CN113622912B - Outburst elimination technology for coal mining - Google Patents
Outburst elimination technology for coal mining Download PDFInfo
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- CN113622912B CN113622912B CN202110874310.6A CN202110874310A CN113622912B CN 113622912 B CN113622912 B CN 113622912B CN 202110874310 A CN202110874310 A CN 202110874310A CN 113622912 B CN113622912 B CN 113622912B
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- 239000003245 coal Substances 0.000 title claims abstract description 162
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 42
- 238000005065 mining Methods 0.000 title claims abstract description 30
- 230000008030 elimination Effects 0.000 title abstract description 16
- 238000005516 engineering process Methods 0.000 title description 2
- 238000005520 cutting process Methods 0.000 claims abstract description 110
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims description 67
- 230000005540 biological transmission Effects 0.000 claims description 39
- 210000003813 thumb Anatomy 0.000 claims description 9
- 238000005553 drilling Methods 0.000 abstract description 29
- 230000008569 process Effects 0.000 abstract description 14
- 238000000605 extraction Methods 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 230000035699 permeability Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000003795 desorption Methods 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 description 12
- 239000010410 layer Substances 0.000 description 11
- 230000005641 tunneling Effects 0.000 description 11
- 238000007599 discharging Methods 0.000 description 10
- 239000003638 chemical reducing agent Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000003818 cinder Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/56—Slitting by cutter cables or cutter chains or by tools drawn along the working face by cables or the like, in each case guided parallel to the face, e.g. by a conveyor or by a guide parallel to a conveyor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
- E21C31/02—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
The invention belongs to the technical field of coal seam exploitation, and particularly relates to a outburst elimination process for coal seam exploitation. According to the process, seam cutting and outburst elimination equipment is assembled in the first roadway and/or the second roadway, seam cutting is carried out on the coal seam of the working face to form continuous outburst elimination seams, displacement and expansion deformation spaces can be created for coal bodies outside the seam, so that coal body cracks are increased, desorption and emission of gas are accelerated, pressure relief extraction of gas in a coal body of a mining section is achieved, and the outburst elimination purpose is achieved. The method greatly improves the air permeability of the coal bed, is beneficial to quick release of gas, and can effectively reduce labor intensity and gas extraction period, reduce investment of manpower and financial resources and save cost compared with the traditional intensive drilling mode.
Description
Technical Field
The invention belongs to the technical field of coal seam exploitation, and particularly relates to a outburst elimination process for coal seam exploitation.
Background
Along with the gradual exhaustion of shallow coal resources, the coal mine in China sequentially enters a deep mining stage, and the serious coal and gas outburst disasters are more serious, and the pre-extracted coal bed gas and the mining protection layer are effective outburst elimination measures for the safety mining of the outburst coal bed. Regardless of the mining conditions of the protective layer, ground drilling, through-layer drilling or sequential drilling pre-pumping of coal seam gas is a necessary choice for eliminating outburst of the coal seam. The gas drilling of the pre-pumped coal seam is a main factor for restricting the succession of mine production due to the large drilling engineering amount and long construction period. There are also a small number of mines which use the weak mudstone of the top/bottom of the mined coal seam as a protective layer, and the outburst elimination of the outburst coal seam is realized by matching with the gas of the pre-pumped coal seam of the drilling. The exploitation of mudstone as a protective layer not only increases the investment of gas control, but also still requires drilling to extract coal bed gas, and in addition, the exploitation of the mudstone also forms the emission of solid waste.
In the gas control process of the single outburst coal seam, a first roadway and a second roadway are generally constructed, a first-roadway-penetrating drilling hole is used for pre-pumping coal seam strip gas, after outburst elimination of a coal seam strip area is achieved, a first-roadway-penetrating drilling hole is used for pre-pumping coal seam gas, a second-roadway-penetrating drilling hole is used for pre-pumping coal seam gas, and coal seam enhancement and permeability improvement measures are matched. On one hand, the number of sequential drilling holes is large, the drilling construction work amount is huge, a large amount of manpower, material resources and financial resources are required to be consumed, and the added value is extremely low; on the other hand, because the deep coal mine is deeper, the drilling single hole length is large, the drilling track is easy to deviate, the effective coverage of the whole area of the coal seam in the range of the working face is difficult to ensure, a blank zone is formed, the local place outburst elimination is not up to standard, and the potential safety hazard is buried for the mining of the working face.
Disclosure of Invention
Aiming at the defects and problems of large drilling quantity, large consumption of manpower and financial resources, easy deviation of drilling tracks and substandard outburst elimination of the existing intensive drilling outburst elimination process, the invention abandons the traditional outburst elimination mode of arranging drilling, provides a process for releasing pressure by cutting a coal seam to form continuous outburst elimination seams, is more beneficial to gas release, improves the safety of underground construction, effectively reduces labor intensity and gas extraction period, reduces investment of manpower and financial resources and saves cost.
The invention solves the technical problems by adopting the scheme that: a coal seam exploitation outburst elimination process comprises the following steps:
firstly, constructing a working roadway along the depth at the position of a main roadway on a coal seam, and constructing a first roadway and a second roadway along the transverse direction at the left end and the right end of the working roadway;
then, constructing primary cutting holes at the tail ends of the first roadway and the second roadway to communicate the first roadway and the second roadway, wherein the primary cutting holes are initial positions of seam cutting;
then, a working platform is paved on the ground of the first roadway and/or the second roadway, a chain plate machine is arranged on the ground in front of the working platform and the coal seam, a coal seam slotting and outburst eliminating device is arranged on the working platform, the coal seam slotting and outburst eliminating device comprises a traveling driving mechanism and a slotting mechanism, the slotting mechanism is connected with the traveling driving mechanism, the traveling driving mechanism is used for traveling on the working platform and advancing, and the slotting mechanism is placed at an initial cutting hole position communicated with the first roadway and the second roadway and integrally cuts the coal seam along with the traveling of the traveling driving mechanism to form a cutting seam.
The coal seam exploitation outburst elimination process comprises the walking driving mechanism, wherein the walking driving mechanism comprises a walking platform and a driving motor or a hydraulic motor, the driving motor or the hydraulic motor is arranged on the walking platform, and a supporting sleeve corresponding to an output rotating shaft of the driving motor or the hydraulic motor is arranged on the walking platform; the slotting mechanism is a spiral cutter, the spiral cutter comprises a cylindrical central shaft and a spiral cutter body, the cutter body is arranged at the outer side of the central shaft, a spiral discharging channel is formed at the outer side of the central shaft, and raised cutter heads are arranged at intervals at the outer side of the cutter body; one end of the central shaft is sleeved in the supporting sleeve and is in transmission connection with an output rotating shaft of the driving motor or the hydraulic motor.
According to the coal seam mining outburst elimination process, the walking crawler belt is arranged at the bottom of the walking platform, the supporting oil cylinder which is vertically arranged is arranged on the walking platform, the supporting seat is arranged on the upper portion of the supporting oil cylinder, and the driving motor or the hydraulic motor is arranged on the supporting seat.
According to the coal seam mining outburst elimination process, the reinforcing support frame is fixed on one side of the walking platform, and the support sleeve is fixed at the end part of the reinforcing support frame and corresponds to the output rotating shaft of the driving motor or the hydraulic motor.
According to the coal mining outburst elimination process, the other end of the spiral cutting knife penetrates into the coal seam, the jacking sleeve is rotatably arranged, the jacking rod is located at the rear side of the spiral cutting knife, the rod body of the jacking sleeve is fixed on the outer side of the jacking sleeve, and the cylinder body of the jacking sleeve is fixed on the coal seam.
According to the coal seam mining outburst elimination process, the central shaft comprises a plurality of shaft units, independent cutter bodies are arranged on each shaft unit, the shaft units are connected in a butt joint mode, and adjacent cutter bodies are correspondingly connected together to form a spiral discharging channel.
According to the coal seam mining outburst elimination process, the driving motors or the hydraulic motors are arranged at the two ends of the central shaft, and the driving motors or the hydraulic motors at the two sides are respectively fixed on the corresponding walking platforms and walk in the roadway at the corresponding side.
According to the coal seam mining outburst elimination process, the central shaft comprises the plurality of flexible shaft units, the flexible shaft units are connected through the universal joint to form an integrated central flexible shaft, two ends of the central flexible shaft are sleeved in the supporting sleeve and are in transmission connection with the output rotating shaft, the cutter body is spirally arranged on the central flexible shaft, and the cutter heads are arranged on the outer side face of the cutter body at intervals.
According to the coal seam mining outburst elimination process, the continuous spiral conveying bodies and the intermittent cutter bodies are spirally arranged on the central flexible shaft, independent cutter bodies are arranged on each flexible shaft unit, cutter heads on the cutter bodies protrude out of the spiral conveying bodies, gaps exist between the adjacent cutter bodies, and the spiral conveying bodies are sequentially spirally connected with the flexible shaft units to form continuous discharging channels.
According to the coal seam mining outburst elimination process, the cutter body comprises the left-handed section and the right-handed section which are opposite in spiral direction, the lengths of the left-handed section and the right-handed section are the same, the middle parts of the left-handed section and the right-handed section are butted together, and the outer ends of the left-handed section and the right-handed section are respectively sleeved in the supporting sleeves at the corresponding sides and are in transmission connection with the output rotating shaft.
The coal seam mining outburst elimination process comprises the walking driving mechanism, the driving motor and the driving box, wherein the driving motor is arranged on the walking platform, an output rotating shaft of the driving motor is in transmission connection with an input shaft of the driving box, and a driving shaft is arranged on the driving box; the slotting mechanism is a chain plate type circulating digging cutter, and the chain plate type circulating digging cutter comprises a chain plate, a shaft bracket, a main driving wheel, a secondary driving wheel and a digging cutter; the chain plate is sleeved on the main driving wheel and the auxiliary driving wheel, and a digging knife is arranged on the outer side of the chain plate.
In the coal seam mining outburst elimination process, the inner end of the shaft bracket is provided with the auxiliary travelling mechanism, and the auxiliary travelling mechanism comprises a hydraulic driving motor and a travelling shifting wheel; the hydraulic drive motor is arranged at the inner end of the shaft bracket and is close to the driven wheel, a rotating shaft is arranged at the eccentric position of the walking thumb wheel and is in transmission connection with the output shaft of the hydraulic drive motor, and the walking thumb wheel is positioned below the shaft bracket along with rotation energy.
According to the coal seam mining outburst elimination process, the walking shifting wheel comprises the rotating shaft, the upper eccentric wheel and the lower eccentric wheel, and the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft.
According to the coal seam mining outburst elimination process, the walking platform is provided with the walking crawler belt, the walking platform is provided with the supporting oil cylinder which is vertically arranged, the upper portion of the supporting oil cylinder is provided with the supporting seat, and the driving motor and the driving box are arranged on the supporting seat.
In the coal seam mining outburst elimination process, the inner end of the shaft bracket is provided with the top plate in an upward or downward extending mode, the top plate is close to the driven wheel, and the top plate is provided with the hydraulic ejector rod or the drill rod of the drilling machine.
According to the coal seam mining outburst elimination process, multiple layers of chain plate type circulating digging knives are arranged at intervals, the top plate is connected with the adjacent shaft brackets, and the driving end of the driving ejector rod is fixed on the top plate.
According to the coal seam mining outburst elimination process, the chain plate type circulating digging cutter is of a triangular structure, two main driving wheels and one auxiliary driving wheel are fixed on three supporting points of the shaft bracket, the two main driving wheels are in transmission connection with the two main driving shafts, one auxiliary driving wheel is located at the far end of the walking platform, the chain plate is sleeved on the main driving wheels and the auxiliary driving wheels, and the main driving wheels and the auxiliary driving wheels are belt wheels or gears.
According to the coal seam mining outburst elimination process, the chain plate type circulating digging knife spans across the coal seam, the two ends of the chain plate type circulating digging knife are provided with the traveling driving mechanisms, and the driven wheels are sleeved on the driving shafts on the corresponding sides.
According to the outburst elimination process for coal seam exploitation, the adjusting seat is sleeved at the inner end of the shaft bracket, the adjusting seat and the shaft bracket are provided with the adjusting rods, and the driven wheel is arranged on the adjusting seat.
The invention has the beneficial effects that:
1. according to the invention, seam cutting and outburst elimination equipment is assembled in the first roadway and/or the second roadway, seam cutting is carried out on the coal seam of the working face, so that continuous outburst elimination seams are formed, displacement and expansion deformation spaces can be created for coal bodies outside the seam, so that coal body cracks are increased, desorption and emission of gas are accelerated, pressure relief extraction of gas in the coal body of the mining section is realized, and the outburst elimination purpose is achieved. The method greatly improves the air permeability of the coal bed, is beneficial to quick release of gas, and can effectively reduce labor intensity and gas extraction period, reduce investment of manpower and financial resources and save cost compared with the traditional intensive drilling mode.
2. The process for eliminating the outburst needs to realize the purpose of slotting and eliminating the outburst through the travelling mechanism and the spiral cutter, and the travelling platform is arranged, so that the process can be used as an installation platform of equipment and can also be used for travelling in a pre-excavated roadway; the driving motor is used for driving the output rotating shaft to be connected with the output rotating shaft through a speed reducer. The reinforcing support frame and the support sleeve are used for stably supporting the spiral cutting knife, and the end part of the spiral cutting knife is in transmission connection with an output rotating shaft of the speed reducer through the support sleeve, so that the power transmission is ensured, and the stability of the power transmission is ensured; the supporting sleeve and the output rotating shaft are correspondingly arranged, so that the spiral cutting knife can continuously and stably rotate, the spiral cutting knife is used for penetrating into a coal layer, and along with the walking of the walking platform, the cutter blade on the side face of the spiral cutting knife is used for carrying out rotary cutting on a coal layer when rotating, and generated coal cinder is output to the outside of a cutting gap through a spiral discharging channel, so that the inside of the coal layer is transversely cut, the cutting gap with a certain thickness is generated, and the cut coal is sent out through a chain plate machine without influencing subsequent exploitation work.
3. The spiral cutting knife used in the invention can adopt a spiral cutting knife with a hard shaft, a combined hard shaft or a combined flexible shaft, wherein the hard shaft and the combined hard shaft are in a structure, a walking platform can be arranged on one side or two sides of the spiral cutting knife, the spiral cutting knife can be applicable to cutting coal seams in unilateral roadways or bilateral roadways, the two roadways can be combined through smaller shaft units, the spiral cutting knife can be installed in a mode of being combined one by one in a smaller space, and the spiral cutting knife is convenient to transport and drop into the roadway and is applicable to the situation that the cross range of the spiral cutting knife is larger.
The structure of the combined flexible shaft is more suitable for cutting coal beds in double-side roadways, and meanwhile, the combined flexible shaft has certain deformation capability, can be bent in the working process, and can be bent along a hard object to avoid damage if the combined flexible shaft is used for being bent in the hard object.
4. The cutter body of the spiral cutting cutter used in the invention is of a continuous or intermittent structure, the cutter body of the intermittent structure is independently arranged on the flexible shaft unit, and in order to enable the cut coal seam to be smoothly conveyed to the outside, a continuous spiral conveying body is arranged on the central flexible shaft to form a continuous discharging channel, the cutter body is used for cutting, the spiral conveying body is used for discharging cutting coal slag, and the coal slag is prevented from being detained in a cutting seam.
5. The invention adopts the slotting device of the chain plate type circulating digging blade, adopts the digging blade embedded on the circulating chain plate to discharge slotting coal dust to the two sides in a spiral way, improves the slotting efficiency and the discharge of the slotting coal dust, simultaneously greatly improves the air permeability of the coal bed, reduces the labor intensity and the gas extraction period of drilling construction, cuts a gap into the coal bed by adopting the way of the digging blade embedded on the circulating chain plate, and releases pressure and increases reflection to the coal bed.
6. The walking driving mechanism provided by the invention provides power for rotating and advancing the chain plate type circulating digging cutter from the outer side, namely in a roadway, namely, the driving motor and the driving box are used for providing rotating power, the chain plate type circulating digging cutter is driven to advance by the moving function of the walking platform, and the coal seam to be cut is cut to form a cutting seam in the coal seam to be cut.
7. According to the invention, different chain plate type circulating digging cutters can be selected to realize slotting according to a unilateral roadway and a bilateral roadway, and for the unilateral situation, a walking shifting wheel is arranged at a slave driving wheel in a coal seam, the walking shifting wheel is of an eccentric structure, can be actively driven to rotate, provides auxiliary walking power in the coal seam, and cooperates with a walking driving mechanism in the roadway to jointly finish the advancing power of the chain plate type circulating digging cutters; or a top plate is arranged at a position close to the driven wheel, and is provided with a driving ejector rod which has certain power and can drive the top plate to move forwards, so that power is formed from the inside of the driven wheel, and the driving ejector rod is matched with an external walking driving mechanism to realize the forward power of the chain plate type circulating digging cutter; for the double-side roadway, the chain plate type circulating digging cutter can be transversely crossed over the coal seam to be treated and connected with the two side synchronous walking and driving walking driving mechanisms, and the two side synchronous walking driving mechanisms provide forward walking and rotating power for the chain plate type circulating digging cutter.
Drawings
FIG. 1 is a schematic view of a seam cut in a coal seam according to the present invention
Fig. 2 is a schematic diagram of a seam cut in a coal seam according to the present invention.
Fig. 3 is a schematic view of the overall structure of the present invention using a helical cutter.
Fig. 4 is a schematic structural view of the reinforcing support frame.
Fig. 5 is a schematic structural view of the traveling driving mechanism.
Fig. 6 is a schematic structural view of a top stay and a top rod for a screw cutter.
Fig. 7 is a schematic structural view of the double-sided travel drive mechanism.
Fig. 8 is a schematic structural view of another embodiment of the central shaft.
Fig. 9 is a schematic structural diagram of an embodiment of a dual-row flexible shaft.
Fig. 10 is a schematic structural view of a double-discharging flexible shaft.
FIG. 11 is a schematic diagram of a usage process according to the present invention.
FIG. 12 is a schematic view of the overall slot and projection eliminating device using a link plate type circulating digging tool.
Fig. 13 is a schematic diagram of a walking driving structure of the present invention.
Fig. 14 is a schematic structural view of a link-type endless cutter.
Fig. 15 is a schematic view of an adjusting mode structure of the adjusting seat.
Fig. 16 is a second schematic structural diagram of an adjusting mode of the adjusting seat.
Fig. 17 is a schematic structural view of the auxiliary traveling mechanism.
Fig. 18 is a schematic view of the structure of the walking thumb wheel.
Fig. 19 is a schematic structural view of an active jack.
Fig. 20 is a schematic view of the structure of the top plate.
Fig. 21 is a structural view of an embodiment of a triangular link plate type endless cutter.
Fig. 22 is a schematic structural view of a double-sided travel drive of a slot and protrusion eliminating device of a link-plate type circulating digging tool.
Reference numerals in the drawings: the drilling machine comprises an upper rock layer 1, a lower rock layer 2, a coal layer 3, a roadway I4, a roadway II 5, a cutting seam 6, a walking platform 7, a driving motor 8, an output rotating shaft 9, a supporting sleeve 10, a reinforcing supporting frame 11, a spiral cutting knife 12, a central shaft 13, a knife body 14, a knife head 15, a flexible shaft unit 16, a universal joint 17, a driving shaft 18, a top supporting sleeve 19, a hydraulic top rod 20, a driving box 21, a chain plate type circular digging knife 22, a chain plate 23, a digging knife 24, a shaft bracket 25, a main driving wheel 26, a driven driving wheel 27, an adjusting seat 28, a guiding groove 29, an adjusting rod 30, a guiding shaft 31, a hydraulic driving motor 32, a walking driving wheel 33, a top plate 34 and a hydraulic top rod or a drilling machine drill rod 35.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Example 1: the embodiment provides a coal mining outburst elimination process, which is characterized by comprising the following steps of:
Firstly, constructing a working roadway along the depth at the position of a main roadway on a coal seam, and constructing a first roadway 4 and a second roadway 5 along the transverse direction at the left end and the right end of the working roadway;
then, constructing a primary cutting hole at the tail end of the first roadway and/or the second roadway to communicate the first roadway with the second roadway, wherein the primary cutting hole is the initial position of seam slotting;
and then, paving a working platform on the ground of the first roadway and/or the second roadway, arranging a chain plate machine on the ground in front of the working platform and the coal seam, and arranging a coal seam slotting and outburst eliminating device on the working platform. As shown in fig. 3, the seam slotting and outburst-eliminating device used in the embodiment comprises a walking driving mechanism and a spiral cutting knife 12, wherein the walking driving mechanism comprises a walking platform 7 and a driving mechanism, the walking platform 7 is used for walking in a roadway and is used as an installation platform of equipment, a driving motor (a hydraulic motor can also be used) 8 is installed on the walking platform 7, and the driving motor 8 is used for driving and connecting with an output rotating shaft 9 through a speed reducer by rotating power.
The spiral cutting knife 12 comprises a cylindrical central shaft 13 and a spiral knife body 14, the knife body 14 is arranged on the outer side of the central shaft 13, a spiral discharging channel is formed on the outer side of the central shaft 13, and raised knife heads 15 are arranged on the outer side of the knife body 14 at intervals; one end of the central shaft 13 is sleeved in the supporting sleeve 10 and is in transmission connection with the output rotating shaft 9 of the driving motor 8.
In this embodiment, as shown in fig. 3, the spiral cutting knife is suitable for a single roadway, the walking platform walks in the single-side roadway through the walking crawler and drives the spiral cutting knife to rotate and transversely translate, and as shown in fig. 4-5, a reinforcing support frame 11 is fixed on one side of the walking platform 7, a support sleeve 10 corresponding to the output rotating shaft 9 is arranged at the end of the reinforcing support frame 11, the inner end of the spiral cutting knife 12 is sleeved in the support sleeve 10 and is in transmission connection with the output rotating shaft 9, the outer end of the spiral cutting knife stretches into the coal seam, a support and stabilizing structure is arranged at the outer position of the spiral cutting knife, a support sleeve is arranged at the outer side of the output rotating shaft at a certain distance, the outer part of the spiral cutting knife is sleeved in the support sleeve and extends to the output rotating shaft to be in transmission connection with the output rotating shaft, the functions of positioning and stabilizing the spiral cutting knife are achieved, a horizontal section with a certain length at the output end of the spiral cutting knife is ensured, and the horizontal section is parallel to the output rotating shaft, and the output rotating shaft can stably output power.
In particular implementation, in order to realize the walking function, the walking track is arranged on the walking platform 7, the supporting cylinder is vertically arranged on the walking platform, the supporting seat is arranged on the upper portion of the supporting cylinder, the supporting cylinder is used for adjusting the height of the supporting seat, the spiral cutting knife 12 is matched with the height of a cutting seam, the driving motor 8 and the speed reducer are arranged on the supporting seat, the reinforcing support frame 11 is arranged on one side of the supporting seat, the end part of the reinforcing support frame 11 is provided with the supporting sleeve 10 corresponding to the output rotating shaft of the driving motor or the hydraulic motor, and the end part of the supporting plate is also provided with the operation workbench, and the intelligent display screen and the display instrument are arranged on the operation workbench.
The supporting seat for placing the driving motor or the hydraulic motor is liftable, the installation height of the spiral cutting knife can be adjusted adaptively through the function of the supporting seat, the height of the spiral cutting knife is matched with the height of the primary cutting hole, the use is convenient, and the functions are various.
As shown in fig. 5, the supporting sleeve 10 is a bearing or a shaft sleeve, the reinforcing supporting frame 11 comprises a horizontal fixing support and an inclined support which are integrally arranged, the horizontal fixing support is fixed on the supporting seat, the end part of the inclined support is provided with an outer sleeve, and the bearing or the shaft sleeve is sleeved on the outer sleeve and is provided with one or more groups.
When the coal seam cutting device is used, a through primary cutting hole is excavated in a coal seam to be cut, the spiral flexible shaft cutting knife 6 is placed in the primary cutting hole, the traveling driving mechanism is arranged in a roadway, two ends of the spiral flexible shaft cutting knife 6 are respectively connected to the output end of the traveling driving mechanism, the traveling platform is started to drive the spiral cutting knife to slowly travel forward, the spiral cutting knife is driven by the driving motor or the hydraulic motor to rotate in the traveling process, the spiral cutting knife is enabled to cut an inner area of the coal seam, the sawing thickness can be controlled to be about 200mm, the slotting thickness is not too large in implementation, coal and gas outburst accidents occur during slotting, then the produced coal seam is output into the roadway, the coal seam is enabled to generate a cutting seam with a certain thickness, and the gas in the coal seam is output and discharged by utilizing the cutting seam.
Example 2: the slotting process of this embodiment is the same as that of embodiment 1, and is not described herein, except that: the structure adopted in the slotting of the embodiment is different from that of the embodiment 1, and the embodiment is mainly suitable for the construction in a unilateral roadway, and a top support structure is arranged at the inner end of the spiral cutting knife. As shown in fig. 6, the other end of the spiral cutter 12 extends into the coal seam, a supporting sleeve 19 is rotatably arranged, the supporting rod 8 is positioned at the rear side of the spiral cutter, a rod body of the supporting sleeve is fixed at the outer side of the supporting sleeve, and a cylinder body of the supporting sleeve is fixed on the coal seam.
In the embodiment, the ejector rod is a hydraulic ejector rod 20, the rod body of the hydraulic ejector rod 20 is fixed at the outer side of the ejector sleeve 19, and the cylinder body of the hydraulic ejector rod 20 is fixed on a coal seam; and secondly, the hydraulic ejector rod provides forward thrust at the inner end of the spiral cutting knife, and the inner side and the outer side of the spiral cutting knife apply force synchronously, so that the stability of the spiral cutting knife in the process of cutting a coal seam is improved.
Example 3: this embodiment is substantially the same as embodiment 1, except that: the structure of the center shaft is further described in this embodiment.
The central shaft of the embodiment is a combined shaft, the central shaft 13 comprises a plurality of shaft units, independent cutter bodies are arranged on each shaft unit, the shaft units are connected in a butt joint mode, and adjacent cutter bodies are correspondingly connected together to form a spiral discharging channel.
During the concrete implementation, center pin 13 is assembled through a plurality of independent axle units and is formed, after just cutting the eye and forming, can be in the tunnel one by one and carry out the combination connection to spiral cutting knife, avoid when placing spiral cutting knife, the problem that the space is big is needed, axle unit is when the combination, each axle unit is circular shaft structure, one side tip is provided with the connector, opposite side tip is provided with the connecting hole, be provided with the heliciform cutter body of a cycle on an axle unit, thereby make the back that the combination finishes, the center pin outside forms the heliciform cutter body of a seal structure, the outside sets up the tool bit, utilize the tool bit to cut the coal seam, the confined screw channel carries out the discharge.
When the screw cutting knife is in rotation, the knife head collides with the coal seam, so that the connection strength of the connector and the connecting hole can be further increased; the pin holes and the pin shafts can be used according to the requirements, and after the screw thread assembly is completed, the pin fixing is carried out; the square shaft and the square hole can be inserted and fixed directly.
Example 4: this embodiment is substantially the same as embodiment 1, except that: the present embodiment is applicable to a double-sided roadway implementation.
As shown in fig. 7, two ends of the central shaft 13 of the present embodiment are provided with driving motors for driving the central shaft to rotate, the driving motors or hydraulic motors 8 on two sides are respectively fixed on the corresponding walking platforms 7 and rotate synchronously, and walk in the lanes on the corresponding sides, that is, the left driving walking mechanism and the right driving walking mechanism are respectively correspondingly arranged on the left side and the right side of the spiral cutting knife, the left driving walking mechanism and the right driving walking mechanism are respectively positioned in the lanes on the two sides, the double-row spiral cutting knife 6 is positioned in the coal seam, and two ends of the double-row spiral cutting knife penetrate through the coal seam and are in transmission connection with the left driving walking mechanism and the right driving walking mechanism positioned on the two sides.
Firstly, forming a through primary cutting hole in a coal bed, enabling a spiral cutting knife to cross the coal bed through the primary cutting hole, and then respectively connecting the spiral cutting knife with a driving motor or a hydraulic motor at the corresponding side, wherein the structure is driven at two sides and walks synchronously, so that the spiral cutting knife cuts the coal bed, and synchronous power is provided at two sides to cut the coal bed.
Example 5: this embodiment is substantially the same as embodiment 4 except that: the central axis of the embodiment is a flexible shaft.
As shown in fig. 11, the central shaft comprises a plurality of flexible shaft units 16, the flexible shaft units 16 are connected through universal joints 17 to form an integrated central flexible shaft, two ends of the central flexible shaft are sleeved in the supporting sleeve 10 and are in transmission connection with the output rotating shaft, the cutter body 14 is spirally arranged on the central flexible shaft, cutter heads 15 are arranged on the outer side faces of the cutter body 14 at intervals, the central flexible shaft has certain bending capacity, and is convenient to transport in a roadway and enter a cutting hole, and meanwhile, the spiral flexible shaft cutting knife can have certain deformation capacity, and can be allowed to bend in the working process, and can bend along a hard object when encountering hard objects and the like.
During concrete implementation, the central flexible shaft is spirally provided with a continuous spiral conveying body and intermittent cutter bodies, each flexible shaft unit is provided with an independent cutter body, cutter heads on the cutter bodies protrude out of the spiral conveying body, gaps exist between the adjacent cutter bodies, the spiral conveying bodies are sequentially and spirally connected with the flexible shaft units to form a continuous discharging channel, the intermittent cutter bodies and cutter heads on the outer sides of the intermittent cutter bodies cut coal seams, and the spiral conveying bodies continuously convey produced coal cinder, so that the coal cinder can be smoothly discharged and cut.
In this embodiment, the cutter body is a hard cutter body, the spiral conveying body is a spiral and continuous deformable material, at least the cutter head of the cutter body protrudes out of the spiral conveying body to cut the coal seam, and when in implementation, two ends of the central flexible shaft are connected with a driving shaft 18 through universal joints 17, the driving shaft 18 is sleeved in the supporting sleeve 10 and is in transmission connection with the output rotating shaft 9, the cutter body 14 is spirally arranged on the central flexible shaft, and cutter heads 15 are arranged on the outer side face of the cutter body 14 at intervals.
The central flexible shaft is in transmission connection with the output rotating shaft 9 through the driving shaft 18, the driving shaft 18 receives power provided by the speed reducer, and the driving shaft can be in a horizontal state under the action of the supporting sleeve 10, so that torque is prevented from being generated on the output rotating shaft, and the safety of driving equipment is improved.
The embodiment provides a spiral flexible shaft cutting knife 6 with bending deformation capability, the walking driving mechanism provides power for the rotation and forward pushing of the spiral flexible shaft cutting knife, and the deformation capability of the spiral flexible shaft cutting knife 6 can be adapted after contacting hard objects in the cutting process, so that rigid stress is avoided, and the spiral flexible shaft cutting knife is damaged.
Example 6: this embodiment is substantially the same as embodiment 1, except that: the structure of the cutter body is further described in this embodiment.
In the mode that all is provided with walking drive structure to spiral cut sword 12 both sides, walking platform walks in the tunnel of both sides, for convenient row material, this embodiment has set up the cutter body that can follow both sides synchronous row material, and the cutter body includes left-handed section and the right-handed section that two spiral opposite directions are in the specific structure, and left-handed section and right-handed section middle part butt joint are in the same place, and both outer ends suit respectively in the supporting sleeve of corresponding side to with output spindle transmission is connected, and the length of left row material cutter body and right row material cutter body is the same.
In the embodiment, the slit coal is discharged to two sides through the spiral blades, and the space between the first roadway and the second roadway can be transported out by using the chain plate machine automatically controlled in the first roadway and the second roadway, and the double-side spiral coal seam slit equipment is positioned outside the machine roadway duplex roadway. The coal sawing system space of the inner closed working face of the roadway I and the roadway II is arranged at the outer opening of the roadway I and the outer opening of the roadway II and at the joint inner side position; after the seam is cut, a space for displacement and expansion deformation is created for the coal outside the seam, so that the seam is increased, desorption and emission of gas are accelerated, the emitted gas enters roadway spaces such as a roadway I, a roadway II, a primary cutting hole and the like, high-concentration gas in the airtight roadway space is extracted by using a temporary gas extraction pipe arranged on the roadway II, pressure relief extraction of gas in the coal in the mining section is realized, and the purpose that the gas content of the outburst-eliminating coal seam is lower than the production reaching standard value is achieved.
Example 7: the embodiment is identical to the slotting process of the embodiments 1-6, but the adopted structure is different, specifically, as shown in fig. 12, the slotting and outburst elimination device used in the embodiment comprises a walking driving mechanism and a chain plate type circulating digging cutter 22, and the walking driving mechanism of the device walks in a unilateral roadway to cut a coal seam aiming at the unilateral roadway. The outer end of the chain plate type circulating digging cutter 22 is in transmission connection with the traveling driving mechanism, the main body of the chain plate type circulating digging cutter 22 penetrates into the coal layer, and the chain plate type circulating digging cutter 22 is driven by the traveling driving mechanism to gradually dig forward and output the generated coal slag into a roadway.
As shown in fig. 13, the traveling driving mechanism includes a traveling platform 7, a driving motor or hydraulic motor 8, and a driving case 21, the driving motor or hydraulic motor 8 is mounted on the traveling platform 7, an output rotation shaft thereof is in transmission connection with an input shaft of the driving case 21, and the driving case 21 is provided with a driving shaft 18.
In order to realize the walking function, the walking platform 7 in this embodiment is provided with a walking track, the walking platform 7 is provided with a support cylinder arranged vertically, the upper part of the support cylinder is provided with a support seat, and the hydraulic driving motor or the hydraulic motor 8 and the driving box 21 are arranged on the support seat.
In this embodiment, the height of the supporting seat is adjusted by using the supporting oil cylinder, the height of the chain plate type circulating digging cutter 22 is adaptively adjusted to be matched with the height of the cutting seam, first, a primary cutting hole is formed in the coal seam to be cut, the height of the driving shaft is matched with the middle of the primary cutting hole by adjusting the height of the supporting oil cylinder, and then the chain plate type circulating digging cutter is assembled on the driving shaft.
In the embodiment, the walking platform 7 is provided with a walking track, the walking track has a certain width, the walking process is stable, the walking platform 7 is provided with a support cylinder arranged vertically, the upper part of the support cylinder is provided with a support seat, and the cutting height can be adjusted through the support cylinder, so that the chain plate type circulating digging cutter 22 is matched with the height of the primary cutting channel.
In terms of transmission, in the embodiment, the driving motor 8 is in transmission connection with the driving box 21 through a speed reducer, the hydraulic driving motor or the hydraulic motor 8, the speed reducer and the driving box 21 are installed on a supporting seat, an operation workbench is further arranged at the end part of the supporting seat, and an intelligent display screen and an intelligent display instrument are arranged on the operation workbench.
The chain plate type circulating digging cutter 22 comprises a chain plate 23, a shaft bracket 25, a main driving wheel 26, a secondary driving wheel 27 and a digging cutter 24; wherein the shaft bracket 25 is fixed on the walking platform 7, the inner end and the outer end of the shaft bracket are respectively provided with a driven driving wheel 27 and a main driving wheel 26, the main driving wheel 26 is in transmission connection with the driving shaft 18, the chain plate 23 is sleeved on the main driving wheel 26 and the driven driving wheel 27, and the outer side of the chain plate is provided with a digging knife 24; during implementation, the support seat is provided with the outwards inclined reinforcing support, the reinforcing support is used for supporting the shaft bracket, and stability of the shaft bracket is improved.
The main driving wheel 26 and the auxiliary driving wheel 27 are pulleys or gears; the chain plate type circular digging knife 22 is in transmission connection with the driving wheel, and friction transmission or gear transmission can be adopted between the chain plate type circular digging knife and the driving wheel, namely, the belt wheel adopts friction transmission, and the gear adopts engagement transmission.
In this embodiment, the digging knife 24 is a right triangle protruding structure, its long right-angle side is fixed on the chain plate 23, its long right-angle side is a fixed part, its short right-angle side is a tunneling and conveying part, the digging knife is driven by the chain plate to continuously rotate, and the digging knife is utilized to dig the coal seam in the rotating process, the generated cinder is temporarily stored in the cavity formed between the short right-angle side of the digging knife and the bevel edge of the front end digging knife, and is conveyed out of the cutting seam along with the rotation of the chain plate.
According to the embodiment, a working face is formed by tunneling a coal seam, a working face is constructed at a certain distance outside a working face stoping line mainly aiming at a single working face roadway, a chain plate type circulating tunneling knife is utilized to cut the coal seam, the sawing thickness can be controlled to be about 200mm, the sawing thickness is not too large, coal and gas outburst accidents are prevented from occurring during sawing, a traveling crawler belt is mainly utilized to push forward, a driving motor or a hydraulic motor and a speed reducer drive a driving box, a main driving wheel rotates to drive a circulating chain plate, the tunneling knife inlaid on the chain plate is used for sawing a seam into the coal seam, forward tunneling is kept, the coal seam forms a space for creating displacement and expansion deformation for a coal body outside soft layering, so that coal body cracks are increased, desorption and emission of gas are accelerated, the gas emitted enters the working face roadway space, high-concentration gas in the sawing gap space is extracted by a temporarily arranged gas extraction pipe, and thus the purpose of gas reaching the standard of a gas bin after the relief treatment is achieved.
Example 8: this embodiment is substantially the same as embodiment 7 except that: in this embodiment, an adjusting structure is provided at the inner end of the axle bracket.
As shown in fig. 14-16, the inner end of the axle bracket 25 is provided with an adjustment seat 28, the adjustment seat 28 and the axle bracket 25 are provided with an adjustment lever 30, and the slave drive wheel 6 is provided on the adjustment seat 28.
The chain plate type circular digging cutter 22 is of an adjustable structure, and concretely comprises a driving end, a main driving wheel 26 is arranged at the outer end of a shaft bracket 25 and is in transmission connection with a driving shaft 18, an adjusting seat 28 is sleeved at the inner end of the shaft bracket 25 in a matched mode, the adjusting seat 28 can slide relative to the inner end of the shaft bracket, an adjusting rod 30 is arranged between the shaft bracket and the adjusting seat along the sliding direction, the adjusting rod 30 can adjust the length and can be locked at any adjusting position, the chain plate type circular digging cutter can be an electric push rod or a hydraulic push rod in specific implementation, the distance between the adjusting seat and the shaft bracket can be adjusted, and the chain plate type circular digging cutter further aims to adjust the length between the main driving wheel and the driven driving wheel, so that the tightness degree of a chain plate is adaptively adjusted, and the phenomenon of loosening during working of the chain plate type circular digging cutter is avoided.
In order to realize the relative sliding between the adjusting seat 28 and the shaft bracket 25, the end part of the shaft bracket 25 is provided with a guide groove 29, the bottom of the adjusting seat is provided with a guide block, the guide block is limited in the guide groove 29, and the guide block can slide relatively and can limit the position; the adjusting rod 9 is an electric push rod or a hydraulic push rod, the adjusting rod 9 can adjust the length and can be locked at any adjusting position, the tightness degree of the chain plate 23 is adaptively adjusted, and the loosening phenomenon of the chain plate type circular digging cutter during working is avoided.
The guide shaft 31 can be arranged at the inner end of the shaft bracket, the guide sleeve penetrating through the guide shaft 31 is arranged on the adjusting seat 28, the guide shaft is sleeved in the guide sleeve in a matched mode, the guide shaft is connected with the guide sleeve, the shaft bracket and the adjusting seat can slide relatively, the distance between the driving wheel and the driven wheel is adjusted through the adjusting rod, stable transmission is realized between the chain plate and the driving wheel, in a specific transmission mode, the main driving wheel 26 and the driven wheel 27 are belt wheels, the chain plate in the chain plate type circulating digging cutter is used as a part connected with the driving wheel in a transmission mode, friction transmission can be adopted between the chain plate and the driving wheel, and the friction between the chain plate type circulating digging cutter and the driving wheel can be adjusted through the adjusting rod, so that the chain plate type circulating digging cutter can bear larger cutting load.
Example 9: this embodiment is substantially the same as embodiment 7 except that: the embodiment is provided with an auxiliary travelling mechanism at the inner end.
As shown in fig. 17-18, an auxiliary travelling mechanism is provided at the inner end of the axle bracket 25, wherein the auxiliary travelling mechanism comprises a hydraulic drive motor or hydraulic motor 32 and a travelling thumb wheel 33; the hydraulic driving motor 32 is installed at the inner end of the shaft bracket 25, and is close to the driven wheel 27, a rotating shaft is arranged at the eccentric position of the walking thumb wheel 33, the rotating shaft is in transmission connection with the output shaft of the hydraulic driving motor or the hydraulic motor 32, and the walking thumb wheel is positioned below the shaft bracket along with rotation energy.
In order to reduce the load on the inside of the chain-plate type circulating digging cutter 22 when cutting the coal seam, the embodiment is provided with an auxiliary travelling mechanism at a position close to the driven wheel, namely, the inner end of the chain-plate type circulating digging cutter 22 is provided with an auxiliary travelling mechanism, and the outer end is provided with a travelling driving mechanism; when the chain plate type circulating digging cutter rotates, the walking shifting wheel can alternately shift the bottom foundation of the cutting seam, so that auxiliary power is generated at the inner end of the chain plate type circulating digging cutter, and the chain plate type circulating digging cutter is matched with a driving walking mechanism walking in an external roadway, so that the chain plate type circulating digging cutter can more forcefully cut a coal seam to be cut.
In specific implementation, the walking thumb wheel 33 comprises a rotating shaft, an upper eccentric wheel and a lower eccentric wheel, wherein the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft; in the embodiment, the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft, and in the structure, the two eccentric wheels with the same diameter are coaxially sleeved on the rotating shaft to form an up-down symmetrical structure, and the eccentric wheels can be contacted with the bottom of the cutting seam twice in each rotation, so that auxiliary power is generated.
Example 10: this embodiment is substantially the same as embodiment 7 except that: in the embodiment, the inner end of the chain plate type circulating digging knife is provided with active power.
As shown in fig. 19-20, the present embodiment is provided with a top plate 34 extending upward or downward at the inner end of the pedestal 25, the top plate 34 being adjacent to the slave drive wheel 27, and a hydraulic ram or drill pipe 35 being mounted on the top plate 34.
When the chain plate type circulating digging cutter 22 is implemented, a plurality of layers are arranged at intervals, the top plate 34 is connected with adjacent shaft brackets, the driving end of the hydraulic ejector rod or the drilling machine drill rod 35 is fixed on the top plate 34, the chain plate type circulating digging cutter is driven to advance by utilizing the moving function of the walking platform to cut a coal seam, the inside of the chain plate type circulating digging cutter is a driven end, the top plate is arranged on the inner end shaft bracket of the chain plate type circulating digging cutter, the hydraulic ejector rod or the drilling machine drill rod which is actively applied is arranged on the top plate, the fixed end of the hydraulic ejector rod or the drilling machine drill rod is in a fixed state, and can be propped against the seam wall of a cutting seam or fixed on a fixed seat, so that the pushing force matched with the walking driving mechanism is actively applied at the inner end of the chain plate type circulating digging cutter, and the chain plate type circulating digging cutter can be stabilized to cut the coal seam.
Example 11: this embodiment is substantially the same as embodiment 7 except that: the present embodiment further describes the shape of the link-type endless cutter 22.
As shown in fig. 21-22, the chain-plate type circulating digging cutter is in a triangular structure, two main driving wheels 26 and one auxiliary driving wheel 27 are fixed on three fulcrums of the shaft bracket 25, wherein the two main driving wheels 26 are in transmission connection with the two main driving shafts, the one auxiliary driving wheel 27 is positioned at the far end of the walking platform 7, and the chain plate 23 is sleeved on the main driving wheels 26 and the auxiliary driving wheel 27.
The driving mechanism is positioned in the roadway and can directionally walk in the roadway, the outer end of the triangular chain plate type circulating tunneling cutter is arranged on the driving mechanism, the inner end of the triangular chain plate type circulating tunneling cutter stretches into the coal seam to be cut, the triangular chain plate type circulating tunneling cutter can walk along with the driving mechanism and can be driven to rotate, and the triangular chain plate type circulating tunneling cutter can rotate when walking to cut the coal seam to be cut.
In a further development, two main driving wheels 26 and one auxiliary driving wheel 27 are distributed at three corners of the same right triangle, wherein the two main driving wheels 26 are distributed at the short right sides and the auxiliary driving wheels are smaller than the main driving wheels.
In this embodiment, two main drive wheels are connected as the output pivot transmission of power wheel and driving case simultaneously, and two main drive wheels distribute on short right angle limit, and one is located the distal end of walking platform from the drive wheel, utilizes long limit to extend in the coal seam, and the working face is long right angle limit, utilizes the inclined plane to prop, and triangle-shaped structure can bear great load, and stability is strong, work safety.
In the embodiment, a mode of cutting the coal seam to be cut by the triangular chain plate type circular tunneling cutting knife is adopted, a gap is cut into the coal seam, pressure relief and permeability increase are carried out on the coal seam, the slotting efficiency and the discharge of slotting coal dust are improved, meanwhile, the air permeability of the coal seam is greatly improved, the labor intensity of drilling construction and the gas extraction period are reduced, the triangular chain plate type circular tunneling cutting knife adopts triangular tension, the structure is stable and strong, and the underground construction safety is improved.
Example 12: this embodiment is substantially the same as embodiment 7 except that: the embodiment is provided with a double-side synchronous walking driving mechanism.
As shown in fig. 22, the chain-plate type circulating digging cutter spans the coal seam and is provided with a traveling driving mechanism at both ends thereof, and the driven wheels are sleeved on the driving shafts at the corresponding sides.
The embodiment is to pre-set two side tunnels, namely a tunnel I and a tunnel II, excavate a through rectangular primary cutting passage in a coal seam to be treated between the tunnel I and the tunnel II, put a chain plate type circulating digging cutter 22 into the primary cutting passage, then place a traveling driving mechanism in the tunnel I and the tunnel II, connect with the chain plate type circulating digging cutter, and synchronously operate the traveling driving mechanism during implementation to enable the chain plate type circulating digging cutter 22 to synchronously advance and rotate
According to the embodiment, the first roadway and the second roadway in the coal seam are utilized, the bedding drilling is not constructed, soft layering with a certain thickness in the coal seam is directly sawed by the synchronous walking chain plate type coal seam cutting device, the coal body in the whole coal layer in the working face range is mined, a cavity is formed, downward displacement and expansion deformation of the coal body at the top of the soft layering are caused, upward displacement and expansion deformation of the coal body at the bottom of the soft layering are caused, accordingly, the coal body which is not sawed in the coal seam is expanded integrally, cracks are increased, a gas release channel is increased, and a large amount of gas in the coal body is naturally discharged and treated under the influence of mining.
Claims (3)
1. A coal seam exploitation outburst elimination process is characterized in that: the method comprises the following steps:
firstly, constructing a working roadway along the depth at the position of a main roadway on a coal seam, and constructing a first roadway and a second roadway along the transverse direction at the left end and the right end of the working roadway;
then, constructing primary cutting holes at the tail ends of the first roadway and the second roadway to communicate the first roadway and the second roadway, wherein the primary cutting holes are initial positions of seam cutting;
then, paving a working platform on the ground of the first roadway and/or the second roadway, arranging a chain plate machine on the ground in front of the working platform and the coal seam, and arranging a coal seam slotting and outburst eliminating device on the working platform, wherein the coal seam slotting and outburst eliminating device comprises a traveling driving mechanism and a slotting mechanism, the slotting mechanism is connected with the traveling driving mechanism, the traveling driving mechanism is used for traveling on the working platform and advancing, and the slotting mechanism is arranged in an initial cutting hole communicated with the first roadway and the second roadway and can integrally cut the coal seam along with the traveling of the traveling driving mechanism to form a cutting seam; the walking driving mechanism comprises a walking platform, a driving motor or a hydraulic motor and a driving box, wherein a walking crawler belt is arranged on the walking platform, a supporting oil cylinder which is vertically arranged is arranged on the walking platform, a supporting seat is arranged on the upper part of the supporting oil cylinder, the driving motor or the hydraulic motor and the driving box are arranged on the supporting seat, an output rotating shaft of the driving motor or the hydraulic motor and the driving box is in transmission connection with an input shaft of the driving box, and a driving shaft is arranged on the driving box; the slotting mechanism is a chain plate type circulating digging cutter, and the chain plate type circulating digging cutter comprises a chain plate, a shaft bracket, a main driving wheel, a secondary driving wheel and a digging cutter; the shaft bracket is fixed on the walking platform, the inner end and the outer end of the shaft bracket are respectively provided with a driven wheel and a main driving wheel, the main driving wheels are in transmission connection with the driving shaft, the inner end of the shaft bracket is provided with an auxiliary walking mechanism, the auxiliary walking mechanism comprises a hydraulic driving motor or a hydraulic motor and a walking thumb wheel, the walking thumb wheel comprises a rotating shaft, an upper eccentric wheel and a lower eccentric wheel, and the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft; the hydraulic driving motor or the hydraulic motor is arranged at the inner end of the shaft bracket and is close to the driven driving wheel, a rotating shaft is arranged at the eccentric position of the walking shifting wheel and is in transmission connection with the output shaft of the hydraulic driving motor or the hydraulic motor, the walking shifting wheel can be positioned below the shaft bracket along with rotation, the chain plate is sleeved on the main driving wheel and the driven driving wheel, and a digging knife is arranged at the outer side of the chain plate.
2. The coal seam mining outburst elimination process according to claim 1, wherein: the chain plate type circulating digging cutters are provided with multiple layers at intervals, the top plates are connected with adjacent shaft brackets, the top plates are arranged at the inner ends of the shaft brackets in an upward or downward extending mode, the top plates are close to the driven wheels, the top plates are provided with hydraulic ejector rods, and the driving ends of the ejector rods are fixed on the top plates; the inner end of the shaft bracket is provided with an adjusting seat in a sleeved mode, the adjusting seat and the shaft bracket are provided with adjusting rods, and the driven wheel is arranged on the adjusting seat.
3. The coal seam mining outburst elimination process according to claim 1, wherein: the chain plate type circulating digging knife is of a triangular structure, two main driving wheels and one auxiliary driving wheel are fixed on three supporting points of the shaft bracket, the two main driving wheels are in transmission connection with the two main driving shafts, one auxiliary driving wheel is located at the far end of the walking platform, the chain plate is sleeved on the main driving wheels and the auxiliary driving wheels, and the main driving wheels and the auxiliary driving wheels are belt wheels or gears.
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