CN104832174B - The method that the other bilateral up second mining of whole filling of a kind of post pedals sky coal seam - Google Patents

The method that the other bilateral up second mining of whole filling of a kind of post pedals sky coal seam Download PDF

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Publication number
CN104832174B
CN104832174B CN201510116481.7A CN201510116481A CN104832174B CN 104832174 B CN104832174 B CN 104832174B CN 201510116481 A CN201510116481 A CN 201510116481A CN 104832174 B CN104832174 B CN 104832174B
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coal seam
sky
tool post
exploiting field
mining
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CN201510116481.7A
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CN104832174A (en
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冯国瑞
白锦文
张玉江
周小建
郭军
戚庭野
李典
贾学强
康立勋
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太原理工大学
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/005Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/08Filling-up hydraulically or pneumatically

Abstract

The invention discloses the method that the other bilateral up second mining of whole filling of a kind of post pedals sky coal seam.This invention is on the basis of differentiation is pedaled sky coal seam Upward mining feasibility, verified tool post formula residual exploiting field coal column group and dead zone group's distribution situation, the method side successively using the other whole filling of bilateral of post has been protected and has been pedaled sky coal seam and underlie tool post formula residual exploiting field coal column group, and gradually sky coal resources are pedaled in extraction.Tool post formula coal column can not only be all risen to side and be protected effect by the other bilateral obturator of the post that this invention is formed in the group of dead zone, and common supporting body can be formed therewith, and then reduce stress concentration degree and the deformation of creep of coal column group, strengthen long-time stability, avoid Local Instantaneous unstability or the unstable failure of " dominoes " formula, and ultimate guarantee tool post formula residual exploiting field overlying pedals the safe working in sky coal seam.

Description

The method that the other bilateral up second mining of whole filling of a kind of post pedals sky coal seam

Technical field

The present invention relates to technical field of coal exploitation, especially relate to the other bilateral up second mining of whole filling of a kind of post and pedal sky coal seam Method, is primarily adapted for use in tool post formula residual exploiting field overlying and pedals the safe working in sky coal seam.

Background technology

Currently, coal resources finiteness and the contradiction of consumption demand unlimitedness thereof.Residual coal second mining is to slow down above-mentioned lance The Important Action of shield.Residual coal second mining is possible not only to improve the recovery ratio of coal resources, enterprise economic benefit, and can prolong Long mine service-life, promote sustainable development.

In recent years, residual exploiting field, colliery Upward mining increasingly becomes focus of concern.By mining influence in advance, residual exploiting field is pedaled Empty coal seam and the integrity of floor strata and stability thereof all suffer from damage in various degree, and then may cause mine disaster, Impact safety in production.Therefore, residual exploiting field overlying is pedaled sky safely mining of coalbed feasibility assessment and is determined to be the primary of Upward mining Task.Traditionally, the method for discrimination of residual exploiting field Upward mining feasibility specifically include that " three band " diagnostic method, country rock counterbalanced procedure, Ratio discriminatory method and mathematics analytic process etc..CN101109283B pedals sky coal seam from the angle quantitative identification of interlayer strata structure The feasibility of Upward mining;CN104239697A uses PCA to be first modeled Upward mining influence factor, then uses variance tribute Rate of offering carries out weight calculation to institute's established model, and then have rated the feasibility of Upward mining;CN103147737A provides one The detection method of Upward mining Overburden Failure Law, discloses the temporal and spatial evolution of Overburden Rock Failure during Upward mining, solves The problem that Upward mining work surface and roadway layout rationally determine, it is ensured that the safety of Upward mining.Aforementioned pedal on sky coal seam The method of discrimination of row mining feasibility is mainly angularly studied from interlayer depth of stratum and stability thereof, and it can realize residual The differentiation in advance of Deng Kong coal seam, exploiting field Upward mining feasibility and evaluation, and then instruct engineering practice.

But, the theoretical research of existing Upward mining and engineering practice rarely have the stability paying close attention to tool post formula residual exploiting field coal column group to pedaling The impact of empty safely mining of coalbed.The stability of tool post formula residual exploiting field coal column group governs to be pedaled the safety of sky coal seam Upward mining and carries out, It pedals sky coal seam and floor strata one cogeneration system of composition thereof with overlying.Along with gradually forming of the residual exploiting field of tool post formula, stope should Power redistributes because of the releasing of coal column lateral stress.So stress of tool post formula Remnant mining coal column will be by being originally uniformly distributed Load become Relatively centralized distribution load, and gradually pedal to overlying sky seat earth rock stratum is spread with transmission.In this process In, tool post formula residual exploiting field coal column can from outward appearance to inner essence occur creep rupture, and its effective bearing area is also gradually reduced, and thus can Cause the distribution again of concentrated stress to expand the surrender width of coal column further, reduce the width in its elastic kernel district.When tool post formula When the effective bearing area of residual exploiting field coal column continues to be reduced to its ultimate bearing area, instantaneous unstable failure will occur.This Time, the destruction ripple that the instantaneous unstability of above-mentioned coal column produces may shift and be diffused into adjacent coal column, causes tool post formula residual exploiting field coal column The unstable failure of group's " dominoes " formula, and then affect overlying and pedal sky coal seam and the globality of floor strata thereof and stability, Even produce the disasters such as bump, threaten safe and efficient production.

To sum up, need badly and find a kind of reinforcement and pedal sky coal seam and underlie the method for tool post coal column group's stability, and then effectively solve tool post formula Local Instantaneous unstability or the unstable failure of " dominoes " formula is there is in residual exploiting field coal column group during pedaling sky seam mining, and Ultimate guarantee pedals sky safely mining of coalbed.

Summary of the invention

The technical problem to be solved is: provide the method that the other bilateral up second mining of whole filling of a kind of post pedals sky coal seam, Efficiently solve tool post formula residual exploiting field coal column group and pedal sky coal seam Upward mining process generation Local Instantaneous unstability or " dominoes " The unstable failure of formula, has ensured the safety pedaling sky coal seam Upward mining.

For solving above-mentioned technical problem, the technical scheme is that the other bilateral up second mining of whole filling of a kind of post pedals sky coal seam Method pedal sky coal seam Upward mining feasibility, verify tool post formula residual exploiting field coal column group and the basis of dead zone group's distribution situation differentiating On, use the method side successively of the other bilateral filling of segmentation post to protect and pedal sky coal seam and underlie tool post formula residual exploiting field coal column group, and gradually adopt Go out to pedal sky coal resources.Described technical scheme specifically follows the steps below:

(1) differentiate that tool post formula residual exploiting field overlying pedals the feasibility of sky coal seam Upward mining;

(2) combining the original geology of mine, technical data, exploration finds out that pedaling sky coal seam underlies tool post formula residual exploiting field coal column group and dead zone The distribution situation of group, draws the distributional pattern figure of tool post formula residual exploiting field coal column group and dead zone group to instruct safety in production;

(3) driving pedals the stope drift active workings in sky coal seam, arranges and pedals sky working face of coal seam;

(4) hole from top to bottom pedaling sky working face of coal seam base plate, arrange the conveying pipe of dead zone, tool post formula residual exploiting field group's paste body filling Road;

(5) preparation fill paste, under the effect of filling pump, the mastic prepared uniformly is noted by the transfer pipeline along step (4) Enter in dead zone, end, tool post formula residual exploiting field so that it is end, setting and hardening exploiting field residual to tool post formula coal column produces side and protects effect;

(6) sky working face of coal seam is pedaled in propelling, in time exploiting 3-8m before line is advanced into next boundary line, tool post dead zone, stops advancing Work surface;

(7) repeat step (4), (5) and the construction technology of (6), use the mode side successively of the other whole filling of bilateral of post to protect Tool post formula residual exploiting field coal column group, and gradually sky coal resources are pedaled in extraction.

Preferably, described step (1) uses " three bands " diagnostic method, country rock counterbalanced procedure, ratio discriminatory method, mathematical analysis method It is that the quantitative identification method described in CN101109283B is carried out comprehensive distinguishing tool post formula residual exploiting field overlying and pedaled on sky coal seam with Authorization Notice No. The feasibility of row exploitation.

Preferably, described step (2) investigates thoroughly that by the investigation original geology of mine, technical data to pedal the sky coal seam tool post formula that underlies residual Dead zone, exploiting field group and the width of coal column group, highly, use three-dimensional laser scanner precisely detect tool post formula residual exploiting field dead zone group point Cloth orientation, size and volume.

Preferably, described step (3) pedals sky coal in the arranged above of end, tool post formula residual exploiting field coal column that step (2) is verified The stope drift active workings of layer and work surface.

Preferably, described step (4) uses casing drilling technology carry out drilling construction, bore dia d be 60 120mm, Pitch of holes l is 5 20m, hole tiltangleθ is 10 ° 60 °, drilling depth h is by interlayer depth of stratum H and bore inclining angle θ Determine.

Preferably, described step (5) is gangue/discarded concrete according to mass percent: flyash: cement: diminishing Agent: the ratio of water=45% 55%:15% 20%:10% 15%:3% 5%:15% 25%, compound concentration is 75% The fill paste of 85%, the distributed dimension of each dead zone, the residual exploiting field of tool post formula that amount of preparation is found out by step (2) exploration and distribution body Amass and determine.

Preferably, in described step (5), the Stress control of filling pump is at 2 6MPa.

Preferably, the advance distance pedaling sky working face of coal seam in described step (6) is [(a+b) ± 5] m;Wherein, a is cutter The width of dead zone, pillar residual exploiting field, b is the width of tool post formula residual exploiting field coal column.

Preferably, the width of the other bilateral obturator of described step (7) center pillar is equal to the width of dead zone, tool post formula residual exploiting field.

Use technique scheme, the invention have effective effect that:

This invention is pedaled sky coal seam Upward mining feasibility, is verified tool post formula residual exploiting field coal column group and dead zone group's distribution situation differentiating On the basis of, use the method side successively of the other whole filling of bilateral of post to protect and pedal sky coal seam and underlie tool post formula residual exploiting field coal column group, and by Gradually sky coal resources are pedaled in extraction.Post that this invention is formed in the group of dead zone other bilateral obturator tool post formula coal column can not only be all risen to Effect is protected in side, and can form common supporting body therewith, and then reduces stress concentration degree and the deformation of creep of coal column group, strengthens Long-time stability, it is to avoid Local Instantaneous unstability or the unstable failure of " dominoes " formula occur, and ultimate guarantee tool post formula is residual Exploiting field overlying pedals the safe working in sky coal seam.

Accompanying drawing explanation

Fig. 1 is that tool post formula residual exploiting field overlying pedals sky working face of coal seam layout schematic diagram;

Fig. 2 is the other filling schematic diagram of end, tool post formula residual exploiting field coal column post;

Fig. 3 is that tool post formula residual exploiting field overlying pedals sky working face of coal seam propelling schematic diagram;

Fig. 4 is the other bilateral whole filling three-dimensional effect diagram of dead zone, tool post formula residual exploiting field bundle pillar;

Fig. 5 is the other bilateral whole filling planar effect picture of dead zone, tool post formula residual exploiting field bundle pillar.

In figure: 1 pedals sky coal seam;2 interlayer rock stratum;3 tool post formula residual exploiting field coal columns;4 dead zone, tool post formula residual exploiting fields;5 Pedal sky working face of coal seam;The other bilateral whole fill line road of 6 posts;7 tool post formula residual exploiting field Filling mine-out area bodies;A tool post Formula residual exploiting field depletion region width;B tool post formula residual exploiting field coal pillar width;C tool post formula residual exploiting field Filling mine-out area body width.

Detailed description of the invention

Following example are intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.

In order to the technical goal of the present invention, feature and effect are had clearer understanding, fill in conjunction with the other bilateral part of accompanying drawing coupled columns Fill out row second mining to pedal the method in sky coal seam and be described in further detail.

The nineties in 20th century, Xishan coal electricity group Bai Jiazhuan colliery surmounts No. 6 coal seams and has preferentially exploited coal seam, bottom 8.At present, Bai Jiazhuan colliery 6 coal seam 36703 work surface ground location is positioned at mountain area, the ventilating shaft west and south, smelting valley, and down-hole is positioned at hole, south 1001 levels Seven panel right flanks, left front portion is 36502 work surface goafs, and left back portion is unworked country, and right part is 36701 work surface unworked countries, Bottom is 38502 tool post formula goafs, belongs to typical tool post formula residual exploiting field overlying and pedals sky coal seam.No. 8 coal seam 36502 tool post formulas are residual The stability of exploiting field coal column group seriously governs the safety that No. 6 coal seam 36703 work surfaces pedal null resource Upward mining and carries out.For Above-mentioned situation, is described in further detail the implementation process of the present invention below in conjunction with the accompanying drawings.

Step one, employing " three bands " diagnostic method, country rock counterbalanced procedure, ratio discriminatory method, mathematical analysis method and Authorization Notice No. are Quantitative identification method described in CN101109283B, the feasibility of No. 6 Deng Kong coal seam 1 Upward mining in colliery, the dialogue man village is comprehensively sentenced Other: pedaling in the warp damage that sky coal seam 1 is positioned at interlayer rock stratum 2, structural deterioration degree is less, only there occurs and moves integrally;8 Having, above number residual exploiting field of tool post formula, coal seam, the thick hard limestone that can play balanced action, it can ensure that pedaling sky coal seam 1 does not occur step The changing of the relative positions;The mining influence multiple pedaling sky coal seam 1 and No. 8 coal seams is 6.8;The interlamellar spacing that Upward mining is necessary is 10.4m, hence it is evident that little In pedaling sky coal seam 1 and the thickness 27.9m of interlayer rock stratum, No. 8 coal seams 2;Pedal sky coal seam 1 Upward mining meet described in quantitative identification method can Adopt situation.To sum up, tool post formula residual exploiting field, No. 8 coal seams 36502, Bai Jiazhuan colliery overlying pedals sky coal seam 1 Upward mining is feasible.

Step 2, knows according to original geology, technical data, tool post formula residual exploiting field, No. 8 coal seams 36502, Bai Jiazhuan colliery coal column 3 groups and The width of 4 groups, dead zone, tool post formula residual exploiting field is respectively 5m 15m and 15 40m, is highly 3.8m;Use 3 D laser scanning Distribution orientation, size and the volume of 4 groups, 36502 dead zone, 3 groups of exploiting fields residual with tool post formula of tool post formula residual exploiting field coal column precisely reconnoitred by instrument, paints The distributional pattern figure making 4 groups, dead zone, 3 groups of exploiting fields residual with tool post formula of coal column, tool post formula residual exploiting field, No. 8 coal seams 36502 pedals sky coal seam to instruct The safe second mining of 1 coal resources.

Step 3, starts above driving at end, the tool post formula residual exploiting field coal column that step 2 is detected and pedals the stope drift active workings in sky coal seam 1, cloth Put and pedal sky working face of coal seam 5.

Step 4, uses casing drilling technology (creep into while setting of casing) to hole from top to bottom pedaling sky working face of coal seam 5 base plate, Bore dia d is 80mm, pitch of holes l is 12m, hole tiltangleθ is 30 °, drilling depth h is 30 36m, arranges that post is other double Whole fill line road, side 6.

Step 5, is gangue/discarded concrete according to mass percent: flyash: cement: water reducer: water=50%:15%: The ratio of 15%:5%:15%, compound concentration is the fill paste of 80%, and its amount of preparation is explored No. 8 coal seams found out by step 2 Distributed dimension and the volume in 36502 each dead zone, the residual exploiting fields of tool post formula determine.

Step 6, under the effect of filling pump, the other bilateral whole fill line road 6 of post arranged along step 4 will be made in step 5 The mastic got ready is uniformly injected into be pedaled sky coal seam 1 and underlies in dead zone so that it is diffusion is enriched, to tool post formula residual exploiting field, No. 8 coal seams 36502 end Portion's coal column produces side and protects effect.

Step 7, advances and pedals sky working face of coal seam 5 (advance distance is 20 25m), and line to be exploited is advanced into next tool post formula Before boundary line, dead zone 4, residual exploiting field during 5m, stop propelling and pedal sky working face of coal seam 5.

Step 8, repeats step 4, five, six and the construction technology of seven, uses the mode side successively of the other whole filling of bilateral of post to protect 8 Number tool post formula residual exploiting field, coal seam 36502 coal column 3 groups, and gradually sky coal seam 1 coal resources are pedaled in extraction.

The above is the preferred embodiment of the present invention, it is noted that without departing from technical spirit of the present invention and principle Any improvement under premise, above-mentioned implementation made with polish, belong to the protection domain of technical solution of the present invention.

Claims (9)

1. the method that the other bilateral up second mining of whole filling of post pedals sky coal seam, it is characterised in that comprise the following steps:
(1) differentiate that tool post formula residual exploiting field overlying pedals the feasibility of sky coal seam Upward mining;
(2) combining the original geology of mine, technical data, exploration finds out that pedaling sky coal seam underlies tool post formula residual exploiting field coal column group and dead zone The distribution situation of group, draws the distributional pattern figure of tool post formula residual exploiting field coal column group and dead zone group to instruct safety in production;
(3) driving pedals the stope drift active workings in sky coal seam, arranges and pedals sky working face of coal seam;
(4) hole from top to bottom pedaling sky working face of coal seam base plate, arrange the conveying pipe of dead zone, tool post formula residual exploiting field group's paste body filling Road;
(5) preparation fill paste, under the effect of filling pump, the mastic prepared uniformly is noted by the transfer pipeline along step (4) Enter in dead zone, end, tool post formula residual exploiting field so that it is end, setting and hardening exploiting field residual to tool post formula coal column produces side and protects effect;
(6) sky working face of coal seam is pedaled in propelling, in time exploiting 3-8m before line is advanced into next boundary line, dead zone, tool post formula residual exploiting field, Stop propulsioning face;
(7) repeat step (4), (5) and the construction technology of (6), use the mode side successively of the other whole filling of bilateral of post to protect Tool post formula residual exploiting field coal column group, and gradually sky coal resources are pedaled in extraction.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that institute The step (2) stated investigates thoroughly that by the investigation original geology of mine, technical data pedaling sky coal seam underlies tool post formula residual exploiting field dead zone group and coal The width of post group, highly, use three-dimensional laser scanner precisely detect the distribution orientation of tool post formula residual exploiting field dead zone group, size and Volume.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that institute The step (3) stated end, the tool post formula residual exploiting field coal column that step (2) is detected arranged above pedal the stope drift active workings in sky coal seam with Work surface.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that institute The step (4) stated use casing drilling technology carry out drilling construction, bore dia d is 60-120mm, pitch of holes l is 5-20m, Bore inclining angle θ is 10 °-60 °, drilling depth h is determined by interlayer depth of stratum H and bore inclining angle θ.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that institute In the step (5) stated, fill paste is gangue/discarded concrete according to mass percent: flyash: cement: water reducer: The proportions of water=45%-55%:15%-20%:10%-15%:3%-5%:15%-25% forms, and its concentration is 75%-85%.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that institute Dividing of each dead zone, the residual exploiting field of tool post formula that in the step (5) stated, the amount of preparation of fill paste is found out according to described step (2) exploration Cloth size and volume of distribution determine.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that institute In the step (5) stated, the Stress control of filling pump is at 2-6MPa.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that institute The advance distance pedaling sky working face of coal seam in the step (6) stated is [(a+b) ± 5] m;Wherein, a is dead zone, tool post formula residual exploiting field Width, b is the width of tool post formula residual exploiting field coal column.
The method that the other bilateral up second mining of whole filling of post the most according to claim 1 pedals sky coal seam, it is characterised in that described The width c of the other bilateral obturator of step (7) center pillar equal to the width a of dead zone, tool post formula residual exploiting field.
CN201510116481.7A 2015-03-17 2015-03-17 The method that the other bilateral up second mining of whole filling of a kind of post pedals sky coal seam CN104832174B (en)

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CN105422099B (en) * 2015-12-11 2018-05-25 太原理工大学 A kind of bilateral method that all coal column is left in the residual exploiting field of filling second mining by column
CN105545309B (en) * 2015-12-11 2018-05-04 太原理工大学 A kind of method that coal column is left in filling second mining residual exploiting field in bilateral part by column
CN109339787B (en) * 2018-09-21 2020-02-07 太原理工大学 Reasonable layout method for middle-layer abandoned coal stoping roadway in composite caving type residual mining area

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RU2286457C1 (en) * 2005-05-18 2006-10-27 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (технический университет)" Pillar removal method
CN101109283B (en) * 2007-08-20 2013-04-03 太原理工大学 Quantitative decision method for feasibility of mining above hollow
CN101725352B (en) * 2009-12-04 2012-03-07 中国矿业大学 Method for filling solid and fully mechanizing and recovering room type coal pillar
CN102061938A (en) * 2010-12-10 2011-05-18 天地科技股份有限公司 Filling process for recovering coal pillars by filling goaf with paste
CN102562069B (en) * 2012-03-01 2016-08-10 肥城矿业集团有限责任公司 The fluid-filled replacement exploitation in coal seam method on high artesian body
CN104251139B (en) * 2013-06-26 2016-04-06 河南理工大学 Coal-face Collapsed zone filling mining method
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