Anti-bottom drum flexible film bag device and use method thereof

Abstract

The present invention discloses an anti-bottom drum soft film bag device, comprising an anti-bottom drum soft film bag, one end of the anti-bottom drum soft film bag is fixed on the coal rock wall behind the working face, the other end of the anti-bottom drum soft film bag is connected to a hydraulic support, and the hydraulic support points to the working face; the anti-bottom drum soft film bag is located at one end of the coal rock wall and is provided with a grouting hole, and one side of the anti-bottom drum soft film bag is also provided with an exhaust hole; the present invention also discloses a method for using the anti-bottom drum soft film bag device, wherein a plurality of hydraulic supports are used to push the corresponding anti-bottom drum soft film bags to form a transverse soft film wall, and the waste generated during the mining process is timely filled and supported in the tunnel behind the support, thereby solving the problem of difficult treatment of waste during the mining process, and solving the problem of bottom drum protrusion occurring with the increase of mining depth, thereby supplementing the integrity of the rock mass, enhancing the stability of the tunnel, and improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of mining engineering and relates to an anti-bottom drum soft film bag device.

[0002] The invention also relates to a method for using the anti-bottom drum flexible film bag device. Background Art

[0003] In the past two or three decades, as the depth of underground mining continues to increase, the problem of floor drum in chambers (tunnels) has become increasingly prominent, especially in coal mines. At present, in deep tunnels of coal mines, due to the concentration of high ground stress, the floor plate undergoes damage in the form of splitting, buckling, shearing, etc. Floor drum has become a common problem in my country's coal mines. Floor drum is not only the main form of tunnel damage, but also a difficult problem in tunnel stability control. Up to now, there are many methods for preventing and controlling floor drum, but they are nothing more than reinforcement method or pressure relief method. Engineering practice shows that in addition to the self-weight stress, rock chambers often also bear residual structural stress. Therefore, the prevention and control of floor drum should start from two aspects: reducing the strong horizontal force on the floor plate (external cause) and improving the strength and integrity of the floor plate (internal cause). Due to the unclear understanding of the external causes of this problem, the existing floor drum prevention and control technology focuses more on only one of them. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-bottom drum flexible film bag device, which solves the problem of tunnel floor drum protrusion caused by high stress concentration in deep tunnels of coal mines.

[0005] Another object of the present invention is to provide a method for using the anti-bottom drum flexible film bag device.

[0006] The first technical solution of the present invention is a anti-bottom drum soft film bag device, comprising an anti-bottom drum soft film bag, one end of the anti-bottom drum soft film bag is fixed on the coal rock wall behind the working face, the other end of the anti-bottom drum soft film bag is connected to a hydraulic support, and the hydraulic support points to the working face; a grouting hole is provided at one end of the anti-bottom drum soft film bag located on the coal rock wall, and an exhaust hole is also provided on one side of the anti-bottom drum soft film bag.

[0007] The first technical solution of the present invention is also characterized in that:

[0008] A plurality of hydraulic supports are arranged side by side, and each hydraulic support is connected to an anti-bottom drum soft film bag, wherein the exhaust holes are respectively arranged at the top of both ends of the anti-bottom drum soft film bag and are symmetrically arranged;

[0009] The two ends of the anti-bottom drum soft film bag are also provided with hanging parts respectively;

[0010] The second technical solution of the present invention is a method for using an anti-bottom drum flexible film bag device, which adopts the above-mentioned anti-bottom drum flexible film bag device and is specifically implemented in the following steps:

[0011] Step 1, fix one end of the anti-bottom drum soft film bag on the coal rock wall behind the working face;

[0012] Step 2, hang the other end of the folded anti-bottom drum flexible film bag on the hydraulic support;

[0013] Step 3: Several hydraulic supports in the middle of the working surface are pushed forward by 0.8m each time, and then the anti-bottom drum soft film bags are deployed one by one for grouting;

[0014] Step 4, after the hydraulic support in the middle of the working surface is pushed forward a certain distance, the hydraulic supports on both sides of the working surface also unfold the flexible film bags to form a horizontal flexible film wall, and then only the flexible film bag in the middle is unfolded again, and the process is repeated;

[0015] Step 5. After the suspended soft film bags are used up, they are replaced again until the working face is advanced. The horizontal soft film wall plays a reinforcing role to prevent the tilt of the coal pillar from causing the bottom bulge of the tunnel.

[0016] The beneficial effects of the present invention are:

[0017] The purpose of the present invention is to provide an anti-bottom drum soft film bag device, which can use waste to fill the soft film bag during mining, thereby increasing the support strength of the tunnel and forming a coupling of coal and rock mass, especially in soft rock tunnels and deep tunnels, which can improve the strength of the surrounding rock, prevent bottom drum protrusion and roof collapse, and cause casualties. At the same time, due to the adaptability of the soft film bag, it can autonomously adapt to the slight deformation of the tunnel within a certain range, thereby allowing the tunnel to deform slightly while providing good support. It can be reinforced at any time according to the deformation of the tunnel. After the transformation, it has good temporal and spatial properties, which is consistent with the deformation law of the tunnel. The waste generated during the mining process is timely filled and supported in the tunnel behind the support, which solves the problem of difficult handling of waste during the mining process, and solves the problem of bottom drum protrusion that occurs with the increase of mining depth, supplements the integrity of the rock mass, enhances the stability of the tunnel, and improves production efficiency BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an anti-bottom drum flexible film bag device of the present invention.

[0019] In the figure, 1. Anti-bottom drum soft membrane bag, 2. Exhaust hole, 3. Grouting hole, 4. Hydraulic support, 5. Horizontal soft membrane wall. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The present invention provides an anti-bottom drum flexible film bag device, such as Figure 1As shown, one end of the anti-bottom drum soft film bag 1 is first fixed on the coal (rock) wall behind the working face, and the other end of the anti-bottom drum soft film bag 1 is fixed to the hydraulic support 4. The hydraulic support 4 is pushed forward. A plurality of hydraulic supports 4 are arranged side by side, and each hydraulic support 4 has an anti-bottom drum soft film bag 1, and each hydraulic support 4 is connected with at least one anti-bottom drum soft film bag 1. The anti-bottom drum soft film bags 1 fixed on the hydraulic support 4 are opened in sequence. A grouting hole 3 is opened at one end of the anti-bottom drum soft film bag 1 located on the coal (rock) wall, and concrete is grouted into the soft film belt through the grouting hole 3. An exhaust hole 2 is opened on one side of the anti-bottom drum soft film bag 1, and exhaust is exhausted through the exhaust hole 2. After several hydraulic supports 4 are pushed forward a certain distance, the surrounding hydraulic supports 4 also open the anti-bottom drum soft film bags at the same time, so that a series of horizontal soft film walls 5 are formed, which play a role in reinforcing the anti-bottom drum. The suspended anti-bottom drum soft film bags are replaced after use, and then the process is repeated until the next working face is pushed forward to prevent the inclination of the coal pillar from causing the bottom drum of the tunnel. At the same time, it also supplements the integrity of the rock mass, enhances the stability of the tunnel and improves the production efficiency; a fixing belt is also provided on the anti-bottom drum soft film bag 1, and the anti-bottom drum soft film bag 1 is connected to the hydraulic support 4 through the fixing belt, and a fixing screw is also provided on one side of the fixing belt; suspension parts are also provided at both ends of the anti-bottom drum soft film bag 1.

[0022] The anti-bottom-drum soft film bag 1 is composed of an elastic film and highly elastic fibers; the elastic film is used as a base material, which is processed from rubber and has a membrane structure with a certain thickness and elasticity; the highly elastic fibers are used as a reinforcing material, which is composed of transverse fibers and longitudinal fibers arranged crosswise to form a mesh structure and are embedded in the elastic film; the highly elastic fibers can deform within a certain range with the elastic film, and can adapt to the deformation of the elastic film within a certain range while providing good support for the elastic film; a fastening component is installed on the outside of the soft film bag, which can facilitate users to fasten different positions on the fastening belt through the fastening component, thereby increasing the overall thickness of the soft film bag. The stability of the body is prevented from excessive deformation and cracking; a filling port is provided on the upper right side of the flexible film bag for injecting filling materials, and a vent is provided on the upper left side for timely exhausting the air in the bag to avoid the formation of high pressure in the bag causing difficulty in filling; the filling port is composed of a sealing ring and a bolt, and there is a thread inside the filling port to facilitate the connection of the filling pipe and the installation of the bolt to seal the flexible film bag after the filling is completed to prevent the filling material from leaking, and the sealing ring can withstand a maximum pressure of 10Mpa; the outer diameter of the bolt is equal to the inner diameter of the filling port; the vent is located in the upper left side of the flexible film bag, and is composed of a sealing ring and a leak-proof net, which prevents the filling material from leaking while ensuring the smooth discharge of the gas in the bag.

[0023] The present invention also discloses a method for using an anti-bottom drum flexible film bag device, which adopts the anti-bottom drum flexible film bag device according to claim 1 and is specifically implemented according to the following steps:

[0024] Step 1, according to a design scheme of an anti-bottom drum soft film bag device, fix it on the coal rock wall behind the hydraulic support 4;

[0025] Step 2, after step 1, hang the folded anti-bottom drum soft film bag 1 on the hydraulic support 4, the anti-bottom drum soft film bag 1 is provided with a grouting hole 3, the grouting hole is used to connect the grouting pipe so that the grouting material enters the soft film bag; the exhaust hole 2 is used to allow the gas in the bag to be discharged smoothly through the exhaust hole during the grouting process to ensure that the grouting can be injected into the soft film bag, the exhaust holes are located at the upper part of both ends of the soft film bag and are symmetrically distributed; the fixing belt enables the soft film bag to be fixed on the hydraulic support and the coal wall, and is used in conjunction with the hanging parts and fixing screws, which are distributed on the bag body of the soft film bag; the hanging parts enable the soft film bag to be hung on the coal wall and the hydraulic support, and are arranged at the top opening of the soft film bag for easy hanging; the fixing screws enable the fixing belt, the hanging part, etc. to be better fixed on the coal wall and the hydraulic support, and can be arranged near the fixing belt;

[0026] Step 3, the several hydraulic supports in the middle of the working surface are pushed forward with the length, such as 0.8m each time, and then the anti-bottom drum soft film bags 1 are deployed one by one for grouting; first, each hydraulic support that needs to hang soft film bags has more than one soft film bag, which is determined by the pushing length. If the number of hangings is limited at the beginning, then all of them are deployed and replaced with new ones. Secondly, according to the length of the working surface, the specific number of hydraulic supports in the middle that need to hang soft film bags is set, and then each time the hydraulic supports that have hung soft film bags are selected for deployment, the rest do not need to be deployed, and then after each advancement for a certain distance, one or two soft film bags on the remaining hydraulic supports are deployed, and the advancement continues to only deploy the several hydraulic supports in the middle that have hung soft film bags, and then the advancement continues to deploy the remaining one or two again for a certain distance, and this is repeated;

[0027] Step 4: After the middle hydraulic support is pushed forward for a certain distance, generally one horizontal flexible film bag is placed every 4m, the supports on both sides also unfold the flexible film bags to form a horizontal flexible film wall, and then only the middle flexible film bag is unfolded again, and the process is repeated;

[0028] Step 5. After the suspended soft film bags are used up, they are replaced again until the working face is advanced. The horizontal soft film wall plays a reinforcing role to prevent the tilt of the coal pillar from causing the bottom bulge of the tunnel.

Claims

1. A method for using an anti-bottom drum flexible film bag device, characterized in that: An anti-bottom drum soft film bag device is used, the device comprises an anti-bottom drum soft film bag (1), one end of the anti-bottom drum soft film bag (1) is fixed on the coal rock wall behind the working face, and the other end of the anti-bottom drum soft film bag (1) is connected to a hydraulic support (4), and the hydraulic support (4) points to the working face; the anti-bottom drum soft film bag (1) is provided with a grouting hole (3) at one end of the coal rock wall, and an exhaust hole (2) is also provided on one side of the anti-bottom drum soft film bag (1); a plurality of hydraulic supports (4) are arranged side by side, and each hydraulic support (4) has an anti-bottom drum soft film bag (1); the exhaust holes (2) are respectively arranged at the top of both ends of the anti-bottom drum soft film bag (1), and are symmetrically arranged; and the two ends of the anti-bottom drum soft film bag (1) are also respectively provided with hanging parts; The method of use is implemented in the following steps: Step 1, fixing one end of the anti-bottom drum soft film bag (1) on the coal rock wall behind the working face; Step 2, hanging the other end of the folded anti-bottom drum flexible film bag (1) on the hydraulic support; Step 3: Several hydraulic supports in the middle of the working surface are pushed forward by 0.8 m each time, and then the anti-bottom drum soft film bags (1) are deployed in sequence for grouting; Step 4, after the hydraulic support in the middle of the working surface is pushed forward a certain distance, the hydraulic supports on both sides of the working surface also unfold the flexible film bags to form a horizontal flexible film wall, and then only the flexible film bag in the middle is unfolded again, and the process is repeated; Step 5. After the suspended soft film bags are used up, they are replaced again until the working face is advanced. The horizontal soft film wall plays a reinforcing role to prevent the tilt of the coal pillar from causing the bottom bulge of the tunnel.

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