高煤帮破坏机理及控制技术

发布时间：2018-05-24 23:14

本文选题：高煤帮 + 压剪破坏　；参考：《煤炭工程》2017年02期

【摘要】：针对高煤帮巷道两帮的大变形问题,以霍尔辛赫煤层条件为例,数值模拟分析了其煤帮破坏机理,即在围岩压力下产生压剪破坏,四角形成强剪切区,连接成似"C"形剪切带,上部煤体斜向滑移,在巷帮中部变形最大;采用锚杆锚索联合支护后,剪切应变值及塑性破坏范围均有所减小。根据模拟结果及相关成功工程经验,提出煤帮层次化支护技术,即锚索或注浆锚索配合锚杆支护。在西辅运大巷进行了强力锚杆锚索控制高煤帮的现场试验,监测表明巷帮锚索有效控制了帮部顶角剪切滑移造成的失稳,巷道变形和离层均较小,取得较好支护效果。
[Abstract]:Aiming at the problem of large deformation of two sides of high coal side roadway, taking the condition of Halshinhe coal seam as an example, the failure mechanism of coal side is numerically simulated and analyzed, that is, compression shear failure occurs under surrounding rock pressure, and the four corners form a strong shear zone, which is connected into a "C" shaped shear zone. When the upper coal body slips diagonally, the deformation is the largest in the middle of the roadway, and the shear strain and the plastic failure range decrease after the bolting and cable supporting. According to the simulation results and relevant successful engineering experience, the hierarchical support technology of coal side is put forward, that is, bolting cable or grouting anchor cable with bolt support. The field test of strong anchor cable controlling high coal side is carried out in the west auxiliary roadway. The monitoring results show that the roof anchor cable can effectively control the instability caused by the shear slip of the top angle of the slope, and the deformation of the roadway and the separation of the strata are smaller, and better supporting effect has been obtained.
【作者单位】：煤炭科学研究总院开采研究分院;天地科技股份有限公司开采设计事业部;煤炭资源高效开采与洁净利用国家重点实验室;
【基金】：国家自然科学基金委员会与神华集团有限责任公司联合资助项目(U1261211) 天地科技开采设计事业部生产力转化基金项目(KJ-2015-TDKC-05)
【分类号】：TD353

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