黄山铜镍矿膨胀破碎巷道支护参数优化研究

为解决新疆哈密黄山铜镍矿巷道出现的严重片帮,垮冒等工程灾害问题,通过采用现场超声波测试方式,引用波速梯度最大数值作为松动圈范围判别准则,确定该矿山490m中段1#脉外运输巷道的围岩松动圈范围为1.8m~2.0m；结合现场踏勘、岩体质量分级及实测松动圈范围,分析得出现有支护方案不能满足支护要求。依据围岩松动圈测试结果及理论计算结果,初步确定黄山铜镍矿490m中段1#脉外运输巷道采用树脂锚杆+金属网+喷射混凝土联合支护方式,树脂锚杆长2.5m,锚杆间排据均为1.2m,喷射混凝土厚度为100mm,在此基础上,采用数值模拟方法,进行支护参数优化与现场支护方案对比,模拟结果显示,优化的支护方案可控制围岩变形,提高围岩自稳能力,具有良好的支护效果。

Study on Optimization of Supporting Parameters for Swelling and Broken Roadway in Huangshan Copper-Nickel Mine

In order to solve the problems of serious disasters such as breakage, collapse, etc. in the Huangshan copper-nickel mine in Hami, Xinjiang, through the field ultrasonic testing, and the maximum value of the wave velocity gradient was used as the criterion for determining the range of the loose circle. It is determined that the range of surrounding rock loose zone of the mine is 1.8m~2.0m, combined with field surveys, rock mass quality classification, and measured loosening zone ranges, the analysis shows that the existing support scheme cannot meet the support requirements. Based on the test results and theoretical calculations, it was preliminarily determined that the transportation roadway adopts the resin anchor and metal mesh and sprayed concrete combined support method. The length of the resin bolt is 2.5m, the spacing between bolts is 1.2m, and the thickness of shotcrete is 100mm. Then, the numerical simulation method was used to compare the effect between the support parameter optimization scheme and the field support scheme. The optimized support scheme can control the deformation of surrounding rock and improve its self-stabilizing ability, which has good support effect.