A hydraulic support for preventing bumping in a roadway and a method for preventing bumping

Abstract

The present application relates to roadway anti-blasting support technical field, and relates to a kind of anti-blasting hydraulic support of foot stretching type roadway, comprising: unit hydraulic support and single hydraulic support, the unit hydraulic support is main hydraulic support, the single hydraulic support is auxiliary hydraulic support, the single hydraulic support is set in the end of unit hydraulic support, and single hydraulic support is rotated relative to unit hydraulic support by push cylinder, change the foot of support, avoid main hydraulic support to incline or even collapse, so that the stability of the overall hydraulic support greatly increases, and support strength also increases;The present application makes the stability of the overall hydraulic support greatly increase by the structure of foot stretching type, and support strength and support resistance also increase;In addition, compared with the traditional anti-blasting column hydraulic support, the present application can absorb more impact energy and can deal with the occurrence of secondary impact ground pressure, and energy-absorbing device is convenient to replace, and practicality and convenience are high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of roadway bumping support, in particular to a foot spread type roadway bumping hydraulic support and a bumping prevention method thereof. BACKGROUND

[0002] In recent years, most of the mines have entered the deep mining stage, which makes the mechanical properties of deep surrounding rock and the existing support face serious challenges. The frequency and intensity of rock burst increase. Therefore, the problem of supporting the recovery roadway of the deep working face to prevent rock burst becomes a research topic that needs to be solved urgently for safe and efficient mining of deep mines.

[0003] Hydraulic support is widely used in recovery roadway due to its strong protection performance, fast support moving speed, and strong adaptability to the roof. Deep mining is prone to rock burst area with large ground stress and fast roadway deformation speed. The hydraulic support is required to meet the following requirements: when the roadway is dynamically deformed due to rock burst, the support can quickly give way, absorb part of the pressure of the impact load, ensure that the support has high support resistance and support strength to adapt to large energy rock burst and thus is not damaged. The stability of the support itself also needs to be met to prevent tilting and collapse. At present, the anti-tilting hydraulic support has appeared, which installs an anti-tilting plate at the base of the support to form a stable triangular structure by connecting the anti-tilting plate and the base of the support through a hydraulic cylinder. However, for double telescopic hydraulic supports, due to their high support height, the anti-tilting plate cannot effectively prevent the hydraulic support from tilting or even collapsing when subjected to lateral load impact. Increasing the area of the anti-tilting plate will also affect the normal operation of the roadway. Therefore, the existing anti-tilting energy-absorbing bumping hydraulic support has limitations. SUMMARY

[0004] The present application provides a buffer energy-absorbing type hydraulic support base that can overcome some or all of the deficiencies of the prior art.

[0005] According to the foot spread type roadway bumping hydraulic support of the present application, a unit type hydraulic support and a single body type hydraulic support are provided. The unit type hydraulic support is a main body hydraulic support, and the single body type hydraulic support is an auxiliary hydraulic support. The single body type hydraulic support is arranged at the end of the unit type hydraulic support. The single body type hydraulic support is driven to rotate relative to the unit type hydraulic support by a push cylinder, thereby changing the foot spread of the support and preventing the main body hydraulic support from tilting or even collapsing. The stability of the overall hydraulic support is greatly improved, and the support resistance and support strength are also increased.

[0006] Preferably, a male rotating pin is arranged on the single body type hydraulic support, and a female rotating pin is arranged on the unit type hydraulic support. The male rotating pin and the female rotating pin are hingedly connected.

[0007] Preferably, a push oil cylinder is hingedly arranged on the unitary hydraulic support, a piston rod of the push oil cylinder is hingedly arranged with a slide column, the slide column is slidingly arranged in a slide rail, and a slide plate is hingedly arranged with the other end of the slide plate being hingedly arranged with the unitary hydraulic support.

[0008] Preferably, two slide plates are hingedly arranged on the slide column, each of the two slide plates is hingedly arranged with a unitary hydraulic support, the two unitary hydraulic supports are connected through a male rotating pin and a female rotating pin, and the two unitary hydraulic supports are rotated through the extension and retraction of the piston rod of the push oil cylinder, so as to form a V-shaped support for supporting.

[0009] Preferably, the push oil cylinder, the male rotating pin, the female rotating pin, the slide column, the slide rail and the slide plate are also arranged on the bottom beam of the unitary hydraulic support and the unitary hydraulic support, so that the top beam and the bottom beam of the hydraulic support are synchronously rotated.

[0010] Preferably, the unitary hydraulic support and the unitary hydraulic support are both provided with a top plate energy-absorbing device and a base energy-absorbing device.

[0011] Preferably, the base energy-absorbing device is arranged in a pulling mechanism, and the base energy-absorbing device can be replaced at any time through the pulling mechanism.

[0012] Preferably, the application also discloses a method for preventing the hydraulic support from being impacted.

[0013] A, the base energy-absorbing device is set as a first energy-absorbing device, the energy-absorbing starting pressure of the first energy-absorbing device is smaller than that of the top plate energy-absorbing device, when impact pressure occurs, the base energy-absorbing device as the first energy-absorbing device first reacts to the impact pressure, absorbs impact energy through its own plastic deformation, so that the overflow valve on the stand column of the unitary hydraulic support and the unitary hydraulic support has sufficient time to open and release pressure, avoiding damage in the form of hydraulic stand column explosion.

[0014] B, the top plate energy-absorbing device is set as a second energy-absorbing device, the number of impact is not unique when actual roadway impact ground pressure occurs, and there are occurrence of aftershock impact and other working conditions, so the top plate energy-absorbing device as the second energy-absorbing device should cope with the secondary impact of impact ground pressure and the situation that the base energy-absorbing device cannot continue to absorb impact energy when the impact ground pressure energy is large.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] While meeting the anti-impact performance requirements for rockbursts, the extended-leg structure greatly increases the overall stability of the hydraulic support, as well as the support resistance and strength. Furthermore, compared to traditional anti-impact column hydraulic supports, this invention can absorb more impact energy and cope with secondary rockbursts. The energy-absorbing device is easy to replace, offering high practicality and convenience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the extended-leg anti-impact hydraulic support with energy absorption device of the present invention;

[0018] Figure 2 A schematic diagram of the overall front view of the hydraulic support for tunnel anti-collision;

[0019] Figure 3 A top-view schematic diagram of the overall hydraulic support for tunnel anti-collision;

[0020] Figure 4 This is a schematic diagram showing the result of an explosion at the support connection point.

[0021] in:

[0022] 1. Unit hydraulic support; 101. Female rotating pin; 102. Push cylinder; 103. Slide rail; 104. Slide column; 2. Single hydraulic support; 201. Male rotating pin; 202. Sliding plate; 3. Top plate energy absorption device; 4. Base energy absorption device; 401. Pull-out mechanism. Detailed Implementation

[0023] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0024] Example 1

[0025] like Figures 1-4 As shown, a type of extended-leg hydraulic support for roadway anti-impact includes a unit hydraulic support 1 and a single hydraulic support 2. The unit hydraulic support 1 is the main hydraulic support, and the single hydraulic support 2 is an auxiliary hydraulic support. The single hydraulic support 2 is located at the end of the unit hydraulic support 1. By pushing the hydraulic cylinder 102, the single hydraulic support 2 is driven to rotate relative to the unit hydraulic support 1, changing the extension of the support legs and preventing the main hydraulic support from tilting or even collapsing. This greatly increases the overall stability of the hydraulic support, and also increases the support resistance and support strength.

[0026] A male rotating pin 201 is provided on the single hydraulic support 2, and a female rotating pin 101 is provided on the unit hydraulic support 1. The male rotating pin 201 and the female rotating pin 101 are hinged together.

[0027] The unit hydraulic support 1 is hingedly provided with a push cylinder 102, the piston rod of the push cylinder 102 is hingedly connected with a slide column 104, the slide column 104 is slidingly arranged in a slide rail 103, and the slide column 104 is further hingedly provided with a slide plate 202, the other end of the slide plate 202 is hingedly connected with the single hydraulic support 2, in this way, through the extension and retraction of the piston of the push cylinder 102, the slide column 104 is driven to move forward and backward in the slide rail 103, and then the slide plate 202 hingedly connected with the slide column 104 is swung, since the length of the slide plate 202 is fixed, the single hydraulic support 2 is driven to rotate around the hinge point of the unit hydraulic support 1.

[0028] Two slide plates 202 are hingedly arranged on the slide column 104, each of the two slide plates 202 is hingedly provided with a single hydraulic support 2, the two single hydraulic supports 2 are connected with the male rotating pin 201 and the female rotating pin 101, through the extension and retraction of the piston of the push cylinder 102, the two single hydraulic supports 2 are driven to rotate, and a V-shaped support is formed to provide the stability of the whole hydraulic support, as shown in the figure. Figure 3

[0029] The push cylinder 102, the male rotating pin 201, the female rotating pin 101, the slide column 104, the slide rail 103 and the slide plate 202 are arranged on the bottom beam of the single hydraulic support 2 and the unit hydraulic support 1, so that the top beam and the bottom beam of the hydraulic support are synchronously rotated, and the main support column of the hydraulic support is prevented from being subjected to a torsional moment.

[0030] The top plate energy-absorbing device 3 and the base energy-absorbing device 4 are arranged on the unit hydraulic support 1 and the single hydraulic support 2.

[0031] The base energy-absorbing device 4 is driven to move downward after the hydraulic support base is impacted, and the energy absorber in the base energy-absorbing device 4 is crushed to absorb the impact energy, so as to serve as a first energy-absorbing device.The top plate energy-absorbing device 3 is connected with the unit hydraulic support 1 and the single hydraulic support 2 in the form of a sliding groove, and the energy absorption structure itself is plastically deformed to realize energy absorption, so as to serve as a second energy-absorbing device.

[0032] The base energy-absorbing device 4 is arranged on the pulling mechanism 401, and the base energy-absorbing device 4 can be replaced at any time through the pulling mechanism 401, the base energy-absorbing device 4 serves as a first energy-absorbing device, and the energy absorption is relatively frequent, so the base energy-absorbing device 4 needs to be replaced frequently, and in this way, the practicability and convenience are greatly improved.

[0033] In addition, the application further discloses a method for preventing impact of the hydraulic support, which comprises the following steps:

[0034] A, the base energy absorbing device 4 is set as the first energy absorbing device, and the energy absorbing starting pressure thereof is smaller than that of the top plate energy absorbing device 3; when impact pressure occurs, the base energy absorbing device 4 as the first energy absorbing device firstly reacts to the impact pressure, absorbs the impact energy through plastic deformation, and enables the overflow valve on the column in the unit hydraulic support 1 and the single hydraulic support 2 to be opened and depressurized in time, thereby avoiding damage in the form of hydraulic column cylinder explosion.

[0035] B, the top plate energy absorbing device 3 is set as the second energy absorbing device; when impact ground pressure occurs in the actual roadway, the number of impacts is not unique, and the occurrence of aftershock impact and other working conditions exists; therefore, the top plate energy absorbing device 3 as the second energy absorbing device should cope with the secondary impact of the impact ground pressure and the situation that the base energy absorbing device 4 cannot continue to absorb the impact energy when the impact ground pressure energy is large.

[0036] The above describes the present application and its embodiments in a schematic manner, and the description is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, similar structural modes and embodiments can be designed without creativity, and all of them should belong to the protection scope of the present application.

Claims

1. A hydraulic support for use in a longwall coal face, comprising: Unit type hydraulic support (1) and single type hydraulic support (2), characterized in that: the unit type hydraulic support (1) is the main body hydraulic support, the single type hydraulic support (2) is the auxiliary hydraulic support, the single type hydraulic support (2) is arranged at the end of unit type hydraulic support (1), the single type hydraulic support (2) is driven by push oil cylinder (102) to rotate relative to unit type hydraulic support (1), the foot of the support is changed, the main body hydraulic support is prevented from tilting or even collapsing, the stability of the whole hydraulic support is greatly increased, and the support strength and support resistance are also increased; Two single type hydraulic supports (2) are arranged at one end of the unit type hydraulic support (1) and are connected with the push oil cylinder (102).

2. The hydraulic support according to claim 1, wherein: A male rotating pin (201) is arranged on the single type hydraulic support (2), and a female rotating pin (101) is arranged on the unit type hydraulic support (1), and the male rotating pin (201) is hingedly connected with the female rotating pin (101).

3. The hydraulic support according to claim 2, wherein: A push oil cylinder (102) is hingedly arranged on the unit type hydraulic support (1), a piston rod of the push oil cylinder (102) is hingedly connected with a slide column (104), the slide column (104) is slidably arranged in a slide rail (103), and the slide column (104) is further hingedly connected with a sliding sheet (202), and the other end of the sliding sheet (202) is hingedly connected with the single type hydraulic support (2).

4. The hydraulic support according to claim 3, wherein: Two sliding sheets (202) are hingedly arranged on the slide column (104), one single type hydraulic support (2) is hingedly arranged on each of the two sliding sheets (202), the two single type hydraulic supports (2) are connected with the male rotating pin (201) and the female rotating pin (101), and the two single type hydraulic supports (2) are rotated by the extension and retraction of the piston rod of the push oil cylinder (102), so that the V-shaped support is formed to support.

5. The hydraulic support according to claim 4, characterized in that: The push oil cylinder (102), the male rotating pin (201), the female rotating pin (101), the slide column (104), the slide rail (103) and the sliding sheet (202) are also arranged on the bottom beam of the single type hydraulic support (2) and the bottom beam of the unit type hydraulic support (1), so that the top beam and the bottom beam of the single type hydraulic support (2) are synchronously rotated.

6. The hydraulic support according to claim 5, characterized in that: The unit type hydraulic support (1) and the single type hydraulic support (2) are both provided with a top plate energy absorption device (3) and a base energy absorption device (4).

7. The hydraulic support according to claim 6, characterized in that: The base energy absorption device (4) is arranged in a pulling mechanism (401), and the base energy absorption device (4) can be replaced at any time through the pulling mechanism (401).

8. A method for preventing bumping of a hydraulic support for preventing bumping in a roadway, the hydraulic support being a hydraulic support for preventing bumping in a roadway according to claim 6 or 7, characterized in that, Including: A, the base energy absorption device (4) is used as the first energy absorption device, and the energy absorption starting pressure of the base energy absorption device (4) is less than that of the top plate energy absorption device (3), when the impact pressure is applied, the base energy absorption device (4) as the first energy absorption device firstly reacts to the impact pressure, absorbs the impact energy through the plastic deformation, so that the relief valve on the column of the unit type hydraulic support (1) and the single type hydraulic support (2) has sufficient time to open and release pressure, and damage such as hydraulic cylinder explosion is avoided. B, the roof energy-absorbing device (3) is provided as the second energy-absorbing device, the number of impacts is not unique when the actual roadway is subjected to the impact ground pressure, and the occurrence of aftershock impact and other working conditions, therefore, the roof energy-absorbing device (3) as the second energy-absorbing device, can cope with the secondary impact of the impact ground pressure and the situation that the base energy-absorbing device (4) cannot continue to absorb the impact energy when the impact ground pressure energy is large.

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