CN102777169A - Gas pressure depression angle measuring method and system - Google Patents
Gas pressure depression angle measuring method and system Download PDFInfo
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- CN102777169A CN102777169A CN2012102484804A CN201210248480A CN102777169A CN 102777169 A CN102777169 A CN 102777169A CN 2012102484804 A CN2012102484804 A CN 2012102484804A CN 201210248480 A CN201210248480 A CN 201210248480A CN 102777169 A CN102777169 A CN 102777169A
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Abstract
The invention provides a gas pressure depression angle measuring method and a gas pressure depression angle measuring system. The gas pressure depression angle measuring method comprises the following steps of: drilling a plurality of auxiliary grouting holes around a measuring hole to be drilled; respectively injecting plugging slurry into the auxiliary grouting holes; drilling a measuring hole at the position of the measuring hole to be drilled after the plugging slurry in the auxiliary grouting holes is completely solidified, and injecting the plugging slurry into the measuring hole; continuously drilling on a penetrated plugging section so as to form an embedded hole communicated with a coal bed to be measured after the plugging slurry in the measuring hole is completely solidified into a measuring plugging section; arranging a piezometer tube and an injection pipe in the embedded hole, and constructing a bottom sealing section nearby the embedded hole to form a pressure measuring chamber; and injecting the plugging slurry into the embedded hole, and obtaining a gas pressure value after solidification. According to the method, water in surrounding rock can be prevented from entering the coal bed to be measured, the accuracy of the measured gas pressure value is improved, and the gas pressure in the coal bed is really reflected.
Description
Technical field
The present invention relates to the coal mining field, relate in particular to a kind of gas pressure angle of depression measuring method and system.
Background technology
Coal-bed gas pressure is the power that gas is gushed out and given prominence to, and also judges the important indicator of coal body gas bearing capacity, and in roadway exposed coal process, accurately measuring coal-bed gas pressure is the key of safety, efficient, quick exposed coal.
The measuring process of the gas pressure of prior art is following: step a, in that direction gets out the measured hole about 3m and in this circular hole, injects the cement paste sealing of hole towards coal seam place on tunnel work plane or the ground; Step b, treat that cement paste solidifies after, in this measured hole, continue to creep into, make this measured hole penetrate that cement paste solidifies the cement paste layer of formation and extends to the place apart from the about 1m in coal seam in this circular hole, in measured hole, inject cement paste once more; Step c, wait to solidify after, in this measured hole, continue to creep into once more, so that this measured hole is extended in the coal seam; Then, piezometer tube and Grouting Pipe are lowered in the measured hole, and guarantee that the piezometer tube end is in the coal seam; The Grouting Pipe end is positioned at the terminal top of piezometer tube; Utilize plugging material shutoff formation back cover sections in measured hole such as polyurethane again, make the end of Grouting Pipe be positioned at back cover section top, the back cover section below that is arranged in the coal seam then forms pressure measuring chamber; Steps d, in measured hole, inject cement paste once more, after waiting to solidify, just can obtain the gas pressure in the coal seam through the pressure meter on piezometer tube top.
Adopting gas pressure measuring method of the prior art to carry out coal-bed gas pressure measures; Relatively be applicable to the pressure measurement of hole, the elevation angle; When the coal seam was positioned at the below on the tunnel work plane that need to bore measured hole or ground, tunnel, measured hole needed to extend along the direction that falls progressively downwards, when promptly measured hole is hole, the angle of depression; At this moment; Because there is the crack in the country rock around the measured hole; And in being lowered to piezometer tube and Grouting Pipe process; Measured hole be directly be communicated to the coal seam thereby country rock in water under action of gravity probably the crack in country rock flow in the coal seam, occupy the space, coal seam and cause gas pressure to change, thus the gas pressure value of obtaining inaccurate, can't reflect the real gas pressure in coal seam.
Summary of the invention
To above-mentioned defective of the prior art, the present invention provides a kind of gas pressure angle of depression measuring method and system, is used for avoiding the angle of depression to measure the gas pressure process, and the water in the country rock flow in the coal seam, improves the accuracy of the gas pressure value that records.
First aspect of the present invention provides a kind of gas pressure angle of depression measuring method, comprising:
Step 1, around waiting to bore the position of measured hole, get out the auxiliary injected hole that extend at least three court coal seams to be measured; The said position of boring measured hole of waiting is positioned at the polygonal center that said at least three auxiliary injected holes surround, and the said coal seam to be measured of distance first distance at the bottom of the hole of said auxiliary injected hole;
Step 2, inject the shutoff slurries to said auxiliary injected hole respectively, to block said auxiliary injected hole;
Step 3, treat that said shutoff slurries in said at least three auxiliary injected holes solidify fully after; Get out measured hole in the said position of boring measured hole of waiting; The said coal seam to be measured of distance second distance at the bottom of the hole of said measured hole, and in said measured hole, inject the shutoff slurries;
Step 4, treat shutoff slurries in the said measured hole solidify fully form measure the block section after, in said measured hole, penetrate said measurement block section and continue to creep into, to form the hole of inserting that is connected with said coal seam to be measured;
Step 5, to said insert to insert in the hole be used to measure the piezometer tube that gas pressure is measured in said coal seam to be measured; And the Grouting Pipe that is used to inject the shutoff slurries; And in the said hole of inserting near the bottom and be positioned at construction back cover section above the said coal seam to be measured, to form pressure measuring chamber;
Step 6, inject the shutoff slurries to said insert in the hole once more through said Grouting Pipe, with after first setting time, the pressure meter through said Grouting Pipe top obtains the coal-bed gas pressure in the said pressure measuring chamber.
Another aspect of the present invention provides a kind of gas pressure angle of depression measuring system; Comprise: a measured hole and at least three auxiliary injected holes that are located at around the said measured hole; The said coal seam to be measured of distance first distance at the bottom of the hole of said auxiliary injected hole, distance coal seam to be measured second distance at the bottom of the hole of said measured hole; Be filled with the seal section that the shutoff slurries solidify formation in the said auxiliary injected hole; Be equipped with one in the said measured hole and insert the hole, the said hole of inserting is connected with said coal seam to be measured, said inserting between hole and the said measured hole to measuring the block section; Said inserting is provided with the piezometer tube and the Grouting Pipe that is used to inject the shutoff slurries that is used to measure said coal-bed gas pressure to be measured in the hole; And be formed with the back cover section near the bottom and above said coal seam to be measured in the said hole of inserting; Said back cover section and the said bottom of inserting the hole surround pressure measuring chamber jointly; And said piezometer tube bottom is positioned at said pressure measuring chamber, and said Grouting Pipe bottom is positioned at said back cover section top; Said the inserting of said back cover section top is filled with the internal layer block section that the shutoff slurries solidify formation in the hole.
Gas pressure provided by the invention angle of depression measuring method and system; Through being arranged on measured hole a plurality of auxiliary injected hole on every side; Can effectively block and wait to bore the crack in the country rock around the measured hole; Make water major part in the country rock be intercepted at outside the zone that auxiliary injected hole surrounds, avoided the water in the country rock by measured hole and insert the hole and enter into coal seam to be measured, thereby improved the accuracy of the gas pressure value of obtaining; Can reflect the gas pressure in the coal seam more truly, further guarantee coal mine production safety.
Description of drawings
Fig. 1 is the flow chart of gas pressure of the present invention angle of depression measuring method embodiment;
Fig. 2 is the structural representation of gas pressure of the present invention angle of depression measuring system embodiment;
Fig. 3 be among Fig. 2 A-A to view.
The specific embodiment
Fig. 1 is the flow chart of gas pressure of the present invention angle of depression measuring method embodiment; As shown in Figure 1, present embodiment provides a kind of gas pressure angle of depression measuring method, comprising:
Step 101, around waiting to bore the position of measured hole, get out the auxiliary injected hole that extend at least three court coal seams to be measured; The said position of boring measured hole of waiting is positioned at the polygonal center that said at least three auxiliary injected holes surround, and distance coal seam to be measured first distance at the bottom of the hole of said auxiliary injected hole.
Particularly, measured hole can be chosen on tunnel work plane or the ground and be drilled with, and auxiliary grouting port can be chosen on same tunnel work plane or the bottom surface with measured hole and be drilled with; The sum of auxiliary injected hole can be for more than three, and the circumscribed circle home position of the auxiliary injected hole that guarantees to get out is the position that is drilled with of measured hole; Need to prove; The circumscribed circle diameter of above-mentioned auxiliary injected hole can be according to assisting the total different of injected hole; When the circumscribed circle diameter of above-mentioned auxiliary injected hole is big; The quantity of auxiliary injected hole should be more, when the circumscribed circle diameter of above-mentioned auxiliary injected hole hour, the quantity of auxiliary injected hole can be less.
Preferably, auxiliary injected hole can be 4, and first distance can be less than or equal to 1m, and it is good that the polygonal circumscribed circle diameter that above-mentioned auxiliary injected hole surrounded is no more than 3m, can be 2～3m.
Preferably, first distance in distance coal seam to be measured can be less than or equal to said second distance at the bottom of the hole of said auxiliary injected hole; The diameter of said auxiliary injected hole can be 94mm.。
Step 102, inject the shutoff slurries to said auxiliary injected hole respectively, to block said auxiliary injected hole; Particularly, the shutoff injection slurry can be cement paste, can certainly be other slurries that can fill the space and can solidify.
Step 103, treat that said shutoff slurries in said at least three auxiliary injected holes solidify fully after; Get out measured hole in the said position of boring measured hole of waiting; The said coal seam to be measured of distance second distance at the bottom of the hole of said measured hole, and in said measured hole, inject the shutoff slurries.
Particularly, second distance can be less than or equal to 1m; Here; After the shutoff slurries in three auxiliary injected holes solidify fully; Again in construction survey hole, regional center place that a plurality of auxiliary injected holes surround; Crack in the rock stratum in the zone that auxiliary injected hole surrounds more than three is crammed by the shutoff injection slurry, play the effect that water flows to the measured hole place of Hot work in progress in the interception country rock.
Step 105, to said insert to insert in the hole be used to measure the piezometer tube that gas pressure is measured in said coal seam to be measured; And the Grouting Pipe that is used to inject the shutoff slurries; And in the said hole of inserting near the bottom and be positioned at construction back cover section above the said coal seam to be measured, to form pressure measuring chamber.
Particularly, the piezometer tube end can reach in the coal seam, and Grouting Pipe also extend into inserts the hole but the Grouting Pipe end should be in coal seam top; Just a baffle plate capable of using is then separated coal seam and rock stratum inserting the hole; And utilize polyurethane and rock wool above the baffle plate with piezometer tube and insert to fill between the sidewall of hole and form the back cover section; Thereby; The hole of inserting below the back cover section surrounds the pressure measuring chamber that is in the coal seam, and the piezometer tube end then is in this pressure measuring chamber, and the end of Grouting Pipe then is positioned at the top of back cover section.
Step 106, inject the shutoff slurries to said insert in the hole once more through said Grouting Pipe, with after first setting time, the pressure meter through said Grouting Pipe top obtains the coal-bed gas pressure in the said pressure measuring chamber.
The gas pressure angle of depression measuring method that present embodiment provides; Through the auxiliary injected hole of before the construction survey hole, around correspondence position, constructing earlier; And inject the shutoff slurries to auxiliary injected hole, and effectively blocked and waited to bore the crack in the country rock around the measured hole, make water major part in the country rock be intercepted at outside the zone that auxiliary injected hole surrounds; Avoided the water in the country rock by measured hole and insert the hole and enter into coal seam to be measured; Thereby improved the accuracy of the gas pressure value of obtaining, can reflect the gas pressure in the coal seam more truly, further guaranteed coal mine production safety.
In the above-described embodiments; Step 103 can also comprise: after said position of waiting to bore measured hole gets out measured hole; In said measured hole, put into the sleeve pipe isometric with said measured hole; In said measured hole, inject said shutoff slurries then, and the internal diameter of said sleeve pipe is greater than said diameter of inserting the hole; After getting out measured hole; In measured hole, insert earlier the sleeve pipe that diameter is slightly less than measured hole; Can make the shutoff slurries solidify the back better and be integrally formed with the measured hole sidewall, and sleeve pipe can also strengthen the plugging effect to measured hole, block current direction coal seam to be measured in the rock stratum to a greater degree.
Wherein, preferably, the diameter of said measured hole can be 153mm or 133mm, and the diameter of said sleeve pipe is 108mm.
Fig. 2 is the structural representation of gas pressure of the present invention angle of depression measuring system embodiment; Fig. 3 be among Fig. 2 A-A to view; Another embodiment of the present invention provides a kind of gas pressure angle of depression measuring system; As shown in Figures 2 and 3; Comprise: a measured hole 21 and at least three auxiliary injected holes 22 that are located at around the measured hole 21; Distance coal seam to be measured 30 first distances at the bottom of the hole of auxiliary injected hole 22, distance coal seam to be measured 30 second distances at the bottom of the hole of measured hole 21; Be filled with the seal section that the shutoff slurries solidify formation in the auxiliary injected hole 22; Be equipped with one in the measured hole 21 and insert hole 211, insert hole 211 and be connected, insert between hole 211 and the measured hole 21 to measuring block section 212 with coal seam 30 to be measured; Insert and be provided with the piezometer tube 31 and the Grouting Pipe 32 that is used to inject the shutoff slurries that is used to measure coal seam to be measured 30 gas pressures in the hole 211; And be formed with back cover section 33 near the bottom and above coal seam 30 to be measured inserting hole 211; Back cover section 33 surrounds pressure measuring chamber 301 jointly with the bottom of inserting hole 211; And piezometer tube 31 bottoms are positioned at pressure measuring chamber 301, and Grouting Pipe 32 bottoms are positioned at back cover section 33 tops; Inserting of back cover section 33 tops is filled with the internal layer block section that the shutoff slurries solidify formation in the hole 211.
Need to prove; Do not represent among Fig. 3 that measured hole 21 and the bearing of trend of inserting hole 211 be that the bearing of trend in level and coal seam to be measured 30 do not represent yet are vertical; Actual conditions are, measured hole 21 can extend to any direction in horizontal plane below with the bearing of trend of inserting hole 211, and measured hole 21 then can be perpendicular to coal seam 30 to be measured with the bearing of trend of inserting hole 211; So that creep into apart from shorter energy conservation.
Particularly, measured hole 21 can be positioned on same tunnel work plane or the ground with auxiliary injected hole 22, and the sum of auxiliary injected hole 22 can be for more than three, and measured hole 21 is positioned at the circumscribed circle circle centre position of a plurality of auxiliary injected holes 22; Need to prove; The circumscribed circle diameter of auxiliary injected hole 22 can be according to assisting the total different of injected hole; When the circumscribed circle diameter of above-mentioned auxiliary injected hole was big, accordingly, the quantity of auxiliary injected hole should be more; When the circumscribed circle diameter of above-mentioned auxiliary injected hole hour, the quantity of auxiliary injected hole can be corresponding less.
The gas pressure angle of depression measuring system of present embodiment; Can piezometer tube 31 tops be connected a pressure meter,, and not be communicated with each other with the rock stratum of its top because pressure measurement is 301 to be arranged in coal seam 30 to be measured; Therefore; Gas pressure in the coal seam to be measured 3 that pressure in the pressure measuring chamber 301 just reflects promptly, just can be obtained the gas pressure value in coal seam 30 to be measured by manometric reading.
Because in the gas pressure angle of depression measuring system that present embodiment provides; Be provided with a plurality of auxiliary injected holes 22 around the measured hole 21; Through the plugging action of auxiliary injected hole 22, can make most of water in the rock stratum be intercepted at auxiliary injected hole 22 and surround outside the zone, avoided rock stratum Zhong Shui to flow into measured hole 21 and insert hole 211 after enter into coal seam to be measured; Got rid of in the coal seam to be measured water to the influence of measured gas pressure value; Make the pressure value that obtains from piezometer tube can reflect the gas pressure the coal seam more realistically, improved the measurement accuracy, help improving coal mine production safety property.
In the above-described embodiments, also comprise: be located in the measured hole 21 and be around in the sleeve pipe 213 of inserting 211 outsides, hole, sleeve pipe 213 can equate with measured hole 21 length.That is to say; After getting out measured hole 21; Can in measured hole 21, insert the sleeve pipe 213 that diameter is slightly less than measured hole earlier; Be integrally formed with the measured hole sidewall to make the shutoff slurries solidify the back better, and sleeve pipe 213 can also strengthen the plugging effect to measured hole 21, block current direction coal seam to be measured in the rock stratum to a greater degree.
Preferably, first distance in distance coal seam to be measured is less than or equal to the second distance in distance coal seam 30 to be measured at the bottom of the hole of measured hole 21 at the bottom of the hole of auxiliary injected hole 22, to tackle flowing of water in the country rock more in all directions, more helps anti-sealing and gets into coal seam to be measured.
Further, auxiliary injected hole 22 can be four, and first distance can be less than or equal to 1m, and the polygonal circumscribed circle diameter that four auxiliary injected holes 22 are surrounded can be 2～3m.With the construction of convenient auxiliary injected hole, and reach good interception water and flow, obtain force value accurately to the coal seam.
Further, the diameter of auxiliary injected hole 22 can be 94mm, and the diameter of measured hole 21 can be 153mm or 133mm, and the diameter of sleeve pipe 213 can be 108mm; That is, it is that the drill bit of 94mm is drilled to that auxiliary injected hole 22 can adopt diameter, and it is that the drill bit of 153mm or 133mm is drilled to that measured hole 21 can adopt diameter, and the drill bit of these models all be to use drill bit always during mine is produced, and helps improving utilization rate of equipment and installations; And the selection in above-mentioned aperture helps process operations such as slip casting, following pipe, helps improving the efficient that gas pressure is measured.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (10)
1. a gas pressure angle of depression measuring method is characterized in that, comprising:
Step 1, around waiting to bore the position of measured hole, get out the auxiliary injected hole that extend at least three court coal seams to be measured; The said position of boring measured hole of waiting is positioned at the polygonal center that said at least three auxiliary injected holes surround, and the said coal seam to be measured of distance first distance at the bottom of the hole of said auxiliary injected hole;
Step 2, inject the shutoff slurries to said auxiliary injected hole respectively, to block said auxiliary injected hole;
Step 3, treat that said shutoff slurries in said at least three auxiliary injected holes solidify fully after; Get out measured hole in the said position of boring measured hole of waiting; The said coal seam to be measured of distance second distance at the bottom of the hole of said measured hole, and in said measured hole, inject the shutoff slurries;
Step 4, treat shutoff slurries in the said measured hole solidify fully form measure the block section after, in said measured hole, penetrate said measurement block section and continue to creep into, to form the hole of inserting that is connected with said coal seam to be measured;
Step 5, to said insert to insert in the hole be used to measure the piezometer tube that gas pressure is measured in said coal seam to be measured; And the Grouting Pipe that is used to inject the shutoff slurries; And in the said hole of inserting near the bottom and be positioned at construction back cover section above the said coal seam to be measured, to form pressure measuring chamber;
Step 6, inject the shutoff slurries to said insert in the hole once more through said Grouting Pipe, with after first setting time, the pressure meter through said Grouting Pipe top obtains the coal-bed gas pressure in the said pressure measuring chamber.
2. gas pressure according to claim 1 angle of depression measuring method is characterized in that said step 3 also comprises:
After said position of waiting to bore measured hole gets out measured hole, in said measured hole, put into the sleeve pipe isometric with said measured hole, in said measured hole, inject said shutoff slurries then, and the said hole of inserting is positioned at said sleeve pipe.
3. gas pressure according to claim 1 angle of depression measuring method is characterized in that, said first distance is less than or equal to second distance.
4. gas pressure according to claim 1 angle of depression measuring method is characterized in that said auxiliary injected hole is four, and said first distance is less than or equal to 1m, and the circumscribed circle diameter of said four changeable shapes that auxiliary injected hole surrounded is 2～3m.
5. according to the arbitrary described gas pressure of claim 1 to 4 angle of depression measuring method, it is characterized in that the diameter of said auxiliary injected hole is 94mm, the diameter of said measured hole is 153mm or 133mm, and the diameter of said sleeve pipe is 108mm.
6. a gas pressure angle of depression measuring system is characterized in that, comprising:
One measured hole and at least three auxiliary injected holes that are located at around the said measured hole, the said coal seam to be measured of distance first distance at the bottom of the hole of said auxiliary injected hole, distance coal seam to be measured second distance at the bottom of the hole of said measured hole; Be filled with the seal section that the shutoff slurries solidify formation in the said auxiliary injected hole; Be equipped with one in the said measured hole and insert the hole, the said hole of inserting is connected with said coal seam to be measured, said inserting between hole and the said measured hole to measuring the block section; Said inserting is provided with the piezometer tube and the Grouting Pipe that is used to inject the shutoff slurries that is used to measure said coal-bed gas pressure to be measured in the hole; And be formed with the back cover section near the bottom and above said coal seam to be measured in the said hole of inserting; Said back cover section and the said bottom of inserting the hole surround pressure measuring chamber jointly; And said piezometer tube bottom is positioned at said pressure measuring chamber, and said Grouting Pipe bottom is positioned at said back cover section top; Said the inserting of said back cover section top is filled with the internal layer block section that the shutoff slurries solidify formation in the hole.
7. gas pressure according to claim 6 angle of depression measuring system is characterized in that, also comprises:
Be located in the said measured hole and be around in said sleeve pipe, said sleeve pipe and the said measured hole equal in length of inserting the outside, hole.
8. gas pressure according to claim 6 angle of depression measuring system is characterized in that, said first distance is less than or equal to second distance.
9. gas pressure according to claim 6 angle of depression measuring system is characterized in that said auxiliary injected hole is four, and said first distance is less than or equal to 1m, and said four polygonal circumscribed circle diameters that auxiliary injected hole surrounded are 2～3m.
10. according to the arbitrary described gas pressure of claim 6 to 9 angle of depression measuring system, it is characterized in that the diameter of said auxiliary injected hole is 94mm, the diameter of said measured hole is 153mm or 133mm, and the diameter of said sleeve pipe is 108mm.
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| CN201210248480.4A CN102777169B (en) | 2012-07-18 | 2012-07-18 | Gas pressure angle of depression measuring method and system |
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| CN104389587A (en) * | 2014-10-11 | 2015-03-04 | 安徽建筑大学 | Quick measurement method of coal seam gas pressure |
| CN113153273A (en) * | 2021-03-18 | 2021-07-23 | 华能煤炭技术研究有限公司 | Coal bed gas pressure measuring structure and measuring method |
| CN113464122A (en) * | 2021-06-23 | 2021-10-01 | 中国矿业大学 | Method for improving gas pressure determination accuracy through auxiliary drilling |
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| Publication number | Publication date |
|---|---|
| CN102777169B (en) | 2015-10-21 |
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