CN-121976820-A - Shock absorption and isolation support bracket for soft rock roadway and use method thereof

CN121976820ACN 121976820 ACN121976820 ACN 121976820ACN-121976820-A

Abstract

A seismic reduction and isolation support bracket for a soft rock roadway and a use method thereof relate to the technical field of coal mine soft rock roadway support and comprise two-stage bottom plates, upright posts, tensile anchor pipes, roadway top beams, high-strength damping springs, short anchors, rod bodies, supporting plates, anchor plates, intermediate shafts and nuts, wherein short anchor reserved grooves are formed in the roadway top beams, short anchor support construction can be carried out in the grooves, the roadway top beams are fixed through the anchor plates, the roadway top beams are overlapped with the upright posts through the high-strength damping springs and upright post grooves, three groups of high-strength damping springs are arranged between the two-stage bottom plates and are overlapped with the upright posts in a transverse extrusion mode, and therefore a freely movable structure is formed. When the soft rock roadway support is carried out, the impact can be effectively displayed on the mine pressure of different degrees, the personal and property safety of underground workers is guaranteed, meanwhile, the soft rock roadway support can be continuously used under the condition of slight bottom bulging of the bottom plate through the arrangement of the two-stage bottom plate, and the soft rock roadway support has the advantages of simple structure, reasonable design, strong practicability and wide application prospect.

Inventors

JING QINGHE
YANG JIHUI
ZOU DI
WANG JINHAO
LI QIUSHI
YANG YU
WANG XIANJUN
MENG FANKANG

Assignees

扎赉诺尔煤业有限责任公司
辽宁工程技术大学

Dates

Publication Date: 20260505
Application Date: 20260128

Claims (7)

1. The vibration reduction and isolation support for the soft rock roadway is characterized by comprising a first-stage base plate (1), a tensile anchor pipe (2), upright posts (3), upright post grooves (4), short anchors (5), roadway top beams (6), high-strength damping springs (7), a second-stage base plate (8), a rod body (9), a supporting plate (10), an anchor plate (11), an intermediate shaft (12) and nuts (13), wherein the tensile anchor pipe (2) holes are formed in the first-stage base plate (1), 3 high-strength damping springs (7) are arranged between the first-stage base plate and the second-stage base plate (8), two ends of the high-strength damping springs are movably overlapped with the upright posts (3), the upright post grooves (4) are formed in one end of each upright post (3) so as to be movably overlapped with the roadway top beams (6), and the short anchors (5) are reserved grooves are formed in the roadway top beams (6), and the short anchors (5) consist of the anchor plate (11), the supporting plate (10), the rod body (9) and the intermediate shaft (12), so that vibration reduction and isolation effects on the mine pressure are displayed in a movable overlapping mode.
2. The shock-absorbing and insulating support bracket for the soft rock roadway according to claim 1, wherein the first-stage bottom plate (1) is provided with holes for tensile anchor pipes (2), and the number and the positions of the holes depend on the actual situation of surrounding rock.
3. The shock-absorbing and insulating support for the soft rock roadway according to claim 1, wherein the first-stage bottom plate (1) and the second-stage bottom plate (8) are movably connected through three high-strength damping springs (7).
4. The shock-absorbing and insulating support for soft rock roadway according to claim 1, wherein the roadway top beam (6) is provided with tensile anchor pipe (2) holes, and the number and the positions of the tensile anchor pipe holes are determined according to the actual situation of surrounding rock.
5. The seismic isolation support bracket for the soft rock roadway according to claim 1, wherein the short anchor (5) consists of an anchor plate (11), a support plate (10), a rod body (9) and an intermediate shaft (12), and an anchoring effect is achieved through extrusion of the anchor plate (11) and surrounding rocks arranged at two ends.
6. The shock-absorbing and insulating support for the soft rock roadway according to claim 1, wherein the short anchor (5) rod body is provided with threads, and two ends of the short anchor are fixed with the anchor plate (11) through nuts (13).
7. The application method of the shock absorption and insulation support bracket for the soft rock roadway is characterized by comprising the following steps of: step one, driving upright posts into the side line position of the roadway side part in the soft rock roadway excavation process, installing a first-stage bottom plate (1), and installing a tensile anchor pipe (2) at a reserved tensile anchor pipe (2) hole; Step two, horizontally arranging 3 high-strength damping springs (7), if the number of the high-strength damping springs (7) is properly increased in an ore vibration frequent area, arranging a second-stage bottom plate (8) on the high-strength damping springs, and keeping movable lap joint with the upright posts (3) at two ends; and thirdly, placing a high-strength damping spring (7) in the upright post groove (4), installing a roadway top beam (6), enabling the roadway top beam (6) to be fully contacted with the high-strength damping spring (7), installing a short anchor (5) at a reserved hole of the reserved short anchor (5), and completing splicing.

Description

Shock absorption and isolation support bracket for soft rock roadway and use method thereof Technical Field The invention relates to the technical field of roadway support, in particular to a soft rock fully-mechanized coal mining roadway mine pressure buffer support structure and a use method thereof. Background In the coal mining process, the coal-based sedimentary weak stratum is quite common, has low strength and large thickness, is easy to deform, and particularly has more complicated stress environment after entering into a deep environment, and once a roadway is excavated and revealed, an overlying strata can collapse instantly after the key strata collapses, so that huge impact is formed on the roadway, the personal and property safety of workers in the roadway is seriously threatened, the section form of the roadway is difficult to maintain, and the coal mining operation is seriously influenced. Grouting reconstruction or grouting improvement of surrounding rock mechanical properties is a relatively effective control means at present, but the stress uncertainty caused by the increase of mining depth is difficult to ensure by only the grouting means, and the reliability and durability of the whole roadway structure are difficult to ensure. At present, most of soft rock fully-mechanized roadway supports of coal mines are fixedly connected, are single in form and lack buffering function on mine pressure impact. The existing supporting structure has the defects that 1, most of the supporting structures are rigidly connected, effective buffering cannot be carried out when the phenomenon of mine pressure appearance occurs, only the supporting structures are opposed by rigidity, large-area surrounding rock deformation of a roadway is easy to cause, 2, the supporting structure of the roadway is single in function, the supporting structure of the roadway and the bottom plate is prevented and treated by only one of the supporting structures, and the two functional requirements cannot be met simultaneously. Disclosure of Invention In order to solve the defects of a soft rock roadway support structure in the prior art, the invention provides the shock-absorbing and isolating support bracket for the soft rock roadway and the use method thereof, the connection mode of a roadway top beam, a bottom plate and an upright post is adjusted to be movably lapped, and a high-strength damping spring is attached for buffering, so that the shock-absorbing and isolating effect is realized, meanwhile, the arrangement of two-stage top plates can ensure that the roadway integral structure can be continuously used under the condition of slight bottom bulging of the bottom plate, the personal and property safety of underground workers is ensured, and valuable time is reserved for personnel and machinery in time withdraw. In order to achieve the above object, the technical scheme of the present invention is as follows: a vibration reduction and isolation support bracket for a soft rock roadway comprises two-stage bottom plates, upright posts, tensile anchor pipes, roadway top beams, high-strength damping springs, short anchors, rod bodies, support plates, anchor plates, intermediate shafts and nuts; The first-stage bottom plate is provided with tensile anchor pipe holes, and the number and the positions of the holes are determined according to the actual condition of surrounding rock; The first-stage bottom plate and the second-stage bottom plate are movably overlapped through three high-strength damping springs; The roadway top beam is provided with tensile anchor pipe holes, and the number and the positions of the tensile anchor pipe holes depend on the actual situation of surrounding rock; The short anchor consists of an anchor plate, a supporting plate, a rod body and a middle shaft, and an anchor effect is realized by extrusion of the anchor plates and surrounding rocks which are arranged at two ends; the short anchor rod body is provided with threads, and two ends of the short anchor rod body are fixed with the anchor plate through nuts; The vibration reduction and isolation support bracket for the soft rock roadway and the use method thereof comprise the following steps: step one, driving upright posts into the side line position of the roadway side part in the soft rock roadway excavation process, installing a first-stage bottom plate, and installing a tensile anchor pipe at a reserved tensile anchor pipe hole; step two, horizontally arranging 3 high-strength damping springs, if the number of the high-strength damping springs is increased properly in an ore vibration frequent area, arranging a second-stage bottom plate on the high-strength damping springs, and keeping movable lap joint with upright posts at two ends; placing a high-strength damping spring in the upright post groove, installing a roadway top beam, enabling the roadway top beam to be in full contact with the high-strength damping spring, installing a short a