CN105401976A - Outburst prevention measure in wire saw joint-cutting region of coal seam floor - Google Patents
Outburst prevention measure in wire saw joint-cutting region of coal seam floor Download PDFInfo
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- CN105401976A CN105401976A CN201511026615.2A CN201511026615A CN105401976A CN 105401976 A CN105401976 A CN 105401976A CN 201511026615 A CN201511026615 A CN 201511026615A CN 105401976 A CN105401976 A CN 105401976A
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- rope
- directional drilling
- seam
- winch
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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 discloses an outburst prevention measure in the wire saw joint-cutting region of a coal seam floor. The measure comprises the steps of 1, ascertaining the occurrence status of a coal seam; 2, respectively digging two cross holes in the coal seam via two drainage lanes different in elevation and arranged up and down, so as to form four mutually parallel and squarely arranged cross holes; 3, conducting the directional drilling operation by a directional drilling machine to communicate every twp adjacent cross holes, and communicating the end moraines of the four cross holes to form a quadrangular channel by four directional drilled holes; 4, guiding wire saws to be located inside the directional drilled holes during the retreating process of the above directional drilling machine after the directional drilling operation and finally connecting the wire saws inside the four directional drilled holes in the series connection manner; 5, installing a wire saw kerf winch on the end moraine of one cross hole at the lower elevation, driving the serially connected wire saws by means of the wire saw kerf winch, and continuously tightening a cutting rope to conduct the lancing operation. The above measure is small in construction workload, short in time duration, low in cost and good in outburst prevention effect.
Description
Technical field
The invention belongs to the technical field of control coal and gas prominent region outburst prevention measures, particularly relate to a kind of seat earth rope sawing seam region outburst prevention measures.
Background technology
At present, have exploitation topping and region to take out coal-bed gas 2 class in advance for the region outburst prevention measures taked of control coal and gas prominent both at home and abroad, and to exploit topping be most effective measures.But; exploitation topping cost is high, the time is long; moreover most topping itself also has outburst hazard; also region outburst prevention measures must be implemented; once topping gas control weak effect, time are long; by the whole colliery of impact safely, take over deployments, benefit, thus exploiting topping is also the overall bottleneck of restriction.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of seat earth rope sawing is provided to stitch region outburst prevention measures, this method adopts rope saw to cut out at seat earth the crack that is parallel to coal seam, impel coal seam pressure relief, reach the object eliminating outburst danger, construction volume is less, and the time is shorter, cost is lower, and protrusion-dispelling effect is better.
The object of the present invention is achieved like this:
A kind of seat earth rope sawing seam region outburst prevention measures, the method is carried out according to the following steps:
Step 1. verifies ocurrence of coal seam situation
Implement geology inspecting hole in extraction lane to coal seam, verify ocurrence of coal seam situation;
Step 2. crosscutting
Two crossdrifts are tunneled respectively to coal seam in two extraction lanes of upper and lower different level, formed and be parallel to each other and four crossdrifts arranged in quadrangle, crossdrift stops head near seat earth, and supporting is intact, and crossdrift moraine head and seat earth normal distance require to meet coal seam dilatancy and determine;
Step 3. is constructed directional drilling
Implement directional drilling with directional drilling machine, by through for adjacent two crossdrifts, the moraine head of four crossdrifts is communicated with by four directional drillings, forms quadrangle passage, and directional drilling and seat earth normal distance are determined to meet coal seam dilatancy and require;
Step 4. settles rope saw
The directional drilling machine strop saw when moving back brill completing directional drilling is placed in corresponding directional drilling, is finally together in series by the rope saw in four directional drillings;
Step 5. implements joint-cutting operation
At one of them crossdrift moraine head installing rope sawing seam winch of lower absolute altitude, utilize rope sawing seam winch to drive the rope saw be together in series, carry out joint-cutting operation, in joint-cutting operation process, constantly tightening up cutting rope, to directly completing joint-cutting, forming the joint-cutting adjacent with coal seam.
Further, in step 1, after geology inspecting hole, draw coal seam floor contour map, establishment geologic report, for crosscutting and construction directional drilling provide underlying parameter.
Further, in step 3, after construction directional drilling, repeatedly clean boring, to reduce mud and sand silting.
Further, in step 4, when arrangement rope saw, utilize directional drilling machine to guide simultaneously and guiding wirerope is installed, again to settle the guide rope of rope saw after so rupturing as later stage rope serrula.
In order to make rope saw from one-sided joint-cutting, reducing rope saw friction area, reducing joint-cutting difficulty, preferably, in step 4, at one of them crossdrift moraine head installing rope saw leading block of upper absolute altitude, the crossdrift moraine head that winch is stitched in this crossdrift moraine head and installing rope sawing is positioned at homonymy.
In order to discharge a small amount of gas in quadrangle passage, preferably, in step 5, booster is adopted to ventilate to quadrangle passage.
Further, in step 5, arranging the cooling fluid for cooling rope saw in the rope-in end of rope sawing seam winch, spraying cooling deslagging water in the rope-in end of each directional drilling.Make directional drilling rope-out end deslagging more unobstructed, rope saw keeps low temperature cutting, prevents the overheated fusing of rope saw.
In order to cinch cord is sawed gradually, and synchronously complete the recovery of rope saw, increase work efficiency, further, in step 5, along with the increase gradually of joint-cutting area, unnecessary rope saw reclaims immediately, reclaiming rope saw adopts orbit determination movable pulley mechanism to coordinate pulling winch to complete: the track arranging movable pulley mechanism in the crossdrift of installing rope sawing seam winch, movable pulley mechanism is arranged on the front end of this track, the pulley connection cord saw of movable pulley mechanism, movable pulley mechanism is drawn with pulling winch, when movable pulley is drawn to tail track, suspend joint-cutting operation and manually unload rope recovery rope saw, then movable pulley is moved on to track front end and connect the operation of rope saw recovery joint-cutting, rope sawing seam winch and pulling winch synchronous interaction.
In order to find most suitable joint-cutting area, further, in step 2, the spacing between each crossdrift is determined according to the tractive force size of rope sawing seam winch and pulling winch.
In order to ensure protrusion-dispelling effect, prevent security risk, further, also comprise step 6. effect expedition, investigate joint-cutting region protrusion-dispelling effect by coal seam dilatancy amount and gas remainder quantity: after joint-cutting completes, arrange firedamp taking-out discharging drilling, investigate coal seam dilatancy amount, after mash gas extraction decay, adopt the mode of region measure effect inspection to extract coal sample and carry out gas remainder quantity mensuration.
Owing to have employed technique scheme, the present invention has following beneficial effect:
1. this method rope sawing coal cutting layer base plate vicinity rock stratum, forms a crack parallel with coal seam, impels coal seam to be subjected to displacement distortion to fractuer direction; thus increase coal seam porosity; improve Permeability Coefficent in Coal Seam, make the progressively desorb of coal seam adsorption gas, reach the effect of exploitation topping.
2. extraction lane is the tunnel that underground coal mine must be constructed, and implementing the operation of rope sawing seam is arrange four little crossdrifts in existing extraction lane, and roadway engineering amount is about 100m, and tunnel initating investment is little.
3. in operation process, rope saw moves to rope sawing seam winch capacity direction (roughly along directional drilling); coal seam can not be contacted; so can not give prominence to, the gas amount gushed out also can not be very large, after becoming seam; coal seam under the effect of geostatic stress and gas stress to fractuer direction displacement deformation; make the dilatancy amount in coal seam reach 3 ‰, reach the effect of exploitation topping, without coal and gas prominent security risk; safe and reliable, the time of administering is controlled.
Accompanying drawing explanation
Fig. 1 is rope sawing seam elevational schematic view;
Fig. 2 is rope sawing seam generalized section.
Reference numeral
In accompanying drawing, 1 is upper absolute altitude extraction lane, and 2 is lower absolute altitude extraction lane, and 3 is directional drilling, and 4 is diamond rope saw, and 5 is crossdrift, and 6 is leading block, and 7 is rope sawing seam winch, and 8 is coal seam, and 9 is movable pulley mechanism, and 10 is pulling winch, and 11 is seat earth.
Detailed description of the invention
Embodiment
A kind of seat earth rope sawing seam region outburst prevention measures, the equipment of employing comprises 500m directional drilling machine and corollary equipment, diamond rope saw, endless rope winch etc.
Step 1. verifies ocurrence of coal seam situation
Implement geology inspecting hole in extraction lane to coal seam, verify ocurrence of coal seam situation, draw coal seam floor contour map, establishment geologic report, for crosscutting and construction directional drilling provide underlying parameter.
Step 2. crosscutting
Tunnel two crossdrifts in two extraction lanes of upper and lower different level respectively to coal seam, formed and be parallel to each other and four crossdrifts arranged in quadrangle, crossdrift stops head at seat earth normal apart from 2m place, and supporting is intact; The strike separation of four crossdrifts is more than 200m, and tendency spacing is about 60m, can form the seam face that an area is 1.2 ten thousand square metres.
Step 3. is constructed directional drilling
Directional drilling is implemented with large-power directional rig, by through for adjacent two crossdrifts, the moraine head of four crossdrifts is communicated with by four directional drillings, form quadrangle passage, boring is roughly parallel to seat earth, directional drilling and seat earth normal distance are determined to meet coal seam dilatancy and require, about designing changing in 1 ~ 5m apart from seat earth, must not contact coal seam simultaneously.Repeatedly boring is cleaned, to reduce mud and sand silting after construction directional drilling.
Capital equipment involved by directional drilling construction has 500m directional drilling machine and corollary equipment, diameter about 20mm diamond rope saw, high-power electrodeless rope winch etc.Above equipment is all ripe existing equipment, only need contact with equipment vendors the ability of carrying out and to improve and model confirms, can come into operation.
Step 4. settles diamond rope saw
The directional drilling machine completing directional drilling guides diamond rope saw to be placed in corresponding directional drilling when moving back brill, be finally together in series by the diamond rope saw in four directional drillings; When arrangement diamond rope saw, utilize directional drilling machine to guide simultaneously and wear-resisting guiding wirerope is installed, again to settle the guide rope of diamond rope saw after rupturing suddenly as later stage diamond rope saw.Install diamond rope saw leading block at one of them crossdrift moraine head of upper absolute altitude, this crossdrift moraine head is positioned at homonymy with the crossdrift moraine head installing diamond rope saw joint-cutting winch.
Step 5. implements joint-cutting operation
At one of them crossdrift moraine head of lower absolute altitude, diamond rope saw joint-cutting winch is installed, utilizes diamond rope saw joint-cutting winch to drive the diamond rope saw be together in series, carry out joint-cutting operation, in joint-cutting operation process, constantly tightening up cutting rope, to directly completing joint-cutting, forming the joint-cutting adjacent with coal seam.
During joint-cutting operation, booster is adopted to ventilate to quadrangle passage.Arrange the cooling fluid being used for cooling diamond rope saw in the rope-in end of diamond rope saw joint-cutting winch, spray cooling deslagging water in the rope-in end of each directional drilling.Make directional drilling rope-out end deslagging more unobstructed, diamond rope saw keeps low temperature cutting, prevents the overheated fusing of diamond rope saw.
Along with the increase gradually of joint-cutting area, unnecessary diamond rope saw reclaims immediately, reclaiming diamond rope saw adopts orbit determination movable pulley mechanism to coordinate pulling winch to complete: the track arranging the movable pulley mechanism of long 15m in the crossdrift of installing diamond rope saw joint-cutting winch, movable pulley mechanism is arranged on the front end of this track, the pulley of movable pulley mechanism connects diamond rope saw, movable pulley mechanism is drawn with pulling winch, when movable pulley is drawn to tail track, suspend joint-cutting operation and manually unload rope recovery diamond rope saw, then movable pulley is moved on to track front end and connect the operation of diamond rope saw recovery joint-cutting, diamond rope saw joint-cutting winch and pulling winch synchronous interaction.
Step 6. effect expedition, joint-cutting region protrusion-dispelling effect is investigated: after joint-cutting completes by coal seam dilatancy amount and gas remainder quantity, arrange firedamp taking-out discharging drilling, investigate coal seam dilatancy amount, after mash gas extraction decay, adopt the mode of region measure effect inspection to extract coal sample and carry out gas remainder quantity mensuration.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (10)
1. a seat earth rope sawing seam region outburst prevention measures, it is characterized in that, the method is carried out according to the following steps:
Step 1. verifies ocurrence of coal seam situation
Implement geology inspecting hole in extraction lane to coal seam, verify ocurrence of coal seam situation;
Step 2. crosscutting
Two crossdrifts are tunneled respectively to coal seam in two extraction lanes of upper and lower different level, formed and be parallel to each other and four crossdrifts arranged in quadrangle, crossdrift stops head near seat earth, and supporting is intact, and crossdrift moraine head and seat earth normal distance require to meet coal seam dilatancy and determine;
Step 3. is constructed directional drilling
Implement directional drilling with directional drilling machine, by through for adjacent two crossdrifts, the moraine head of four crossdrifts is communicated with by four directional drillings, forms quadrangle passage, and directional drilling and seat earth normal distance are determined to meet coal seam dilatancy and require;
Step 4. settles rope saw
The directional drilling machine strop saw when moving back brill completing directional drilling is placed in corresponding directional drilling, is finally together in series by the rope saw in four directional drillings;
Step 5. implements joint-cutting operation
At one of them crossdrift moraine head installing rope sawing seam winch of lower absolute altitude, utilize rope sawing seam winch to drive the rope saw be together in series, carry out joint-cutting operation, in joint-cutting operation process, constantly tightening up cutting rope, to directly completing joint-cutting, forming the joint-cutting adjacent with coal seam.
2. seat earth rope sawing seam region according to claim 1 outburst prevention measures, is characterized in that, in step 1, after geology inspecting hole, draw coal seam floor contour map, establishment geologic report, for crosscutting and construction directional drilling provide underlying parameter.
3. seat earth rope sawing seam region according to claim 1 outburst prevention measures, is characterized in that, in step 3, repeatedly clean boring, to reduce mud and sand silting after construction directional drilling.
4. seat earth rope sawing seam region according to claim 1 outburst prevention measures, it is characterized in that, in step 4, when arrangement rope saw, utilize directional drilling machine to guide simultaneously and guiding wirerope is installed, again to settle the guide rope of rope saw after so rupturing as later stage rope serrula.
5. seat earth rope sawing seam region according to claim 1 outburst prevention measures, it is characterized in that, in step 4, at one of them crossdrift moraine head installing rope saw leading block of upper absolute altitude, the crossdrift moraine head that winch is stitched in this crossdrift moraine head and installing rope sawing is positioned at homonymy.
6. seat earth rope sawing seam region according to claim 1 outburst prevention measures, is characterized in that, in step 5, adopt booster to ventilate to quadrangle passage.
7. seat earth rope sawing seam region according to claim 1 outburst prevention measures, is characterized in that, in step 5, arranging the cooling fluid for cooling rope saw, spraying cooling deslagging water in the rope-in end of each directional drilling in the rope-in end of rope sawing seam winch.
8. seat earth rope sawing seam region according to claim 1 outburst prevention measures, it is characterized in that, in step 5, along with the increase gradually of joint-cutting area, unnecessary rope saw reclaims immediately, reclaiming rope saw adopts orbit determination movable pulley mechanism to coordinate pulling winch to complete: the track arranging movable pulley mechanism in the crossdrift of installing rope sawing seam winch, movable pulley mechanism is arranged on the front end of this track, the pulley connection cord saw of movable pulley mechanism, movable pulley mechanism is drawn with pulling winch, when movable pulley is drawn to tail track, suspend joint-cutting operation and manually unload rope recovery rope saw, then movable pulley is moved on to track front end and connect the operation of rope saw recovery joint-cutting, rope sawing seam winch and pulling winch synchronous interaction.
9. seat earth rope sawing seam region according to claim 8 outburst prevention measures, is characterized in that, in step 2, the spacing between each crossdrift is determined according to the tractive force size of rope sawing seam winch and pulling winch.
10. seat earth rope sawing seam region according to claim 1 outburst prevention measures, it is characterized in that, also comprise step 6. effect expedition, joint-cutting region protrusion-dispelling effect is investigated: after joint-cutting completes by coal seam dilatancy amount and gas remainder quantity, arrange firedamp taking-out discharging drilling, investigate coal seam dilatancy amount, after mash gas extraction decay, adopt the mode of region measure effect inspection to extract coal sample and carry out gas remainder quantity mensuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511026615.2A CN105401976B (en) | 2015-12-30 | 2015-12-30 | Region anti-burst method is stitched in the sawing of seat earth rope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511026615.2A CN105401976B (en) | 2015-12-30 | 2015-12-30 | Region anti-burst method is stitched in the sawing of seat earth rope |
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| CN105401976A true CN105401976A (en) | 2016-03-16 |
| CN105401976B CN105401976B (en) | 2017-08-25 |
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