WO2013159716A1 - Procédé de prévention et de commande d'éruption de gaz - Google Patents

Procédé de prévention et de commande d'éruption de gaz Download PDF

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Publication number
WO2013159716A1
WO2013159716A1 PCT/CN2013/074710 CN2013074710W WO2013159716A1 WO 2013159716 A1 WO2013159716 A1 WO 2013159716A1 CN 2013074710 W CN2013074710 W CN 2013074710W WO 2013159716 A1 WO2013159716 A1 WO 2013159716A1
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WO
WIPO (PCT)
Prior art keywords
gas
coal
auger
pressure value
drilling
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Application number
PCT/CN2013/074710
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English (en)
Chinese (zh)
Inventor
陈凤平
韩国伟
曹海华
Original Assignee
Chen Fengping
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chen Fengping filed Critical Chen Fengping
Publication of WO2013159716A1 publication Critical patent/WO2013159716A1/fr

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Classifications

    • 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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/003—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by analysing drilling variables or conditions

Definitions

  • the invention relates to a safe production technology in the field of coal mining, and in particular to a method for preventing and controlling gas outburst. Background technique
  • Coal and gas outburst means that in the coal mining operation under the coal mine, under the action of the pressure difference, the broken coal and gas are suddenly ejected from the coal seam body to the mining space, which is another type of gas. phenomenon. It is extremely destructive.
  • Coal and gas outbursts have outstanding time uncertainty, and the uncertainty of the location is prominent.
  • the prominent location may be the coal roadway face, or the mining face, and sometimes the roadway maintenance and expansion.
  • the gas may be tens of cubic meters, or millions of cubic meters.
  • the protruding coal (rock) may be several tons, several tens of tons, or even thousands of tons, or even tens of thousands of tons.
  • the object of the present invention is to provide a method for preventing and controlling gas outburst, which can detect, eliminate, and eliminate the physical explosion hazard of gas enthalpy in the coal seam simply, accurately, reliably, and efficiently, and avoid the harm caused by gas outburst to the life and property of the miner.
  • the present invention provides a method for preventing gas outburst, comprising:
  • Step one drilling a detection hole in the surface of the coal wall of the roadway
  • Step 2 pressing a pressure detecting rod to press the surface of the coal wall to obtain a first pressure value, and pressing the bottom of the detecting hole by the pressure detecting rod to obtain a second pressure value; if the first pressure value is subtracted The result obtained after the second pressure value is greater than a predetermined threshold value, and the detection hole is a dangerous area where gas enthalpy exists;
  • Step three drilling a gas raft into the dangerous area through an auger
  • Step 4 stopping the feeding of the auger rod and fixing the position after drilling the predetermined depth of the gas raft, and transferring the gas and the pulverized coal in the gas raft to the coal gas separator by the rotation of the auger rod;
  • Step 5 The coal gas separator discharges the coal powder through a pulverized coal discharge pipe, and discharges gas into a special pumping pipe or a return air passage through a gas discharge pipe.
  • the above prevention and treatment method further includes:
  • Step 6 detecting, by the detecting device, a gas concentration value of the gas discharge pipe, wherein the gas concentration value is less than the concentration safety value and the discharge amount of the pulverized coal discharge pipe is less than the discharge safety value, The prevention process is over.
  • the flow rate of the gas and the pulverized coal is controlled by controlling the rotational speed of the spiral drill pipe.
  • whether the gas enthalpy is drilled is determined by the bit pressure value of the auger or the feed resistance value of the auger;
  • the predetermined depth is 0.3 to 1.5 meters.
  • the auger shaft is a hollow drill pipe having a central passage through which the bit dust-reducing water is supplied.
  • the method further comprises: determining a range of the gas enthalpy by providing a plurality of detecting holes.
  • the method before the step 1, the method further comprises: setting a ventilation system, a water supply system, and a steel structure to avoid the external charging operation.
  • the portion where the detection hole is drilled is located at a portion where the thickness of the coal seam is abrupt, a portion where the coal seam is originally misaligned, or a portion where the coal seam is coal-packed.
  • the depth of the detection hole is determined according to the thickness of the coal seam, the type of the coal seam, and the depth of the mining footage.
  • the coal gas separator is disposed on the auger shaft and is pressed and fixed by a pressing device.
  • the relative pressure difference is detected by the corresponding detecting holes drilled in advance, because the normal coal seam is a plastomer, and the interior of the gas raft is a gas-solid mixed elastomer, and the pressure of the plastomer coal layer on the detecting rod is It is much larger than the gauge pressure of the inner elastic body on the probe rod. Therefore, by comparing whether the pressure on the surface of the coal wall and the bottom of the probe hole is abrupt, it is possible to detect whether or not there is gas enthalpy.
  • the detection method is convenient, accurate, simple and effective.
  • the invention drills into the gas raft through the auger rod, because the auger rod rotates and travels, so that the gas enthalpy does not directly communicate with the outside, and does not cause gushing.
  • the auger can be used as a conveyor to safely and controlfully discharge the gas gradually, avoiding gas explosion, safe and reliable.
  • the invention avoids the risk of gas combustion and explosion by stopping the live working, and the safety of the personnel is ensured by the steel structure avoiding.
  • the portion of the invention for drilling the detecting hole is located at: a portion where the thickness of the coal seam is abrupt, a portion where the coal seam is originally misaligned, or a portion where the coal seam is coal-packed. Because these parts are areas where gas enthalpy is easily present, the chance of finding a gas raft quickly is increased.
  • Figure 2 is a structural view of an "anti-burst detecting device" employed in the method of the present invention
  • Figure 3 is a structural view of an "anti-burst device” for implementing the method of the present invention.
  • the present invention finds through the simulation experiments that the true phenomenon of gas explosion in the world mining industry for more than 100 years is that the outer shell of the same age as the coal seam and the raw material to be present in the coal seam is irregularly curved pear. Type or duck-shaped shape of the scorpion, its depth of expression is expressed more than 30m (internal pressure reaches 0.75MPa or more) There will be a physical explosion hazard.
  • Gas rafts may have multiple coal seams and multiple mines, and the distribution is irregular. It is randomly hidden in the coal seams where the coal seams are relatively thick or suddenly thickened, especially in the areas where the coal seams suddenly become thick and coal seams. The original misplacement causes the gap between the top and bottom plates to increase, and the thickened portion of the coal seam and the coal-clad portion of the coal seam are more dangerous places hidden by gas.
  • the wall of the gas clam shell is as delicate as the eggshell, and it has a strong sealing. If the coal seam and the top and bottom plates are not damaged, the wall thickness of the clam shell is always greater than the minimum limit wall thickness of the physical explosion, and it can be adjacent to the plasticity. Under the equilibrium of the same pressure (ground stress), the coal seam will last for thousands of years. Invasion is not only filled with gas (or carbon dioxide), but also filled with a coal-like solidified body that is entangled with the gas stream as it is squeezed.
  • the mixture of ⁇ Nevas (or carbon dioxide) and coal solidified body not only has physical explosion characteristics under the action of ground stress (gravity), but also has slits for the cracks above the thickness of the protruding shell wall and the conventional anti-burst drilling.
  • the blasting self-sealing function which is also the traditional anti-burst technology has been very close to the truth of the gas, but failed to uncover its mysterious veil, but passed away with the gas, not only did not eliminate the gas outburst accident in the bud In the state, it has caused countless gas accidents with serious losses.
  • the control of coal and gas outburst not only tests the wisdom of civilization, but also is a severe challenge faced by all civilization for more than 100 years.
  • FIG. 1 is a flow chart of the steps of a method according to an embodiment of the present invention. As shown in FIG. 1 , an embodiment of the present invention provides a method for preventing and controlling gas outburst, including:
  • Step 101 drilling a detection hole in a surface of a coal wall of the roadway
  • Step 102 Pressing a pressure detecting rod to press the surface of the coal wall to obtain a first pressure value, and pressing the bottom of the detecting hole by the pressure detecting rod to obtain a second pressure value; if the first pressure value is subtracted The result obtained after the second pressure value is greater than a predetermined threshold value, The detection hole is a dangerous area where gas enthalpy exists;
  • Step 103 drilling a gas raft into the dangerous area through an auger
  • Step 104 stopping the feeding of the auger rod after drilling a predetermined depth of the gas, and transferring the gas and coal powder in the gas to the coal gas separator by the rotation of the auger;
  • Step 105 The coal gas separator discharges the coal powder through a pulverized coal discharge pipe, and discharges gas into a special pumping pipe or a return air passage through a gas discharge pipe.
  • the invention detects the relative pressure difference through the corresponding detection holes drilled in advance, because the normal coal seam is a plastomer, and the interior of the gas raft is a gas-solid mixed elastomer, and the viscous coal seam is on the gauge pressure of the probe. It is much larger than the gauge pressure of the inner elastic body on the probe rod. Therefore, by comparing whether the pressure on the surface of the coal wall and the bottom of the probe hole is abrupt, it is possible to detect whether or not there is gas enthalpy.
  • the present invention drills into the gas raft through the auger rod, because the auger rod rotates and travels so that the gas enthalpy does not directly communicate with the outside, and does not cause gushing.
  • the auger can be used as a conveyor to safely and controlfully discharge the gas gradually, avoiding gas spurting, safe and effective.
  • the gas concentration value of the gas discharge pipe may be detected by the detecting device, wherein the gas concentration value is less than the concentration safety value and the discharge amount of the pulverized coal discharge pipe is less than the discharge safety value, explain that the gas has been safely drained, and the prevention and control process for gas hazards can be ended.
  • the flow rate of the gas and the pulverized coal can be controlled by controlling the rotational speed of the auger.
  • step 103 whether the gas enthalpy is drilled by the bit pressure value of the auger rod or the feed resistance value of the auger rod; in the step 104, drilling into the gas raft
  • the predetermined depth may be 0.3 to 1.5 meters.
  • the auger shaft is a hollow drill pipe having a central passage through which the bit is used to supply dust reduction water.
  • the method further comprises: determining a range of the gas enthalpy by setting a plurality of detecting holes.
  • the method further includes: setting a ventilation system, a water supply system, and a steel structure to avoid the external charging operation.
  • the live working is stopped to avoid gas explosion and explosion.
  • the steel structure is used to protect people's safety.
  • the portion where the detecting hole is drilled is located at: a portion where the thickness of the coal seam is abrupt, a portion where the coal seam is originally misaligned, or a portion where the coal seam is coal-packed. Because these parts are parts that are prone to gas enthalpy.
  • the depth of the detecting hole is determined according to the thickness of the coal seam, the type of the coal seam and the depth of the mining footage.
  • the "anti-burst detecting device” includes: a detecting hole 1, a detecting rod 2, a cylinder rod 3, a cylinder 4, Bracket holder 5, adjustable horizontal bracket 6, hydraulic oil pipe 7, hydraulic oil tank 8, distribution valve 9, lever 10, pressure gauge 1 1 , hydraulic pump 1 2, coupling 13, motor 14, base 15, lower bracket 16 , roadway coal wall 17.
  • the detection process is: Using the "anti-burst detection device", the relative pressure difference is detected by the absolute pressure difference detection method through the corresponding impingement hole drilled in advance, and the relative pressure difference is detected. Because the normal coal seam is a plastomer, and the interior of the gas raft is a gas (gas) solid (coal) mixed elastomer, so at the same depth, the frictional force (gauge pressure) of the plastid coal seam on the probe is far greater. The friction force (gauge pressure) of the elastomer on the probe rod in the crucible. If the above-mentioned situation is found in a certain exploration hole or multiple exploration holes during the anti-surge detection operation, it can be determined that there is gas ⁇ inside the coal in the exploration hole, and otherwise, no gas ⁇ exists.
  • the "anti-burst device” includes: a detecting hole 31, a drill bit 32, a discharge hole 33, and a drill pipe 34.
  • a discharge hole sealing support device 35 a spray nozzle 36, a coal gas separator 37, a pressing device 38, a guide sleeve 39, a drill rod driver 310, a speed reducer 31 1 , a drive motor 312, a slide base 313, a feed device 314, handle 315, cable 316, horizontal bracket 317, screw bracket seat 318, lift adjuster 319, rear bracket 320, guide rail 321, adjustable front bracket 322, pulverized coal discharge pipe 323, gas drainage pipe 324, gas detection Instrument 325.
  • the method is to use the principle of spiral braking to (Gas) solid (coal) mixture, in the quantitative discharge of auger, with water spray and dust concentration, gas concentration monitoring, dust-free coal (rock) and high-concentration gas diversion, respectively, are discharged as required, coal (rock It can be directly loaded into the mine to be transported out of the wellhead; the gas flow can be discharged into a dedicated gas drainage pipeline or introduced into the atmospheric airflow.
  • the method for preventing and controlling gas outburst of the present invention is as follows: Firstly, according to the thickness of the coal seam to be protected, the spacing of the probe holes and the depth of the borehole are determined, and then the area of the coal pressure is determined by the "anti-burst detection device" (exploration) After the maximum pressure value, connect the probe rod to the bottom of the hole, and then carry out controlled pressurization. If the maximum pressure value at the bottom of the probe is not significantly different from the measured pressure value, and the jacking is difficult, then the probe There is no gas ⁇ inside the pore coal seam.
  • the maximum pressure value at the bottom of the hole is very different from the measured pressure value, and the probe is pushed in and labor-saving, it can be determined that there is gas enthalpy inside the coal seam and there is a danger of physical explosion (protrusion). If no gas enthalpy is found in one of the detection holes detected by the mining operation, the mining operation can perform normal mining activities and carry out the next round of anti-burst detection steps under the requirements of the protection specification. If during the drilling process, it is found that there is gas enthalpy inside the coal seam, and after determining the size of the carcass, it is necessary to use the "anti-burst drilling device" to control the pressure relief by the pressure relief drill (physical explosion). eliminate.
  • the elastic pressure inside the gas raft is reduced to a normal pressure state, thereby eliminating the risk of protrusion (physical explosion).
  • the purpose of the contact absolute pressure difference detection and drilling method is to increase the accuracy of the outburst to 100% and to reduce the (physical explosion) accident to zero. While ensuring safe production, it will fundamentally eliminate gas outburst accidents, greatly reduce traditional anti-burst costs, simplify the spin-spin procedure, and improve the economic benefits of prominent mines.
  • the specific steps of the protrusion prevention are:
  • the specifications are: DYL-50-100-800, DYL-50-113-800, DYL-50-125-800, etc., in the orientation of the guide head, the water injection hole is expanded The hole is drilled and stops when the auger is drilled to the inside of the known gas raft wall by 0.5 m. Then the drill pipe is disconnected at the position of the diverter, the sealing joint is connected, the starting device rotates the drill pipe, but the feed pipe is not fed. At this time, the auger drill pipe becomes a screw returning machine, and the gas is officially entered into the gas discharge. Pressure discharge operation.
  • the water supply at the top of the drill pipe can not be interrupted during drilling and discharge; the water supply spray inside the diverter can not be interrupted during discharge; the discharge must be through a small explosion-proof axial flow fan, which will be highly concentrated ( 100%) Gas is introduced into a dedicated drainage pipe or introduced into the return air passage through a dedicated air duct.
  • the embodiments of the present invention have the following advantages:
  • the invention detects the relative pressure difference through the corresponding detection holes drilled in advance, because the normal coal seam is a plastomer, and the interior of the gas raft is a gas-solid mixed elastomer, and the viscous coal seam is on the gauge pressure of the probe rod. It is much larger than the gauge pressure of the inner elastic body on the probe rod. Therefore, by comparing whether the pressure on the surface of the coal wall and the bottom of the probe hole is abrupt, it is possible to detect whether or not there is gas enthalpy.
  • the detection method is convenient, accurate, simple and effective.
  • the invention drills into the gas raft through the auger rod, because the auger rod rotates and travels, so the gas raft does not directly communicate with the outside world, and does not cause gushing.
  • the auger pipe can be used as a conveyor to safely and controlfully discharge the gas gradually, avoiding gas spraying. Surge, safe and reliable.
  • the invention avoids the risk of gas combustion and explosion by stopping the live working, and the safety of the personnel is ensured by the steel structure avoiding.
  • the portion of the invention for drilling the detecting hole is located at: a portion where the thickness of the coal seam is abrupt, a portion where the coal seam is originally misaligned, or a portion where the coal seam is coal-packed. Because these parts are areas where gas enthalpy is easily present, the chance of finding a gas raft quickly is increased.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Earth Drilling (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention porte sur un procédé de prévention et de commande d'éruption de gaz, lequel procédé met en œuvre : le forage d'un trou de détection sur la surface de paroi de charbon d'un tunnel ; l'acquisition d'une première valeur de pression de la surface de paroi de charbon et d'une seconde valeur de pression du fond du trou de détection ; si le résultat obtenu après la soustraction de la seconde valeur de pression à partir de la première valeur de pression est supérieure à un seuil préétabli, alors, le site du trou de détection étant une zone dangereuse ayant une poche de gaz ; le forage dans la poche de gaz dans la zone dangereuse avec une tige à vis sans fin ; après le forage jusqu'à une profondeur prédéterminée dans la poche de gaz, l'arrêt de l'avance de la tige à vis sans fin et la fixation de la position ; le transport de gaz et de poussière de charbon dans la poche de gaz dans un séparateur charbon-gaz à l'aide de la rotation de la tige à vis sans fin ; le déchargement par le séparateur charbon-gaz de la poussière de charbon par l'intermédiaire d'un tuyau de décharge de poussière de charbon, et le déchargement du gaz dans un tuyau de pompage exclusif ou une voie d'air de retour par l'intermédiaire d'un tuyau de décharge de gaz. Le présent procédé peut détecter de façon simple, sure, fiable et efficace une poche de gaz dans un lit de charbon, et éliminer le danger caché d'une explosion physique, de façon à éviter ainsi un risque pour les vies de mineurs et pour des biens, provoqué par une éruption de gaz.
PCT/CN2013/074710 2012-04-28 2013-04-25 Procédé de prévention et de commande d'éruption de gaz WO2013159716A1 (fr)

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CN201210132669.7A CN102635391B (zh) 2012-04-28 2012-04-28 瓦斯突出的防治方法
CN201210132669.7 2012-04-28

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CN102635391B (zh) * 2012-04-28 2014-02-12 陈凤平 瓦斯突出的防治方法
CN103195473B (zh) * 2013-03-06 2015-04-29 中煤科工集团重庆研究院有限公司 矿井防突措施效果分析方法
CN103969133B (zh) * 2014-04-24 2016-08-24 陈凤平 一种煤层应力的综合检测方法
CN105909299A (zh) * 2016-04-19 2016-08-31 陈凤平 煤层势能体物理爆炸的防治方法
CN106703698A (zh) * 2016-12-05 2017-05-24 泰尔达能源科技（北京）有限公司 煤矿井下自动钻孔装置及方法
CN107035403B (zh) * 2016-12-13 2019-06-04 中铁隧道集团有限公司 一种高瓦斯及瓦斯突出隧道非防爆无轨运输方法
CN110656973B (zh) * 2019-11-08 2021-05-18 湖南科技大学 一种矿井瓦斯涌出的防治方法
CN112832846B (zh) * 2021-02-05 2023-03-14 枣庄科技职业学院 一种用于抽采煤矿老采空区瓦斯的抽采装置及其抽采方法

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