深部高应力软岩巷道置孔释压材料孔数合理性研究
Rationality of Hole Number of Pressure Relief Material in Deep High Stress Soft Rock Roadway
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摘要: 针对深部高应力巷道大变形支护难题，为充分减少对围岩扰动，改善支护效果，减少巷道返修次数，以北京长沟裕矿-500 m水平底板巷道为研究背景，在综合分析巷道矿压显现规律及巷道变形机理基础上，提出了深部高应力巷道新型置孔释压支护方法；并综合运用理论分析与物理相似模拟实验的方法,对不同孔数条件下，置孔释压材料抗压强度以及连续变形量进行了分析。结果表明：释压材料的置孔数为18孔时，巷道顶底板相对位移量最小，巷道围岩完整程度提高，支架受力合理。Abstract: To solve the problem of large deformation support for deep high-stress roadway, to fully reduce the disturbance to the surrounding rock, improve the support effect, and reduce the number of roadway repairs, take the roadway in Changgouyu Mine -500 m level in Beijing as a research background, based on a comprehensive analysis of the underground pressure behavior and roadway deformation mechanism, a new type of pressure relief support method for deep high stress roadway is proposed. The methods of theoretical analysis and physical similarity simulation experiment are applied synthetically, and the compressive strength and continuous deformation of pressure relief materials with different number of holes were analyzed. The results show that when the number of holes in the pressure relief material is 18 holes, the relative displacement of the roof and floor of the roadway is the minimum, the integrity of roadway surrounding rock is improved, and the force of the support is reasonable.
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