CN106194101A - A kind of dynamic crack, coal seam automatic filling sealing device and method - Google Patents
A kind of dynamic crack, coal seam automatic filling sealing device and method Download PDFInfo
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- CN106194101A CN106194101A CN201610535505.7A CN201610535505A CN106194101A CN 106194101 A CN106194101 A CN 106194101A CN 201610535505 A CN201610535505 A CN 201610535505A CN 106194101 A CN106194101 A CN 106194101A
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- 238000007789 sealing Methods 0.000 title claims abstract description 90
- 239000003245 coal Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000000605 extraction Methods 0.000 claims abstract description 20
- 239000011440 grout Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract 2
- 239000002002 slurry Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims 9
- 238000012806 monitoring device Methods 0.000 claims 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000008054 signal transmission Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
本发明公开了一种煤层动态裂隙自动充填密封装置及方法，包括常规密封系统和动态密封系统。所述常规密封系统主要采用封孔深度为5~12m的带压“两堵一注”的封孔技术对抽采钻孔进行一次密封，所述动态密封系统主要采用位于抽采钻孔周围的若干动态密封孔进行多次动态密封。所述常规密封系统中的瓦斯抽采管管口上连接瓦斯浓度监测器用来对瓦斯浓度进行实时监测，所述动态密封系统中的动态密封钻孔注浆管管口上连接浆液压力监测器对注浆管内浆液压力进行监测，各微处理器对各监测器传输的数据分别进行分析，发送相应指令控制注浆泵的启停。本发明能够对煤层动态发育的裂隙进行自动充填，具有封孔深度短，高效抽采时间长和抽采瓦斯量高的显著特征。
The invention discloses a coal seam dynamic fissure automatic filling and sealing device and method, comprising a conventional sealing system and a dynamic sealing system. The conventional sealing system mainly adopts the sealing technology of "two plugs and one injection" under pressure with a sealing depth of 5-12m to seal the drainage borehole once, and the dynamic sealing system mainly adopts the Several dynamic sealing holes perform multiple dynamic sealing. The mouth of the gas extraction pipe in the conventional sealing system is connected to a gas concentration monitor for real-time monitoring of the gas concentration, and the mouth of the dynamic sealing drilling grouting pipe in the dynamic sealing system is connected to a grout pressure monitor to monitor the gas concentration. The pressure of the grout in the pipe is monitored, and each microprocessor analyzes the data transmitted by each monitor, and sends corresponding instructions to control the start and stop of the grouting pump. The invention can automatically fill the dynamically developed fissures in the coal seam, and has the remarkable characteristics of short sealing depth, long efficient extraction time and high extraction gas volume.
Description
技术领域technical field
本发明涉及井工钻孔瓦斯抽采技术领域，尤其涉及一种煤层动态裂隙自动充填密封装置及方法。The invention relates to the technical field of well drilling gas drainage, in particular to an automatic filling and sealing device and method for dynamic cracks in coal seams.
背景技术Background technique
煤矿瓦斯抽采是防治矿井瓦斯灾害和利用煤层气资源的有效措施，然而我国井工瓦斯抽采浓度总体不高，且衰减快。瓦斯抽采效果的好坏受封孔质量的严重影响，特别是在煤巷中表现更为明显。国内现有的封孔技术一般只做到一次成孔或二次修复因而往往抽采前期效果良好，后期出现不同程度的漏气问题，缩短了钻孔抽采寿命。为了达到高浓度抽采，大部分矿区延长了封孔深度，这就增加了封孔难度和成本，另外，钻孔多是通过人工操作实现密封。这样既增加了技术操作难度，又消耗大量人力物力。Coal mine gas drainage is an effective measure to prevent and control mine gas disasters and utilize coalbed methane resources. However, the concentration of underground gas drainage in my country is generally not high and decays quickly. The quality of gas drainage is seriously affected by the quality of hole sealing, especially in coal roadways. The existing sealing technology in China generally only achieves one-time hole formation or two-time repair, so the early-stage drainage effect is often good, and there are different degrees of air leakage problems in the later stage, which shortens the drilling life. In order to achieve high-concentration extraction, most mining areas have extended the sealing depth, which increases the difficulty and cost of sealing. In addition, most of the drilling is sealed manually. This has not only increased the difficulty of technical operation, but also consumes a lot of manpower and material resources.
发明内容Contents of the invention
本发明内容主要解决现有注浆密封工艺存在的问题，提供一种煤层动态裂隙自动充填密封装置及方法。可对煤层裂隙实现动态连续的密封，实现钻孔瓦斯高效抽采。The content of the present invention mainly solves the problems existing in the existing grouting and sealing technology, and provides an automatic filling and sealing device and method for dynamic cracks in coal seams. It can realize dynamic and continuous sealing of coal seam fissures, and realize high-efficiency drilling gas extraction.
本发明所采用的技术方案是：一种煤层动态裂隙自动充填密封装置包括常规密封系统和动态密封系统，常规密封系统的工艺：常规密封系统中的抽采钻孔进行瓦斯抽采，封孔深度及封孔段长度抽采钻孔按照预先设计，使用聚氨酯和挡板作为堵头，通过注浆管将高强度的水泥浆液压入抽采钻孔中指定封孔段。当返浆管中有浆液回浆时，关闭返浆管，进行带压二次注浆，直至压力达到预定阈值，完成常规密封。The technical solution adopted in the present invention is: a coal seam dynamic fissure automatic filling and sealing device includes a conventional sealing system and a dynamic sealing system. The drainage borehole is pre-designed according to the length of the sealing section, and polyurethane and baffles are used as plugs, and high-strength cement slurry is hydraulically injected into the designated sealing section of the drainage borehole through the grouting pipe. When there is grout return in the grout return pipe, close the grout return pipe and carry out secondary grouting under pressure until the pressure reaches the predetermined threshold to complete the conventional sealing.
动态密封系统工艺：在抽采钻孔周围施工若干长度小于抽采钻孔封孔深度的动态密封孔，封孔深度及密封室的长度按照预先设定，使用注浆泵将裂隙充填液通过注浆管压入孔内预留的动态密封室内，并通过动态密封室扩散到周围裂隙。抽采钻孔管口接瓦斯浓度监测器，对瓦斯抽采浓度进行监测，瓦斯浓度监测器通过信号传输线与瓦斯浓度微处理器连接；动态密封孔的注液管管口接浆液压力监测器对浆液压力进行监测，浆液压力监测器通过信号传输线与浆液压力微处理器连接。当瓦斯浓度监测器监测到瓦斯浓度低于预定阈值，信号通过信号传输线传送到瓦斯浓度微处理器，瓦斯浓度微处理器发送启动注浆泵指令，注浆泵将裂隙填充液注入动态密封钻孔的动态密封室；当浆液压力传感器监测到的浆液压力高于预定阈值，信号通过信号传输线传送到浆液压力微处理器，浆液压力微处理器发送停止注浆泵指令，注浆泵停止注液，如此反复循环，完成动态密封。Dynamic sealing system technology: Construction of several dynamic sealing holes around the drainage borehole whose length is less than the sealing depth of the drainage drilling hole, the sealing depth and the length of the sealing chamber are set in advance, and the fissure filling fluid is injected through the grouting pump. The slurry pipe is pressed into the dynamic sealing chamber reserved in the hole, and spreads to the surrounding cracks through the dynamic sealing chamber. The mouth of the drainage borehole is connected to the gas concentration monitor to monitor the gas extraction concentration. The gas concentration monitor is connected to the gas concentration microprocessor through the signal transmission line; the mouth of the liquid injection pipe of the dynamic sealing hole is connected to the slurry pressure monitor. The slurry pressure is monitored, and the slurry pressure monitor is connected with the slurry pressure microprocessor through a signal transmission line. When the gas concentration monitor detects that the gas concentration is lower than the predetermined threshold, the signal is transmitted to the gas concentration microprocessor through the signal transmission line, and the gas concentration microprocessor sends an instruction to start the grouting pump, and the grouting pump injects the fracture filling fluid into the dynamic sealing borehole dynamic sealing chamber; when the grout pressure detected by the grout pressure sensor is higher than the predetermined threshold, the signal is transmitted to the grout pressure microprocessor through the signal transmission line, and the grout pressure microprocessor sends an instruction to stop the grouting pump, and the grouting pump stops injecting liquid, This cycle is repeated to complete the dynamic seal.
所述常规密封系统封孔深度为5~12m，封孔段长度为3~8m。The sealing depth of the conventional sealing system is 5-12m, and the length of the sealing section is 3-8m.
所述堵头由聚氨酯和两侧的挡板组成，挡板使聚氨酯径向膨胀。The plug is composed of polyurethane and baffles on both sides, and the baffles make the polyurethane expand radially.
所述动态密封系统的动态密封孔孔径为30~130mm，长度为3~11m，封孔深度为2~10m，动态密封室长度为0.5~2m。The dynamic sealing hole diameter of the dynamic sealing system is 30-130mm, the length is 3-11m, the sealing depth is 2-10m, and the length of the dynamic sealing chamber is 0.5-2m.
所述动态密封系统的动态密封孔的注液管管径为8~50mm。The liquid injection pipe diameter of the dynamic sealing hole of the dynamic sealing system is 8-50mm.
所述动态密封孔距抽采钻孔的距离为0.3~0.8m。The distance between the dynamic sealing hole and the drainage borehole is 0.3-0.8m.
针对不同煤体结构的抽采煤体，动态密封孔采取不同的钻孔布置方式。Different drilling arrangements are adopted for the dynamic sealing holes for the extracted coal bodies with different coal body structures.
本发明的有益效果是通过本发明装置及方法可以对煤层裂隙进行动态充填，具有钻孔封孔深度比传统封孔技术短、高效连续抽采时间长和抽采瓦斯量高的显著特征，抽采效果和经济效益优势明显。The beneficial effect of the present invention is that the coal seam fissures can be dynamically filled through the device and method of the present invention, which has the remarkable characteristics of shorter drilling depth than the traditional sealing technology, long efficient continuous extraction time and high extraction gas volume. The advantages of mining effect and economic benefit are obvious.
附图说明Description of drawings
图1是本发明的结构示意图。图中：1-常规密封系统，2-动态密封系统，3-水泥浆液注浆管，4-水泥浆液返浆管，5-抽采管，6-裂隙填充液注液管，7-动态密封室，8-瓦斯浓度监测器，9-瓦斯浓度为处理器，10-浆液压力监测器，11-浆液压力微处理器，12-注浆泵，13-聚氨酯，14-挡板，15-抽采钻孔，16-动态密封钻孔，17-信号传输线。Fig. 1 is a schematic structural view of the present invention. In the figure: 1-conventional sealing system, 2-dynamic sealing system, 3-cement slurry injection pipe, 4-cement slurry return pipe, 5-drainage pipe, 6-fissure filling fluid injection pipe, 7-dynamic sealing Chamber, 8-gas concentration monitor, 9-gas concentration processor, 10-slurry pressure monitor, 11-slurry pressure microprocessor, 12-grouting pump, 13-polyurethane, 14-baffle, 15-pump Mining drilling, 16-dynamic sealing drilling, 17-signal transmission line.
图2是本发明的构造煤钻孔布置示意图。图中：15-抽采钻孔，16-动态密封钻孔。Fig. 2 is a schematic diagram of the drilling arrangement of structural coal in the present invention. In the figure: 15-drainage drilling, 16-dynamic sealing drilling.
图3是本发明的原生结构煤钻孔布置示意图。图中：15-抽采钻孔，16-动态密封钻孔。Fig. 3 is a schematic diagram of the drilling arrangement of primary structure coal in the present invention. In the figure: 15-drainage drilling, 16-dynamic sealing drilling.
具体实施方式detailed description
图1是本发明的装置的结构示意图。所述的常规密封系统1用来支护和封堵抽采钻孔并封堵钻孔开挖形成的裂隙，抽采钻孔16进行瓦斯抽采，使用聚氨酯13和挡板14作为堵头，封孔深度为5~12m，封孔段长度为3~8m，使用注浆泵12通过水泥浆液注浆管3将水泥砂浆注入封孔段，待水泥浆液返浆管4返浆关闭水泥浆液返浆管4，进行二次带压注浆，直至压力表的压力达到预定阈值，完成常规密封。Fig. 1 is a schematic structural view of the device of the present invention. The conventional sealing system 1 is used to support and seal the drainage borehole and seal the cracks formed by the excavation of the borehole. The drainage borehole 16 is used for gas drainage, and polyurethane 13 and baffle plate 14 are used as plugs. The hole sealing depth is 5~12m, and the length of the hole sealing section is 3~8m. Use the grouting pump 12 to inject cement mortar into the hole sealing section through the cement slurry injection pipe 3, and close the cement slurry return pipe 4 when the cement slurry returns to the slurry. The grouting pipe 4 is subjected to secondary grouting under pressure until the pressure of the pressure gauge reaches a predetermined threshold, and the conventional sealing is completed.
所述的动态密封系统2用来连续填充巷道开挖煤体卸压产生的裂隙，在抽采钻孔15周围施工若干的动态密封钻孔16，其中动态密封钻孔16的长度为3~11m，封孔深度为2~10m，动态密封室7的长度为0.5~2m。使用注浆泵12将裂隙充填液通过裂隙填充液注液管6压入孔内预留的动态密封室7内。抽采管5管口接瓦斯浓度监测器8，瓦斯浓度监测器8通过信号传输线17与瓦斯浓度微处理器9连接；动态密封钻孔16的裂隙填充液注液管6管口接浆液压力监测器10，浆液压力监测器10通过信号传输线17与浆液压力微处理器11连接。当瓦斯浓度监测器8监测到瓦斯浓度低于预定阈值，信号通过信号传输线18传递到瓦斯浓度微处理器9，瓦斯浓度微处理器9发送启动注浆泵指令，注浆泵12将裂隙填充液注入动态密封钻孔16的动态密封室7；当浆液压力传感器10监测到的浆液压力高于预定阈值，信号通过信号传输线18传送到浆液压力微处理器11，浆液压力微处理器11发送停止注浆泵指令，注浆泵12停止注液，如此反复循环，完成动态密封。The dynamic sealing system 2 is used to continuously fill the cracks produced by coal body pressure relief during roadway excavation, and a number of dynamic sealing boreholes 16 are constructed around the extraction borehole 15, wherein the length of the dynamic sealing borehole 16 is 3-11m , the sealing depth is 2~10m, and the length of the dynamic sealing chamber 7 is 0.5~2m. Use the grout pump 12 to press the fissure filling fluid through the fissure filling fluid injection pipe 6 into the reserved dynamic sealing chamber 7 in the hole. The mouth of the drainage pipe 5 is connected to the gas concentration monitor 8, and the gas concentration monitor 8 is connected to the gas concentration microprocessor 9 through the signal transmission line 17; The slurry pressure monitor 10 is connected to the slurry pressure microprocessor 11 through a signal transmission line 17 . When the gas concentration monitor 8 detects that the gas concentration is lower than the predetermined threshold, the signal is transmitted to the gas concentration microprocessor 9 through the signal transmission line 18, and the gas concentration microprocessor 9 sends an instruction to start the grouting pump, and the grouting pump 12 sends the crack filling liquid Inject into the dynamic sealing chamber 7 of the dynamic sealing borehole 16; when the slurry pressure monitored by the slurry pressure sensor 10 is higher than a predetermined threshold, the signal is transmitted to the slurry pressure microprocessor 11 through the signal transmission line 18, and the slurry pressure microprocessor 11 sends a stop injection Grouting pump instruction, grouting pump 12 stops injecting liquid, so repeats cycle, completes dynamic sealing.
图2是本发明的构造煤钻孔布置示意图，对于煤体结构为构造煤的瓦斯抽采地点，采用如图所示的钻孔布置进行动态密封，两个动态密封孔16分别位于抽采钻孔15的上下方，距离抽采钻孔15的距离为0.3~0.8m。Fig. 2 is a schematic diagram of the layout of structural coal boreholes of the present invention. For gas drainage sites where the coal body structure is structural coal, dynamic sealing is performed using the drilling arrangement as shown in the figure. Two dynamic sealing holes 16 are respectively located in the drainage drill Above and below the hole 15, the distance from the extraction borehole 15 is 0.3-0.8m.
图3是本发明的原生结构煤钻孔布置示意图，对于煤体结构为原生结构煤的瓦斯抽采地点，采用如图所示的钻孔布置进行动态密封，四个动态密封孔16分别位于抽采钻孔15的左上、左下、右上、右下方，距离抽采钻孔15的距离为0.3~0.8m。Fig. 3 is a schematic diagram of the drill hole layout of the primary structure coal of the present invention. For the gas drainage site where the coal body structure is the primary structure coal, the drill hole layout as shown in the figure is used for dynamic sealing, and the four dynamic sealing holes 16 are respectively located at the The upper left, lower left, upper right, and lower right of the extraction borehole 15 are 0.3-0.8m away from the extraction borehole 15.
Claims (8)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538159A (en) * | 2018-11-14 | 2019-03-29 | 淮南矿业(集团)有限责任公司 | A kind of remote grouting method and grouting system |
| CN111963150A (en) * | 2020-08-27 | 2020-11-20 | 安徽理工大学 | Coal bed gas pressure measuring device and using method |
| 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 |
| CN113236347A (en) * | 2021-06-28 | 2021-08-10 | 山东科技大学 | Full-automatic gas extraction multiple hole sealing system and method |
| CN116291571A (en) * | 2023-02-08 | 2023-06-23 | 山西晋煤集团技术研究院有限责任公司 | A control method for surrounding rock of bottom drainage roadway affected by gas drainage drilling damage |
| CN119266765A (en) * | 2024-11-26 | 2025-01-07 | 中国矿业大学 | A drilling integrated sealing system and method with dynamic sealing-flexible spraying |
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| CN102606208A (en) * | 2011-01-20 | 2012-07-25 | 淮南矿业(集团)有限责任公司 | Automatic drainage process of downward through beds hole |
| CN202882842U (en) * | 2012-11-02 | 2013-04-17 | 淮南矿业(集团)有限责任公司 | Hole sealing device |
| CN105298437A (en) * | 2015-04-14 | 2016-02-03 | 河南理工大学 | Method of automatically sealing gas drainage borehole |
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