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首页> 外文期刊>Mathematical Problems in Engineering >Study and Application of Roof Cutting Pressure Releasing Technology in Retracement Channel Roof of Halagou 12201 Working Face
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Study and Application of Roof Cutting Pressure Releasing Technology in Retracement Channel Roof of Halagou 12201 Working Face

机译：哈拉沟12201工作面回撤渠道顶板顶切卸压技术的研究与应用。

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摘要

The retracement channel roof cutting (RCRC) technology can change the overburden structure actively by cutting off the roof of channel along the direction of working face tendency and make use of the gangue collapsing from roof cutting range to fill the goaf and weaken the mining pressure during the retracement process of working face. In order to solve the problems of high stress in surrounding rock and serious deformation of retracement channel in Halagou coalmine, it is the first time that the pressure releasing test is carried out on the 12201 working face by the method of the directional presplitting roof cutting in retracement channel. First, according to statics theory and energy theory, the stress state of hydraulic support and roof deformation mechanism of retracement channel are analyzed. Then the roof cutting design of retracement channel is determined according to the geological conditions of 12201 working face, and the cutting effect is analyzed by numerical simulation. Finally, the field test is carried out on the 12201 working face to verify the effect of pressure releasing by roof cutting. The result shows that, with the roof cutting design including the roof cutting height being 8m and roof cutting angle being 45 degrees, the roof subsidence of the 12201 working face retracement channel in Halagou mine is reduced to 132.5mm, and the hydraulic support resistance is maintained at 1361KN. And there is no hydraulic support crushed; the deformation of the retracement channel is also small; namely, the effect of roof cutting for pressure releasing is obvious.
机译：回撤通道顶板切割（RCRC）技术可以通过沿工作面趋势方向切割通道顶板来主动改变覆盖层结构，并利用从顶板切割范围塌陷的脉石来填充采空区并减弱开采压力。工作面的回缩过程。为解决哈拉沟煤矿围岩高应力，回撤通道严重变形的问题，首次采用定向预分顶法对12201工作面进行了泄压试验。回撤通道。首先，根据静力学理论和能量理论，分析了液压支架的受力状态和回撤通道顶板变形机理。然后根据12201工作面的地质条件确定回撤通道的顶板切割设计，并通过数值模拟分析其切割效果。最后，在12201工作面上进行了现场测试，以验证屋顶切割释放压力的效果。结果表明，采用顶板切割设计，包括顶板切割高度为8m，顶板切割角度为45度，哈拉沟矿12201工作面回撤通道顶板沉陷减少到132.5mm，水力支撑阻力为维持在1361KN。而且没有液压支架被压碎；回撤通道的变形也很小。即，切顶对泄压的效果是明显的。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第15期|6568983.1-6568983.15|共15页
  • 作者

    Ma Xingen; He Manchao; Wang Yajun; Zhang Yong; Zhang Jiabin; Liu Yuxing;

  • 作者单位

    China Univ Min & Technol Beijing State Key Lab Geomech & Deep Underground Engn Beijing 100083 Peoples R China|China Univ Min & Technol Beijing Sch Mech & Civil Engn Beijing 100083 Peoples R China;

    China Univ Min & Technol Beijing State Key Lab Geomech & Deep Underground Engn Beijing 100083 Peoples R China|Tongji Univ Dept Geotech Engn Coll Civil Engn Shanghai 200092 Peoples R China;

    Tongji Univ Dept Geotech Engn Coll Civil Engn Shanghai 200092 Peoples R China;

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