CN109779677B

CN109779677B - Gas treatment process

Info

Publication number: CN109779677B
Application number: CN201910023670.8A
Authority: CN
Inventors: 刘德成; 刘珂
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2021-03-02
Anticipated expiration: 2039-01-10
Also published as: CN109779677A

Abstract

The invention provides a gas treatment process, which comprises the following steps: step S1, determining the arrangement mode and parameters of the blast holes and the extraction control holes according to the coal seam parameters; step S2, drilling an extraction control hole according to the arrangement mode and parameters and performing screen pipe connection extraction; step S3, constructing the blast hole in time after the construction of the extraction control hole is finished and the combined extraction is realized, and charging the explosive according to the hole forming condition immediately after the blast hole is constructed and a drilling tool is taken out; and step S4, sealing holes and blasting, wherein the coal seam parameters comprise coal seam occurrence, coal seam gas pressure, coal seam air permeability coefficient, coal firmness coefficient and coal seam gas adsorption condition. According to the gas treatment process provided by the invention, the drilling construction quality is ensured to meet the requirements of extraction control holes, blasting hole sieve tubes and charge according to the factors such as coal seam occurrence, coal seam gas pressure, coal seam permeability coefficient, coal firmness coefficient and coal seam gas adsorption condition.

Description

Gas treatment process

Technical Field

The invention relates to the technical field of gas treatment, in particular to a gas treatment process.

Background

Along with the increase of the mining depth, the gas content and the pressure of the coal bed, the low gas mine is changed into a high gas mine, and the high gas mine is changed into a coal and gas outburst mine.

Coal (rock) and gas outburst are common complex power phenomena in the coal mine production process. China is the most serious country in the world, and coal (rock) and gas outburst has become one of the main threats to coal mine safety production in China.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of the above, the present invention provides a gas treatment process.

In order to achieve the purpose, the technical scheme of the invention provides a gas treatment process, which comprises the following steps: step S1, determining the arrangement mode and parameters of the blast holes and the extraction control holes according to the coal seam parameters; step S2, drilling an extraction control hole according to the arrangement mode and parameters and performing screen pipe connection extraction; step S3, constructing the blast hole in time after the construction of the extraction control hole is finished and the combined extraction is realized, and charging the explosive according to the hole forming condition immediately after the blast hole is constructed and a drilling tool is taken out; and step S4, sealing holes and blasting, wherein the coal seam parameters comprise coal seam occurrence, coal seam gas pressure, coal seam air permeability coefficient, coal firmness coefficient and coal seam gas adsorption condition.

According to the scheme, reasonable extraction control holes, blast hole design, a drilling construction slag discharging mode and a hole protecting measure are provided according to factors such as coal seam occurrence, coal seam gas pressure, coal seam gas permeability coefficient, coal firmness coefficient and coal seam gas adsorption condition, the drilling depth, the control range and the gas control range are guaranteed to meet requirements of 2009 'regulations for preventing and controlling coal and gas outburst', the hole sealing length and the blast hole arrangement meet requirements of technical conditions for controlling presplitting blasting of underground coal mine deep holes (MT1036-2007), meanwhile, the drilling construction quality is guaranteed to meet requirements of extraction control holes, screen pipes and requirements for blasting holes, and further the problem of gas outburst can be solved.

In the foregoing technical solution, preferably, step S3 specifically includes: step S31, drilling blast holes according to the arrangement mode and the parameters; and step S32, determining the firmness coefficient of the coal seam, and when the firmness coefficient is greater than a preset value, charging the blast hole by using an external bus or internal bus charging process, or else, charging the blast hole by using a double-bus charging process.

In any of the above technical solutions, preferably, step S4 specifically includes: step S41, sealing the blast hole by using mining compressed air sealing equipment; and step S42, blasting the blast hole.

In any one of the above technical solutions, preferably, the mining compressed air sealing device includes: the lower side of the tank body is provided with a conical part, and the upper part of the tank body protrudes outwards to form an air inlet and a feed inlet; the material conveying pipe is communicated with the lower end of the conical part through a discharge valve; the sealing cover is detachably arranged at the feed inlet; the pressure gauge is fixedly arranged on the tank body, the detection end of the pressure gauge is communicated with the tank body, and the radius of the conical part is gradually reduced from top to bottom.

In this scheme, at first close the bleeder valve, open the feed inlet afterwards, it is internal to put into the jar with the hole sealing material, reinforced back that finishes, sealed lid seals the feed inlet and closes the pressure release valve, opens the air supply mouth, and the internal pressure of jar risees gradually, when the internal pressure of jar risees to predetermineeing numerical value, closes the air inlet, opens the bleeder valve, and the hole sealing material pours into downthehole into under the effect of the internal and external pressure differential of jar to seal the hole. And then opening the pressure relief valve, closing the feeding valve after the air pressure inside and outside the tank body is balanced, opening the feeding hole, and repeating the steps until the hole sealing operation is completed.

In this scheme, be convenient for operating personnel to master the internal pressure of jar in real time through setting up the manometer to can reduce the possibility of the internal pressure of jar too big or undersize. Meanwhile, the operation difficulty can be reduced, and the method is convenient for large-scale popularization. It should also be noted that the safety of the hole sealing operators is improved by arranging the pressure relief valve and the pressure gauge at the same time.

When still pointing out, through setting up the manometer, operating personnel can adjust jar internal atmospheric pressure to different pressure values, and the technical staff of being convenient for can be according to the internal pressure of regulation jar such as hole sealing material and aperture of difference, and mining compressed air sealing equipment hole sealing material in this scheme is not single promptly, can be for cement, yellow sand, waste rock powder, fly ash and clay, is convenient for draw materials on the spot, low cost, and the suitability is better, has solved current compressed air sealing equipment hole sealing material singleness, the not strong problem of adaptability.

The holes in the scheme include but are not limited to gas extraction drill holes, gas pressure measuring holes and deep hole blasting holes.

In the above technical solution, preferably, the sealing cover is detachably provided with a pressure relief valve.

In any one of the above technical solutions, preferably, one of the sealing cover and the pressure relief valve is provided with a first external thread, and the other one of the sealing cover and the pressure relief valve is provided with a first internal thread, so that the sealing cover and the pressure relief valve can be detachably connected through the matching of the first external thread and the first internal thread.

In any of the above technical solutions, preferably, a rotating handle is fixedly arranged on one side of the sealing cover away from the tank body.

In any of the above technical solutions, preferably, one of the tank body and the sealing cover is provided with a second external thread, and the other is provided with a second internal thread, and the sealing connection of the sealing cover at the feed inlet is realized through the matching of the second external thread and the second internal thread.

In any of the above technical solutions, preferably, the method further includes: the support sets firmly on the jar body, and a plurality of supports lean on with ground to support the jar body.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a mining compressed air sealing device according to one embodiment of the invention;

fig. 2 is a schematic structural diagram of the mining compressed air sealing device according to one embodiment of the invention;

fig. 3 is a schematic structural diagram of a roadway according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

the device comprises a pressure release valve 1, a sealing cover 2, a feed inlet 3, an air inlet 4, a tank body 5, a pressure gauge 6, a discharge valve 7, a material conveying pipe 8, a support 9, a rotating handle 10, a roadway 11, a blast hole 12 and an extraction control hole 13.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 3.

The embodiment of the invention provides a complete set of gas treatment process for realizing deep hole pressure relief control blasting rapid outburst elimination and gas extraction standard reaching, wherein the complete set of gas treatment process comprises the following steps of: step S1, determining the arrangement mode and parameters of the blast holes and the extraction control holes according to the coal seam parameters; step S2, drilling an extraction control hole according to the arrangement mode and parameters and performing screen pipe connection extraction; and step S3, constructing the blast hole in time after the construction of the extraction control hole is finished and the combined extraction is realized, and filling the explosive hole immediately after one drilling tool is taken out of the blast hole. The charging process and the charging structure are determined according to the hole forming condition; and step S4, sealing holes and blasting, wherein the coal seam parameters comprise coal seam occurrence, coal seam gas pressure, coal seam air permeability coefficient, coal firmness coefficient and coal seam gas adsorption condition.

According to the scheme, reasonable extraction control holes, blast hole design, a drilling construction slag discharging mode and a hole protecting measure are provided according to factors such as coal seam occurrence, coal seam gas pressure, coal seam gas permeability coefficient, coal firmness coefficient and coal seam gas adsorption condition, the drilling depth, the control range and the gas control range are guaranteed to meet requirements of 2009 'prevention and control coal and gas outburst regulations', the hole sealing length and the blast hole arrangement meet requirements of 'coal mine underground deep hole control presplitting blasting technical conditions' (MT1036-2007), and meanwhile, the drilling construction quality is guaranteed to meet requirements of extraction control holes, blast hole underground sieve tubes and requirements.

The arrangement mode is the arrangement mode of the blast holes and the extraction control holes, the control ranges on two sides of the roadway are obtained, and the parameters are the lengths and the diameters of the blast holes and the extraction control holes.

Specifically, the permeability coefficient of the coal seam is low, the gas adsorption is high, the drilling distance needs to be correspondingly reduced, and the drilling distance with the large coal seam thickness also needs to be reduced. When the inclination angle of the coal seam changes and the control ranges of the two sides of the roadway are different, the blasting holes and the extraction control holes are arranged asymmetrically. When the gas pressure of the coal seam is high, the distance between the drill holes is correspondingly reduced, so that the gas can be quickly extracted.

As shown in fig. 3, in an embodiment of the invention, the blast hole and the extraction control hole are arranged at an interval, and when gas is extracted through the extraction control hole, the extraction control hole adds an auxiliary free surface to each of two sides of the blast hole, so that the blasting effect is enhanced. Meanwhile, the phenomenon of blasting stress concentration can be eliminated, and the blasting effect is improved.

And moreover, the extraction control holes are respectively and independently arranged on the two sides of the roadway, so that gas can be timely controlled when the gas adsorption condition of the coal seam is serious, and the possibility of gas outburst accidents is reduced.

Wherein, during blasting, single hole blasting can be carried out, and multiple holes can be simultaneously blasted.

In the foregoing embodiment, preferably, step S3 specifically includes: step S31, drilling blast holes according to the arrangement mode and the parameters; and step S32, determining the firmness coefficient of the coal seam, and when the firmness coefficient is greater than a preset value, charging the blast hole by using an external bus or internal bus charging process, or else, charging the blast hole by using a double-bus charging process.

In this scheme, when the firmness coefficient is greater than the default (for example for 1), the coal seam probability of collapsing this moment is less, uses external bus or built-in bus powder charge technology to carry out the powder charge to the blast hole, can enough reach the requirement, can reduce the cost again, shortens the powder charge time simultaneously, and then improves work efficiency. When the firmness coefficient is less than the preset value, the coal seam collapse possibility is large, the double-bus charging process is used for charging the blast hole, the possibility that normal blasting cannot be carried out due to the fact that the coal seam collapses can be reduced, and then the blasting reliability is improved.

The detonator is placed in the explosive, the bus is connected with the detonator, and the bus and the explosive cartridge are placed in the PVC pipe in a built-in bus structure, so that the bus is finally led out of the orifice. The external bus structure means that the cartridges are all arranged in the PVC pipe, the bus is arranged outside the PVC pipe, and the bus is finally led out of the orifice. The double-bus structure is: the inner charging section is connected with the inner detonator by a bus, and the bus is led out of the hole from the inside of the hole. The outer charging section is connected with the outer detonator by a bus, and the bus is also led out of the hole from the hole. In any of the above embodiments, preferably, step S4 specifically includes: step S41, sealing the blast hole by using mining compressed air sealing equipment; and step S42, blasting the blast hole.

In the scheme, the mining compressed air hole sealing equipment can seal not only deep hole blast holes, but also gas extraction holes and gas pressure measuring holes, and can seal and pump the gas extraction holes, and seal and measure the gas extraction holes. On the other hand, the hole sealing material has wide sources, namely, the hole sealing can be carried out by adopting a single medium material of clay, or adopting a plurality of medium materials of cement, yellow sand, water, cement, fly ash, water, cement, gangue powder, water and the like, the operation is simple, the price is low, the hole sealing cost is low, and the hole sealing quality can be ensured.

It should also be pointed out that the deep hole pressure relief controls the blasting to control the gas, and the gun head is a double-detonator parallel gun head, so that the occurrence of misfiring and residual blasting must be avoided. The explosion rejection and the residual explosion cannot achieve the effect of effectively controlling the gas, and the explosion equipment of the explosion rejection and the residual explosion remains in the coal (rock) body, so that great potential safety hazards are buried in the tunneling (or recovery) of a working face. In order to avoid the occurrence of refusal explosion and residual explosion, firstly, deteriorated and invalid explosion equipment is strictly forbidden; secondly, the detonator used for blasting must be the detonator produced by the same manufacturer, and the detonators produced by different manufacturers are strictly forbidden to be mixed; thirdly, the detonator leg wire is well connected with the bus, all the wire connectors must be kept clean and firmly connected and are wrapped by insulating tapes to prevent the misfire caused by open circuit or short circuit. Before charging, the insulated double conducting wires used for charging must be conducted and measured, and the conducting wires are ensured to have no problem, in order to eliminate the phenomenon of residual explosion of explosive, when the detonator is charged, the detonator is completely inserted into the explosive cartridge from the top of the explosive cartridge, and the detonator is strictly inserted into the explosive cartridge or bound on the explosive cartridge. And sixthly, conducting test is carried out on the blasting bus before blasting, and voltage and current of the blasting device must be enough. Seventhly, the gun head for deep hole pressure relief blasting is manufactured by a professional blasting operator, and is assisted by a team leader, the manufactured gun head is required to be arranged in a blasting tube in time, and a blasting bus is led out to be in short circuit, so that each detonator in a cartridge case is in a short circuit state.

As shown in fig. 1 and fig. 2, in any of the above embodiments, preferably, the mining compressed air sealing device includes: the tank body 5, the lower side of the tank body 5 is provided with a conical part, and the upper part of the tank body 5 protrudes outwards to form an air inlet 4 and a feed inlet 3; the material conveying pipe 8 is communicated with the lower end of the conical part through the discharge valve 7, and one end, far away from the discharge valve 7, of the material conveying pipe 8 extends into the hole (the material conveying valve is in threaded connection with the lower end of the conical part, and the material conveying pipe 8 is in threaded connection with the material conveying valve); the sealing cover 2 is detachably arranged at the feed port 3; the pressure gauge 6 is fixedly arranged on the tank body 5, the detection end of the pressure gauge 6 is communicated with the interior of the tank body 5 (the pipe body protrudes outwards to form a pipe body, the pressure gauge 6 is in threaded connection with the pipe body, and the detection end of the pressure gauge 6 is communicated with the interior of the tank body 5 through the pipe body), wherein the radius of the conical part is gradually reduced from top to bottom.

In this scheme, at first close bleeder valve 7, open feed inlet 3 afterwards, put into jar body 5 with the hole sealing material in, reinforced back that finishes, sealed lid 2 seals feed inlet 3 and closes relief valve 1 door, opens the air supply mouth, and the pressure in jar body 5 risees gradually, and when the pressure in jar body 5 risees to predetermineeing numerical value, closes air inlet 4, opens bleeder valve 7, and the hole sealing material is injected into the blast hole under the effect of the internal and external pressure difference of jar body 5 to seal the blast hole. And then opening the pressure release valve 1, closing the feeding valve after the air pressure inside and outside the tank body 5 is balanced, opening the feeding hole 3, and repeating the steps until the hole sealing operation is completed.

In this scheme, through setting up manometer 6 the operating personnel of being convenient for control the pressure in the jar body 5 in real time to can reduce the possibility of the too big or undersize of the internal pressure of jar body 5. Meanwhile, the operation difficulty can be reduced, and the method is convenient for large-scale popularization.

When still pointing out, through setting up manometer 6, operating personnel can adjust the atmospheric pressure in the jar body 5 to different pressure values, and the technical staff of being convenient for can be according to hole sealing material and blasting aperture etc. of difference and adjust the pressure in the jar body 5, and the mining compressed air hole sealing equipment hole sealing material in this scheme is not single promptly, can be for cement, yellow sand, waste rock powder, fly ash and clay, is convenient for draw materials on the spot, low cost, and the suitability is better.

In the above embodiment, it is preferable that the seal cover 2 is detachably provided with the relief valve 1.

In any of the above embodiments, preferably, one of the sealing cover 2 and the pressure relief valve 1 is provided with a first external thread, and the other is provided with a first internal thread, and the sealing cover 2 and the pressure relief valve 1 are detachably connected through the cooperation of the first external thread and the first internal thread.

In any of the above embodiments, preferably, a rotating handle 10 is fixed on the side of the sealing cover 2 away from the tank 5 (for example, the rotating handle 10 is welded on the sealing cover 2).

In any of the above embodiments, preferably, one of the tank 5 and the sealing cover 2 is provided with a second external thread, and the other is provided with a second internal thread, and the sealing connection of the sealing cover 2 at the feed opening 3 is realized through the matching of the second external thread and the second internal thread.

In any of the above embodiments, preferably, the method further includes: a plurality of supports 9, support 9 sets firmly on jar body 5 (for example a plurality of supports 9 weld on jar body 5), and a plurality of supports 9 support with ground and lean on to support jar body 5.

Preferably, as shown in fig. 1 and 2, the number of the brackets 9 is three, and the three brackets 9 are uniformly distributed along the periphery of the tank 5.

The technical scheme of the invention is explained in detail by combining the attached drawings, a complete set of patent technology for preventing and controlling coal and gas outburst and gas extraction by adopting deep hole presplitting pressure relief control blasting is adopted, only 7 to 11 drill holes are used for quickly realizing one hundred percent of outburst elimination without blind areas in a control range, and extraction reaches the standard only within 3 to 5 days. Ensuring the residual gas content to be 8m³A value of K1 of 0.5 or less and a residual gas pressure of 0.74MPa or less. The gas extraction concentration is high, and the extraction speed efficiency is improved by 5-19 times.

Meanwhile, compared with the traditional coal and gas outburst prevention and control and gas extraction technology, the method has huge economic benefits and safety guarantee in the tunneling of every hundred meters of coal mines, and the main indexes are as follows:

the number of the drilled holes is only one third to one fourth of the original number; compared with cross-layer drilling, the length of the drilled hole is reduced by more than 4500 meters per hundred meters; compared with the traditional bedding drilling, the drilling is reduced by more than 1000 meters; the number of grouting and drainage pipelines is reduced by more than 1400 meters; the cement yellow sand is reduced by more than 150 bags; marilsan is reduced by over 200 bags.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas treatment process is characterized by comprising the following steps:

step S1, determining the arrangement mode and parameters of the blast holes and the extraction control holes according to the coal seam parameters;

step S2, drilling the extraction control holes according to the arrangement mode and the parameters of the extraction control holes and performing sieve tube joint extraction;

step S3, after the construction of the extraction control hole is finished and the linked extraction is realized, a blast hole is constructed, and after one drilling tool is taken out of the blast hole, the charge is immediately carried out according to the hole forming condition;

step S3 specifically includes: step S31, drilling blast holes according to the arrangement mode and parameters of the blast holes;

step S32, determining the firmness coefficient of the coal seam, charging the blast hole by using an external bus or internal bus charging process when the firmness coefficient is larger than a preset value, and charging the blast hole by using a double-bus charging process when the firmness coefficient is smaller than or equal to the preset value;

step S4, sealing the hole and blasting,

the coal bed parameters comprise coal bed occurrence, coal bed gas pressure, a coal bed air permeability coefficient, a firmness coefficient of coal and coal bed gas adsorption conditions;

step S4 specifically includes:

step S41, sealing the blast hole by using mining compressed air sealing equipment;

step S42, blasting the blast hole;

mining pressure wind hole sealing equipment includes:

the tank body (5), a conical part is formed at the lower side of the tank body (5), and the upper side part of the tank body (5) protrudes outwards to form an air inlet (4) and a feed inlet (3);

the material conveying pipe (8) is communicated with the lower end of the conical part through a discharge valve (7);

the sealing cover (2) is detachably arranged at the feed port (3);

a pressure gauge (6) which is fixedly arranged on the tank body (5) and the detection end of the pressure gauge (6) is communicated with the interior of the tank body (5),

wherein, from top to bottom, the radius of toper portion reduces gradually.

2. The gas abatement process of claim 1,

the sealing cover (2) is detachably provided with a pressure release valve (1).

3. The gas abatement process of claim 2,

one of the sealing cover (2) and the pressure release valve (1) is provided with a first external thread, the other one of the sealing cover and the pressure release valve is provided with a first internal thread, and the sealing cover (2) and the pressure release valve (1) are detachably connected through the matching of the first external thread and the first internal thread.

4. The gas abatement process of claim 3,

and a rotating handle (10) is fixedly arranged on one side of the sealing cover (2) far away from the tank body (5).

5. The gas abatement process of any one of claims 1 to 4,

one of the tank body (5) and the sealing cover (2) is provided with a second external thread, the other one is provided with a second internal thread, and the sealing cover (2) is in sealing connection with the feed port (3) through the matching of the second external thread and the second internal thread.