煤巷层状顶板岩石钻进动态响应特性数值试验

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摘要层位组合和物理力学性质是锚杆支护煤巷顶板稳定性的重要影响因素，顶板锚固孔钻进装置对于不同岩石类型具有不同的动力响应，可间接反应岩层的厚度与强度。因此，为克服煤巷顶板岩层状况的隐蔽性问题，合理设计锚杆支护参数，防止出现冒顶问题，对较易发生冒顶事故的煤巷顶板岩石类型进行钻进特性数值试验，研究结果表明：煤巷顶板岩石钻进过程是不连续的，锚固孔的形成是“跳跃式”的；在岩石为均质条件下，钻进速度关系为：砂质泥岩＞粉砂岩＞泥岩＞砂岩，钻头所受阻力关系为：粉砂岩＞砂岩＞泥岩＞砂质泥岩。以上指标在钻进锚固孔过程中利用相关仪器进行监测，对于判别煤巷顶板锚固孔范围内岩石类型及厚度具有重要意义。

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关键词 ：岩石力学, 锚杆支护煤巷, 层状顶板, 钻削破岩, 钻进动力响应, 数值试验

Abstract：Horizon combination as well as physico-mechanical characteristics severely influence the stability of rock bolting roof in coal roadway，and the drilling device of anchoring holes has different responses to different types of rock，which provides information of thickness and strength on rock. In order to overcome concealment problems of roof in coal roadway，design bolting parameters reasonably and prevent roof falling，numerical experiments about drilling characteristics on roof in coal roadway were carried out. Study shows that the drilling on roof in coal roadway is discontinuous and anchoring holes are deepened step by step like jump. Under the condition of homogeneous rock，the drilling speed from high to low is sandy mudstone，siltstone，mudstone and sandstone，while the resistance of bore bit from large to small is siltstone，sandstone，mudstone and sandy mudstone. Above indices are monitored by related instruments during drilling anchoring holes，which are very significant to distinguish the type and thickness of roof rock within the scope of anchoring holes in coal roadway.

Key words： rock mechanics bolting coal roadway stratified roof rock breaking and drilling drilling dynamic response numerical experiment

收稿日期: 2013-05-24

引用本文:

刘少伟，冯友良，刘栋梁. 煤巷层状顶板岩石钻进动态响应特性数值试验[J]. 岩石力学与工程学报, 2014, 33(sl): 3170-3176.
LIU Shaowei，FENG Youliang，LIU Dongliang. NUMERICAL EXPERIMENTS OF DYNAMIC RESPONSE CHARACTERISTICS OF ROCK DRILLING ON STRATIFIED ROOF IN COAL ROADWAY. , 2014, 33(sl): 3170-3176.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/Isl/3170

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