阅读说明：本技术 一种超大采高液压支架 (Super large mining height hydraulic support ) 是由 曾明胜 李明忠 韩会军 张金虎 李提建 于 2020-06-16 设计创作，主要内容包括：本发明公开了一种超大采高液压支架,它包括顶梁和安装在该顶梁上的双层护顶护帮机构,该顶梁包括上层滑道腔和下层滑道腔,该双层护顶护帮机构包括上层伸缩梁护顶机构和三级护帮机构,该上层伸缩梁护顶机构包括可滑动地安装在该上层滑道腔的上层伸缩梁以及与该上层伸缩梁匹配的上层伸缩梁千斤顶,所述三级护帮机构包括可滑动地安装在该下层滑道腔的下层伸缩梁、与该下层伸缩梁匹配的下层伸缩梁千斤顶以及安装在该下层伸缩梁前端的三级护帮本体。本发明得到的超大采高液压支架,以应对日益增大的工作面开采高度带来的护帮问题,适应特厚煤层一次采全高开采。(The invention discloses a hydraulic support with ultra-large mining height, which comprises a top beam and a double-layer top protecting and side protecting mechanism arranged on the top beam, wherein the top beam comprises an upper-layer slideway cavity and a lower-layer slideway cavity, the double-layer top protecting and side protecting mechanism comprises an upper-layer telescopic beam top protecting mechanism and a three-stage side protecting mechanism, the upper-layer telescopic beam top protecting mechanism comprises an upper-layer telescopic beam which is slidably arranged in the upper-layer slideway cavity and an upper-layer telescopic beam jack matched with the upper-layer telescopic beam, and the three-stage side protecting mechanism comprises a lower-layer telescopic beam which is slidably arranged in the lower-layer slideway cavity, a lower-layer telescopic beam jack matched with the lower-layer telescopic beam and a three-stage side protecting body arranged at the front end of the lower-layer telescopic beam. The super-large mining height hydraulic support is used for solving the problem of side protection caused by the increasing mining height of a working face and is suitable for one-time full-height mining of an extra-thick coal seam.)

1. The utility model provides a super large mining height hydraulic support which characterized in that: it includes the back timber and installs the double-deck top protection group's mechanism on this back timber, and this back timber includes upper slide chamber and lower floor's slide chamber, and this double-deck top protection group's mechanism includes that the flexible roof beam in upper strata protects a mechanism and tertiary group's mechanism that protects, and this upper flexible roof beam protects a mechanism and includes that slidable ground installs the flexible roof beam in upper strata in this upper slide chamber and the flexible roof beam jack in upper strata that matches with this upper flexible roof beam, tertiary group's mechanism that protects includes that slidable ground installs the flexible roof beam in lower floor in this lower floor's slide chamber, the flexible roof beam jack in lower floor that matches with this lower flexible roof beam and install the tertiary group body that protects in this lower flexible roof beam front end.

2. The ultra-large mining height hydraulic support of claim 1, which is characterized in that: the upper layer slideway cavity of the top beam is a plurality of upper small cavities which are transversely arranged, the upper layer telescopic beam comprises upper telescopic sections which are correspondingly inserted into the upper small cavities, and the front ends of the upper telescopic sections are fixedly connected.

3. The ultra-large mining height hydraulic support of claim 2, which is characterized in that: the upper layer slideway cavity of the top beam is three upper small cavities which are transversely arranged.

4. The hydraulic support with the ultra-large mining height according to any one of claims 1 to 3, wherein the width of the lower-layer slideway cavity is smaller than that of the upper-layer slideway cavity, rear lug plates used for hinging the rear ends of the upper-layer telescopic beam jacks are arranged on the bottom plates of the upper slideway cavities on two sides of the lower-layer slideway cavity, and the front ends of the upper-layer telescopic beam jacks are hinged to the front lug plates on two sides of the front ends of the upper-layer telescopic beams.

5. The ultra-large mining height hydraulic support of claim 2, which is characterized in that: the lower layer slideway cavity comprises two lower small cavities which are correspondingly and alternately positioned below the upper small cavities on the two sides of the upper layer slideway cavity.

6. The ultra-large mining height hydraulic support of claim 5, which is characterized in that: the lower layer telescopic beam comprises lower telescopic sections which are correspondingly inserted into the lower small cavities, and the front ends of the lower telescopic sections are fixedly connected.

7. The ultra-large mining height hydraulic support of claim 5, which is characterized in that: the front ends of the two lower-layer telescopic beam jacks are correspondingly hinged to the front ear plates on two sides of the front end of the lower-layer telescopic beam, and the rear ends of the lower-layer telescopic beam jacks are hinged to the rear connecting lugs connected with the bottom wall of the lower slideway cavity.

Technical Field

The invention relates to a coal mine working face supporting device, in particular to a hydraulic support with an ultra-large mining height.

Background

With the development of the coal mining technical level, the original records of the underground coal mining depth and the mining height in China are continuously refreshed, and the parameters of the working face support hydraulic support are also continuously adjusted to adapt to the increased mining height and the mine pressure. The maximum mining height of a working face at the current stage is about 7m generally, mining is carried out at the high coal cutting height, the rib caving phenomenon of a coal wall is serious, the control difficulty of the stability of surrounding rocks of the working face is increased, the stability of the coal wall cannot be effectively controlled by the second-stage rib protection, the rib protection area is increased by the third-stage rib protection mechanism developed on the basis, and the rib protection height is about 4 m. However, the problems that the response speed of a hydraulic system is slow, the top protection and the side protection are not timely, the system reliability is low and the like can be caused by adding the side protection plate on the basis of three-stage side protection when the height of the higher coal cutting reaches more than 8 m.

Disclosure of Invention

The invention aims to solve the technical problems and provide the hydraulic support with the ultra-large mining height, the top protection and the side protection of the hydraulic support separately and independently work, and the system response is timely and reliable.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a hydraulic support is adopted to super large, it includes the back timber and installs the double-deck top protection group's mechanism on this back timber, and this back timber includes upper slide chamber and lower floor's slide chamber, and this double-deck top protection group's mechanism includes that upper telescopic beam protects a mechanism and tertiary group's mechanism that protects, and this upper telescopic beam protects a mechanism and includes that slidable ground installs at the upper telescopic beam in this upper slide chamber and the upper telescopic beam jack that matches with this upper telescopic beam, tertiary group's mechanism that protects includes that slidable ground installs at the lower flexible beam in this lower floor's slide chamber, with the lower telescopic beam jack that this lower telescopic beam matches and install the tertiary group body that protects at this lower telescopic beam front end.

Specifically, the upper sliding way cavity of the top beam is a plurality of upper small cavities which are transversely arranged, the upper telescopic beam comprises upper telescopic sections which are correspondingly inserted into the upper small cavities, and the front ends of the upper telescopic sections are fixedly connected.

Preferably, the upper slideway cavity of the top beam is three upper small cavities which are transversely arranged.

Preferably, the width in lower floor's slide chamber is less than the width in upper slide chamber, be equipped with on the bottom plate in the upper slide chamber of lower floor's slide chamber both sides and be used for the articulated back otic placode of the outer jar rear end of upper telescopic beam jack, the piston rod front end of this upper telescopic beam jack is articulated on the front otic placode of the front end both sides of upper telescopic beam.

Preferably, the lower-layer slideway cavity comprises two lower small cavities, and the two lower small cavities are correspondingly and alternately positioned below the upper small cavities on the two sides of the upper-layer slideway cavity.

Preferably, the lower layer telescopic beam comprises lower telescopic sections correspondingly inserted into the lower small cavities, and the front ends of the lower telescopic sections are fixedly connected.

Preferably, the front ends of the piston rods of the two lower-layer telescopic beam jacks are correspondingly hinged to the front lug plates on two sides of the front end of the lower-layer telescopic beam, and the rear ends of the outer cylinders of the lower-layer telescopic beam jacks are hinged to the rear connecting lugs connected to the bottom wall of the lower slideway cavity.

The invention has the beneficial effects that: according to the hydraulic support with the ultra-large mining height, the double-layer telescopic beams respectively and independently act, the response speed of a mechanism system is guaranteed, and a top plate and a coal wall in front of the hydraulic support are timely and reliably protected. After the coal cutter cuts coal, the coal cutter can extend out of the upper telescopic beam in time to support the exposed top plate, so that the roof fall phenomenon is prevented; and the lower layer telescopic beam and the three-level side protection body can be extended out in time to support the front coal wall, so that the phenomenon of side caving of the coal wall is prevented. Meanwhile, the wall protection problem caused by the increasing mining height of the working face is solved, the wall protection height is increased by 500-800mm compared with that of the existing three-level wall protection mechanism, the wall protection mechanism is suitable for one-time full-height mining of an extra-thick coal seam, effective coal wall stability control measures are provided, and wall caving is prevented.

Drawings

FIG. 1 is a schematic structural diagram of an ultra-large mining height hydraulic support.

FIG. 2 is a schematic structural view of the double-deck telescopic roof beam rib-forming prevention mechanism of the present invention in a retracted state relative to the roof beam.

Fig. 3 is a schematic view of the upper ramp chamber of the upper telescoping beam of fig. 2 extending out of the header.

Fig. 4 is a schematic structural diagram of the extended top beam of the upper telescopic beam mechanism and the three-stage side protection mechanism in fig. 2. Fig. 5 is a schematic plan view of the structure of fig. 4.

Fig. 6 is a partial structural schematic diagram of fig. 2.

Fig. 7 is a view-angle structure of the top beam of the present invention.

Fig. 8 is a schematic view of another aspect of the header of the present invention.

FIG. 9 is a schematic illustration of the comparison of the height of the inventive highwall with the height of a prior art three-level highwall.

Detailed Description

The following description is given by way of example only, and is not intended to limit the scope of the invention.

Referring to fig. 1 to 8, the hydraulic support with an ultra-large mining height according to the present invention includes a top beam 1 and a double-layer top and side protection mechanism 2 mounted on the top beam 1, where the top beam 1 includes an upper-layer slideway cavity 11 and a lower-layer slideway cavity 12, the upper-layer slideway cavity 11 is a plurality of side-by-side upper small cavities, preferably three, and the lower-layer slideway cavity 12 is a plurality of spaced lower small cavities, preferably two; the double-layer top protection and side protection mechanism 2 comprises an upper-layer telescopic beam top protection mechanism 21 and a three-level side protection mechanism 22, wherein the upper-layer telescopic beam top protection mechanism 21 comprises an upper-layer telescopic beam 211 which is slidably arranged in the upper-layer slideway cavity and an upper-layer telescopic beam jack 212 matched with the upper-layer telescopic beam 211, the upper-layer telescopic beam is roughly in a fork head shape and comprises upper telescopic sections which are correspondingly inserted into the upper small cavities, and the front ends of the upper telescopic sections are fixedly connected; the three-pole side protection mechanism 22 comprises a lower-layer telescopic beam 221 slidably mounted in the lower-layer slideway cavity, a lower-layer telescopic beam jack 222 matched with the lower-layer telescopic beam 221 and a three-level side protection body 223 hinged to the front end of the lower-layer telescopic beam 221, wherein the lower-layer telescopic beam comprises two lower telescopic sections correspondingly inserted into the two lower small cavities, and the front ends of the lower telescopic sections are fixedly connected; the three-level protective wall body structure is the prior art and is not described herein again.

In order to make the structure compact and be convenient for installation and dismantle and go up telescopic girder jack, the width in lower floor's slide chamber 12 is less than the width in upper slide chamber 11 roughly is "protruding" type, and two should be little chambeies down correspond the interval and are located the below of the last loculus in the both sides in upper slide chamber all is squarely with little chamber down, has welded the slide way board respectively on the roof of each last loculus, is equipped with the spout on the roof of the telescopic girder in upper strata that corresponds the slide way board. The bottom plates of the upper slide way cavities 11 on the two sides of the lower slide way cavity 12 are provided with rear ear plates 13 which are respectively used for hinging the rear ends of the outer cylinders of the upper telescopic beam jacks 212, and the front ends of the piston rods of the upper telescopic beam jacks 212 are hinged on the front ear plates 14 on the two sides of the front ends of the upper telescopic beams.

Specifically, the front ends of the piston rods of the two lower-layer telescopic beam jacks are correspondingly hinged to front lug plates 15 on two sides of the front end of the lower-layer telescopic beam, and the rear ends of the outer cylinders of the lower-layer telescopic beam jacks are hinged to rear connecting lugs 16 connected to the bottom wall of the lower slideway cavity.

In conclusion, the top beam is designed into a double-cavity structure, the upper-layer slideway cavity and the lower-layer slideway cavity are respectively provided with the upper-layer telescopic beam and the lower-layer telescopic beam, and the double-layer telescopic beams respectively and independently act, so that the response speed of a mechanism system is ensured to timely and reliably protect a top plate and a coal wall in front of the hydraulic support. After the coal cutter cuts coal, the coal cutter can extend out of the upper telescopic beam in time to support the exposed top plate in time, so that the roof fall phenomenon is prevented; the lower layer telescopic beam and the three-level side protection mechanism extend out of the coal wall in front of the support to prevent the coal wall from caving. Meanwhile, the height of the protective wall of the support is increased by L which is 500-800mm (as shown in figure 9) compared with the height of the protective wall of the support with only a three-stage protective wall mechanism, namely, the thought that the height of the protective wall is achieved by only increasing the stages of protective wall plates in the past is broken through, the support is suitable for ultra-large mining height exploitation, the height of the protective wall is large, effective coal wall stability control measures are provided, and the coal wall is prevented from being broken.

And the hydraulic systems of the upper and lower telescopic beams and the three-stage side protection body respectively act independently. When the hydraulic support is transported, the upper and lower telescopic beams and the three-stage side wall body are in a retraction state, as shown in fig. 2. When the underground working is carried out, the upper layer telescopic beam, the lower layer telescopic beam and the three-stage side wall body are in an extending state, as shown in figure 4. When the coal mining machine approaches, the three-level side protection body, the upper layer telescopic beam and the lower layer telescopic beam are retracted simultaneously to avoid the coal mining machine, the side spalling prevention mechanism returns to the state shown in the figure 2, when the coal mining machine passes through the coal cutting, the three-level side protection mechanism, the upper layer telescopic beam and the lower layer telescopic beam timely extend out, the side spalling prevention mechanism is in the state shown in the figure 4, the front end of the upper layer telescopic beam contacts with the exposed top plate, and the front end of the lower layer telescopic beam and the side spalling plate of the three-level side protection mechanism contact with the front coal.