CN108252651A - The method of fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate - Google Patents
The method of fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate Download PDFInfo
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- CN108252651A CN108252651A CN201810029026.7A CN201810029026A CN108252651A CN 108252651 A CN108252651 A CN 108252651A CN 201810029026 A CN201810029026 A CN 201810029026A CN 108252651 A CN108252651 A CN 108252651A
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- 238000005065 mining Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000006185 dispersion Substances 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 239000011435 rock Substances 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000004880 explosion Methods 0.000 claims description 44
- 239000003245 coal Substances 0.000 claims description 42
- 239000011159 matrix material Substances 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 239000004927 clay Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000005728 strengthening Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000002360 explosive Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/007—Drilling by use of explosives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a kind of methods of fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate, by determining that drilling machine installs angle, and borehole hole termination depth, angle and borehole spacing, borehole number are determined according to Roof rock feature according to the maximum and minimum mining height of the stent for cutting intraocular installation at the scene；And set borehole on upper crossheading and lower crossheading, the borehole for disperseing run-in index carries out presplitting to top plate, the present invention provides a kind of method of fully-mechanized mining working multi-point dispersion run-in index borehole Advance presplitting face roof, be conducive to being caving completely for top plate, reduce outstanding top utmostly interior and be caving impact range, improve roof caving efficiency.
Description
Technical field
The invention belongs to coal mining field, more particularly to fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate
Method.
Background technology
Fully mechanized coal face carries out initial mining and discharging, according to previous experiences and mode, to ensure that working face is suitable after installing
Sharp preliminary roof caving needs to arrange multigroup deep hole borehole to working face side direction in upper and lower crossheading respectively, with advance of the face process
In to reach Advance presplitting top plate, the purpose that top plate is made smoothly to be caving, but this method perforating time is long, labor intensive, material resources, work
When it is more, and comprehensive presplitting is ineffective, and often in advance of the face 30-40m or so, top plate, which just will appear, to be caving, and is hanged and is pushed up
The shock wave that area is big, adjoint when being caving endangers larger, roof falling over great extent to working face operating personnel and mechanical equipment
Dust, the toxic and harmful gas of Shi Yangqi easily cause the generation of accident.
Invention content
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of fully-mechanized mining working multiple spot point
The method of run-in index borehole presplitting top plate is dissipated, is conducive to being caving completely for top plate, outstanding top is reduced utmostly interior and is caving punching
It hits range, improve roof caving efficiency.
Technical solution：To achieve the above object, technical scheme is as follows：
The method of fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate, includes the following steps：
Step 1：Determine that drilling machine installs angle, and according to top plate according to the maximum and minimum mining height of the stent for cutting intraocular installation
Lithology determines borehole hole termination depth, angle and borehole spacing, borehole number；
Step 2：Intraocular, which is cut, in coal working face sets borehole, the borehole spacing back production side coal wall and working face coal wall
Set, and the borehole favour face roof, be parallel to working face tendency set, if dry hole with mutually equidistantly along work
It cuts eye tendency and uniformly sets in face；
Step 3：Set first group of borehole in upper crossheading, first group of borehole includes upper crossheading borehole S1 and upper suitable
Slot borehole S2, crossheading back production side coal wall and working face coal wall are set, and the upper crossheading borehole S1 in upper crossheading borehole S1 spacing
Favour face roof, be parallel to crossheading trend set；In the upper crossheading borehole S2 spacing mono- meter of crossheading borehole S1 away from
From setting；Then easer is set in upper crossheading length direction successively spacing；
Step 4：The constructing operation step of step 3, lower crossheading borehole distribution and upper crossheading borehole are repeated in lower crossheading
Distribution is consistent；
Step 5：Cut intraocular, on dispose explosion pack in the borehole of crossheading and lower crossheading, first using several during sealing clay
A water stemming material is gently smash into explosion pack bottom, reuses the sealing of clay stemming, clay stemming sealing clay to aperture；
Step 6：Explosion is carried out by the sequence of working face open-off cut eye to the supreme crossheading of lower crossheading, working face open-off cut intraocular arrangement
Borehole is grouped explosion successively from head to tail, and the borehole arranged in upper and lower crossheading is grouped quick-fried successively from inside to outside
It is broken；
Step 7：Goaf top plate is observed during the advance of the face and is caving situation, it is advanced pre- if roof caving is abundant
It splits blasting work to terminate, if roof caving is insufficient, working face and upper and lower crossheading continue to set borehole straight according to above scheme
To roof caving.
Further, it cuts intraocular borehole and explosion is carried out before working surface hydraulic support is installed to trial production, it is upper and lower suitable
Borehole in the range of slot distance working face coal wall 35m, carries out explosion, apart from working face before working face is installed to trial production
Borehole outside coal wall 35m ranges, with working face extraction in advance to working face coal wall 35m when carry out explosion.
Further, explosion is using grouping powder charge grouping explosion, per one group of separate explosion, per separate explosion no more than 3 borehole；
Upper crossheading is per separate explosion 2, the every separate explosion 1 of lower crossheading, cuts intraocular per separate explosion 3, and powder charge uses positive powder charge, is fried in group
Medicine, which is adopted, to be connected serially.
Further, including drilling rod, one end of the drilling rod is equipped with detachable drill bit, and the drill bit includes matrix
Be wholely set cutter on the matrix, described matrix is taper structure, and described matrix is coaxially disposed with drilling rod, institute
It states the small end of matrix outwardly, and blade assembly is provided on the small end of described matrix, the blade assembly includes several circles
The broken blade of row arrangement setting, cutter equidistant interval described in three groups is arranged on the outside of matrix, and the cutter is higher by matrix
Top.
Further, the cutter is Wedge type block structure, and the cammed surface of the cutter is towards the axis of drilling rod, and
The cammed surface is tilted towards the side far from base end and sets, and is inlayed in the cammed surface and is provided at least one edge of a knife edge
Part, the edge of a knife mold insert are oppositely arranged with blade assembly, are inlayed on the outside of the cutter and are provided at least one reinforcing mold insert, institute
It states and strengthens mold insert as strip hard alloy, and the axis direction setting for strengthening the parallel drilling rod of mold insert, the reinforcing mold insert
Outer ledge protrudes the lateral surface of cutter.
Further, perforation offers apopore in described matrix, and several apopores are set respectively close to cutter, and
The apopore is tilted to be set towards the cammed surface of adjacent cutter.
Advantageous effect：The present invention changes the thoughtcast of previous crossheading centralization presplitting, takes and is cutting eye and upper and lower crossheading
The method for arranging multi-point dispersion run-in index borehole Advance presplitting face roof, is conducive to being caving completely for top plate, in maximum journey
Area of suspension roof is reduced in degree, outstanding top is reduced and is caving impact range, improves roof caving efficiency, it is ensured that fully-mechanized mining working
Safety, can efficiently, favorably accomplish initial mining and discharging；A kind of drilling rod set for borehole is further comprised, effectively adapts to difference
The borehole of geological conditions set, reduce bit freezing phenomenon.
Description of the drawings
Step block diagram of the attached drawing 1 for the present invention；
Attached drawing 2 arranges vertical view for the borehole of the present invention；
Attached drawing 3 arranges front view for the borehole of the present invention；
Jackrod structure schematic diagram of the attached drawing 4 for the present invention.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in attached drawing 1 to attached drawing 3, the method for fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate, including with
Lower step：
Step 1：Determine that drilling machine installs angle, and according to top plate according to the maximum and minimum mining height of the stent for cutting intraocular installation
Lithology determines borehole hole termination depth, angle and borehole spacing, borehole number；
Step 2：Intraocular, which is cut, in coal working face sets borehole, the borehole spacing back production side coal wall and working face coal wall
Set, and the borehole favour face roof, be parallel to working face tendency set, if dry hole with mutually equidistantly along work
It cuts eye tendency and uniformly sets in face；
Step 3：Set first group of borehole in upper crossheading, first group of borehole includes upper crossheading borehole S1 and upper suitable
Slot borehole S2, crossheading back production side coal wall and working face coal wall are set, and the upper crossheading borehole S1 in upper crossheading borehole S1 spacing
Favour face roof, be parallel to crossheading trend set；In the upper crossheading borehole S2 spacing mono- meter of crossheading borehole S1 away from
From setting；Then easer is set in upper crossheading length direction successively spacing；
Step 4：The constructing operation step of step 3, lower crossheading borehole distribution and upper crossheading borehole are repeated in lower crossheading
Distribution is consistent；
Step 5：Cut intraocular, on dispose explosion pack in the borehole of crossheading and lower crossheading, first using several during sealing clay
A water stemming material is gently smash into explosion pack bottom, reuses the sealing of clay stemming, clay stemming sealing clay to aperture；
Step 6：Explosion is carried out by the sequence of working face open-off cut eye to the supreme crossheading of lower crossheading, working face open-off cut intraocular arrangement
Borehole is grouped explosion successively from head to tail, and the borehole arranged in upper and lower crossheading is grouped quick-fried successively from inside to outside
It is broken；
Step 7：Goaf top plate is observed during the advance of the face and is caving situation, it is advanced pre- if roof caving is abundant
It splits blasting work to terminate, if roof caving is insufficient, working face and upper and lower crossheading continue to set borehole straight according to above scheme
To roof caving.
It cuts intraocular borehole and explosion is carried out before working surface hydraulic support is installed to trial production, upper and lower crossheading is apart from work
Make the borehole in the range of the coal wall 35m of face, explosion is carried out before working face is installed to trial production, apart from working face coal wall 35m
Borehole outside range, with working face extraction in advance to working face coal wall 35m when carry out explosion.
Explosion is using grouping powder charge grouping explosion, per one group of separate explosion, per separate explosion no more than 3 borehole；Upper crossheading is every
Separate explosion 2, lower crossheading per separate explosion 1, cut intraocular per separate explosion 3, powder charge is using positive powder charge, and explosive is using string in group
Connection mode connects.
The present invention changes the thoughtcast of previous crossheading centralization presplitting, takes and is cutting eye and upper and lower crossheading arrangement multiple spot
Disperse the method for run-in index borehole Advance presplitting face roof, be conducive to being caving completely for top plate, in utmostly interior diminution
Area of suspension roof reduces outstanding top and is caving impact range, improves roof caving efficiency, it is ensured that fully-mechanized mining working safety, it can
Efficiently, initial mining and discharging is favorably accomplished.In production application, stent, which is fully advanced, to be cut in the range of a 5-10m, and top plate is complete
It is caving, than that can be caving in the range of previous methods 30-40m, the Roof Span of 25-30m is shortened, in the 25-30m ranges
Inner working face can caving coal mining, coal mining yield can be increased, increased economic efficiency.
Illustrate by taking the practical application in the production of one coal mining activity of Aksu Prefecture as an example below, in fully mechanized coal face in rule
Rectangle arrangement, cut eye long 60m, the upper long 706.2m of crossheading, the lower long 703.5m of crossheading, working face average trend length is
704.9m, 5.2~5.8m of coal seam thickness, average 5.5m, 22 °~30 ° of seam inclination, averagely about 27 ° of the working face gradient, working face
Length is cut as 58.6m, upper and lower crossheading and cuts and does not disclose rift structure in a tunneling process, working face geology condition is simple.
Working face uses ZF4800/17/30 hydraulic supports and ZFG4800/19/32 type transitional hydraulic bracket supporting roofs, at the scene root
Determine that drilling machine installs angle, and borehole end hole depth is determined according to Roof rock feature according to the maximum and minimum mining height of the stent for cutting intraocular installation
Degree, angle and borehole spacing, borehole number finally determine that borehole sets scheme.
After working face open-off cut eye expands brush, intraocular is cut respectively apart from upper crossheading back production side coal wall 3m positions and 90m positions,
Respectively one KHYD155 type rock drill of arrangement.Using KHYD155 rock drills, intraocular construction presplitting is being cut according to design requirement
Top plate eye, after cutting the construction of intraocular jewel hole, drilling machine is transported respectively to the presplitting top plate eye in upper and lower crossheading construction crossheading.According to
Roof rock feature influences before similar to the equipment equipped in working face presplitting top plate experience, selected rock drill condition of compatibility, crossheading
Etc. combined factors consider, presplitting top plate eye design it is as follows：
Cut the design of intraocular presplitting top plate eye：First group of borehole：Apart from upper crossheading back production side coal wall 3m, apart from working face coal wall
0.5m, with face roof angle be 75 °, be parallel to working face tendency (towards upper end direction), hole termination depth 8m.Remaining big gun
Eye：Each borehole with upper borehole spacing 3m, apart from working face coal wall 0.5m, with 75 ° of face roof angle, be parallel to work
Make face tendency (towards upper end direction), hole termination depth 8m.Working face open-off cut eye is inclined to length 186.5m, adds up to hole placing 60
It is a.
Upper crossheading presplitting top plate eye design：S1# boreholes：Distance cuts an old man side coal wall 5m, apart from upper crossheading back production side coal
Wall 1.5m, with crossheading top plate angle be 75 °, be parallel to crossheading trend (towards goaf direction), hole termination depth 8m.
S2# boreholes：Distance cuts an old man side coal wall 5m, apart from upper crossheading back production side coal wall 2.5m and crossheading top plate angle
For 75 °, be parallel to crossheading trend (towards goaf direction), hole termination depth 8m.
Remaining borehole：One group of borehole spacing 3m on every group of hole spacing, every group of remaining parameter of borehole is with reference to S1#, S2# borehole
Construction.
Lower crossheading presplitting top plate eye design：X1# boreholes：Distance cuts an old man side coal wall 5m, apart from lower crossheading back production side coal
Wall 1.5m, with 75 ° of crossheading top plate angle, be parallel to crossheading trend (towards goaf direction), hole termination depth 8m.Remaining borehole：
A borehole spacing 3m on each hole spacing, every group of remaining parameter of borehole is with reference to the construction of X1# boreholes.
Borehole is grouped explosion successively after constructing, and ensures the propulsion of working face and coal seam back production.
As shown in Figure 4, a kind of drilling rod 1 for fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate, it is described
One end of drilling rod 1 is equipped with detachable drill bit, facilitates repair with replacing, and the drill bit includes matrix 8 and is integrally disposed upon
Cutter 2 in described matrix 8, described matrix 8 is taper structure, and described matrix 8 is coaxially disposed with drilling rod, described matrix 8
Small end outwardly, and blade assembly 5 is provided on the small end of described matrix 8, the blade assembly 5 includes several circular array row
The broken blade of setting is arranged, 2 equidistant interval of cutter is arranged on the outside of matrix 8 described in three groups, and the cutter 2 is higher by matrix 8
Top.Since in practical exploitation work, different geographical, different zones, the geology of different depth, soil property is not
Together, there are hard, sticky big or a variety of environment such as the soil is porous, general drilling rod is encountering the more loose soil of soil property and viscosity is larger
Soil property when, easily bored or bit freezing there is a situation where viscous, lead to drill rod abrasion, extremely influence progress, by the present invention
Drilling rod can efficiently solve the problem of soil glues brill and bit freezing, by prominent cutter crush in advance and hack is carried out
Water conservancy diversion makes hack have more space external mobile to drilling, avoids soil accumulation and is collected between cutter and soil to be drilled,
Reduce the situation that clay glues brill and bit freezing, and further hack is carried out by blade assembly 5 simultaneously, prevent the soil block of bulk
Formation.
The cutter 2 is Wedge type block structure, and the cammed surface 7 of the cutter is towards the axis of drilling rod, and it is described tiltedly
Wedge surface 7 is tilted towards the side far from 8 end of matrix and sets, and is inlayed in the cammed surface 7 and is provided at least one edge of a knife mold insert 6,
The edge of a knife mold insert 6 is oppositely arranged with blade assembly 5, and the soil drilled through is moved by inclined wedge towards the intermediate region that cutter encloses
It is dynamic, and crushed when drilling rod is rotated by broken blade, while edge of a knife mold insert 6 plays the role of increasing tool strength, reduces knife
The abrasion of tool, the outside of the cutter 2, which is inlayed, is provided at least one reinforcing mold insert 3, and the reinforcing mold insert 3 is closed for strip hard
Gold, and the axis direction setting for strengthening 3 parallel drilling rod of mold insert, the outer ledge for strengthening mold insert 3 protrude the outer of cutter 2
Side.In drilling, the rubble in soil or hard object are crushed by strengthening mold insert 3 and edge of a knife mold insert 6, improve cutter
Service life.
Perforation offers apopore 4 in described matrix 8, and several apopores 4 are set, and described respectively close to cutter 2
Apopore 4 tilts the cammed surface setting towards adjacent cutter 2.Driller Exothermic amount during drilling is reduced, increases the durability of cutter,
Drop heat can be also carried out to the edge of a knife mold insert 6 in cammed surface simultaneously and is rinsed, prevents bit freezing.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
1. the method for fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate, it is characterised in that：Include the following steps：
Step 1：Determine that drilling machine installs angle, and according to Roof rock feature according to the maximum and minimum mining height of the stent for cutting intraocular installation
It determines borehole hole termination depth, angle and borehole spacing, borehole number, and borehole is carried out by the drilling rod (1) on drilling machine and is set；
Step 2：Intraocular, which to be cut, in coal working face sets borehole, the borehole spacing back production side coal wall and working face coal wall are set,
And the borehole favour face roof, be parallel to working face tendency set, if dry hole is with mutually equidistantly along working face open-off cut
Eye tendency is uniformly set；
Step 3：First group of borehole is set in upper crossheading, first group of borehole includes upper crossheading borehole S1 and upper crossheading big gun
Eye S2, crossheading back production side coal wall and working face coal wall are set in upper crossheading borehole S1 spacing, and the upper crossheading borehole S1 is tilted
In face roof, be parallel to crossheading trend set；The distance of mono- meter of crossheading borehole S1 is beaten in the upper crossheading borehole S2 spacing
If；Then easer is set in upper crossheading length direction successively spacing；
Step 4：The constructing operation step of step 3 is repeated in lower crossheading, lower crossheading borehole distribution is distributed with upper crossheading borehole
Unanimously；
Step 5：Cut intraocular, on dispose explosion pack in the borehole of crossheading and lower crossheading, when sealing clay, first uses several water
Stemming is gently smash into explosion pack bottom, reuses the sealing of clay stemming, clay stemming sealing clay to aperture；
Step 6：Explosion, the borehole of working face open-off cut intraocular arrangement are carried out by the sequence of working face open-off cut eye to the supreme crossheading of lower crossheading
It is grouped explosion successively from head to tail, the borehole arranged in upper and lower crossheading is grouped explosion successively from inside to outside；
Step 7：Goaf top plate is observed during the advance of the face and is caving situation, if roof caving is abundant, Advance presplitting is quick-fried
Broken work terminates, if roof caving is insufficient, working face and upper and lower crossheading continue to set borehole until top according to above scheme
Plate is caving.
2. the side of fully-mechanized mining working multi-point dispersion run-in index borehole Advance presplitting face roof according to claim 1
Method, it is characterised in that：It cuts intraocular borehole and explosion, upper and lower crossheading is carried out before working surface hydraulic support is installed to trial production
Borehole in the range of working face coal wall 35m, carries out explosion before working face is installed to trial production, apart from working face coal
Borehole outside wall 35m ranges, with working face extraction in advance to working face coal wall 35m when carry out explosion.
3. the method for fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate according to claim 1, feature exist
In：Explosion is using grouping powder charge grouping explosion, per one group of separate explosion, per separate explosion no more than 3 borehole；Upper crossheading is per separate explosion
2, lower crossheading per separate explosion 1, cut intraocular per separate explosion 3, powder charge is using positive powder charge, and explosive uses series system in group
Connection.
4. the method for fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate according to claim 1, feature exist
In：One end of the drilling rod (1) is equipped with detachable drill bit, and the drill bit includes matrix (8) and is integrally disposed upon described
Cutter (2) on matrix (8), described matrix (8) is taper structure, and described matrix (8) is coaxially disposed with drilling rod, the base
The small end of body (8) outwardly, and is provided with blade assembly (5) on the small end of described matrix (8), the blade assembly (5) if including
The broken blade of dry circular array arrangement setting, cutter (2) equidistant interval described in three groups are arranged on the outside of matrix (8), and institute
State the top that cutter (2) is higher by matrix (8).
5. the method for fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate according to claim 4, feature exist
In：The cutter (2) is Wedge type block structure, and the cammed surface (7) of the cutter is towards the axis of drilling rod, and the inclined wedge
Face (7) is tilted towards the side far from matrix (8) end and sets, and is inlayed on the cammed surface (7) and is provided at least one edge of a knife edge
Part (6), the edge of a knife mold insert (6) are oppositely arranged with blade assembly (5), are inlayed on the outside of the cutter (2) and are provided at least one
A reinforcing mold insert (3), the mold insert (3) of strengthening is strip hard alloy, and the axis side for strengthening the parallel drilling rod of mold insert (3)
To setting, the lateral surface of outer ledge protrusion cutter (2) for strengthening mold insert (3).
6. the method for fully-mechanized mining working multi-point dispersion run-in index borehole presplitting top plate according to claim 5, feature exist
In：Perforation offers apopore (4) in described matrix (8), and several apopores (4) are set respectively close to cutter (2), and institute
The cammed surface for stating apopore (4) inclination towards adjacent cutter (2) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029026.7A CN108252651B (en) | 2018-01-12 | 2018-01-12 | Method for fully mechanized mining face multipoint dispersion parallel type blast hole presplitting roof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029026.7A CN108252651B (en) | 2018-01-12 | 2018-01-12 | Method for fully mechanized mining face multipoint dispersion parallel type blast hole presplitting roof |
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| Publication Number | Publication Date |
|---|---|
| CN108252651A true CN108252651A (en) | 2018-07-06 |
| CN108252651B CN108252651B (en) | 2020-01-10 |
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|---|---|---|---|
| CN201810029026.7A Active CN108252651B (en) | 2018-01-12 | 2018-01-12 | Method for fully mechanized mining face multipoint dispersion parallel type blast hole presplitting roof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645854A (en) * | 2019-09-29 | 2020-01-03 | 太原理工大学 | Pre-splitting blast hole for arranging initial mining hard roof of fully mechanized mining face and online detonating method |
| CN110685691A (en) * | 2019-11-16 | 2020-01-14 | 山东科技大学 | Forced roof caving method for hard roof |
| CN113107486A (en) * | 2021-03-02 | 2021-07-13 | 库车县科兴煤炭实业有限责任公司 | Coal face primary mining and primary discharge drilling construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645854A (en) * | 2019-09-29 | 2020-01-03 | 太原理工大学 | Pre-splitting blast hole for arranging initial mining hard roof of fully mechanized mining face and online detonating method |
| CN110645854B (en) * | 2019-09-29 | 2022-03-04 | 太原理工大学 | Pre-splitting blast hole for arranging initial mining hard roof of fully mechanized mining face and online detonating method |
| CN110685691A (en) * | 2019-11-16 | 2020-01-14 | 山东科技大学 | Forced roof caving method for hard roof |
| CN110685691B (en) * | 2019-11-16 | 2020-12-01 | 山东科技大学 | Forced roof caving method for hard roof |
| CN113107486A (en) * | 2021-03-02 | 2021-07-13 | 库车县科兴煤炭实业有限责任公司 | Coal face primary mining and primary discharge drilling construction method |
| CN113107486B (en) * | 2021-03-02 | 2023-09-19 | 库车县科兴煤炭实业有限责任公司 | Initial mining and initial setting drilling construction method for coal face |
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