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沿空巷道三维锚索支护围岩变形规律研究

ISSN号：1673-3363
期刊名称：采矿与安全工程学报
时间：2011.6.6
页码：187-192
分类：TD353[矿业工程—矿井建设]
作者机构：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083, [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008
相关基金：教育部“新世纪优秀人才支持计划”项目（NCET-08-0837）; 国家重点基础研究发展计划（973）项目（2007CB209400）; 国家自然科学基金重点项目（50834005）;国家自然科学基金项目（51074163）; 江苏省自然科学基金项目（BK2009092）; 江苏省“青蓝工程”项目; 深部岩土力学与地下工程国家重点实验室专项基金项目
相关项目：深井大采高矸石充填综采沿空留巷变形机理及控制

关键词：动压, 沿空巷道, 三维支护, 变形规律, 相似试验, dynamic pressure, gob-side entry, three-dimensional support, deformation law, similarity test

中文摘要：

提出了沿空巷道三维锚索支护技术,结合王庄煤矿沿空掘进巷道5218回风巷的生产地质条件,建立相似材料试验模型和数值计算模型,通过分析表面位移和围岩应力分布特征,对沿空巷道三维锚索支护时巷道围岩的变形规律进行了研究.研究结果表明：三维锚索支护技术能促进巷道顶板压力拱的形成,提高压力拱拱角处的承载能力;当载荷增加至1.4 MPa时,三维锚索支护巷道顶底相对移近量是普通支护的76.7%;两帮相对移近量仅是普通支护的66.7%;计算表明,三维锚索支护巷道顶底相对移近量最大值是普通支护的55.20%、巷道两帮相对移近量最大值是普通支护的52.05%.该研究结果在王庄煤矿5218回风巷支护实践中取得了成功;回采期间,采用三维锚索支护段巷道顶底板移近量最大值是普通锚网索支护的58.14%、两帮相对移近量前者是后者的49.34%.

英文摘要：

The 3-D anchor-cable support technology is put forward,and a similar material model is made to study the deformation law of surrounding rock of gob-side entry supported by 3-D anchor-cable supports based on the similarity theory and the geological conditions of return airway of No.5218 working face in Wangzhuang coal mine.The research on deformation law of surrounding rock of gob-side entry supported by 3-D anchor-cable support is based on analyzing surface displacement and stress distribution of surrounding rocks.The results show that the 3-D anchor-cable support can form a pressure arch in the roof of gob-side entry and improve the carrying capacity.The experiment indicates that as the load reaches 1.4 MPa,the roof to floor convergence and two roadsides convergence of roadway supported by the 3-D anchor-cable are 76.7% and 66.7%,respectively,compared with the condition supported by common bolt-mesh-anchor support.The simulation illustrates that the maximum convergence of roof to floor and the two roadsides of roadway supported by the 3-D anchor-cable are 55.20% and 52.05%,respectively,compared with the condition supported by common bolt-mesh-anchor support.The research achievement has been successfully applied in practice of return airway support of No.5218 working face in Wangzhuang coal mine;and during the extracting stage,the maximum convergence of roof to floor and the two roadsides of roadway supported by the 3-D anchor-cable are 58.14% and 49.34 %,respectively,compared with the condition supported by common bolt-mesh-anchor support.

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