CN115059469B - Advanced large-diameter drilling pre-pressure relief method for small coal pillar tunneling roadway - Google Patents
Advanced large-diameter drilling pre-pressure relief method for small coal pillar tunneling roadway Download PDFInfo
- Publication number
- CN115059469B CN115059469B CN202210818334.4A CN202210818334A CN115059469B CN 115059469 B CN115059469 B CN 115059469B CN 202210818334 A CN202210818334 A CN 202210818334A CN 115059469 B CN115059469 B CN 115059469B
- Authority
- CN
- China
- Prior art keywords
- excavated
- tunnel
- diameter
- roadway
- coal pillar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000005553 drilling Methods 0.000 title claims abstract description 36
- 230000005641 tunneling Effects 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 9
- 238000009412 basement excavation Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000005670 electromagnetic radiation Effects 0.000 claims description 3
- 238000012567 pattern recognition method Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000005065 mining Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
Description
技术领域Technical Field
本发明涉及一种煤矿煤层掘进巷道超前预卸压方法，具体是一种小煤柱掘进巷道超前大直径钻孔预卸压方法。The invention relates to a method for pre-pressure relief in advance of coal seam excavation tunnels in coal mines, in particular to a method for pre-pressure relief in advance of large-diameter drilling holes in small coal pillar excavation tunnels.
背景技术Background technique
我国煤炭资源开发逐渐由东部转向西部、由浅部转向深部，深部煤炭开采围岩应力不断升高，巷道应力环境不断恶化，冲击风险升高，尤其是煤层内掘进巷道已成为冲击地压、煤与瓦斯突出等动力灾害频发区域，严重威胁了深部矿井安全生产及人员生命安全。The development of coal resources in my country has gradually shifted from the east to the west, and from shallow to deep. The stress of surrounding rocks in deep coal mining continues to increase, the stress environment of tunnels continues to deteriorate, and the impact risk increases. In particular, tunnels excavated in coal seams have become a frequent area for dynamic disasters such as rock bursts, coal and gas outbursts, etc., which seriously threaten the safe production of deep mines and the safety of personnel's lives.
为降低由工作面间留设煤柱诱发的冲击地压，煤矿井下采煤工作面间多留设宽度为4.0-8.0m的小煤柱用于防采空区水和/或瓦斯等。在依次准备采煤工作面时，小煤柱两侧工作面巷道基本是先掘一条巷道，待其掘进后再开始掘进小煤柱侧另一条巷道。而后一条巷道掘进时，一侧为实体煤，而另一侧为小煤柱。In order to reduce the rock burst caused by the coal pillars between the working faces, small coal pillars with a width of 4.0-8.0m are often left between the coal mining working faces in coal mines to prevent water and/or gas in the goaf. When preparing the coal mining working faces in sequence, the working face tunnels on both sides of the small coal pillars are basically excavated first, and then the other tunnel on the side of the small coal pillar is excavated after it is excavated. When the latter tunnel is excavated, one side is solid coal and the other side is small coal pillars.
根据现有煤矿的安全要求在冲击危险区域掘进巷道，需对超前煤体进行预卸压，目前超前施工大直径钻孔已成为冲击危险区域煤层掘进巷道主要的预卸压技术。现有采用大直径钻孔进行煤层超前煤体预卸压的过程是：进行掘进巷道超前预卸压是通过巷道每掘进一定距离后停止掘进，在掘进头利用钻机垂直或小角度斜交煤壁向煤壁内部施工数个大直径钻孔，完成后再进行掘进，如此重复循环，实现预卸压过程；另外在巷道掘进经过较高冲击危险区域时，当煤层巷道掘进后在掘进头后方一定距离的巷道两帮也要及时施工大直径钻孔对两帮进行预卸压。由上述过程可知，现有煤层巷道掘进与掘进头超前大直径钻孔施工两者不能同时进行，必须一方停止另一方施工，两者交替进行；且由于掘进头附近掘进机、转载机和胶带输送机等机械设备影响，钻机难以进入，这使得掘进头后方的巷道两帮难以及时施工大直径钻孔卸压。因此现有的方式不仅影响了煤矿煤层巷道的掘进效率，也降低了掘进巷道冲击危险防治效果。故如何提供一种方法，既能通过超前预卸压对掘进巷道冲击危险防治具有较好的效果，还能使得超前预卸压与掘进巷道同时进行，且相互不影响，从而提高煤层巷道的掘进效率，是本行业的研究方向之一。According to the safety requirements of existing coal mines, when tunneling in the impact danger zone, it is necessary to pre-unload the advance coal body. At present, the advance construction of large-diameter drilling holes has become the main pre-unloading technology for tunneling in coal seams in the impact danger zone. The existing process of using large-diameter drilling holes to pre-unload the advance coal body in the coal seam is: the advance pre-unloading of the tunnel is to stop tunneling after each tunneling distance, and use the drilling rig to construct several large-diameter holes vertically or at a small angle to the coal wall inside the tunnel head. After completion, continue tunneling, repeat the cycle to achieve the pre-unloading process; in addition, when the tunnel is excavated through a higher impact danger zone, after the coal seam tunnel is excavated, large-diameter holes should be constructed in time on both sides of the tunnel at a certain distance behind the tunneling head to pre-unload the two sides. From the above process, it can be seen that the existing coal seam tunnel excavation and the advance large-diameter drilling construction of the tunneling head cannot be carried out at the same time. One side must stop the construction of the other side and the two must be carried out alternately; and due to the influence of mechanical equipment such as tunneling machines, transfer machines and belt conveyors near the tunneling head, it is difficult for the drilling rig to enter, which makes it difficult to timely construct large-diameter drilling and pressure relief on both sides of the tunnel behind the tunneling head. Therefore, the existing method not only affects the excavation efficiency of coal seam tunnels in coal mines, but also reduces the effect of preventing and controlling the impact hazard of tunneling tunnels. Therefore, how to provide a method that can have a better effect on the prevention and control of the impact hazard of tunneling tunnels through advance pre-unloading, and can also make the advance pre-unloading and tunneling tunneling be carried out simultaneously without affecting each other, thereby improving the excavation efficiency of coal seam tunnels, is one of the research directions of this industry.
发明内容Summary of the invention
针对上述现有技术存在的问题，本发明提供一种小煤柱掘进巷道超前大直径钻孔预卸压方法，既能通过超前预卸压对掘进巷道冲击危险防治具有较好的效果，还能使得超前预卸压与掘进巷道同时进行，且相互不影响，从而提高煤层巷道的掘进效率。In view of the problems existing in the above-mentioned prior art, the present invention provides a method for pre-unloading pressure by advancing large-diameter drilling in small coal pillar tunneling, which can not only achieve a good effect in preventing and controlling the impact hazard of tunneling tunnels through advance pre-unloading, but also enable the advance pre-unloading and tunneling to be carried out simultaneously without affecting each other, thereby improving the tunneling efficiency of coal seam tunnels.
为了实现上述目的，本发明采用的技术方案是：一种小煤柱掘进巷道超前大直径钻孔预卸压方法，具体步骤为：In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a method for pre-pressure relief of a small coal pillar tunneling tunnel with a large-diameter advance drilling, the specific steps of which are:
A、在小煤柱(小煤柱的形成需要两侧均掘进巷道，此时才能在两条巷道之间形成小煤柱)的一侧已经完成一条巷道掘进工作，并将该巷道作为已掘巷道(该巷道的掘进采用现有方式进行)，并且采用大直径钻孔进行超前及后方对已掘巷道两帮卸压；A. On one side of the small coal pillar (the formation of the small coal pillar requires tunnels to be excavated on both sides, and only then can a small coal pillar be formed between the two tunnels), a tunnel has been excavated, and the tunnel is regarded as an excavated tunnel (the excavation of the tunnel is carried out in the existing way), and a large-diameter drill hole is used to relieve pressure on both sides of the excavated tunnel in advance and in the rear;
B、在小煤柱的另一侧预先确定待掘巷道的宽度及其走向，待掘巷道与已掘巷道平行，然后利用已知的冲击危险性预测方法对掘进巷道预设的路径上存在的冲击危险区域范围和冲击危险性等级进行预测，并分别划定弱、中等和强冲击危险区域；B. Determine in advance the width and direction of the roadway to be excavated on the other side of the small coal pillar. The roadway to be excavated is parallel to the roadway that has been excavated. Then, use the known impact hazard prediction method to predict the impact hazard area range and impact hazard level on the preset path of the excavation roadway, and delineate weak, medium and strong impact hazard areas respectively;
C、按照步骤B确定的待掘巷道的宽度及其走向开始进行巷道掘进，当待掘巷道的掘进头与步骤B确定的冲击危险区域范围之间的距离f小于40m时，在该巷道冲击危险区域对应的相邻小煤柱侧的已掘巷道内，垂直向已掘巷道靠近小煤柱一侧巷帮施工第一个大直径钻孔，大直径钻孔依次穿过小煤柱、待掘巷道进入待掘工作面实体煤内部，在第一个大直径钻孔施工过程中待掘巷道持续进行掘进工作，该大直径钻孔的深度d按下式计算；C. Start tunneling according to the width and direction of the tunnel to be excavated determined in step B. When the distance f between the excavation head of the tunnel to be excavated and the impact danger zone determined in step B is less than 40m, in the excavated tunnel on the side of the adjacent small coal pillar corresponding to the impact danger zone of the tunnel, construct the first large-diameter borehole vertically toward the side of the tunnel near the small coal pillar of the excavated tunnel. The large-diameter borehole passes through the small coal pillar and the tunnel to be excavated in turn and enters the solid coal of the working face to be excavated. During the construction of the first large-diameter borehole, the tunnel to be excavated continues to be excavated. The depth d of the large-diameter borehole is calculated according to the following formula;
d＝a+b+cd＝a+b+c
其中，a为小煤柱宽度，m；b为待掘巷道宽度，m；c为大直径钻孔深入待掘工作面实体煤的深度，m，且需满足c≥2b；从而完成第一个大直径钻孔的施工；Among them, a is the width of the small coal pillar, m; b is the width of the roadway to be excavated, m; c is the depth of the large-diameter borehole into the solid coal of the working face to be excavated, m, and it must satisfy c≥2b; thus completing the construction of the first large-diameter borehole;
D、随着待掘巷道持续掘进，在步骤C施工完成第一个大直径钻孔后，沿预先确定的待掘巷道走向，在第一个大直径钻孔后的已掘巷道靠近小煤柱一侧巷帮呈一排布设多个大直径钻孔，各个大直径钻孔的施工参数相同，各个大直径钻孔之间的间距e根据其穿过冲击危险区域的等级确定，其中穿过弱冲击危险区域的间距为e1，穿过中等冲击危险区域的间距为e2，穿过强冲击危险区域的间距为e3；且e1＞e2＞e3；D. As the tunnel to be excavated continues to advance, after the first large-diameter borehole is completed in step C, multiple large-diameter boreholes are arranged in a row along the predetermined direction of the tunnel to be excavated, near the side of the small coal pillar in the tunnel after the first large-diameter borehole. The construction parameters of each large-diameter borehole are the same. The spacing e between each large-diameter borehole is determined according to the level of the impact hazard area it passes through, wherein the spacing through the weak impact hazard area is e 1 , the spacing through the medium impact hazard area is e 2 , and the spacing through the strong impact hazard area is e 3 ; and e 1 >e 2 >e 3 ;
E、在待掘巷道持续掘进及超前大直径钻孔预卸压同时进行的过程，使每个大直径钻孔在施工过程其位置与掘进头之间的距离始终满足g≥20m，从而完成整个待掘巷道的掘进及卸压过程。E. During the process of continuous excavation of the tunnel to be excavated and pre-pressure relief of large-diameter drilling holes in advance, the distance between the position of each large-diameter drilling hole and the excavation head always satisfies g≥20m during the construction process, thereby completing the excavation and pressure relief process of the entire tunnel to be excavated.
进一步，所述已知的冲击危险性预测方法为综合指数法、多因素模式识别法、多因素耦合分析法、震动波CT反演方法、电磁辐射方法和矿压观测方法中的其中一种或多种联合。Furthermore, the known impact hazard prediction method is a combination of one or more of a comprehensive index method, a multi-factor pattern recognition method, a multi-factor coupling analysis method, a shock wave CT inversion method, an electromagnetic radiation method and a mine pressure observation method.
进一步，所述各个大直径钻孔的直径为100～200mm，间距e1为3.0m，间距e2为2.0m，间距e3为1.0m，所有大直径钻孔距已掘巷道底板的距离h为1.0m～1.5m。采用这种参数设置，不仅能有效保证超前卸压的效果，而且有效提高施工效率。Furthermore, the diameter of each large-diameter borehole is 100-200 mm, the spacing e1 is 3.0 m, the spacing e2 is 2.0 m, the spacing e3 is 1.0 m, and the distance h between all large-diameter boreholes and the bottom plate of the excavated tunnel is 1.0 m-1.5 m. This parameter setting can not only effectively ensure the effect of advanced pressure relief, but also effectively improve the construction efficiency.
与现有技术相比，本发明先在小煤柱形成之前一侧按照常规方式完成巷道掘进，作为已掘巷道，并对已掘工作面进行煤炭开采工作，完成后在小煤柱另一侧确定待掘巷道的宽度及走向，接着通过已知的预测方法确定待掘巷道路径上存在冲击危险区域的范围及其冲击危险等级，此时开始待掘巷道的掘进工作，在掘进过程中当其与确定的冲击危险区域之间的距离小于40m时(在这个距离内开始大直径钻孔施工，才能实现更好的超前卸压效果)，在冲击危险区域对应的已掘巷道内施工与巷道垂直且贯穿小煤柱、待掘巷道及待掘工作面实体煤的大直径钻孔，并呈一排布设多个大直径钻孔进行卸压处理，且各个大直径钻孔之间的间距根据各自大直径钻孔穿过冲击危险区域的等级分别确定，另外在进行大直径钻孔超前卸压的施工过程中持续保持待掘巷道的掘进过程，并保持大直径钻孔的施工位置与掘进头之间始终保持至少20m，这样不仅避免了掘进巷道大直径卸压钻孔施工与巷道掘进间的相互干扰，提高了待掘巷道的掘进效率，且能够有效降低由于掘进设备影响而不能及时施工掘进头后方巷道两帮大直径卸压钻孔对冲击危险防治效果的影响，此外，利用本发明的方法，还能够降低施工掘进巷道大直径钻孔施工时钻机移动次数和使用时长，从而能够降低工程费用，也具有较好的经济效益。因此本发明在提高冲击危险区域小煤柱掘进巷道的掘进效率、冲击危险防治效果和降低大直径钻孔施工费用方面、以及保障矿井高效安全生产方面具有重要意义。Compared with the prior art, the present invention first completes tunnel excavation on one side in a conventional manner before the small coal pillar is formed, which is used as the excavated tunnel, and coal mining is carried out on the excavated working face. After completion, the width and direction of the tunnel to be excavated are determined on the other side of the small coal pillar, and then the range of the impact hazard area on the path of the tunnel to be excavated and its impact hazard level are determined by a known prediction method. At this time, the excavation of the tunnel to be excavated is started. During the excavation process, when the distance between it and the determined impact hazard area is less than 40m (large-diameter drilling construction can be started within this distance to achieve better advanced pressure relief effect), a large-diameter drill hole perpendicular to the tunnel and penetrating the small coal pillar, the tunnel to be excavated and the solid coal of the working face to be excavated is constructed in the excavated tunnel corresponding to the impact hazard area, and a plurality of large-diameter drill holes are arranged in a row for pressure relief. The principle is that the spacing between each large-diameter borehole is determined according to the level of each large-diameter borehole passing through the impact danger zone. In addition, the excavation process of the tunnel to be excavated is continuously maintained during the construction process of the large-diameter borehole advance pressure relief, and the construction position of the large-diameter borehole is always kept at least 20m away from the tunneling head. This not only avoids the mutual interference between the large-diameter pressure relief drilling construction of the tunneling tunnel and the tunnel excavation, improves the excavation efficiency of the tunnel to be excavated, but also can effectively reduce the impact of the large-diameter pressure relief drilling on the two sides of the tunnel behind the tunneling head that cannot be constructed in time due to the influence of the excavation equipment on the impact danger prevention and control effect. In addition, the method of the present invention can also reduce the number of drilling rig movements and the length of use when constructing the large-diameter drilling of the tunneling tunnel, thereby reducing the project cost and having good economic benefits. Therefore, the present invention is of great significance in improving the excavation efficiency of the small coal pillar tunneling tunnel in the impact danger zone, the impact danger prevention and control effect, reducing the construction cost of large-diameter drilling, and ensuring efficient and safe production of mines.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明中巷道掘进头接近冲击危险区域时大直径钻孔布置示意图；FIG1 is a schematic diagram of the arrangement of large-diameter drilling holes when the tunneling head approaches the impact danger zone in the present invention;
图2是本发明中巷道在冲击危险区域掘进时大直径钻孔布置示意图；FIG2 is a schematic diagram of the arrangement of large-diameter drilling holes when the tunnel is excavated in the impact danger zone according to the present invention;
图3是本发明中在垂直巷帮方向的大直径钻孔布置剖面示意图。FIG3 is a schematic cross-sectional view of the arrangement of large-diameter drilling holes in the direction perpendicular to the lane wall in the present invention.
具体实施方式Detailed ways
下面将对本发明作进一步说明。The present invention will be further described below.
如图1所示，本发明的具体步骤为：As shown in Figure 1, the specific steps of the present invention are:
A、在小煤柱的一侧已经完成一条巷道掘进工作，并将该巷道作为已掘巷道，并且采用大直径钻孔进行超前及后方对已掘巷道两帮卸压；A. A tunnel has been excavated on one side of the small coal pillar and the tunnel is regarded as an excavated tunnel. Large diameter drilling is used to relieve pressure on both sides of the excavated tunnel in advance and in the rear.
B、在小煤柱的另一侧预先确定待掘巷道的宽度及其走向，待掘巷道与已掘巷道平行，然后利用已知的冲击危险性预测方法对掘进巷道预设的路径上存在的冲击危险区域范围和冲击危险性等级进行预测，并分别划定弱、中等和强冲击危险区域；B. Determine in advance the width and direction of the roadway to be excavated on the other side of the small coal pillar. The roadway to be excavated is parallel to the roadway that has been excavated. Then, use the known impact hazard prediction method to predict the impact hazard area range and impact hazard level on the preset path of the excavation roadway, and delineate weak, medium and strong impact hazard areas respectively;
C、按照步骤B确定的待掘巷道的宽度及其走向开始进行巷道掘进，当待掘巷道的掘进头与步骤B确定的冲击危险区域范围之间的距离f小于40m时，在该巷道冲击危险区域对应的相邻小煤柱侧的已掘巷道内，垂直向已掘巷道靠近小煤柱一侧巷帮施工第一个大直径钻孔，所述第一个大直径钻孔的直径为150mm，大直径钻孔依次穿过小煤柱、待掘巷道进入待掘工作面实体煤内部，且大直径钻孔距已掘巷道底板的距离h为1.3m。采用这种参数设置，不仅能有效保证超前卸压的效果，而且有效提高施工效率；在第一个大直径钻孔施工过程中待掘巷道持续进行掘进工作，如图3所示，该大直径钻孔的深度d按下式计算；C. Start tunneling according to the width and direction of the tunnel to be excavated determined in step B. When the distance f between the excavation head of the tunnel to be excavated and the impact danger zone determined in step B is less than 40m, in the excavated tunnel on the adjacent small coal pillar side corresponding to the impact danger zone of the tunnel, construct the first large-diameter borehole vertically to the side of the tunnel near the small coal pillar of the excavated tunnel. The diameter of the first large-diameter borehole is 150mm. The large-diameter borehole passes through the small coal pillar and the tunnel to be excavated in turn and enters the solid coal of the working face to be excavated. The distance h between the large-diameter borehole and the bottom plate of the excavated tunnel is 1.3m. This parameter setting can not only effectively ensure the effect of advance pressure relief, but also effectively improve the construction efficiency. During the construction of the first large-diameter borehole, the tunnel to be excavated continues to be excavated, as shown in Figure 3. The depth d of the large-diameter borehole is calculated according to the following formula;
d＝a+b+cd＝a+b+c
其中，a为小煤柱宽度，m；b为待掘巷道宽度，m；c为大直径钻孔深入待掘工作面实体煤的深度，m，且需满足c≥2b；从而完成第一个大直径钻孔的施工；Among them, a is the width of the small coal pillar, m; b is the width of the roadway to be excavated, m; c is the depth of the large-diameter borehole into the solid coal of the working face to be excavated, m, and it must satisfy c≥2b; thus completing the construction of the first large-diameter borehole;
D、随着待掘巷道持续掘进，在步骤C施工完成第一个大直径钻孔后，沿预先确定的待掘巷道走向，在第一个大直径钻孔后的已掘巷道靠近小煤柱一侧巷帮呈一排布设多个大直径钻孔，各个大直径钻孔的施工参数相同，各个大直径钻孔之间的间距e根据其穿过冲击危险区域的等级确定，其中穿过弱冲击危险区域的间距为e1，穿过中等冲击危险区域的间距为e2，穿过强冲击危险区域的间距为e3；e1为3.0m，e2为2.0m，e3为1.0m；D. As the tunnel to be excavated continues to advance, after the first large-diameter borehole is completed in step C, multiple large-diameter boreholes are arranged in a row along the predetermined direction of the tunnel to be excavated, near the side of the small coal pillar in the tunnel after the first large-diameter borehole. The construction parameters of each large-diameter borehole are the same. The spacing e between each large-diameter borehole is determined according to the level of the impact hazard area it passes through, where the spacing through the weak impact hazard area is e1 , the spacing through the medium impact hazard area is e2 , and the spacing through the strong impact hazard area is e3 ; e1 is 3.0m, e2 is 2.0m, and e3 is 1.0m;
E、在待掘巷道持续掘进及超前大直径钻孔预卸压同时进行的过程，如图2所示，使每个大直径钻孔在施工过程其位置与掘进头之间的距离始终满足g≥20m，从而完成整个待掘巷道的掘进及卸压过程。E. The process of continuous excavation of the tunnel to be excavated and pre-pressure relief of large-diameter drilling holes in advance is carried out simultaneously, as shown in Figure 2, so that the distance between the position of each large-diameter drilling hole and the excavation head always satisfies g≥20m during the construction process, thereby completing the excavation and pressure relief process of the entire tunnel to be excavated.
上述已知的冲击危险性预测方法为综合指数法、多因素模式识别法、多因素耦合分析法、震动波CT反演方法、电磁辐射方法和矿压观测方法中的其中一种或多种联合。The above-mentioned known impact hazard prediction methods are a combination of one or more of a comprehensive index method, a multi-factor pattern recognition method, a multi-factor coupling analysis method, a vibration wave CT inversion method, an electromagnetic radiation method and a mine pressure observation method.
以上所述仅是本发明的优选实施方式，应当指出：对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210818334.4A CN115059469B (en) | 2022-07-13 | 2022-07-13 | Advanced large-diameter drilling pre-pressure relief method for small coal pillar tunneling roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210818334.4A CN115059469B (en) | 2022-07-13 | 2022-07-13 | Advanced large-diameter drilling pre-pressure relief method for small coal pillar tunneling roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115059469A CN115059469A (en) | 2022-09-16 |
| CN115059469B true CN115059469B (en) | 2024-06-21 |
Family
ID=83206100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210818334.4A Active CN115059469B (en) | 2022-07-13 | 2022-07-13 | Advanced large-diameter drilling pre-pressure relief method for small coal pillar tunneling roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115059469B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939099A (en) * | 2014-04-11 | 2014-07-23 | 中国矿业大学 | Method for controlling strong shock risk coal seam group rock burst |
| CN109915140A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | A method for preventing and controlling rock burst in coal pillar roadway with irregular island |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067557B (en) * | 2019-04-16 | 2020-08-11 | 中国矿业大学 | Pressure relief method for fully mechanized caving mining bottom coal of steeply inclined coal seam |
| CN112431596B (en) * | 2020-11-26 | 2022-02-15 | 中煤科工开采研究院有限公司 | Three-stage prevention and control method for rock burst roadway |
| CN113202482A (en) * | 2021-06-23 | 2021-08-03 | 李文科 | Deep mining mine three-soft coal seam roadway tunneling drilling pressure relief method |
-
2022
- 2022-07-13 CN CN202210818334.4A patent/CN115059469B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939099A (en) * | 2014-04-11 | 2014-07-23 | 中国矿业大学 | Method for controlling strong shock risk coal seam group rock burst |
| CN109915140A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | A method for preventing and controlling rock burst in coal pillar roadway with irregular island |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115059469A (en) | 2022-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103527198B (en) | Cut a tight roof/top coal hydraulic fracture control method | |
| CN113982582B (en) | Method for treating triangular area overhead of end head by hydraulic fracturing of underground coal face of coal mine | |
| CN112780340B (en) | Method for preventing rock burst in advance in underground coal mine area | |
| CN101280688B (en) | Reagional eliminating method for drilling along the top at prominent coal heading face | |
| CN113153292B (en) | Method of hydraulic fracturing to quickly pass through hard rock faults in underground coal mining working faces of coal mines | |
| CN112160792B (en) | Staged hydraulic fracturing working method for underground hard top plate | |
| CN107120137B (en) | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method | |
| CN111502662B (en) | Prevention and control method for deep pressure relief shallow part reinforcement of rock burst mine advanced coal body | |
| CN107816353A (en) | A kind of excessive drop tomography new method of fully-mechanized mining working | |
| CN110295880A (en) | A kind of optimization of various dimensions hydraulic fracturing roof stops the method for adopting line | |
| CN106930766A (en) | Great burying TBM construction tunnel rock burst processing structures | |
| CN112983418A (en) | Method for hydraulic fracturing pressure relief of coal mine underground coal face withdrawal channel | |
| CN110985123A (en) | High-pressure hydraulic pre-cracking dangerous impact ore pressure crossheading roadway drilling arrangement method | |
| CN116771348A (en) | A method to reduce the impact of dynamic pressure in the main roadway at the end of mining and optimize coal pillars in the stop-mining line | |
| CN108930536A (en) | A kind of method of gob side entry retaining first advance high pressure water injection fracturing tight roof | |
| CN117780349A (en) | A method for densely drilling and cutting the top to relieve pressure and retaining lanes along the goaf in the goaf area of a close-range coal seam | |
| RU2396429C1 (en) | Procedure for weakening marginal massif of mine workings at development of coal beds | |
| CN115012936B (en) | Pressure relief and danger relieving method for coal mine TBM during tunneling and coal penetration | |
| CN116084947A (en) | Method for alternately shielding coal roadway and rapidly tunneling along bedding double-prevention long drilling holes | |
| CN113216912B (en) | Method for reducing mine earthquake level by using perforating gun and hydraulic fracturing | |
| CN115163172A (en) | Advanced pre-extraction rapid coal uncovering method for gas tunnel | |
| CN115059469B (en) | Advanced large-diameter drilling pre-pressure relief method for small coal pillar tunneling roadway | |
| CN112324499A (en) | Method for preventing rock burst by blocking disturbance stress wave | |
| CN109025999B (en) | One-field three-purpose top coal weakening method | |
| CN115405298B (en) | A method for designing pressure relief parameters of directional hydraulic fracturing in underground coal mine working face roof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |