CN205532633U

CN205532633U - Tunnel bottom plate reinforcerment system

Info

Publication number: CN205532633U
Application number: CN201620352772.6U
Authority: CN
Inventors: 李万峰; 何礼品; 孟献录; 王传兵; 乔保峰; 侯俊领
Original assignee: Huainan Mining Group Co Ltd
Current assignee: Huainan Mining Group Co Ltd
Priority date: 2016-04-21
Filing date: 2016-04-21
Publication date: 2016-08-31
Anticipated expiration: 2026-04-21

Abstract

The utility model belongs to the technical field of the mine safety construction, concretely relates to tunnel bottom plate reinforcerment system, the shallow injected hole of offering on the bottom plate of tunnel, well injected hole and dark injected hole, the degree of depth of shallow injected hole, well injected hole and dark injected hole scales up in proper order, shallow injected hole, well injected hole and the dark equal array of injected hole have been arranged a plurality ofly, and each shallow injected hole, well injected hole and the dark mutual staggered arrangement of injected hole, the system is still including being used for the slip casting hole packer to carrying out slip casting in each injected hole. The utility model discloses effectual geology area, crushed zone, the argillization bottom plate area unusually of having reinforced has increased the stability of bottom plate country rock, has effectively solved bottom plate pucking problem, adopts the slip casting hole packer to replace the slip casting of former slip casting steel pipe not only to save the material, has also solved the unreal difficult problem of bottom plate slip casting shutoff simultaneously, be one kind effective, the easy -operating bottom plate slip casting of the economy technique of reinforcing.

Description

A kind of roadway floor hardened system

Technical field

This utility model belongs to mine safety technical field of construction, is specifically related to a kind of roadway floor hardened system.

Background technology

Along with pit mining extends to deep, crustal stress constantly increases, and country rock attribute tends to soft rock, only leans on The intensity improving support material removes passive protecting, can not meet high-ground stress roadway support needs, it is necessary to main The dynamic bearing capacity playing country rock self, plays an active part in roadway support, to this end, carry out roadway damage country rock Grouting and reinforcing becomes the Main Means increasing tunnel globality.Roadway floor non-support belongs to single load bearing, increases The intensity adding floor rock self is to ensure that the measuring body effective way of base plate.At present, roadway floor is controlled Method mostly is, at the bottom of band arch U-shaped steel collapsible timbering, underplate concrete casting method, construction base plate anchor pole method, The floor reinforcement technique such as floor grouting method, these methods solve base plate pucking amount in varying degrees, but construct The reasons such as technique falls behind, slow, the later stage difficult treatment of progress, gradually eliminate.Having slurry injection technique only is the current end Most efficient method reinforced by plate.Traditional method is first to construct before slip casting one layer and have sufficient intensity and thickness at present Concrete stop pulp layer, use the Grouting Pipe of different length to floor grouting.If base plate relaxation zone is big, slip casting The bad molding in hole, injection hole sealing is more difficult, and Grouting Pipe is only single use, and Grouting Pipe waste is many, base plate There is potential safety hazard in the slip casting tube head exposed.Also there is no effective solution both at home and abroad at present.

Utility model content

Technical problem to be solved of the present utility model is that how decreasing concrete stops pulp layer construction, note Starch the waste of pipe and guarantee continuous grouting.

This utility model solves above-mentioned technical problem by the following technical solutions: a kind of roadway floor reinforces system System, including the shallow injected hole offered on roadway floor, middle injected hole and deep injected hole, described shallow injected hole, The degree of depth of middle injected hole and deep injected hole is incremented by successively, and described shallow injected hole, middle injected hole and deep injected hole are equal Array is disposed with multiple, and each shallow injected hole, middle injected hole and the deep interlaced layout of injected hole；System is also Including the fluid filling hole sealing device for carrying out slip casting in each injected hole；

Preferably, described shallow injected hole is positioned at the center of adjacent four middle injected holes, makes shallow injected hole and middle note Slurry hole constitutes five flower distributions；

Preferably, the hole depth of described shallow injected hole is 600mm, between each shallow injected hole array pitch be 2000 × 3000mm；

Preferably, the hole depth of described middle injected hole is 1500mm, between each middle injected hole array pitch be 2000 × 3000mm；

Preferably, the degree of depth of described deep injected hole is 2500mm, between each deep injected hole array pitch be 2000 × 3000mm。

The utility model has the advantage of: this utility model effectively strengthen geological anomaly zone, crushed zone, Argillization base plate band, adds the stability of floor rocks, efficiently solves base plate pucking problem, uses slip casting It is unreal that hole packer replaces original annotation slurry steel pipe slip casting also to solve floor grouting closure while of not only saving material A difficult problem, is a kind of effective, economic easy-operating floor grouting reinforcement technique.

Accompanying drawing explanation

Fig. 1 is slip casting schematic diagram of the present utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in detail.

As it is shown in figure 1, a kind of roadway floor hardened system, including the shallow injected hole 1 offered on roadway floor, Middle injected hole 2 and deep injected hole 3, the degree of depth of described shallow injected hole 1, middle injected hole 2 and deep injected hole 3 depends on Secondary incremental, described shallow injected hole 1, middle injected hole 2 and the deep equal array of injected hole 3 are disposed with multiple, and each shallow Injected hole 1, middle injected hole 2 and the deep interlaced layout of injected hole 3；System also includes for each injected hole Inside carry out the fluid filling hole sealing device 4 of slip casting.The safe construction that described fluid filling hole sealing device 4 is commonly used for coal production field Equipment, mainly includes expanded capsule and runs through the grouting pipeline that expanded capsule is arranged, expanded capsule is connected to Expanding pipeline, expand pipeline and be filled with in expanded capsule by serosity, expanded capsule produces crowded with the hole wall of injected hole Pressure, reaches sealing of hole effect, is then carrying out slip casting by grouting pipeline；After slip casting terminates, by expanded capsule Pressure release, can extract out fluid filling hole sealing device 4, can be recycled.

Preferably, described shallow injected hole 1 is positioned at the center of adjacent four middle injected holes 2, makes shallow injected hole 1 Five flower distributions are constituted with middle injected hole 2.After shallow injected hole 1 is carried out slip casting, it is possible to middle injected hole 2 points The uniform curtain only pulp layer as the slip casting of middle injected hole 2 is formed on cloth region.

In this embodiment, the hole depth of described shallow injected hole 1 is 600mm, and between each shallow injected hole 1, array pitch is 2000×3000mm；The hole depth of described middle injected hole 2 is 1500mm, and between each middle injected hole 2, array pitch is 2000 ×3000mm；The degree of depth of described deep injected hole 3 is 2500mm, between each deep injected hole 3 array pitch be 2000 × 3000mm。

Preferably, the grouting cement in shallow injected hole 1 is the portland cement that hardening is fast, and the ratio of mud is 1:1.5； Grouting cement in middle injected hole 2 is Portland cement, and the ratio of mud can be selected for 1:1；In deep injected hole 3 Grouting cement be Portland cement, the ratio of mud is 1:1～0.8.Described grouting serous fluid, for cost-effective The single slurry of many employings, forms only pulp layer as early as possible for accelerating Shallow hole grouting, and Shallow hole grouting uses early-strength silicate Cement, adds the setting percentage of large cement, uses the ratio of ratio of mud 1:1.5, it is ensured that knot for less space pressure Real rate is up to 98%.Medium-length hole slip casting, for increasing the diffusion area of serosity, slurry water gray scale reduces.

The construction method of above-mentioned roadway floor hardened system comprises the steps:

Step 1: at the roadway floor shallow injected hole 1 of construction, hole depth 600mm, an array pitch: 2000 × 3000mm.

Step 2: until shallow injected hole 1: after construction terminates, fluid filling hole sealing device 4 is inserted slip casting shallow bore hole, connects Grouting Pipe starts slip casting, and grouting cement selects the portland cement that hardening is fast, and the ratio of mud typically selects 1:1.5, Serosity exposes and i.e. stops, and changes hole slip casting, and this circulation treats that serosity and shallow-layer country rock condense into one layer of curtain 5 repeatedly.

Step 3: after the slip casting of shallow injected hole 1 terminates to form curtain 5, injected hole 2 in construction, hole depth 1500mm, Between array pitch: 2000 × 3000mm, form five figured cloths with shallow injected hole 1 and put, utilize the curtain that shallow layer grouting is formed 5 do only pulp layer band pressure grouting, and grouting cement selects Portland cement, and the ratio of mud selects 1:1, slip casting pressure Power brings up to 1～2MP, can extract fluid filling hole sealing device 4 out, change hole slip casting after voltage stabilizing；This stage grouting pressure is too It is easily caused greatly base plate bulge.

Step 4: after alternately slip casting puts in place until injected hole 2 shallow, middle, deep injected hole 3 of constructing, hole depth 2500mm, Between array pitch: 2000 × 3000mm, the curtain 5 utilizing injected hole 2 slip casting shallow, middle to be formed carries out high-pressure slip-casting, Grouting cement selects Portland cement, and the ratio of mud selects 1:1～0.8, and grouting pressure brings up to 3～4MP, Extract fluid filling hole sealing device 4 after voltage stabilizing out, change hole slip casting.Water in roadway floor country rock is cemented out by serosity, and Condense into an entirety with deep layer rock, eliminate floor rock water-swellable, be finally reached reinforcing soleplate country rock Purpose.

Step 5: along with tunnel is pushed ahead, step 2,3,4 operations circulation carry out, final floor grouting reaches It is as the criterion to design grouting pressure.

In the present embodiment, the final setting time of the grouting cement in described shallow injected hole 1 is not more than 6.5h, solid Rate more than 98%.The final setting time of the grouting cement in described middle injected hole 2 is not more than 10h, setting percentage 78% Above.The final setting time of the grouting cement in described deep injected hole 3 is not more than 10h, setting percentage more than 78%.

Described shallow, in, deep hole grouting be only comparatively speaking, Shallow hole grouting pressure does not has occurrence requirement, Base plate returns slurry and i.e. stops, and mesopore slip casting requires pressure stability 1～2MP, and deep hole grouting pressure stability at 4MP is Terminate for slip casting.Slip casting effect uses note clear water pressure measurement force method or employing hole internal water accumulation observational method to carry out effect and comment Fixed.

The foregoing is only the preferred embodiment of the invention, not in order to limit this utility model wound Make, any amendment, equivalent and the improvement made within all spirit in this utility model creation and principle Deng, within should be included in the protection domain that this utility model is created.

Claims

1. a roadway floor hardened system, it is characterised in that: the shallow injected hole that includes offering on roadway floor, Middle injected hole and deep injected hole, the degree of depth of described shallow injected hole, middle injected hole and deep injected hole is incremented by successively, Described shallow injected hole, middle injected hole and the deep equal array of injected hole are disposed with multiple, and each shallow injected hole, middle note Slurry hole and the interlaced layout of deep injected hole；System also includes the slip casting for carrying out slip casting in each injected hole Hole packer.

Roadway floor hardened system the most according to claim 1, it is characterised in that: described shallow injected hole It is positioned at the center of adjacent four middle injected holes, makes shallow injected hole and middle injected hole constitute five flower distributions.

Roadway floor hardened system the most according to claim 1, it is characterised in that: described shallow injected hole Hole depth be 600mm, between each shallow injected hole, array pitch is 2000 × 3000mm.

Roadway floor hardened system the most according to claim 1, it is characterised in that: described middle injected hole Hole depth be 1500mm, between each middle injected hole, array pitch is 2000 × 3000mm.

Roadway floor hardened system the most according to claim 1, it is characterised in that: described deep injected hole The degree of depth be 2500mm, between each deep injected hole, array pitch is 2000 × 3000mm.