阅读说明：本技术 一种运顺巷道煤仓口封堵方法 (Method for plugging coal bunker opening of haulage roadway ) 是由 孙栋良 梁昌军 支英骁 吴长春 赵长松 黄自华 田利峰 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种运顺巷道煤仓口封堵方法,步骤1：在巷道顶帮上搭载临时支护装置；步骤2：对巷道侧墙放松动炮；步骤3：搭设多组U型棚架,并在每组U型棚架顶部之间铺设第一金属网,在第一金属网上搭设木垛；步骤4：预埋注浆管；步骤5：喷浆支护；步骤6：通过注浆管注浆；步骤7：拆除步骤1中的临时支护装置,并移动至下个操作面,并重复上述步骤1至步骤6。本发明的优点在于,该封堵方法通过临时支护装置的设置,防止巷道顶帮掉矸石伤人,杜绝了空顶作业,提高运顺煤仓口封堵作业的安全系数。同时,该封堵方法采用了U型棚架+喷注浆支护施工工艺,增加了支护的强度和稳定性,形成了永久支护。(The invention discloses a method for plugging a coal bunker opening of a haulage roadway, which comprises the following steps of 1: carrying a temporary supporting device on the top wall of the roadway; step 2: loosening guns are released on the side wall of the roadway; and step 3: erecting a plurality of groups of U-shaped shed frames, laying a first metal net between the tops of each group of U-shaped shed frames, and erecting a wood crib on the first metal net; and 4, step 4: embedding a grouting pipe; and 5: carrying out guniting support; step 6: grouting through a grouting pipe; and 7: and (4) dismantling the temporary support device in the step 1, moving to the next operation surface, and repeating the steps 1 to 6. The method has the advantages that the temporary supporting device is arranged, so that the phenomenon that the gangue falls off from the top of the roadway to hurt people is prevented, the empty roof operation is stopped, and the safety factor of the plugging operation of the coal bunker opening in the transportation direction is improved. Meanwhile, the plugging method adopts a construction process of U-shaped shed frames and slurry injection support, so that the strength and stability of the support are improved, and a permanent support is formed.)

1. A method for plugging a coal bunker opening of a haulage roadway is characterized by comprising the following steps: the method comprises the following steps:

step 1: a temporary supporting device is carried on the roadway top side on one side of the lower opening of the coal bunker for protecting the roadway top side;

step 2: loosening guns are placed on the side wall of the roadway at the position of the coal conveying downstream bunker port until the width of the roadway meets the width of the U-shaped shed frame;

and step 3: erecting a plurality of groups of U-shaped shed frames at the bottom of a coal conveying bunker port, laying a first metal net between the tops of each group of U-shaped shed frames, erecting a wood crib on the first metal net, and connecting the wood crib with a roadway top side and a coal conveying bunker port;

and 4, step 4: one end of the grouting pipe is arranged at the bottom of the U-shaped shed frame, and the other end of the grouting pipe is embedded into a gap between the first metal net and the top wall of the roadway and between the first metal net and the port of the down-run coal bunker;

and 5: carrying out guniting support on gaps among the first metal mesh, the roadway top wall and the coal conveying down-the-way bunker opening;

step 6: after the slurry spraying is finished, grouting is carried out through a grouting pipe, and gaps among the first metal net, the roadway top side and the coal bunker port in the conveying direction are reinforced and compacted;

and 7: and (3) dismantling the temporary supporting device in the step 1, moving to the next operation surface, and repeating the steps 1 to 6 until the closure of the coal bunker port is finished.

2. The method for plugging the coal bunker opening of the haulage roadway according to claim 1, wherein the method comprises the following steps: the temporary supporting device comprises anchor cables, longitudinal beams, cross beams and a second metal net, wherein the uniform group of anchor cables are fixed on the top sides of the roadway on two sides of the coal bunker port in the conveying direction, the longitudinal beams are fixed between the anchor cables on two sides of the coal bunker port in the conveying direction side by side, a plurality of cross beams are fixed between the longitudinal beams, and the second metal net is fixed between the cross beams.

3. The method for plugging the coal bunker opening of the haulage roadway according to claim 2, wherein the method comprises the following steps: and a supporting single body is arranged at the bottom of the cross beam in a drilling mode.

4. The method for plugging the coal bunker opening of the haulage roadway according to claim 1, wherein the method comprises the following steps: the wood buttress is erected in a cross shape.

5. The method for plugging the coal bunker opening of the haulage roadway according to claim 1, wherein the method comprises the following steps: and a cement back plate or a woven bag is further paved on the top of the first metal net.

6. The method for plugging the coal bunker opening of the haulage roadway according to claim 1, wherein the method comprises the following steps: and 4, arranging the grouting pipe in a mode of avoiding the wood pile.

7. The method for plugging the coal bunker opening of the haulage roadway according to claim 1, wherein the method comprises the following steps: and the step 5 of spraying the slurry comprises the steps of spraying the side wall of the roadway firstly, then spraying the top of the U-shaped shed frame, and spraying the slurry in a sequence of first-down spraying and then-up spraying.

8. The method for plugging the coal bunker opening of the haulage roadway according to claim 1, wherein the method comprises the following steps: and (5) spraying the bottom surface of the first metal net before spraying in the step 5.

Technical Field

The invention relates to the technical field of roadway construction, in particular to a method for plugging a coal bunker opening of a haulage roadway.

Background

At present, some conveying roadways are provided with coal bin openings, and the conveying coal bin openings which are not used need to be blocked, for example, the Chinese patent publication No. CN103670449A discloses a local blocking and supporting technology of the coal bin, and the problem that the service capacity of each air shaft is increasingly tense is solved.

However, the lower opening of the coal bunker is influenced by long-term water spraying of the coal bunker wall, so that the top side of the roadway is cracked, broken and deformed, and the pressure of the roadway appears due to mining influence, so that the side of the roadway is obviously displaced, roof fall accidents are easy to happen, and in the supporting process, a person fills and connects a solid roof, so that great potential safety hazards exist.

Disclosure of Invention

The invention aims to solve the technical problem of how to improve the safety coefficient of plugging of the coal bin opening in the transportation process.

In order to solve the technical problems, the invention provides the following technical scheme:

a method for plugging a coal bunker opening of a haulage roadway comprises the following steps: carrying a temporary supporting device on the top side of the roadway on one side of the transporting coal bunker opening for protecting the top side of the roadway;

step 2: loosening guns are placed on the side wall of the roadway at the lower opening of the coal bunker in the conveying direction until the width of the roadway meets the width of the U-shaped shed frame;

and step 3: erecting a plurality of groups of U-shaped shed frames at the bottom of a coal conveying bunker port, laying a first metal net between the tops of each group of U-shaped shed frames, erecting a wood crib on the first metal net, and connecting the wood crib with a roadway top side and a coal conveying bunker port;

and 4, step 4: one end of the grouting pipe is arranged at the bottom of the U-shaped shed frame, and the other end of the grouting pipe is embedded into a gap between the first metal net and the top wall of the roadway and between the first metal net and the port of the down-run coal bunker;

and 5: carrying out guniting support on gaps among the first metal mesh, the roadway top wall and the coal conveying down-the-way bunker opening;

step 6: after the slurry spraying is finished, grouting is carried out through a grouting pipe, and gaps among the first metal net, the roadway top side and the coal bunker port in the conveying direction are reinforced and compacted;

and 7: and (3) dismantling the temporary supporting device in the step 1, moving to the next operation surface, and repeating the steps 1 to 6 until the closure of the coal bunker port is finished.

According to the plugging method, the temporary supporting device is arranged, so that the roadway top wall at the position of the coal transportation bunker opening is protected, the phenomenon that the roadway top wall falls gangue to hurt people is prevented, the empty roof operation is stopped, and the safety factor of plugging operation of the coal transportation bunker opening is improved. Meanwhile, the plugging method adopts a construction process of U-shaped shed frames and slurry injection support, so that the strength and stability of the support are improved, and a permanent support is formed.

Preferably, the temporary supporting device comprises anchor cables, longitudinal beams, cross beams and a second metal net, wherein the uniform group of anchor cables are fixed on the top sides of the roadway on two sides of the coal bunker port in the conveying direction, the longitudinal beams are fixed between the anchor cables which are arranged side by side on two sides of the coal bunker port in the conveying direction, a plurality of cross beams are fixed between the longitudinal beams, and the second metal net is fixed between the cross beams.

Preferably, the bottom of the cross beam is also provided with a supporting single body in a drilling mode.

Preferably, the wood cribs are erected in a cross shape.

Preferably, a cement back plate or a woven bag is further paved on the top of the first metal net.

Preferably, the grouting pipe in the step 4 is arranged to avoid the wood pile.

Preferably, the step of spraying the slurry in the step 5 is to spray the side wall of the roadway first and then spray the top of the U-shaped shed frame, and the slurry is sprayed sequentially from bottom to top.

Preferably, the bottom surface of the first expanded metal is gunited before the guniting in the step 5.

Compared with the prior art, the invention has the beneficial effects that:

according to the plugging method, the temporary supporting device is arranged, so that the roadway top wall at the position of the coal transportation bunker opening is protected, the phenomenon that the roadway top wall falls gangue to hurt people is prevented, the empty roof operation is stopped, and the safety factor of plugging operation of the coal transportation bunker opening is improved. Meanwhile, the plugging method adopts a construction process of U-shaped shed frames and slurry injection support, so that the strength and stability of the support are improved, and a permanent support is formed.

Drawings

Fig. 1 is a schematic structural view of a temporary support device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the building of a U-shaped canopy frame according to an embodiment of the present invention.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless explicitly stated or limited otherwise, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and fig. 2, the embodiment discloses a method for plugging a coal bunker opening of a haulage roadway, which includes the following steps:

step 1: carry on temporary support device 2 on the tunnel top group of one side of fortune in the same direction as coal bunker mouth 1 department for the protection of tunnel top group prevents that the tunnel top group from falling the waste rock and hurting people.

The temporary supporting device 2 comprises anchor cables 21, longitudinal beams 22, cross beams 23, second metal nets 24 and supporting monomers 25, a group of anchor cables 21 are fixed on roadway top sides on two sides of the coal bunker opening 1, the longitudinal beams 22 are fixed between the anchor cables 21 arranged side by side on two sides of the coal bunker opening 1, a plurality of cross beams 23 are fixed between the longitudinal beams 22, the second metal nets 24 are directly fixed on the cross beams 23, the supporting monomers 25 are arranged at the bottom of the cross beams 23, and deflection deformation of the cross beams 23 is prevented. The gangue that the roof group of tunnel fell is received through second metal mesh 24, forms temporary support, prevents that the roof group of tunnel from falling the gangue and hurting people, improves the factor of safety of fortune in the same direction as coal bunker mouth 1 shutoff operation.

Specifically, in this embodiment, the longitudinal beams 22 and the cross beams 23 are both i-shaped steel, and a distance of 500mm is provided between each of the cross beams 23.

Step 2: and (3) loosening guns are placed on the side wall of the roadway at the position of the coal bunker port 1 in the conveying direction until the width of the roadway meets the width set up by the U-shaped shed frame 3.

What needs to be explained here, the roadway side part at the coal bunker port 1 is poured by adopting C30 concrete and a steel bar net, the manual brushing expansion speed is slow, the production efficiency is restricted, and in the embodiment, the auxiliary construction is carried out by loosening the cannon. Specifically, before blasting, the fully-mechanized excavating machine is moved to the front of a blasting point and protected by a large plate, and the excavator is moved to the rear of the blasting point. The construction method comprises the steps of drilling holes at one time, charging at one time and blasting at one time by adopting a common drilling and blasting method. The eye depth of the loose cannon is 1.5m, and the loading amount is 1 roll per eye. In the construction process, related blasting parameters such as blast hole depth, angle, explosive loading, blast hole spacing and the like are adjusted in time according to lithology so as to achieve the optimal blasting effect; the explosive adopts three-level water gel explosive allowed for coal mines.

And step 3: set up multiunit U type rack 3 in fortune in the same direction as coal bunker mouth 1 bottom, set up three groups of U type racks 3 at every turn in this embodiment to lay first metal mesh (not shown in the figure) between 3 tops of every group U type rack, and still laid cement backplate or braided bag at first metal mesh top, prevent that later stage whitewashing leaks the thick liquid phenomenon and take place, then set up wooden buttress 4 on first metal mesh, connect the reality through wooden buttress 4 and tunnel ceiling and fortune in the same direction as coal bunker mouth 1.

The wood crib 4 is erected in a shape of a Chinese character jing, the wood crib is formed by driving 1.5 m-long logs layer by layer from inside to outside and from bottom to top, and the logs are mutually pressed for stubbles. After the wood piles are arranged, the wood piles are firmly connected with the tracks and the sealing plate, and the wood piles are integrally formed by the raking nails, so that the top edge of the roadway is firmly connected with the U-shaped shed frame 3.

And 4, step 4: and one end of the grouting pipe 5 is arranged at the bottom of the U-shaped shed frame 3, and the other end of the grouting pipe 5 is embedded into a gap between the first metal net and the top wall of the roadway and between the first metal net and the transportation coal bunker port 1, so that the grouting pipe 5 is arranged to avoid the wood crib 4.

And 5: the bottom surface of the first metal net is subjected to guniting, and is blocked, so that the later guniting and leakage phenomena are prevented.

And then carrying out guniting support on gaps among the first metal mesh, the top wall of the roadway and the transportation coal bunker opening 1.

Specifically, a shotcrete machine is used for shotcrete support. The guniting material adopts mineral inorganic quick-setting composite mortar, and the guniting machine adopts a PS3U-TB type guniting machine. The thickness of the guniting is not less than 50 mm; the distance between the nozzle and the spraying surface is kept to be 0.8-1.2 m, the wind pressure is kept to be 0.4-0.5 MPa, the wind pressure at the nozzle is kept to be about 0.1-0.18 MPa, and the water pressure at the nozzle is 0.1MPa higher than the wind pressure. The moving mode of the nozzle adopts a spiral track, clockwise rotation is carried out, and the nozzle moves forwards uniformly and slowly by pressing a half circle; the step of spraying the slurry is to spray the side wall of the roadway firstly and then spray the top of the U-shaped shed frame, and the slurry is sprayed in sequence from bottom to top, and the thickness of a sprayed layer is ensured.

Step 6: and after the slurry spraying is finished, slurry is injected through the slurry injection pipe 5, and the gap between the first metal net and the top wall of the roadway and the gap between the first metal net and the top wall of the coal bunker in the conveying direction are reinforced and compacted.

Specifically, ZBY3/16-22 type hydraulic grouting pumps are selected for grouting, and ordinary portland cement is adopted as grouting cement; the grouting pressure is 5-8 Mpa. The construction slope of the roadway is 8 degrees, a sectional isolation grouting method is adopted, the top slope of the roadway is adopted for closure every 20-30 m, grouting slurry is prevented from flowing into the head-on shed-changing section, and the construction efficiency is improved.

And 7: and (3) dismantling the temporary support device 2 in the step (1), moving to the next operation surface, and repeating the steps (1) to (6) until the closure of the coal bunker port (1) is completed.

According to the plugging method, the temporary supporting device 2 is arranged, so that the top wall of the roadway at the position of the coal transportation bunker opening 1 is protected, the phenomenon that the top wall of the roadway falls gangue to hurt people is prevented, the empty roof operation is stopped, and the safety factor of plugging operation of the coal transportation bunker opening 1 is improved. Meanwhile, the plugging method adopts a U-shaped shed frame 3+ slurry injection supporting construction process, so that the strength and stability of the support are improved, and a permanent support is formed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The above-mentioned embodiments only represent embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the concept of the present invention, and these embodiments are all within the protection scope of the present invention.