WO2016107434A1 - Regional stress field optimization method for main haulageway - Google Patents
Regional stress field optimization method for main haulageway Download PDFInfo
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- WO2016107434A1 WO2016107434A1 PCT/CN2015/098030 CN2015098030W WO2016107434A1 WO 2016107434 A1 WO2016107434 A1 WO 2016107434A1 CN 2015098030 W CN2015098030 W CN 2015098030W WO 2016107434 A1 WO2016107434 A1 WO 2016107434A1
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- 238000005457 optimization Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005422 blasting Methods 0.000 claims abstract description 16
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 34
- 238000009412 basement excavation Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- the invention relates to a stress field optimization method for a large roadway region, and is particularly suitable for maintenance and treatment of a deep mine roadway, and belongs to the technical field of roadway support.
- the alley is the first roadway in the coal mine roadway system, which belongs to the pioneering roadway. It is responsible for all mines or several levels of coal transportation, transportation, ventilation, drainage, pedestrians, etc., and the service life is generally several decades. Therefore, the maintenance of the main road is an important part of coal mine production. After entering deep mining, due to the deepening of the mining depth, the ground stress of the main road is increased, especially the ground stress mainly caused by horizontal stress, which makes the deformation of the roadway intensified. The deep well roadway is not as easy to maintain as the shallow mine shaft. A long-term creep effect is exhibited.
- the object of the present invention is to solve the problem that the deep well roadway is severely deformed, and it is necessary to periodically expand the roadway section, and provide a method for controlling the deformation of the deep shaft and effectively optimizing the stress field of the roadway region.
- the method for optimizing the stress field in the roadway region of the present invention comprises the following steps:
- the pressure relief lane is located above or below the maximum principal stress difference position, and the horizontal distance a of the pressure relief lane and the roadway is 5-30 m, and the vertical distance b is 5-30 m.
- the spacing e and the row spacing f of the bottom plate stress optimized drilling are both 0.6 to 2 m, and the drilling length l 1 of the floor stress optimized drilling is determined by the distance between the pressure relief lane and the maximum principal stress difference position.
- the distance g and the row spacing h of the boring stress optimization drilling hole are both 0.6 to 2 m, and the length l 2 of the boring stress optimization drilling hole is determined by the relative distance c.
- the bottom plate stress optimization drilling and the rib stress optimization hole length d 1 and d 2 of the hole are 1 to 3 m.
- the present invention pre-tests the ground stress in the roadway connected in the vicinity of the main road, analyzes and calculates the principal stress to determine the position of the maximum main stress difference of the roadway after the roadway is driven. Select the appropriate upper and lower horizons of the level of the main road, above or below the maximum principal stress difference position, tunnel 2 to 4 pressure relief lanes, and carry out certain support, the support strength allows large deformation of the pressure relief lane.
- the pressure relief lane is arranged parallel to the main roadway, and multiple rows of vertical drilling holes are arranged from the pressure relief lane to the maximum principal stress difference position. The final hole position falls at the position of the maximum principal stress difference, and the pressure is discharged at the bottom of the hole.
- the length of the borehole is determined by the relative distance between the pressure relief lane and the position of the maximum principal stress difference.
- the deformation of the pressure relief lane is used to optimize the regional stress field of the pre-excavation into the main roadway.
- the pre-excavation pre-depressurization and the second precise pressure relief are carried out before and after the large roadway excavation, which can effectively optimize the large Lane area stress field.
- the construction of the pressure relief borehole has a certain pressure relief effect on the roadway
- FIG. 1 is a schematic view showing a method for optimizing a stress field in a roadway region according to the present invention
- FIG. 2 is a schematic view showing a stress-optimized drilling arrangement of a floor of a pressure relief roadway according to the present invention
- Fig. 3 is a schematic view showing the stress-optimized drilling arrangement of the roadway gang of the present invention.
- the pressure relief lane 2; the pressure relief lane 2 is located above or below the maximum principal stress difference position 3, the horizontal distance a of the pressure relief lane 2 and the main lane 1 is 5-30 m, and the vertical distance b is 5-30 m. As shown in Figure 1;
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- Geochemistry & Mineralogy (AREA)
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Abstract
Disclosed is a regional stress field optimization method for a main haulageway (1). First, before boring the main haulageway (1), measuring the crustal stress at passageways near and in communication with the main haulageway (1); calculating and analyzing the position of the greatest difference of principal stress (3) on the wall after the main haulageway (1) is bored; boring multiple pressure-relieving passageways (2) near the main haulageway (1) at appropriate layers above or below the position of the greatest difference of principal stress (3), and using the pressure-relieving passageways (2) to relieve the pressure of the main haulageway (1); constructing from the inside of the pressure-relieving passageways (2) floor stress optimization holes (4) toward the position of the greatest difference of principal stress (3), and performing static blasting; after the pressure-relieving passageways (2) deform to a certain degree, boring the main haulageway (1), and measuring, inside of the main haulageway (1), the crustal stress and calculating the position of the greatest difference of principal stress (3) on the wall; constructing from the inside of the main haulageway (1) a wall stress optimization hole (5) toward the position of the greatest difference of principal stress (3) on the wall, and performing static blasting to relieve pressure, thereby optimizing the regional stress field of the main haulageway (1). The present method relieves the pressure using pressure-relieving passageways and performs static blasting twice to relieve pressure, once before the boring and once after the boring, at the position of the greatest difference of principal stress on the wall, thereby optimizing the regional stress field of the main haulageway with good effects.
Description
本发明涉及一种大巷区域应力场优化方法，尤其适用于对深部矿井大巷进行维护和治理，属于巷道支护技术领域。The invention relates to a stress field optimization method for a large roadway region, and is particularly suitable for maintenance and treatment of a deep mine roadway, and belongs to the technical field of roadway support.
大巷是煤矿巷道系统中较先开始掘进的巷道，属于开拓巷道，担负着全矿井或数个水平运煤、运料、通风、排水、行人等任务，且服务年限一般长达数十年，所以大巷的维护是煤矿生产中的重要环节。进入深部开采以后，由于采深加大，大巷所受的地应力增大，尤其是以水平应力为主的地应力使巷道变形加剧，深井大巷不像浅部矿井大巷一样易于维护，显现出长时的蠕变效应。大巷在掘进支护后一段时间内断面收缩，支架不均匀受力变形，底鼓和帮部变形严重，喷浆层破裂等。大巷的变形和破坏严重的影响了巷道的正常使用，给煤矿的安全高产高效带来了巨大困扰。为了满足正常的生产，往往需要定期对大巷进行卧底、扩刷工作。不仅影响了正常的生产，而且又增加了工人数量，提高了吨煤成本，在部分深部矿井，一条大巷的翻修工作量甚至已经超过了重新掘进一条新大巷的工作量，大巷修复工作已经成为深部矿井正常生产的又一艰巨任务和挑战。因此，亟需提出一种有效的治理大巷变形的方法。The alley is the first roadway in the coal mine roadway system, which belongs to the pioneering roadway. It is responsible for all mines or several levels of coal transportation, transportation, ventilation, drainage, pedestrians, etc., and the service life is generally several decades. Therefore, the maintenance of the main road is an important part of coal mine production. After entering deep mining, due to the deepening of the mining depth, the ground stress of the main road is increased, especially the ground stress mainly caused by horizontal stress, which makes the deformation of the roadway intensified. The deep well roadway is not as easy to maintain as the shallow mine shaft. A long-term creep effect is exhibited. After a large amount of roadway, the section shrinks after a period of support, the bracket is unevenly deformed by force, the bottom drum and the gang are severely deformed, and the spray layer is broken. The deformation and damage of the main road seriously affect the normal use of the roadway, which brings great trouble to the safety, high productivity and high efficiency of the coal mine. In order to meet normal production, it is often necessary to carry out undercover and expansion work on the main road on a regular basis. Not only affected normal production, but also increased the number of workers and increased the cost per ton of coal. In some deep mines, the renovation work of a large alley has even exceeded the workload of re-entering a new alley, and the restoration of the main road. It has become another arduous task and challenge for the normal production of deep mines. Therefore, it is urgent to propose an effective method for controlling the deformation of the main road.
发明内容Summary of the invention
技术问题：本发明的目的是针对深井大巷变形严重，需要定期扩刷巷道断面的问题，提供一种可控制深井大巷变形，有效的优化巷道区域应力场的方法。Technical Problem: The object of the present invention is to solve the problem that the deep well roadway is severely deformed, and it is necessary to periodically expand the roadway section, and provide a method for controlling the deformation of the deep shaft and effectively optimizing the stress field of the roadway region.
技术方案：本发明的大巷区域应力场优化方法，包括如下步骤：Technical Solution: The method for optimizing the stress field in the roadway region of the present invention comprises the following steps:
(1)在大巷预掘之前，先在预掘的大巷附近相连通的巷道内测试地应力，得到主应力的大小和方向，计算和分析确定掘进前大巷两侧的最大主应力差位置，然后在预掘的大巷附近层位掘进多条卸压巷；(1) Before the pre-excavation of the main road, the ground stress is tested in the connected roadway near the pre-excavated main road, and the magnitude and direction of the principal stress are obtained. The maximum principal stress difference between the two sides of the main road before the excavation is determined and calculated. Position, and then dig a number of pressure relief lanes in the vicinity of the pre-drilled alley;
(2)从卸压巷底板向最大主应力差位置垂直施工底板应力优化钻孔，在底板应力优化钻孔孔底装药，实施静力爆破卸压；(2) Optimize the drilling of the bottom plate from the bottom plate of the pressure relief roadway to the position of the maximum principal stress difference, optimize the drilling of the bottom hole under the stress of the bottom plate, and carry out the static blasting pressure relief;
(3)当卸压巷2的顶底板或两帮移近量达到500～1000mm时，开始掘进大巷，掘巷后，实测大巷两侧的地应力，计算和分析大巷两侧的最大主应力差位置与巷道帮部的相对距离c；(3) When the top and bottom plates of the pressure relief lane 2 or the distance between the two gangs reaches 500-1000mm, the tunnel is started. After the roadway is excavated, the ground stress on both sides of the roadway is measured, and the maximum of both sides of the roadway is calculated and analyzed. The relative distance between the position of the main stress difference and the roadway gang;
(4)从大巷的帮部向最大主应力差位置垂直施工帮部应力优化钻孔，在帮部应力优化钻
孔的孔底装药，实施静力爆破卸压。(4) Optimize the drilling from the gang of the main road to the maximum principal stress difference position vertical construction gang stress, optimize the drilling in the gang stress
The bottom of the hole is charged and static pressure is applied to relieve pressure.
所述的卸压巷位于最大主应力差位置上方或下方层位，卸压巷与大巷的水平距离a为5～30m，垂直距离b为5～30m。The pressure relief lane is located above or below the maximum principal stress difference position, and the horizontal distance a of the pressure relief lane and the roadway is 5-30 m, and the vertical distance b is 5-30 m.
所述底板应力优化钻孔的间距e和排距f均为0.6～2m，底板应力优化钻孔的钻孔长度l1由卸压巷和最大主应力差位置的距离确定。The spacing e and the row spacing f of the bottom plate stress optimized drilling are both 0.6 to 2 m, and the drilling length l 1 of the floor stress optimized drilling is determined by the distance between the pressure relief lane and the maximum principal stress difference position.
所述帮部应力优化钻孔的间距g和排距h均为0.6～2m，帮部应力优化钻孔的长度l2由相对距离c确定。The distance g and the row spacing h of the boring stress optimization drilling hole are both 0.6 to 2 m, and the length l 2 of the boring stress optimization drilling hole is determined by the relative distance c.
所述底板应力优化钻孔和帮部应力优化钻孔的孔底装药区长度d1和d2为1～3m。The bottom plate stress optimization drilling and the rib stress optimization hole length d 1 and d 2 of the hole are 1 to 3 m.
有益效果：本发明通过先在大巷附近相连通的巷道内预测试地应力，分析并计算主应力确定大巷掘进后巷帮最大主应力差的位置。选择大巷所在层位的上下合适层位，最大主应力差位置的上方或下方，掘进2～4条卸压巷，并进行一定的支护，支护强度允许卸压巷发生大的变形。卸压巷与大巷走向平行布置，从卸压巷内向最大主应力差位置施工多列竖直布置钻孔，终孔位置落在最大主应力差位置处，并在孔底装药爆破卸压，优化大巷区域应力场，钻孔的长度由卸压巷和最大主应力差位置的相对距离具体确定。利用卸压巷的变形来优化预掘进大巷的区域应力场。通过卸压巷内钻孔爆破卸压和大巷内钻孔爆破卸压，在大巷掘进前后对最大主应力差位置进行了掘前预卸压和二次精确卸压，能够有效的优化大巷区域应力场。主要优点有：Advantageous Effects: The present invention pre-tests the ground stress in the roadway connected in the vicinity of the main road, analyzes and calculates the principal stress to determine the position of the maximum main stress difference of the roadway after the roadway is driven. Select the appropriate upper and lower horizons of the level of the main road, above or below the maximum principal stress difference position, tunnel 2 to 4 pressure relief lanes, and carry out certain support, the support strength allows large deformation of the pressure relief lane. The pressure relief lane is arranged parallel to the main roadway, and multiple rows of vertical drilling holes are arranged from the pressure relief lane to the maximum principal stress difference position. The final hole position falls at the position of the maximum principal stress difference, and the pressure is discharged at the bottom of the hole. To optimize the stress field in the main roadway, the length of the borehole is determined by the relative distance between the pressure relief lane and the position of the maximum principal stress difference. The deformation of the pressure relief lane is used to optimize the regional stress field of the pre-excavation into the main roadway. Through the blasting pressure relief in the pressure relief tunnel and the blasting pressure relief in the large roadway, the pre-excavation pre-depressurization and the second precise pressure relief are carried out before and after the large roadway excavation, which can effectively optimize the large Lane area stress field. The main advantages are:
1.多条卸压巷道的掘进和变形，调整和降低了大巷附近的地应力分布情况，大巷掘进在时间上滞后于卸压巷掘进，大巷区域应力场得到优化，有利于成巷以后对巷道进行维护；1. Excavation and deformation of multiple pressure relief roadways, adjusting and reducing the distribution of ground stress near the main roadway. The roadway excavation lags behind the pressure relief tunneling in time, and the stress field in the main roadway is optimized, which is beneficial to Chengxiang. Maintenance of the roadway in the future;
2.卸压钻孔的施工对大巷起到了一定的卸压效果；2. The construction of the pressure relief borehole has a certain pressure relief effect on the roadway;
3.从卸压巷和大巷分别在掘巷前和掘巷后对最大主应力差位置进行了两次钻孔爆破卸压，爆破卸压有目的性和针对性，多次爆破卸压，应力优化效果较好；3. From the pressure relief lane and the main road, two drilling and blasting pressure relief were carried out on the position of the maximum principal stress difference before and after the roadway excavation. The blasting pressure relief has the purpose and pertinence, and multiple blasting pressure relief. The stress optimization effect is better;
4采用静力爆破的方式进行爆破卸压，不会对浅部的巷道围岩造成破坏。4 The method of static blasting is used to carry out blasting and pressure relief, which will not cause damage to the surrounding rock of the shallow roadway.
图1为本发明的大巷区域应力场优化方法示意图；1 is a schematic view showing a method for optimizing a stress field in a roadway region according to the present invention;
图2为本发明的卸压巷底板应力优化钻孔布置示意图；2 is a schematic view showing a stress-optimized drilling arrangement of a floor of a pressure relief roadway according to the present invention;
图3为本发明的大巷帮部应力优化钻孔布置示意图。Fig. 3 is a schematic view showing the stress-optimized drilling arrangement of the roadway gang of the present invention.
1-大巷；2-卸压巷；3-最大主应力差位置；4-底板应力优化钻孔；5-帮部应力优化钻孔；6-装药区。
1-alleyway; 2-pressure relief lane; 3-maximum principal stress difference position; 4-floor stress optimization drilling; 5-help stress optimization drilling; 6-charge area.
下面结合附图对本发明的一个实施例作进一步的描述：An embodiment of the present invention will be further described below with reference to the accompanying drawings:
本发明的大巷区域应力场优化方法，具体步骤如下：The method for optimizing the stress field of the roadway region of the present invention, the specific steps are as follows:
(1)确定最大主应力差位置，掘进卸压巷：在大巷1预掘之前，先在预掘的大巷1附近相连通的巷道内测试地应力，得到主应力的大小和方向，计算和分析确定掘进前大巷1两侧的最大主应力差位置3，最大主应力差位置3与巷道帮部的相对距离为c；然后在预掘的大巷1附近层位掘进2～4条卸压巷2；所述的卸压巷2位于最大主应力差位置3上方或下方层位，卸压巷2与大巷1的水平距离a为5～30m，垂直距离b为5～30m，如图1所示；(1) Determine the position of the maximum principal stress difference, and excavate the pressure relief roadway: Before the pre-excavation of the main roadway 1, first test the ground stress in the roadway connected to the adjacent roadway 1 to obtain the magnitude and direction of the principal stress, and calculate And the analysis determines the maximum principal stress difference position 3 on both sides of the main roadway before excavation, the relative distance between the maximum principal stress difference position 3 and the roadway gang is c; then 2 to 4 pieces in the vicinity of the pre-drilled main road 1 The pressure relief lane 2; the pressure relief lane 2 is located above or below the maximum principal stress difference position 3, the horizontal distance a of the pressure relief lane 2 and the main lane 1 is 5-30 m, and the vertical distance b is 5-30 m. As shown in Figure 1;
(2)从卸压巷2底板向最大主应力差位置3垂直施工底板应力优化钻孔4，底板应力优化钻孔4的布置方式如图2所示，钻孔的直径D1为40mm以上，底板应力优化钻孔4的间距e和排距f均为0.6～2m，底板应力优化钻孔4的钻孔长度l1由卸压巷2和最大主应力差位置3的距离确定；底板应力优化钻孔4施工完成后，在底板应力优化钻孔4孔底装药，实施静力爆破卸压；所述底板应力优化钻孔4的孔底装药区6长度d1为1～3m。(2) From the floor of the pressure relief lane 2 to the maximum principal stress difference position 3 vertical construction floor stress optimization drilling 4, the layout of the floor stress optimization drilling 4 is shown in Figure 2, the diameter D 1 of the drilling hole is 40mm or more, The bottom plate stress is optimized. The spacing e and the row spacing f of the borehole 4 are both 0.6 to 2 m. The drilling length l 1 of the bottom plate stress optimization drilling 4 is determined by the distance between the pressure relief lane 2 and the maximum principal stress difference position 3; After the completion of the drilling 4, the bottom hole is optimized to drill the bottom hole of the 4 holes, and the static blasting pressure is applied; the bottom plate stress optimization drilling hole 4 has a length d 1 of 1 to 3 m.
(3)掘进大巷，确定最大主应力差位置：当卸压巷2的顶底板或两帮移近量达到500～1000mm时，开始掘进大巷1，掘巷后，实测大巷1两侧的地应力，得到大巷1所在区域主应力的大小和方向，计算和分析后，得到大巷1两侧的最大主应力差位置3，最大主应力差位置3与巷道帮部的相对距离c；(3) Digging into the main road and determining the position of the maximum principal stress difference: When the top and bottom plates of the pressure relief lane 2 or the distance between the two gangs reaches 500-1000mm, the tunnel is started. After the roadway is excavated, the sides of the roadway are measured. The ground stress gives the magnitude and direction of the principal stress in the area where the main road 1 is located. After calculation and analysis, the maximum principal stress difference position 3 on both sides of the main road 1 is obtained, and the relative distance between the maximum principal stress difference position 3 and the roadway gang is c. ;
(4)巷内施工卸压钻孔，并爆破卸压：从大巷1的帮部向最大主应力差位置3垂直施工帮部应力优化钻孔5，如图3所示，帮部应力优化钻孔5的间距g和排距h均为0.6～2m，帮部应力优化钻孔5的长度l2由相对距离c确定；直径D2为40mm以上。帮部应力优化钻孔5的方向垂直于巷道帮部，在帮部应力优化钻孔5的孔底装药区6装药，进行静力爆破卸压，装药区6的长度d2为1～3m。
(4) Pressure relief drilling in the roadway, and blasting pressure relief: from the gang of the main road 1 to the maximum principal stress difference position 3 vertical construction gang stress optimization drilling 5, as shown in Figure 3, gang stress optimization The pitch g and the row spacing h of the bore 5 are both 0.6 to 2 m, and the length l 2 of the tap stress optimization bore 5 is determined by the relative distance c; the diameter D 2 is 40 mm or more. The stress of the gang is optimized to be perpendicular to the roadway gang, and the charge is optimized in the bottom of the boring area of the boring 5, and the static blasting pressure is applied. The length d 2 of the charging zone 6 is 1 ~3m.
Claims (5)
- 一种大巷区域应力场优化方法，其特在于包括如下步骤：A method for optimizing stress field in a large roadway includes the following steps:(1)在大巷(1)预掘之前，先在预掘的大巷(1)附近相连通的巷道内测试地应力，得到主应力的大小和方向，计算和分析确定掘进前大巷(1)两侧的最大主应力差位置(3)，然后在预掘的大巷(1)附近层位掘进多条卸压巷(2)；(1) Before the pre-excavation of the main road (1), first test the ground stress in the roadway connecting the pre-excavated roadway (1), and obtain the magnitude and direction of the main stress. Calculate and analyze the main roadway before the excavation ( 1) The maximum principal stress difference position on both sides (3), and then dig a number of pressure relief lanes (2) in the vicinity of the pre-drilled main road (1);(2)从卸压巷(2)底板向最大主应力差位置(3)垂直施工底板应力优化钻孔(4)，在底板应力优化钻孔(4)孔底装药，实施静力爆破卸压；(2) From the floor of the pressure relief roadway (2) to the position of the maximum principal stress difference (3) The vertical construction floor stress optimization drilling (4), the bottom plate stress optimization drilling (4) hole bottom charge, static blasting unloading Pressure(3)当卸压巷(2)的顶底板或两帮移近量达到500～1000mm时，开始掘进大巷(1)，掘巷后，实测大巷(1)两侧的地应力，计算和分析大巷(1)两侧的最大主应力差位置(3)与巷道帮部的相对距离c；(3) When the top and bottom plates of the pressure relief roadway (2) reach the distance of 500~1000mm, start to dig into the main road (1). After excavation, measure the ground stress on both sides of the main road (1), calculate And analyzing the maximum principal stress difference position (3) on both sides of the main road (1) and the relative distance c of the roadway gang;(4)从大巷(1)的帮部向最大主应力差位置(3)垂直施工帮部应力优化钻孔(5)，在帮部应力优化钻孔(5)的孔底装药，实施静力爆破卸压。(4) From the gang of the main road (1) to the maximum principal stress difference position (3) vertical construction gang stress optimization drilling (5), in the gang optimization stress drilling (5) hole bottom charge, implementation Static blasting pressure relief.
- 根据权利要求1所述的大巷区域应力场优化方法，其特征在于：所述的卸压巷(2)位于最大主应力差位置(3)上方或下方层位，卸压巷(2)与大巷(1)的水平距离a为5～30m，垂直距离b为5～30m。The roadway region stress field optimization method according to claim 1, wherein the pressure relief lane (2) is located above or below the maximum principal stress difference position (3), and the pressure relief lane (2) is The horizontal distance a of the main road (1) is 5 to 30 m, and the vertical distance b is 5 to 30 m.
- 根据权利要求1所述的大巷区域应力场优化方法，其特征在于：所述底板应力优化钻孔(4)的间距e和排距f均为0.6～2m，底板应力优化钻孔(4)的钻孔长度l1由卸压巷(2)和最大主应力差位置(3)的距离确定。The method for optimizing the stress field of the roadway region according to claim 1, wherein the bottom plate stress optimization drilling hole (4) has a spacing e and a row spacing f of 0.6 to 2 m, and the bottom plate stress is optimized for drilling (4). The drill hole length l 1 is determined by the distance between the pressure relief lane (2) and the maximum principal stress difference position (3).
- 根据权利要求1所述的大巷区域应力场优化方法，其特征在于：所述帮部应力优化钻孔(5)的间距g和排距h均为0.6～2m，帮部应力优化钻孔(5)的长度l2由相对距离c确定。The method for optimizing the stress field of the roadway region according to claim 1, characterized in that: the spacing g and the row spacing h of the boring stress optimization drilling hole (5) are both 0.6 to 2 m, and the rib stress is optimized for drilling ( The length l 2 of 5) is determined by the relative distance c.
- 根据权利要求1所述的大巷区域应力场优化方法，其特征在于：所述底板应力优化钻孔(4)和帮部应力优化钻孔(5)的孔底装药区(6)长度d1和d2为1～3m。 The roadway region stress field optimization method according to claim 1, characterized in that: the bottom plate stress optimization drilling hole (4) and the rib stress optimization hole (5) hole bottom charge area (6) length d 1 and d 2 are 1 to 3 m.
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| WO2018218378A1 (en) * | 2017-05-30 | 2018-12-06 | Basualto Lira Guillermo Enrique | Distension techniques for protecting future underground works exposed to rock explosions |
| CN110307003A (en) * | 2019-08-12 | 2019-10-08 | 中铁二院工程集团有限责任公司 | Suitable for preventing the pressure release pilot tunnel and its construction method of tunnel bottom deformation |
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| CN104564086B (en) * | 2014-12-29 | 2016-08-24 | 中国矿业大学 | A kind of big lane regional stress field optimization method |
| CN107956475A (en) * | 2017-12-13 | 2018-04-24 | 陕西煤业化工技术研究院有限责任公司 | A kind of structure and construction method for protecting development work surrounding rock stability |
| CN109667616A (en) * | 2019-03-02 | 2019-04-23 | 河南理工大学 | Side lane supporting coal roadway tunneling method |
| CN114183139B (en) * | 2021-11-02 | 2024-02-06 | 中煤科工开采研究院有限公司 | Control method and control device for influence of mining on working face |
| CN115263351B (en) * | 2022-08-30 | 2023-04-11 | 中国矿业大学 | Long-distance intelligent jacking pipe construction method for high-stress soft rock large roadway surrounding rock pressure relief roadway |
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