A construction method for reinforcing and filling a collapsed area of a chamber in a well

Abstract

The application relates to the technical field of reinforcement measures for mine chamber collapse areas, in particular to a construction method for reinforcing and filling a chamber collapse area underground, which comprises the following steps: step one, determining a treatment area; step two, setting a wall seat; step three, filling the collapse area; step four, excavating the collapse section; and step five, excavating the normal section. Compared with the prior art, the construction method for reinforcing and filling a chamber collapse area underground can supplement and reinforce the collapse area and the normal section, is beneficial to safely and smoothly passing through the collapse section. In addition, by additionally arranging the wall seat, filling the collapse area and reinforcing the formwork, the overall stability of the area is effectively improved, the area can be passed through in the shortest time in the limited space, and the event is prevented from further expanding.

Description

Technical Field

[0001] This invention relates to the technical field of reinforcement measures for collapsed areas in mine chambers, specifically a construction method for reinforcing and filling collapsed areas in underground chambers. Background Technology

[0002] When mining projects encounter surrounding rock of grade IV or above or structural fault fracture zones, phenomena such as rock spalling, collapse, and deformation are very likely to occur. Especially during the construction of chambers, due to limited space, conventional support methods cannot fully guarantee smooth passage through the collapse zone, and repeated support is likely to occur, resulting in high safety risks.

[0003] In view of this, the present invention is hereby proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for reinforcing and filling the collapsed area of ​​an underground chamber, which can supplement and reinforce the collapsed area and the normal section, and facilitate the safe and smooth passage through the collapsed section.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A construction method for reinforcing and filling collapsed areas in underground chambers includes the following steps:

[0007] Step 1: Determine the processing area;

[0008] A treatment area of ​​more than 25m was demarcated above the collapse zone in the underground chamber;

[0009] Step 2: Install the wall mount;

[0010] A wall base is installed in the treatment area above the stepping zone, and reinforced concrete wall base support is poured at the same time.

[0011] Step 3: Filling the collapsed area;

[0012] Concrete was filled into the collapsed area, and threaded steel bars were installed during the pouring process.

[0013] Step 4: Excavation of the collapsed section;

[0014] The collapsed section was constructed using short excavation and short temporary support, with the support method being channel steel arch ring anchor mesh spraying;

[0015] Step 5: Excavation of the normal section;

[0016] The normal section excavation also adopts short excavation and short temporary support construction, with the support form being channel steel arch ring anchor mesh spraying, until the bottom is excavated.

[0017] Preferably, the method further includes the following steps:

[0018] Step Six: Safety Precautions;

[0019] Four anchoring holes are drilled evenly at the wellhead. Round steel anchor rods are installed in the anchoring holes and penetrate deep into the rock mass. The anchor rods are made of round steel. One end of the wire rope is fixed to the ring of the anchor rod and secured with three rope clips. The other end of the wire rope is bent into a ring and secured with three rope clips.

[0020] Preferably, in step two, when setting the wall seat:

[0021] The wall bases are 1.8m-2.0m high and are arranged symmetrically.

[0022] Preferably, in the third step of filling the collapsed area:

[0023] The concrete grade is C25, and the rebar is 2.5m to 5m long.

[0024] Preferably, in the fourth step of excavating the collapsed section:

[0025] During the excavation process, the excavation dimensions were increased by 200mm compared to the diameter of the excavation section.

[0026] Preferably, in the fourth step of excavating the collapsed section:

[0027] The channel steel is [12, with a spacing of 1m. The channel steel arches are connected by Φ32 round steel with a spacing of 1.5m. The channel steel arches are fixed to the well wall using Φ20 resin anchor rods with a length of 1.5m and a spacing of 1.5m.

[0028] Preferably, in the normal section excavation of step five:

[0029] The channel steel is [12, with a spacing of 1m. The channel steel arches are connected by Φ32 round steel with a spacing of 1.5m. The channel steel arches are fixed to the well wall using Φ20 resin anchor rods with a length of 1.5m and a spacing of 1.5m.

[0030] Preferably, in the sixth step of the safety protection:

[0031] The anchoring hole has a diameter of 40mm and a depth of 1m. The anchor rod extends 1m into the rock mass and is made of Φ32mm round steel.

[0032] Preferably, in the sixth step of the safety protection:

[0033] One end of the anchor rod is cold-bent and reinforced into a ring shape with the ring closed, while the other end of the anchor rod is processed into an expansion wedge shape.

[0034] Compared with existing technologies, the present invention provides a construction method for reinforcing and filling collapsed areas in underground chambers. This method can supplement and reinforce both the collapsed area and the normal section, facilitating safe and smooth passage through the collapsed section. Furthermore, by adding wall supports, filling the collapsed area, and reinforcing templates, the overall stability of this area is effectively increased, allowing passage through the area in the shortest possible time within a limited space, thus preventing further escalation of the incident.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram illustrating the overall layout of the underground chamber collapse zone and collapse section in a construction method for reinforcing and filling the collapsed area of ​​an underground chamber, as provided in an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram of the wall support setup in a construction method for reinforcing and filling the collapsed area of ​​an underground chamber, as provided in an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the filling construction of the collapsed section in a construction method for reinforcing and filling the collapsed area of ​​an underground chamber provided in an embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of the support for the collapsed section in a construction method for reinforcing and filling the collapsed area of ​​an underground chamber, provided in an embodiment of the present invention.

[0041] The diagram is shown below:

[0042] 1. Reinforced steel fiber reinforced concrete; 2. Wall base; 3. Uncrowded area; 4. Dust chute; 5. Concrete; 6. Resin anchor; 7. Round steel; 8. Channel steel; 9. Anchor. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] This invention provides a construction method for reinforcing and filling collapsed areas in underground chambers, comprising the following steps:

[0045] Step 1: Determine the processing area;

[0046] like Figure 1 As shown, based on actual measurements and surrounding rock predictions during construction, a treatment area of ​​more than 25m was delineated above the void zone 3 in the underground chamber.

[0047] Step 2: Install the wall mount;

[0048] like Figure 2 As shown, a wall base is set up in the treatment area above the stepping zone 3, and reinforced steel fiber concrete 1 is poured for wall base support.

[0049] In this step, the reinforced steel fiber reinforced concrete wall support 1 is located 20-25m above the collapsed area of ​​the underground chamber. This support is fixed by symmetrically arranged wall supports 2, which are 1.8m-2.0m high.

[0050] In this step, the use of this section of reinforced steel fiber concrete support is beneficial for the partition above and facilitates the construction of the next process.

[0051] Step 3: Filling the collapsed area;

[0052] Concrete 5 is filled into the collapsed area and poured through chute 4. Threaded steel bars are installed during the pouring process.

[0053] like Figure 3 As shown, in this step, the collapsed area is filled with concrete of the same grade 5, and irregular 20 threaded steel bars with a length of 2.5m to 5m are installed during the pouring.

[0054] Step 4: Excavation of the collapsed section;

[0055] The collapsed section was constructed using short excavation and short temporary support, with the support method being channel steel arch ring anchor mesh spraying;

[0056] like Figure 4 As shown, in this step, the collapsed section adopts short excavation and short temporary support construction. The excavation specification is 200mm wider than the designed excavation section diameter. The support form is channel steel 8 arch ring anchor mesh spray. The channel steel 8 specification is [12, with a spacing of 1m. The channel steel 8 arch rings are connected by Φ32 round steel 7 with a spacing of 1.5m. Φ20 resin anchor rods 6 are used to fix it to the well wall. The anchor rod length is 1.5m and the spacing is 1.5m.

[0057] Step 5: Excavation of the normal section;

[0058] The normal section excavation also adopts short excavation and short temporary support construction, with the support form being channel steel arch ring anchor mesh spraying, until the bottom is excavated.

[0059] In this step, during normal excavation, the temporary support measures are the same as in step four. The support form is channel steel 8 arch ring anchor mesh spraying. The channel steel 8 has a specification of [12, with a spacing of 1m. The channel steel 8 arch rings are connected with Φ32 round steel 7 with a spacing of 1.5m. Φ20 resin anchor rods 6 are used to fix it to the well wall. The anchor rods are 1.5m long and spaced at 1.5m.

[0060] In a preferred embodiment of the present invention, the construction method for reinforcing and filling the collapsed area of ​​an underground chamber provided in this embodiment further includes step six: safety protection.

[0061] The specific safety protection method is as follows: Drill four anchoring holes evenly at the wellhead, install round steel anchor rods in the anchoring holes, and make the anchor rods deep into the rock mass; fix one end of the wire rope protection rope to the ring of the anchor rod and secure it with three rope clamps, and bend the other end of the wire rope protection rope into a ring and secure it with three rope clamps.

[0062] In the above embodiment, the anchoring hole has a diameter of 40mm and a depth of 1m. The anchor rod 9 penetrates 1m into the rock mass and is made of Φ32mm round steel. One end of the anchor rod 9 is cold-bent and reinforced into a ring shape with a closed ring opening, and the other end of the anchor rod 9 is machined into an expansion wedge shape.

[0063] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0064] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0065] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A construction method for reinforcing and filling collapsed areas in underground chambers, characterized in that, Includes the following steps: Step 1: Determine the processing area; A treatment area of ​​more than 25m was demarcated above the collapse zone in the underground chamber; Step 2: Install the wall mount; A wall base is installed in the treatment area above the stepping zone, and reinforced concrete wall base support is poured at the same time. Step 3: Filling the collapsed area; Concrete was filled into the collapsed area, and threaded steel bars were installed during the pouring process. Step 4: Excavation of the collapsed section; The collapsed section was constructed using short excavation and short temporary support, with the support method being channel steel arch ring anchor mesh spraying. During the excavation of the collapsed section, the excavation specification was 200mm wider than the diameter of the excavation section. The channel steel specification was 12mm, with a spacing of 1m. The channel steel arch rings were connected with Φ32 round steel at a spacing of 1.5m. The channel steel arch rings were fixed to the well wall using Φ20 resin anchor rods, with an anchor rod length of 1.5m and a spacing of 1.5m. Step 5: Excavation of the normal section; The normal section excavation also adopts short excavation and short temporary support construction, with the support form being channel steel arch ring anchor mesh spraying, until the bottom is excavated; Step Six: Safety Precautions; Four anchoring holes are drilled evenly at the wellhead. Round steel anchor rods are installed in the anchoring holes and penetrate deep into the rock mass. The anchor rods are made of round steel. One end of the wire rope is fixed to the ring of the anchor rod and secured with three rope clips. The other end of the wire rope is bent into a ring and secured with three rope clips.

2. The construction method for reinforcing and filling the collapsed area of ​​an underground chamber according to claim 1, characterized in that, In step two, setting the wall mount: The wall bases are 1.8m-2.0m high and are arranged symmetrically.

3. The construction method for reinforcing and filling the collapsed area of ​​an underground chamber according to claim 2, characterized in that, In the third step of filling the collapsed area: The concrete grade is C25, and the rebar is 2.5m to 5m long.

4. The construction method for reinforcing and filling the collapsed area of ​​an underground chamber according to claim 3, characterized in that, In the normal section excavation of step five: The channel steel is 12mm in size and spaced 1m apart. The channel steel arches are connected by Φ32 round steel bars spaced 1.5m apart. The channel steel arches are fixed to the well wall using Φ20 resin anchor rods, which are 1.5m long and spaced 1.5m apart.

5. The construction method for reinforcing and filling the collapsed area of ​​an underground chamber according to claim 4, characterized in that, In the sixth step of the safety protection: The anchoring hole has a diameter of 40mm and a depth of 1m. The anchor rod extends 1m into the rock mass and is made of Φ32mm round steel.

6. The construction method for reinforcing and filling the collapsed area of ​​an underground chamber according to claim 5, characterized in that, In the sixth step of the safety protection: One end of the anchor rod is cold-bent and reinforced into a ring shape with the ring closed, while the other end of the anchor rod is processed into an expansion wedge shape.

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