CN110388207A - Method microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column - Google Patents
Method microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column Download PDFInfo
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- CN110388207A CN110388207A CN201910642128.0A CN201910642128A CN110388207A CN 110388207 A CN110388207 A CN 110388207A CN 201910642128 A CN201910642128 A CN 201910642128A CN 110388207 A CN110388207 A CN 110388207A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005553 drilling Methods 0.000 claims abstract description 122
- 239000011435 rock Substances 0.000 claims abstract description 25
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/16—Other methods or devices for dislodging with or without loading by fire-setting or by similar methods based on a heat effect
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/18—Other methods or devices for dislodging with or without loading by electricity
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
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Abstract
The invention discloses a kind of methods microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column.Using microwave heating equipment, residual exploiting field leave the ground right above coal column drill through "Formula " drilling well, "Formula " drilling well be divided into "Formula " drilling well vertical section and "Formula " drilling well horizontal segment two parts, "Formula " drilling well vertical section pass through above cover coal seam thick and hard roof and on cover coal seam and reach residual exploiting field of underliing and leave in coal column, "Formula " drilling well horizontal segment covers parallel with advance of the face direction in the thick and hard roof of coal seam, a well double-purpose upper, to coal seam thick and hard roof is above covered and residual exploiting field of underliing leaves coal column and carries out presplitting, achievees the purpose that cutting down thick and hard roof and residual exploiting field leaves the compound strong mine pressure of coal column.The present invention makes full use of the features such as big high efficiency of microwave heating broken rock, energy density, wide adaptability, strong penetrability, realizes coal mine lasting exploit, safety in production.
Description
Technical field
The present invention relates to a kind of microwave heatingsMethod formula abatement thick and hard roof and leave the compound strong mine pressure of coal column, belongs to
Coal mining technology field.
Background technique
So-called Upward mining method first adopts to adopt after underliing coal seam and covers coal seam.When above covering seam mining, layer can be passed through
Between thick and hard roof and residual exploiting field of underliing leave coal column group, influenced coal work by compound strong mine pressure up and down.
Compound strong mine pressure is mainly derived from: (a) thick and hard roof: due to natural geological conditions, covering coal seam on many mining areas
The thick and hard roof that there are thickness is big, intensity is high, joint fissure agensis, integrality are good；(b) coal column is left in residual exploiting field: new China
The coal winning technology in initial stage of founding China falls behind relatively, for the safety in production of the stability, safeguard work face of guarantee country rock, can stay and set
Part pillar overlying rock；In the recovery process of modern high mechanization, by constructing and other mining conditions are limited,
Staying for part coal column is set unavoidably；When using barrier system coal-mining method, part coal column can leave and not adopt.This is resulted in coal seam
After exploitation, residual exploiting field, which has, largely leaves coal column.
When exploitation left by thick and hard roof and residual exploiting field of underliing that the compound strong mine pressure of coal column influences on cover coal seam when, can make
Strong at Face Ground Pressure Behavior, working face wall caving is serious, Floor Heave in Roadway, and goaf top plate is caving acutely and with loud noise, work
Make face poppet pressure to increase obviously, hydraulic support pushed down, the destruction of tunnel individual prop also happen occasionally, and stope thick and hard roof is first
Times/week phase water component also will increase, and gather a large amount of energy, when stope thick and hard roof suddenly across falling when, the energy of accumulation
Will abrupt release come out, to cause violent dynamic impact problem disaster, cause equipment damage, casualties seriously endangers mine
Well safety in production.
The prediction and preventing and controlling that compound strong mine pressure caused by coal column is left in thick and hard roof and residual exploiting field are more difficult, currently
For thick and hard roof and residual exploiting field leave coal column influence on cover the compound strong mine pressure of working face of coal seam control method have: it is a, passive
Control methods: (1) direction of extraction, the arrangement orientation of working face of coal seam adjustment in are covered, so that coal column is left in residual exploiting field of avoiding underliing
The concentrated stress zone of influence, but working face is still influenced by thick and hard roof pressure, is not tackled the problem at its root；(2) in reinforcement
The supporting of working face of coal seam is covered, but when Face Ground Pressure Behavior is strong, is difficult to by the technical measures of simple strengthening supporting
Guarantee safety in production, and support cost is high；(3) coal seam is covered on being left that coal column influenced by thick and hard roof and residual exploiting field to work
Face is also stayed and sets bigger coal column, but causes the significant wastage of coal resources；B, active control: (1) in thick and hard roof and residual
Exploiting field is left and carries out explosion in coal column, but construction work amount is big, poor controllability, is easy to cause gas particularly with highly gassy mine
Explosion, there are security risks；(2) coal column is left using hydrofracturing thick and hard roof and residual exploiting field, but consumes a large amount of water money
Source, and the chemical reagent during fracturing in high pressure fracture liquid is easy pollution subsurface environment.By the control of the above compound strong mine pressure
It is bad that method can be seen that passive control methods effect, does not solve the problems, such as really；Active control job location is mostly in working face
Or in tunnel, coal work is influenced, and fracturing thick and hard roof respectively and residual exploiting field is needed to leave coal column, complex steps.Cause
This, needs to find a kind of high-efficient, easy to control, good abatement thick and hard roof of effect and the compound strong mine pressure of coal column is left in residual exploiting field
Method carrys out the safety in production in safeguard work face.
When microwave (electromagnetic wave that frequency is 300MHz~300GHz) acts on rock mass, electromagnetic field is in the form of wave to rock
Body is converted with energy, energy further through the heat absorption of rock, so that interior of articles is generated similar friction, temperature increases, in rock mass
Generating in internal stress and rock mass leads to rock masses fracturing under the collective effects such as the evaporation of moisture, the decomposition of substance and expansion.It is micro-
The characteristics of Wave heating is high efficiency, energy density is big, it is strong etc. to be not required to medium heat-transfer, penetrability.It has been widely used at present
The fields such as oil/gas drilling, exploitation, Crude Oil Transportation, chemical industry, medical treatment.However the technology of compound strong mine pressure is cut down in microwave heating
Technical field of coal exploitation (especially microwave heating ground "It is compound strong that coal column is left in formula " abatement thick and hard roof and residual exploiting field
Mine pressure aspect) application it is seldom.
Summary of the invention
The present invention is intended to provide a kind of microwave heatingFormula abatement thick and hard roof and leave the compound strong mine pressure of coal column method and
Device, it is not only high-efficient, easy to control, effect is good, strong flexibility, it is dustless, without making an uproar, can be to avoid the disadvantage and not of preceding method
Enough, the features such as and making full use of the big high efficiency of microwave heating broken rock, energy density, wide adaptability, strong penetrability, on ground
Drill through "Formula " drilling well, a well double-purpose, to above cover coal seam thick and hard roof and residual exploiting field of underliing leave coal column carry out presplitting, reach and disappear
Subtract thick and hard roof and the purpose of the compound strong mine pressure of coal column is left in residual exploiting field, to realize coal mine lasting exploit, keeps the safety in production.
The process object that the present invention is directed to is: if working seam leaves coal column group by residual exploiting field of underliing and interlayer thickness is resisted stubbornly
Plate, and the coal column that residual exploiting field is left in coal column group is intricate, can select "It is thick to reach abatement from Ground Operation for formula " drilling well
It resists plate stubbornly and leaves the purpose of the compound strong mine pressure of coal column.
The present invention provides a kind of microwave heatingsMethod formula abatement thick and hard roof and leave the compound strong mine pressure of coal column, packet
Include following steps:
Step 1: microwave power controller is adopted with HIGH-POWERED MICROWAVES generator, temperature monitoring, data respectively by conducting wire
Collect instrument connection；HIGH-POWERED MICROWAVES generator is connected by circular waveguide, waveguide switch, coaxial waveguide and microwave emitter；Temperature
Degree monitor is connect by high temperature resistant wire with temperature sensor；By signal transmssion line by data collecting instrument, signal amplifier,
Demodulation probe is connected；It connects water tank, high-pressure pump, cooler, HIGH-POWERED MICROWAVES generator to form complete return by water pipe
Road, the cooling control valve control switch of microwave generator；And it is connected with ground power supply system；
Step 2: determining ground and above covering coal seam thick and hard roof, position and the distance relation of coal column are left in residual exploiting field of underliing,
Residual exploiting field leave the ground right above coal column drill through "Formula " drilling well, "Formula " drilling well number is L/d, and L is above to cover coal seam work
Make face length, d is wells spacing；"Formula " drilling well be divided into "Formula " drilling well vertical section and "Formula " drilling well horizontal segment two parts, "
Formula " drilling well vertical section pass through above cover coal seam thick and hard roof and on cover coal seam and reach residual exploiting field of underliing and leave in coal column, "Formula " is bored
Well horizontal segment it is upper cover it is parallel with advance of the face direction in the thick and hard roof of coal seam, and in the intersection of vertical section and horizontal segment
Directive wheel is installed, first "Formula " drilling well be known as "Formula " microwave heating fracturing drilling well, second "Formula " drilling well be known as "
Formula " detection drilling well；
Step 3: by coaxial waveguide, microwave emitter be arranged in that second step drills through "Formula " microwave heating fracturing drilling well is hung down
The innermost residual exploiting field of straight section is left in coal column, high temperature resistant wire, temperature sensor pass through "Formula " microwave heating fracturing drilling well is hung down
Straight section is arranged in above microwave emitter, at the same by signal transmssion line, demodulation probe be arranged in that second step drills through "Formula " detection
The bosom of drilling well vertical section；
Step 4: starting HIGH-POWERED MICROWAVES generator, microwave energy pass through circular waveguide, waveguide switch, coaxial waveguide
It is delivered to microwave emitter, the microwave action given off eventually by microwave emitter leaves coal column in residual exploiting field；Pass through simultaneously
Temperature monitoring check temperature sensor to "The prison of coal column is left in residual exploiting field near formula " microwave heating fracturing drilling well vertical section
It surveys, demodulation probe receives the signal of microwave emitter sending, passes to data acquisition by signal amplifier and signal transmssion line
Instrument, and analyze the reflection configuration delay time spread spectrum scenarios that receive, to herein "Formula " microwave heating fracturing drilling well is vertical
The section fracturing effect that nearby coal column is left in residual exploiting field is analyzed, and is operated microwave power controller so as to adjust microwave frequency and is added
Thermal power, microwave heating temperature, until "It leaves coal column and realizes cause in residual exploiting field in formula " microwave heating fracturing drilling well vertical section
It splits；Close HIGH-POWERED MICROWAVES generator；
Step 5: by coaxial waveguide, microwave emitter and high temperature resistant wire, temperature sensor from "Formula " microwave heating
Fracturing drilling well vertical section be arranged in through directive wheel "The bosom of formula " microwave heating fracturing drilling well horizontal segment, and synchronizing moving is believed
Number transmission line, demodulation probe to "The bosom of formula " detection drilling well horizontal segment repeats the 4th step, until herein "Formula " is micro-
Thick and hard roof near Wave heating fracturing drilling well horizontal segment realizes fracturing；Close HIGH-POWERED MICROWAVES generator；
Step 6: mobile coaxial waveguide, microwave emitter and high temperature resistant wire, temperature sensor "Formula " microwave adds
The thermotropic position for splitting drilling well horizontal segment, and synchronizing moving signal transmssion line, demodulation probe "The position of formula " detection drilling well horizontal segment
It sets, repeats the 4th step, until whole thick and hard roofs near microwave heating fracturing drilling well horizontal segment realize fracturing；It closes high-power
Microwave generator；
Step 7: recycling coaxial waveguide, microwave emitter, high temperature resistant wire, temperature sensor, signal transmssion line, detection
Probe, then opens the cooling control valve of microwave generator, and the water of water tank occurs by high-pressure pump, cooler, HIGH-POWERED MICROWAVES
Device returns to water tank, after cooling down to HIGH-POWERED MICROWAVES generator, closes the cooling control valve of microwave generator, finally seals
Stifled "Formula " microwave heating fracturing drilling well；
Step 8: will "Formula " detection drilling well as it is next "Formula " microwave heating fracturing drilling well, adjacent non-presplitting "
Formula " drilling well as it is next "Formula " detection drilling well repeats third step to the 7th step, until second step drill through it is all "Formula "
Thick and hard roof and residual exploiting field near drilling well leave the completion of coal column whole fracturing.
In above method second step, "The spacing d of formula " drilling well is 6~10 meters；"The diameter of formula " drilling well is doFor
155mm~335mm.
In above method second step, "The vertical section of formula " drilling well and the angle a range on ground are at 75 °~90 °.
In above method second step, "Formula " drilling well level section is located at the intersection of thick and hard roof and overlying rock.
In above method third step, temperature sensor 0.5~2m above microwave emitter.
In the 4th step of the above method, microwave heating power is 45kW~200kW；Microwave frequency is 815MHz~1015MHz.
In the 4th step of the above method, microwave heating temperature range is at 200 DEG C~800 DEG C.
In the 6th step of the above method, coaxial waveguide, microwave emitter and high temperature resistant wire, temperature sensor add in microwave
The thermotropic position for splitting drilling well horizontal segment is mobile primary every 6~10 meters.
The present invention provides a kind of microwave heatingsFormula abatement thick and hard roof and the device for leaving the compound strong mine pressure of coal column, are used
In the implementation above method, comprising: HIGH-POWERED MICROWAVES generator, microwave power controller, circular waveguide, waveguide switch, coaxially
Waveguide, microwave emitter, temperature monitoring, high temperature resistant wire, temperature sensor, data collecting instrument, signal amplifier, signal pass
Defeated line, demodulation probe, water tank, high-pressure pump, cooler, the cooling control valve of microwave generator；
HIGH-POWERED MICROWAVES generator is connected by circular waveguide, waveguide switch, coaxial waveguide and microwave emitter；Big function
Microwave energy is transported to microwave emitter by circular waveguide, waveguide switch, coaxial waveguide by rate microwave generator, by micro-
Wave launcher carries out fracturing to coal/rock mass；
Temperature monitoring is connect by high temperature resistant wire with temperature sensor；Temperature of the temperature sensor to neighbouring coal/rock mass
Degree is monitored, and temperature data is transferred to temperature monitoring by high temperature resistant wire；
Data collecting instrument, signal amplifier, demodulation probe are connected by signal transmssion line；Demodulation probe receive across
Coal/rock mass microwave signal, and Wave data is transferred to signal amplifier by signal transmssion line, signal amplifier is by waveform
After data amplify processing, it is finally transferred to data collecting instrument, obtained Wave data is analyzed, sentenced by data collecting instrument
The fracturing effect of disconnected coal/rock mass；
Microwave power controller is connected with HIGH-POWERED MICROWAVES generator, temperature monitoring, data collecting instrument respectively by conducting wire
It connects；Microwave power controller receives temperature monitoring and the obtained temperature data of data collecting instrument and waveform number by conducting wire
According to, and then HIGH-POWERED MICROWAVES generator is adjusted；
Water tank, high-pressure pump, cooler, HIGH-POWERED MICROWAVES generator connect to form complete loops by water pipe, microwave hair
The raw cooling control valve control switch of device；High-pressure pump by the water of water tank by water pipe again after cooler is cooling, be transported to big function
Rate microwave generator cools down to HIGH-POWERED MICROWAVES generator, and HIGH-POWERED MICROWAVES generator is avoided to overheat and be not available.
Beneficial effects of the present invention:
The present invention makes full use of that the high efficiency of microwave heating, energy density are big, the spies such as strong that are not required to medium heat-transfer, penetrability
Property, drill through on ground "Formula " drilling well, a well double-purpose, to above covering coal seam thick and hard roof and residual exploiting field leaves coal column and carries out presplitting,
Be not limited by a space, not under the influence of coal seam coal work, it is easy to operate, method is simple, it is dustless, without making an uproar.And microwave heating
Face "The method that the compound strong mine pressure of coal column is left in formula " abatement thick and hard roof and residual exploiting field is high-efficient, easy to control, effect is good, flexible
Property it is strong, reduce thick and hard roof and leave the integrality of coal column, reach abatement thick and hard roof and to leave coal column compound strong in residual exploiting field
The purpose of mine pressure is a kind of " extensive compared with existing abatement thick and hard roof and residual exploiting field leave the method for the compound strong mine pressure of coal column
Transformation of the formula " to " fine formula ", realizes coal mine lasting exploit, safety in production.
Detailed description of the invention
Fig. 1 be microwave heating ground "The device that the compound strong mine pressure of coal column is left in formula " abatement thick and hard roof and residual exploiting field shows
It is intended to；
Fig. 2 be microwave heating ground "Formula " abatement thick and hard roof and residual exploiting field leave the compound strong mine pressure of coal column "Formula "
Microwave heating fracturing drilling well working condition section schematic diagram；
Fig. 3 be microwave heating ground "Formula " abatement thick and hard roof and residual exploiting field leave the compound strong mine pressure of coal column "Formula "
Detection drilling well working condition section schematic diagram；
Fig. 4 microwave heating ground "Formula " abatement thick and hard roof and residual exploiting field leave the compound strong mine pressure of coal column "Formula " is bored
Well arranges stereoscopic schematic diagram.
In figure: 1-HIGH-POWERED MICROWAVES generator；2-microwave power controllers；3-circular waveguides；4-waveguide switch；
5-coaxial waveguides；6-microwave emitters；7-temperature monitorings；8-high temperature resistant wires；9-temperature sensors；10-data
Acquisition Instrument；11-signal amplifiers；12-signal transmssion lines；13-demodulation probes；14-water tanks；15-high-pressure pumps；16—
Cooler；17-water pipes；18-conducting wires；19-directive wheels；20—"Formula " microwave heating fracturing drilling well；201—"Formula " microwave
Heat fracturing drilling well vertical section；202—"Formula " microwave heating fracturing drilling well horizontal segment；21—"Formula " detection drilling well；211—"Formula " detection drilling well vertical section；212—"Formula " detection drilling well horizontal segment；22-above cover coal seam；Leave coal column in 23-residual exploiting fields；
24-above cover coal seam thick and hard roof；25-ground；26—"Formula " drilling well；26a—"Formula " drilling well vertical section；26b—"Formula "
Drilling well horizontal segment；D-wells spacing；Do-drilling well diameter；L-above covers working face of coal seam length；T1-microwave generator is cooling
Control valve.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiment.
Embodiment 1:
As shown in Figure 1, a kind of microwave heatingFormula abatement thick and hard roof and the device for leaving the compound strong mine pressure of coal column, comprising:
HIGH-POWERED MICROWAVES generator, microwave power controller, circular waveguide, waveguide switch, coaxial waveguide, microwave emitter, temperature
Monitor, high temperature resistant wire, temperature sensor, data collecting instrument, signal amplifier, signal transmssion line, demodulation probe, water storage
Tank, high-pressure pump, cooler, the cooling control valve of microwave generator；
HIGH-POWERED MICROWAVES generator 1 is connected by circular waveguide 3, waveguide switch 4, coaxial waveguide 5 and microwave emitter 6
It connects；Microwave energy is passed through circular waveguide 3, waveguide switch 4 by HIGH-POWERED MICROWAVES generator 1, and coaxial waveguide 5 is transported to microwave hair
Emitter 6, microwave emitter 6 are responsible for carrying out fracturing to coal/rock mass.
Temperature monitoring 7 is connect by high temperature resistant wire 8 with temperature sensor 9；Temperature sensor 9 be responsible for neighbouring coal/
The temperature of rock mass is monitored, and temperature data is transferred to temperature monitoring 7 by high temperature resistant wire 8.
Data collecting instrument 10, signal amplifier 11, demodulation probe 13 are connected by signal transmssion line 12；Demodulation probe
13, which are responsible for reception, is transferred to signal amplifier for Wave data across coal/rock mass microwave signal, and by signal transmssion line 12
11, after Wave data is amplified processing by signal amplifier 11, it is finally transferred to data collecting instrument 10, data collecting instrument 10 will
Obtained Wave data is analyzed, and judges coal/rock mass fracturing effect.
Microwave power controller 2 is acquired with HIGH-POWERED MICROWAVES generator 1, temperature monitoring 7, data respectively by conducting wire 18
Instrument 10 connects；Microwave power controller 2 receives temperature monitoring 7 and the obtained temperature number of data collecting instrument 10 by conducting wire 18
According to and Wave data, and then HIGH-POWERED MICROWAVES generator 1 is adjusted.
Water tank 14, high-pressure pump 15, cooler 16, the connection of HIGH-POWERED MICROWAVES generator 1 are formed completely by water pipe 17
Circuit, the cooling control valve T of microwave generator1Control switch；High-pressure pump is cooling through cooler again by water pipe by the water of water tank
Afterwards, it is transported to HIGH-POWERED MICROWAVES generator, is cooled down to HIGH-POWERED MICROWAVES generator, HIGH-POWERED MICROWAVES generator mistake is avoided
Heat, and be not available.
As shown in figs. 2 to 4, above cover coal seam 22 exploit when, will receive residual exploiting field of underliing leave coal column 23 and on cover coal seam thickness
Resist the influence of the compound strong mine pressure of plate 24 stubbornly, specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
A kind of microwave heating ground "The method that the compound strong mine pressure of coal column is left in formula " abatement thick and hard roof and residual exploiting field, tool
Body the following steps are included:
Step 1: microwave power controller 2 by conducting wire 18 respectively with HIGH-POWERED MICROWAVES generator 1, temperature monitoring 7,
Data collecting instrument connection 10；HIGH-POWERED MICROWAVES generator 1 passes through 3-waveguide switch of circular waveguide, 4-coaxial waveguide 5 and microwave
Transmitter 6 connects；Temperature monitoring 7 is connect by high temperature resistant wire 8 with temperature sensor 9；It will be counted by signal transmssion line 12
It is connected according to 10-signal amplifier of Acquisition Instrument, 11-demodulation probe 13；It is by water pipe 17 that 14-high-pressure pump of water tank 15-is cold
But the connection of 16-HIGH-POWERED MICROWAVES of device generator 1 forms complete loops, the cooling control valve control switch of microwave generator；And with ground
Face power supply system is connected；
Step 2: determine ground 25 and above cover coal seam thick and hard roof 24, residual exploiting field of underliing leave coal column 23 position and away from
From relationship, residual exploiting field leave the ground 25 right above coal column 23 drill through "Formula " drilling well 26, "26 numbers of formula " drilling well are L/d
A (L is the working face of coal seam length that underlies, and d is wells spacing), "The spacing d of formula " drilling well 26 is 8 meters；"Formula " drilling well 26
It is 285mm that diameter, which is do, "Formula " drilling well 26 divide for "Formula " drilling well vertical section 26a and "Formula " drilling well horizontal segment 26b two parts,
“Formula " the drilling well vertical section 26a and angle a on ground is 90 °, "Formula " drilling well vertical section 26a, which is passed through, above covers coal seam thick and hard roof
24 and on cover coal seam 22 and reach residual exploiting field of underliing and leave in coal column 23, "Formula " drilling well horizontal segment 26b, which is located at, above to be covered coal seam thickness and resists stubbornly
The intersection of plate 24 and overlying rock, it is parallel with 22 advance of the face direction of coal seam is above covered, and "Formula " drilling well vertical section
26a and "The intersection of formula " drilling well horizontal segment 26b is equipped with directive wheel 19, first "Formula " drilling well 26 be known as "Formula " microwave
Heating fracturing drilling well 20, second "Formula " drilling well 26 be known as "Formula " detection drilling well 21；
Step 3: by coaxial waveguide 5, microwave emitter 6, be arranged in that second step drills through "Formula " microwave heating fracturing is bored
The innermost residual exploiting field of well vertical section 201 is left in coal column 23, high temperature resistant wire 8, temperature sensor 9 pass through "Formula " microwave adds
The thermotropic drilling well vertical section 201 that splits is arranged in 61 meter of top of microwave emitter, while signal transmssion line 12, demodulation probe 13 being arranged
Second step drill through "The bosom of formula " detection drilling well vertical section 211；
Step 4: starting HIGH-POWERED MICROWAVES generator 1, microwave energy are coaxial by 3-waveguide switch of circular waveguide 4-
Waveguide 5 is delivered to microwave emitter 6, and the microwave (frequency 915MHz) given off eventually by microwave emitter 6 acts on residual
Leave coal column 23 in exploiting field；Simultaneously by temperature monitoring 7 check temperature sensor 9 to "Formula " microwave heating fracturing drilling well is vertical
Section 201 nearby leaves the monitoring of coal column, and demodulation probe 13 receives the signal of the sending of microwave emitter 6, passes through signal amplifier
11-signal transmssion lines 12 pass to data collecting instrument 10, and analyze the reflection configuration delay time spread spectrum scenarios received, to this
Place "The fracturing effect that formula " microwave heating fracturing drilling well vertical section 201 nearby leaves coal column is analyzed, and microwave power is operated
Controller 2 so as to adjust 915MHz (± 100MHz) and heating power (80kW~150kW), microwave heating temperature (400 DEG C~
700 DEG C), until "It leaves coal column 23 and realizes fracturing in the residual exploiting field of formula " microwave heating fracturing drilling well vertical section 201；
Step 5: close HIGH-POWERED MICROWAVES generator 1, by coaxial waveguide 5, microwave emitter 6 and high temperature resistant wire 8,
Temperature sensor 9 from "Formula " microwave heating fracturing drilling well vertical section 201 be arranged in through directive wheel 19 "Formula " microwave heating fracturing
The bosom of drilling well horizontal segment 202, and synchronizing moving signal transmssion line 12, demodulation probe 13 to "Formula " detection drilling well horizontal segment
202 bosom repeats the 4th step, until herein "Thick and hard roof near formula " microwave heating fracturing drilling well horizontal segment 202
Realize fracturing；
Step 6: close HIGH-POWERED MICROWAVES generator 1, by coaxial waveguide 5, microwave emitter 6 and high temperature resistant wire 8,
Temperature sensor 9 "Formula " microwave heating fracturing drilling well horizontal segment 202 moves backward 6 meters, and synchronizing moving signal transmssion line
12, demodulation probe 13 "The position of formula " detection drilling well horizontal segment 212 repeats the 4th step, until the drilling well of microwave heating fracturing
Whole thick and hard roofs near horizontal segment realize fracturing；
Step 7: closing HIGH-POWERED MICROWAVES generator 1, coaxial waveguide 5, microwave emitter 6, high temperature resistant wire 8, temperature are recycled
Sensor 9 is spent, then signal transmssion line 12, demodulation probe 13 open the cooling control valve of microwave generator, the water warp of water tank 14
It crosses high-pressure pump 15-cooler, 16-HIGH-POWERED MICROWAVES generator 1 and returns to water tank 14, HIGH-POWERED MICROWAVES generator 1 is carried out cold
But after cooling down, the cooling control valve of microwave generator is closed, finally block "Formula " microwave heating fracturing drilling well 20；
Step 8: will "Formula " detection drilling well 21 as it is next "Formula " microwave heating fracturing drilling well 20, adjacent is not pre-
Split "Formula " drilling well as it is next "Formula " detection drilling well 21 repeats third step to the 7th step, up to what second step drilled through owns
“Thick and hard roof 24 and residual exploiting field near formula " drilling well 26 are left the whole fracturings of coal column 23 and are completed；
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in skill of the invention
Art essence and principle within, any modification, equivalent replacement, improvement and so on, should be included in protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of method microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, it is characterised in that: be used for: exploitation
Coal column group and interlayer thick and hard roof and the intricate situation of coal column are left by residual exploiting field of underliing in coal seam, comprising the following steps:
Step 1: microwave power controller by conducting wire respectively with HIGH-POWERED MICROWAVES generator, temperature monitoring, data collecting instrument
Connection；HIGH-POWERED MICROWAVES generator is connected by circular waveguide, waveguide switch, coaxial waveguide and microwave emitter；Temperature prison
Device is surveyed to connect by high temperature resistant wire with temperature sensor；By signal transmssion line by data collecting instrument, signal amplifier, detection
Probe is connected；It connects water tank, high-pressure pump, cooler, HIGH-POWERED MICROWAVES generator to form complete loops by water pipe, it is micro-
Wave producer cools down control valve control switch；And it is connected with ground power supply system；
Step 2: determining ground and above covering coal seam thick and hard roof, position and the distance relation of coal column are left in residual exploiting field of underliing, residual
Exploiting field leave the ground right above coal column drill through "Formula " drilling well, "Formula " drilling well number is L/d, and L is above to cover working face of coal seam
Length, d are wells spacing；"Formula " drilling well be divided into "Formula " drilling well vertical section and "Formula " drilling well horizontal segment two parts, "Formula " is bored
Well vertical section pass through above cover coal seam thick and hard roof and on cover coal seam and reach residual exploiting field of underliing and leave in coal column, "Formula " drilling well is horizontal
Section is covered parallel with advance of the face direction in the thick and hard roof of coal seam upper, and is equipped in the intersection of vertical section and horizontal segment
Directive wheel, first "Formula " drilling well be known as "Formula " microwave heating fracturing drilling well, second "Formula " drilling well be known as "Formula " detection
Drilling well；
Step 3: by coaxial waveguide, microwave emitter be arranged in that second step drills through "Formula " microwave heating fracturing drilling well vertical section
Innermost residual exploiting field is left in coal column, high temperature resistant wire, temperature sensor pass through "Formula " microwave heating fracturing drilling well vertical section
Be arranged in above microwave emitter, at the same by signal transmssion line, demodulation probe be arranged in that second step drills through "Formula " detection drilling well
The bosom of vertical section；
Step 4: starting HIGH-POWERED MICROWAVES generator, microwave energy passes through circular waveguide, waveguide switch, coaxial waveguide conveying
To microwave emitter, the microwave action given off eventually by microwave emitter leaves coal column in residual exploiting field；Pass through temperature simultaneously
Monitor check temperature sensor to "The monitoring of coal column is left in residual exploiting field near formula " microwave heating fracturing drilling well vertical section, inspection
Wave probe receives the signal of microwave emitter sending, passes to data collecting instrument by signal amplifier and signal transmssion line, and
Analyze the reflection configuration delay time spread spectrum scenarios that receive, to herein "Near formula " microwave heating fracturing drilling well vertical section
The fracturing effect that coal column is left in residual exploiting field is analyzed, and operates microwave power controller so as to adjust microwave frequency and heating function
Rate, microwave heating temperature, until "It leaves coal column and realizes fracturing in residual exploiting field in formula " microwave heating fracturing drilling well vertical section；It closes
Close HIGH-POWERED MICROWAVES generator；
Step 5: by coaxial waveguide, microwave emitter and high temperature resistant wire, temperature sensor from "Formula " microwave heating fracturing
Drilling well vertical section be arranged in through directive wheel "The bosom of formula " microwave heating fracturing drilling well horizontal segment, and synchronizing moving signal passes
Defeated line, demodulation probe to "The bosom of formula " detection drilling well horizontal segment repeats the 4th step, until herein "Formula " microwave heating
Thick and hard roof near fracturing drilling well horizontal segment realizes fracturing；Close HIGH-POWERED MICROWAVES generator；
Step 6: mobile coaxial waveguide, microwave emitter and high temperature resistant wire, temperature sensor "Formula " microwave heating causes
Split the position of drilling well horizontal segment, and synchronizing moving signal transmssion line, demodulation probe "The position of formula " detection drilling well horizontal segment,
The 4th step is repeated, until whole thick and hard roofs near microwave heating fracturing drilling well horizontal segment realize fracturing；It closes high-power micro-
Wave producer；
Step 7: recycling coaxial waveguide, microwave emitter, high temperature resistant wire, temperature sensor, signal transmssion line, demodulation probe,
Then the cooling control valve of microwave generator is opened, the water of water tank is returned to by high-pressure pump, cooler, HIGH-POWERED MICROWAVES generator
Water tank after cooling down to HIGH-POWERED MICROWAVES generator, closes the cooling control valve of microwave generator, finally block "
Formula " microwave heating fracturing drilling well；
Step 8: will "Formula " detection drilling well as it is next "Formula " microwave heating fracturing drilling well, adjacent non-presplitting "Formula " is bored
Well as it is next "Formula " detection drilling well repeats third step to the 7th step, until second step drill through it is all "Formula " drilling well is attached
The completion of coal column whole fracturing is left in close thick and hard roof and residual exploiting field.
2. the method according to claim 1 microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, special
Sign is: in second step, "The spacing d of formula " drilling well is 6~10 meters；"The diameter of formula " drilling well is doFor 155mm~335mm.
3. the method according to claim 1 microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, special
Sign is: in second step, "The vertical section of formula " drilling well and the angle a range on ground are at 75 °~90 °.
4. the method according to claim 1 microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, special
Sign is: in second step, "Formula " drilling well level section is located at the intersection of thick and hard roof and overlying rock.
5. the method according to claim 1 microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, special
Sign is: in third step, temperature sensor 0.5~2m above microwave emitter.
6. the method according to claim 1 microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, special
Sign is: in the 4th step, microwave heating power is 45kW~200kW；Microwave frequency is 815MHz~1015MHz.
7. the method according to claim 1 microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, special
Sign is: in the 4th step, microwave heating temperature range is at 200 DEG C~800 DEG C.
8. the method according to claim 1 microwave heating abatement thick and hard roof and leave the compound strong mine pressure of coal column, special
Sign is: in the 6th step, coaxial waveguide, microwave emitter and high temperature resistant wire, temperature sensor are bored in microwave heating fracturing
The position of well horizontal segment is mobile primary every 6~10 meters.
9. a kind of microwave heating abatement thick and hard roof and the device for leaving the compound strong mine pressure of coal column, for implementing claim 1~8
Described in any item microwave heatingsMethod formula abatement thick and hard roof and leave the compound strong mine pressure of coal column, it is characterised in that: packet
It includes: HIGH-POWERED MICROWAVES generator, microwave power controller, circular waveguide, waveguide switch, coaxial waveguide, microwave emitter, temperature
Spend monitor, high temperature resistant wire, temperature sensor, data collecting instrument, signal amplifier, signal transmssion line, demodulation probe, water storage
Tank, high-pressure pump, cooler, the cooling control valve of microwave generator；
HIGH-POWERED MICROWAVES generator is connected by circular waveguide, waveguide switch, coaxial waveguide and microwave emitter；It is high-power micro-
Microwave energy is transported to microwave emitter by circular waveguide, waveguide switch, coaxial waveguide by wave producer, is sent out by microwave
Emitter carries out fracturing to coal/rock mass；
Temperature monitoring is connect by high temperature resistant wire with temperature sensor；Temperature sensor to the temperature of neighbouring coal/rock mass into
Row monitoring, and temperature data is transferred to by temperature monitoring by high temperature resistant wire；
Data collecting instrument, signal amplifier, demodulation probe are connected by signal transmssion line；Demodulation probe is received across coal/rock
The microwave signal of body, and Wave data is transferred to signal amplifier by signal transmssion line, signal amplifier is by Wave data
After amplifying processing, it is finally transferred to data collecting instrument, data collecting instrument analyzes obtained Wave data, judgement
Coal/rock mass fracturing effect；
Microwave power controller is connect with HIGH-POWERED MICROWAVES generator, temperature monitoring, data collecting instrument respectively by conducting wire；It is micro-
Wave power controller receives temperature monitoring and the obtained temperature data of data collecting instrument and Wave data by conducting wire, in turn
HIGH-POWERED MICROWAVES generator is adjusted；
Water tank, high-pressure pump, cooler, HIGH-POWERED MICROWAVES generator connect to form complete loops by water pipe, microwave generator
Cooling control valve control switch；High-pressure pump by the water of water tank by water pipe again after cooler is cooling, be transported to high-power micro-
Wave producer cools down to HIGH-POWERED MICROWAVES generator, and HIGH-POWERED MICROWAVES generator is avoided to overheat and be not available.
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| CN110836113A (en) * | 2019-11-14 | 2020-02-25 | 中国矿业大学 | Method for improving top coal caving performance of fully mechanized caving face by using controllable source microwave radiation |
| CN113107583A (en) * | 2021-05-21 | 2021-07-13 | 中国矿业大学 | Thick and hard roof high-gas coal seam gas extraction system and extraction method |
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| CN110388207B (en) | 2020-11-03 |
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