CN103233740B - Top-cutting roadway coal-pillar-free mining method of close-range thin coal seam - Google Patents

Top-cutting roadway coal-pillar-free mining method of close-range thin coal seam Download PDF

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CN103233740B
CN103233740B CN201310141697.XA CN201310141697A CN103233740B CN 103233740 B CN103233740 B CN 103233740B CN 201310141697 A CN201310141697 A CN 201310141697A CN 103233740 B CN103233740 B CN 103233740B
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slip casting
described
constant
gate road
cutting
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CN201310141697.XA
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CN103233740A (en
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何满潮
孙晓明
杨晓杰
张国锋
赵术江
李东发
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中国矿业大学(北京)
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Abstract

The invention discloses a top-cutting roadway coal-pillar-free mining method of a close-range thin coal seam. The method comprises the following steps of: (1), excavating an upper crossheading roadway and a lower crossheading roadway; (2), mounting a grouting constant-resistance anchor rope and a grouting constant-resistance anchor rod without grouting at first, and a monomer hydraulic pillar, machining energy-accumulation presplitting top-cutting holes, and blasting to obtain presplitting cutting joints; (3), extracting an upper coal seam till unavailable; (4), allowing a mining field ejection plate to collapse along the shallow energy-accumulation presplitting cutting joints; (5), spraying a concrete spray layer to the rise side wall of the lower crossheading roadway, and grouting the grouting constant-resistance anchor rope and the grouting constant-resistance anchor rod; (6), extracting a lower coal seam till unavailable, and allowing the mining field ejection plate to collapse along the deep energy-accumulation presplitting cutting joints; (7), taking a roadway automatically formed at the original lower crossheading roadway as the upper crossheading roadway of a next mining surface; and (8), repeating steps (2) to (7). According to the method, by using the cutting joints formed by the energy-accumulation presplitting top-cutting holes for blasting the ejection plate, shallow breakage and deep breakage can be performed twice, and twice collapse of the mining field ejection plate is achieved.

Description

One closely girdle Qie Dingcheng lane without pillar mining method

Technical field

The present invention relates to a kind of exploitation method of coal seam, especially with seam inclination between 0 ° ~ 10 °, seam mining thickness between 0.5m ~ 1.3m, adjacent two coal seam spacings between 1.0m ~ 5.0m and be that the seam mining method of the closely thin coal seam cluster coal wall under tight roof condition is relevant.

Background technology

At present, there are some closely girdles, its seam inclination is between 0 ° ~ 10 °, and seam mining thickness is between 0.5m ~ 1.3m, and adjacent two coal seam spacings are between 1.0m ~ 5.0m, and roof is tight roof.In order to improve fltting speed and High-efficient Production, to these closely girdle carry out combining and adopt the promotion and application obtaining a greater number in China, and obtain good economic technology benefit.Because girdle normally occurs with coal seam group, and spacing is less between adjacent coal bed, mutual mining influence is larger, therefore when coal seam back production, gob side entry will stand repeatedly to dig up mine the dynamic pressure effect of pressure, therefore gob side entry destroys serious, and the gob side entry that cannot realize when point blank multiple seam group exploits is safeguarded.The other left road way of building pack wall by laying bricks or stones in the lane of current employing can only realize the maintenance in tunnel when exploiting one deck coal seam, and distortion is comparatively large, can not realize roadway maintenance when multiple seam is closely exploited, and particularly shares a tunnel during two-layer seam mining.And adopt and stay coal pillar mining, affect disturbance due to repeatedly dynamic pressure, roadway maintenance is more difficult, and in order to avoid the impact of back production dynamic pressure, coal column Size of pillar just strengthens, and cause the wasting of resources, numerous imbalances is compared in digging.It is the other release effect of building pack wall by laying bricks or stones or staying coal column all fundamentally not realize top board in lane, current method can not solve very well and realize girdle closely mutil-coal seam mining time coal wall tight roof condition under without coal pillar mining, and reserved coal pillar can cause coal and gas prominent, the major disasters such as impulsion pressure, cause the huge injures and deaths of equipment damage and personnel, potential safety hazard is huge.

The maintenance that the present invention is directed to gob side entry during current girdle short range seam mining still can not realize the technical barrier without coal pillar mining, proposes new method.

Summary of the invention

For problems of the prior art, the object of this invention is to provide a kind of gob side entry stablize, be out of shape little, realize without coal pillar mining and closely girdle Qie Dingcheng lane with low cost, safety is high without pillar mining method.

For achieving the above object, technical scheme of the present invention is as follows:

One closely girdle Qie Dingcheng lane, without pillar mining method, comprises the steps:

(1) on coal seam, excavate two tunnels and adopt the upper gate road in face and lower gate road as head, described upper gate road and lower gate road two ends are interconnected respectively by other two tunnels;

(2) slip casting constant-resistance anchor cable is in place by the top board in described lower gate road, but refuse slip casting, and in the lower side side of described lower gate road, slip casting constant-resistance rockbolt installation is put in place, but refuse slip casting, apical pore is cut in the cumulative presplitting of then making a call to a two-layer coal seam of row shared along the top board in described lower gate road near the side that described head adopts face, and implement explosion formation presplitting joint-cutting, and adopting side, face erection monomer liquid compression leg near described head;

(3) back production is carried out, until adopt sky to the coal seam, upper strata that described head adopts face;

(4) Stope roof is caving along superficial part cumulative presplitting joint-cutting;

(5) to the upper side sidewall sprayed mortar spray-up of described lower gate road, and slip casting is implemented to described slip casting constant-resistance anchor cable and slip casting constant-resistance anchor pole;

(6) excavate new upper crossheading, and carry out back production to the lower floor coal seam that described head adopts face, until adopt sky, described lower floor seam roof is caving, and described Stope roof is caving along deep cumulative presplitting joint-cutting in company with described lower floor seam roof;

(7) the lower gate road of relatively gate road on this as the upper gate road of next production face, and is excavated in the tunnel automatically formed using former lower gate road position, forms new production face;

(8) repeating said steps (2)-(7), cut coal continuously, until this seam mining is complete.

Further, in described step (2), described cumulative presplitting is cut apical pore and is obliquely installed.

Further, the described concrete spray coating in described step (5) is 50mm thick C20 plain concrete spray-up.

Further, in described step (5), the two slurries slip casting of cement-sodium silicate is implemented to described slip casting constant-resistance anchor cable and slip casting constant-resistance anchor pole.

Further, in described step (7), also comprise and withdraw from described monomer liquid compression leg.

Beneficial effect of the present invention is, the present invention compared with prior art, cut by cumulative presplitting the roof blasting joint-cutting that apical pore formed in the present invention, the fracture in superficial part and deep can be carried out at twice, be caving for twice that realizes Stope roof, in addition also by slip casting constant-resistance anchor pole, slip casting constant-resistance anchor cable and monomer liquid compression leg are reinforced the lane inside ceiling panel in lower gate road and lower side side, thus avoid lower crossheading top board and destroyed, make former lower gate road position automatic lane forming, then the upper gate road being next production face with this tunnel continues next round exploitation, continuous print between every two production face, without pillar, gob side entry is stablized, be out of shape little, also coal and gas prominent can not be caused, the major disasters such as impulsion pressure, with low cost, safety is high.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Fig. 1 be one of the present invention closely girdle Qie Dingcheng lane without production face structure schematic top plan view in pillar mining method;

Fig. 2 is that one of the present invention closely looks sectional structure schematic diagram without production face master in pillar mining method in girdle Qie Dingcheng lane;

Fig. 3 be one of the present invention closely girdle Qie Dingcheng lane without structural representation after production face upper strata coal seam back production in pillar mining method;

Fig. 4 is that one of the present invention is closely caving rear structural representation without production face Stope roof in pillar mining method along superficial part cumulative presplitting joint-cutting in girdle Qie Dingcheng lane;

Fig. 5 be one of the present invention closely girdle Qie Dingcheng lane without structural representation after production face lower floor coal seam back production in pillar mining method;

Fig. 6 is that one of the present invention is closely caving rear structural representation without production face Stope roof in pillar mining method along deep cumulative presplitting joint-cutting in girdle Qie Dingcheng lane;

Fig. 7 be one of the present invention closely girdle Qie Dingcheng lane without slip casting constant-resistance anchor pole (rope) structural representation in pillar mining method.

Fig. 8 be one of the present invention closely girdle Qie Dingcheng lane without constant resistance and large deformation anchor rod structural representation in pillar mining method.

Detailed description of the invention

The exemplary embodiments embodying feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various changes in different embodiments, it neither departs from the scope of the present invention, and explanation wherein and accompanying drawing are the use when explain in itself, and is not used to limit the present invention.

The method mainly utilizes cumulative presplit blasting to cut out a seam along tunnel trend at lane inside ceiling panel in the reserved large section roadway that two-layer coal seam shares, and this sewer has certain inclination angle and the degree of depth.Its inclination angle is determined through theoretical numerical computations and similarity simulation experiment according to balkstone intensity, girdle mining height, and after the degree of depth must meet the back production of two-layer coal seam, top release function demand cut by top board, and the degree of depth also calculates through correlation analysis to be determined.In lane after joint-cutting, Ji Dui lane inside ceiling panel is implemented to implement the control devices such as the intensive hydraulic prop of shelves cash in side, slip casting constant-resistance long anchor pole Suo He lane, support lane inside ceiling panel, along with the back production of first floor thin seam working surface, Stope roof is under overburden pressure effect, be caving along superficial part joint-cutting, until filling adopts absolutely empty, realize the support to overlying rock, realize stable, and then reduce the pressure of lane inside ceiling panel, safeguard stability of the roadway.After first floor stoping low coal seam is complete, to tunnel carry out whitewashing process, then slip casting is carried out to the long anchor pole of slip casting constant-resistance, reinforce and recover first time adopt action with under roadway surrounding rock.After second layer stoping low coal seam, Stope roof is caving along deep joint-cutting generation secondary, and after Stope roof is caving, the extruding to roadway surrounding rock is pressed in the slow distortion reducing later stage top board, realizes the stable of lane inside ceiling panel.The detailed process of method of the present invention is as follows:

(1) the closely girdle Qie Dingcheng lane adopted in the present invention, without pillar mining method, first needs to form head and adopts face 1.As shown in Figure 1, the method that formation head adopts face 1 is identical with existing method, the edge of seam mining is established and exploits position first, this position adopts S100A pattern synthesis mechanized development machine excavate two parallel tunnels 2,3, two parallel tunnels 2,3 are communicated with by tunnel 4,5.Submarginal tunnel 2 is upper gate road, is lower gate road near the tunnel 3 of continuation production face 11.Each production face must form two tunnels, and upper gate road 2 is the tunnels for transport of materials, and lower gate road 3 is the tunnels for return air.

(2) as shown in Figure 2, the mounting of roof plate slip casting constant-resistance anchor cable 61 in lower gate road 3, the degree of depth of constant-resistance anchor cable 61 is L, is now only in place by slip casting constant-resistance anchor cable 61 and does not carry out slip casting.In addition, slip casting constant-resistance anchor pole 62 is installed at the non-coal seam place along the lower side side (side near continuing production face 11) in tunnel 3, is now only in place by slip casting constant-resistance anchor pole 62 and does not carry out slip casting.Apical pore 7 is cut in the cumulative presplitting of then making a call to a two-layer coal seam of row shared along the upper side side (adopting the side in face 1 near head) in tunnel 3, and implements explosion formation presplitting joint-cutting, and this cumulative presplitting is cut apical pore 7 and had inclination alpha and degree of depth L '.Inclination alpha is according to Stope roof rock strength, girdle mining height determining through theoretical numerical computations and similarity simulation experiment, after the degree of depth must meet the back production of two-layer coal seam, Stope roof cuts top release function demand, the degree of depth also calculates through correlation analysis to be determined, can carry out superficial fracture and deep fracture.

The concrete account form of inclination alpha is, according to various internal friction angle of rock θ (table look-up can obtain according to rock composition), obtains inclination alpha, α=π/4-θ; With this condition, can be convenient to realize repeatedly being caving of Stope roof.

The degree of depth L ' cutting apical pore 7 can calculate according to the degree of depth L of constant-resistance anchor cable 61, the upwards anchoring section that the degree of depth L of constant-resistance anchor cable 61 will have more at least 1.5 meters compared to the degree of depth L ' cutting apical pore 7, satisfy condition:

L '=(L-1.5 rice)/cos θ

Substitute into each condition respectively in production, just can draw application data.

Then adopting the upper side side erection monomer liquid compression leg 8 in face 1 near head, to support the lane inside ceiling panel in lower gate road 3.Monomer liquid compression leg 8 bottom is fixedly installed on lower gate road 3 bottom surface, and lane inside ceiling panel is leaned on by hydraulic coupling support top in top.

In the mutil-coal seam mining process of closely girdle, before Stope roof is caving, there will be the outstanding dew of certain top board, the load of outstanding dew top board is delivered in tunnel, the load of prop in tunnel can be increased, general anchor cable due to extensible distortion little, be difficult to adapt to the country rock large deformation that this pressure causes, very easily break, and due to mutil-coal seam mining, country rock is disturbance repeatedly, after primary excavation, primary excavation dynamic pressure can cause roadway surrounding rock to occur crack, Surrounding Rock Strength is reduced, need to carry out grouting and reinforcing to country rock before second working, occlude crack, recover Surrounding Rock Strength, therefore slip casting constant-resistance anchor cable 61 is adopted to reinforce in the present invention, the extendible advantage of large deformation high strength of slip casting constant-resistance anchor cable 61 is played during primary excavation, again can by the grouting device on it before second working, grouting and reinforcing is carried out to country rock.

As shown in Figure 8, constant resistance and large deformation anchor rod be design for buried heading specially aly can keep constant-resistance and keep elongation and continuous anchor pole by mechanical slip device under the effect of buried heading immense pressure.Constant resistance and large deformation anchor rod comprises nut 601, ball pad 602, pallet 603, permanent resistance install 604, adapter sleeve 605 and the body of rod 606, permanent resistance install 604 is in tubular structure, be set in the afterbody of the body of rod 606, pallet 603 and nut 601 are sleeved on the afterbody of permanent resistance install 604 successively, wherein the mid portion of pallet 603 is provided with a hole and passes for permanent resistance install 604, nut 601 is threadedly connected to permanent resistance install 604, install the ball pad 602 of buffering between nut 601 and pallet 603, adapter sleeve is arranged on permanent resistance install 604 other end.

When constant resistance and large deformation anchor rod is applied in heading, when the deformation energy of roadway surrounding rock exceeds the scope that anchor pole can bear, produce relative displacement by the permanent resistance install 604 and anchor rod body 606 that its bonding surface are provided with helicitic texture, also namely this anchor pole shows as the large deformation of radial drawing along with country rock large deformation.After country rock generation large deformation, its energy is discharged, and constant resistance and large deformation anchor rod still can keep constant working resistance after the stretch, the deformation energy of country rock is less than the constant operation resistance of constant resistance and large deformation anchor rod, permanent resistance install 604 restore to the original state and being sleeved on the body of rod 606 tightly time, tunnel will be in stable state again, achieve the stable of tunnel, eliminate the potential safety hazards such as roof fall impact.Constant resistance and large deformation anchor rod bearing capacity 15 ~ 20KN, elongation all can reach 300 ~ 600mm, has larger deformability to adapt to the large deformation ability of gob side entry.

When constant resistance and large deformation anchor rod is applied in heading, because constant resistance and large deformation anchor rod itself has very large extensibility, so very large pretightning force can be born, by the triaxiality loss that pretightning force compensation roadway excavation causes, realize roadway surrounding rock fast and stablize, and common bolt is due to the anchor pole that can stretch when applying high pretightning force, consume the elongation of anchor pole, and itself elongation is very little, under the immense pressure effect of tunnel, elongation will be caused not enough and disrumpent feelings.Constant resistance and large deformation anchor rod is owing to there being the elongation of 500mm, and elongation is sufficient, even if stretch at high pretightening force and under Tunnel Pressure double action, still can not rupture, plays support action.

Slip casting constant-resistance anchor pole 62 is a kind of novel anchor rods being different from slip casting constant-resistance anchor cable 61, slip casting constant-resistance anchor pole 62 and slip casting constant-resistance anchor cable 61 are distinguished and are bar (rope) body 606, structure as shown in Figure 7, the cable body of slip casting constant-resistance anchor cable 61 is the Mine anchorage cable steel strand of φ 15.24mm, and the body of rod 606 of slip casting constant-resistance anchor pole 62 indulges muscle threaded steel pipe for left-handed high-strength nothing.The part identical with common constant resistance and large deformation anchor rod (rope) is no longer introduced, only to slip casting constant-resistance anchor pole (rope) 62(61) difference make an explanation: as shown in Figure 7, stop grouting plug 607 prevents high-pressure slip-casting slurries to run off after completing for slip casting, the expansile material of this stop grouting plug 607 is made, expand after meeting water and be full of grouting port, play grouting effect; Rubber pad 608 is the compressible rubber pad containing pore of an anti-extrusion under pallet 603, and Main Function prevents slurries from leaking along the gap between pallet 603 and rock wall; Hole 609 is the boring of diameter 5mm, facilitates injecting paste material to enter slip casting constant-resistance anchor pole (rope) 62(61 along hole 609) and jewel hole between hole, and under the effect of the pressure, compress into the minute fissure of country rock, play the effect of reinforce adjoining rock.

Slip casting constant-resistance anchor pole (rope) 62(61) by slip casting effect, reinforce side on lane inside ceiling panel and lower gate road 3 and be caving loose spoil, by slurries, it is cementing, form an entirety, like this under the slow crimp effect of later stage lane inside ceiling panel, can not crush because of pressure effect and be scattering in tunnel, play the effect in stable tunnel.

(3) as shown in Figure 3, back production is carried out in the coal seam, upper strata of head being adopted to face 1, until adopt sky, and the now first outstanding dew of top board adopting face 1.

(4) as shown in Figure 4, along with coal seam back production is constantly pushed ahead, the Stope roof area of suspension roof that head adopts on face 1 strengthens, when pressure continues to be increased to certain value, namely Stope roof is caving along superficial part cumulative presplitting joint-cutting (namely the face that apical pore 7 is formed compared with shallow portion is cut in row's cumulative presplitting), and be blocked in outside monomer liquid compression leg 8, after being finally full of goaf, stop pressure manifestation.

(5) 50mm thick C20 plain concrete spray-up is sprayed to the upper side sidewall of lower gate road 3, close country rock surface, and the two slurries slip casting of cement-sodium silicate is implemented to the slip casting constant-resistance anchor pole 62 of the slip casting constant-resistance anchor cable 61 on the inside ceiling panel of lane and lower side side, country rock is reinforced and intensity recovery, until after grouting pressure reaches 2MPa, stop slip casting.

(6) head as shown in Figure 5, inside gate road 2 on former adopts in face and again excavates a tunnel 21, as new upper crossheading, and be communicated with tunnel 4,5, then back production is carried out to the lower floor coal seam that head adopts face 1, until adopt sky, the now outstanding dew of Shou Caimian 1 lower floor seam roof.After lower floor's coal seam back production, Shou Caimian 1 lower floor seam roof is unsettled, pressure above makes Cai Mian 1 lower floor seam roof be caving, and Stope roof then along deep cumulative presplitting joint-cutting (namely arrange cumulative presplitting cut apical pore 7 and divide the face of formation compared with deep), secondary occurs together in company with Shou Caimian 1 lower floor seam roof and is caving.Be blocked in outside monomer liquid compression leg 8 being caving thing, and after being finally full of the goaf in Shou Caimian 1 lower floor coal seam, stop pressure manifestation, as shown in Figure 6.

(7) after the head Stope roof adopted on face 1 has all been caving, monomer liquid compression leg 8 is withdrawn from.Remained by lower crossheading 3 by acting on above, the upper crossheading as next work plane 11 uses, and avoids reserved coal pillar and save again digging the upper crossheading of a tunnel as next work plane 11.Automatically the lower gate road of relatively gate road on this as the upper gate road of next production face 11, and is excavated in the tunnel formed using former lower gate road 3 position again, forms new production face.

(8) repeat above-mentioned steps (2)-(7), cut coal continuously, until this seam mining is complete.

After implementing the method, owing to having carried out explosion joint-cutting to top board, therefore top board is in pre-breaking state, when after the effect of Stope roof pressure, just there is cut-out along pre-faulted joint place and be caving in top board, thus the top board that formed of the top board avoiding pre-fracture is outstanding shows up long-pending large, cause the harm large to prop active force in tunnel.After pressure reduction, the stressed reduction of support in mine gateway body, in lane, rock is able to complete reservation, and it is good that tunnel uses section to safeguard, ensure that the safety that the later stage uses.

Owing to implementing the exploitation method not staying coal column, tunnel is other is no longer provided with coal column, therefore avoids the coal and gas prominent harm that reserved coal pillar brings, substantially increases the safety of the environment of coal miner downhole operations.Avoid the wasting of resources staying coal column to bring simultaneously, saved resource, achieve economy, safety, exploit efficiently.

Below to further illustrate embodiments of the present invention in the example that is applied as of river mouth ore deposit 0245 work plane reaching bamboo business office subordinate:

This work plane seam inclination 0 ~ 8 degree, long 164 meters of work plane tendency, move towards long 1050 meters, buried depth 600 meters, belong to Upper Triassic Xujiahe Formation coal, first floor coal mining height 0.6 meter, second layer coal mining height 0.8m, work plane immediate roof is 1.2-2.0 rice medium hardness argillaceous sandstone, and immediate roof top is 5 ~ 7 meters of thick sand shale compositions, adopt longwell retrusive fully-mechanized mining, top board adopts caving method management.Wherein long 1050 meters of machine lane, special-shaped pre-allowance big cross section, lane is high 2.5 meters, lanewidth 4.4 meters.At duration of test, work plane twice back production 1000 meters, experience repeatedly ore deposit pressure manifest after, be accumulated into 250 meters, lane, machine lane goaf side top board major part cuts completion lane along CUMULATIVE BLASTING precracking with agglomerate body, lanewidth is all at 2.8 meters, and through field observation, lane side cuts spoil and is full of lane side and realizes within the scope of 60 meters connecing top after adopting, tend towards stability gradually in tunnel, occur outside the wall caving of 20cm becoming the Zhong Chubang side, 1000 meters of tunnels in lane, top board and base plate convergent deformation average 32cm, with roadside support uniform force in lane, constant-resistance anchor cable maximum weighted value 12.8t, reach the test objective of expection.

Beneficial effect of the present invention is, the present invention compared with prior art, cut by cumulative presplitting the roof blasting joint-cutting that apical pore 7 formed in the present invention, the fracture in superficial part and deep can be carried out at twice, be caving for twice that realizes Stope roof, in addition also by slip casting constant-resistance anchor pole 62, slip casting constant-resistance anchor cable 61 and monomer liquid compression leg 8 are reinforced the lane inside ceiling panel in lower gate road 3 and lower side side, thus avoid lower crossheading 3 top board and destroyed, make former lower gate road position automatic lane forming, then the upper gate road being next production face with this tunnel continues next round exploitation, continuous print between every two production face, without pillar, gob side entry is stablized, be out of shape little, also coal and gas prominent can not be caused, the major disasters such as impulsion pressure, with low cost, safety is high.

Technical scheme of the present invention is disclosed as above by preferred embodiment.The change that those skilled in the art do when should recognize the scope and spirit of the present invention disclosed in the claim do not departed from appended by the present invention and retouching, within the protection domain all belonging to claim of the present invention.

Claims (4)

1. closely girdle Qie Dingcheng lane, without a pillar mining method, is characterized in that, comprises the steps:
(1) on coal seam, excavate two tunnels and adopt the upper gate road in face and lower gate road as head, described upper gate road and lower gate road two ends are interconnected respectively by other two tunnels;
(2) slip casting constant-resistance anchor cable is in place by the top board in described lower gate road, but refuse slip casting, and in the lower side side of described lower gate road, slip casting constant-resistance rockbolt installation is put in place, but refuse slip casting, then to make a call to a two-layer coal seam of row near the side that described head adopts face along the top board in described lower gate road to share the cumulative presplitting be obliquely installed and cut apical pore, and implement explosion formation presplitting joint-cutting, and adopting side, face erection monomer liquid compression leg near described head;
(3) back production is carried out, until adopt sky to the coal seam, upper strata that described head adopts face;
(4) Stope roof is caving along superficial part cumulative presplitting joint-cutting;
(5) to the upper side sidewall sprayed mortar spray-up of described lower gate road, and slip casting is implemented to described slip casting constant-resistance anchor cable and slip casting constant-resistance anchor pole;
(6) excavate new upper crossheading, and carry out back production to the lower floor coal seam that described head adopts face, until adopt sky, described lower floor seam roof is caving, and described Stope roof is caving along deep cumulative presplitting joint-cutting in company with described lower floor seam roof;
(7) the lower gate road of relatively gate road on this as the upper gate road of next production face, and is excavated in the tunnel automatically formed using former lower gate road position, forms new production face;
(8) repeating said steps (2)-(7), cut coal continuously, until this seam mining is complete.
2. closely girdle Qie Dingcheng lane as claimed in claim 1, without pillar mining method, is characterized in that, the described concrete spray coating in described step (5) is 50mm thick C20 plain concrete spray-up.
3. closely girdle Qie Dingcheng lane as claimed in claim 1, without pillar mining method, is characterized in that, in described step (5), implements the two slurries slip casting of cement-sodium silicate to described slip casting constant-resistance anchor cable and slip casting constant-resistance anchor pole.
4. closely girdle Qie Dingcheng lane as claimed in claim 1, without pillar mining method, is characterized in that, in described step (7), also comprises and withdraws from described monomer liquid compression leg.
CN201310141697.XA 2013-04-22 2013-04-22 Top-cutting roadway coal-pillar-free mining method of close-range thin coal seam CN103233740B (en)

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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103670466B (en) * 2013-11-28 2016-04-13 尤洛卡(山东)深部地压防治安全技术有限公司 A kind of constant-resistance deformer and using method thereof
CN104179505B (en) * 2014-02-12 2016-01-20 云南磷化集团有限公司 A kind of underground mining method of phosphorus ore
CN105089668A (en) * 2014-05-19 2015-11-25 梁捷 Longwall working face coal-pillar-free mining method
CN104564072B (en) * 2015-01-14 2017-01-18 中国矿业大学 Complete non-coal-pillar continuous depressurized mining method for close-distance coal seam groups
CN105178962A (en) * 2015-06-24 2015-12-23 何满潮 Longwall mining method 110
CN105134216B (en) 2015-06-24 2017-12-15 何满潮 Anti- slump structure by the engineering method lane of breaking roof 110
CN105156116B (en) * 2015-08-28 2017-09-12 贵州盘江精煤股份有限公司 A kind of stope of coal mines tunnel design and construction method
CN105370281A (en) * 2015-10-10 2016-03-02 天地科技股份有限公司 Layout method for lower slice of close distance coal seam group and low layer structure
CN105275487B (en) * 2015-10-27 2017-07-18 何满潮 Long-wall mining N00 engineering method ventilating systems
CN108678769B (en) * 2018-05-16 2020-03-06 山东科技大学 Anchor grouting and roof cutting main control entry retaining method for deep mining tunnel
CN109139014B (en) * 2018-10-29 2020-03-10 六盘水师范学院 Perforation presplitting roof cutting gob-side entry retaining method
CN109826628A (en) * 2019-01-18 2019-05-31 山东科技大学 Presplitting arching without pillar mining method under the conditions of a kind of tight roof
CN110374600A (en) * 2019-07-29 2019-10-25 中国矿业大学(北京) A kind of ultra close distance coal seam group stope drift active workings are error-free away from formula method for arranging

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100562646C (en) * 2007-11-30 2009-11-25 西安科技大学 Large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined
CN101737056B (en) * 2009-12-01 2011-08-10 中国矿业大学(北京) Deep stope automatic lane forming method
CN102536239B (en) * 2012-01-06 2014-03-26 何满潮 Long-wall working face coal pillar-free mining method
CN102966354B (en) * 2012-11-09 2014-12-17 中国矿业大学(北京) Non-pillar mining method for hard roof coal wall of thick coal seam

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