CN-122014309-A - Locking device for top beam of tunnel anti-collision support

Abstract

The invention relates to the technical field of coal mine safety support, in particular to a roadway anti-collision support top beam locking device which comprises a unit support and a bridge type energy-absorbing top beam, wherein a unit support top beam is arranged above the unit support, locking devices are arranged on the front side and the rear side of the unit support top beam, the locking devices comprise a fixing seat, a base, a pressing rod and a pressing head, wherein the fixing seat is welded at the bottom end of the unit support top beam and is convenient for fixing the pressing rod, the base is welded at the side face of the unit support top beam, a connecting rod is arranged in the base and is used for hinging the pressing rod with the base, meanwhile, the pressing head is hinged with the base, and the pressing rod is hinged with the pressing head to form a four-bar mechanism for slewing and limiting the pressing rod and the pressing head.

Inventors

• XIAO YONGHUI
• GUO HAO
• PAN YISHAN
• ZHANG JIANZHUO
• GUO CHENGUANG

Assignees

• 辽宁大学
• 辽宁工程技术大学

Dates

Publication Date

20260512

Application Date

20230708

Claims (6)

1. 1. A roadway impact-resistant support top beam locking device comprises a unit support (1) and a bridge type energy-absorbing top beam (9) supported by the unit support (1) and located above the unit support, and is characterized in that a unit support top beam (5) is arranged above the unit support (1), a plurality of rectangular positioning bosses (501) are designed at the upper end of the unit support top beam (5), a plurality of groups of limiting grooves (907) are formed below two ends of the bridge type energy-absorbing top beam (9), the limiting grooves (907) are matched with the positioning bosses (501) for use, and the bridge type energy-absorbing top beam (9) and the unit support top beam (5) are connected into a whole through a locking device (10).
2. 2. The roadway impact-resistant support top beam locking device according to claim 1, wherein the locking device (10) comprises a base (1002) welded on the unit support top beam (5), a connecting rod used for hinging a pressing rod (1003) with the base (1002) is arranged in the base (1002), meanwhile, a pressing head (1004) is hinged with the base (1002), and the pressing rod (1003) is hinged with the pressing head (1004) to form a four-bar mechanism for driving the pressing head (1004) to swing.
3. 3. The roadway anti-collision support top beam locking device of claim 2, wherein a fixing seat (1001) is welded at the bottom end of the unit support top beam (5), and limiting and releasing of the pressure rod (1003) can be achieved through inserting and pulling a limiting pin (1005).
4. 4. The roadway impact-resistant support top beam locking device according to claim 1, wherein arc grooves (906) are formed in two sides of the bridge type energy-absorbing top beam (9), a pressure head (1004) in the locking device (10) is matched with the arc grooves (906), so that the pressure head (1004) can be just clamped into the arc grooves (906), and limiting fixation of the unit support top beam (5) and the bridge type energy-absorbing top beam (9) is achieved.
5. 5. The roadway impact-resistant support top beam locking device according to claim 4, wherein at least two groups of locking devices (10) are respectively arranged on the front side and the rear side of the unit support top beam (5), a plurality of arc-shaped grooves (906) are formed on the side of an upper platform beam section (901) of the bridge type energy-absorbing top beam (9), and the distance between two unit supports (1) is adjusted by matching with the locking devices (10).
6. 6. The roof beam locking device of a tunnel impact-resistant support as set forth in claim 5, wherein the number of the arc-shaped grooves (906) is an integer multiple of the number of the locking devices (10), and multi-gear width adjustment is formed to improve the adaptability of the support to the tunnel.

Description

Locking device for top beam of tunnel anti-collision support Technical Field The invention relates to the technical field of roadway anti-collision support, in particular to a roadway anti-collision support top beam locking device. Background Rock burst is one of typical dynamic disasters affecting mine mining safety, and large-scale mining of coal has been performed for many years to greatly reduce occurrence of shallow coal seams, and deep mining is continued to be performed to meet requirements. However, as the mining depth increases, the ground stress characteristics, surrounding rock stress states, coal stress levels, occurrence environments and other aspects of the coal seam become more complex. The hydraulic support adopted by the fully mechanized mining face has high strength and density and stronger capability of resisting rock burst. The roadway is used as a key passage for underground mining, is an important underground structure for transportation, drainage and ventilation, and the supporting strength and the supporting density of the hydraulic support in the roadway cannot reach the level of a working surface due to the special requirements of the roadway. The number of times of tunnel rock burst in China accounts for about 90% of the total number of coal mine rock burst, and as the tunnel excavation time increases, the elastic region of the overlying strata gradually transforms to the plastic region and the plastic region gradually transforms to the crushing region, so that the support of the tunnel and the resistance to the rock burst are extremely important in order to ensure the safe and effective stoping work. The main stream hydraulic support mode adopted at the present stage aims at roadway support and comprises a pile type hydraulic support, a single hydraulic support, a unit type hydraulic support, a self-moving type hydraulic support, a door type hydraulic support and the like, all the supports have the characteristics of the supports, but the supports are slightly insufficient in the aspect of impact resistance to rock burst, the occurrence of the rock burst of the roadway is an energy conversion process, when the energy is transmitted to surrounding rock of the roadway, energy is required to be absorbed through a support system, the hydraulic support serves as an important ring of the support system, and the hydraulic support can ensure the requirement of support stress but cannot meet the energy absorption requirement. The hydraulic support is provided with the safety valve, the generation time of rock burst is extremely short and is usually less than 50ms, and the opening time of the safety valve is longer than the value, so that before the safety valve is not opened, the whole support is in global rigidity, the energy released by the rock burst cannot be effectively converted, energy absorption can be completed only through equipment damage, the support is often subjected to various failure problems such as cylinder expansion, bending, cylinder explosion, breakage and the like, the support is the last ring of roadway support, and after the support is damaged, the roadway integrity and the stability are changed, so that great harm is brought to the life safety and the production safety of workers. Through on-site investigation and theoretical analysis, the roadway is deformed under the action of long-time mining stress, so that the top plate and the bottom plate are deformed, the two roadways are contracted inwards, the roadway is different in width in the trend, most of the brackets except the door-type bracket do not consider supporting the two roadways, the width of the door-type bracket is not adjustable, the adaptability to the deformed roadway is not strong, meanwhile, the interior of the roadway is influenced by humidity and high temperature, the bolts are easy to rust and corrode, and the dismounting and the bolts are difficult. Disclosure of Invention The invention provides a roadway anti-collision support top beam locking device which can overcome certain or certain defects in the prior art. The roadway anti-collision support top beam locking device comprises a unit support and a bridge type energy-absorbing top beam which is supported by the unit support and is positioned above the unit support, and is characterized in that a unit support top beam is arranged above the unit support, a plurality of rectangular positioning bosses are designed at the upper end of the unit support top beam, a plurality of groups of limiting grooves are formed below two ends of the bridge type energy-absorbing top beam, the limiting grooves are matched with the positioning bosses for use, and the bridge type energy-absorbing top beam and the unit support top beam are connected into a whole through the locking device. Preferably, the locking device comprises a base welded on the top beam of the unit bracket, a connecting rod used for hinging the pressure rod with the base is arranged in the b