CN-224228645-U - Drilling and grouting integrated rod for surrounding rock of weak roadway

CN224228645UCN 224228645 UCN224228645 UCN 224228645UCN-224228645-U

Abstract

The utility model discloses a drilling and grouting integrated rod for surrounding rock of a weak roadway, which comprises a drill rod, a grouting rod, a drill rod wire pair and a grouting rod wire pair, wherein the drill rod wire pair and the grouting rod wire pair are matched, so that the grouting rod can move in the drill rod, when the drilling state is adopted, the grouting hole of the grouting rod is different from the grouting hole of the drill rod in position and is plugged by a plugging structure, water can directly reach a drill bit in the grouting rod in the drilling process, when the grouting state is adopted, the grouting rod is moved relative to the drill rod, so that the grouting hole is the same as the grouting hole, the plugging structure is removed, at the moment, the grouting hole is communicated with the grouting hole, and then grouting is carried out through the grouting rod, slurry is discharged to gaps between the periphery of each drill rod and the drill hole through each grouting hole, so as to realize support and reinforcement of the drill hole.

Inventors

LIU JINHU
ZANG ZHIWEI
ZHAO XIANGQIAN
LIU SIJIA
YAN SHUAI
CAO HAITAO
FU HAO
TANG YU
ZHU QIANCHENG
LIANG GUODONG

Assignees

徐州矿务集团有限公司
中国矿业大学
江苏国能深井安全开采科技有限公司
江苏徐矿能源股份有限公司张双楼煤矿

Dates

Publication Date: 20260512
Application Date: 20250409

Claims (5)

1. The utility model provides a weak tunnel surrounding rock drilling slip casting integrative pole which characterized in that includes drilling rod, slip casting pole, drilling rod wire pair and slip casting pole wire pair; The drill rods are in a plurality, and two adjacent drill rods are coaxially connected through drill rod opposite wires; The grouting rod wire pairs are positioned in the drill rod and correspond to the drill rod wire pairs one by one, the grouting rod wire pairs comprise two wire pair structures, each wire pair structure comprises a hollow connecting rod and a hollow limiting end, the hollow connecting rod is coaxially connected with the hollow limiting end, the outer diameter of the hollow connecting rod is smaller than the inner diameter of the drill rod wire pairs, and the outer diameter of the hollow limiting end is larger than the inner diameter of the drill rod wire pairs; The grouting device comprises a plurality of grouting rods, wherein the grouting rods are arranged in a drill rod, grouting openings and blocking structures are arranged on the side wall of each grouting rod, two ends of each grouting rod are respectively and coaxially connected with a wire alignment structure of the nearest grouting rod wire alignment, when the drill rod is in a drilling state, the grouting openings are different from grouting holes and the blocking structures are used for blocking the grouting holes, when the drill rod is in a grouting state, the grouting rods are moved to enable the grouting openings to be the same as the grouting holes and the blocking structures are moved away, and at the moment, the grouting openings are communicated with the grouting holes.
2. The drilling and grouting integrated rod for the surrounding rock of the weak roadway according to claim 1, further comprising a grouting rod reset spring, wherein each grouting rod is sleeved on the hollow connecting rod of the corresponding wire, and the grouting rod reset spring is used for resetting the grouting rod after grouting.
3. The drilling and grouting integrated rod for the surrounding rock of the weak roadway according to claim 1, wherein the caliber of the grouting hole gradually increases from the outer wall of the drill rod to the inner wall of the drill rod.
4. The drilling and grouting integrated rod for the surrounding rock of the weak roadway according to claim 1, wherein the plugging structure comprises a plug and a pressure spring, two ends of the pressure spring are respectively connected with the plug and the outer wall of the grouting rod, and when the drill rod is in a drilling state, the plug is in a grouting hole to plug the drill rod.
5. The drilling and grouting integrated rod for the surrounding rock of the weak roadway, which is disclosed in claim 1, is characterized by further comprising a grouting head, wherein the grouting head comprises a shell, a grouting pipeline, a boss, grouting head fixing wire plates and locking nuts, the side wall of the shell is provided with a boss lifting groove, the grouting pipeline penetrates through the shell, the end part of the grouting pipeline is provided with a grouting rod connecting wire opening for being connected with one end of the grouting rod, the boss is fixed on the grouting pipeline and is positioned in the boss lifting groove, when the boss moves in the boss lifting groove, the grouting rod can be driven to move in a drill rod, the grouting head fixing wire plates are circularly arranged at one end of the shell, the wire radius of each grouting head fixing wire plate is gradually reduced from one end far away from the shell to one end close to the shell, the locking nuts are arranged outside the grouting head fixing wire plates, one end of the drill rod extends into the grouting head fixing wire plates, and the locking nuts are rotated towards one end far away from the shell, and each grouting head fixing wire plate is pressed and fixed with the drill rod.

Description

Drilling and grouting integrated rod for surrounding rock of weak roadway Technical Field The utility model belongs to the field of underground drilling, and particularly relates to a drilling and grouting integrated rod for surrounding rocks of a weak roadway. Background Drilling is one of the main techniques currently used in the mining engineering field to ascertain geological conditions. Because of the large drill hole depths, it is common to penetrate aquifers and weak rock formations. The weak rock stratum has the characteristics of low strength, easy disturbance and damage and weakening when meeting water, so that the mechanical property of the weak rock stratum is seriously deteriorated under the combined action of drilling disturbance and water seepage, and the stability of surrounding rock of a roadway is not facilitated. The method is characterized in that the drilling machine is used for drilling the drilling rod, the drilling rod is withdrawn from the drilling rod, the grouting steel pipe is inserted into the drilling rod to perform grouting, and the drilling rod is used for injecting water into the drilling rod to discharge coal and rock fragments in the drilling process. However, after the drill rod is withdrawn from the drill hole, the drill hole is easily closed under the influence of surrounding rock stress and rock characteristics, so that the subsequent grouting pipe cannot be completely inserted into the drill hole, and further the required grouting effect cannot be achieved. Aiming at the situation, how to provide a drilling and grouting integrated rod can realize in-situ grouting without replacing a drill rod after drilling to the grouting depth, so that the grouting effect on the drilling is ensured, and the utility model is the direction of research. Disclosure of Invention Aiming at the problems in the prior art, the utility model provides the drilling and grouting integrated rod for the surrounding rock of the weak roadway, which can realize in-situ grouting without replacing a drill rod after drilling to the grouting depth, thereby ensuring the grouting effect on the drilling. In order to achieve the aim, the technical scheme adopted by the utility model is that the drilling and grouting integrated rod for the surrounding rock of the weak roadway comprises a drill rod, a grouting rod, a drill rod wire pair and a grouting rod wire pair; The drill rods are in a plurality, and two adjacent drill rods are coaxially connected through drill rod opposite wires; The grouting rod wire pairs are positioned in the drill rod and correspond to the drill rod wire pairs one by one, the grouting rod wire pairs comprise two wire pair structures, each wire pair structure comprises a hollow connecting rod and a hollow limiting end, the hollow connecting rod is coaxially connected with the hollow limiting end, the outer diameter of the hollow connecting rod is smaller than the inner diameter of the drill rod wire pairs, and the outer diameter of the hollow limiting end is larger than the inner diameter of the drill rod wire pairs; The grouting device comprises a plurality of grouting rods, wherein the grouting rods are arranged in a drill rod, grouting openings and blocking structures are arranged on the side wall of each grouting rod, two ends of each grouting rod are respectively and coaxially connected with a wire alignment structure of the nearest grouting rod wire alignment, when the drill rod is in a drilling state, the grouting openings are different from grouting holes and the blocking structures are used for blocking the grouting holes, when the drill rod is in a grouting state, the grouting rods are moved to enable the grouting openings to be the same as the grouting holes and the blocking structures are moved away, and at the moment, the grouting openings are communicated with the grouting holes. Further, the grouting device also comprises grouting rod reset springs, and each grouting rod is sleeved with a grouting rod reset spring on the hollow connecting rod of the corresponding wire, and the grouting rod reset springs are used for resetting the grouting rods after grouting. When the drill rod is in the drilling state, the grouting rod reset spring is in an initial state, and when the drill rod is in the grouting state, the grouting rod reset spring is compressed and deformed, and the grouting rod is driven to reset after grouting is completed. Further, the caliber of the grouting hole gradually increases from the outer wall of the drill rod to the inner wall of the drill rod. The plug is convenient to plug, and the plug is driven to move from the inside of the grouting rod when the grouting rod moves. Furthermore, the plugging structure comprises a plug and a pressure spring, wherein two ends of the pressure spring are respectively connected with the plug and the outer wall of the grouting rod, and when the drill rod is in a drilling state, the plug is positioned in the grouting hole t