CN203756206U - Novel soft-rock roadway floor heave governing structure - Google Patents

Novel soft-rock roadway floor heave governing structure Download PDF

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Publication number
CN203756206U
CN203756206U CN201420122074.8U CN201420122074U CN203756206U CN 203756206 U CN203756206 U CN 203756206U CN 201420122074 U CN201420122074 U CN 201420122074U CN 203756206 U CN203756206 U CN 203756206U
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CN
China
Prior art keywords
roadway
rock
base plate
roadway floor
pressure relief
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CN201420122074.8U
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Chinese (zh)
Inventor
刘进晓
景继东
吴磊
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山东科技大学
新汶矿业集团(伊犁)能源开发有限责任公司
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Priority to CN201420122074.8U priority Critical patent/CN203756206U/en
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Publication of CN203756206U publication Critical patent/CN203756206U/en

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Abstract

The utility model discloses a novel soft-rock roadway floor heave governing structure. An arc-shaped pit is dug in a roadway base plate, a pressure relief groove is dug in the bottom of the arc-shaped pit, and extends in the axial direction of a roadway, a cover plate is arranged on the groove opening of the pressure relief groove in a sealing mode, and an inverted arch is laid on the arc-shaped pit, and is formed by pressing stone building blocks, the inverted arch is fixed to roadway base plate surrounding rock through high-strength anchors in floor, gangue gravels are laid on the inverted arch, and a grade level is arranged on the gangue gravels. According to the novel soft-rock roadway floor heave governing structure, controlled yielding is carried out on the base plate through grooving in the roadway base plate for pressure relief and combined supporting of the building block inverted arch, the stress state of the base plate surrounding rock is changed, a base plate rock stratum is made to be located in a stress decreasing area, the problem of soft-rock roadway floor heaves is controlled, repair for the roadway is avoided, the supporting cost is low, no pollutants are generated, and the application prospect is wide.

Description

A kind of novel Soft Rock Roadway Floor Heave administration structure

Technical field

The utility model belongs to Roadway Support Technology field, relates to a kind of novel Soft Rock Roadway Floor Heave administration structure, is applicable to the improvement to high ground stress soft rock stress floor lift in gallery problem under coal mine.

Background technology

Along with continuing to increase of the pit mining degree of depth, be subject to the impact of high-ground stress, soft rock problem heals and becomes serious, and end distension phenomenon has become one of the principal character of country rock of soft rock roadway deformation and failure and form.End distension causes drift section to dwindle, and hinders transport and personnel's walking, hinders and ventilates, and many mines have to drop into a large amount of human and material resources, and the mine that end distension is serious even can cause whole tunnel to scrap, and has had a strong impact on safety and the production of mine.

In recent years, domestic and international many experts and scholars to coal mine roadway at the bottom of distension mechanism and control technology done a large amount of research work, obtained large quantities of important achievements in research, many end distension control practical techniques have been proposed.But because soft rock has unique character, the continuous increase of mining depth or be subject to mining influence in addition, end distension phenomenon shows very outstandingly.The extremely complexity of roadway surrounding rock character, ambient stress and geological environment, causes some cause recognitions of Soft Rock Roadway Floor Heave unclearly, thereby in the time taking prophylactico-therapeutic measures, has larger blindness.

The method of controlling at present floor lift in gallery mainly contains floor grouting, base plate anchor pole, closed support, block arch and arch of the anti-end of concrete etc.Wherein, 1. floor grouting, be mainly used to reinforcing soleplate broken rock, slurries mainly contain the slurry infiltrations such as cement paste, polyurethane, high-water material between rock crack, increase the cohesion between fractured rock, in base plate, form the arch of the anti-end that strength ratio broken rock is large, thus stoped to a certain extent rock stratum, bottom upwards distension rise; 2. base plate anchor pole, mainly contain two effects, the one, unsettled superficial part rock stratum with stablize rock stratum below and be bound up, the 2nd, form combination rock beam by base plate anchor pole at roadway floor, open and the newly generation in crack in the crack that inhibition rock stratum, bottom causes because of dilatation, meanwhile, also can limit rock stratum, bottom upwards distension rise; 3. closed support, the counter-force applying to floor strata by the bottom girder of closed support has improved the integer support resistance of support, also increased the Support Resistance of distension at the bottom of support control, change near the stress state of floor strata, thereby suppress to a certain extent the generation of floor strata dilatation, bending and dilatancy; 4. the anti-end of concrete arch, the suitable permanent tunnel of this method, arch of the anti-end has compared with high and uniformity acts on the Support Resistance on base plate.

Although the said method being enumerated to can play the effect of distension at the bottom of certain inhibition, in the tunnel that has distension trend of the strong end, not only high material consumption, supporting expense are high, and can not really play the effect of controlling end distension.In addition, said method also has following shortcoming: the service condition of (1) floor grouting is, the rock stratum more than final collapse dept of floor strata is loose shape, it generally just can play the effect that reduces end distension amount after once acting as a planted agent, in extremely loose, broken rock stratum, slip casting is not necessarily effective; (2) only can contracting amount to be greater than under the condition of Soft Rock Roadway Floor Heave amount guarantee at it effective for closed support, otherwise, the end of when, distension amount exceedes after nominal yield of support, foot-piece is likely heaved in lane space, lose the control action to base plate, bring great difficulty to undercover work simultaneously; (3) under many circumstances, base plate anchor pole lost efficacy because anchor foundation in Loose floor rock stratum poor and anchored force deficiency or elongation do not mate with end distension amount; (4) to encircle not only the engineering time long at the concrete anti-end, and cost is high, when roadway floor again occurs when distension the end, is difficult to again rise bottom reason, and the transport in tunnel is interrupted, and arch of the anti-concrete end need to be destroyed completely.

Destressing method mainly carries out release by certain methods such as joint-cuttings, makes floor rock in stress relaxed area, thereby keeps the stable of base plate.But in this method is preferably used rock stratum lower in intensity, that end distension is more serious, because in the higher rock stratum of intensity, use these measure meetings to bring high expense.

Utility model content

For the above-mentioned technical problem existing in prior art, the utility model proposes a kind of novel Soft Rock Roadway Floor Heave administration structure, adopt the combined supporting of arch of the anti-end of the release of roadway floor fluting and building block to have control allow pressure, change the surrouding rock stress state of soft-rock tunnel base plate, make floor strata in stress relaxed area, to reach the object of administering Soft Rock Roadway Floor Heave.

To achieve these goals, the utility model adopts following technical scheme:

A kind of novel Soft Rock Roadway Floor Heave administration structure has dug arc hole groove on roadway floor, and the bottom of described arc hole groove has dug a pressure relief groove, and pressure relief groove stretches along tunnel axial direction; Notch place shutoff at pressure relief groove has cover plate; On the groove of described arc hole, lay arch of the anti-end, arch of the anti-end is mutually pushed and forms by stone material building block; Arch of the anti-end is fixed on roadway floor country rock by high strength base angle anchor pole, above arch of the anti-end, is equipped with broken spoil, and broken spoil top is terrace.

Further, above-mentioned cover plate is made up of iron plate material.

Further, above-mentioned terrace is formed by concreting.

The utility model has the advantages that:

The utility model adopts in roadway floor fluting release and sets the combined supporting encircleing at the anti-end of high strength base angle bolt anchorage building block, can effectively control Soft Rock Roadway Floor Heave; The effect of off-load and buffering of pressing that allows has been played in the reserved space of pressure relief groove, discharge superficial part surrouding rock stress, maximum stress is shifted to country rock deep, this kind of stress transfer not only controlled the deformation and failure of tunnel superficial part country rock, and the carrying scope that makes country rock showing and increase, take full advantage of the supporting capacity of deep wall rock; Simultaneously, occur that when floor strata is squeezed the end is when distension phenomenon, high strength base angle anchor pole can improve the intensity that base angle, tunnel opposing shearing slip destroys, and area of stress concentration is shifted to deep, tunnel, thereby reduce the impact of roadway surrounding rock stress on base plate, reduced roadway deformation; Arch of the anti-end large by compressive strength and that the good stone material building block of microstructure forms can improve its supporting capacity and compressive strength, thereby greatly reduces costs.The utility model is particularly useful for the improvement of high-ground stress Coal Under ore deposit Soft Rock Roadway Floor Heave.

Brief description of the drawings

Fig. 1 is the schematic diagram of novel Soft Rock Roadway Floor Heave administration structure in the utility model;

Wherein, 1-pressure relief groove, 2-cover plate, the building block of 3-stone material, arch of the anti-end of 4-, 5-high strength base angle anchor pole, the broken spoil of 6-, 7-terrace, 8-tunnel, 9-arc hole groove.

Detailed description of the invention

Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail:

Shown in Fig. 1, a kind of novel Soft Rock Roadway Floor Heave administration structure, comprises tunnel 8, has dug arc hole groove 9 on roadway floor, and the length direction of arc hole groove 9 is consistent with the axial direction in tunnel 8.Bottom at arc hole groove 9 has dug a pressure relief groove 1 downwards, and pressure relief groove 1 stretches along the length direction of arc hole groove 9, has cover plate 2 in the notch place shutoff of pressure relief groove 1, and preferably, cover plate 2 adopts iron plate material to make.On the groove 9 of arc hole, lay arch of the anti-end 4, arch 4 of the anti-end is formed by stone material building block 3 extruding, and stone material building block 3 is for having high compressive strength and the better stone material building block of microstructure.Arch of the anti-end 4 is fixed on roadway floor country rock by high strength footing anchor pole 5, and high strength base angle anchor pole 5 will apply the prestressing force of some strength.Above arch of the anti-end 4, be equipped with broken spoil 6, cover plate 2 can stop broken spoil 6 to enter pressure relief groove 1.Broken spoil 6 tops are terrace 7, and terrace 7 is formed by concreting.

The forming process of Soft Rock Roadway Floor Heave administration structure is roughly as follows:

A, on roadway floor, dig out arc hole groove 9;

B, in arc hole, groove 9 bottom center are dug out a pressure relief groove 1 along tunnel axial direction, and the notch of pressure relief groove 1 are covered with cover plate 2;

C, on the groove 9 of arc hole, lay adopts the large and good stone material building block of microstructure of compressive strength to lay arch of the anti-end 4;

D, the high strength base angle anchor pole 5 of constructing on arch of the anti-end 4 are fixed on arch of the anti-end in floor rocks;

E, above anti-end arch 4, lay broken spoil 6;

F, on broken spoil 6, build one deck concrete floor.

It should be noted that, in steps A, in arc hole groove 9 and step B, pressure relief groove 1 almost excavates simultaneously.The combined supporting that the utility model utilizes the release of roadway floor fluting and arch of the anti-end of bolt anchorage building block has control allow pressure to base plate, change the stress state of floor rocks, make floor strata in stress relaxed area, control the problem of Soft Rock Roadway Floor Heave, avoid the reclamation work in tunnel, support cost is low, pollution-free, has a extensive future.

Certainly; more than explanation is only preferred embodiment of the present utility model; the utility model is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this manual; that makes is allly equal to alternative, obvious variant, within all dropping on the essential scope of this manual, ought to be subject to protection of the present utility model.

Claims (3)

1. a novel Soft Rock Roadway Floor Heave administration structure has dug arc hole groove on roadway floor, it is characterized in that, the bottom of described arc hole groove has dug a pressure relief groove, and pressure relief groove stretches along tunnel axial direction; Notch place shutoff at pressure relief groove has cover plate; On the groove of described arc hole, lay arch of the anti-end of building block, arch of the anti-end is mutually pushed and forms by stone material building block; Arch of the anti-end is fixed on roadway floor country rock by high strength base angle anchor pole, above arch of the anti-end, is equipped with broken spoil, and broken spoil top is terrace.
2. the novel Soft Rock Roadway Floor Heave administration structure of one according to claim 1, is characterized in that, described cover plate is made up of iron plate material.
3. the novel Soft Rock Roadway Floor Heave administration structure of one according to claim 1, is characterized in that, described terrace is formed by concreting.
CN201420122074.8U 2014-03-19 2014-03-19 Novel soft-rock roadway floor heave governing structure CN203756206U (en)

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Application Number Priority Date Filing Date Title
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106014443A (en) * 2016-05-10 2016-10-12 山东科技大学 Method for preventing roadway floor heaving and wall sliding of gob-side entry retaining
CN106401609A (en) * 2016-11-10 2017-02-15 河南理工大学 Bottom plate pressure relief and reinforcement structure for controlling floor heave of deep roadway and construction method of bottom plate pressure relief and reinforcement structure
CN106640125A (en) * 2015-10-30 2017-05-10 山东科技大学 Positive and negative protection combined construction technology of modularized prevention of base plate deformation
CN108194097A (en) * 2017-12-29 2018-06-22 山东科技大学 A kind of convex energy-absorbing bearing structure for preventing floor lift in gallery
CN108595807A (en) * 2018-04-15 2018-09-28 西安科技大学 A kind of computational methods of roadway floor release well width
CN109184733A (en) * 2018-08-22 2019-01-11 山东建筑大学 Soft rock chamber pucking based on prefabricated assembled bottom arc plate administers supporting construction and method
CN109184749A (en) * 2018-11-14 2019-01-11 中国科学院武汉岩土力学研究所 A kind of deep-well high stress weak broken floor lift in gallery control method
CN109268017A (en) * 2018-09-14 2019-01-25 中国矿业大学 A method of control high stress breaking surrounding rock main entry pucking
CN109681237A (en) * 2018-12-20 2019-04-26 上海应用技术大学 A kind of supporting construction and construction method of Soft Rock Roadway Floor Heave

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640125A (en) * 2015-10-30 2017-05-10 山东科技大学 Positive and negative protection combined construction technology of modularized prevention of base plate deformation
CN106014443A (en) * 2016-05-10 2016-10-12 山东科技大学 Method for preventing roadway floor heaving and wall sliding of gob-side entry retaining
CN106014443B (en) * 2016-05-10 2017-12-01 山东科技大学 A kind of method of the Floor Heave in Roadway for preventing gob side entry retaining and wall sliding
CN106401609A (en) * 2016-11-10 2017-02-15 河南理工大学 Bottom plate pressure relief and reinforcement structure for controlling floor heave of deep roadway and construction method of bottom plate pressure relief and reinforcement structure
CN108194097A (en) * 2017-12-29 2018-06-22 山东科技大学 A kind of convex energy-absorbing bearing structure for preventing floor lift in gallery
CN108595807A (en) * 2018-04-15 2018-09-28 西安科技大学 A kind of computational methods of roadway floor release well width
CN109184733A (en) * 2018-08-22 2019-01-11 山东建筑大学 Soft rock chamber pucking based on prefabricated assembled bottom arc plate administers supporting construction and method
CN109268017A (en) * 2018-09-14 2019-01-25 中国矿业大学 A method of control high stress breaking surrounding rock main entry pucking
CN109184749A (en) * 2018-11-14 2019-01-11 中国科学院武汉岩土力学研究所 A kind of deep-well high stress weak broken floor lift in gallery control method
CN109681237A (en) * 2018-12-20 2019-04-26 上海应用技术大学 A kind of supporting construction and construction method of Soft Rock Roadway Floor Heave

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