Rapid gob-side entry retaining pier column mold

Abstract

The utility model relates to the technical field of coal mining, and provides a rapid gob-side entry retaining pier column mold, which comprises an outer cylinder body, an inner cylinder body, a plurality of outer cylinder bodies, a plurality of inner cylinder bodies and a plurality of inner cylinder bodies, the outer cylinder body comprises at least two coaxially nested cylinder sections, and the cylinder sections are in sliding fit in the axial direction to enable the outer cylinder body to extend and retract in the axial direction; the flexible mold bag is arranged in the outer barrel, one end of the flexible mold bag is exposed out of the end of the outer barrel, and a pouring opening is formed in the flexible mold bag; and the adjusters are arranged between the adjacent barrel sections and are suitable for positioning the adjacent barrel sections according to the preset length of the outer barrel body. By means of the arrangement, the pier column mold can better adapt to fluctuating roadway heights, the pier column molds of the same specification can be universal in the whole roadway, no extra roof contact medium needs to be adopted for independent roof contact work, construction convenience and roof contact efficiency are improved, meanwhile, zero-clearance complete roof contact of the pier column mold can be achieved, and the bearing performance of the pier column mold is guaranteed; the outer barrel in the contracted state can reduce space occupation in the transportation process, and the transportation efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mining, especially to a quick along empty roadway retaining arch support column mold. BACKGROUND

[0002] Along empty roadway retaining is a main way of improving coal recovery rate and green mining without coal pillar, can effectively reduce coal loss, can be used for lower section working face recovery, has many advantages such as reducing roadway driving rate, realizing Y type ventilation, solving corner gas accumulation.

[0003] The existing along empty roadway retaining technology mainly divides two categories, one is to pour concrete wall on one side of the goaf, and the other is to pour concrete arch support column on one side of the goaf. Both replace the traditional reserved coal pillar, retain the transport roadway of the working face, and provide recovery for the lower section working face.

[0004] Compared with pouring concrete wall, the steel pipe concrete arch support column combines the advantages of concrete and steel pipe, the outer constraint steel pipe of the steel pipe concrete arch support column not only plays the role of formwork during pouring concrete, but also provides constraint for the internal concrete, showing more excellent mechanical properties. In addition, the steel pipe concrete arch support column has small filling amount, low filling cost and fast roadway retaining speed, so it has been widely applied.

[0005] However, due to the inconsistency of the height of the underground roadway, the standard size of the outer constraint steel pipe is difficult to adapt to the fluctuation of the roadway height. Generally, different lengths of outer constraint steel pipes need to be customized according to the change of the roadway height, or additional top joint medium is used to independently perform the top joint work, which leads to poor actual construction convenience and low overall top joint efficiency. In addition, due to the vertical setting of the outer constraint steel pipe, the length of the diagonal line is limited, which leads to a certain gap between the outer constraint steel pipe and the roadway roof and cannot completely joint the top. The flexible formwork of the pumped concrete will bulge outward from the top gap to form a mushroom head shape, which leads to that the pressure of the pressure joint cannot be too large (the flexible formwork will explode if the pressure is too large), which is not conducive to bearing. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of quick along empty roadway retaining arch support column mold to solve the defects that outer constraint steel pipe in prior art is poor in adaptability and difficult to completely joint top, can conveniently and efficiently realize that concrete arch support column completely joints top, guarantee its bearing performance.

[0007] The utility model provides a kind of quick along empty roadway retaining arch support column mold, comprising:

[0008] Outer cylinder body, including at least two cylinder sections coaxially nested, the cylinder section is axially sliding fit between the cylinder section, so that the outer cylinder body can be axially telescopic;

[0009] A flexible mold bag is arranged inside the outer cylinder body and one end of the flexible mold bag is exposed from the end of the outer cylinder body, and a pouring opening is arranged on the flexible mold bag;

[0010] An adjuster is arranged between adjacent cylinder segments and is suitable for positioning adjacent cylinder segments according to a preset length of the outer cylinder body.

[0011] According to the quick along-empty roadway retaining pier column mold, the first cylinder segment is sleeved outside the second cylinder segment.

[0012] A plurality of connection points are arranged between the first cylinder segment and the adjuster, the plurality of connection points are arranged along the axial direction of the first cylinder segment, the adjuster and the first cylinder segment can be detachably connected at different connection points, and the second cylinder segment is positioned at different positions along the axial direction of the first cylinder segment.

[0013] According to the quick along-empty roadway retaining pier column mold, the adjuster at least comprises a plurality of elastic plates.

[0014] The plurality of elastic plates are arranged in the first cylinder segment and are arranged in a ring structure around the axis of the first cylinder segment, and the inner diameter of the ring structure is greater than the outer diameter of the second cylinder segment.

[0015] One end of the elastic plate towards the first cylinder segment is provided with a barb, and the barb is bent towards the axis direction of the ring structure.

[0016] According to the quick along-empty roadway retaining pier column mold, the adjuster further comprises a ring-shaped main body, the other end of the elastic plate relative to the barb is connected with the main body, and the plurality of elastic plates are connected as a whole through the main body.

[0017] According to the quick along-empty roadway retaining pier column mold, a first positioning hole is arranged on the first cylinder segment, a plurality of second positioning holes are arranged on the adjuster along the axial direction, the first positioning hole can correspond to different positions of the second positioning hole with the axial movement of the adjuster, thereby forming a plurality of connection points.

[0018] Further comprising a positioning member, the positioning member is suitable for sequentially penetrating the first positioning hole and the second positioning hole, and is used for positioning the first cylinder segment and the adjuster.

[0019] According to the quick along-empty roadway retaining pier column mold, a scale is arranged on the adjuster corresponding to the position of the second positioning hole, and is used for displaying the axial length of the outer cylinder body corresponding to the second positioning hole at different positions.

[0020] The first cylinder section is fixedly connected with a first reinforcing ring at one end for matching the second cylinder section.

[0021] And / or, the outer cylinder body is fixedly connected with a second reinforcing ring at one end for exposing the end of the flexible mold bag.

[0022] According to the utility model provides a kind of quick along empty roadway retaining pier column mould, the first cylinder section is the first end for matching the one end of the second cylinder section towards the first cylinder section, and the one end of the second cylinder section is the second end;

[0023] Further comprising driving structure for driving the second cylinder section to slide axially relative to the first cylinder section;The driving structure includes a rope through the first end side in radial direction;The rope is in sliding fit with the first cylinder section and is supported on the second end.

[0024] According to the utility model provides a kind of quick along empty roadway retaining pier column mould, the second end is equipped with the radial limit slot, and the rope is slidably embedded in the limit slot.

[0025] According to the utility model provides a kind of quick along empty roadway retaining pier column mould, the outer cylinder body is equipped with the pouring hole corresponding to the pouring port position, the pouring hole penetrates the second reinforcing ring, and the pouring port is led out by the pouring hole.

[0026] According to the utility model provides a kind of quick along empty roadway retaining pier column mould, the positioning member includes a bolt.

[0027] According to the utility model provides a kind of quick along empty roadway retaining pier column mould, the second reinforcing ring is equipped with the radial extension clamping portion.

[0028] The utility model further provides a kind of construction method of quick along empty roadway retaining pier column mould, comprising the following steps:

[0029] The quick along empty roadway retaining pier column mould of any one of the above is provided, and various construction materials are transported to the underground construction position;

[0030] Net sealing, close to the goaf along top and hang the reinforcing mesh and sealing cloth, and carry out leveling treatment to the construction position;

[0031] Erecting mould, placing pier column mould in sequence, driving cylinder section relative movement makes outer cylinder body elongation and top joint;

[0032] Pumping concrete, pumping concrete into the pier column mould until the flexible mold bag is completely jointed;

[0033] Spraying sealing material, after concrete solidification, form loadable airtight roadway retaining support wall;

[0034] The above steps of hanging net sealing, setting the mold, pumping concrete and spraying sealing material are repeated until the construction is completed.

[0035] The quick gob-side entry retaining pier column mold provided by the utility model solves the problems of large filling amount, high filling cost and slow entry retaining speed of the existing gob-side entry retaining wall body, is suitable for large mines with quick working face advancing, can make the outer cylinder body stretch or shrink in the axial direction by making the cylinder segments slide in the axial direction, thereby adjusting the axial length of the outer cylinder body, making the outer cylinder body better adapt to the fluctuating entry height, realizing the full entry-way generalization of the pier column mold of the same specification without the need of customizing pier column molds of different length specifications or independently performing the roof connecting work by using additional roof connecting medium, improving the convenience and roof connecting efficiency of construction; meanwhile, after the pier column mold is set up, the axial length of the outer cylinder body can be adjusted to ensure that the two ends of the pier column mold are in complete contact with the roof and floor of the entry, realize zero-gap complete roof connecting and ensure the bearing performance; in addition, the outer cylinder body can be in the contracted state during the transportation of the pier column mold, occupies a smaller transportation space and has higher single transportation efficiency of the same volume of transportation vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0037] Figure 1 is one of the structural schematic diagrams of the quick gob-side entry retaining pier column mold in the extended state provided by the utility model embodiment.

[0038] Figure 2 is the second structural schematic diagram of the quick gob-side entry retaining pier column mold in the extended state provided by the utility model embodiment.

[0039] Figure 3 is the structural schematic diagram of the quick gob-side entry retaining pier column mold in the compressed state provided by the utility model embodiment.

[0040] Figure 4 is the exploded view of the quick gob-side entry retaining pier column mold provided by the utility model embodiment.

[0041] Figure 5 is the structural schematic diagram of the regulator provided by the utility model embodiment.

[0042] Figure 6is a structure schematic view of the second cylinder section and the adjuster cooperation in the contraction state of the pier mold provided by the embodiment of the utility model.

[0043] Figure 7 is a structure schematic view of the second cylinder section and the adjuster cooperation in the contraction state of the pier mold provided by the embodiment of the utility model.

[0044] Figure 8 is a structure schematic view of the second cylinder section and the adjuster cooperation in the elongation state of the pier mold provided by the embodiment of the utility model.

[0045] Figure 9 is a structure schematic view of the second cylinder section and the adjuster cooperation in the elongation state of the pier mold provided by the embodiment of the utility model.

[0046] Figure 10 is a structure schematic view of the second cylinder section and the adjuster cooperation in the elongation state of the pier mold provided by the embodiment of the utility model. Figure 5 is a partial enlarged view of A part in the middle.

[0047] Figure 11 is a structure schematic view of the forklift and the pier mold cooperation provided by the embodiment of the utility model.

[0048] Figure 12 is a flow chart of the construction method of the support wall body of the quick along empty roadway leaving provided by the embodiment of the utility model.

[0049] Figure 13 is the construction effect overhead view of the support wall body of the quick along empty roadway leaving provided by the embodiment of the utility model.

[0050] Reference signs:

[0051] 10, outer cylinder body;11, first cylinder section;110, first end;12, second cylinder section;120, second end;121, limiting groove;13, first reinforcing ring;14, second reinforcing ring;140, clamping part;141, pouring hole;20, flexible mold bag;200, pouring opening;30, adjuster;31, elastic plate;32, barb;33, main body part;34, reinforcing part;35, second positioning hole;36, scale;40, driving structure;41, rope;50, forklift;60, goaf;61, roadway;62, construction position;63, steel mesh and sealing part;64, concrete pump;65, pumping pipe;66, hydraulic unit support;67, gangue blocking support;68, transition support;69, end support;70, to-be-mined area. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be described clearly and completely in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0053] In order to better understand the rapid gob-side entry retaining pier column mold provided by the embodiments of the utility model, firstly, the application background thereof is introduced. The existing gob-side entry retaining technology is mainly divided into two categories. One is to pour a concrete wall on one side of the goaf. The other is to pour a concrete pier on one side of the goaf. The outer constraint steel pipe of the steel pipe concrete pier can not only act as a formwork during the pouring of concrete, but also can provide constraint for the internal concrete.

[0054] However, due to the inconsistency of the height of the underground roadway, the standard size of the outer constraint steel pipe is difficult to adapt to the fluctuation of the height of the roadway. Generally, different lengths of the outer constraint steel pipe need to be customized according to the change of the height of the roadway, or additional top joint medium is used to independently perform the top joint work, which leads to poor actual construction convenience and low overall top joint efficiency. In addition, due to the vertical setting of the outer constraint steel pipe, the outer constraint steel pipe and the roadway roof will inevitably have a certain gap and cannot be completely jointed due to the limitation of the diagonal length. The flexible form of the pump-charged concrete will bulge outward from the top gap to form a mushroom head, which leads to that the pressure of the pressure joint cannot be too large (the flexible form will explode if the pressure is too large), which is not conducive to bearing.

[0055] In view of the above problems, the embodiments of the utility model provide a rapid gob-side entry retaining pier column mold, which can conveniently and efficiently realize complete top joint of the concrete pier and ensure the bearing performance thereof.

[0056] The rapid gob-side entry retaining pier column mold of the utility model will be described below in combination with Figures 1-13 The rapid gob-side entry retaining pier column mold of the utility model.

[0057] Referring to Figures 1 to 4 A rapid gob-side entry retaining pier column mold, comprising an outer cylinder 10, a flexible form bag 20 and an adjuster 30. The outer cylinder 10 comprises at least two cylinder sections coaxially nested, and the cylinder sections are axially slidingly matched, so that the outer cylinder 10 can be axially telescopic. The flexible form bag 20 is arranged inside the outer cylinder 10 and one end thereof is exposed from the end of the outer cylinder 10, and the flexible form bag 20 is provided with a pouring port 200. The adjuster 30 is arranged between the adjacent cylinder sections and is suitable for positioning the adjacent cylinder sections according to the preset length of the outer cylinder 10.

[0058] In actual application, the pier column mold is adopted to solve the problems of large filling amount, high filling cost and slow roadway leaving speed of the existing wall body pouring and filling along the goaf, is suitable for large mines with fast working face advancing, the outer cylinder 10 can be extended in the axial direction by making the cylinder segments slide in the axial direction, so that the axial length of the outer cylinder 10 is adjusted, the outer cylinder 10 can better adapt to the fluctuating height of the roadway, the pier column mold of the same specification is universal in the whole roadway 61, and it is not necessary to customize pier column molds of different length specifications, and it is not necessary to use additional top connecting medium to independently perform top connecting work, and the convenience of construction and the top connecting efficiency are improved; meanwhile, after the pier column mold is erected, the axial length of the outer cylinder 10 can be adjusted to ensure that the top and bottom ends of the pier column mold are in complete contact with the roof and floor of the roadway 61, zero-gap complete top connection is realized, and the bearing performance is ensured; in addition, when the pier column mold is transported, the outer cylinder 10 can be in a contracted state, occupies a smaller transportation space, and the single transportation efficiency of the same volume of transportation vehicle is higher.

[0059] In some optional embodiments, the specific material of the outer cylinder 10 can be selected according to actual needs, as long as it meets the required structural strength, for example, steel can be used, and the specific size specification of the outer cylinder 10 can be flexibly designed in combination with the actual construction scene, which is not specifically limited in the embodiments of the present application.

[0060] In addition, the outer cylinder 10 can be a polygonal column structure or a cylindrical structure, as long as the cylinder segments can slide in the axial direction to realize the axial extension and contraction of the outer cylinder 10. The outer cylinder 10 includes at least two coaxially nested cylinder segments, for example, the outer cylinder 10 can be composed of two coaxially nested cylinder segments with different diameters, or the outer cylinder 10 can be composed of more than three coaxially nested cylinder segments with different diameters, and the specific design can be flexibly designed in combination with the actual height of the roadway 61. The top end of the flexible mold bag 20 is exposed from the top end of the uppermost cylinder segment, which is used for top connecting after pumping the concrete.

[0061] In order to ensure the fluency of the extension and contraction of the outer cylinder 10 and the convenience of operation, in one of the embodiments of the present application, the outer cylinder 10 is taken as an example, the outer cylinder 10 includes two coaxially nested cylinder segments, after the pier column mold is erected, the cylinder segment with a larger diameter is located below, and the cylinder segment with a smaller diameter is located above.

[0062] In order to facilitate understanding and description, in one of the embodiments of the present application, the above-mentioned cylinder segment includes a first cylinder segment 11 and a second cylinder segment 12, wherein the inner diameter of the first cylinder segment 11 is greater than the outer diameter of the second cylinder segment 12, the first cylinder segment 11 is located below the erected pier column mold, the second cylinder segment 12 is slidably inserted into the first cylinder segment 11 and is located above the erected pier column mold, and the top end of the flexible mold bag 20 is exposed from the top of the second cylinder segment 12.

[0063] Specifically, a plurality of connection sites are arranged along the axial direction of the first cylinder section 11, and the adjuster 30 is detachably connected to the first cylinder section 11 at different connection sites, so as to adjust the installation position of the adjuster 30 in the axial direction of the first cylinder section 11, and the second cylinder section 12 is positioned by the adjuster 30, so as to position the second cylinder section 12 at different positions in the axial direction of the first cylinder section 11, and the axial length of the outer cylinder body 10 is adjusted.

[0064] In an embodiment of the utility model, referring to Figure 4 and Figure 5 , the adjuster 30 at least comprises a plurality of elastic plates 31; the plurality of elastic plates 31 are arranged in the first cylinder section 11 and arranged in a ring structure around the axis of the first cylinder section 11, and the inner diameter of the ring structure is greater than the outer diameter of the second cylinder section 12; one end of the elastic plate 31 towards the inside of the first cylinder section 11 is provided with a barb 32, the barb 32 is bent towards the axis direction of the ring structure, and the ring diameter formed by the plurality of barbs 32 is smaller than the inner diameter of the second cylinder section 12.

[0065] In this way, referring to Figures 6 to 9 , when the second cylinder section 12 is inserted into the first cylinder section 11 through the above-mentioned ring structure, the barb 32 of the elastic plate 31 abuts against the outer wall of the second cylinder section 12, and the elastic plate 31 is elastically deformed towards the direction away from the axis of the first cylinder section 11; when the second cylinder section 12 is slid along the axial direction of the first cylinder section 11 and the bottom end of the second cylinder section 12 completely enters the above-mentioned ring structure, the barb 32 is separated from the outer wall of the second cylinder section 12, and the deformation of the barb 32 is restored towards the axis direction of the first cylinder section 11; the barb 32 is hooked and supported on the bottom end of the second cylinder section 12, so that the second cylinder section 12 is maintained stable, and the positioning of the second cylinder section 12 is realized.

[0066] In an embodiment of the utility model, the adjuster 30 further comprises a ring-shaped main body 33, the inner diameter of the main body 33 is greater than the outer diameter of the second cylinder section 12, and preferably matches the diameter of the above-mentioned ring structure; the other end of the elastic plate 31 relative to the barb 32 is connected to the main body 33; the plurality of elastic plates 31 are connected as a whole through the above-mentioned main body 33, and the ring structure formed by the plurality of elastic plates 31 is coaxial with the main body 33. In this way, the connection of the adjuster 30 with the first cylinder section 11 and the adjustment of the connection position can be facilitated.

[0067] The size specification of the adjuster 30 can be flexibly designed according to the size specification of the outer cylinder body 10, and the specific material, thickness and forming method of the adjuster 30 can be selected according to actual needs, such as the required supporting strength.

[0068] In one embodiment of the utility model, the adjuster 30 is integrally formed, specifically, a plurality of square holes can be used to divide a ring-shaped component with a thickened bottom end into a plurality of equal parts in the circumferential direction, thereby forming the above-mentioned ring-shaped adjuster 30.

[0069] In one embodiment of the utility model, the adjuster 30 is integrally formed, specifically, a plurality of square holes can be used to divide a ring-shaped component with a thickened bottom end into a plurality of equal parts in the circumferential direction, thereby forming the above-mentioned ring-shaped adjuster 30.

[0070] In order to conveniently adjust the connection position of the adjuster 30 on the first cylinder section 11, in one embodiment of the utility model, referring to Figure 4 and 10 , a first positioning hole is arranged on the first cylinder section 11, and a plurality of second positioning holes 35 are arranged on the adjuster 30 in the axial direction; the first positioning hole can be corresponded to the second positioning holes 35 in different positions respectively with the axial movement of the adjuster 30, thereby forming the above-mentioned plurality of connection points. The pier mold further comprises a positioning member, which is suitable for sequentially penetrating through the first positioning hole and the second positioning hole 35, thereby positioning the first cylinder section 11 and the adjuster 30.

[0071] In actual application, according to the preset length of the outer cylinder body 10, the adjuster 30 can be axially slid, the first positioning hole on the first cylinder section 11 can be corresponded to the second positioning hole 35 in a specific position on the adjuster 30, then the positioning member can be sequentially penetrated through the first positioning hole and the second positioning hole 35 to position the first cylinder section 11 and the adjuster 30, thereby adjusting the position of the adjuster 30 on the first cylinder section 11; after the adjuster 30 is adjusted to a predetermined position, a forklift 50 or other equipment can be used to axially pull the second cylinder section 12 to make the second cylinder section 12 axially slide; when the bottom end of the second cylinder section 12 enters the inside of the adjuster 30, the elastic plate 31 of the adjuster 30 can restore the deformation towards the axis direction of the first cylinder section 11, so that the barb 32 can be hung and supported on the bottom of the second cylinder section 12, thereby positioning the second cylinder section 12 in the axial direction, thereby realizing the adjustment of the preset length of the outer cylinder body 10.

[0072] Specifically, the first positioning hole is arranged around the axis of the first cylinder section 11, and the second positioning hole 35 is arranged in a plurality of groups along the axial direction of the adjuster 30, and a plurality of second positioning holes 35 in each group are arranged around the adjuster 30. Through the plurality of first positioning holes and the second positioning holes 35, the stability of the connection of the adjuster 30 on the first cylinder section 11 can be improved.

[0073] In one embodiment of the utility model, the positioning member can be a bolt, and the bolt can be sequentially penetrated through the first positioning hole and the second positioning hole 35 to realize the connection of the first cylinder section 11 and the adjuster 30.

[0074] In one embodiment of the utility model, the position corresponding to the second positioning hole 35 on the adjuster 30 is provided with a scale 36, which is used for displaying the axial length of the outer cylinder body 10 corresponding to the second positioning hole 35 at different positions. Specifically, when the position of the adjuster 30 is adjusted along the axial direction, different scales 36 will be exposed with the first cylinder section 11 along with the second positioning hole 35. Each scale 36 represents the axial length of the outer cylinder body 10 in the elongated state. The length of the outer cylinder body 10 can be obtained by the scale 36, which omits the measurement work, saves the working steps, and reduces the working intensity.

[0075] In one embodiment of the utility model, the first cylinder section 11 is fixedly connected with the first reinforcing ring 13 at one end for matching the second cylinder section 12. The structural strength and the hoop constraint force of the top end of the first cylinder section 11 can be increased by arranging the first reinforcing ring 13.

[0076] In some optional embodiments, the first reinforcing ring 13 can be fixedly connected to the outer periphery of the first cylinder section 11 in a welding manner, or can be fixedly connected to the outer periphery of the first cylinder section 11 by using a rivet, a bolt or the like, which can be selected according to actual needs.

[0077] Specifically, the position of the first reinforcing ring 13 corresponds to the position of the first positioning hole, and the first positioning hole penetrates the first reinforcing ring 13 and the cylinder wall of the first cylinder section 11 in sequence.

[0078] In one embodiment of the utility model, the second cylinder section 12 is fixedly connected with the second reinforcing ring 14 at one end for the flexible mold bag 20 to pass out. The structural strength of the top end of the second cylinder section 12 can be increased by arranging the second reinforcing ring 14, so as to enhance the stability and the hoop constraint force of the second cylinder section 12, and effectively avoid the problem of pressure burst at the top of the pier column.

[0079] In some optional embodiments, the second reinforcing ring 14 can be fixedly connected to the outer periphery of the second cylinder section 12 in a welding manner, or can be fixedly connected to the outer periphery of the second cylinder section 12 by using a rivet, a bolt or the like, which can be selected according to actual needs.

[0080] Specifically, referring to Figure 11 , the end of the second reinforcing ring 14 away from the first cylinder section 11 is formed with a clamping portion 140 along the radial direction. The clamping portion 140 can provide a fulcrum for the forklift 50 and the like, so as to facilitate the axial movement of the second cylinder section 12 by means of the forklift 50 and the like to adjust the axial length of the outer cylinder body 10.

[0081] In one embodiment of the utility model, the outer cylinder 10 is provided with a pouring hole 141 corresponding to the pouring opening 200, the pouring hole 141 penetrates the second reinforcing ring 14, and the pouring opening 200 is led out from the pouring hole 141, so as to pump concrete into the flexible mold bag 20 of the pier column mold through the pouring opening 200.

[0082] In actual work, according to the preset length of the outer cylinder 10, the position of the adjuster 30 is adjusted along the axial direction, the adjuster 30 is adjusted to the preset position, the fork truck 50 or other equipment is used to apply force to the clamping part 140 at the top end of the second reinforcing ring 14, the second cylinder section 12 is pulled to make the second cylinder section 12 slide along the axial direction, the barb 32 of the adjuster 30 is hooked and supported at the bottom of the second cylinder section 12 after being adjusted to the predetermined position, so as to position the second cylinder section 12 along the axial direction, thereby realizing the adjustment of the preset length of the outer cylinder 10, and then pumping concrete into the pier column mold through the pouring opening 200 until the flexible mold bag 20 is completely connected to the top.

[0083] However, due to the complex construction environment of the underground roadway 61, sometimes the large operation equipment such as the fork truck 50 is difficult to operate in the roadway 61, resulting in difficulty in adjusting the height of the pier column mold.

[0084] In order to solve the above problems, in one embodiment of the utility model, referring to Figure 4 and Figure 6 , the pier column mold further comprises a driving structure 40 for driving the second cylinder section 12 to slide along the axial direction relative to the first cylinder section 11. Specifically, one end of the first cylinder section 11 for matching the second cylinder section 12 is the first end 110, and one end of the second cylinder section 12 towards the first cylinder section 11 is the second end 120; the driving structure 40 comprises a rope 41 penetrating the first end 110 side along the radial direction, the rope 41 is in sliding fit with the first cylinder section 11 and is supported at the second end 120.

[0085] In actual application, the rope 41 can be pulled by manual pulling or using winding equipment such as a winch, during the process of pulling the rope 41, the part located in the first cylinder section 11 will move towards the first end 110 of the first cylinder section 11 (i.e. the top end of the first cylinder section 11), thereby dragging the second end 120 of the second cylinder section 12 to move towards the first end 110 of the first cylinder section 11, so that the second cylinder section 12 slides along the axial direction relative to the first cylinder section 11, and the elongation of the outer cylinder 10 along the axial direction is realized.

[0086] In some optional embodiments, the rope 41 can pass through opposite sides of the first end 110 in the radial direction, so that the second barrel section 12 is dragged to slide in the axial direction by applying force to both ends of the rope 41. Alternatively, one end of the rope 41 can pass through one side of the first end 110 in the radial direction, and the other end can be fixedly connected to the first barrel section 11, so that the second barrel section 12 is dragged to slide in the axial direction by applying force to only one end of the rope 41. In addition, the rope 41 can be arranged in one or more than two in a cross manner, and the rope 41 can be made of steel wire rope or other materials that meet the required support strength, which can be selected according to actual needs.

[0087] In the embodiment, the rope 41 is a steel wire rope, one end of which is fixedly connected to the first barrel section 11, and the other end passes through one side of the first end 110 in the radial direction.

[0088] In an embodiment of the utility model, the second end 120 is provided with a radial limiting groove 121, and the rope 41 is slidably embedded in the limiting groove 121. The limiting groove 121 can limit the rope 41, avoid the radial swing of the rope 41 during the pulling process, make the supporting force of the rope 41 always located at the middle position of the bottom of the second barrel section 12, ensure the uniform stress of the second barrel section 12, and improve the smoothness and stability of the sliding of the second barrel section 12.

[0089] Specifically, the limiting groove 121 passes through the second end 120 of the second barrel section 12 in the axial direction, so as to facilitate the cooperation between the rope 41 and the limiting groove 121.

[0090] It can be understood that, without contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples.

[0091] The construction method of the rapid along-empty roadway supporting wall provided by the utility model will be described below. The construction method of the rapid along-empty roadway supporting wall described below can be correspondingly referred to the rapid along-empty roadway supporting column mold described above.

[0092] Referring to Figure 12 and Figure 13 , a construction method of a rapid along-empty roadway supporting wall, comprising the following steps:

[0093] Step S10, providing the rapid along-empty roadway supporting column mold described in any of the above embodiments, and transporting various construction materials to the construction position 62 in the underground.

[0094] Specifically, after the parts of the supporting column mold are produced and manufactured in the factory, the supporting column mold is assembled on the ground to form the supporting column mold, and then the supporting column mold, the steel mesh, the sealing cloth and other construction materials are transported to the construction position 62 in the underground roadway 61.

[0095] Step S11, net sealing, close to the goaf 60 along the top hanging steel mesh and sealing cloth, and leveling treatment to the construction position 62.

[0096] Step S12, vertical setting mold, placing the pier mold in order, driving the relative motion of the cylinder segment to make the outer cylinder 10 elongate and top.

[0097] Specifically, after the pier mold is placed in order, the outer cylinder 10 is elongated and topped by lifting with a forklift 50, or is elongated and topped by winding with a winch or other winding equipment.

[0098] Step S13, pumping concrete, pumping concrete into the pier mold until the flexible mold bag 20 is completely topped.

[0099] Specifically, the concrete pump 64 is connected with the pouring opening 200 through the pumping pipe 65, and the concrete is pumped into the flexible mold bag 20 through the pouring opening 200 until the flexible mold bag 20 is completely topped.

[0100] Step S14, spraying sealing material, after the concrete is solidified, a load-bearing closed roadway retaining wall is formed.

[0101] Step S15, repeating the above steps S11 to S14 until the construction is completed.

[0102] Specifically, referring to Figure 13 , the arrow in the figure is the advancing direction of the working face, and as the working face advances to the to-be-mined area 70, the area mined behind forms a new goaf 60. After a certain distance of construction, the hydraulic unit support 66, the gangue blocking support 67, the transition support 68 and the end support 69 are moved forward, and the above steps of net sealing, mold setting, concrete pumping and sealing material spraying are repeated until the construction is completed.

[0103] It should be pointed out that the hydraulic unit support 66, the gangue blocking support 67, the transition support 68 and the end support 69 are common support devices in coal mines, and their specific structure and working principle can refer to the prior art. These support devices are not the main point of the present application, and the support devices are not improved in the embodiment of the present application, so they are not described here.

[0104] The quick gob-side entry retaining pier column mold provided by the embodiment of the utility model adopts the pier column mold, solves the problems of large filling amount, high filling cost and slow entry retaining speed of the existing gob-side entry retaining wall body, is applicable to large mines with quick working face advancing, can make the outer cylinder 10 stretch and contract along the axial direction by making the cylinder section slide in the axial direction, thereby adjusting the axial length of the outer cylinder 10, making the outer cylinder 10 better adapt to the fluctuating entry height, realizing the full entry 61 generalization of the pier column mold of the same specification, without the need of customizing pier column molds of different length specifications, and without the need of using additional top-connection medium to independently perform top-connection work, thereby improving the convenience and top-connection efficiency of construction; meanwhile, after the pier column mold is vertically set, the axial length of the outer cylinder 10 can be adjusted to ensure that the top and bottom ends of the pier column mold are completely in contact with the roof and floor of the entry 61, realize zero-gap complete top-connection, and ensure the bearing performance; in addition, when the pier column mold is transported, the outer cylinder 10 can be in a contracted state, occupy a smaller transportation space, and the same volume of transport vehicle has higher single-transport efficiency.

[0105] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A rapid along empty roadway prop column mold, characterized in that, The utility model relates to a telescopic outer cylinder for pouring concrete, comprising: an outer cylinder (10) comprising at least two coaxially nested cylinder segments that are axially slidingly fitted to allow the outer cylinder (10) to axially expand and contract; a flexible formwork bag (20) arranged inside the outer cylinder (10) and having one end exposed from the end of the outer cylinder (10), the flexible formwork bag (20) being provided with a pouring opening (200); an adjuster (30) arranged between adjacent cylinder segments and adapted to position the adjacent cylinder segments according to a preset length of the outer cylinder (10).

2. The rapid longwall pillar-pillar module of claim 1, wherein, The cylinder segments comprise a first cylinder segment (11) and a second cylinder segment (12), and the first cylinder segment (11) is sleeved outside the second cylinder segment (12); a plurality of connection sites are provided between the first cylinder segment (11) and the adjuster (30), and the plurality of connection sites are arranged along the axial direction of the first cylinder segment (11), the adjuster (30) and the first cylinder segment (11) can be detachably connected at different connection sites, and the second cylinder segment (12) is positioned at different axial positions of the first cylinder segment (11).

3. The rapid longwall pillar-pillar module of claim 2, wherein, The adjuster (30) comprises at least a plurality of elastic plates (31); the plurality of elastic plates (31) are arranged in the first cylinder segment (11) and arranged in a ring structure around the axis of the first cylinder segment (11), and the inner diameter of the ring structure is greater than the outer diameter of the second cylinder segment (12); the elastic plate (31) is provided with a barb (32) at one end towards the first cylinder segment (11), and the barb (32) is bent towards the axis of the ring structure.

4. The rapid pillar for gob-side entry retaining of claim 3, wherein, The adjuster (30) further comprises a ring-shaped main body (33), and the other end of the elastic plate (31) relative to the barb (32) is connected to the main body (33), and the plurality of elastic plates (31) are connected as a whole through the main body (33).

5. The rapid, longwall, pillar-only, mining, support, installation, as set forth in any one of claims 1 through 4, wherein, The first cylinder segment (11) is provided with a first positioning hole, the adjuster (30) is provided with a plurality of second positioning holes (35) arranged along the axial direction, and the first positioning hole can correspond to different positions of the second positioning hole (35) with the axial movement of the adjuster (30), thereby forming a plurality of connection sites; further comprising a positioning member adapted to sequentially pass through the first positioning hole and the second positioning hole (35) to position the first cylinder segment (11) and the adjuster (30).

6. The rapid pillar for gob-side entry retaining mold according to claim 5, characterized in that, The adjuster (30) is provided with a scale (36) at a position corresponding to the second positioning hole (35) to display the axial length of the outer cylinder (10) corresponding to different positions of the second positioning hole (35).

7. The rapid pillar for gob-side entry retaining of claim 3, wherein, The first cylinder segment (11) is fixedly connected with a first reinforcing ring (13) at one end for matching the second cylinder segment (12); and / or, the outer cylinder (10) is fixedly connected with a second reinforcing ring (14) at one end for exposing the end of the flexible formwork bag (20).

8. The rapid pillar for gob-side entry retaining of claim 2, wherein, The first barrel section (11) is used for matching one end of the second barrel section (12) as a first end (110), and the end of the second barrel section (12) towards the first barrel section (11) as a second end (120); Further comprising a driving structure (40) for driving the second barrel section (12) to slide axially relative to the first barrel section (11); the driving structure (40) comprises a rope (41) penetrating through the side of the first end (110) in the radial direction; the rope (41) is in sliding fit with the first barrel section (11) and bears on the second end (120).

9. The rapid pillar for gob-side entry retaining of claim 8, wherein, The second end (120) is provided with a radial limiting groove (121), and the rope (41) is slidably embedded in the limiting groove (121).

10. The rapid pillar for gob-side entry retaining of claim 7, wherein, The outer barrel body (10) is provided with a pouring hole (141) corresponding to the position of the pouring port (200), the pouring hole (141) penetrates through the second reinforcing ring (14), and the pouring port (200) is led out by the pouring hole (141).

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