WO2016110186A1 - 一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法 - Google Patents

一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法 Download PDF

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WO2016110186A1
WO2016110186A1 PCT/CN2015/098156 CN2015098156W WO2016110186A1 WO 2016110186 A1 WO2016110186 A1 WO 2016110186A1 CN 2015098156 W CN2015098156 W CN 2015098156W WO 2016110186 A1 WO2016110186 A1 WO 2016110186A1
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hole
gas
extraction
steam
pipe
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French (fr)
Inventor
林柏泉
郭畅
邹全乐
刘厅
朱传杰
孔佳
闫发志
姚浩
洪溢都
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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Priority to AU2015376362A priority Critical patent/AU2015376362B2/en
Priority to US15/322,457 priority patent/US10060238B2/en
Publication of WO2016110186A1 publication Critical patent/WO2016110186A1/zh
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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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/006—Production of coal-bed methane
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/2405—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0078—Nozzles used in boreholes

Definitions

  • the invention relates to a drilling and cutting integration and an oscillating heat injection synergistically strengthening a coal seam gas drainage method, and is particularly suitable for gas control in a high gas coal seam area of a microporous, low permeability and high adsorption coal mine.
  • China's coal seams generally have the characteristics of high gas pressure, high content, low permeability and strong adsorption. Gas drainage is extremely difficult. Therefore, artificially increasing the coal seam, increasing the permeability of the coal seam and increasing the pre-extraction rate of the gas are important ways to ensure the safe production of coal mines.
  • the water conservancy measures represented by hydraulic slitting have been widely used in the gas control process of coal mines in China due to their high efficiency of pressure relief and permeability enhancement.
  • the permeability of coal seams is low. Due to the limitation of water jet cutting and high-pressure water impact crushing, the pressure-reducing effect is limited, the gas drainage concentration is low, and the extraction period is long. Unable to meet high-strength coal mining requirements.
  • the object of the present invention is to provide a drilling and cutting integration and an oscillating heat injection synergistically strengthening coal seam gas drainage with convenient operation, remarkable anti-reflection effect, and greatly improved gas drainage efficiency. method.
  • the drilling and cutting integration and the oscillating heat injection of the invention synergistically strengthen the gas drainage method of the coal seam, including staggering the hole positions of the heat extraction holes and the common extraction holes in the coal seam, and sequentially constructing common extraction holes and seals.
  • the high-pressure jet cuts the coal body around the heat-extracting hole from the inside to the outside, and forms a plurality of slots in the periphery of the heat-extracting hole; and the method further comprises the following steps:
  • the high temperature gas drainage pipe is built into the heat injection hole, and the wall of the high temperature gas drainage pipe is spaced apart by a plurality of through holes, and the distance between the plurality of holes is equal to the distance between the slots.
  • a steam delivery pipe having a spin-type oscillating pulse jet nozzle mounted at the front end is fed from the inlet of the high temperature resistant gas drainage pipe to the first slot at the bottom of the hole, and the spin oscillating pulse jet nozzle passes through the bearing and the steam
  • the conveying pipeline is connected, and the exposed section of the steam conveying pipeline is connected to the steam generator through the steam conveying pipeline valve, and the multi-turn through holes of the high temperature resistant gas drainage pipe are respectively aligned with the positions of the respective slots, and the heat extraction hole is performed. Sealing of the high temperature gas drainage pipe and passing through the valve with the gas extraction branch pipe
  • the gas drainage branch pipe connects the high temperature resistant gas drainage pipe to the gas drainage main pipe;
  • the spacing between the slots is 0.5 m.
  • the spin-type oscillating pulse jet nozzle comprises a nozzle body, a plurality of jet nozzles disposed on a side of the nozzle body, and the jet nozzle is tangentially connected to a central hole of the nozzle body, and the jet nozzle comprises a nozzle inlet, an oscillating cavity and a nozzle outlet.
  • the nozzle inlet has two stages of wall wall inclination change from the outside to the inside, and the nozzle outlet has a three-stage hole wall dip angle change from the inside to the outside.
  • the outer surface of the hot steam delivery pipe is wrapped with a glass wool material insulation layer.
  • the present invention increases the exposed area of the coal body by slitting, forms a fracture network, improves the pressure relief and permeability range of the single borehole, and improves the single hole gas drainage effect.
  • the hot steam injected into the coal body heats the coal body through the fracture network, reduces the adsorption potential of gas in the coal body, improves the desorption capacity of the gas, and significantly improves the gas drainage effect.
  • the superheated steam forms a oscillating vapor pressure through the spin-oscillation pulse nozzle to promote the expansion and penetration of the crack, and the fracture network can be more fully formed.
  • the pressure relief space formed by the hydraulic slit can significantly increase the contact surface between the coal body and the high temperature steam, and increase the range of action of the hot steam.
  • the invention overcomes the limitation of the single anti-transmission technology, and significantly increases the pressure relief range of the single hole through the hydraulic slitting, forms a fracture network, provides a flow channel for the superheated steam, and the steam temperature and pressure which are changed by the oscillation promotes the coal body.
  • the expansion and penetration of the fissures, through the synergy of the two significantly improve the desorption efficiency of the gas, and achieve efficient extraction of gas.
  • the method has strong practicability, especially for gas control in high gas coal seams with microporosity, low permeability and high adsorption.
  • Figure 1 is a schematic illustration of a specific embodiment of the invention.
  • FIG. 2 is a schematic structural view of a spin-type oscillating pulse jet nozzle.
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
  • FIG. 4 is a schematic view showing the structure of a nozzle inlet of a spin-type oscillating pulse jet nozzle.
  • Fig. 5 is a schematic view showing the structure of a nozzle outlet of a spin-type oscillating pulse jet nozzle.
  • the drilling and cutting integration and the oscillating injection of the present invention synergistically strengthen the coal seam gas drainage method: the steps are as follows:
  • the high temperature gas drainage pipe 10 is built into the heat injection hole 3, and the wall of the high temperature gas drainage pipe 10 is spaced apart by a plurality of through holes, and the distance between the plurality of holes and the slot 5 is The spacing distance is equal, and the steam delivery pipe 8 to which the spin-type oscillating pulse jet nozzle 6 is attached at the front end is fed from the inlet of the high-temperature resistant gas drainage pipe 10 to the position of the first slot 5 at the bottom of the hole, the spin The oscillating pulse jet nozzle 6 is connected to the steam delivery pipe 8 through the bearing 13.
  • the exposed section of the steam delivery pipe 8 is connected to the steam generator 7 via the steam delivery pipe valve 9, and the multi-turn through holes of the high temperature resistant gas drainage pipe 10 are respectively After being aligned with the positions of the slits 5, the sealing holes of the heat-injecting holes 3 and the high-temperature-resistant gas drainage pipe 10 are performed, and the gas-resistant branch pipe 11 equipped with the gas-draining branch pipe valve 12 is used to pump the high-temperature resistant gas.
  • the discharge pipe 10 is in communication with the gas drainage main pipe 14; the spin-type oscillation pulse jet nozzle 6 is as shown in FIG. 2; and includes a nozzle body and two jet nozzles disposed on the side of the nozzle body, as shown in FIG.
  • the jet nozzle is tangentially connected to the center hole of the nozzle body, and the jet nozzle includes The nozzle inlet 6-1, the oscillating cavity 6-2 and the nozzle outlet 6-3, the nozzle inlet 6-1 has a two-stage hole wall inclination change from the outside to the inside, as shown in Fig. 4, the nozzle outlet 6-3 has an inner and outer direction.
  • the three-stage hole wall inclination angle transformation is as shown in FIG. 5; the outer surface of the hot steam delivery pipe 8 is wrapped with a glass wool material insulation layer.
  • the high-temperature resistant gas drainage pipe 10 is provided with a hole having a hole diameter of 0.003 m at a position corresponding to the slit 5.
  • the steam generator 7 is activated, and the steam generator 7 is adjusted with a periodic variation of the output steam temperature of 100 to 500 °C.
  • the superheated steam of 100 to 500 ° C is injected into the injection hole 3 through the steam oscillating jet nozzle 6 through the steam delivery pipe 8, and the periodicity of the steam pressure can be achieved by the high temperature and high pressure air through the spin oscillating pulse jet nozzle 6.
  • the pulsation, the airflow ejected from the nozzle outlet 6-3 has a reaction force to the spin-type oscillating pulse jet nozzle 6, and the tangential component of the reaction force causes the spin-type oscillating pulse jet nozzle 6 to automatically rotate after the jet.
  • the steam generator 7 and the steam delivery pipe valve 9 are closed to stop the heat injection; the spin-type oscillating pulse jet nozzle 6 is connected to the steam delivery pipe 8 through the bearing 13, and the water is installed between the two. Sealing ring

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Nozzles (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法，适用于微孔隙、低渗透、高吸附的煤层区域瓦斯治理。通过钻割一体化技术在注热抽采孔(3)中形成若干缝槽(5)，再通过蒸汽发生器(7)向注热抽采孔(3)压入周期性变温的高压蒸汽，蒸汽通过自旋式振荡脉冲射流喷头(6)形成振荡过热蒸汽，冲击加热煤体。该方法克服了单一增透技术的局限性，通过水力割缝显著增大单孔的卸压范围，形成裂隙网络，为过热蒸汽提供流动通道，而振荡变化的蒸汽温度和压力又促进了煤体裂隙的扩展和贯通，通过二者的协同作用，提高了瓦斯的解吸效率，实现瓦斯的高效抽采。

Description

一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法 技术领域
本发明涉及一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法，尤其适用于煤矿井下微孔隙、低渗透、高吸附的高瓦斯煤层区域瓦斯治理。
背景技术
我国煤层普遍具有瓦斯压力高、含量大、渗透率低、吸附性强的特点，瓦斯抽采难度极大。因此对煤层进行人工增透，增大煤层的透气性，提高瓦斯的预抽率是保障煤矿安全生产的重要途径。
目前，以水力割缝为代表的水利化措施以其高效的卸压增透作用在我国煤矿区域瓦斯治理过程中得到了广泛应用。但是，由于我国煤层地质条件复杂，煤层渗透率低，单一的水力化措施由于水射流切割及高压水冲击破碎能力的限制导致卸压增透效果有限，瓦斯抽采浓度低，抽采周期长，无法满足高强度的煤炭开采要求。
此外，现有的研究成果表明，温度每升高1℃，煤体吸附瓦斯的能力将降低约8％。近年来不少学者提出了煤层注热抽采技术，通过向煤层中注入高温蒸汽提高煤体温度，进而促进瓦斯解吸，但注热形式较为单一，工程应用较少。
发明内容
技术问题：本发明目的是针对现有技术中的存在的问题，提供一种操作方便、增透效果显著、能大幅提高瓦斯抽采效率的钻割一体化与振荡注热协同强化煤层瓦斯抽采方法。
技术方案：本发明的钻割一体化与振荡注热协同强化煤层瓦斯抽采方法，包括在煤层中交错布置注热抽采孔和普通抽采孔的孔位，依次施工普通抽采孔、封孔、联入瓦斯抽放干管进行瓦斯抽采；然后逐一施工注热抽采孔，利用钻机在注热抽采孔的孔位处钻进直至穿过煤层顶板1m处，退钻，再用高压射流由内而外间隔切割注热抽采孔周围的煤体，在注热抽采孔的外围形成若干缝槽；其特征在于，还包括如下步骤：
a.向注热抽采孔内置入耐高温瓦斯抽放管，耐高温瓦斯抽放管的管壁上间隔开有多圈通孔，多圈通孔的间隔距离与缝槽的间隔距离相等，将前端部安装有自旋式振荡脉冲射流喷头的蒸汽输送管道从耐高温瓦斯抽放管的入口处送入孔底部的首个缝槽处，所述自旋式振荡脉冲射流喷头通过轴承与蒸汽输送管道相连，蒸汽输送管道的外露段经蒸汽输送管道阀门与蒸汽发生器相连，将耐高温瓦斯抽放管的多圈通孔分别与各缝槽的位置对齐后，进行注热抽采孔和耐高温瓦斯抽放管的封孔，并通过装有瓦斯抽采支管阀门的 瓦斯抽采支管将耐高温瓦斯抽放管与瓦斯抽放干管相连通；
b.关闭蒸汽输送管道阀门，打开瓦斯抽采支管阀门，通过瓦斯抽采支管抽采瓦斯；
c.待注热抽采孔内瓦斯浓度低于30％时，关闭瓦斯抽采支管阀门，打开蒸汽输送管道阀门；
d.启动蒸汽发生器，通过蒸汽输送管道向注热抽采孔内注入100～500℃的过热蒸汽，持续1～2h后，关闭蒸汽发生器和蒸汽输送管道阀门，停止注热；
e.打开瓦斯抽采支管阀门，再对注热抽采孔进行瓦斯抽采；
f.重复步骤c、d和e多次，当注热抽采孔的瓦斯浓度始终低于30％时，将蒸汽输送管道向注热抽采孔孔口方向移动，使自旋式振荡脉冲射流喷头移至相邻的下一个缝槽的位置处；
g.重复步骤d、e和f，完成注热抽采孔内的振荡注热协同强化煤层瓦斯抽采。
所述缝槽之间的间距为0.5m。
所述的自旋式振荡脉冲射流喷头包括喷头体、设在喷头体侧面上的多个射流喷嘴，射流喷嘴与喷头体中心孔切向相连，射流喷嘴包括喷嘴入口、振荡腔体和喷嘴出口，喷嘴入口由外向内有两级孔壁倾角变换，喷嘴出口由内向外有三级孔壁倾角变换
所述的热蒸汽输送管道的外表面上包裹有玻璃棉材料保温层。
有益效果：本发明通过割缝增大煤体的暴露面积，形成裂隙网络，提高单个钻孔的卸压增透范围，改善单孔瓦斯抽采效果。同时，注入煤体的热蒸汽通过裂隙网络加热煤体，降低瓦斯在煤体中的吸附势，提高瓦斯的解吸能力，显著改善瓦斯抽采效果。同时过热蒸汽经过自旋式振荡脉冲喷嘴形成振荡变化的蒸汽压力促进裂纹的扩展和贯通，能够更充分地形成裂隙网络。此外，水力割缝形成的卸压空间能够显著增大煤体与高温蒸汽的接触面，增大热蒸汽的作用范围。本发明克服了单一增透技术的局限性，通过水力割缝显著增大单孔的卸压范围，形成裂隙网络，为过热蒸汽提供流动通道，而振荡变化的蒸汽温度和压力又促进了煤体裂隙的扩展和贯通，通过二者的协同作用，显著提高了瓦斯的解吸效率，实现瓦斯的高效抽采。该方法成实用性强，尤其对于微孔隙、低渗透、高吸附的高瓦斯煤层区域瓦斯治理具有广泛的应用前景。
附图说明
图1是本发明的具体实施方法示意图。
图2是自旋式振荡脉冲射流喷头的结构示意图。
图3是图2中A-A方向的剖视图。
图4是自旋式振荡脉冲射流喷头的喷嘴入口结构示意图。
图5是自旋式振荡脉冲射流喷头的喷嘴出口结构示意图。
图中：1－煤层；2－煤层顶板；3－注热抽采孔；4－普通抽采孔；5－缝槽；6－自旋式振荡脉冲射流喷头；6-1－喷嘴入口；6-2－振荡腔体；6-3－喷嘴出口；7－蒸汽发生器；8－热蒸汽输送管道；9－蒸汽输送管道阀门；10－耐高温瓦斯抽放管；11－瓦斯抽采支管；12－瓦斯抽采支管阀门；13－轴承；14－瓦斯抽放干管。
具体实施方式
下面结合附图对本发明的一个实施例作进一步的描述：
如图1所示，本发明的钻割一体化与振荡注热协同强化煤层瓦斯抽采方法：具休步骤如下：
a.在煤层1中交错布置注热抽采孔3和普通抽采孔4的孔位，依次施工普通抽采孔4、封孔、联入瓦斯抽放干管14进行瓦斯抽采；然后逐一施工注热抽采孔3，利用钻机在注热抽采孔3的孔位处钻进直至穿过煤层顶板2一米处，退钻，再用高压射流由内而外间隔切割注热抽采孔3周围的煤体，在注热抽采孔3的外围形成若干缝槽5，缝槽5之间的间距为0.5m；
b.向注热抽采孔3内置入耐高温瓦斯抽放管10，耐高温瓦斯抽放管10的管壁上间隔开有多圈通孔，多圈通孔的间隔距离与缝槽5的间隔距离相等，将前端部安装有自旋式振荡脉冲射流喷头6的蒸汽输送管道8从耐高温瓦斯抽放管10的入口处送入孔底部的首个缝槽5位置处，所述自旋式振荡脉冲射流喷头6通过轴承13与蒸汽输送管道8相连，蒸汽输送管道8的外露段经蒸汽输送管道阀门9与蒸汽发生器7相连，将耐高温瓦斯抽放管10的多圈通孔分别与各缝槽5的位置对齐后，进行注热抽采孔3和耐高温瓦斯抽放管10的封孔，并通过装有瓦斯抽采支管阀门12的瓦斯抽采支管11将耐高温瓦斯抽放管10与瓦斯抽放干管14相连通；所述的自旋式振荡脉冲射流喷头6如图2所示；包括喷头体、设在喷头体侧面上的2个射流喷嘴，如图3所示，射流喷嘴与喷头体中心孔切向相连，射流喷嘴包括喷嘴入口6-1、振荡腔体6-2和喷嘴出口6-3，喷嘴入口6-1由外向内有两级孔壁倾角变换，如图4所示，喷嘴出口6-3由内向外有三级孔壁倾角变换，如图5所示；所述的热蒸汽输送管道8的外表面上包裹有玻璃棉材料保温层。所述耐高温瓦斯抽放管10与缝槽5相对应位置开设的孔直径为0.003m的孔眼。
c.关闭蒸汽输送管道阀门9，打开瓦斯抽采支管阀门12，通过瓦斯抽采支管11抽采瓦斯；
d.待注热抽采孔3内瓦斯浓度低于30％时，关闭瓦斯抽采支管阀门12，打开蒸汽输送管道阀门9；
e.启动蒸汽发生器7，蒸汽发生器7采用输出蒸汽温度100～500℃的周期性变化调节。通过蒸汽输送管道8经自旋式振荡脉冲射流喷头6向注热抽采孔3内注入100～500℃的过热蒸汽，高温高压空气通过自旋式振荡脉冲射流喷头6可实现蒸汽压力的周期性脉动，喷嘴出口6-3喷出的气流对自旋式振荡脉冲射流喷头6有一个反作用力，该反作用力的切向分力可使自旋式振荡脉冲射流喷头6在喷气后自动旋转。持续1～2h后，关闭蒸汽发生器7和蒸汽输送管道阀门9，停止注热；所述自旋式振荡脉冲射流喷头6通过轴承13与蒸汽输送管道8相连，且两两之间安装有防水密封圈；
f.打开瓦斯抽采支管阀门12，再对注热抽采孔3进行瓦斯抽采；
g.重复步骤d、e和c多次，待注热抽采孔3的瓦斯浓度始终低于30％时，将蒸汽输送管道8向注热抽采孔3孔口方向移动，使自旋式振荡脉冲射流喷头6移至相邻的下一个缝槽5的位置处；
h.重复步骤e、f和g，完成注热抽采孔3内的振荡注热协同强化煤层瓦斯抽采。

Claims (4)

  1. 一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法，包括在煤层(1)中交错布置注热抽采孔(3)和普通抽采孔(4)的孔位，依次施工普通抽采孔(4)、封孔、联入瓦斯抽放干管(14)进行瓦斯抽采；然后逐一施工注热抽采孔(3)，利用钻机在注热抽采孔(3)的孔位处钻进直至穿过煤层顶板(2)1m处，退钻，再用高压射流由内而外间隔切割注热抽采孔(3)周围的煤体，在注热抽采孔(3)的外围形成若干缝槽(5)；其特征在于，还包括如下步骤：
    a.向注热抽采孔(3)内置入耐高温瓦斯抽放管(10)，耐高温瓦斯抽放管(10)的管壁上间隔开有多圈通孔，多圈通孔的间隔距离与缝槽(5)的间隔距离相等，将前端部安装有自旋式振荡脉冲射流喷头(6)的蒸汽输送管道(8)从耐高温瓦斯抽放管(10)的入口处送入孔底部的首个缝槽(5)处，所述自旋式振荡脉冲射流喷头(6)通过轴承(13)与蒸汽输送管道(8)相连，蒸汽输送管道(8)的外露段经蒸汽输送管道阀门(9)与蒸汽发生器(7)相连，将耐高温瓦斯抽放管(10)的多圈通孔分别与各缝槽(5)的位置对齐后，进行注热抽采孔(3)和耐高温瓦斯抽放管(10)的封孔，并通过装有瓦斯抽采支管阀门(12)的瓦斯抽采支管(11)将耐高温瓦斯抽放管(10)与瓦斯抽放干管(14)相连通；
    b.关闭蒸汽输送管道阀门(9)，打开瓦斯抽采支管阀门(12)，通过瓦斯抽采支管(11)抽采瓦斯；
    c.待注热抽采孔(3)内瓦斯浓度低于30％时，关闭瓦斯抽采支管阀门(12)，打开蒸汽输送管道阀门(9)；
    d.启动蒸汽发生器(7)，通过蒸汽输送管道(8)向注热抽采孔(3)内注入100～500℃的过热蒸汽，持续1～2h后，关闭蒸汽发生器(7)和蒸汽输送管道阀门(9)，停止注热；
    e.打开瓦斯抽采支管阀门(12)，再对注热抽采孔(3)进行瓦斯抽采；
    f.重复步骤c、d和e多次，当注热抽采孔(3)的瓦斯浓度始终低于30％时，将蒸汽输送管道(8)向注热抽采孔(3)孔口方向移动，使自旋式振荡脉冲射流喷头(6)移至相邻的下一个缝槽(5)的位置处；
    g.重复步骤d、e和f，完成注热抽采孔(3)内的振荡注热协同强化煤层瓦斯抽采。
  2. 根据权利要求1所述的一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法，其特征在于：所述缝槽(5)之间的间距为0.5m。
  3. 根据权利要求1所述的一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法，其特征在于：所述的自旋式振荡脉冲射流喷头(6)包括喷头体、设在喷头体侧面上的多个射流喷嘴，射流喷嘴与喷头体中心孔切向相连，射流喷嘴包括喷嘴入口(6-1)、振荡腔体(6-2)和喷嘴出口(6-3)，喷嘴入口(6-1)由外向内有两级孔壁倾角变换，喷嘴出口(6-3)由内向外有三级孔壁倾角变换。
  4. 根据权利要求1所述的一种钻割一体化与振荡注热协同强化煤层瓦斯抽采方法，其特征在于：所述的热蒸汽输送管道(8)的外表面上包裹有玻璃棉材料保温层。
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