CN104500078A - Method for optimizing roadway area stress field in construction outside roadway - Google Patents
Method for optimizing roadway area stress field in construction outside roadway Download PDFInfo
- Publication number
- CN104500078A CN104500078A CN201410837427.7A CN201410837427A CN104500078A CN 104500078 A CN104500078 A CN 104500078A CN 201410837427 A CN201410837427 A CN 201410837427A CN 104500078 A CN104500078 A CN 104500078A
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- Prior art keywords
- stress
- roadway
- tunnel
- optimization
- boring
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Abstract
The invention discloses a method for optimizing a roadway area stress field in construction outside a roadway, and belongs to the technical field of roadway support. The method comprises the following steps of firstly excavating a relieving roadway at a proper location in the floor strata of a pre-excavated roadway, testing ground stress in a roadway communicated with the pre-excavated roadway, and finding the position with a maximum principal stress difference of roadway sides after roadway excavation through calculation and analysis; constructing multiple rows of stress optimization drill holes in the relieving roadway towards the position with the maximum principal stress difference, and implementing static blasting in the position of the maximum principal stress difference so as to optimize the roadway area stress field. By applying the method, a high stress roadway having no condition of a pressure relieving scheme for construction inside the roadway can be subjected to pressure relieving and roadway area stress field optimization; the method is simple, convenient to operate, good in application effect and bright in application prospect.
Description
Technical field
The present invention relates to the method for construction optimization tunnel regional stress field outside a kind of lane, before being particularly useful for deep-well, high-ground stress tunnelling, regional stress field optimization is carried out to tunnel, belong to Roadway Support Technology field.
Background technology
The distortion in tunnel is the inevitable phenomenon in coal production, tunnel is because of the difference of concrete occurrence condition, can produce and crush, two help to shift near the metaboly different with pucking etc., make drift section can not meet the demand of the activities in production such as ventilation, transport, pedestrian, haul.Especially, after coal mining enters deep mining, high stress tunnel is changed in tunnel into.Deep-well high stress tunnel shows that pressure is large, deflection is large and the feature such as rate of strain is fast, and especially horizontal stress is large, pucking deflection is large, and tunnel needs frequent overhauling could meet normal need of production.Practice shows, the tunnel revision rate of deep mining can reach 40%-80%, have even up to 100%.The effective support problem of deep-well, high stress tunnel brings huge puzzlement to the normal production in colliery.For above problem, Chinese scholars and colliery engineering technician propose many release Theories and methods, and have carried out repeatedly putting into practice, and comprise frame stiffens, boring release, grooving etc.But mostly these methods are to construct based in tunnel, delayed or be parallel to tunnelling, contradict with tunnelling, improve the labour intensity of workman, add working procedure, only can implement in the scope in the tunnel tunneled and several meters, driving face front, and effect limitation, deep-well tunnel distortion is still serious.When the occurrence condition of deep-well tunnel does not allow to construct in tunnel release scheme, but when just must carry out release before driving, namely said method does not have feasibility, so existing method can not be adopted to carry out release for such tunnel, need badly propose to construct outside a kind of lane, effective and feasible pressure relief method.
Summary of the invention
Technical problem: the object of the invention is not possess in this tunnel the condition of release scheme of constructing for part deep-well, high-ground stress tunnel and must carry out the problem of release before driving, provides a kind of drilling and blasting of constructing outside lane to optimize tunnel regional stress field method.
Technical scheme: the method for construction optimization tunnel regional stress field outside lane of the present invention, comprises the steps:
(1) in the tunnel be connected with pre-digging laneway, construction stress removes boring, stress relief method is utilized to survey geostatic stress, obtain the size and Orientation distribution of main stress bar, to calculate and after determining pre-digging laneway pick lane, major principal stress difference position and the relative distance c that helps of pre-tunnel laneway are helped in pre-tunnel laneway road two;
(2) in the backplane level position of pre-digging laneway, tunnel a relieving roadway in advance, and carry out supporting;
(3) help major principal stress difference position to arrange the position, hole that multiple row stress optimization is holed respectively from relieving roadway top board to pre-tunnel laneway road two;
(4) by arranging the boring of construction stress optimization one by one, and in Kong Di powder charge district's powder charge that each stress optimization is holed;
(5) static(al) explosion is carried out in counter stress optimization boring, optimizes tunnel regional stress field.
The horizontal range a of described relieving roadway and pre-digging laneway is 0 ~ 30m, vertical distance b is 5 ~ 40m.
The vertical distance e of described stress releasing borehole and pre-digging laneway is the pre-digging laneway span scope of 2 ~ 3 times.
The spacing f of adjacent two row of described multiple row stress optimization boring is 0.6 ~ 2m, the array pitch g of adjacent two rows is 0.6 ~ 1.2m, and length l, the stress optimization boring of stress optimization boring are determined by horizontal range a, vertical distance b, relative distance c with the angle α of vertical direction.
The loaded length d in described powder charge district is 1 ~ 3m.
Beneficial effect: the present invention in the tunnel be connected with pre-digging laneway by stress relief method side geostatic stress, obtain country rock intermediate principal stress size and the direction in region residing for pre-digging laneway, the major principal stress formed in roadway's sides after computation and analysis obtains Chu Jue lane difference position.In the layer position that the below of pre-digging laneway layer position is suitable, the relieving roadway that driving one is parallel with pre-digging laneway in advance, there is large distortion and even destroy completely after boring release completes in the supporting intensity permission tunnel of this Relieving way, plays certain release effect to pre-digging laneway.In the relieving roadway of base plate, help the boring of major principal stress difference position construction multiple row stress optimization respectively to the left and right two of pre-digging laneway, powder charge and static(al) unloading pressure by blasting are carried out to boring.May correspond to power optimization boring after powder charge adopts many rows to be divided into one group, and the mode of sequence blasting in units of group carries out release.After upper one group of stress optimization drilling and blasting has been constructed, circulation is carried out holing, powder charge, unloading pressure by blasting, complete and optimize in advance the tunnel regional stress field of pre-digging laneway total length, its method is simple, and easy to operate, implementation result is good.Major advantage has:
1. the driving of relieving roadway not only solves the problem of release scheme constructional difficulties in lane, and the distortion of relieving roadway also serves the effect of release to pre-digging laneway;
2. the construction of multiple row boring serves certain release effect to pre-digging laneway;
3. unloading pressure by blasting has been carried out in pair major principal stress difference position, and unloading pressure by blasting has order ground property and specific aim;
4. adopt the mode of order of packets explosion to carry out release during explosion, release effect is better;
5. adopt the mode of static(al) explosion to carry out unloading pressure by blasting, can not damage the roadway surrounding rock of superficial part.
Accompanying drawing explanation
Fig. 1 is the method schematic diagram of construction optimization tunnel regional stress field outside lane of the present invention;
Fig. 2 is stress releasing borehole schematic diagram in the method for construction optimization tunnel regional stress field outside lane of the present invention;
Fig. 3 is the layout schematic diagram of roof Stress optimization boring in the method for construction optimization tunnel regional stress field outside lane of the present invention.
In figure: the pre-digging laneway of 1-; 2-relieving roadway; 3-major principal stress difference position; 4-stress optimization is holed; 5-powder charge district; 6-tunnel; 7-stress releasing borehole.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
The method of construction optimization tunnel regional stress field outside lane of the present invention, concrete steps are as follows:
(1) test of geostatic stress, obtain major principal stress difference position: in the tunnel 6 be connected with pre-digging laneway 1, construction stress removes boring 7, as shown in Figure 2, stress relief method is utilized to survey geostatic stress, obtain the size and Orientation distribution of main stress bar, to calculate and after determining that pre-digging laneway 1 digs lane, the relative distance c that pre-tunnel laneway road two helps major principal stress difference position 3 and pre-tunnel laneway to help; Described stress releasing borehole 7 and the vertical distance e of pre-digging laneway 1 are the pre-digging laneway span scope of 2 ~ 3 times.
(2) relieving roadway is tunneled: in the backplane level position of pre-digging laneway 1, tunnel a relieving roadway 2 in advance, and carry out supporting; The intensity of supporting allows relieving roadway 2 to complete, and stress optimization boring is arranged, large deformation and failure occurs after explosion, plays release effect to pre-digging laneway.Described relieving roadway 2 is 0 ~ 30m, vertical distance b with the horizontal range a of pre-digging laneway 1 is 5 ~ 40m, as shown in Figure 1.
(3) stress optimization boring is arranged: help major principal stress difference position 3 to arrange the position, hole of multiple row stress optimization boring 4 respectively from relieving roadway 2 top board to pre-tunnel laneway road two; Borehole bottom location drops on major principal stress difference position 3 place; Length l, the stress optimization boring 4 of stress optimization boring 4 are determined by horizontal range a, vertical distance b, relative distance c with the angle α of vertical direction; Described multiple row stress optimization hole 4 adjacent two row spacing f be 0.6 ~ 2m, adjacent two row array pitch g be 0.6 ~ 1.2m, the diameter D of boring is more than 40mm.
(4) by arranging the boring of construction stress optimization one by one 4, and powder charge at the bottom of the hole of each stress optimization boring 4, the loaded length d in Kong Di powder charge district 5 is 1 ~ 3m.
(5) static(al) explosion is carried out in counter stress optimization boring 4, optimizes tunnel regional stress field.Can adopt during explosion and arrange grouping more, the mode of sequence blasting in units of group carries out unloading pressure by blasting, and for Fig. 3, every five row hole drillings are divided into a group, are numbered 1# ~ 5#; First explosion is carried out to 3# row hole drilling, after certain interval of time, then to the static(al) explosion simultaneously of 2#, 4# row hole drilling, then after a period of time of being separated by, then static(al) explosion is carried out to 1#, 5# row hole drilling simultaneously.
(6): repeat step (3), (4), (5): after a upper section drilling and blasting is complete, repeat boring, powder charge, explosion, until complete tunnel regional stress field optimization aim in whole audience region, tunnel.
Claims (5)
1. the method for construction optimization tunnel regional stress field outside lane, its spy is to comprise the steps:
(1) in the tunnel (6) be connected with pre-digging laneway (1), construction stress removes boring (7), stress relief method is utilized to survey geostatic stress, obtain the size and Orientation distribution of main stress bar, to calculate and after determining pre-digging laneway (1) pick lane, the relative distance that pre-tunnel laneway road two helps major principal stress difference position (3) to help with pre-tunnel laneway
c;
(2) in the backplane level position of pre-digging laneway (1), tunnel a relieving roadway (2) in advance, and carry out supporting;
(3) help major principal stress difference position (3) to arrange the position, hole of multiple row stress optimization boring (4) respectively from relieving roadway (2) top board to pre-tunnel laneway road two;
(4) by arranging the boring of construction stress optimization one by one (4), and Kong Di powder charge district (5) powder charge of hole at each stress optimization (4);
(5) static(al) explosion is carried out in counter stress optimization boring (4), optimizes tunnel regional stress field.
2. the method for construction optimization tunnel regional stress field outside lane according to claim 1, is characterized in that: the horizontal range of described relieving roadway (2) and pre-digging laneway (1)
abe 0 ~ 30m, vertical distance
bbe 5 ~ 40m.
3. the method for construction optimization tunnel regional stress field outside lane according to claim 1, is characterized in that: the vertical distance of described stress releasing borehole (7) and pre-digging laneway (1)
eit is the pre-digging laneway span scope of 2 ~ 3 times.
4. the method for construction optimization tunnel regional stress field outside lane according to claim 1, is characterized in that: the spacing of adjacent two row of described multiple row stress optimization boring (4)
fbe 0.6 ~ 2m, the array pitch of adjacent two rows
gbe 0.6 ~ 1.2m, the length of stress optimization boring (4)
l, stress optimization boring (4) and vertical direction angle
αpass through horizontal range
a, vertical distance
b, relative distance
cdetermine.
5. the method for construction optimization tunnel regional stress field outside lane according to claim 1, is characterized in that: the loaded length in described powder charge district (5)
dbe 1 ~ 3m.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837427.7A CN104500078B (en) | 2014-12-29 | 2014-12-29 | A kind of method of construction optimization tunnel regional stress field outside lane |
| PCT/CN2015/098034 WO2016107435A1 (en) | 2014-12-29 | 2015-12-21 | Method operating outside of passageway for optimizing passageway regional stress field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837427.7A CN104500078B (en) | 2014-12-29 | 2014-12-29 | A kind of method of construction optimization tunnel regional stress field outside lane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104500078A true CN104500078A (en) | 2015-04-08 |
| CN104500078B CN104500078B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410837427.7A Active CN104500078B (en) | 2014-12-29 | 2014-12-29 | A kind of method of construction optimization tunnel regional stress field outside lane |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104500078B (en) |
| WO (1) | WO2016107435A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016107435A1 (en) * | 2014-12-29 | 2016-07-07 | 中国矿业大学 | Method operating outside of passageway for optimizing passageway regional stress field |
| CN111578797A (en) * | 2020-07-06 | 2020-08-25 | 酒泉钢铁(集团)有限责任公司 | Underground medium-length hole blasting suspended roof processing method |
| CN112483097A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Mining roadway scour prevention method under three-dimensional coal pillar based on overhaul |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110704927B (en) * | 2019-09-29 | 2022-09-30 | 安徽理工大学 | Deep well roadway surrounding rock dynamic control method |
| CN115263318B (en) * | 2022-06-29 | 2023-09-19 | 中国矿业大学 | Combined pressure relief method for head-on explosion rupture hole of rock burst mine tunneling roadway |
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| DE3540995A1 (en) * | 1985-03-01 | 1986-09-04 | Markmann & Moll GmbH & Co KG, 4300 Essen | Injection and tube-releasing apparatus |
| GB2358417A (en) * | 2000-01-18 | 2001-07-25 | Allan Cassells Sharp | A method for construction and operation of subaqueous tunnels |
| CN101864961A (en) * | 2010-05-27 | 2010-10-20 | 武汉大学 | Method for actively preventing and controlling rock burst |
| CN102937399A (en) * | 2012-11-20 | 2013-02-20 | 武汉大学 | Stress relief blasting method based on ground stress transient release |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1180519A1 (en) * | 1984-04-03 | 1985-09-23 | Коммунарский горно-металлургический институт | Method of relieving and strengthening a rock body |
| SU1263868A1 (en) * | 1984-12-05 | 1986-10-15 | Коммунарский горно-металлургический институт | Method of controlling the strained state of rock about mine working |
| SU1643726A1 (en) * | 1988-06-13 | 1991-04-23 | Всесоюзный Научно-Исследовательский, Проектный И Конструкторский Институт Горного Дела Цветной Металлургии | Method for tunneling mine workings under high rock pressure |
| CN1865660A (en) * | 2006-06-16 | 2006-11-22 | 中国矿业大学 | Construction method for weakening zone of floor plate wall rock |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
| CN102518471A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Rock burst energy releasing method of roadway of high stress area in coal mine |
| CN104500078B (en) * | 2014-12-29 | 2016-08-17 | 中国矿业大学 | A kind of method of construction optimization tunnel regional stress field outside lane |
-
2014
- 2014-12-29 CN CN201410837427.7A patent/CN104500078B/en active Active
-
2015
- 2015-12-21 WO PCT/CN2015/098034 patent/WO2016107435A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3540995A1 (en) * | 1985-03-01 | 1986-09-04 | Markmann & Moll GmbH & Co KG, 4300 Essen | Injection and tube-releasing apparatus |
| GB2358417A (en) * | 2000-01-18 | 2001-07-25 | Allan Cassells Sharp | A method for construction and operation of subaqueous tunnels |
| CN101864961A (en) * | 2010-05-27 | 2010-10-20 | 武汉大学 | Method for actively preventing and controlling rock burst |
| CN102937399A (en) * | 2012-11-20 | 2013-02-20 | 武汉大学 | Stress relief blasting method based on ground stress transient release |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016107435A1 (en) * | 2014-12-29 | 2016-07-07 | 中国矿业大学 | Method operating outside of passageway for optimizing passageway regional stress field |
| CN111578797A (en) * | 2020-07-06 | 2020-08-25 | 酒泉钢铁(集团)有限责任公司 | Underground medium-length hole blasting suspended roof processing method |
| CN111578797B (en) * | 2020-07-06 | 2022-05-31 | 酒泉钢铁(集团)有限责任公司 | Underground medium-length hole blasting suspended roof processing method |
| CN112483097A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Mining roadway scour prevention method under three-dimensional coal pillar based on overhaul |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016107435A1 (en) | 2016-07-07 |
| CN104500078B (en) | 2016-08-17 |
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Address after: 221116 Research Institute of China University of Mining and Technology,, Jiangsu Applicant after: China University of Mining & Technology Address before: 221116 Research Institute, China University of Mining and Technology, Xuzhou University, Jiangsu, China, Applicant before: China University of Mining & Technology |
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Inventor after: Zheng Xigui Inventor after: Zhang Nong Inventor after: Fu Shixiong Inventor after: Yue Wei Inventor after: Liu Na Inventor after: Shi Chaomin Inventor before: Zhang Nong Inventor before: Zheng Xigui Inventor before: Fu Shixiong Inventor before: Yue Wei Inventor before: Liu Na Inventor before: Shi Chaomin |
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