基于掘锚一体化特厚顶煤巷道快速掘进与支护技术

发布时间：2018-07-24 18:38

【摘要】：为实现掘锚机组在特厚顶煤巷道的安全快速掘进,采用理论计算和数值模拟手段研究了掘进速度对巷道周围应力场、位移场的影响;基于掘锚机组的结构特征,提出顶板和帮部锚杆空间不成排的支护体系;通过改进支护材料、优化操作工序的手段,整体提升了掘进速度。研究结果表明:提高掘进速度,巷道前方支承压力峰值位置向掘进工作面靠近,峰值应力增大,产生的侧向应力区范围和周围煤岩体破坏区的位移都相应减小;不成排的支护体系一定程度减少了顶、帮应力场的叠加,但实现了帮部及时支护。掘锚机施工期间,日均进尺增加到14 m/d,同时降低工人劳动强度,为特厚煤层快速成巷的应用提供了良好的借鉴。
[Abstract]:In order to realize the safe and fast driving of excavating anchor unit in the roadway of super thick top coal, the influence of tunneling speed on stress field and displacement field around roadway is studied by theoretical calculation and numerical simulation, and based on the structural characteristics of excavating and anchor unit, the influence of driving speed on the stress field and displacement field around the roadway is studied. This paper puts forward the support system which is not arranged in the space of roof and side bolt, and by improving the supporting material and optimizing the means of operation procedure, the driving speed is improved as a whole. The results show that when the driving speed is increased, the peak position of the supporting pressure in front of the roadway approaches to the heading face, the peak stress increases, and the range of the lateral stress and the displacement of the surrounding coal and rock failure zone decrease accordingly. The discontinuous support system reduces the roof and stress field to some extent, but realizes the timely support. During the construction of the excavating and anchoring machine, the average daily advance is increased to 14 m / d, and the labor intensity of the workers is reduced, which provides a good reference for the application of the fast-forming roadway in the ultra-thick coal seam.
【作者单位】：煤炭科学研究总院;天地科技股份有限公司开采设计事业部;
【基金】：国家自然科学基金煤炭联合基金重点资助项目(U1261211) 中国煤炭科工集团科技创新基金重点资助项目(2014ZD001)
【分类号】：TD263.56;TD353

【相似文献】