CN103321655B - Roadway floor reinforcement method with functions of horizontal yielding and energy absorption - Google Patents

Abstract

The invention relates to a roadway floor reinforcement method with functions of horizontal yielding and energy absorption, belongs to the technical field of coal mining and applies to bottom heave of a roadway caused by horizontal pressure from two roadway sides. The function of pressure relief is realized through horizontal deformation of yielding structures (ribbed bars), and the requirements for horizontal yielding and passage of vehicles are met. Compared with the method of laying concrete in the same thickness, the method has the advantages that concrete consumption is greatly reduced and the cost is saved. According to the method, building blocks are used for reinforcement. Each building block comprises a body which is rectangular, and a plurality of ribbed bars are disposed on one minimum-area side of the rectangular body. The method includes the steps of 1, leveling the roadway floor; 2, tiling the building blocks on the roadway floor, allowing the ribbed bars of the building blocks to be perpendicular to the roadway sides and the ribbed bars of the building blocks to be co-directional; cutting the building blocks adjacent to the roadway sides, and mutually pressing and attaching the adjacent building blocks while mutually pressing and attaching the building block bodies and the roadway sides.

Description

A kind of have level allow pressure energy-absorbing function roadway floor reinforcement means

Technical field

The invention belongs to Coal Mining Technology field, relate to and a kind ofly there is level allow the roadway floor reinforcement means of pressure energy-absorbing function, be applicable to tunnel and help the pucking that causes of lateral extrusion by tunnel, both sides.

Background technology

At present, along with mine construction trends towards maximizing and modernization, the technology and equipment that down-hole uses is also more advanced.At the good mine of geological conditions, down-hole assistant conveyance many employings railless free-wheeled vehicle complete on personnel go into the well, the work such as material delivery and equipment carrying, railless free-wheeled vehicle runs needs road surface as far as possible smooth, durable.Therefore roadway floor consolidation process is to ensureing that transport is unimpeded, personnel pass through, and then the safe and efficient production realizing mine is significant.At present, the roadway floor reinforcement means usually adopted pours into a mould certain thickness concrete at base plate, and by the maintenance of certain hour, shaping after come into operation.

The roadway floor reinforcement means of fluid concrete needs to implement in underground site, and concrete laying quality affects obviously by working environment.Top board trickle has lasting corrosiveness to not solidifying good concrete surface, easily causes concrete surface to occur honeycomb, rainprint etc., and the easy occurrence temperature type of concrete surface and geostatic stress type crack, these all affect its intensity.And concrete is when being subject to tunnel, both sides side lateral extrusion, pouring concrete base plate entirety is easily heaved and is even fractureed, and need carry out the end and overhaul, again pour into a mould, complex disposal process, cost are high and engineering quantity is large.

Summary of the invention

For prior art Problems existing, the invention provides a kind of have level allow pressure energy-absorbing function roadway floor reinforcement means, the method not only meets level allows pressure and the requirement of vehicle pass-through, and compared with laying the concrete of condition of equivalent thickness, greatly reduce concrete consumption, save cost.

To achieve these goals, the present invention adopts following technical scheme: a kind of have level allow pressure energy-absorbing function roadway floor reinforcement means, the method adopts building block to reinforce, described building block, comprise main body, described main body is cuboid, and the side that cuboid area is minimum is provided with several ribs, and the method comprises the steps:

Step one: smooth roadway floor;

Step 2: building block be laid on roadway floor, the rib of building block is helped perpendicular to tunnel, and the rib of building block is towards same direction; The building block of next-door neighbour tunnel side is cut, makes between adjacent block, block main body and tunnel, both sides between help mutual extrude sturdy.

Described building block adopts concrete for making.

Described rib cross section is trapezoidal.

Bottom described block main body, be provided with groove, described groove is spherical.

Beneficial effect of the present invention:

When roadway floor is by the lateral extrusion distortion of tunnel, both sides side, of the present invention have allow the rib of pressure energy-absorbing function fracture destructions, between building block, relative displacement occurs, play the effect cushioning release, each building block has 35mm ~ 40mm allows compressive strain amount; Building block has spherical groove, improve the vertical stress of building block, the solid block comparatively with size both alleviated quality, in turn saved material, and the gap formed between building block does not affect the current or movement of rubber-tired cart and equipment train.

The present invention adopts and carries out shop fixtures with the building block of rib and spherical groove, not only meet level and allow pressure and the requirement of vehicle pass-through, compared with laying the concrete of condition of equivalent thickness, greatly reduce concrete consumption, and can recycling be carried out when building block does not damage, save cost, improve production efficiency, there is good economic benefit; Building block makes simple, and site operation is convenient, has good popularizing application prospect.

Accompanying drawing explanation

Fig. 1 is the structural representation of the building block with two ribs;

Fig. 2 is the structural representation of the building block with three ribs;

Fig. 3 is the structural representation of rib;

Fig. 4 is the structural representation of spherical groove;

Fig. 5 is the structural representation of the roadway floor after adopting the building block with two ribs to reinforce;

Fig. 6 is the structural representation of the roadway floor after adopting the building block with three ribs to reinforce;

Wherein, 1-main body, 2-rib, 3-groove, 4-tunnel is helped;

A-block main body length (width), H-building block (rib) highly, D-rib spacing, l ₁-rib trapezoidal cross-section upper base width, l ₂-rib trapezoidal cross-section is gone to the bottom width, d-rib width, the degree of depth of h-spherical groove, R-spherical groove place radius of a ball, D ₁the vertical frontier distance of-outside rib distance building block, D ₂-adjacent rib spacing.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

When the width of block main body 1 area minimum lateral is 400mm ~ 500mm, this side is provided with two ribs 2, and rib space D is: rib trapezoidal cross-section upper base width l ₁for: l ₁=(l ₂-10) mm, rib trapezoidal cross-section is gone to the bottom width l ₂for: 30mm ~ 40mm, rib width d is: 40mm ~ 50mm; The degree of depth h of spherical groove is: $\frac{1}{3}H\≤h\≤\frac{1}{2}H,$ Spherical groove place radius of a ball R is: $\frac{1}{4}a\≤R\≤\frac{1}{3}a.$

When the width of block main body 1 area minimum lateral is 500mm ~ 600mm, this side is provided with the rib 2 that three spacing are identical, outside rib is apart from the vertical frontier distance D of building block ₁for: adjacent rib space D ₂for: rib trapezoidal cross-section upper base width l ₁for: l ₁=(l ₂-10) mm, rib trapezoidal cross-section is gone to the bottom width l ₂for: 30mm ~ 40mm, rib width d is: 40mm ~ 50mm; The degree of depth h of spherical groove is: spherical groove place radius of a ball R is:

Embodiment one: as shown in Fig. 1, Fig. 3 ~ Fig. 5, a kind of have level allow pressure energy-absorbing function roadway floor reinforcement means, the method adopts building block to reinforce, and described building block, comprises main body 1, described main body 1 is square, block main body length (width) a is 400mm, and building block (rib) height H is 180mm, and the side upright side walls of square is provided with two ribs 2, two ribs 2 are identical apart from the vertical frontier distance of building block, and rib space D is 160mm; Described building block adopts concrete for making, and concrete proportioning adopts C30 concrete proportioning, i.e. cement: sand: stone: water=1:1.87:3.05:0.48(weight ratio); Described rib 2 cross section is trapezoidal, rib trapezoidal cross-section upper base width l ₁for 25mm, rib trapezoidal cross-section is gone to the bottom width l ₂for 35mm, rib width d is 50mm; Described block main body 1 bottom centre is provided with groove 3, and described groove 3 is spherical, and the degree of depth h of spherical groove is 80mm, and spherical groove place radius of a ball R is 120mm.The method comprises the steps:

Step one: spread one deck sand at roadway floor, so that smooth roadway floor;

Step 2: building block is laid on roadway floor, the groove 3 of building block is placed down, make the rib 2 of building block perpendicular to tunnel side 4, and the rib 2 of building block is towards right side, the rib 2 in 4 adjacent building blocks is helped in excision and tunnel, right side, make between adjacent block, block main body 1 and tunnel, both sides between help 4 mutual extrude sturdy.

Embodiment two: as shown in Fig. 2 ~ Fig. 4, Fig. 6, a kind of have level allow pressure energy-absorbing function roadway floor reinforcement means, the method adopts building block to reinforce, described building block, comprises main body 1, and described main body 1 is square, block main body length (width) a is 600mm, building block (rib) height H is 180mm, and the side upright side walls of square is provided with three ribs 2, and outside rib is apart from the vertical frontier distance D of building block ₁be 120mm, adjacent rib space D ₂for 180mm; Described building block adopts concrete for making, and concrete proportioning adopts C30 concrete proportioning, i.e. cement: sand: stone: water=1:1.87:3.05:0.48(weight ratio); Described rib 2 cross section is trapezoidal, rib trapezoidal cross-section upper base width l ₁for 25mm, rib trapezoidal cross-section is gone to the bottom width l ₂for 35mm, rib width d is 50mm; Described block main body 1 bottom centre is provided with groove 3, and described groove 3 is spherical, and the degree of depth h of spherical groove is 80mm, and spherical groove place radius of a ball R is 150mm.The method comprises the steps:

Step one: spread one deck sand at roadway floor, so that smooth roadway floor;

Step 2: building block is laid on roadway floor, the groove 3 of building block is placed down, make the rib 2 of building block perpendicular to tunnel side 4, and the rib 2 of building block is towards right side, the rib 2 in 4 adjacent building blocks is helped in excision and tunnel, right side, make between adjacent block, block main body 1 and tunnel, both sides between help 4 mutual extrude sturdy.

Claims (3)

1. have level allow pressure energy-absorbing function a roadway floor reinforcement means, it is characterized in that the method adopt building block reinforce, described building block, comprises main body, and described main body is cuboid, and the side that cuboid area is minimum is provided with several ribs; Bottom described block main body, be provided with groove, described groove is spherical, and the method comprises the steps:

Step one: smooth roadway floor;

Step 2: building block be laid on roadway floor, the rib of building block is helped perpendicular to tunnel, and the rib of building block is towards same direction; The building block of next-door neighbour tunnel side is cut, makes between adjacent block, block main body and tunnel, both sides between help mutual extrude sturdy.

2. according to claim 1 have level allow pressure energy-absorbing function roadway floor reinforcement means, it is characterized in that described building block adopt concrete for making.

3. according to claim 1 have level allow pressure energy-absorbing function roadway floor reinforcement means, it is characterized in that described rib cross section is trapezoidal.