Multifunctional coal mine filling sealing bag for rapid deployment and preparation method

Abstract

The invention provides a multifunctional coal mine filling and sealing bag for rapid deployment and a preparation method thereof, and the method comprises the following steps: step 1, taking high-strength flame-retardant polypropylene filament yarns and / or carbon black modified polypropylene conductive filaments as warp and weft yarns, the multifunctional woven fabric with good mechanical property, flame retardant property, antistatic property and draining property is woven. Secondly, the multifunctional woven fabric obtained in the first step is sewn and processed into a double-layer multifunctional filling sealing bag, the inner layer of the bag is used for being filled with slurry, a polyvinyl chloride inflation air column is arranged in the outer layer of the bag, rapid laying of the bag is completed in a self-standing mode by means of supporting of the polyvinyl chloride inflation air column during inflation, and then the bag is prepared. The multifunctional coal mine filling sealing bag prepared by the preparation method has good mechanical property, flame retardant property and antistatic property at the same time, and the safety of filling operation can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of functional materials technology, and relates to coal mine filling, specifically to a multifunctional coal mine filling sealing bag for rapid deployment and its preparation method. Background Technology

[0002] Sealed bag filling technology is an effective method to improve the efficiency and safety of backfilling operations in coal mines. However, existing sealed bag filling technologies have two major drawbacks: First, the bags have a single function or lack essential safety features (such as flame retardancy and antistatic properties); second, most rely on anchor bolts for auxiliary support, resulting in low bag deployment efficiency, long deployment time, high construction intensity, poor filling stability, and insufficient containment and shaping capabilities. These drawbacks directly affect the speed of the filling operation and the overall filling effect. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a multifunctional coal mine filling and sealing bag for rapid deployment and its preparation method, thereby solving the technical problem in the prior art where it is difficult to simultaneously improve safety and deployment efficiency when using the bag.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A method for preparing a multifunctional coal mine filling and sealing bag for rapid deployment, the method comprising the following steps:

[0006] Step 1: Using high-strength flame-retardant polypropylene filaments and / or carbon black-modified conductive polypropylene filaments as warp and weft yarns, weave a multifunctional woven fabric with good mechanical properties, flame retardant properties, antistatic properties and water-repellent properties.

[0007] Step 2: The multifunctional woven fabric obtained in Step 1 is sewn and processed into a double-layered multifunctional filling and sealing bag. The inner layer of the bag is used to fill the slurry, and the outer layer of the bag has a PVC inflatable column inside. The bag is quickly deployed by relying on the support of the PVC inflatable column when it is inflated.

[0008] The present invention also has the following technical features:

[0009] Specifically, in step one, the high-strength flame-retardant polypropylene filament has a specification of 400D and / or 1200D; the carbon black modified polypropylene conductive filament has a specification of 400D.

[0010] Specifically, in step one, when the specification of the high-strength flame-retardant polypropylene filament is 400D, the warp density of the multi-functional woven fabric is 95-105 threads / 10cm, and the weft density of the multi-functional woven fabric is 65-85 threads / 10cm.

[0011] Specifically, in step one, when the specification of the high-strength flame-retardant polypropylene filament is 1200D, the warp density and weft density of the multifunctional woven fabric are both 2 to 7 threads / 10cm.

[0012] Specifically, in step one, when the specification of the carbon black modified polypropylene conductive filament is 400D, the warp density and weft density of the multifunctional woven fabric are both 1 to 5 threads / 10cm.

[0013] Specifically, in step one, the fabric coverage coefficient of the multifunctional woven fabric is 85-88%, and the width of the multifunctional woven fabric is 1.5m.

[0014] Specifically, in step two, the stitch density during the stitching process is 10 stitches / 10cm.

[0015] The present invention also protects a multifunctional coal mine filling and sealing bag for rapid deployment, the bag comprising an inner bag layer and multiple outer bag pockets, the multiple outer bag pockets being sewn onto the circumferential outer surface of the inner bag layer.

[0016] The inner layer of the bag includes a closed inner layer body sewn together. The inner layer body also has a cavity for containing filling slurry. The inner layer body also has an injection port that is connected to the cavity inside the inner layer body.

[0017] The cavity formed by the inner surface of the outer pocket of each bag and the outer surface of the inner layer of the bag is an air column mounting cavity. The top or bottom of the air column mounting cavity is open, and a polyvinyl chloride inflatable air column can be installed inside the air column mounting cavity.

[0018] Specifically, the inner layer of the bag is a rectangular structure formed by connecting and sewing together the front, rear, left, right, top, and bottom surfaces.

[0019] The top surface is provided with an injection port, which is connected to the internal cavity of the inner layer of the bag body.

[0020] Specifically, the multiple outer pockets of the pouch are discontinuously and uniformly arranged circumferentially along the outer surface of the inner layer of the pouch, and each outer pocket of the pouch is arranged vertically.

[0021] Each of the aforementioned air column mounting cavities is rectangular in shape.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] (I) The multifunctional coal mine filling and sealing bag prepared by the preparation method of the present invention has good mechanical properties, flame retardant properties and antistatic properties, which can effectively improve the safety of filling operations.

[0024] (II) The device in this invention achieves rapid deployment by using the inner layer of the bag, the outer layer of the bag, and the polyvinyl chloride inflatable column of the support body. It has the advantages of simple operation, low cost and safety and reliability, and is suitable for rapid deployment applications. Attached Figure Description

[0025] Figure 1(a) is a photograph of the base fabric prepared under the conditions of Example 1.

[0026] Figure 1(b) is a photograph of the base fabric containing 1200D reinforcing ribs prepared under the conditions of Example 2.

[0027] Figure 1(c) is a photograph of the carbon black modified fabric with 1200D reinforcing ribs prepared under the conditions of Example 3.

[0028] Figure 2(a) shows the tensile strength-elongation curve of the base fabric prepared under the conditions of Example 1.

[0029] Figure 2(b) shows the tensile strength-elongation curve of the base fabric with 1200D reinforcing ribs prepared under the conditions of Example 2.

[0030] Figure 2(c) is a bar chart of tensile strength-elongation of the base fabric prepared under the conditions of Example 1 and the base fabric with 1200D reinforcing ribs prepared under the conditions of Example 2.

[0031] Figure 3 The results show the antistatic properties of the base fabric with 1200D reinforcing ribs prepared under the conditions of Example 2 and the carbon black modified fabric with 1200D reinforcing ribs prepared under the conditions of Example 3.

[0032] Figure 4(a) is a photograph of the carbon black modified fabric with 1200D reinforcing ribs prepared under the conditions of Example 3 during the flame retardant performance test.

[0033] Figure 4(b) is a photograph of the carbon black modified fabric with 1200D reinforcing ribs prepared under the conditions of Example 3 before the flame retardant performance test.

[0034] Figure 4(c) is a photograph of the carbon black modified fabric with 1200D reinforcing ribs prepared under the conditions of Example 3 after flame retardant performance testing.

[0035] Figure 5(a) is a schematic diagram of the three-dimensional structure of the sac.

[0036] Figure 5(b) is a schematic diagram of the main structure of the sac.

[0037] Figure 5(c) is a schematic diagram of the left-side structure of the sac.

[0038] Figure 5(d) is a top view of the sac structure.

[0039] The meanings of the labels in the diagram are as follows: 1-inner layer of the pouch, 2-outer layer of the pouch, 3-air column mounting cavity.

[0040] 101 - Inner layer of the capsule body; 102 - Filling port.

[0041] 10101 - Front facade, 10102 - Rear facade, 10103 - Left side facade, 10104 - Right side facade, 10105 - Top facade, 10106 - Bottom facade.

[0042] The specific content of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, all equipment and raw materials used in this invention are those known in the prior art. For example, the 400D high-strength flame-retardant polypropylene filament uses known 400D high-strength flame-retardant polypropylene filament; the 1200D high-strength flame-retardant polypropylene filament uses known 1200D high-strength flame-retardant polypropylene filament; the 400D carbon black modified polypropylene conductive filament uses known 400D carbon black modified polypropylene conductive filament; and the polyvinyl chloride uses commonly used polyvinyl chloride known in the art. The compression pump uses a known compression pump.

[0044] In this invention, the OXYZ coordinate system is a three-dimensional rectangular coordinate system, with the X-axis pointing horizontally to the right; the Y-axis pointing vertically to the rear; and the Z-axis pointing vertically upwards.

[0045] In this invention, "D" is an abbreviation for "Denier," which is a unit for measuring the linear density (fineness) of fibers or filaments.

[0046] In this invention, warp density refers to the warp density of the loom and weft density refers to the weft density of the loom.

[0047] The bag in this invention can be used for rapid deployment and filling operations behind coal mine frames.

[0048] In this invention, warp and weft yarns refer to warp yarns and weft yarns.

[0049] Following the above technical solutions, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0050] Example 1:

[0051] This embodiment provides a method for preparing a multifunctional coal mine filling and sealing bag for rapid deployment. The preparation method includes the following steps:

[0052] Step 1: Using 400D high-strength flame-retardant polypropylene filament as warp and weft yarns, weave a multifunctional woven fabric with good mechanical properties, flame retardant properties, antistatic properties and water-draining properties.

[0053] In step one, when the specification of the high-strength flame-retardant polypropylene filament is 400D, the warp density of the multi-functional woven fabric is 102 threads / 10cm, and the weft density of the multi-functional woven fabric is 70 threads / 10cm.

[0054] In step one, the fabric coverage coefficient of the multifunctional woven fabric is 86%, and the width of the multifunctional woven fabric is 1.5m.

[0055] In this embodiment, the multifunctional woven fabric obtained in step one is also called the "base fabric".

[0056] In this embodiment, the unit area mass of the multifunctional woven fabric obtained in step one is 350 g / m². 2 .

[0057] In this embodiment, the multifunctional woven fabric is processed by a rapier loom with a 1 / 1 plain weave; the rapier loom is a commonly used rapier loom known in the art; "1 / 1 plain weave" refers to the warp and weft yarns interlacing in a "one up, one down" pattern.

[0058] Step 2: The multifunctional woven fabric obtained in Step 1 is sewn and processed into a double-layered multifunctional filling and sealing bag. The inner layer 1 of the bag is used to fill the slurry, and the outer pocket 2 of the bag contains a polyvinyl chloride (PVC) air column. The bag is quickly deployed by relying on the support of the PVC air column when it is inflated.

[0059] In step two, the stitch density during the suturing process is 10 stitches / 10cm.

[0060] In this embodiment, the slurry used is a commonly known slurry in the art; the polyvinyl chloride air column used is a commonly known polyvinyl chloride air column in the art.

[0061] Example 2:

[0062] This embodiment provides a method for preparing a multifunctional coal mine filling and sealing bag for rapid deployment. The preparation method is basically the same as that in Embodiment 1, except that: in step one, while using 400D high-strength flame-retardant polypropylene filament as warp and weft yarns, 1200D high-strength flame-retardant polypropylene filament is also used for weaving; in step one, when the specification of the high-strength flame-retardant polypropylene filament is 1200D, the warp density and weft density of the multifunctional woven fabric are both 3 threads / 10cm; in this embodiment, the multifunctional woven fabric obtained in step one is also called "base fabric with 1200D reinforcing ribs".

[0063] In step one of this embodiment (i.e., embodiment 2), the unit area mass of the obtained multifunctional woven fabric is 370 g / m². 2 .

[0064] Example 3:

[0065] This embodiment provides a method for preparing a multifunctional coal mine filling and sealing bag for rapid deployment. This method is basically the same as the method in Embodiment 2, except that in step one, "400D high-strength flame-retardant polypropylene filament" is replaced with "400D carbon black modified polypropylene conductive filament". That is, in step one of this embodiment, 1200D high-strength flame-retardant polypropylene filament is used as both warp and weft yarns while using 400D carbon black modified polypropylene conductive filament as warp and weft yarns for interlacing. In step one, when the specification of the carbon black modified polypropylene conductive filament is 400D, the warp density and weft density of the multifunctional woven fabric are both 2 threads / 10cm. In this embodiment, the multifunctional woven fabric obtained in step one is also called "carbon black modified fabric with 1200D reinforcing ribs".

[0066] In step one of this embodiment (i.e., embodiment 3), the unit area mass of the obtained multifunctional woven fabric is 380 g / m². 2 .

[0067] Figure 1(a) is a photograph of the multifunctional woven fabric prepared under the conditions of Example 1, i.e., the "base fabric". As can be seen from Figure 1(a), the base fabric is a plain weave with a smooth and clean surface.

[0068] Figure 1(b) is a photograph of the multifunctional woven fabric prepared under the conditions of Example 2, namely, the photograph of the "base fabric with 1200D reinforcing ribs". As can be seen from Figure 1(b), when a single 1200D high-strength flame-retardant polypropylene filament and a 400D high-strength flame-retardant polypropylene filament are used as warp and weft yarns at the same time, they form a stable interweaving.

[0069] Figure 1(c) is a photograph of the multifunctional woven fabric prepared under the conditions of Example 3, namely, the photograph of the "carbon black modified fabric with 1200D reinforcing ribs". Figure 1(c) shows two filaments with different spacing densities, namely 1200D high-strength flame-retardant polypropylene filaments and 400D carbon black modified polypropylene conductive filaments.

[0070] Figure 2(a) is the tensile strength-elongation curve of the base fabric prepared under the conditions of Example 1; Figure 2(b) is the tensile strength-elongation curve of the base fabric with 1200D reinforcing ribs prepared under the conditions of Example 2; Figure 2(c) is a bar chart of the tensile strength-elongation of the base fabric prepared under the conditions of Example 1 and the base fabric with 1200D reinforcing ribs prepared under the conditions of Example 2. The tensile strength-elongation test method adopted was GB / T 3923.1-2013 Textiles - Tensile Properties of Fabrics - Part 1: Determination of Breaking Strength and Elongation at Break (Strip Method).

[0071] As can be seen from Figures 2(a) and 2(c), the average warp tensile breaking strength of the multifunctional woven fabric without the addition of 1200D high-strength flame-retardant polypropylene filament, i.e. the base fabric obtained by using only 400D high-strength flame-retardant polypropylene filament, is 686.03N.

[0072] As can be seen from Figures 2(b) and 2(c), the base fabric with 1200D reinforcing ribs, obtained by adding 1200D high-strength flame-retardant polypropylene filaments at a density of 3 warp and 10cm, has a significantly improved warp tensile breaking strength, with the average tensile breaking strength increasing to 1013.09N. This meets the mechanical performance requirements for bags obtained by sewing multifunctional woven fabrics when filling with pastes or slurries.

[0073] Figure 3 The results show the antistatic properties of the base fabric with 1200D reinforcing ribs prepared under the conditions of Example 2 and the carbon black modified fabric with 1200D reinforcing ribs prepared under the conditions of Example 3. The antistatic properties were tested using GB / T 12703.5-2020 Evaluation of electrostatic properties of textiles—Part 5: Rotational mechanical friction method.

[0074] Depend on Figure 3It can be seen that the multifunctional woven fabric without 400D carbon black modified polypropylene conductive filament, i.e. the base fabric with 1200D reinforcing ribs obtained in Example 2, has an average friction voltage (FP) of 7939V; the carbon black modified fabric with 400D carbon black modified polypropylene conductive filament, i.e. the carbon black modified fabric with 1200D reinforcing ribs obtained in Example 3, has a significantly reduced friction voltage (FP), with an average value of 395V, and excellent antistatic performance (friction voltage (FP) ≤ 1000V is considered excellent antistatic performance), meeting the antistatic performance requirements of bags sewn from multifunctional woven fabrics for use in coal mines.

[0075] Figure 4(a) shows a photograph of the carbon black modified fabric with 1200D reinforcement prepared under the conditions of Example 3 during the flame retardant performance test. Figure 4(b) shows a photograph of the carbon black modified fabric with 1200D reinforcement prepared under the conditions of Example 3 before the flame retardant performance test (including horizontal and vertical burning). Figure 4(c) shows a photograph of the carbon black modified fabric with 1200D reinforcement prepared under the conditions of Example 3 after the flame retardant performance test (including horizontal and vertical burning). The test method adopted was the determination of vertical damage length, smoldering time, and afterflame time in the burning performance of textiles according to GB / T 5455-2014. The rating level was based on the evaluation index of decorative fabrics specified in GB / T17591-2006 Flame Retardant Fabrics.

[0076] Depend on Figures 4(a) to 4(c) As shown, the flame retardant performance (including flame retardant performance after horizontal burning and flame retardant performance after vertical burning) test results show that the maximum damage length is <65mm, the burning time and smoldering time are both 0s, the flame retardant performance reaches B1 level, which meets the flame retardant performance requirements of bags made of multifunctional woven fabric sewn together for use in coal mines.

[0077] Example 4:

[0078] This embodiment provides a multifunctional coal mine filling and sealing bag for rapid deployment, as shown in Figures 5(a) and 5(d). The bag includes an inner bag layer 1 and multiple outer bag pockets 2, which are sewn onto the circumferential outer surface of the inner bag layer 1.

[0079] The inner layer 1 of the bag includes a closed inner layer body 101 formed by sewing. The inner layer body 101 also has a cavity for containing filling slurry. The inner layer body 101 also has an injection port 102, which is connected to the cavity inside the inner layer body 101.

[0080] The cavity formed by the inner surface of the outer pocket 2 of each bag and the outer surface of the inner layer 1 of the bag is the air column mounting cavity 3. The top or bottom of the air column mounting cavity 3 is open, and a polyvinyl chloride inflatable air column can be installed in the air column mounting cavity 3.

[0081] In this embodiment, the inner layer 1 of the bag is a rectangular sealed structure that retains only the top filling port 102. The air column mounting cavity 3 contains a polyvinyl chloride (PVC) air column, and the inflation of the PVC air column enables the rapid deployment of filling and sealing the bag.

[0082] As a preferred embodiment, the inner layer body 101 of the pouch is a cuboid structure formed by connecting and sewing together the front face 10101, the rear face 10102, the left side face 10103, the right side face 10104, the top face 10105, and the bottom face 10106.

[0083] A filling port 102 is provided on the top surface 10105, and the filling port 102 is connected to the internal cavity of the inner layer body 101 of the bag.

[0084] As a preferred embodiment, multiple outer pockets 2 of the pouch are uniformly and intermittently arranged along the outer surface of the inner layer 1 of the pouch in a circumferential manner, and each outer pocket 2 of the pouch is arranged vertically.

[0085] Each air column mounting cavity 3 is rectangular in shape.

[0086] In this embodiment, the front facade 10101 and the rear facade 10102 are each sewn with three outer pockets 2; the left side facade 10103 and the right side facade 10104 are each sewn with one outer pocket 2.

[0087] Figure 5(a) is a three-dimensional structural diagram of the bag, which is made by sewing together carbon black modified fabric with 1200D reinforcing ribs prepared under the conditions of Example 3; Figure 5(b) is a front view structural diagram of the bag; Figure 5(c) is a left view structural diagram of the bag; Figure 5(d) is a top view structural diagram of the bag.

[0088] The inner layer 1 of the capsule is a cuboid with dimensions of 3.0m × 1.0m × 3.0m (length × width × height), and a pre-reserved filling port 102 at the top for filling with slurry or paste. Eight outer capsule pockets 2 are intermittently sewn to the outer surface of the inner layer 1 along the circumference. The top or bottom of the air column mounting cavity 3 inside the outer capsule pocket 2 is open. The air column mounting cavity 3 contains a polyvinyl chloride (PVC) inflatable air column with dimensions of 0.9m × 0.1m × 3.0m (length × width × height).

[0089] Taking the inflation of the polyvinyl chloride (PVC) air column by a 16L compression pump as an example, the inflation of the built-in PVC air column can be completed within 2 minutes. The bag can be inflated and stand upright without external mechanical assistance or anchor bolt fixation. Compared with the existing technology, it can achieve rapid deployment and self-support of the bag.

Claims

1. A method for preparing a multifunctional coal mine filling and sealing bag for rapid deployment, characterized in that, The preparation method includes the following steps: Step 1: Using high-strength flame-retardant polypropylene filaments and / or carbon black modified polypropylene conductive filaments as warp and weft yarns, weave a multifunctional woven fabric with good mechanical properties, flame retardant properties, antistatic properties and water-repellent properties. Step 2: The multifunctional woven fabric obtained in Step 1 is sewn and processed into a multifunctional filling and sealing bag with two layers. The inner layer (1) of the bag is used to fill the slurry, and the outer pocket (2) of the bag has a polyvinyl chloride inflatable column inside. The bag is quickly deployed by relying on the support of the polyvinyl chloride inflatable column when it is inflated.

2. The method for preparing the multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 1, characterized in that, In step one, the high-strength flame-retardant polypropylene filament is 400D and / or 1200D; the carbon black modified polypropylene conductive filament is 400D.

3. The method for preparing the multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 1, characterized in that, In step one, when the specification of the high-strength flame-retardant polypropylene filament is 400D, the warp density of the multifunctional woven fabric is 95-105 threads / 10cm, and the weft density of the multifunctional woven fabric is 65-85 threads / 10cm.

4. The method for preparing the multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 1, characterized in that, In step one, when the specification of the high-strength flame-retardant polypropylene filament is 1200D, the warp density and weft density of the multifunctional woven fabric are both 2 to 7 threads / 10cm.

5. The method for preparing the multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 1, characterized in that, In step one, when the specification of the carbon black modified polypropylene conductive filament is 400D, the warp density and weft density of the multifunctional woven fabric are both 1 to 5 threads / 10cm.

6. The method for preparing the multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 1, characterized in that, In step one, the fabric coverage coefficient of the multifunctional woven fabric is 85-88%; the width of the multifunctional woven fabric is 1.5m; and the unit area mass of the multifunctional woven fabric is 350-380g / m². 2 .

7. The method for preparing the multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 1, characterized in that, In step two, the stitch density during the stitching process is 10-15 stitches / 10cm.

8. A multifunctional coal mine filling and sealing bag for rapid deployment, characterized in that, The bag includes an inner bag layer (1) and multiple outer bag pockets (2), the multiple outer bag pockets (2) being sewn onto the circumferential outer surface of the inner bag layer (1); The inner layer (1) of the bag includes a closed inner layer body (101) sewn together. The inner layer body (101) is provided with a cavity for containing filling slurry. The inner layer body (101) is also provided with an injection port (102), which is connected to the cavity inside the inner layer body (101). The cavity formed by the inner surface of the outer pocket (2) of each bag and the outer surface of the inner layer (1) of the bag is an air column mounting cavity (3). The top or bottom of the air column mounting cavity (3) is open, and a polyvinyl chloride inflatable air column can be installed in the air column mounting cavity (3).

9. The multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 8, characterized in that, The inner body (101) of the bag is a cuboid structure formed by connecting and sewing together the front face (10101), the rear face (10102), the left side face (10103), the right side face (10104), the top face (10105), and the bottom face (10106). The top surface (10105) is provided with an injection port (102), which is connected to the internal cavity of the inner layer body (101) of the bag.

10. The multifunctional coal mine filling and sealing bag for rapid deployment as described in claim 9, characterized in that, Multiple outer pockets (2) of the bag are uniformly and intermittently arranged along the outer surface of the inner layer (1) of the bag, and each outer pocket (2) of the bag is arranged vertically. Each of the aforementioned air column mounting cavities (3) is rectangular in shape.

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