The utility model discloses a large working resistance advance hydraulic support for return air roadway, which comprises two support units arranged side by side with spacers. The two support units have the same structure and are composed of front support and rear support arranged along the longitudinal direction; the front support and rear support are articulated by pushing jack phase; the front support and rear support are articulated by pushing jack phase; and the front support and the rear support are composed of front support and rear support. The same structure consists of Jack beam, shield beam, four-bar mechanism, base, telescopic column, inner bottom-adjusting Jack and outer bottom-adjusting jack; box-type pedal passage is arranged along the inner side of the base, inner bottom-adjusting jack is arranged inside the box-type pedal passage along the transverse direction, and outer bottom-adjusting jack is arranged at the bottom along the transverse direction. Inside the base, the top beam is articulated downwards with an upper gangue plate, while the outer side of the base is articulated upwards with a lower gangue plate, and the upper and lower gangue plates overlap each other. The utility model has the advantages of realizing large working resistance and support strength, reserving safe space for operation and transportation materials, and guaranteeing the normal production advancement of fully mechanized mining face.
【技术实现步骤摘要】
用于回风巷的大工作阻力超前液压支架
本技术涉及综采工作面回风巷超前液压支架，尤其是涉及用于回风巷的大工作阻力超前液压支架。
技术介绍
井下顺槽巷道是现代化综采工作面重要的物料运输以及井下通风通道。由于井下地质条件复杂，岩层应力分布难以准确测算，导致巷道顶板变形、巷道两帮向内收缩挤压内突14、底鼓15现象发生（如图6所示）,直接影响人员及设备安全，故顺槽巷道的支护十分重要。为解决上述巷道支护问题，目前多采用超前液压支架进行机械化支护。近年来，在容易发生巷道底鼓的煤矿生产实践中，超前工作面30～50m范围的巷道，顶板在原有锚杆锚索支护条件下，采用超前支架支护，顶板基本能维护住，但是还存在如下问题：1、支护强度低：现有的巷道支架一般采用230mm～320mm立柱，按照巷道支架顶梁接触巷道顶板的面积计算支护强度一般≤1.2MPa，但是若按照支护区域内全断面（支护的巷道长度×巷道宽度）计算，现有超前支架的支护强度很难超过1Mpa；2、设备安全性不足：巷道两帮的挤压内突，将挤压支护设备导致立柱损害；3、无法有效阻止底鼓的发生：超前支架底座覆盖不到的地方，底鼓的发生激烈大大增加...
【技术保护点】
1.一种用于回风巷的大工作阻力超前液压支架，包括并排间隔设置的两个支护单元，两个所述的支护单元结构相同，均由沿纵向设置的前支架和后支架组成；所述前支架和后支架之间通过推移千斤顶相铰接；前支架和后支架结构相同，均由顶梁、掩护梁、四连杆机构、底座、伸缩立柱、内侧底调千斤顶、外侧底调千斤顶组成；其特征在于：所述底座上位于所述掩护梁的前、后分别间隔设置有两个所述伸缩立柱，每个伸缩立柱的底部和顶部分别通过柱窝与底座和所述顶梁相铰接；底座内侧沿纵向设置有箱型踏板通道，所述内侧底调千斤顶沿横向设置在所述箱型踏板通道内部，所述外侧底调千斤顶沿横向设置在底座内部；顶梁的外侧向下铰接有上挡矸板...
【技术特征摘要】
1.一种用于回风巷的大工作阻力超前液压支架，包括并排间隔设置的两个支护单元，两个所述的支护单元结构相同，均由沿纵向设置的前支架和后支架组成；所述前支架和后支架之间通过推移千斤顶相铰接；前支架和后支架结构相同，均由顶梁、掩护梁、四连杆机构、底座、伸缩立柱、内侧底调千斤顶、外侧底调千斤顶组成；其特征在于：所述底座上位于所述掩护梁的前、后分别间隔设置有两个所述伸缩立柱，每个伸缩立柱的底部和顶部分别通过柱窝与底座和所述顶梁相铰接；底座内侧沿纵向设置有箱型踏板通道，所述内侧底调千斤顶沿横向设置在所述箱型踏板通道内部，所述外侧底调千斤顶沿横向...
【专利技术属性】
技术研发人员：付奇，刘付营，杨文明，龚宇，陈戈，黄磊，张继业，冉玉玺，杨辉，孙攀，
申请(专利权)人：郑州煤矿机械集团股份有限公司，
类型：新型
国别省市：河南,41
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