近年随着煤炭行业的规模化发展，矿井的工程地质条件越来越复杂。复杂的工况导致巷道出现各种失稳破坏现象，选择合理的支护参数是防止失稳现象发生的重要措施。目前的支护参数设计方法大多为静力设计方法，从能量角度进行围岩和支护的分析是一种新角度的支护设计方法，对优化支护参数有着重要的工程意义。本文通过理论分析得到了理想弹性、理想弹塑性及弹—脆—塑性圆形三种情况下的能量分布，提出了围岩能量释放机理，得到了锚杆的吸能计算公式，确定锚杆和围岩的能量转化准则，提出了能量支护理论。以某煤矿回风及运输大巷为工程依托，对能量支护理论进行了合理性验证。论文主要研究成果如下：

（1）建立了理想弹性假设和理想弹塑性假设圆形巷道模型，推导出了理想弹性假设和理想弹塑性假设下圆形巷道模型弹性应变能及其密度分布式，得到理想弹塑性假设圆形巷道模型能量释放公式，提出围岩塑性区的能量释放机理。

（2）基于围岩变形程度和应力重分布状态分析将围岩分为破碎区、塑性区及弹性区，得出了弹—脆—塑性圆形巷道模型破碎区的弹性应变能及密度分布，确定了围岩破碎区和塑性区的能量释放机理。

（3）根据锚杆工作机理，推导出了普通锚杆、让压锚杆的吸能计算公式，根据围岩能量释放机理和锚杆吸能公式，确定了支护与围岩能量转化准则，提出了一种基于围岩能量分析的支护理论（简称能量支护理论）。

（4）根据某煤矿岩层地质参数、巷道几何参数，分别采用传统支护理论和能量支护理论进行锚杆支护参数设计。对两种支护设计方案参数利用FLAC^3D6.0数值模拟软件进行巷道应力、塑性区、竖向位移的对比分析，符合工程要求，验证了本文理论的合理性。

（5）在某煤矿回风、运输大巷进行现场工业性试验，对某煤矿运输大巷试验段某断面采用能量支护理论进行支护，在回风大巷设置对照组，分别对两组监测结果进行对比分析。结果表明，在保证巷道稳定性的前提下，能量支护理论可以较好地发挥锚杆的支护作用，节约一定支护成本。

In recent years, with the large-scale development of the coal industry, the engineering geological conditions of the mine are more and more complex. Complex working conditions lead to various instability and failure phenomena of roadway. Choosing reasonable support parameters is an important measure to prevent instability. The current design method of support parameters is mostly static design method. The analysis of surrounding rock and support from the energy point of view is a new support design method, which has important engineering significance for optimizing support parameters. In this paper, the energy distribution of ideal elasticity, ideal elastic-plasticity and elastic-brittle-plastic circle is obtained through theoretical analysis. The energy release criterion of surrounding rock is proposed, and the energy absorption calculation formula of anchor is obtained. The energy conversion criterion of anchor and surrounding rock is determined, and the energy support theory is proposed. Based on the return air and transportation roadway of a coal mine, the rationality of energy support theory is verified. The main research results are as follows :

(1) The ideal elastic assumption and the ideal elastic-plastic assumption circular roadway model are established.The elastic strain energy and its density distribution of the circular roadway model under the ideal elastic assumption and the ideal elastic-plastic assumption are derived.The energy release formula of the circular roadway model under the ideal elastic-plastic assumption is obtained, and the energy release mechanism of the plastic zone of the surrounding rock is proposed.

(2) Based on the stress redistribution analysis of surrounding rock, the surrounding rock is divided into fracture zone, plastic zone and elastic zone.The elastic strain energy and density distribution of elastic-brittle-plastic circular roadway model fracture zone are obtained, and the energy release mechanism of surrounding rock fracture zone and plastic zone is determined.

(3) According to the working mechanism of bolt, the energy absorption formulas of ordinary bolt and pressure-transfer bolt are deduced. According to the energy release mechanism of surrounding rock and the energy absorption formula of bolt, the energy conversion criterion between support and surrounding rock is determined, and a support theory based on surrounding rock energy analysis ( referred to as energy support theory ) is proposed.

(4) According to the geological parameters and roadway geometric parameters of a coal mine, the traditional support theory and energy support theory are used to design the bolt support parameters. Two kinds of support design parameters using FLAC3D6.0numerical simulation software for roadway stress, plastic zone, vertical displacement comparative analysis, verify the rationality of this theory.

(5) Field industrial tests were carried out in the return air and transportation roadway of a coal mine. The energy support theory was used to support a certain section of the test section of the transportation roadway of a coal mine, and the control group was set in the return air roadway. The monitoring results of the two groups were compared and analyzed. The results show that under the premise of ensuring the stability of roadway, the energy support theory can better play the supporting role of bolt and save a certain support cost.

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