CN103557008A - Thin-walled metal structure and tunnel anchoring surrounding rock coupled anti-scour supporting structure - Google Patents

Abstract

An anti-scour support structure for the coupling effect of a thin-walled metal structure and roadway anchorage surrounding rock, which is characterized in that it is composed of an anchor mesh support body (3), a rigid support body (1) and a thin-walled metal member (2) , the bolts of the anchor mesh support body (3) are inserted into the surrounding rock (4) to form a shell bearing structure equivalent to reinforced concrete, and the thin-walled metal components (2) are located in the anchor mesh support body ( 3) It is fixedly connected with the rigid support body (1) and with the rigid support body (1). The invention can make the surrounding rock effectively absorb the dynamic energy of the deformation and movement of the anchorage area during the process of deformation and overall movement of the surrounding rock in the free space of the roadway, so that the anchorage surrounding rock can be stabilized as soon as possible, effectively supporting the surrounding rock inside the roadway, and avoiding the surrounding rock of the roadway. The further damage and instability of the rock will reduce the damage intensity of the rock burst.

Description

Anti-erosion support structure with coupling effect of thin-walled metal structure and roadway anchorage surrounding rock

technical field

   The invention relates to a mine support technology, in particular to a mine roadway scour prevention technology, in particular to a scour prevention support structure in which a thin-walled metal structure is coupled with roadway anchorage surrounding rock.

Background technique

At present, as the mining of mines in our country enters the deep part, the impact of rock pressure disasters is becoming more and more serious. The number of mines with strong dynamic disasters has reached more than 100, and frequent accidents of roadway casualties due to dynamic damage have seriously restricted the safety and efficiency of coal resources. mining. The support problem of the impact-inclined roadway is one of the main contents of the rockburst research, and it is an important subject related to the safe and efficient mining of deep coal resources.

The anchor-mesh support structure is a support method in which the anchor-mesh components and the surrounding rock form an organic joint bearing structure. This is a support method commonly used on site. The anchor-mesh support has good adaptability to the impact-inclined roadway. Especially for the dynamic occurrence of small earthquakes, anchor-net support structures are generally not damaged, but for large-magnitude dynamic phenomena, there are many cases of serious damage and failure of anchor-net support structures.

Contents of the invention

The purpose of the present invention is to design a thin-walled metal structure that can effectively resist large-capacity impacts and reduce safety accidents caused by impact rock pressure to couple with roadway anchorage surrounding rocks in view of the problem that the existing anchor net support technology is difficult to withstand large-scale damage Functional anti-scour support structure.

Technical scheme of the present invention is:

An anti-scour support structure with a thin-walled metal structure coupled with roadway anchorage surrounding rock is characterized in that it is composed of an anchor net support body 3, a rigid support body 1 and a thin-wall metal member 2, and the anchor net The anchor rod of the support body 3 is inserted into the surrounding rock 4 to form a shell bearing structure equivalent to reinforced concrete. The thin-walled metal member 2 is located between the anchor mesh support body 3 and the rigid support body 1 and is connected to the rigid The protection body 1 is fixedly connected to restrain the deformation and movement of the anchorage area in time, suppress the large release of accumulated energy of the internal rock when the impact occurs, and protect the anchor mesh support body 3 and the rigid support body 1 to prevent them from being impacted destroy.

The thin-walled metal member 2 is a thin-walled metal structure with unit cells or multiple cells of different cross-sectional shapes, different thicknesses, different sizes, and different materials selected according to the design requirements of anti-shock capacity and strength. It consists of upper and lower steel panels 5 It is composed of welding with the interlayer 6, and the interlayer 6 is an annular thin-walled pipe or a thin-walled honeycomb structure.

The steel panels between the thin-walled metal components 2 are connected into a whole by welding.

Between the rigid support body 1, the rigid support body 1 and the thin-walled metal member 2 are fixedly connected together to form an integral structure without displacement between each other, and the rigid support body 1. The central position of the steel panel 5 aligned with the thin-walled metal member 2 is welded and connected to fully exert the deformation resistance and bearing capacity of the steel panel.

Beneficial effects of the present invention:

1. The present invention organically combines the "flexible function" of the anchor mesh support with the energy-absorbing function of the thin-walled metal structure. The "flexible function" can maintain the anchorage of the surrounding rock within a certain range of deformation and overall movement of the surrounding rock. This provides the premise and favorable conditions for the thin-walled metal structure to effectively absorb the dynamic energy on the anchorage area during the deformation and overall movement of the surrounding rock to the free space of the roadway; and the thin-walled metal structure restrains the anchorage area in time. The deformation and movement of the anchorage area can stabilize the anchorage area as soon as possible, effectively supporting the internal surrounding rock, inhibiting the release of a large amount of energy accumulated in the internal rock mass, and effectively protecting the anchorage area and supporting components from more severe damage. impact damage, so that the effective attenuation of impact energy by the anchorage of the anchor net and the thin-walled metal structure can be organically combined. It is of great significance to ensure the safe and efficient mining of coal mines.

2. The thin-walled metal component of the present invention has the advantages of low cost, low energy consumption, easy processing and easy and safe use at the coal mine site.

3. The annular thin-walled pipe or thin-walled honeycomb thin-walled metal member of the present invention has the advantages of light weight, high pressure bearing capacity, and convenient installation. At the same time, the large contact surface of the steel panel is used to mechanically connect with the rigid support body. It can give full play to the energy-absorbing and anti-shock ability produced by the combination of rigid support body and thin-walled metal components.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the principle structure of the present invention.

Fig. 3 is one of the structural schematic diagrams of the thin-walled metal member of the present invention.

Fig. 4 is the second structural schematic view of the thin-walled metal member of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1-4.

A kind of anti-scour support structure with thin-walled metal structure coupled with roadway anchoring surrounding rock, which is composed of anchor mesh support body 3, rigid support body 1 and thin-wall metal member 2, as shown in Figure 1, the described The bolts of the anchor mesh support body 3 are inserted into the surrounding rock 4 to form a shell bearing structure equivalent to reinforced concrete, and the thin-walled metal member 2 is located between the anchor mesh support body 3 and the rigid support body 1 and It is fixedly connected with the rigid support body 1 to timely suppress the deformation and movement of the anchorage area, suppress the large amount of energy accumulated in the internal rock during impact, and protect the anchor mesh support body 3 and the rigid support body 1 from being damaged. impact damage. The thin-walled metal member 2 is a thin-walled metal structure with unit cells or multiple cells of different cross-sectional shapes, different thicknesses, different sizes, and different materials selected according to the design requirements of anti-shock ability and strength, and steel panels 5 are welded up and down. , Standard size parts processed. Various forms such as annular thin-walled pipe fittings (Fig. 3) or thin-walled honeycomb structures (Fig. 4) are fixed between the steel panels 5, and the annular thin-walled pipe fittings or thin-walled honeycomb structures can be single-layer or multi-layer structures, as shown in Fig. 3 It is a multi-layer annular thin-walled pipe fitting, and Figure 4 shows a single-layer thin-walled honeycomb structure (it can also be a multi-layer honeycomb structure). The steel panels between the thin-walled metal components 2 are fixed together through mechanical connection. Between the rigid support body 1, the rigid support body 1 and the thin-walled metal member 2 are fixed together to form an integral structure without displacement between each other. The rigid support body 1 and the thin-walled metal member 2 When the metal member 2 is connected, the connection part is preferably mechanically connected to the center of the steel panel, and the connection seam of the thin-walled metal member 2 should be avoided as far as possible, so that the connection is not only convenient, but also the rigid support body and the thin-walled The energy absorption and anti-shock ability produced by the combination of metal components. It should be noted that all parts connected underground must be mechanically connected, and welding operations cannot be performed.

The principle of the present invention is shown in Figure 2. It uses the strengthening effect of the anchor net support to combine the surrounding rock within the anchorage range into a whole, so that the surrounding rock around the roadway forms a shell bearing structure equivalent to reinforced concrete. This shell structure can maintain the inherent strength of the surrounding rock around the roadway and enhance the stability under impact loads. More importantly, by setting a thin-walled metal structure between the rigid support and the anchored surrounding rock, the dynamic energy of the deformation and movement of the anchorage area can be effectively absorbed during the deformation and overall movement of the surrounding rock to the free space of the roadway, so that the anchored surrounding rock can be anchored as quickly as possible. When stabilized, it can effectively support the surrounding rock inside the roadway, prevent the crushing zone and plastic zone from expanding and multiplying to the internal surrounding rock, avoid further damage and instability of the surrounding rock in the roadway, and reduce the damage intensity of rock burst.

Construction method of the present invention is:

Step 1: Using anchor net support in the roadway, the surrounding rock 4 within the anchorage range is combined into an integral anchor multi-support body 3, so that the surrounding rock around the roadway forms a shell bearing structure equivalent to reinforced concrete.

Step 2: use the rigid support 1 to support the roadway, and arrange the thin-walled metal structure 2 between the rigid support 1 and the anchored surrounding rock 4 .

Step 3: Fasten connection between the thin-walled metal components 2 , and fasten connection between the rigid supports 1 and between the rigid support 1 and the thin-walled metal components 2 .

The parts not involved in the present invention are the same as the prior art or can be realized by adopting the prior art.

Claims (4)

1. the erosion control supporting and protection structure of a thin-wall metal structure and the coupling of tunnel anchoring country rock, it is characterized in that it is by bolting with wire mesh body (3), rigid protection body (1) and thin-wall metal member (2) form, the anchor pole of described bolting with wire mesh body (3) inserts the middle housing bearing structure that is equivalent to steel concrete that forms of country rock (4), described thin-wall metal member (2) is positioned between bolting with wire mesh body (3) and rigid protection body (1) and is fixedly connected with to suppress in time distortion and the movement of anchorage zone with rigid protection body (1), suppress to impact a large amount of release that while occurring, inner rock mass gathers strength and play the protection to bolting with wire mesh body (3) and rigid protection body (1), prevent its destruction that is hit.

2. the erosion control supporting and protection structure of thin-wall metal structure according to claim 1 and the coupling of tunnel anchoring country rock, it is characterized in that described thin-wall metal member (2) is for unit born of the same parents or polynary born of the same parents' thin-wall metal structure, it is welded to form by upper and lower steel facing (5) and interlayer (6), and described interlayer (6) is annular thin wall pipe or cellular structure.

3. the erosion control supporting and protection structure of thin-wall metal structure according to claim 2 and the coupling of tunnel anchoring country rock, is characterized in that on steel facing (5), carrying out mechanical connection between described thin-wall metal member (2), is linked to be an integral body.

4. the erosion control supporting and protection structure of thin-wall metal structure according to claim 1 and the coupling of tunnel anchoring country rock, it is characterized in that between described rigid protection body (1), between rigid protection body (1) and thin-wall metal member (2), by mechanical connection, connect together, form an overall structure, can not produce displacement each other, and described rigid protection body (1) is connected with the center position machinery of the steel facing (5) of thin-wall metal member (2), to facilitate thin-wall metal member (2) mechanical connection, and give full play to the energy-absorbing shock-absorbing capacity that rigid protection body (1) and thin-wall metal member (2) compound action produce.

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