the crag of suspension and stone of living in time;
After looking for top to complete, spread landing net;
4th step, hydraulic prop is used to coordinate long timber by landing net jack-up, hydraulic prop should in an opposite direction to roadway head direction, to ensure that landing net can seal top board, wrap driving face top rib, then two forestopes are elapsed forward until its end is from new 0.1��0.2 meter of position of driving face formed after explosion, again on the front of former first setting steel-shelf, forestope, shelve another root and offer the capplce of penetrating circular hole, to set about installing the steel canopy that a frame is new; Now the capplce offering penetrating circular hole in former first setting steel-shelf being replaced to common capplce, such two capplces offering penetrating circular hole are used alternatingly, it is ensured that have two capplces offering penetrating circular hole in tunneling process; Before this operation and in operation process, tap at any time, and as required, timely use long handle instrument and dispose crag that may be present or stone of living;
Until another root capplce above-mentioned shelve in place after, the contact surface at this capplce Yu forestope squeezes into timber wedge, so that the upper surface of this capplce holds out against back;
Then, start drag conveyor, by manually the coal being caving and spoil being shoveled respectively to drag conveyor, transport tunnel;
After the coal being caving and spoil are cleaned out, carry out the installation of two canopy lower limbs of above-mentioned new steel canopy, until steel frame sets complete, form the permanent support at this roadway position place;
5th step, repeats the above-mentioned first step to the 3rd step, until position, whole tunnel is respectively formed permanent support.
What technique scheme was directly brought has the technical effect that, steel canopy, forestope and front spy drill rod three is organically combined, to realize in tunneling process the advance support to back; In work progress, visit drill rod before using and coordinate suspension type forestope to carry out top board gib, technical barrier when solving second mining tunnel digging blasting in goaf preferably, to back effective support.
For being more fully understood that the place of the difficult point of this " difficult problem ", briefly release bright as follows:
Coal in goaf compresses and cementation through overlying rock with spoil, forms the rock mass of regeneration. Rock mass is mainly a prose style free from parallelism and part cataclastic texture, and integral hardness is little. When development blasting tunnel, top board, two helping to be easily broken, supporting difficulty is big, if driving face top board is protected bad, easily occurs across falling.
Further, technique scheme, constructing operation is simple, flexibly, equipment and instrument less investment, and driving speed is fast, and labor efficiency is high.
It is preferably, disaster type tunnelling construction method in above-mentioned goaf, it is characterised in that the adjacent spacing between two steel canopies is 1-1.6 rice.
What this optimal technical scheme was directly brought has the technical effect that, the adjacent spacing between two steel canopies (permanent support unit) is 1-1.6 rice, it can be ensured that top board is formed supporting effect firm, reliable.
It is preferred that, disaster type tunnelling construction method in above-mentioned goaf, it is characterized in that, when inclined shaft, in the hanging of forestope and moving process, also need to fastened by forestope with the use of anti-abseiling and be fixed on corresponding capplce, to prevent the forestope landing that gets loose from hurting sb.'s feelings.
What this optimal technical scheme was directly brought has the technical effect that, is fastened by forestope with the use of flexible anti-abseiling and is fixed on corresponding capplce, it is possible to playing better fixation;
Further, anti-abseiling uses also very easy, and fast changeable or dismounting use to another place.
It is preferred that, visiting drill rod material before above-mentioned is steel alloy.
What this optimal technical scheme was directly brought has the technical effect that, steel alloy has higher hardness, rigidity and good wearability. On the one hand, it is possible to when bearing gib, be likely to the bigger shearing force needing to bear; On the other hand, it is possible to increase and effectively reuse number of times, increase the service life.
It is preferred that, the quantity of above-mentioned penetrating circular hole is more than 5.
What this optimal technical scheme was directly brought has the technical effect that, generally, the width in tunnel is typically in 2.4-2.6 rice, the quantity of penetrating circular hole be more than 5 (that is, spacing��0.65 meter between front spy drill rod), experience according to those skilled in the art, effective support when this is enough to ensure that breaking roof or support, it is possible to effectively stop potential or be likely to the crag that is caving or stone of living.
It is preferred that, two canopy lower limbs of above-mentioned steel canopy retain 0.1 meter of spacing with lane, left and right side respectively.
What this optimal technical scheme was directly brought has the technical effect that, " two canopy lower limbs of steel canopy retain 0.1 meter of spacing with lane, left and right side respectively ", it is easy to the installation of canopy lower limb with in place: on floor, dig nest, plant canopy lower limb, by the canopy lower limb righting of inclination capplce lower surface (so that capplce holds out against on top board), this series of constructing operation in making its end, upper end hold out against.
In sum, the present invention, relative to prior art, has the advantages that
1, solve in goaf in disaster type process, particularly when tunnel blasting tunnels, back and two are helped to carry out the technical barrier of effective support. That is, the technical barrier kept the safety in production in second mining process in goaf is solved.
2, tunnelling and supporting is simple to operate, construction quickly, safety, Stability and dependability good; Simultaneously, it is ensured that the integrity of driving face top board, the time of second mining tunnelling is shortened in goaf.
3, achieve disaster type in goaf, improve the coal recovery rate of mine, extend the length of service of mine.
Accompanying drawing explanation
Fig. 1 be the present invention goaf in disaster type roadway head cross-sectional view;
Fig. 2 be the present invention goaf in disaster type roadway head plan structure schematic diagram (before explosion);
Fig. 3 be the present invention goaf in disaster type roadway head plan structure schematic diagram (after explosion);
Fig. 4 is front spy drill rod and the steel canopy frame package assembly schematic diagram of the present invention.
Description of reference numerals:
1, caliper brake Apparatus for hanging articles, 2, steel canopy, 3, driving face, 4, timber wedge, 5, drag conveyor, 6, front spy drill rod, 7, electric coal drill, 8, forestope, 9, landing net, 10, hydraulic prop, 101, offer the capplce of penetrating circular hole, 102, capplce, 103, canopy lower limb.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figures 1 to 4, disaster type tunnelling construction method in the goaf of the present invention, it adopts steel canopy 2 to carry out roadway support; In work progress, visit drill rod 6 before using and coordinate suspension type forestope 8 to carry out top board gib;
Above-mentioned steel canopy 2 is fabricated structure, and overall in " �� " font, quantity is some; Each setting steel-shelf 2 all includes two canopy lower limbs 103 and a capplce 102; Wherein, the upper flange of capplce 102 contacts with back, supports top board;
Above-mentioned canopy lower limb 102 and capplce 103 are I-steel, on the lower surface of the lower wing plate of each capplce 102, are provided with two caliper brake Apparatus for hanging articles 1;
Above-mentioned forestope 8 is a �� section steel beam, and the caliper brake Apparatus for hanging articles 1 above by former and later two is hung in the lower section of steel canopy capplce 102, and forestope 8 is near the spacing retaining 0.1��0.2m between that end, one end and driving face 3 of driving face 3;
A number of steel canopy 2 forms an equally spaced queue, it is sequentially arranged in driving face 3 front in tunnel, and pushing ahead along with driving face 3, constantly in the queue of original steel canopy 2, set up new steel canopy 2 near the anterior position place of that steel canopy 2 of driving face 3;
With far and near for principle of ordering with the relative distance of driving face 3, that steel canopy 2 near driving face 3 is first; Above-mentioned first setting steel-shelf is as pushing ahead of driving face 3, the dynamic changing process constantly replaced by new steel canopy;
On the web of above-mentioned first capplce 102, equidistantly offer a number of penetrating circular hole;
Concrete construction method, comprises the following steps:
The first step, in tunnel, 0.1-0.2 rice, driving face 3 front erection steel canopy 2;
Second step, uses electric coal drill 7, keeps its drilling rod to sequentially pass through above-mentioned each penetrating circular hole in the horizontal direction, beat a number of drill rod eye on driving face 3;
Wherein, the deep 1.5-1.8 rice of drill rod eye eye, front spy drill rod 6 length 1.8-2.0 rice, the quantity of drill rod eye is equal with above-mentioned penetrating circular hole quantity;
Then, respectively by a number of front spy drill rod 6 through corresponding each penetrating circular hole, and hammer into corresponding drill rod ophthalmic, during for explosion, top board is played a supporting role in protection;
3rd step, at above-mentioned drill rod side's 0.3-0.5 rice now, in exterior domain, to beat a number of borehole, adopts tunneling boring powder charge serial ignition of perforating to become lane, borehole eye distance to be 0.3-0.5 rice, the deep 1.2-1.4 rice of borehole eye, after filling explosive, ignites explosion;
Every explosion cyclic advance 1.0-1.1 rice, after explosion completes, confirmed site safety is without, after danger, visiting drill rod 6 Strengthening Roof supporting, then carry out looking for top before extracting out, and removes the crag of suspension and stone of living in time;
After looking for top to complete, spread landing net;
4th step, hydraulic prop 10 is used to coordinate long timber by landing net jack-up, hydraulic prop 10 should in an opposite direction to roadway head direction, to ensure that landing net 9 can seal top board, wrap driving face top rib, then two forestopes 8 are elapsed forward until its end is from the new driving face 0.1-0.2 rice position formed after explosion, again on the front of former first setting steel-shelf 2, forestope 8, shelve another root and offer the capplce 101 of penetrating circular hole, to set about installing the steel canopy 2 that a frame is new. Now the capplce 101 offering penetrating circular hole in former first setting steel-shelf being replaced to common capplce 102, such two capplces 101 offering penetrating circular hole are used alternatingly, it is ensured that have two capplces offering penetrating circular hole 101 in tunneling process; Before this operation and in operation process, tap at any time, and as required, timely use long handle instrument and dispose crag that may be present or stone of living;
Until another root capplce 102 above-mentioned shelve in place after, the contact surface at this capplce 102 with forestope 8 squeezes into timber wedge, so that the upper surface of this capplce holds out against back;
Then, start drag conveyor 5, by manually the coal being caving and spoil being shoveled respectively to drag conveyor 5, transport tunnel;
After the coal being caving and spoil are cleaned out, carry out the installation of two canopy lower limbs 103 of above-mentioned new steel canopy 2, until steel canopy 2 sets up complete, form the permanent support at this roadway position place.
5th step, repeats the above-mentioned first step to the 3rd step, until position, whole tunnel is respectively formed permanent support.
Disaster type tunnelling construction method in above-mentioned goaf, the spacing between its two adjacent steel canopies 2 is 1-1.6 rice.
Disaster type tunnelling construction method in above-mentioned goaf, it is when inclined shaft, in the hanging of forestope 8 and moving process, in addition it is also necessary to the use of anti-abseiling forestope fastened and be fixed on corresponding capplce 102, to prevent the forestope landing that gets loose from hurting sb.'s feelings.
Visiting drill rod 6 material before above-mentioned is steel alloy.
The quantity of above-mentioned penetrating circular hole is more than 5.
Two canopy lower limbs of above-mentioned steel canopy 2 retain 0.1 meter of spacing with lane, left and right side respectively.
For being more fully understood that the technical characterstic of the present invention, existing for 303 times, Taiping coalmine second mining district of holding Group Co., Ltd of Shandong, Shandong Thailand gate road driving, it is illustrated.
Embodiment 1
Taiping coalmine second mining district basic condition is as follows:
6301 work surfaces are total to extraction raw coal 79.2 ten thousand t from November, 1998 in November, 2000;
6303 work surfaces are total to extraction raw coal 88.2 ten thousand t in JIUYUE, 2002 October calendar year 2001;
6305 work surface in March, 2000 in the May, 2002 of extraction raw coal 67.5 ten thousand t altogether;
6307 work surface February calendar year 2001 to calendar year 2001 JIUYUE are extraction raw coal 46.9 ten thousand t altogether.
It is about 107.1 ten thousand t by calculating second mining district residual recoverable reserves.
303 times, second mining district gate road is within the scope of former 6305 work surfaces. The residue coal seam thickness being discarded in goaf after the back production of 6305 work surfaces is 0��5m, average 3m, belongs to regular coal seam, simple in construction, hardness factor f=2.5, containing clay rock horsestone one layer unstable in underlying seam, thick 0��0.68m, f=3, down with 6 coal facies from 44.08m.
Crossheading is constructed along seat earth, local passing fault or affected stone head of constructing by back production.
In 303 times, second mining district gate road design length 573m (flat from), the length of service 2 years.
In second mining process, the main material used:
1, connection reel wire: top is diamond mesh, and specification is length �� wide=2000 �� 1000mm. Stubble to be connected by net, connects with 16# iron wire between adjacent two pieces of nets, and junction point to be evenly arranged, spacing 100��200mm. Rhombus net mesh sheet thickness 14��20mm, mesh sheet unevenness��20mm, should without bite mark, without threading off; Plastic wire the key technical indexes: every linear meter(lin.m.) horizontal (vertical) direction hot strength >=30KN/m, every linear meter(lin.m.) horizontal (vertical) direction tensile elongation��25%.
2, steel canopy: 11# H steel ladder shape support for mine use, the clean long 2.6m of capplce; The long 2.6m of canopy lower limb.
3, timber wedge: made by hard timber, the basil is 15 ��.
4, forestope: the �� section steel beam of two root length degree 3400mm.
5, hydraulic prop: 2 DW25 (DW28) type hydraulic props, coordinates cap (0.1 �� 0.1 �� 1.2m3)��
6, blasted material: explosive: use two grades of emulsion explosive for coal mine, specification:Often volume weight 0.2kg; Detonator: selecting allowed for use in coal mines millisecond delay electric detonator, segment number is 1��5 section, and the extension time of final stage must not exceed 130ms; Exploder: use the mining capacitor blasting machine of FD200 or FD200T moulded coal, exploder should clean, drying, deposit without sulfide, non-poisonous material place, and has special messenger's keeping; Blow out bus: adopt ore deposit to allot " mobile light type cabtyre flexible cable for coal mines ", model MYQ-0.3/0.5 (1.0��2.5) mm2, must not have exposed joint, forbid to blow out with fixing bus.
Before 303 times, second mining district gate road tunneling construction, material therefor is standby complete. For strengthening Roof Control, this tunnelling adopts the construction principle of " short drilling depth, weak blast, microvariations ". When tunnel chance jay rock mass soft broken is serious, then adopt the construction principle of " fore-support, standing, the cultivation lower limb back of the body are helped ".
Below 303 times, second mining district gate road driving concrete construction method:
303 times, second mining district gate road is interior, 0.1 meter of driving face front, sets up steel canopy;
Use wind coal borer, its drilling rod is kept to sequentially pass through 5 penetrating circular holes that the forestope steel canopy first-class spacing of capplce web is offered in the horizontal direction, the integrity of top board of not existing together according to tunnel can increase the quantity (at least 5) of penetrating circular hole, makes a call to 5 drill rod eyes on driving face; Deep 1.5 meters of drill rod eye eye. Then, before 5, visit drill rod through corresponding each penetrating circular hole respectively, and hammer into corresponding drill rod ophthalmic, during for explosion, top board is played a supporting role in protection;
In region beyond above-mentioned drill rod now 0.3 meter, side, if beating borehole, snubber 4, reliever 11, periphery hole 21, base angle eye 9, totally 45 boreholes.Adopt tunneling boring powder charge serial ignition of perforating to become lane, borehole eye distance to be 0.5 meter, deep 1.0 meters of borehole eye, after filling explosive, ignite explosion;
Every explosion cyclic advance 1.0m, after explosion completes, confirmed site safety is without, after danger, visiting drill rod Strengthening Roof supporting, then carry out looking for top before extracting out, and removes the crag of suspension and stone of living in time;
303 times, second mining district gate road driving face coal petrography wall cementing properties is poor, coal wall caving, top board leakage cash phenomenon occurs, emits for avoiding driving face unsupported back span to cause greatly top board to take out, first paving landing net; Coordinate long timber by landing net jack-up with hydraulic prop again, hydraulic prop should in an opposite direction to roadway head direction, to ensure that landing net can seal top board, wrap driving face top rib.
Then elapse two forestopes forward until its end is from the new driving face 0.1m position formed after explosion, then on forestope, shelve new capplce, shelve another root and offer the capplce of penetrating circular hole, to set about installing the steel canopy that a frame is new. Now the capplce offering penetrating circular hole in former first setting steel-shelf being replaced to common capplce, such two capplces offering penetrating circular hole are used alternatingly; Before this operation and in operation process, tap at any time, and as required, timely use long handle instrument and dispose crag that may be present or stone of living; Contact surface at this capplce Yu forestope squeezes into timber wedge, so that the upper surface of this capplce holds out against back;
Then, start drag conveyor, by manually the coal being caving and spoil being shoveled respectively to drag conveyor, transport tunnel; After the coal being caving and spoil are cleaned out, carrying out the installation of two canopy lower limbs of above-mentioned new steel canopy, until steel frame sets complete, steel canopy spacing is 1.0m, forms the permanent support at this roadway position place. So circulation, until 303 times, second mining district gate road driving is complete, position is respectively formed permanent support.
Practical condition shows:
In 303 times, whole second mining district gate road tunneling process, the security incident such as roof caving, falling rocks does not occur, the permanent support safety that formed, good reliability.
Claims (6)
1. disaster type tunnelling method in a goaf, it is characterised in that: adopt steel canopy to carry out roadway support; In work progress, visit drill rod before using and coordinate suspension type forestope to carry out top board gib;
Described steel canopy is fabricated structure, and overall in " �� " font, quantity is some; Each setting steel-shelf all includes two canopy lower limbs and a capplce; Wherein, the upper surface of steel canopy capplce contacts with back, supports top board;
Described canopy lower limb and capplce are I-steel, on the lower surface of each capplce, are provided with two caliper brake Apparatus for hanging articles;
Described forestope is a �� section steel beam, former and later two above caliper brake Apparatus for hanging articles hang in the lower section of capplce, and forestope is near the spacing retaining 0.1-0.2 rice between that end, one end and driving face of driving face;
A number of steel canopy becomes equally spaced and is sequentially arranged in digging laneway, and along with the driving forward of driving face, constantly sets up new steel canopy in the anterior position of that setting steel-shelf near driving face, and circulation carries out and so forth;
With far and near for principle of ordering with the relative distance of driving face, that setting steel-shelf near driving face is first; Described first setting steel-shelf is as pushing ahead of driving face, the dynamic changing process constantly replaced by new steel canopy;
On the web of above-mentioned first capplce, equidistantly offer a number of penetrating circular hole, tunneling process has only to two capplces offering penetrating circular hole;
Concrete construction method, comprises the following steps:
The first step, in tunnel, 0.1-0.2 rice, driving face front erection steel canopy;
Second step, uses electric coal drill, keeps its drilling rod to sequentially pass through above-mentioned each penetrating circular hole in the horizontal direction, beat a number of drill rod eye on driving face;
Wherein, the deep 1.5-1.8 rice of drill rod eye eye, front spy drill rod length 1.8-2.0 rice, the quantity of drill rod eye is equal with above-mentioned penetrating circular hole quantity;
Then, respectively by a number of front spy drill rod through corresponding each penetrating circular hole, and hammer into corresponding drill rod ophthalmic, during for explosion, top board is played a supporting role in protection;
3rd step, in the region beyond above-mentioned drill rod now side's 0.3-0.5 rice, beats a number of borehole, tunneling boring powder charge serial ignition of perforating is adopted to become lane, borehole eye distance is 0.3-0.5 rice, the deep 1.2-1.4 rice of borehole eye, after filling explosive, ignites explosion;
Every explosion cyclic advance 1.0-1.1 rice, after explosion completes, confirmed site safety is without, after danger, visiting drill rod Strengthening Roof supporting, then carry out looking for top before extracting out, and removes the crag of suspension and stone of living in time;
After looking for top to complete, spread landing net;
4th step, hydraulic prop is used to coordinate long timber by landing net jack-up, hydraulic prop should in an opposite direction to roadway head direction, to ensure that landing net can seal top board, wrap driving face top rib, then two forestopes are elapsed forward until its end is from new 0.1��0.2 meter of position of driving face formed after explosion, again on the front of former first setting steel-shelf, forestope, shelve another root and offer the capplce of penetrating circular hole, to set about installing the steel canopy that a frame is new; Now the capplce offering penetrating circular hole in former first setting steel-shelf being replaced to common capplce, such two capplces offering penetrating circular hole are used alternatingly, it is ensured that have two capplces offering penetrating circular hole in tunneling process; Before this operation and in operation process, tap at any time, and as required, timely use long handle instrument and dispose crag that may be present or stone of living;
Until another root capplce above-mentioned shelve in place after, the contact surface at this capplce Yu forestope squeezes into timber wedge, so that the upper surface of this capplce holds out against back;
Then, start drag conveyor, by manually the coal being caving and spoil being shoveled respectively to drag conveyor, transport tunnel;
After the coal being caving and spoil are cleaned out, carry out the installation of two canopy lower limbs of above-mentioned new steel canopy, until steel frame sets complete, form the permanent support at this roadway position place;
5th step, repeats the above-mentioned first step to the 3rd step, until position, whole tunnel is respectively formed permanent support.
2. disaster type tunnelling construction method in goaf according to claim 1, it is characterised in that the adjacent spacing between two steel canopies is 1-1.6 rice.
3. disaster type tunnelling construction method in goaf according to claim 1, it is characterized in that, when inclined shaft, in the hanging of forestope and moving process, also need to fastened by forestope with the use of anti-abseiling and be fixed on corresponding capplce, to prevent the forestope landing that gets loose from hurting sb.'s feelings.
4. disaster type tunnelling construction method in goaf according to claim 1, it is characterised in that visiting drill rod material before described is steel alloy.
5. disaster type tunnelling construction method in goaf according to claim 1, it is characterised in that the quantity of described penetrating circular hole is more than 5.
6. according to disaster type tunnelling construction method in the arbitrary described goaf of claim 1-5, it is characterised in that two canopy lower limbs of described steel canopy retain the spacing of 0.1 meter with lane, left and right side respectively.
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| CN107386978A (en) * | 2017-08-22 | 2017-11-24 | 安徽理工大学 | The axle slotting of coal rock tunnel three is punchinged broken rock device |
| CN109838237A (en) * | 2019-04-15 | 2019-06-04 | 中国矿业大学 | A kind of contiguous seams are upper and lower by for collaboration recovery method |
| CN110029995A (en) * | 2019-04-15 | 2019-07-19 | 中国矿业大学 | A kind of contiguous seams are upper and lower by for collaboration exploitation excavation replacement design method |
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| CN109838237A (en) * | 2019-04-15 | 2019-06-04 | 中国矿业大学 | A kind of contiguous seams are upper and lower by for collaboration recovery method |
| CN110029995A (en) * | 2019-04-15 | 2019-07-19 | 中国矿业大学 | A kind of contiguous seams are upper and lower by for collaboration exploitation excavation replacement design method |
| CN109838237B (en) * | 2019-04-15 | 2020-01-03 | 中国矿业大学 | Close-distance coal seam up-down successive-replacing collaborative mining method |
| CN114086984A (en) * | 2021-11-28 | 2022-02-25 | 安徽太平矿业有限公司 | Ruin digging and branch digging process for extremely-broken surrounding rock roadway |
| CN114086984B (en) * | 2021-11-28 | 2022-07-22 | 安徽太平矿业有限公司 | Ruin digging and branch digging process for polar broken surrounding rock roadway |
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