CN102839984A - Oversized-section underground supporting structure - Google Patents
Oversized-section underground supporting structure Download PDFInfo
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- CN102839984A CN102839984A CN201210317918XA CN201210317918A CN102839984A CN 102839984 A CN102839984 A CN 102839984A CN 201210317918X A CN201210317918X A CN 201210317918XA CN 201210317918 A CN201210317918 A CN 201210317918A CN 102839984 A CN102839984 A CN 102839984A
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Abstract
The invention relates to the technology of underground supporting of a coal mine, in particular to an oversized-section underground supporting structure, which solves the oversized-section supporting problems generating under special production conditions. The oversized-section underground supporting structure comprises roof supporting (1) and roadside supporting (2). In the roof supporting, a spare rack port is reinforced on the basis of supporting a single anchor bolt of the original track lane, and the construction of roadside expansion and bottom lifting can be carried out, each row is additionally provided with three anchor bolts, one row of single anchor cables is punched between every two rows of anchor bolts, three rows of single hydraulic props are adopted at the middle part in order to assist and strengthen the supporting, and the distance among the rows is 1.5 meter. In the roadside supporting, the supporting of the single anchor bolts is adopted, shoulder anchor bolts and floor anchor rods form an 20-degree angle with the level, the other anchor bolts are all perpendicular to the sides, the distance among the rows is 1.5 meter, the pre-tightening moment is larger than 300N.M, the anchoring force is larger than 150KN, and the distance is 700mm. The technical scheme of the oversized-section underground supporting structure provided by the invention has the advantages that an installation space for filling a template rack is provided within a special lane, from the aspect of the supporting intensity, the supporting structure is a supporting mode with the maximum supporting intensity in the existing coal road digging process, and from the aspect of the supporting effect, no phenomena, such as roof settling and the like happen in the installation process. Moreover, the technical scheme of the oversized-section underground supporting structure has the advantages of high safety factor and simpleness in construction.
Description
Technical field
The present invention relates to support technology under a kind of coal mine, be specially a kind of down-hole large section supporting and protection structure.
Background technology
In coal mining, the span length of ordinary production generally is no more than 4 meters, takes general supporting measure to be effective.Along with the scale of coal in China exploitation is increasing; The device category that the extraction technique progress is used is more and more advanced, and volume is increasing, and the section in tunnel also requires increasing; Supporting in the well-known underground mining is the basis that the colliery routine safety is produced, and is the most important thing of all working.How when satisfying ventilation, transportation, pedestrian, overhaul of the equipments and installation needs, guarantee its supporting intensity, guarantee construction safety.In theory, section is wide more, and the influence that receives geostatic stress is big more, and distortion is just obvious more, and the danger of collapsing is also high more.The increase of drift section has brought huge difficulty to roadway maintenance, has had a strong impact on the safety of coal mines High-efficient Production.
About the large section support theory, many pieces of technical schemes have been arranged, but mostly concentrated in the tunnel scope that is no more than 7 meters.Under the complex geological conditions of down-hole, the width that every increase is a meter all can bring the great variety of geostatic stress, in order to guarantee coal mine production safety, must carry out detailed research to the variation of geostatic stress, takes the safest supporting means.
Meaning as shown in Figure 4, ten No. five coal 154307 fully-mechanized mining workings in certain ore deposit adopt gob side entry retaining to arrange, can realize not having coal pillar mining, reduce the tunnelling rate; Gob side entry retaining adopts three filling template supports, is mounting bracket, need open a support and be equipped with oral region 7; Form long * wide * high=large section of 20 * 10 * 2.9 meters at last, i.e. x among the figure, y; M, 4 institutes of n area surrounded can satisfy the installation requirements of filling template support; To how supporting of large section, become one pendulum difficult problem at full ore deposit technical elements.In the existing literature data, also do not see research about 10 meters and above width roadway support.
Summary of the invention
The present invention provides a kind of down-hole large section supporting and protection structure in order to solve the supporting problem of the large section that under the certain production condition, occurs.
Technical scheme of the present invention is, a kind of down-hole large section supporting and protection structure, and its position is the intersection that work plane is cut eye, sluicing lane, track lane; 4.6 meters of track lanewidths; Work plane is cut eye and sluicing lane beam overall is 10 meters, and it is wide 5.4 meters that support is equipped with mouth, long 10 meters; The rectangular cross section that forms is meter wide * 2.9,20 meters long * 10 meter high large sections
The supporting and protection structure of this section is (1) roof timbering: on the monomer bolt support basis in original track lane, support is equipped with mouth carries out reinforcement; Open again and helped the bottom application worker; Every row increases 3 anchor poles newly, and it is vertical with top board that the anchor pole of top board is installed angle, and array pitch is 1.5 meters; Pre-fastening moment is greater than 300NM, and anchored force is greater than 150KN; Beat between per two row's anchor poles and annotate row's monomer anchor cable, every row's 5 covers, 2 meters of anchor cable spacings, 1.5 meters of array pitch, the anchor cable protruded length is not more than 300 ㎜, and pretightning force reaches more than the 100KN.
Adopt three row's hydraulic props to assist at the middle part and add strong supporting, 1.5 meters of array pitch;
(2) roadside support: adopt the bolt support of monomer lane group, remove fillet, the base angle anchor pole becomes 20 to be outside one's consideration with level, all the other are all vertical in portion of group, and array pitch is 1.5 meters, and pre-fastening moment is greater than 300NM, and anchored force is greater than 150KN, spacing 700mm.
The beneficial effect of large section support technology scheme according to the invention is: in specific tunnel, for the installation of filling template support provides installing space, saying from supporting intensity, is the maximum support pattern of supporting intensity in the present coal road tunneling process; Say from supporting effect, phenomenon such as find in the installation process to crush, the real pick back of realizing is subzero heavy; From being installed, effect says that installation process is simple to operation; Say installation process safety zero defects from safety in production; Say from the supporting section, realize for the first time 20 * 10 * 2.9 meters section supportings, for the effective support of bigger section in the future provides valuable reference; Say that from technology content this cover support theory is reasonable in design, supporting intensity is big, and safety factor is high, easy construction; For a new situation has been opened in the smooth back production of my ore deposit 154307 fully-mechanized mining workings.
Before the exploitation, the rock stratum is in virgin state of stress, except that gravitational stresses, also has tectonic stress, thermal stresses and swelling stress etc., is in metastable state.After adopting, original stable stress state is destroyed, and each several part stress will redistribute; Wherein top board and each rock stratum will be supported under the effect of deadweight because of losing, bending subsidence, and the result tensile stress occurs in its bottom; When tensile stress goes beyond the limit, top board is promptly destroyed.Since support is equipped with a mouthful place excavate after, do not have the support of coal body, roof strata loses support, directly withstands on cutting under the drag effect of top that deadweight and prop produce, disrumpent feelings along the coal body edge, disrumpent feelings direct top is the semi girder state on the rank of falling from power.Supporting only need keep the directly complete sum on top and being close to of old top in the lane; Can not change the roof strata transitional period when movable size, lane inner support and the roadside support of the amount of crushing can not to retrain the roof strata later stage movable and translation that cause is sunk, the size of supporting resistance is to the translation of the later stage movable panel not influence of sinking.That is to say that translation sinks to having " given deformation " characteristics, supporting this moment load depends on the size of supporting effective rigidity fully.Effective rigidity is big more, and load is also big more, and this rule is called " propping up overloading firmly " rule.Another key character that translation is sunk is: generally do not destroy the stability of the balanced structure that forms early stage, and can make the rock stratum along the inner boundary of balanced structure to lane space " contraction ", that is to say that the scope of rock stratum self balanced structure has strengthened.When if roof strata is more complete, the interior critical surface of strata structure can " shrink " to the contoured surface of tunnel, and at this moment, roadway support is little to the influence of roadway surrounding rock stability of structure.Because this 15# zone coal top board is a K2 limestone, and its thickness reaches 9.01 meters, thereby takes to strengthen supporting intensity, earlier cap rock layer being connect is an integral body, adopts the suitable strong supporting that adds again, can satisfy the requirement that the filling support is installed to prevent that it from crushing.
Description of drawings
Fig. 1 is the roadway arrangement structural representation
Fig. 2 is the A-A sectional drawing of Fig. 1
Fig. 3 is the vertical view of Fig. 2
Fig. 4 is the roadside support structural representation
Among the figure: 1-sluicing lane, 2-work plane are cut eye, 3-caving drill site, 4-return air connection roadway, 5-winch cave, 6-track lane, 7-support mouth, 8,9,10,11,12 fully; The 13-anchor pole, 14,15,16,17; 18-anchor cable, 19,20,21-monomer column, 22,23,24-lane group anchor pole.
The specific embodiment
A kind of down-hole large section supporting and protection structure, meaning as shown in Figure 4, its position is the intersection that work plane is cut eye 2, sluicing lane 1, track lane 6, track lane 6 is wide 4.6 meters; It is 10 meters with sluicing lane 1 beam overall that work plane is cut eye 2, and it is wide 5.4 meters that support is equipped with mouth 7, and long 10 meters, the rectangular cross section of formation is meter wide * 2.9,20 meters long * 10 meter high large sections; Zone as shown in Figure 4 (x, y, m, n), the supporting and protection structure of this section are (1) roof timbering: on 6 monomer anchor poles, 8,9,10 supporting bases, original track lane; Support is equipped with mouth 7 carries out reinforcement, open and helped the bottom application worker, every row increases 3 anchor poles 11,12,13 newly; Anchor pole adopts ￠ 22-M24-2000 ㎜ high-strength deformed steel bar anchor pole, and anchorage style is the anchoring of resin lengthening, adopts two anchoring agent; A rule is K2335, and another specification is Z2360, bore diameter 28 ㎜; Anchorage length 1208 ㎜, pallet adopts supporting high strength arch pallet, and it is vertical with top board that roofbolt is installed angle; Array pitch is 1.5 meters, and pre-fastening moment is greater than 300NM, and anchored force is greater than 150KN; Beat between per two row's anchor poles and annotate row's monomer anchor cable, promptly between anchor pole 8,9,10,11,12,13 adjacent anchor poles, play anchor cable 14,15,16,17,18, every row's 5 covers, 2 meters of anchor cable spacings; 1.5 meters of array pitch, anchor cable cable body are the low loose steel strand of high strength, 6.3 meters of length, diameter 17.8 ㎜; Head is provided with the resin anchoring agent stirring-head, and afterbody is furnished with the high strength ground tackle, 6 meters of effective support length, and anchorage style is the end anchor; Adopt three anchoring agent, a rule is K2335, and two specifications are Z2360 in addition, bore diameter 28 ㎜; Anchorage length 1485 ㎜, the anchor cable protruded length is not more than 300 ㎜, and pretightning force reaches more than the 100KN.Adopt three row's hydraulic props 19,20,21 to assist at the middle part and add strong supporting, 1.5 meters of array pitch;
(2) roadside support: meaning as shown in Figure 3, adopt the monomer bolt support, lane group anchor pole 22,23,24 adopts ￠ 22-M24-2000 ㎜ high-strength deformed steel bar anchor pole, and anchorage style is the anchoring of resin lengthening; Adopt two anchoring agent, a rule is K2335, and another specification is Z2360; Bore diameter 28 ㎜, anchorage length 1208 ㎜, pallet adopts supporting high strength arch pallet; Except that fillet, base angle anchor pole become 20 to be outside one's consideration with level, all the other are all vertical in portion of group, and array pitch b is 1.5 meters; Pre-fastening moment is greater than 300NM, and anchored force is greater than 150KN, and spacing a is 700mm.
Claims (2)
1. down-hole large section supporting and protection structure, its position are the intersection that work plane is cut eye (2), sluicing lane (1), track lane (6), and track lane (6) are wide 4.6 meters; Work plane is cut eye (2) and sluicing lane (1) beam overall is 10 meters, and it is wide 5.4 meters that support is equipped with mouthful (7), long 10 meters; The rectangular cross section that forms is meter wide * 2.9,20 meters long * 10 meter high large sections, and it is characterized in that: the supporting and protection structure of this section is (1) roof timbering: on original track lane (6) monomer anchor pole (8,9,10) supporting basis; Support is equipped with mouthful (7) carries out reinforcement, open and helped the bottom application worker, every row increases 3 anchor poles (11,12,13) newly; It is vertical with top board that roofbolt is installed angle; Beat between per two row's anchor poles and annotate row's monomer anchor cable, promptly between the adjacent anchor pole of anchor pole (8,9,10,11,12,13), play anchor cable (14,15,16,17,18), every row's 5 covers; 2 meters of anchor cable spacings; 1.5 meters of array pitch adopt three row's hydraulic props (19,20,21) to assist at the middle part and add strong supporting, 1.5 meters of array pitch;
(2) roadside support: adopt the monomer bolt support; Lane group anchor pole (22,23,24) pallet adopts supporting arch pallet, and except that fillet, base angle anchor pole become 20 to be outside one's consideration with level, all the other are all vertical in portion of group; Array pitch b is 1.5 meters; Pre-fastening moment is greater than 300NM, and anchored force is greater than 150KN, and spacing a is 700mm.
2. down-hole according to claim 1 large section supporting and protection structure is characterized in that: the anchor pole at top adopts ￠ 22-M24-2000 ㎜ high-strength deformed steel bar anchor pole, and anchorage style is the anchoring of resin lengthening; Adopt two anchoring agent, a rule is K2335, and another specification is Z2360; Bore diameter 28 ㎜, anchorage length 1208 ㎜, pallet adopts supporting high strength arch pallet; Array pitch is 1.5 meters, and pre-fastening moment is greater than 300NM, and anchored force is greater than 150KN; The anchor cable cable body is the low loose steel strand of high strength, 6.3 meters of length, and diameter 17.8 ㎜, head is provided with the resin anchoring agent stirring-head; Afterbody is furnished with the high strength ground tackle, 6 meters of effective support length, and anchorage style adopts three anchoring agent for the end anchor; A rule is K2335, and two specifications are Z2360 in addition, bore diameter 28 ㎜; Anchorage length 1485 ㎜, the anchor cable protruded length is not more than 300 ㎜, and pretightning force reaches more than the 100KN; Lane group anchor pole adopts ￠ 22-M24-2000 ㎜ high-strength deformed steel bar anchor pole, and anchorage style is the anchoring of resin lengthening, adopts two anchoring agent, and a rule is K2335, and another specification is Z2360, bore diameter 28 ㎜, anchorage length 1208 ㎜.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104141503A (en) * | 2014-06-28 | 2014-11-12 | 四川省华蓥山煤业股份有限公司绿水洞煤矿 | Sharp inclination fully mechanized coal face open-off cut square supporting method |
| CN104153790A (en) * | 2014-07-29 | 2014-11-19 | 开滦（集团）有限责任公司林南仓矿业分公司 | Coalface cutting hole supporting structure and supporting method thereof |
| CN107654247A (en) * | 2017-09-22 | 2018-02-02 | 中国矿业大学 | A kind of sliding structure area pole loose thick coal layer coal roadway tunneling is met head on anti-top coal leakage method for leakage |
| CN108104821A (en) * | 2017-11-22 | 2018-06-01 | 平顶山天安煤业股份有限公司十矿 | Large section open*.off is constructed and its method for protecting support |
| CN108518234A (en) * | 2018-03-27 | 2018-09-11 | 中国矿业大学(北京) | A kind of wrong title formula anchor cable method for arranging of extra-large cross-section open-off cut Roof Control |
| CN108979687A (en) * | 2018-08-29 | 2018-12-11 | 北京圆之翰工程技术有限公司 | A kind of underground coal mine uses the advancing mining method of goaf top plate supporting |
| CN108979686A (en) * | 2018-08-29 | 2018-12-11 | 北京圆之翰工程技术有限公司 | A kind of support method for underground goaf roof of coal mine |
| CN110374645A (en) * | 2019-08-14 | 2019-10-25 | 缪协兴 | A kind of super high seam big cross section thin coal pillar gob side entry Equivalent Support method |
| CN113503179A (en) * | 2021-08-02 | 2021-10-15 | 太原理工大学 | Method for controlling large-section open-off cut tunneling surrounding rock of overlying goaf ultra-close coal seam |
| CN114718594A (en) * | 2021-11-10 | 2022-07-08 | 中国矿业大学 | Slow-inclination loose coal seam roadway roof and two-side anchoring structure and construction method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141503A (en) * | 2014-06-28 | 2014-11-12 | 四川省华蓥山煤业股份有限公司绿水洞煤矿 | Sharp inclination fully mechanized coal face open-off cut square supporting method |
| CN104153790A (en) * | 2014-07-29 | 2014-11-19 | 开滦（集团）有限责任公司林南仓矿业分公司 | Coalface cutting hole supporting structure and supporting method thereof |
| CN107654247A (en) * | 2017-09-22 | 2018-02-02 | 中国矿业大学 | A kind of sliding structure area pole loose thick coal layer coal roadway tunneling is met head on anti-top coal leakage method for leakage |
| CN108104821A (en) * | 2017-11-22 | 2018-06-01 | 平顶山天安煤业股份有限公司十矿 | Large section open*.off is constructed and its method for protecting support |
| CN108518234A (en) * | 2018-03-27 | 2018-09-11 | 中国矿业大学(北京) | A kind of wrong title formula anchor cable method for arranging of extra-large cross-section open-off cut Roof Control |
| CN108979687A (en) * | 2018-08-29 | 2018-12-11 | 北京圆之翰工程技术有限公司 | A kind of underground coal mine uses the advancing mining method of goaf top plate supporting |
| CN108979686A (en) * | 2018-08-29 | 2018-12-11 | 北京圆之翰工程技术有限公司 | A kind of support method for underground goaf roof of coal mine |
| CN108979686B (en) * | 2018-08-29 | 2020-01-03 | 北京圆之翰工程技术有限公司 | Method for supporting top plate of coal mine underground goaf |
| CN110374645A (en) * | 2019-08-14 | 2019-10-25 | 缪协兴 | A kind of super high seam big cross section thin coal pillar gob side entry Equivalent Support method |
| CN113503179A (en) * | 2021-08-02 | 2021-10-15 | 太原理工大学 | Method for controlling large-section open-off cut tunneling surrounding rock of overlying goaf ultra-close coal seam |
| CN114718594A (en) * | 2021-11-10 | 2022-07-08 | 中国矿业大学 | Slow-inclination loose coal seam roadway roof and two-side anchoring structure and construction method |
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